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muscle protein degradation

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https://www.readbyqxmd.com/read/28330073/cladosporium-cladosporioides-from-the-perspectives-of-medical-and-biotechnological-approaches
#1
REVIEW
Manaf AlMatar, Essam A Makky
Fungi are important natural product sources that have enormous potential for the production of novel compounds for use in pharmacology, agricultural applications and industry. Compared with other natural sources such as plants, fungi are highly diverse but understudied. However, research on Cladosporium cladosporioides revealed the existence of bioactive products such as p-methylbenzoic acid, ergosterol peroxide (EP) and calphostin C as well as enzymes including pectin methylesterase (PME), polygalacturonase (PG) and chlorpyrifos hydrolase...
June 2016: 3 Biotech
https://www.readbyqxmd.com/read/28321652/role-of-plasminogen-activator-inhibitor-1-in-glucocorticoid-induced-muscle-change-in-mice
#2
Yukinori Tamura, Naoyuki Kawao, Takeshi Shimoide, Kiyotaka Okada, Osamu Matsuo, Hiroshi Kaji
We recently revealed that plasminogen activator inhibitor-1 (PAI-1), a serine protease inhibitor, is involved in diabetes, osteoporosis and muscle wasting induced by glucocorticoid (GC) treatment in mice. In the present study, we investigated the detailed mechanisms by which GC induces muscle wasting through PAI-1 in vivo and in vitro. PAI-1 deficiency suppressed the mRNA levels of atrogin1 and muscle RING-Finger Protein 1 (MuRF1), ubiquitin ligases leading to muscle degradation, elevated by GC treatment in the gastrocnemius muscle of mice...
March 20, 2017: Journal of Bone and Mineral Metabolism
https://www.readbyqxmd.com/read/28318044/pathomechanisms-of-anti-cn1a-autoantibodies-in-sporadic-inclusion-body-myositis
#3
Nozomu Tawara, Satoshi Yamashita, Xiao Zhang, Mai Korogi, Ziwei Zhang, Tsukasa Doki, Yoshimasa Matsuo, Shunya Nakane, Yasushi Maeda, Kazuma Sugie, Naoki Suzuki, Masashi Aoki, Yukio Ando
OBJECTIVE: Sporadic inclusion body myositis (sIBM), an intractable progressive muscle disease, frequently occurs in older persons. sIBM pathogenesis may involve protein degradation dysfunction and immune abnormalities. Autoantibodies recognizing cytosolic 5'-nucleotidase 1A (cN1A) were found in plasma and serum from sIBM patients. Whether anti-cN1A autoantibodies play a pathogenic role in sIBM is controversial, however. This study investigated the pathogenic properties of anti-cN1A autoantibodies in sIBM pathogenesis...
March 20, 2017: Annals of Neurology
https://www.readbyqxmd.com/read/28317776/phosphorylation-inhibits-the-activity-of-%C3%AE-calpain-at-different-incubation-temperatures-and-ca-2-concentrations-in-vitro
#4
Manting Du, Xin Li, Zheng Li, Meng Li, Lingling Gao, Dequan Zhang
This study aimed to investigate the effects of phosphorylation on the activity of μ-calpain and its sensitivity to temperature and Ca(2+). For temperature sensitivity analysis, sarcoplasmic protein was treated with alkaline phosphatase (AP) and phosphatase inhibitor (PI) at 4, 25 and 37°C. The results showed that the degradation degree of μ-calpain in the AP group was significantly higher after incubation for 12h. For calcium sensitivity analysis, samples treated with AP and PI were incubated at 0.01, 0...
