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https://www.readbyqxmd.com/read/28430433/-2r-3s-2-r-3-r-manniflavanone-protects-proliferating-skeletal-muscle-cells-against-oxidative-stress-and-stimulates-myotube-formation
#1
Suresh Acharya, Timo D Stark, Seung Tack Oh, Songhee Jeon, Sok Cheon Pak, Mina K Kim, Toshiaki Matsutomo, Jinyoung Hur, Thomas Hofmann, Rodney A Hill, Onesmo B Balemba
We investigated the antioxidative properties of (2R,3S,2''R,3''R)-Manniflavanone (MF) using in vitro assays, and examined its effects on myogenesis and lactate-induced oxidative stress in C2C12 cells. MF was purified from Garcinia buchananii stem bark. H2O2 and ORAC assay demonstrated that MF is a powerful antioxidant. This finding was supported by DPPH radical scavenging activity of MF. MF was less cytotoxic to C2C12 cells compared to ascorbic acid and myricetin. Moreover, MF accelerated myotube formation in the differentiated C2C12 cells by up-regulating myogenic proteins such as MyoG and MHC...
April 21, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28423312/hgfa-is-an-injury-regulated-systemic-factor-that-induces-the-transition-of-stem-cells-into-galert
#2
Joseph T Rodgers, Matthew D Schroeder, Chanthia Ma, Thomas A Rando
The activation of quiescent stem cells into the cell cycle is a key step in initiating the process of tissue repair. We recently reported that quiescent stem cells can transition into GAlert, a cellular state in which they have an increased functional ability to activate and participate in tissue repair. However, the precise molecular signals that induce GAlert in stem cells have remained elusive. Here, we show that the injury-induced regulation of hepatocyte growth factor (HGF) proteolytic processing via the systemic protease, hepatocyte growth factor activator (HGFA), stimulates GAlert in skeletal muscle stem cells (MuSCs) and fibro-adipogenic progenitors (FAPs)...
April 18, 2017: Cell Reports
https://www.readbyqxmd.com/read/28421003/acellular-gelatinous-material-of-human-umbilical-cord-enhances-wound-healing-a-candidate-remedy-for-deficient-wound-healing
#3
Nazihah Bakhtyar, Marc G Jeschke, Laurence Mainville, Elaine Herer, Saeid Amini-Nik
Impaired wound healing is a severe clinical challenge and research into finding effective wound healing strategies is underway as there is no ideal treatment. Gelatinous material from the umbilical cord called Wharton's jelly is a valuable source of mesenchymal stem cells which have been shown to aid wound healing. While the cellular component of Wharton's jelly has been the subject of extensive research during the last few years, little is known about the de-cellularized jelly material of the umbilical cord...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28420418/adult-muscle-derived-stem-cells-engraft-and-differentiate-into-insulin-expressing-cells-in-pancreatic-islets-of-diabetic-mice
#4
Violeta Mitutsova, Wendy Wai Yeng Yeo, Romain Davaze, Celine Franckhauser, El-Habib Hani, Syahril Abdullah, Patrice Mollard, Marie Schaeffer, Anne Fernandez, Ned J C Lamb
BACKGROUND: Pancreatic beta cells are unique effectors in the control of glucose homeostasis and their deficiency results in impaired insulin production leading to severe diabetic diseases. Here, we investigated the potential of a population of nonadherent muscle-derived stem cells (MDSC) from adult mouse muscle to differentiate in vitro into beta cells when transplanted as undifferentiated stem cells in vivo to compensate for beta-cell deficiency. RESULTS: In vitro, cultured MDSC spontaneously differentiated into insulin-expressing islet-like cell clusters as revealed using MDSC from transgenic mice expressing GFP or mCherry under the control of an insulin promoter...
April 18, 2017: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/28419002/skeletal-muscle-remodeling-interconnections-between-stem-cells-and-protein-turnover
#5
Nicholas A Burd, Michael De Lisio
Nutrition and exercise are important components of a healthy lifestyle to improve rates of hypertrophic and non-hypertrophic skeletal muscle remodeling. We provide evidence to support the hypothesis that muscle stem cells and protein turnover are collaborative, not separate, mechanisms supporting muscle remodeling by facilitating protein, nuclear, and cellular turnover in response to the ingestion of protein dense foods and exercise.
