Submitted Successfully!
To reward your contribution, here is a gift for you: A free trial for our video production service.
Thank you for your contribution! You can also upload a video entry or images related to this topic.
Version Summary Created by Modification Content Size Created at Operation
1 + 3277 word(s) 3277 2021-09-19 16:03:23 |
2 format correct Meta information modification 3277 2021-09-26 10:51:55 |

Video Upload Options

Do you have a full video?

Confirm

Are you sure to Delete?
Cite
If you have any further questions, please contact Encyclopedia Editorial Office.
Fu, J. Promising Biomarkers of RILI. Encyclopedia. Available online: https://encyclopedia.pub/entry/14570 (accessed on 18 June 2024).
Fu J. Promising Biomarkers of RILI. Encyclopedia. Available at: https://encyclopedia.pub/entry/14570. Accessed June 18, 2024.
Fu, Jiamei. "Promising Biomarkers of RILI" Encyclopedia, https://encyclopedia.pub/entry/14570 (accessed June 18, 2024).
Fu, J. (2021, September 26). Promising Biomarkers of RILI. In Encyclopedia. https://encyclopedia.pub/entry/14570
Fu, Jiamei. "Promising Biomarkers of RILI." Encyclopedia. Web. 26 September, 2021.
Promising Biomarkers of RILI
Edit

Radiation-induced lung injury (RILI) is one of the main dose-limiting side effects in patients with thoracic cancer during radiotherapy. No reliable predictors or accurate risk models are currently available in clinical practice. Severe radiation pneumonitis (RP) or pulmonary fibrosis (PF) will reduce the quality of life, even when the anti-tumor treatment is effective for patients. Since the clinical symptoms or imaging changes identifying toxicity do not appear in the early stage, ideal biomarkers are crucial for early diagnosis and intervention in order to prevent lung complications.

radiation-induced lung injury signaling pathways biomarkers

1. Key Immune Cells

An increasing number of studies have suggested that inflammatory responses are closely associated with RILI. Especially in RP, the variation in the number of immune cells is a potential indicator (Table 1). It was found that CD4+ T lymphocyte levels were obviously lower in the early period of RP, and decreased lymphocyte count was associated with the severity of RP in lung cancer patients after thoracic radiotherapy, which was consistent with animal experiments [1]. Moreover, as T cells determine the specificity of immune responses in tissue inflammation, the quantity of CD4+ T cells and CD4+:CD8+ T cell ratio decreased significantly at the onset of RP compared with the no-RP group, and increased CD4+ T-cell quantity and reduced C-reactive protein (CRP) level were observed after effective steroid therapy [2][3]. Clinically, higher neutrophil-lymphocyte ratio (NLR) has been used as a biomarker of systemic inflammation, and it is relevant to the poor prognosis of cancer patients [4]. For stage III non-small-cell lung cancer (NSCLC) patients with radiological RP, NLR was used to predict subsequent progression to symptomatic RP, although their lymphocyte counts were not significantly different initially [5][4].

In addition to RP, a study revealed that the frequency of Th17 cells increased after irradiation, which was associated with PF in mice. The activation of the IL-6/TGF-β/IL-17 signaling pathway is involved in radiation-induced severe fibrosis [6][7]. These results suggest that T-cell differentiation and proliferation are altered dynamically during the development of RILI. With the development of single-cell RNA sequencing (scRNA-seq) technology, comprehensive human single-cell landscapes have been constructed, especially for lung immune and collagen-producing lung cells [8][9]. scRNA-seq, a central genome-wide sequencing method to portray cellular identities, is capable of exploring the differentiation procedure of key immune cells and distinguishing the source of important cytokines or proteins in RILI [10].

2. Cytokines and Proteins

As described in Table 1, cytokines and proteins play essential roles in the process of lung damage. Owing to the convenience of blood sample collection, blood testing has become the most promising method to identify RILI risk [11][12]. In this review, relevant molecular factors of lung toxicities were divided into four categories according to their functions, including inflammation-related factors, fibrosis-related factors, chemokines, and other proteins (Table 1).

Table 1. Potential biomarkers for monitoring radiation-induced lung injury.

Categories Biomarkers Function Correlation Research Ref.
Immune cells T-cell subsets T cells determine the specificity of immune responses in tissue inflammation, autoimmunity and host defense Decreased lymphocytes predicted the severity of RP in LC patients [2][3][6][7]
NLR NLR is an important biomarker of inflammatory status and disease exacerbation Higher NLR in NSCLC patients with radiological RP predicted the development of symptomatic RP [5][4]
Inflammation-related factors IL-1β IL-1β promotes the recruitment of inflammatory cells and the release of chemokines IL-1β level was a significant initiator of RILI both in vivo and in vitro studies [13][14]
IL-6 IL-6 regulates cells proliferation and differentiation, hematopoiesis, angiogenesis and immune reactions IL-6 level was a potential monitor for RILI development clinically [15][16][17]
IL-10 IL-10 is an anti-inflammatory cytokine by blocking the production of pro-inflammatory cytokines and inhibiting the capabilities of antigen-presenting cells IL-10 level was low throughout the irradiation period in RP patients, various IL-10 levels monitored different RP scales [18]
CRP CRP is an acute phase inflammatory protein and elevated after injury, infection or inflammation CRP level in plasma was a potential predictor for RILI development in LC patients [2]
IL-8 IL-8 has an anti-inflammatory effect and mediates pulmonary fibrosis Lower pre-IL-8 level predicted higher risk of grade 2 RILI in LC patients [19][20][21]
Fibrosis-related factors TGF-β TGF-β promotes the differentiation of fibroblasts into myofibroblasts and synthesis of ECM proteins, and reduces collagen degradation, leading to lung fibrosis Higher TGF-β1 in plasma monitored symptomatic RILI both in vivo and in vitro studies [22][21]
ET-1 ET-1 inhibits the proliferation and migration of endothelial cells and promotes ECM production ET-1 monitored the dynamic changes of PF in mice [23][24]
KL-6 KL-6 has chemotactic and anti-apoptotic effects on fibroblasts, leading to lung fibrosis Increased KL-6 level monitored PF activity and predicted RP severity in patients [25][26][27]
PAI-1 PAI-1 inhibits the plasmin system through blocking fibrinolysis and degradation of the ECM PAI-1 level predicted PF development in patients [28][29][30]
Chemokines CCL2/MCP-1 CCL2, also called MCP-1, is a potent chemokine for monocytes Lower CCL2 level monitored patients with grade 2 RP [16][21][31]
Other proteins IFN-γ IFN-γ is a pleiotropic cytokine with antitumor, antiviral, antibacterial, pro-inflammatory and antifibrotic properties IFN-γ level indicated the ability to attenuate fibrosis formation in patients [29][32]
SP-D SP-D works in host defense and regulates immune responses and lung phospholipid levels Elevated SP-D is a sensitive biomarker for early RILI prediction both in patients and murine models [33][34][35]
miRNAs miR-21 BMSCs inhibit the pro-inflammatory pathway of macrophage 1 in a miR-21 dependent manner miR-21 over-expressed in BMSCs significantly alleviated alveolitis in RILI rats [36]
miR-140 miR-140 protects lung tissue from fibrosis through blocking TGF-β1 signaling and inhibiting myofibroblast differentiation Loss of miR-140 in the lung tissue is a key risk factor for PF murine [37]