August 1, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28315275/sigma-1-receptor-in-motoneuron-disease
#5
Renzo Mancuso, Xavier Navarro
Amyotrophic Lateral Sclerosis (ALS ) is a neurodegenerative disease affecting spinal cord and brain motoneurons , leading to paralysis and early death. Multiple etiopathogenic mechanisms appear to contribute in the development of ALS , including glutamate excitotoxicity, oxidative stress , protein misfolding, mitochondrial defects, impaired axonal transport, inflammation and glial cell alterations. The Sigma-1 receptor is highly expressed in motoneurons of the spinal cord, particularly enriched in the endoplasmic reticulum (ER) at postsynaptic cisternae of cholinergic C-terminals...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28304086/influence-of-modified-atmosphere-packaging-on-protein-oxidation-calpain-activation-and-desmin-degradation-of-beef-muscles
#6
Qing-Quan Fu, Qing-Feng Ge, Rui Liu, Hai-Ou Wang, Guang-Hong Zhou, Wan-Gang Zhang
BACKGROUND: Protein oxidation is widespread in biochemical systems. The objective of the study was to investigate the differences in protein oxidation, μ-calpain activity, desmin proteolysis and protein solubility of beef psoas major (PM) and semimembranosus (SM) muscles under three packaging systems during postmortem aging. At 24 h postmortem, beef muscles were packaged respectively in air-permeable film overwrap (AP), vacuum pack (VP) or modified atmosphere (MAP, 80% O2 + 20% CO2 ), and then displayed for 10 days (d) at 4 °C...
March 17, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28299852/energy-and-protein-requirements-for-growth-of-holstein%C3%A2-%C3%A3-%C3%A2-gyr-heifers
#7
F A S Silva, S C Valadares Filho, L N Rennó, D Zanetti, L F Costa E Silva, L A Godoi, J M P Vieira, A C B Menezes, P Pucetti, P P Rotta
There is little information regarding the nutritional requirements for dairy heifers, leading the majority of nutrient requirement systems to consider dairy heifers to be similar to beef heifers. Therefore, we evaluated the muscle protein metabolism and physical and chemical body composition of growing Holstein × Gyr heifers and estimated the energy and protein requirements. We performed a comparative slaughter experiment with 20 Holstein × Gyr heifers at an initial body weight of 218 ± 36.5 kg and an average age of 12 ± 1...
March 16, 2017: Journal of Animal Physiology and Animal Nutrition
https://www.readbyqxmd.com/read/28299793/foxo1-ampk-ulk1-regulates-ethanol-induced-autophagy-in-muscle-by-enhanced-atg14-association-with-the-becn1-pik3c3-complex
#8
Ly Q Hong-Brown, C Randell Brown, Maithili Navaratnarajah, Charles H Lang
BACKGROUND: Excessive alcohol (EtOH) consumption causes imbalances in protein metabolism. EtOH impairs protein synthesis in C2C12 myoblasts via a FoxO1-AMPK-TSC2-mTORC1 pathway and also induces degradation. As the underlying regulatory signaling cascades for these processes are currently poorly defined, we tested the hypothesis that alcohol-induced autophagy is mediated via activation of the PIK3C3 complex that is regulated by FoxO1-AMPK. METHODS: C2C12 myoblasts were incubated with EtOH for various periods of time and autophagy pathway-related proteins were assessed by Western blotting and immunoprecipitation...
March 16, 2017: Alcoholism, Clinical and Experimental Research
https://www.readbyqxmd.com/read/28291660/degradation-of-endothelial-network-in-disordered-tumor-containing-cell-sheet
#9
Menglu Li, Masahiro Kino-Oka
Tumor angiogenesis is an important event in tumor malignancy; and the vasculature formed in tumor region is typically dysfunctional. Multiple factors are associated with tumor vessel abnormalities, but the precise mechanism has not been fully understood. In the present study, a tumor-containing cell sheet was prepared by mixing a small population of human embryonal rhabdomyosarcoma (RMS) cells (RDs) with human skeletal muscle myoblasts (HSMMs) to mimic muscle tissue invaded by RMS cells. Sheet fluidity and the extracellular matrix (ECM) meshwork of the tumor-containing cell sheet were found to be elevated and disordered, demonstrating the disruptive effect of tumor cells on sheet structure...
March 10, 2017: Journal of Bioscience and Bioengineering
https://www.readbyqxmd.com/read/28288890/abdominal-aortic-aneurysm-associated-microrna-516a-5p-regulates-expressions-of-methylenetetrahydrofolate-reductase-matrix-metalloproteinase-2-and-tissue-inhibitor-of-matrix-metalloproteinase-1-in-human-abdominal-aortic-vascular-smooth-muscle-cells
#10
Crystal Yin Tung Chan, Bernice Lai Yee Cheuk, Stephen Wing Keung Cheng
OBJECTIVE: MicroRNAs (miRNAs or miRs) have been highlighted to be involved in abdominal aortic aneurysm (AAA) with the emergence of recent miRNA microarray profiling studies. miR-516a-5p has been shown to be significantly overexpressed in vascular smooth muscle cells (VSMCs) from human AAA tissues from our previous microarray study, suggesting its crucial association with AAA. In addition, further bioinformatics analysis predicted methylenetetrahydrofolate reductase (MTHFR), which regulates homocysteine (Hcy) metabolism and is proposed to be a risk gene for AAA formation, to be the down-regulation target of miR-516a-5p...
