Mesenchymal stromal cells (MSCs), also known as fibro-adipogenic progenitors, play a critical role in muscle maintenance and sarcopenia development. Although analogous MSCs are present in various tissues, recent single-cell RNA-seq studies have revealed the inter-tissue heterogeneity of MSCs. However, the functional significance of MSC heterogeneity and its role in aging remain unclear. Here, we investigated the properties of MSCs and their age-related changes in seven mouse tissues through histological, cell culture, and genetic examinations. The tissue of origin had a greater impact on the MSC transcriptome than aging. By first analyzing age-related changes, we found that Kera is exclusively expressed in muscle MSCs and significantly down-regulated by aging. Kera knockout mice recapitulated some sarcopenic phenotypes including reduced muscle mass and specific force, revealing the functional importance of Kera in the maintenance of muscle youth. These results suggest that MSCs have tissue-specific supportive functions and that deterioration in these functions may trigger tissue aging.
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http://dx.doi.org/10.1111/acel.14299 | DOI Listing |
Front Immunol
January 2025
Department of Urology, Urologic Surgery Center, Xinqiao Hospital, Third Military Medical University (Army Medical University), Chongqing, China.
Background: Radical cystectomy (RC) combined with pelvic lymph node dissection (PLND) is the standard treatment for muscle-invasive bladder cancer (MIBC). For metastatic MIBC patients, platinum-based chemotherapy remains the first choice treatment. However, approximately 50% of patients with metastatic MIBC are ineligible for platinum-based adjuvant chemotherapy because of impaired renal function.
View Article and Find Full Text PDFZhongguo Shi Yan Xue Ye Xue Za Zhi
December 2024
Department of Hematology, The Second Hospital of Hebei Medical University, Hebei Key Laboratory of Hematology, Shijiazhuang 050000, Hebei Province, China.
Objective: To explore the diagnosis and treatment of acquired hemophilia A (AHA) based on the analysis of clinical data.
Methods: A retrospective analysis was conducted on the clinical manifestations, laboratory characteristics, treatment, and outcomes of 25 patients diagnosed with AHA who were admitted to the Second Hospital of Hebei Medical University.
Results: Among all patients, 11 cases had secondary factors, including 5 cases of autoimmune diseases, 3 cases of pregnancy-related disease, 1 case of pemphigoid, 1 case of Graves' disease, and 1 case of monoclonal gammaglobulinemia of unknown significance (MGUS).
Biochem Biophys Res Commun
December 2024
Molecular Signaling and Biochemistry, Kyushu Dental University, Kokurakitaku, Kitakyushu, Fukuoka, Japan.
Bone morphogenetic protein (BMP)-3b, also known as growth differentiation factor (GDF)-10, belongs to the transforming growth factor (TGF)-β superfamily. Despite being named a BMP, BMP3b is considered as an intermediate between the TGFβ/activin/myostatin and BMP/GDF subgroups of the TGFβ superfamily. Myoblast differentiation is tightly regulated by various cytokines, including the TGFβ superfamily members.
View Article and Find Full Text PDFUltrastruct Pathol
January 2025
Medical Histology and Cell Biology Department, Faculty of Medicine, Zagazig University, Zagazig, Egypt.
Over half million individuals suffer from chronic kidney disease (CKD) worldwide. In addition to raising the possibility of cardiovascular diseases, skeletal myopathy remains a challenging complication that is highly correlated with mortality and a lower quality of life. Granulocyte-colony stimulating factor (G-CSF) is an active cytokine for mobilization of immunological and hematopoietic stem cells that can replace exogenous stem cell infusions.
View Article and Find Full Text PDFLife Sci
December 2024
Centre for Muscle Research, Department of Anatomy and Physiology, The University of Melbourne, VIC 3010, Australia. Electronic address:
Aims: Cancer cachexia affects up to 80 % of patients with advanced cancer and accounts for >20 % of all cancer-related deaths. Sarcolemmal localization of dystrophin, a key protein within the dystrophin-glycoprotein complex (DGC), is perturbed in multiple muscle wasting conditions, including cancer cachexia, indicating a potential role for dystrophin in the maintenance of muscle mass. Strategies to preserve dystrophin expression at the sarcolemma might therefore combat muscle wasting.
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