Inhibition of myostatin is an attractive strategy for the treatment of muscular atrophic diseases such as muscular dystrophy. For the efficient inhibition of myostatin, functionalized peptides were developed by the conjugation of a 16-mer myostatin-binding d-peptide with a photooxygenation catalyst. These peptides induced myostatin-selective photooxygenation and inactivation under near-infrared irradiation, and were associated with little cytotoxicity or phototoxicity. The peptides are resistant to enzymatic digestion due to their d-peptide chains. These properties could contribute to the use of photooxygenation-based inactivation strategies targeting myostatin.
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http://dx.doi.org/10.1039/d2md00425a | DOI Listing |
Cells
December 2024
Department of Biology, Carleton University, 1125 Colonel By Drive, Ottawa, ON K1S 5B6, Canada.
Little brown bats () cluster in hibernacula sites over winter, in which they use metabolic rate depression (MRD) to facilitate entrance and exit of hibernation. This study used small RNA sequencing and bioinformatic analyses to identify differentially regulated microRNAs (miRNAs) and to predict their downstream effects on Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) terms in the skeletal muscle of torpid as compared to euthermic controls. We observed a subset of ten miRNAs whose expression changed during hibernation, with predicted functional roles linked to cell cycle processes, downregulation of protein degradation via ubiquitin-mediated proteolysis, downregulation of signaling pathways, including MAPK, p53, mTOR, and TGFβ, and downregulation of cytoskeletal and vesicle trafficking terms.
View Article and Find Full Text PDFExp Cell Res
December 2024
Department of Limbs (Foot and Hand) Microsurgery, Chenzhou No.1 People's Hospital, The First Clinical Medical College Affiliated to Southern Medical University, Chenzhou, Hunan, China. Electronic address:
Background: Promoting muscle regeneration through stem cell therapy has potential risks. We investigated the effect of umbilical cord mesenchymal stem cells (UMSCs) Exosomes (Exo) Follistatin on muscle regeneration.
Methods: The Exo was derived from UMSCs cells and was utilized to affect the mice muscle injury model and C2C12 cells myotubes atrophy model.
J Med Food
January 2025
Division of Food and Nutrition and Human Ecology Research Institute, Chonnam National University, Gwangju, Republic of Korea.
Here, we investigated whether a mixture of and (1:3, KGC01CE) could suppress muscle atrophy in HO-induced C2C12 cells and dexamethasone-injected mice. Our results revealed that KGC01CE effectively safeguarded against HO-induced muscle atrophy in C2C12 cells compared with the same mixture at other ratios. We demonstrated that dexamethasone elicited oxidative stress in muscle tissue and decreased the grip strength and cross-sectional areas of muscle fibers; however, oral administration of KGC01CE (1:3) suppressed these dexamethasone-induced changes.
View Article and Find Full Text PDFDiseases
December 2024
Division of Nephrology, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Hualien 97004, Taiwan.
Background/objectives: Myostatin, primarily produced by skeletal muscle, inhibits muscle growth and promotes protein degradation. It has been implicated in conditions such as obesity, insulin resistance, and cardiovascular disease. However, its association with endothelial function in chronic kidney disease (CKD) patients remains unclear.
View Article and Find Full Text PDFJ Med Food
December 2024
Graduate Program in Bioindustrial Engineering, Yonsei University, Seoul, Republic of Korea.
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