Abbreviations: RILI: Radiation-induced lung injury; RP: Radiation pneumonitis; LC: Lung cancer; NSCLC: Non-small-cell lung cancer; NLR: Neutrophil-lymphocyte ratio; TGF: Transforming growth factors; IL: Interleukins; CRP: C-reactive protein; PTX3: Pentraxins 3; ET-1: Endothelin-1; KL-6: Krebs von den Lungen-6; IFN: Interferons; ECM: Extracellular matrix; CCL2: Chemokine C-C motif ligand 2; MCP-1: Monocyte chemoattractant protein-1; PAI-1: Plasminogen activator inhibitor-1; EMT: Epithelial-mesenchymal transition; SP-D: surfactant protein D; PF: Pulmonary fibrosis; BMSCs: Bone marrow mesenchymal stem cells.

Inflammation-related factors are involved in acute or chronic inflammatory responses. TNF-α is the main initiator of the pro-inflammatory cascade by activating the expression of transcription factors, intercellular adhesion molecules, and numerous acute phase proteins. TNF-α also promotes fibroblast growth and collagen deposition [38][39]. Overproduction of TNF-α after irradiation has been well documented to be correlated with early cell apoptosis and latent lung function damage [40]. Augmented levels of TNF-α in the plasma were observed after radiotherapy. Although TNF-α level is related to RP, it failed to be used as a predictor in a previous study [41]. As another vital pro-inflammatory cytokine in human diseases, IL-1β can promote the recruitment of inflammatory cells by inducing the expression of adhesion molecules on endothelial cells and enhancing chemokine release [13]. The level of IL-1β was significantly elevated after thoracic irradiation both in vivo and in vitro; this could trigger the production of TGF-β and IL-6, which are involved in fibroblast proliferation and interstitial cell infiltration [14].

IL-6 plays a critical role in regulating lymphocyte proliferation and differentiation and participates in acute phase responses and immune hematopoiesis. Overexpression of IL-6 was detected clinically in the earlier phase of lung toxicity, which is closely related to the development of RP [15][16]. Nonetheless, it is still controversial whether IL-6 is a predictor of RILI because of its non-specific effects on inflammation [17]. IL-10 functions as an anti-inflammatory cytokine by suppressing the production of pro-inflammatory cytokines, including IL-6, and inhibiting the capabilities of antigen-presenting cells. Persistent low levels of IL-10 were found in RP patients throughout the radiotherapy period, and varied IL-10 concentrations were detected among different RP scales [18]. Moreover, the level of another inflammatory factor, CRP, was found to be higher at the onset of RP than in the no-RP group in lung cancer patients [2]. CRP has a prognostic value in disease severity and is associated with adverse outcomes in patients with lung infections. CRP, combined with other relevant factors, is a potential predictor of radiation toxicity [42][43].

As the most important pro-fibrotic factor, TGF-β1 promotes the differentiation of fibroblasts into myofibroblasts and the synthesis of ECM proteins [22]. Its central role in fibrosis progression is summarized in Section 2. Numerous studies have confirmed that plasma TGF-β1 levels are significantly correlated with both pulmonary and non-pulmonary radiation toxicity in patients after radiotherapy [44][45][46]. It was validated that higher levels of TGF-β1 and lower baseline levels of IL-8 were significantly associated with an increased grade ≥ 2 risk of RILI in NSCLC patients treated with definitive radiotherapy [21]. IL-8, an anti-inflammatory cytokine that is associated with symptomatic inflammatory responses, induces lung fibrosis by augmenting the mesenchymal cell population and recruiting more activated macrophages [19]. In addition, IL-4 and IL-13 play key roles in the adaptive immune response, and are both Th2-derived pro-fibrotic cytokines. In rat models, IL-4 levels increased with time after irradiation, leading to type I and III collagen formation in fibroblasts [47]. Both IL-4 and IL-13 can promote fibrosis by upregulating the expression of cell surface β1 integrin and VCAM-1 and simulating M2 macrophage polarization [48][49].

Although excessive ECM deposition is crucial in lung fibrosis, ECM initially contributes to wound healing of damaged lung parenchyma by binding cytokines and growth factors, such as platelet-derived growth factors (PDGFs) [50]. PDGFs are released from the endothelium, macrophages, or platelets, which can accelerate tissue repair by stimulating cell proliferation and ECM synthesis [51]. PDGF receptor α (PDGFR-α) is transactivated by TGF-β1 and is involved in tissue fibrosis. High levels of PDGF/PDGFR have been observed in lung, liver, kidney, and heart fibrosis [52]. Moreover, endothelin-1 (ET-1) is present downstream of TGF-β1. On the one hand, ET-1 can inhibit the proliferation and migration of endothelial cells, while on the other hand it promotes the expression of fibrosis-associated genes, such as plasminogen activator inhibitor-1 (PAI-1) [23]. ET-1 inhibition prolonged the survival of patients with idiopathic pulmonary fibrosis (IPF) [24]. In irradiated mice, serum ET-1 levels were obviously increased in the early stage, potentially indicating dynamic changes in lung injury.

In addition, the TGF-β-related protein Krebs von den Lungen-6 (KL-6/MUC1) has chemotactic and anti-apoptotic effects on fibroblasts. The serum level of KL-6/MUC1 reflects the severity of interstitial lung disease associated with connective tissue disease [26][27]. KL-6 is produced by epithelial cells, especially AEC II, and is released from these damaged cells following irradiation. It was reported that serum KL-6 levels increased almost in line with the occurrence of grade ≥2 RP and decreased after steroid administration in NSCLC patients [25]. Moreover, surfactants secreted by type II pneumocytes are vital for maintaining alveolar structure and function. The increased club cell secretory protein/surfactant protein D (CCSP/SP-D) ratio in plasma was positively correlated with fibrosis development and was detected early after radiation exposure in a murine model [33][34]. SP-D functions in host defense and regulates immune responses and lung phospholipid levels [53]. Previous studies have suggested that circulating SP-D levels were elevated in RP patients, which may be a sensitive and useful biomarker for early RP prediction [35].

