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Topic Review
Epithelial
Respiratory diseases are frequently characterised by epithelial injury, airway inflammation, de-fective tissue repair, and airway remodelling. This may occur in a subacute or chronic context, such as asthma and chronic obstructive pulmonary disease, or occur acutely as in pathogen challenge or acute respiratory distress syndrome (ARDS). Despite the frequent challenge of lung homeostasis, not all pulmonary insults lead to disease. Traditionally thought of as a quiescent organ, emerging evidence highlights that the lung has significant capacity to respond to injury by repairing and replacing damaged cells. This occurs with the appropriate and timely resolution of inflammation and concurrent initiation of tissue repair programmes. Airway epithelial cells are key effectors in lung homeostasis and host defence; continual exposure to pathogens, toxins, and particulate matter challenge homeostasis, requiring robust defence and repair mechanisms. As such, the epithelium is critically involved in the return to homeostasis, orchestrating the resolution of inflammation and initiating tissue repair. 
  • 977
  • 04 Mar 2021
Topic Review
Mastocytosis
Mastocytosis is a heterogeneous group of rare diseases defined by abnormal accumulation of clonal mast cells (MC) in the skin, bone marrow and/or other visceral organs.
  • 976
  • 27 Oct 2020
Topic Review
Intracellular Signalling in Wound Healing
The cells response to injury is initiated by growth factors and cytokines that play a key role in wound restoration, and their biological action is achieved via signal transduction. Growth factors and cytokines play distinct roles through all phases of wound healing. In response to injury, they can trigger several strategic signalling transduction pathways that are mostly activated during embryonic skin development. Extracellular signal-regulated kinases (ERKs) and calcium (Ca2+) are the first intracellular signalling molecules for tissue repair response. These signalling molecules regulate several biological activities including cellular migration, proliferation, contractility, survival and many more related to different transcription factors that are usually induced by several other intracellular signalling pathways. This phenomenon makes it difficult to link a specific signalling response to injury.
  • 976
  • 28 Apr 2022
Topic Review
Molecular Inversion Probe
Molecular Inversion Probe (MIP) belongs to the class of Capture by Circularization molecular techniques for performing genomic partitioning, a process through which one captures and enriches specific regions of the genome. Probes used in this technique are single stranded DNA molecules and, similar to other genomic partitioning techniques, contain sequences that are complementary to the target in the genome; these probes hybridize to and capture the genomic target. MIP stands unique from other genomic partitioning strategies in that MIP probes share the common design of two genomic target complementary segments separated by a linker region. With this design, when the probe hybridizes to the target, it undergoes an inversion in configuration (as suggested by the name of the technique) and circularizes. Specifically, the two target complementary regions at the 5’ and 3’ ends of the probe become adjacent to one another while the internal linker region forms a free hanging loop. The technology has been used extensively in the HapMap project for large-scale SNP genotyping as well as for studying gene copy alterations and characteristics of specific genomic loci to identify biomarkers for different diseases such as cancer. Key strengths of the MIP technology include its high specificity to the target and its scalability for high-throughput, multiplexed analyses where tens of thousands of genomic loci are assayed simultaneously.
  • 976
  • 02 Nov 2022
Topic Review
EPR Effect for Cancer Treatment
The EPR effect was first discovered by Maeda and colleagues in solid murine tumors. The polymer-drug conjugates were i.v. administered, and 10-to-100-fold higher concentrations were achieved relative to free drug administration. The concentration of nanodrugs builds up in tumors due to the EPR effect, reaching several times higher than that of plasma due to the lack of lymphatic drainage. 
  • 975
  • 23 Jun 2021
Topic Review
Glucose 6-P Dehydrogenase in Skeletal Muscle during Exercise
Hypomorphic Glucose 6-P dehydrogenase (G6PD) catalyzes the rate-limiting step in the pentose phosphate pathway (PPP), which provides the precursors of nucleotide synthesis for DNA replication as well as reduced nicotinamide adenine dinucleotide phosphate (NADPH). NADPH is involved in the detoxification of cellular reactive oxygen species (ROS) and de novo lipid synthesis. An association between increased PPP activity and the stimulation of cell growth has been reported in different tissues including the skeletal muscle, liver, and kidney. PPP activity is increased in skeletal muscle during embryogenesis, denervation, ischemia, mechanical overload, the injection of myonecrotic agents, and physical exercise. In fact, the highest relative increase in the activity of skeletal muscle enzymes after one bout of exhaustive exercise is that of G6PD, suggesting that the activation of the PPP occurs in skeletal muscle to provide substrates for muscle repair. The age-associated loss in muscle mass and strength leads to a decrease in G6PD activity and protein content in skeletal muscle. G6PD overexpression in Drosophila Melanogaster and mice protects against metabolic stress, oxidative damage, and age-associated functional decline, and results in an extended median lifespan. 
  • 975
  • 02 Nov 2022
Topic Review
Aurora Kinase B in Cancer
Aurora kinase B (AURKB) is a mitotic serine/threonine protein kinase that belongs to the aurora kinase family along with aurora kinase A (AURKA) and aurora kinase C (AURKC). AURKB is a member of the chromosomal passenger protein complex and plays a role in cell cycle progression.
  • 971
  • 23 Jun 2021
Topic Review
Subtype-Specific Cardiomyocytes
Cardiogenesis produces multiple cardiac muscle cell subtypes, including the contractile cardiomyocytes constituting the four heart chambers and the non-contractile cardiomyocytes forming the cardiac conduction system. The various cardiac cellular subtypes (e.g. atrial, ventricular, nodal) are highly specified, with each subtype expressing a unique set of structural proteins, ion channels and transcription factors. Stringent spatiotemporal molecular, transcriptomic, and electrophysiological regulation gives rise to the differentiation and maturation of the multiple cardiomyocyte subtypes. The precise generation of subtype-specific cardiomyocytes is necessary for translational applications of stem cell-derived cardiomyocytes for regenerative medicine.  
  • 969
  • 21 Apr 2021
Topic Review
Tendon and Mast Cells
Understanding the links between the tendon healing process, inflammatory mechanisms, and tendon homeostasis after tissue damage is crucial in developing novel therapeutics for human tendon disorders. The inflammatory mechanisms that are operative in response to tendon injury are not fully understood, but it has been suggested that inflammation occurring in response to nerve signaling, i.e., neurogenic inflammation, has a pathogenic role. In this review, we discuss the role of mast cells in the communication with peripheral nerves, and their emerging role in tendon healing and inflammation after injury.
  • 965
  • 29 Oct 2020
Topic Review
Notch Signaling
Roles of Notch signaling in human development and cancer are reviewed herein. The four Notch paralogs along with the five Notch ligands are described. Their structures, mode of activation, and functions are briefly summarized based on published works.
  • 962
  • 21 Oct 2020
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