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Eucommia ulmoides Oliver (E. ulmoides) is a popular medicinal herb and health supplement in China, Japan, and Korea, and has a variety of pharmaceutical properties. The neuroendocrine–immune (NEI) network is crucial in maintaining homeostasis and physical or psychological functions at a holistic level, consistent with the regulatory theory of natural medicine.
Disease | Compound | Model | Dosage | Effect | Mechanism | Ref. | |
---|---|---|---|---|---|---|---|
In Vitro | In Vivo | ||||||
Cancer | Chlorogenic acid | AGS cells | 0–2 mg/mL | Cytotoxicity | [45] | ||
Total flavonoids | GBMs cells lines U251, U87, HS683 and A172 and human normal cell HA | H22 tumor-bearing mice | 50–200 mg/kg | Inhibit tumor growth Radiosensitization Induce apoptosis |
Increase Bax expression and decrease in Bcl-2 expression; Decrease the ratio of Bcl-2/Bax and downregulate the expression of HIF-1α, MMP-2 as well as Wee1. |
[46][47] | |
Eucommicin A | iCSCL-10A-1, iCSCL-10A-2, MCF7, MDA-MB231 cells | 0–100 μM | Cytotoxicity, suppressed tumor sphere formation | [48] | |||
Pentacyclic triterpenoids (betulinic acid, lupeol, and 3-O-laurylbetulinic acid) | Hela, MDA-MB-231, and T47D cells | 3–80 μM | Inhibit tumor cell growth and induce apoptosis | Induce mitochondrial fragmentation and suppress lysosome production in Hela cells. | [49] | ||
Chlorogenic acid | HCT-116, LOVO | 600–1600 µg/mL | Inhibit proliferation and promote apoptosis | [50] | |||
Eucommia ulmoides Oliver leaf (EUL) extract | A549, SNU-C4, HeLa, | 25–200 µg/mL | Inhibit proliferation | [51] | |||
Total Polysaccharides | LLC, KMB-17 | 0.5–8.0 µg/mL | Induce apoptosis and inhibit proliferation | Activate Caspase-3 pathway. | [52] | ||
E. ulmoides extract | HCT116 | 500–800 mg/L | Cytotoxicity | [53] | |||
EUL extract and chlorogenic acid | HCT116, LOVO | 1600 µg/mL | Inhibit invasion and migration | [54] | |||
Alzheimer’s disease (AD) and Parkinson’s disease (PD) | Eucommia ulmoides Oliver bark (EUE) extract | Lipopolysaccharide (LPS)-stimulated BV-2 microglia 6-hydroxydopamine (6-OHDA)-induced SH-SY5Y cells |
2.5–100 μg/mL | Anti-inflammatory Anti-oxidative stress |
Inhibit phosphorylation of MAPKs, PI3K/Akt, and GSK-3β, suppress NF-κB activation and induce Nrf2-dependent HO-1 activation; Inhibit reactive oxygen species (ROS) production, mitochondrial dysfunction, and phosphorylation of JNK, PI3K/Akt and GSK-3β, thereby blocking NF-κB nuclear translocation. |
[55][56] | |
EUE extract | H2O2 -induced SH-SY5Y cells | Scopolamine-induced ICR mice | 5–20 μg/mL, 5–20 mg/kg |
Anti-cytotoxicity Enhance cholinergic signaling |
Inhibit cytotoxicity, reduce ROS accumulation, DNA condensation, MMP stabilization, regulate Bcl-2 family proteins, inhibit MAPKs and PI3K/Akt phosphorylation; Decrease the activity of AChE and TBARS, protect BDNF and activate CREB expression. |
[57][58] | |
EUE extract | MPTP-induced male C57BL/6J mice | 2.5–10 g/kg, 150–600 mg/kg |
Anti-neuroinflammationAnti-PD | Downregulate expression of p38, JNK, and Fosl2, reduce pro-inflammatory factors; Antagonize loss of striatal neurotransmitters and alleviate associated ambulatory motor abnormalities. |