Chemokines are associated with the migration of immune cells in response to infection or inflammation [54]. Chemokine C-C motif ligand 2 (CCL2), also known as monocyte chemoattractant protein-1 (MCP-1), is a potent chemokine for monocytes and contributes to lung pneumonitis and fibrosis [31]. The CCL2 level in the plasma was significantly lower in patients with grade 2 RP [16][21]. Furthermore, using high-throughput detection methods, the bronchoalveolar lavage fluid (BALF) of NSCLC patients was analyzed. The results showed that several cytokines, including C-X-C motif chemokine ligand 1 (CXCL-1), PAI-1, and IFN-γ, were upregulated in grade ≥ 3 RP patients [29]. Among them, CXCL-1 is a remarkable neutrophil chemoattractant and is involved in angiogenesis and inflammation. PAI-1 inhibits the plasmin system by blocking fibrinolysis and degradation of the ECM, and plays an important role in the development of PF [28][30]. IFN-γ is a pleiotropic cytokine with antitumor, antiviral, antibacterial, pro-inflammatory, and antifibrotic properties [32]. IFN-γ secreted by Th1 cells can inhibit Th2 cell differentiation and Th2-derived cytokine expression (IL-4 and IL-13), which further attenuates fibrosis formation by restricting fibroblast proliferation and reducing excessive collagen production [55].

3. MicroRNAs

MicroRNAs (miRNAs) are single-stranded, highly conservative small noncoding RNAs [56] involved in the regulation of gene expression, transcription, translation, and epigenetic modification; miRNAs have been studied in various fields, including disease diagnostics and cancer therapeutics [57][58][59]. The relationship between miRNAs and radiosensitivity or radiotoxicity has been reported in recent years. MiR-18-5p was reported to be a potential target for improving radiosensitivity in lung cancer by regulating the ataxia telangiectasia mutated (ATM) gene and hypoxia-inducible factor 1 alpha (HIF-1α) gene [60]. Additionally, overexpression of miR-26b-5p inhibited the expression of activating transcription factor 2 (ATF2) gene, which resulted in enhanced radiosensitivity of A549 lung adenocarcinoma cells [61].

During the acute phase after irradiation, the lower levels of miR-21 were related to a higher incidence and grade of RILI in patients by increasing the expression of IL-6 and TNF-α [36]. Similarly, another key protective molecule, miR-140, protected normal lung tissue from fibrosis by blocking TGF-β1 signaling and inhibiting myofibroblast differentiation [37]. Decreased levels of circulating miR-29a-3p and miR-150-5p in secreted exosomes were correlated with the delivered RT dose, and miR-29a might be useful biomarkers for lung fibrosis after irradiation [62]. Prominent changes in systemic miRNA profiles were observed within the early period after radiation exposure; miR-34b-3p, -96-5p, and -802-5p were identified to be associated with the TGF-β/SMAD signaling in C57BL/6 mice [63]. MiRNAs are stable in tissues or plasma and can be easily detected. Therefore, it is worthwhile to explore the value of circulating miRNA signatures for monitoring RILI.

4. Genetic Characteristics

Clinically, there is great variability among cancer patients in response to radiotherapy. Therefore, it is possible that the genetic characteristics of individuals are significantly associated with RILI occurrence [64][65]. Single-nucleotide polymorphisms (SNPs) have been considered hotspots in the development of RILI. A previous review summarized several SNPs in DNA repair-, inflammation-, angiogenesis-, and stress response-related genes that were involved in the underlying mechanisms of RP [66]. New discoveries continue to enrich the contents of SNPs related to RILI, and the latest findings are reviewed in this paper in Table 2.

Table 2. SNPs in genes associated with radiation-induced lung injury.

SNPs Year of Publication Gene Function Correlation Research Ref.
TOPBP1: rs1051772 2016 DNA repair decreased risk of RP in NSCLC patients [67]
MTHFR: rs1801131 2017 DNA repair decreased risk of grade ≥ 2 RP in esophageal squamous cell carcinoma patients [68]
NEIL1: rs4462560 2021 DNA repair decreased risk of grade ≥ 2 RP in LC patients [69]
NEIL1: rs7402844 2021 DNA repair higher risk of grade ≥ 2 RP in LC patients [69]
PI3CA: rs9838117
AKT2: rs33933140, rs11880261
2016 Inflammation higher risk of grade ≥ 3 RP in LC patients [70]
IL4: rs2243250 2019 Inflammation higher risk of grade ≥ 3 RP in LC patients [71]
ATG16L2: rs10898880 2018 Autophagy higher risk of RP in NSCLC patients [72]
PAI-1: rs7242 2017 Plasmin system inhibition higher risk of grade ≥ 3 RP in LC patients [28]
ITGB6: rs4665162 2016 Cell surface adhesion higher risk of grade ≥ 2 RP in LC patients [73]
MMP-1: rs1144393 2018 Protein degradation higher risk of grade ≥ 2 RILI in LC patients [74]
HIPK2: rs2030712 2020 Cell apoptosis, proliferation and DNA repair higher risk of grade ≥ 2 RP in LC patients [75]

Abbreviations: SNPs: Single-nucleotide polymorphisms; RILI: Radiation-induced lung injury; RP: Radiation pneumonitis; LC: Lung cancer; NSCLC: Non-small-cell lung cancer; TOPBP1: Topoisomerase DNA binding II binding protein 1; MTHFR: Methylenetetrahydrofolate reductase; NEIL1: Nei endonuclease VIII-like 1; PI3CA: Phosphatidylinositol-4,5-bisphosphate 3-kinase catalytic subunit alpha; AKT2: AKT serine/threonine kinase 2; IL4: Interleukins 4; ATG16L2: Autophagy related 16 Like 2; PAI-1: Plasminogen activator inhibitor-1; ITGB6: integrin beta6 subunit; MMP-1: Matrix metalloproteinase-1; HIPK2: Homeodomain interacting protein kinase 2.

Among the DNA repair-related genes, the SNP rs1051772 of topoisomerase DNA binding II binding protein 1 (TOPBP1) gene was found to be associated with a decreased risk of RP in NSCLC patients through DNA replication checkpoint control and genomic stability maintenance [67][76], and SNP rs1801131 of the methylenetetrahydrofolate reductase (MTHFR) gene was reported to be statistically correlated with grade ≥2 RP among esophageal squamous cell carcinoma patients in the Chinese Han population [68]. Nei endonuclease VIII-like 1 (NEIL1) is a bifunctional enzyme in the base excision repair (BER) pathway. Genetic variants (rs4462560 and rs7402844) of NEIL1 gene can serve as independent biomarkers for predicting RP in patients treated with thoracic radiotherapy through regulation of NEIL1 expression [69]. Moreover, the inflammation-related gene IL4: rs2243250 was validated as a potential predictor of severe injury due to its high correlation with grade ≥ 3 RP in lung cancer patients [71]. The variant of autophagy-related gene autophagy related 16 Like 2 (ATG16L2) could predict the RP risk and better prognosis in NSCLC patients treated with radiotherapy, either with or without chemotherapy [72].