March 10, 2017: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/28284116/effects-of-pentachlorophenol-on-the-quail-coturnix-japonica-liver-detoxification-pathway
#11
Peng Jiang, Jianshe Wang, Nan Sheng, Dongbing Wei, Jiayin Dai
Pentachlorophenol (PCP), an extensively used pesticide and biocide, is of critical environmental concern due to its toxicity and recalcitrance to degradation. In this study, the effect of PCP on induction of transcription factors, cytochrome P450 (CYP450) genes, and the antioxidative enzyme system were investigated in the quail liver. A total of 60 (4- to 6-week-old) male quails (Coturnix japonica) were administered 0, 0.05, 0.5, and 5 mg/kg/d PCP orally for 42 d. Following exposure, both absolute and relative liver weights were significantly lower than those of the control...
March 2, 2017: Chemosphere
https://www.readbyqxmd.com/read/28283184/angiotensin-1-7-regulates-angiotensin-ii-induced-matrix-metalloproteinase-8-in-vascular-smooth-muscle-cells
#12
Feng Zhang, Sufang Li, Junxian Song, Jun Liu, Yuxia Cui, Hong Chen
BACKGROUND AND AIMS: Angiotensin II (Ang II) is a bioactive peptide that is related to cardiovascular disease such as atherosclerosis, whereas angiotensin-(1-7) (Ang-(1-7)) is a counter-regulator of angiotensin II, which protects against cardiovascular disease. Matrix metalloproteinase 8 (MMP-8) is thought to participate in plaque destabilization though degradation of extracellular matrix, improving the development of atherosclerosis. Whether Ang-(1-7) modulates Ang II-induced MMP-8 remains unclear...
February 21, 2017: Atherosclerosis
https://www.readbyqxmd.com/read/28282565/genome-wide-identification-and-characterization-of-conserved-and-novel-micrornas-in-grass-carp-ctenopharyngodon-idella-by-deep-sequencing
#13
Wangbao Gong, Yong Huang, Jun Xie, Guangjun Wang, Deguang Yu, Xihong Sun
MicroRNAs (miRNAs) are post-transcriptional regulators which bind to target to regulate protein expression by repressing translation or promoting degradation of the target mRNA. Studies have shown that deep sequencing is a powerful tool for the identification of miRNAs, and it is believed that may more miRNAs remain to be discovered in grass carp. In the present study, a pool of equal amounts of RNA obtained from 8 different adult grass carp tissues (spleen, liver, muscle, kidney, skin, testis, gut and heart) was sequenced using deep sequencing technology...
March 2, 2017: Computational Biology and Chemistry
https://www.readbyqxmd.com/read/28278160/hyperleptinemia-in-children-with-autosomal-recessive-spinal-muscular-atrophy-type-i-iii
#14
Heike Kölbel, Berthold P Hauffa, Stefan A Wudy, Anastasios Bouikidis, Adela Della Marina, Ulrike Schara
BACKGROUND: Autosomal-recessive proximal spinal muscular atrophies (SMA) are disorders characterized by a ubiquitous deficiency of the survival of motor neuron protein that leads to a multisystemic disorder, which mostly affects alpha motor neurons. Disease progression is clinically associated with failure to thrive or weight loss, mainly caused by chewing and swallowing difficulties. Although pancreatic involvement has been described in animal models, systematic endocrinological evaluation of the energy metabolism in humans is lacking...
2017: PloS One
https://www.readbyqxmd.com/read/28272266/lack-of-activation-of-mitophagy-during-endurance-exercise-in-human
#15
Céline Schwalm, Louise Deldicque, Marc Francaux
PURPOSE: To determine whether fission and mitophagy are activated by acute endurance exercise in human skeletal muscle and to investigate if this activation is dependent upon the nutritional state. METHODS: Trained athletes (n = 7) cycled for 2 h at 70% VO2 peak in a fed or fasted state. Vastus lateralis muscle biopsies were obtained at baseline, before, immediately after and 1 h after exercise. Protein and mRNA markers for mitophagy, mitochondrial biogenesis, fission and fusion were analyzed using qRT-PCR and Western blot...