[59][60] | ||
Betulin, wogonin, oroxylin A, geniposidic, aucubin |
MPP+-induced SH-SY5Y cells | 10 μM | Anti-PD | Ameliorate the ubiquitin-proteasome system. | [60] | ||
Geniposidic acid (GPA) | APP/PS1 mice and C57BL/6J mice | 25, 75 mg/kg | Anti-neuroinflammatory | Inhibit the activation of astrocytes and microglia, down-regulate the expression of pro-inflammatory cytokines and iNOS, upregulate the expression of anti-inflammatory cytokines and Arg-1, and block the TLR4/2-MyD88 signaling pathway by reducing the expression of HMGB-1. | [61] | ||
Macranthoin G | Hydrogen peroxide (H2O2)-induced PC12 cells | 6.25–50 μM | Anti-oxidative stress-mediated cellular injury Anti-PD and anti-AD |
Decrease MDA production and ROS levels, increase MMP, restore CAT, GSH-Px and SOD activity, and inhibit NF-κB pathway and activation of IκBα, p38 and ERK. | [62] | ||
Dsylipidemia | EUL extract | High-fat diet (HFD)-induced male Sprague-Dawley | 200 mg/kg | Hepatoprotective | Inhibit ER stress, enhance lysosomal function, and increase autophagic flux associated with inhibition of the mTOR-ER stress pathway. | [63] | |
EUE extract, aucubin and geniposide | Palmitate-induced HepG2 cells HFD-induced female Sprague-Dawley rats |
100 μg/mL extracts, 10 μg/mL aucubin or geniposide | Anti-hepatic dyslipidemia | Inhibit ER stress by increasing V-ATPase activity, reduce hepatic lipid accumulation through secretion of apolipoprotein B and associated triglycerides and cholesterol; Enhance lysosomal activity and to regulate ER stress. |
[64] | ||
EUE extract | CCl4-induced Sprague-Dawley rats | 0.25–1 g/kg | Anti-hepatic dyslipidemia | Increase lysosomal enzyme activity, reduce ER stress by improving Apo B secretion, then inhibit ROS accumulation. | [65] | ||
EUE extract, aucubin, geniposide | BAX-induced HepG2 cells; | HFD-induced female Sprague-Dawley | 100 μg/mL extracts, 10 μg/mL aucubin or geniposide; 0.25–1 g/kg; |
Anti-hepatic dyslipidemia | Inhibit cell death through enhancement of lysosome activity; Enhance lysosomal activity to the regulate lysosomal BAX activation and cell death. |
[66] | |
CGA enriched-EUL extract | HepG2 cells | 10–80 mg/L; 0.3–600 μM; | Lipid-lowering | Activate AMPK and inhibit SREBP2 and HMGCR to reduce TC synthesis and TG levels, increase ABCA1 and CYP7A1, and enhance TC excretion and bile acid transport, synthesis and excretion. | [67] | ||
Total flavonoid | HFD-induced male Wistar rats | 10–90 mg/kg/day | Anti-hyperlipidemia | Lower serum cholesterol, triglyceride, lipoprotein, apolipoprotein, and density lipoprotein cholesterol levels, increase HDL cholesterol and apolipoprotein A. | [68] | ||
Osteoporosis | Total lignans | Primary cultures of rat osteoblasts | Ovariectomy rat model | 20, 40, or 80 mg/kg/day; 300 μg/mL |
Anti-osteoporosis, prevent OVX-induced decrease of bone mass and deterioration of trabecular microarchitecture | Induce primary osteoblastic cell proliferation and differentiation; Increase osteoprotegrin expression and decrease NF-κB ligand expression. |
[69] |
EUE extract | Adolescent female rats | 30, 100 mg/kg | Increase longitudinal bone growth rate and enhance osteoblastogenesis | Promote chondrogenesis in the growth plate and increase BMP-2 and IGF-1. | [70] | ||