For stress response-related genes, the association between the glutathione S-transferase-P1 (GSTP1) Ile105Val polymorphism and the risk of RP was observed in lung cancer patients of the Chinese population [77]. The GSTP1 gene abundantly expresses glutathione S-transferase (GST), a detoxification enzyme that protects against radiation-induced oxidative damage [78]. In addition, homeodomain-interacting protein kinase 2 (HIPK2) is a member of the serine/threonine kinase family, and there is a clearly increased risk of RP in lung cancer patients with the CC genotype of HIPK2: rs2030712 after radiotherapy [75]. A team has systematically investigated a series of genes relevant to RP in lung cancer patients, and found that the SNP rs4665162 of integrin beta6 subunit (ITGB6) gene, rs1144393 in matrix metalloproteinase-1 (MMP-1) gene, and three SNPs in the phosphatidylinositol 3-kinase (PI3K)/AKT pathway (PI3CA: rs9838117, AKT2: rs33933140 and rs11880261) were associated with higher RP risk [70][73][74]. Among them, the PI3K/AKT pathway is an important downstream pathway of TGF-β involved in the pathogenesis of inflammation and fibrosis diseases [79][80]. Although the clinical application of the above potential markers of SNPs in genes requires further prospective studies, SNPs are still a potential strategy for selecting high-risk patients for radiotherapy toxicity.

5. Imaging Based Biomarkers and Others

As there is a latency between radiotherapy and symptomatic lung toxicity, changes in the lung can be detected by advanced imaging technologies. Some non-invasive biomarkers are under investigation for early diagnosis of RILI. For thoracic tumor patients after radiotherapy, studies showed that vascular damage led to the reduction of regional lung perfusion. By using two functional single-photon emission computed tomography (SPECT) probes, regional pulmonary perfusion and pulmonary cell death were measured in the same irradiated rat model. The results demonstrated that the decrease of perfused volume of the lung was closely associated with lung tissue damage [81][82]. Especially in patients with RP, perfusion reduction was found more serious in high dose regions than those without RP with the performance of SPECT/CT [83]. Besides lung perfusion, alterations in pulmonary vascular resistance and permeability are also potential indicators of lung injury. A whole body contrast enhanced dynamic near-infrared fluorescence imaging was recently carried out in a rat model to track lung vascular permeability after acute RILI [84].

In addition, pre-treatment [18F]-2-fluoro-2-deoxyglucose positron emission tomography (FDG PET) imaging has also been investigated to predict RILI in several studies. Petit et al. firstly evaluated the correlation between symptomatic RP and pre-treatment FDG PET evidence of pulmonary inflammation. This retrospective study found that the 95th percentile of the standard uptake value (SUV95) within the lungs was potentially a predictor of RP on multivariate analysis [85]. The value of SUV95 for assessing lung toxicity was similarly validated by the treatment modality of the SBRT technique [86]. Through quantitative assessment of FDG PET/CT imaging before and after radiation therapy in stage III NSCLC patients, a pilot study suggested that global lung parenchymal glycolysis and lung parenchymal SUVmean may serve as potentially useful biomarkers to lung inflammation after thoracic radiation therapy [87]. Moreover, based on pretreatment planning CT in patients after SBRT delivery, the radiomic predictive model of lung volume irradiated with more than 5 Gy (LV5) was considered the best for RP estimation than the DVH model [88]. By the combination use of cone-beam CT radiomics features (NGTDM25: Contras and others) and two pretreatment CT radiomics features (SHAPE: Mass and SHAPE: Orientation), the prediction specificity of lung toxicity was further improved from 80.77% to 84.62% after SBRT in stage I NSCLC patients [89]. Therefore, it may contribute to the discovery of more convenient methods to predict RILI for patients with the development of noninvasive molecular imaging.