April 17, 2017: Exercise and Sport Sciences Reviews
https://www.readbyqxmd.com/read/28417342/adipose-tissue-derived-stem-cell-therapy-for-erectile-dysfunction-in-rats-a-systematic-review-and-meta-analysis
#6
REVIEW
Quan-Liang Hou, Meng-Ying Ge, Cheng-da Zhang, Dan-Dan Tian, Lian-Ke Wang, Hui-Zi Tian, Wen-Hua Wang, Wei-Dong Zhang
OBJECTIVE: We aimed to systematically assess the effect of adipose tissue-derived stem cell (ADSC) therapy and its influential factors on the treatment of erectile dysfunction (ED) in rats. METHODS: Two authors independently searched for published studies through PubMed and EMBASE from study inception until August 31, 2016. A meta-analysis was used to combine the effect estimate from the published studies. A subgroup analysis was performed to identify the effect of some influential factors...
April 17, 2017: International Urology and Nephrology
https://www.readbyqxmd.com/read/28417015/characterization-and-isolation-of-highly-purified-porcine-satellite-cells
#7
Shijie Ding, Fei Wang, Yan Liu, Sheng Li, Guanghong Zhou, Ping Hu
Pig is an important food source and an excellent system to model human diseases. Careful characterization of the swine skeletal muscle stem cells (satellite cells) will shed lights on generation of swine skeletal muscle disease model and efficient production of porcine meat for the food industry. Paired box protein 7 (Pax7) is a highly conserved transcription factor shared by satellite cells from various species. However, the sequence of Pax7 has not been characterized in pig. The lack of method to isolate highly purified satellite cells hinders the thorough characterization of the swine satellite cells...
2017: Cell Death Discovery
https://www.readbyqxmd.com/read/28414312/high-resolution-myogenic-lineage-mapping-by-single-cell-mass-cytometry
#8
Ermelinda Porpiglia, Nikolay Samusik, Andrew Tri Van Ho, Benjamin D Cosgrove, Thach Mai, Kara L Davis, Astraea Jager, Garry P Nolan, Sean C Bendall, Wendy J Fantl, Helen M Blau
Muscle regeneration is a dynamic process during which cell state and identity change over time. A major roadblock has been a lack of tools to resolve a myogenic progression in vivo. Here we capitalize on a transformative technology, single-cell mass cytometry (CyTOF), to identify in vivo skeletal muscle stem cell and previously unrecognized progenitor populations that precede differentiation. We discovered two cell surface markers, CD9 and CD104, whose combined expression enabled in vivo identification and prospective isolation of stem and progenitor cells...
April 17, 2017: Nature Cell Biology
https://www.readbyqxmd.com/read/28413812/quantitative-3d-time-lapse-imaging-of-muscle-progenitors-in-skeletal-muscle-of-live-mice
#9
Micah T Webster, Tyler Harvey, Chen-Ming Fan
For non-optically clear mammalian tissues, it is now possible to use multi-photon microscopy to penetrate deep into the tissue and obtain detailed single cell images in a live animal, i.e., intravital imaging. This technique is in principle applicable to any fluorescently marked cell, and we have employed it to observe stem cells during the regenerative process. Stem cell-mediated skeletal muscle regeneration in the mouse model has been classically studied at specific time points by sacrificing the animal and harvesting the muscle tissue for downstream analyses...
December 20, 2016: Bio-protocol
https://www.readbyqxmd.com/read/28413456/role-of-stem-cell-growth-factor-c-kit-in-the-pathogenesis-of-irritable-bowel-syndrome
#10
Yuna Chai, Yusheng Huang, Hongmei Tang, Xing Tu, Jianbo He, Ting Wang, Qingye Zhang, Fen Xiong, Detang Li, Zhenwen Qiu
Irritable bowel syndrome (IBS) is a functional bowel disease with a complicated etiopathogenesis, often characterized by gastrointestinal motility disorder and high visceral sensitivity. IBS is a comprehensive multi-systemic disorder, with the interaction of multiple factors, such as mental stress, intestinal function and flora, heredity, resulting in the disease. The existence of a common mechanism underlying the aforementioned factors is currently unknown. The lack of therapies that comprehensively address the disease symptoms, including abdominal pain and diarrhea, is a limitation of current IBS management...