5-(hydroxymethyl)-2-furaldehyde (5-HMF) | Rat bone mesenchymal stem cells (bMSCs) | 0.05, 0.10, and 0.20 mg/mL | Anti-osteoporosis; inhibit adipogenesis and enhance osteoblastogenesis | Increase ALP, COL1alpha1 (7 days only), OCN and OPN expression, decrease PPARgamma, FABP4, C/EBPalpha and LPL expression. | [71] | ||
Pinoresinol 4′-O-β-d-glucopyranoside, pinoresinol di-O-β-d-glucopyranoside, aucubin, wogonin, baicalein, and α-O-β-d-glucopyranosyl-4,2′,4′-trihydroxydihydrochalcone | MCF-7 cells; MDA-MB-231 cells; Hela cells | 10−6 M, 10−5 M, and 10−4 M | Prevent estrogen deficiency-induced osteoporosis | Activate ER-dependent transcription of estrogen target genes; Exhibit significant difference in ER subtype (α vs. β) selectivity; Proliferation effect on breast cancer cells mediated by the genomic action of Erα. Stimulation of endogenous estrogen-responsive genes (pS2). |
[72] | ||
EUL extracts | Rat osteoblastic MC3T3-E1 cells | 6.25, 12.5, 25, 50, and 100 µg/mL | Anti-osteoporosis, restrain cell oxidative damage and increase cell survival rate in a dose-dependent manner | Decrease the expression of caspases 3, 6, 7, and 9. | [73] | ||
Insomnia | Astragalin; Eucommiol | KM mice | 5, 10 and 20 mg/kg; 50, 100, and 200 mg/kg |
Reduce spontaneous activity, increase sleep ratio, shorten sleep latency and lengthen sleep time; Reduce the convulsion rate and prolong convulsion latency. |
[74][75] | ||
Hypertension | Total flavonoid | Human glioblastoma cells (U251, U87, HS683 and A172) | 0.5–32 μg/mL | Enhance the radiotherapy effect, decrease the cell viability, inhibit migration and invasion, | HIF-α/MMP-2 pathway and intrinsic apoptosis pathway. | [46] | |
Male flower extract | Male spontaneously hypertensive rats, Sprague Dawley rats | 0.05, 0.10, 0.20 g/mL | Reduce blood pressure, promote the expression of ACE2 | Activate the ACE2-Ang-(1–7)-Mas signaling pathways. | [76] | ||
EUL extract | Wistar-Kyoto rats | 5% (w/w, extract/high-fat diet) | Reduce blood pressure, prevent aortic media hypertrophy | [11] | |||
Diabetes mellitus | EUE extract | Streptozotocin (STZ)-induced diabetic rat model | 1.4 g/kg | Reduce the level of plasma glucose | Prohibit the reduction of superoxide dismutase (SOD) activity; Suppress the elevation of malondialdehyde (MDA). |
[77] | |
EUL extract and EUL powder | HFD-induced male SD rats | 3%, 9% EUL 3%, 9% EGLP |
Improve insulin resistance and decrease plasma glucose level, reduce the production of ATP and the level of triacylglyceride, and regulate fatty acid oxidation | Enhance the use of circulating blood glucose in skeletal muscles. | [78] | ||
Asperuloside | HFD-induced male SD rats | 0.03, 0.1, 0.3 ASP; 5% ELE | Reduce body weight, visceral fat, food intake, and circulating levels of glucose, insulin, triacylglyceride and nonesterified fatty acid | Increase mRNA levels of Cs, Idh3α, Ogdh, Sdha, Comp I, Comp IV, and Comp V in skeletal muscles; Reduce ATP production in WAT; Increase mRNA level of FA transport protein, Cpt1α and Acadvl, suppress Fas mRNA, and activate FA β-oxidation. | [79] | ||