References

  1. Zhou, P.; Chen, L.; Yan, D.; Huang, C.; Chen, G.; Wang, Z.; Zhong, L.; Luo, W.; Chen, D.; Chun, C.; et al. Early variations in lymphocytes and T lymphocyte subsets are associated with radiation pneumonitis in lung cancer patients and experimental mice received thoracic irradiation. Cancer Med. 2020, 9, 3437–3444.
  2. Bai, L.; Zhou, B.S.; Zhao, Y.X. Dynamic changes in T-cell subsets and C-reactive protein after radiation therapy in lung cancer patients and correlation with symptomatic radiation pneumonitis treated with steroid therapy. Cancer Manag. Res. 2019, 11, 7925–7931.
  3. Alam, R.; Gorska, M. 3. Lymphocytes. J. Allergy Clin. Immunol. 2003, 111, S476–S485.
  4. Templeton, A.J.; McNamara, M.G.; Seruga, B.; Vera-Badillo, F.E.; Aneja, P.; Ocana, A.; Leibowitz-Amit, R.; Sonpavde, G.; Knox, J.J.; Tran, B.; et al. Prognostic role of neutrophil-to-lymphocyte ratio in solid tumors: A systematic review and meta-analysis. J. Natl. Cancer Inst. 2014, 106, dju124.
  5. Lee, Y.H.; Choi, H.S.; Jeong, H.; Kang, K.M.; Song, J.H.; Lee, W.S.; Lee, G.W.; Song, H.N.; Kim, H.G.; Kang, M.H.; et al. Neutrophil-lymphocyte ratio and a dosimetric factor for predicting symptomatic radiation pneumonitis in non-small-cell lung cancer patients treated with concurrent chemoradiotherapy. Clin. Respir. J. 2018, 12, 1264–1273.
  6. Paun, A.; Bergeron, M.E.; Haston, C.K. The Th1/Th17 balance dictates the fibrosis response in murine radiation-induced lung disease. Sci. Rep. 2017, 7, 11586.
  7. Miossec, P.; Kolls, J.K. Targeting IL-17 and TH17 cells in chronic inflammation. Nat. Rev. Drug Discov. 2012, 11, 763–776.
  8. Han, X.; Zhou, Z.; Fei, L.; Sun, H.; Wang, R.; Chen, Y.; Chen, H.; Wang, J.; Tang, H.; Ge, W.; et al. Construction of a human cell landscape at single-cell level. Nature 2020, 581, 303–309.
  9. Tsukui, T.; Sun, K.H.; Wetter, J.B.; Wilson-Kanamori, J.R.; Hazelwood, L.A.; Henderson, N.C.; Adams, T.S.; Schupp, J.C.; Poli, S.D.; Rosas, I.O.; et al. Collagen-producing lung cell atlas identifies multiple subsets with distinct localization and relevance to fibrosis. Nat. Commun. 2020, 11, 1920.
  10. Bagnoli, J.W.; Ziegenhain, C.; Janjic, A.; Wange, L.E.; Vieth, B.; Parekh, S.; Geuder, J.; Hellmann, I.; Enard, W. Sensitive and powerful single-cell RNA sequencing using mcSCRB-seq. Nat. Commun. 2018, 9, 2937.
  11. Squillaro, T.; Finicelli, M.; Alessio, N.; Del Gaudio, S.; Di Bernardo, G.; Melone, M.A.B.; Peluso, G.; Galderisi, U. A rapid, safe, and quantitative in vitro assay for measurement of uracil-DNA glycosylase activity. J. Mol. Med. 2019, 97, 991–1001.
  12. Wu, D.; Waalkes, A.; Penewit, K.; Salipante, S.J. Ultrasensitive Detection of Chimerism by Single-Molecule Molecular Inversion Probe Capture and High-Throughput Sequencing of Copy Number Deletion Polymorphisms. Clin. Chem. 2018, 64, 938–949.
  13. Gabay, C.; Lamacchia, C.; Palmer, G. IL-1 pathways in inflammation and human diseases. Nat. Rev. Rheumatol. 2010, 6, 232–241.
  14. Zhang, C.; Zeng, W.; Yao, Y.; Xu, B.; Wei, X.; Wang, L.; Yin, X.; Barman, A.K.; Zhang, F.; Zhang, C.; et al. Naringenin Ameliorates Radiation-Induced Lung Injury by Lowering IL-1beta Level. J. Pharmacol. Exp. Ther. 2018, 366, 341–348.
  15. Deng, Y.; Qiu, T.; Patel, N.; Zhou, S.; Xue, T.; Zhang, H. Clinical Management of Risk of Radiation Pneumonia with Serum Markers During the Radiotherapy for Patients with Thoracic Malignant Tumors. Cancer Manag. Res. 2019, 11, 10249–10256.
  16. Siva, S.; MacManus, M.; Kron, T.; Best, N.; Smith, J.; Lobachevsky, P.; Ball, D.; Martin, O. A pattern of early radiation-induced inflammatory cytokine expression is associated with lung toxicity in patients with non-small cell lung cancer. PLoS ONE 2014, 9, e109560.
  17. Kong, F.M.; Ao, X.; Wang, L.; Lawrence, T.S. The use of blood biomarkers to predict radiation lung toxicity: A potential strategy to individualize thoracic radiation therapy. Cancer Control 2008, 15, 140–150.
  18. Arpin, D.; Perol, D.; Blay, J.Y.; Falchero, L.; Claude, L.; Vuillermoz-Blas, S.; Martel-Lafay, I.; Ginestet, C.; Alberti, L.; Nosov, D.; et al. Early variations of circulating interleukin-6 and interleukin-10 levels during thoracic radiotherapy are predictive for radiation pneumonitis. J. Clin. Oncol. 2005, 23, 8748–8756.
  19. Yang, L.; Herrera, J.; Gilbertsen, A.; Xia, H.; Smith, K.; Benyumov, A.; Bitterman, P.B.; Henke, C.A. IL-8 mediates idiopathic pulmonary fibrosis mesenchymal progenitor cell fibrogenicity. Am. J. Physiol. Lung Cell Mol. Physiol. 2018, 314, L127–L136.
  20. Yu, H.; Wu, H.; Wang, W.; Jolly, S.; Jin, J.Y.; Hu, C.; Kong, F.S. Machine Learning to Build and Validate a Model for Radiation Pneumonitis Prediction in Patients with Non-Small Cell Lung Cancer. Clin. Cancer Res. 2019, 25, 4343–4350.
  21. Wang, S.; Campbell, J.; Stenmark, M.H.; Zhao, J.; Stanton, P.; Matuszak, M.M.; Ten Haken, R.K.; Kong, F.S. Plasma Levels of IL-8 and TGF-beta1 Predict Radiation-Induced Lung Toxicity in Non-Small Cell Lung Cancer: A Validation Study. Int. J. Radiat. Oncol. Biol. Phys. 2017, 98, 615–621.
  22. Kim, H.; Park, S.H.; Han, S.Y.; Lee, Y.S.; Cho, J.; Kim, J.M. LXA4-FPR2 signaling regulates radiation-induced pulmonary fibrosis via crosstalk with TGF-beta/Smad signaling. Cell Death Dis. 2020, 11, 653.
  23. Castanares, C.; Redondo-Horcajo, M.; Magan-Marchal, N.; ten Dijke, P.; Lamas, S.; Rodriguez-Pascual, F. Signaling by ALK5 mediates TGF-beta-induced ET-1 expression in endothelial cells: A role for migration and proliferation. J. Cell Sci. 2007, 120, 1256–1266.