April 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28411356/mitochondrial-neurogastrointestinal-encephalomyopathy-syndrome-treated-with-stem-cell-transplant-a-case-series-and-literature-review
#11
Amr Hanbali, Walid Rasheed, Musthafa Chalikandy Peedikayil, Saeed Boholega, Hazza A Alzahrani
Mitochondrial neurogastrointestinal encephalomyopathy syndrome is a rare autosomal recessive multisystem disorder caused by nuclear TYMP gene mutations, which leads to deficiency in thymidine phosphorylase enzyme. This deficiency then leads to mitochondrial dysfunction, which causes the features characteristic of this syndrome, including severe muscle wasting, gastrointestinal dysmotility, leukoencephalopathy, peripheral neuropathy, and ophthalmoplegia. Here, we present a case series of 3 patients with mitochondrial neurogastrointestinal encephalomyopathy from Saudi Arabia who underwent allogeneic stem cell transplant at King Faisal Specialist Hospital (Riyadh, Saudi Arabia)...
April 14, 2017: Experimental and Clinical Transplantation
https://www.readbyqxmd.com/read/28409313/extracellular-regulation-of-the-mitotic-spindle-and-fate-determinants-driving-asymmetric-cell-division
#12
Prestina Smith, Mark Azzam, Lindsay Hinck
Stem cells use mode of cell division, symmetric (SCD) versus asymmetric (ACD), to balance expansion with self-renewal and the generation of daughter cells with different cell fates. Studies in model organisms have identified intrinsic mechanisms that govern this process, which involves partitioning molecular components between daughter cells, frequently through the regulation of the mitotic spindle. Research performed in vertebrate tissues is revealing both conservation of these intrinsic mechanisms and crucial roles for extrinsic cues in regulating the frequency of these divisions...
2017: Results and Problems in Cell Differentiation
https://www.readbyqxmd.com/read/28408960/molecular-characterization-and-function-of-tenomodulin-a-marker-of-tendons-and-ligaments-that-integrate-musculoskeletal-components
#13
REVIEW
Chisa Shukunami, Yuki Yoshimoto, Aki Takimoto, Hiroshi Yamashita, Yuji Hiraki
Tendons and ligaments are dense fibrous bands of connective tissue that integrate musculoskeletal components in vertebrates. Tendons connect skeletal muscles to the bone and function as mechanical force transmitters, whereas ligaments bind adjacent bones together to stabilize joints and restrict unwanted joint movement. Fibroblasts residing in tendons and ligaments are called tenocytes and ligamentocytes, respectively. Tenomodulin (Tnmd) is a type II transmembrane glycoprotein that is expressed at high levels in tenocytes and ligamentocytes, and is also present in periodontal ligament cells and tendon stem/progenitor cells...
November 2016: Japanese Dental Science Review
https://www.readbyqxmd.com/read/28407826/-a-retrospective-analysis-of-6-children-with-duchenne-muscular-dystrophy
#14
Yu-Jie Yin, Yu-Ping Huang, Chao Lu, Xue-Ping Sun, Feng-Nan Niu, Rui Jin, Guo-Ping Zhou
OBJECTIVE: To analyze the clinical features of 6 children with Duchenne muscular dystrophy (DMD) and review related literature, and to provide a basis for early diagnosis and effective treatment of this disease. METHODS: A retrospective analysis was performed on the clinical data of 6 children with DMD who were admitted to the First Affiliated Hospital of Nanjing Medical University from January 2010 to October 2015. RESULTS: All the 6 cases were boys without a family history of DMD, and the age of diagnosis of DMD was 1...
April 2017: Zhongguo Dang Dai Er Ke za Zhi, Chinese Journal of Contemporary Pediatrics
https://www.readbyqxmd.com/read/28407473/trimodal-rescue-of-hind-limb-ischemia-with-growth-factors-cells-and-nanocarriers-fundamentals-to-clinical-trials
#15
Rajesh Laksmanan, Gopi Ukani, Muhammad Tipu Rishi, Nilanjana Maulik
Peripheral Artery Disease is a severe medical condition commonly characterized by critical or acute limb ischemia. Gradual accumulation of thrombotic plaques in peripheral arteries of the lower limb may lead to intermittent claudication or ischemia in muscle tissue. Ischemic muscle tissue with lesions may become infected, resulting in a non-healing wound. Stable progression of the non-healing wound associated with severe ischemia might lead to functional deterioration of the limb, which, depending on the severity, can result in amputation...