5% chlorogenic acids contained in ELE | HepG2 cells | 200, 400, 500 μg/mL | Promote glucose uptake | Inhibit glucose-6-phosphate displacement enzyme and α-glucosidase. | [80] | ||
E. ulmoides | STZ induced- type 1-like DM rats | 1 g/kg/day oral administration | Decrease the level of blood urea nitrogen and creatinine, improve renal fibrosis, without influencing blood glucose level | Inhibit TGF-β/Smad signaling pathway and suppress expression of TGF-β/connective tissue growth factor. | [81] | ||
EUE extract | STZ-induced mice | 200 mg/kg oral administration | Inhibit production of advanced glycation end products (AGEs) and AGEs receptors | Increase the Glo1 expression and activity; Elevate Nrf2 protein expression and reduce RAGE expression. |
[82] | ||
Isoquercetin, 6″-O-acetyl-astragalin, kaempferol, quercetin, rutin, kaempferol 3-O-rutinoside, astragalin | Ribose-gelatin | 0.01, 0.1, 1, 10, 100 μg/mL | Inhibit the formation of AGEs | Block the formation of CML and CMA. | [83] | ||
Lignans | RF/6A cells | STZ-induced male C57BL/6 mice | 25, 50, 75, and 100 μg/mL | Protect endothelial function from AGEs injury and oxidative stress | Regulate Nrf2/HO-1 signaling pathway. | [16] | |
Lignans | RMCs (HBZY-1 cells) | 20, 40, and 80 mg/L | Inhibit the proliferation of mesangial cells | Reduce the mRNA expression of Col I, Col III, Col IV, and fibronectin; Reverse the elevation of aldose reductase. |
[84] | ||
Obesity | Asperuloside | Male C57BL/6J mice | 0.25% (w/w) | Reduce liver, epididymal, and mesenteric white adipose tissue, decrease serum triglyceride level |
Increase Akkermansia, Parabacteroides, Bacteroides, Sutterella, Anaerostipes, Roseburia, and Coprobacillus abundance Change metabolic level of cecum, Inhibit GLP-1; Reduce the level of tumor necrosis factor alpha (TNFα), monocyte chemoattractant protein 1 (MCP1), and collagen type 1 alpha1 (Col1a1) Increase lipoprotein lipase (Lpl) and carnitine palmitoyl transferase 1 (Cpt1). |
[85] | |
EUL extract Asperuloside |
HFD-induced male SD rats | 0.03, 0.1, 0.3 ASP; 5% ELE | ASP reduce the body weight, visceral fat, food take, triacylglyceride and nonestesterified fatty acid | Diminish dehydrogenase;Increase Glut4, succinyl CoA synthase; Increase mRNA levels of Cs, Idh3α, Ogdh, Sdha, Comp I, Comp IV and Comp V in skeletal muscles; Increase uncoupling protein 1 in brown adipose tissue mRNA;Reduce ATP production in WAT; Increase mRNA level of FA transport protein, Cpt1α and Acadvl, suppress Fas mRNA, and activate FA β-oxidation. |
[79] | ||
Quercetin | Reduce fat accumulation in liver | Decrease the level of plasma lipid. | [86] | ||||
ELE, ELE aroma | Male SD rats | 5% ELE | Promote metabolism of lipid | Elevate the level of Cpt2, Acad, complex II and V mRNA in liver; Increase expression of brain-derived neurotrophic factor, protein kinase, and phospholipase Cγ in hypothalamus. |
[87] | ||
ELE extract | Male Wistar-Kyoto rats | 5% ELE | Reduce the body weight gain, visceral and perirenal fat | [11] | |||
CGA-enriched extract from EUE | HepG2 cells | 10, 20, 25, 40, 60, and 80 mg/L | Reduce the lipid in HepG2 cells | Elevate the expression of ABCA1, CYP7A1, and AMPKα2; Reduce the level of SREBP2 and inhibit mRNA and expression of HMGCR. |
[67] |