  24. Shi-wen, X.; Kennedy, L.; Renzoni, E.A.; Bou-Gharios, G.; du Bois, R.M.; Black, C.M.; Denton, C.P.; Abraham, D.J.; Leask, A. Endothelin is a downstream mediator of profibrotic responses to transforming growth factor beta in human lung fibroblasts. Arthritis Rheum. 2007, 56, 4189–4194.
  25. Iwata, H.; Shibamoto, Y.; Baba, F.; Sugie, C.; Ogino, H.; Murata, R.; Yanagi, T.; Otsuka, S.; Kosaki, K.; Murai, T.; et al. Correlation between the serum KL-6 level and the grade of radiation pneumonitis after stereotactic body radiotherapy for stage I lung cancer or small lung metastasis. Radiother. Oncol. 2011, 101, 267–270.
  26. Ishikawa, N.; Hattori, N.; Yokoyama, A.; Kohno, N. Utility of KL-6/MUC1 in the clinical management of interstitial lung diseases. Respir. Investig. 2012, 50, 3–13.
  27. Lee, J.S.; Lee, E.Y.; Ha, Y.J.; Kang, E.H.; Lee, Y.J.; Song, Y.W. Serum KL-6 levels reflect the severity of interstitial lung disease associated with connective tissue disease. Arthritis Res. Ther. 2019, 21, 58.
  28. Ghosh, A.K.; Vaughan, D.E. PAI-1 in tissue fibrosis. J. Cell Physiol. 2012, 227, 493–507.
  29. Aso, S.; Navarro-Martin, A.; Castillo, R.; Padrones, S.; Castillo, E.; Montes, A.; Martinez, J.I.; Cubero, N.; Lopez, R.; Rodriguez, L.; et al. Severity of radiation pneumonitis, from clinical, dosimetric and biological features: A pilot study. Radiat. Oncol. 2020, 15, 246.
  30. Shioya, S.; Masuda, T.; Senoo, T.; Horimasu, Y.; Miyamoto, S.; Nakashima, T.; Iwamoto, H.; Fujitaka, K.; Hamada, H.; Hattori, N. Plasminogen activator inhibitor-1 serves an important role in radiation-induced pulmonary fibrosis. Exp. Ther. Med. 2018, 16, 3070–3076.
  31. Klein, D.; Schmetter, A.; Imsak, R.; Wirsdorfer, F.; Unger, K.; Jastrow, H.; Stuschke, M.; Jendrossek, V. Therapy with Multipotent Mesenchymal Stromal Cells Protects Lungs from Radiation-Induced Injury and Reduces the Risk of Lung Metastasis. Antioxid. Redox Signal. 2016, 24, 53–69.
  32. Vu, T.N.; Chen, X.; Foda, H.D.; Smaldone, G.C.; Hasaneen, N.A. Interferon-gamma enhances the antifibrotic effects of pirfenidone by attenuating IPF lung fibroblast activation and differentiation. Respir. Res. 2019, 20, 206.
  33. Gamez, A.S.; Gras, D.; Petit, A.; Knabe, L.; Molinari, N.; Vachier, I.; Chanez, P.; Bourdin, A. Supplementing defect in club cell secretory protein attenuates airway inflammation in COPD. Chest 2015, 147, 1467–1476.
  34. Groves, A.M.; Williams, J.P.; Hernady, E.; Reed, C.; Fenton, B.; Love, T.; Finkelstein, J.N.; Johnston, C.J. A Potential Biomarker for Predicting the Risk of Radiation-Induced Fibrosis in the Lung. Radiat. Res. 2018, 190, 513–525.
  35. Sasaki, R.; Soejima, T.; Matsumoto, A.; Maruta, T.; Yamada, K.; Ota, Y.; Kawabe, T.; Nishimura, H.; Sakai, E.; Ejima, Y.; et al. Clinical significance of serum pulmonary surfactant proteins a and d for the early detection of radiation pneumonitis. Int. J. Radiat. Oncol. Biol. Phys. 2001, 50, 301–307.
  36. Bao, E.T.; Zhao, W.G.; Mou, M.; Liu, X.F. MicroRNA-21 mediates bone marrow mesenchymal stem cells protection of radiation-induced lung injury during the acute phase by regulating polarization of alveolar macrophages. Transl. Cancer Res. 2020, 9, 231–239.
  37. Duru, N.; Zhang, Y.; Gernapudi, R.; Wolfson, B.; Lo, P.K.; Yao, Y.; Zhou, Q. Loss of miR-140 is a key risk factor for radiation-induced lung fibrosis through reprogramming fibroblasts and macrophages. Sci. Rep. 2016, 6, 39572.
  38. Luo, Y.; Wang, M.; Pang, Z.; Jiang, F.; Chen, J.; Zhang, J. Locally instilled tumor necrosis factor alpha antisense oligonucleotide contributes to inhibition of TH2-driven pulmonary fibrosis via induced CD4+ CD25+ Foxp3+ regulatory T cells. J. Gene Med. 2013, 15, 441–452.
  39. Refahi, S.; Pourissa, M.; Zirak, M.R.; Hadadi, G. Modulation expression of tumor necrosis factor alpha in the radiation-induced lung injury by glycyrrhizic acid. J. Med. Phys. 2015, 40, 95–101.
  40. Zhang, M.; Qian, J.; Xing, X.; Kong, F.M.; Zhao, L.; Chen, M.; Lawrence, T.S. Inhibition of the tumor necrosis factor-alpha pathway is radioprotective for the lung. Clin. Cancer Res. 2008, 14, 1868–1876.
  41. Li, B.; Chen, S.H.; Lu, H.J.; Tan, Y. Predictive values of TNF-alpha, IL-6, IL-10 for radiation pneumonitis. Int. J. Radiat. Res. 2016, 14, 173–179.
  42. Luo, X.; Zhou, W.; Yan, X.; Guo, T.; Wang, B.; Xia, H.; Ye, L.; Xiong, J.; Jiang, Z.; Liu, Y.; et al. Prognostic Value of C-Reactive Protein in Patients With Coronavirus 2019. Clin. Infect. Dis. 2020, 71, 2174–2179.
  43. Avan, A.; Tavakoly Sany, S.B.; Ghayour-Mobarhan, M.; Rahimi, H.R.; Tajfard, M.; Ferns, G. Serum C-reactive protein in the prediction of cardiovascular diseases: Overview of the latest clinical studies and public health practice. J. Cell Physiol. 2018, 233, 8508–8525.
  44. Anscher, M.S.; Marks, L.B.; Shafman, T.D.; Clough, R.; Huang, H.; Tisch, A.; Munley, M.; Herndon, J.E.; Garst, J.; Crawford, J.; et al. Risk of long-term complications after TFG-beta1-guided very-high-dose thoracic radiotherapy. Int. J. Radiat. Oncol. Biol. Phys. 2003, 56, 988–995.
  45. Zhao, L.; Sheldon, K.; Chen, M.; Yin, M.S.; Hayman, J.A.; Kalemkerian, G.P.; Arenberg, D.; Lyons, S.E.; Curtis, J.L.; Davis, M.; et al. The predictive role of plasma TGF-beta1 during radiation therapy for radiation-induced lung toxicity deserves further study in patients with non-small cell lung cancer. Lung Cancer 2008, 59, 232–239.
  46. Zhao, L.; Wang, L.; Ji, W.; Wang, X.; Zhu, X.; Hayman, J.A.; Kalemkerian, G.P.; Yang, W.; Brenner, D.; Lawrence, T.S.; et al. Elevation of plasma TGF-beta1 during radiation therapy predicts radiation-induced lung toxicity in patients with non-small-cell lung cancer: A combined analysis from Beijing and Michigan. Int. J. Radiat. Oncol. Biol. Phys. 2009, 74, 1385–1390.