April 13, 2017: Canadian Journal of Physiology and Pharmacology
https://www.readbyqxmd.com/read/28405609/preconditioned-mesenchymal-stem-cells-treat-myasthenia-gravis-in-a-humanized-preclinical-model
#16
Muriel Sudres, Marie Maurer, Marieke Robinet, Jacky Bismuth, Frédérique Truffault, Diane Girard, Nadine Dragin, Mohamed Attia, Elie Fadel, Nicola Santelmo, Camille Sicsic, Talma Brenner, Sonia Berrih-Aknin
Myasthenia gravis (MG) with anti-acetylcholine receptor (AChR) Abs is an autoimmune disease characterized by severe defects in immune regulation and thymic inflammation. Because mesenchymal stem cells (MSCs) display immunomodulatory features, we investigated whether and how in vitro-preconditioned human MSCs (cMSCs) could treat MG disease. We developed a new humanized preclinical model by subcutaneously grafting thymic MG fragments into immunodeficient NSG mice (NSG-MG model). Ninety percent of the animals displayed human anti-AChR Abs in the serum, and 50% of the animals displayed MG-like symptoms that correlated with the loss of AChR at the muscle endplates...
April 6, 2017: JCI Insight
https://www.readbyqxmd.com/read/28403842/outcomes-of-autologous-bone-marrow-mononuclear-cells-for-cerebral-palsy-an-open-label-uncontrolled-clinical-trial
#17
Liem Thanh Nguyen, Anh Tuan Nguyen, Chinh Duy Vu, Doan V Ngo, Anh V Bui
BACKGROUND: Stem cell therapy has emerged as a promising method for improving motor function of patients with cerebral palsy. The aim of this study is to assess the safety and effectiveness of autologous bone marrow mononuclear stem cell transplantation in patients with cerebral palsy related to oxygen deprivation. METHODS: An open label uncontrolled clinical trial was carried out at Vinmec International Hospital. The intervention consisted of two administrations of stem cells, the first at baseline and the second 3 months later...
April 12, 2017: BMC Pediatrics
https://www.readbyqxmd.com/read/28401807/biophysical-stimulation-for-engineering-functional-skeletal-muscle
#18
Sarah Somers, Alexander Spector, Douglas DiGirolamo, Warren L Grayson
Tissue engineering is a promising therapeutic strategy to regenerate skeletal muscle. However, ex vivo cultivation methods typically result in a low differentiation efficiency of stem cells as well as grafts that resemble the native tissues morphologically, but lack contractile function. The application of biomimetic tensile strain provides a potent stimulus for enhancing myogenic differentiation and engineering functional skeletal muscle grafts. We reviewed integrin-dependent mechanisms that potentially link mechanotransduction pathways to the upregulation of myogenic genes...
April 12, 2017: Tissue Engineering. Part B, Reviews
https://www.readbyqxmd.com/read/28400501/contribution-of-minced-muscle-graft-progenitor-cells-to-muscle-fiber-formation-after-volumetric-muscle-loss-injury-in-wild-type-and-immune-deficient-mice
#19
Benjamin T Corona, Beth E P Henderson, Catherine L Ward, Sarah M Greising
Volumetric muscle injury (VML) causes an irrecoverable loss of muscle fibers, persistent strength deficits, and chronic disability. A crucial challenge to VML injury and possible regeneration is the removal of all of the in situ native elements necessary for skeletal muscle regeneration. Our first goal was to establish a reliable VML model in the mouse tibialis anterior (TA) muscle. In adult male wild-type and nude mice, a non-repaired ≈20% VML injury to the TA muscle resulted in an ≈59% loss in nerve evoked muscle strength, ≈33% loss in muscle mass, and ≈29% loss of muscle fibers at 28 day post-injury...
April 2017: Physiological Reports
https://www.readbyqxmd.com/read/28397982/generation-of-chimeric-minipigs-by-aggregating-4-to-8-cell-stage-blastomeres-from-somatic-cell-nuclear-transfer-with-the-tracing-of-enhanced-green-fluorescent-protein
#20
Huili Ji, Chuan Long, Chong Feng, Ningning Shi, Yingdi Jiang, Guomin Zeng, Xirui Li, Jingjing Wu, Lin Lu, Shengsheng Lu, Dengke Pan
BACKGROUND: Blastocyst complementation is an important technique for generating chimeric organs in organ-deficient pigs, which holds great promise for solving the problem of a shortage of organs for human transplantation procedures. Porcine chimeras have been generated using embryonic germ cells, embryonic stem cells, and induced pluripotent stem cells; however, there are no authentic pluripotent stem cells for pigs. In previous studies, blastomeres from 4- to 8-cell-stage parthenogenetic embryos were able to generate chimeric fetuses efficiently, but the resulting fetuses did not produce live-born young...
April 11, 2017: Xenotransplantation
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