March 8, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28265368/bioactivities-of-coturnix-japonica-quail-egg-yolk-and-albumen-against-physiological-stress
#16
Gideon O Oladipo, Emmanuel O Ibukun
Cold and immobilization stressors can generate oxidative stress as well as skeletal muscle fatigue. Free radicals cause oxidative degradation of lipids, proteins, nucleic acids, and carbohydrates molecules thereby compromising cell integrity and function. Coturnix japonica (quail) egg had been described as being very functional biochemically, due to the essential biomolecules it contains in very regulated quantity. This study was designed to evaluate the in vitro antioxidant activity of extracts of quail egg yolk and the albumen...
March 2017: Food Science & Nutrition
https://www.readbyqxmd.com/read/28260498/treatment-with-proprotein-convertase-subtilisin-kexin-type-9-pcsk9-inhibitors-to-reduce-cardiovascular-inflammation-and-outcomes
#17
Aldo Bonaventura, Federico Carbone, Alessandra Vecchié, Franco Dallegri, Giovanni G Camici, Fabrizio Montecucco, Luca Liberale
Proprotein Convertase Subtilisin/Kexin type 9 (PCSK9) is a serine protease involved in cholesterol homeostasis. After binding to the complex low-density lipoprotein (LDL)-receptor, PCSK9 induces its intracellular degradation, thus reducing serum LDL clearance. PCSK9 is mainly secreted by the liver, but it is also expressed to a lesser extent in other organs. Apart from the well-known activity concerning hepatic LDL receptor-mediated pathway, PCSK9 has been supposed to potentially interfere with vascular inflammation in atherogenesis...
March 3, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28260031/low-concentrations-of-bilirubin-inhibit-activation-of-hepatic-stellate-cells-in%C3%A2-vitro
#18
Yinhe Tang, Qiyu Zhang, Yefan Zhu, Gang Chen, Fuxiang Yu
Hepatic stellate cell (HSC) activation serves a key role in liver fibrosis, and is associated with chronic liver diseases. Bilirubin, a product of heme degradation, has been demonstrated to have antioxidant properties. The present study investigated the effects of physiological concentrations of bilirubin on rat HSC activation. Rat HSCs were isolated and cultured for several generations to induce activation. The activated HSCs were subsequently treated with 0, 1, 10 or 20 mg/l bilirubin and assayed for parameters of cell activation...
February 14, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28259568/chloroquine-improves-the-response-to-ischemic-muscle-injury-and-increases-hmgb1-after-arterial-ligation
#19
Jun Xu, Xiangdong Cui, Jiehua Li, Panagiotis Koutakis, Iraklis Pipinos, Edith Tzeng, Alex Chen, Ulka Sachdev
OBJECTIVE: We have previously shown that exogenous administration of the nuclear protein high mobility group box 1 (HMGB1) improves angiogenesis after tissue ischemia. Antagonizing HMGB1 prolongs muscle necrosis and deters regeneration. In this study, we evaluated HMGB1 expression in peripheral arterial disease (PAD) and the mechanisms that promote its release in a murine model of hindlimb ischemia. Specifically, we investigated how chloroquine (CQ), a commonly employed disease-modifying antirheumatic drug, promotes HMGB1 release from muscle...
March 1, 2017: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/28248228/role-of-protein-carbonylation-in-skeletal-muscle-mass-loss-associated-with-chronic-conditions
#20
REVIEW
Esther Barreiro
Muscle dysfunction, characterized by a reductive remodeling of muscle fibers, is a common systemic manifestation in highly prevalent conditions such as chronic heart failure (CHF), chronic obstructive pulmonary disease (COPD), cancer cachexia, and critically ill patients. Skeletal muscle dysfunction and impaired muscle mass may predict morbidity and mortality in patients with chronic diseases, regardless of the underlying condition. High levels of oxidants may alter function and structure of key cellular molecules such as proteins, DNA, and lipids, leading to cellular injury and death...
May 6, 2016: Proteomes
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