  47. Aliasgharzadeh, A.; Farhood, B.; Amini, P.; Saffar, H.; Motevaseli, E.; Rezapoor, S.; Nouruzi, F.; Shabeeb, D.H.; Eleojo Musa, A.; Mohseni, M.; et al. Melatonin Attenuates Upregulation of Duox1 and Duox2 and Protects against Lung Injury following Chest Irradiation in Rats. Cell J. 2019, 21, 236–242.
  48. Rahal, O.M.; Wolfe, A.R.; Mandal, P.K.; Larson, R.; Tin, S.; Jimenez, C.; Zhang, D.; Horton, J.; Reuben, J.M.; McMurray, J.S.; et al. Blocking Interleukin (IL)4- and IL13-Mediated Phosphorylation of STAT6 (Tyr641) Decreases M2 Polarization of Macrophages and Protects Against Macrophage-Mediated Radioresistance of Inflammatory Breast Cancer. Int. J. Radiat. Oncol. Biol. Phys. 2018, 100, 1034–1043.
  49. Doucet, C.; Brouty-Boye, D.; Pottin-Clemenceau, C.; Canonica, G.W.; Jasmin, C.; Azzarone, B. Interleukin (IL) 4 and IL-13 act on human lung fibroblasts. Implication in asthma. J. Clin. Investig. 1998, 101, 2129–2139.
  50. Karsdal, M.A.; Nielsen, S.H.; Leeming, D.J.; Langholm, L.L.; Nielsen, M.J.; Manon-Jensen, T.; Siebuhr, A.; Gudmann, N.S.; Ronnow, S.; Sand, J.M.; et al. The good and the bad collagens of fibrosis—Their role in signaling and organ function. Adv. Drug Deliv. Rev. 2017, 121, 43–56.
  51. Klinkhammer, B.M.; Floege, J.; Boor, P. PDGF in organ fibrosis. Mol. Asp. Med. 2018, 62, 44–62.
  52. Bonner, J.C. Regulation of PDGF and its receptors in fibrotic diseases. Cytokine Growth Factor Rev. 2004, 15, 255–273.
  53. Munk, H.L.; Fakih, D.; Christiansen, L.; Tan, Q.; Christensen, A.F.; Ejstrup, L.; Loft, A.G.; Junker, K.; Kyvik, K.O.; Jounblat, R.; et al. Surfactant protein-D, a potential mediator of inflammation in axial spondyloarthritis. Rheumatology 2018, 57, 1861–1865.
  54. Sokol, C.L.; Luster, A.D. The chemokine system in innate immunity. Cold Spring Harb. Perspect. Biol. 2015, 7, a016303.
  55. Hu, X.; Ivashkiv, L.B. Cross-regulation of signaling pathways by interferon-gamma: Implications for immune responses and autoimmune diseases. Immunity 2009, 31, 539–550.
  56. Bushati, N.; Cohen, S.M. microRNA functions. Annu. Rev. Cell Dev. Biol. 2007, 23, 175–205.
  57. Chen, L.; Heikkinen, L.; Wang, C.; Yang, Y.; Sun, H.; Wong, G. Trends in the development of miRNA bioinformatics tools. Brief. Bioinform. 2019, 20, 1836–1852.
  58. Wang, X.; Wang, Y.; Dou, Y.; Chen, L.; Wang, J.; Jiang, N.; Guo, C.; Yao, Q.; Wang, C.; Liu, L.; et al. Degradation of unmethylated miRNA/miRNA*s by a DEDDy-type 3′ to 5′ exoribonuclease Atrimmer 2 in Arabidopsis. Proc. Natl. Acad. Sci. USA 2018, 115, E6659–E6667.
  59. Hu, Z.; Gao, S.; Lindberg, D.; Panja, D.; Wakabayashi, Y.; Li, K.; Kleinman, J.E.; Zhu, J.; Li, Z. Temporal dynamics of miRNAs in human DLPFC and its association with miRNA dysregulation in schizophrenia. Transl. Psychiatry 2019, 9, 196.
  60. Chen, X.; Wu, L.; Li, D.; Xu, Y.; Zhang, L.; Niu, K.; Kong, R.; Gu, J.; Xu, Z.; Chen, Z.; et al. Radiosensitizing effects of miR-18a-5p on lung cancer stem-like cells via downregulating both ATM and HIF-1alpha. Cancer Med. 2018, 7, 3834–3847.
  61. Han, F.; Huang, D.; Huang, X.; Wang, W.; Yang, S.; Chen, S. Exosomal microRNA-26b-5p down-regulates ATF2 to enhance radiosensitivity of lung adenocarcinoma cells. J. Cell. Mol. Med. 2020, 24, 7730–7742.
  62. Dinh, T.K.; Fendler, W.; Chalubinska-Fendler, J.; Acharya, S.S.; O’Leary, C.; Deraska, P.V.; D’Andrea, A.D.; Chowdhury, D.; Kozono, D. Circulating miR-29a and miR-150 correlate with delivered dose during thoracic radiation therapy for non-small cell lung cancer. Radiat. Oncol. 2016, 11, 61.
  63. Rogers, C.J.; Lukaszewicz, A.I.; Yamada-Hanff, J.; Micewicz, E.D.; Ratikan, J.A.; Starbird, M.A.; Miller, T.A.; Nguyen, C.; Lee, J.T.; Olafsen, T.; et al. Identification of miRNA signatures associated with radiation-induced late lung injury in mice. PLoS ONE 2020, 15, e0232411.
  64. Niu, H.; Shin, H.; Gao, F.; Zhang, J.; Bahamon, B.; Danaee, H.; Melichar, B.; Schilder, R.J.; Coleman, R.L.; Falchook, G.; et al. Aurora A Functional Single Nucleotide Polymorphism (SNP) Correlates With Clinical Outcome in Patients With Advanced Solid Tumors Treated With Alisertib, an Investigational Aurora A Kinase Inhibitor. EBioMedicine 2017, 25, 50–57.
  65. Kerns, S.L.; Dorling, L.; Fachal, L.; Bentzen, S.; Pharoah, P.D.; Barnes, D.R.; Gomez-Caamano, A.; Carballo, A.M.; Dearnaley, D.P.; Peleteiro, P.; et al. Meta-analysis of Genome Wide Association Studies Identifies Genetic Markers of Late Toxicity Following Radiotherapy for Prostate Cancer. EBioMedicine 2016, 10, 150–163.
  66. Guo, C.X.; Wang, J.; Huang, L.H.; Li, J.G.; Chen, X. Impact of single-nucleotide polymorphisms on radiation pneumonitis in cancer patients. Mol. Clin. Oncol. 2016, 4, 3–10.
  67. Zhao, L.; Pu, X.; Ye, Y.; Lu, C.; Chang, J.Y.; Wu, X. Association between Genetic Variants in DNA Double-Strand Break Repair Pathways and Risk of Radiation Therapy-Induced Pneumonitis and Esophagitis in Non-Small Cell Lung Cancer. Cancers 2016, 8, 23.
  68. Zhang, Y.; Li, Z.; Zhang, J.; Li, H.; Qiao, Y.; Huang, C.; Li, B. Genetic Variants in MTHFR Gene Predict ≥ 2 Radiation Pneumonitis in Esophageal Squamous Cell Carcinoma Patients Treated with Thoracic Radiotherapy. PLoS ONE 2017, 12, e0169147.
  69. Zheng, Y.; Zheng, L.; Yu, J.; Jiang, M.; Zhang, S.; Cai, X.; Zhu, M. Genetic variations in DNA repair gene NEIL1 associated with radiation pneumonitis risk in lung cancer patients. Mol. Genet. Genomic. Med. 2021, e1698.
  70. Tang, Y.; Liu, B.; Li, J.; Wu, H.; Yang, J.; Zhou, X.; Yi, M.; Li, Q.; Yu, S.; Yuan, X. Genetic variants in PI3K/AKT pathway are associated with severe radiation pneumonitis in lung cancer patients treated with radiation therapy. Cancer Med. 2016, 5, 24–32.
  71. Tang, Y.; Yang, L.; Qin, W.; Yi, M.; Liu, B.; Yuan, X. Validation study of the association between genetic variant of IL4 and severe radiation pneumonitis in lung cancer patients treated with radiation therapy. Radiother. Oncol. 2019, 141, 86–94.
  72. Wen, J.; Liu, H.; Wang, L.; Wang, X.; Gu, N.; Liu, Z.; Xu, T.; Gomez, D.R.; Komaki, R.; Liao, Z.; et al. Potentially Functional Variants of ATG16L2 Predict Radiation Pneumonitis and Outcomes in Patients with Non-Small Cell Lung Cancer after Definitive Radiotherapy. J. Thorac. Oncol. 2018, 13, 660–675.
  73. Yi, M.; Tang, Y.; Liu, B.; Li, Q.; Zhou, X.; Yu, S.; Fu, S.; Cai, Y.; Yuan, X. Genetic variants in the ITGB6 gene is associated with the risk of radiation pneumonitis in lung cancer patients treated with thoracic radiation therapy. Tumor Biol. 2016, 37, 3469–3477.
  74. Liu, B.; Yi, M.; Tang, Y.; Liu, Q.; Qiu, H.; Zou, Y.; Peng, P.; Zhang, L.; Hu, C.; Yuan, X. MMP-1 promoter polymorphism is associated with risk of radiation-induced lung injury in lung cancer patients treated with radiotherapy. Oncotarget 2016, 7, 70175–70184.
  75. Tang, Y.; Yang, L.; Qin, W.; Yi, M.X.; Liu, B.; Yuan, X. Impact of genetic variant of HIPK2 on the risk of severe radiation pneumonitis in lung cancer patients treated with radiation therapy. Radiat. Oncol. 2020, 15, 9.
  76. Bartek, J.; Mailand, N. TOPping up ATR activity. Cell 2006, 124, 888–890.
  77. Du, L.; Yu, W.; Huang, X.; Zhao, N.; Liu, F.; Tong, F.; Zhang, S.; Niu, B.; Liu, X.; Xu, S.; et al. GSTP1 Ile105Val polymorphism might be associated with the risk of radiation pneumonitis among lung cancer patients in Chinese population: A prospective study. J. Cancer 2018, 9, 726–735.
  78. Hayes, J.D.; Pulford, D.J. The glutathione S-transferase supergene family: Regulation of GST and the contribution of the isoenzymes to cancer chemoprotection and drug resistance. Crit. Rev. Biochem. Mol. Biol 1995, 30, 445–600.
  79. Kral-Pointner, J.B.; Schrottmaier, W.C.; Salzmann, M.; Mussbacher, M.; Schmidt, G.J.; Moser, B.; Heber, S.; Birnecker, B.; Paar, H.; Zellner, M.; et al. Platelet PI3K Modulates Innate Leukocyte Extravasation during Acid-Induced Acute Lung Inflammation. Thromb. Haemost. 2019, 119, 1642–1654.
  80. Villegas, S.N.; Gombos, R.; Garcia-Lopez, L.; Gutierrez-Perez, I.; Garcia-Castillo, J.; Vallejo, D.M.; Da Ros, V.G.; Ballesta-Illan, E.; Mihaly, J.; Dominguez, M. PI3K/Akt Cooperates with Oncogenic Notch by Inducing Nitric Oxide-Dependent Inflammation. Cell Rep. 2018, 22, 2541–2549.
  81. Zhang, J.; Ma, J.; Zhou, S.; Hubbs, J.L.; Wong, T.Z.; Folz, R.J.; Evans, E.S.; Jaszczak, R.J.; Clough, R.; Marks, L.B. Radiation-induced reductions in regional lung perfusion: 0.1–12 year data from a prospective clinical study. Int. J. Radiat. Oncol. Biol. Phys. 2010, 76, 425–432.
  82. Medhora, M.; Haworth, S.; Liu, Y.; Narayanan, J.; Gao, F.; Zhao, M.; Audi, S.; Jacobs, E.R.; Fish, B.L.; Clough, A.V. Biomarkers for Radiation Pneumonitis Using Noninvasive Molecular Imaging. J. Nucl. Med. 2016, 57, 1296–1301.
  83. Farr, K.P.; Khalil, A.A.; Moller, D.S.; Bluhme, H.; Kramer, S.; Morsing, A.; Grau, C. Time and dose-related changes in lung perfusion after definitive radiotherapy for NSCLC. Radiother. Oncol. 2018, 126, 307–311.
  84. Jagtap, J.; Audi, S.; Razeghi-Kondelaji, M.H.; Fish, B.L.; Hansen, C.; Narayan, J.; Gao, F.; Sharma, G.; Parchur, A.K.; Banerjee, A.; et al. A Rapid Dynamic In Vivo Near-Infrared Fluorescence Imaging Assay to Track Lung Vascular Permeability after Acute Radiation injury. Am. J. Physiol. Lung Cell Mol. Physiol. 2021, 320, L436–L450.
  85. Petit, S.F.; van Elmpt, W.J.; Oberije, C.J.; Vegt, E.; Dingemans, A.M.; Lambin, P.; Dekker, A.L.; De Ruysscher, D. [18F]fluorodeoxyglucose uptake patterns in lung before radiotherapy identify areas more susceptible to radiation-induced lung toxicity in non-small-cell lung cancer patients. Int. J. Radiat. Oncol. Biol. Phys. 2011, 81, 698–705.
  86. Chaudhuri, A.A.; Binkley, M.S.; Rigdon, J.; Carter, J.N.; Aggarwal, S.; Dudley, S.A.; Qian, Y.; Kumar, K.A.; Hara, W.Y.; Gensheimer, M.; et al. Pre-treatment non-target lung FDG-PET uptake predicts symptomatic radiation pneumonitis following Stereotactic Ablative Radiotherapy (SABR). Radiother. Oncol. 2016, 119, 454–460.
  87. Abdulla, S.; Salavati, A.; Saboury, B.; Basu, S.; Torigian, D.A.; Alavi, A. Quantitative assessment of global lung inflammation following radiation therapy using FDG PET/CT: A pilot study. Eur. J. Nucl. Med. Mol. Imaging 2014, 41, 350–356.
  88. Hirose, T.A.; Arimura, H.; Ninomiya, K.; Yoshitake, T.; Fukunaga, J.I.; Shioyama, Y. Radiomic prediction of radiation pneumonitis on pretreatment planning computed tomography images prior to lung cancer stereotactic body radiation therapy. Sci. Rep. 2020, 10, 20424.
  89. Qin, Q.; Shi, A.; Zhang, R.; Wen, Q.; Niu, T.; Chen, J.; Qiu, Q.; Wan, Y.; Sun, X.; Xing, L. Cone-beam CT radiomics features might improve the prediction of lung toxicity after SBRT in stage I NSCLC patients. Thorac. Cancer 2020, 11, 964–972.
More
Information
Subjects: Oncology
Contributor MDPI registered users' name will be linked to their SciProfiles pages. To register with us, please refer to https://encyclopedia.pub/register :
View Times: 516
Revisions: 2 times (View History)
Update Date: 26 Sep 2021
1000/1000
Video Production Service