keyword
MENU ▼
Read by QxMD icon Read
search

Muscle protein synthesis

keyword
https://www.readbyqxmd.com/read/27919820/tnf-%C3%AE-and-cancer-cachexia-molecular-insights-and-clinical-implications
#1
REVIEW
Hetal J Patel, Bhoomika M Patel
Cancer cachexia characterized by a chronic wasting syndrome, involves skeletal muscle loss and adipose tissue loss and resistance to conventional nutritional support. Cachexia is responsible for the reduction in quality and length of life of cancer patients. It also decreases the muscle strength of the patients. The pro-inflammatory and pro-cachectic factors produced by the tumor cells have important role in genesis of cachexia. A number of pro-inflammatory cytokines, like interleukin-1 (IL-1), IL-6, tumor necrosis factor- alpha (TNF-α) may have important role in the pathological mechanisms of cachexia in cancer...
December 2, 2016: Life Sciences
https://www.readbyqxmd.com/read/27918964/sarcopenia-in-older-mice-is-characterized-by-a-decreased-anabolic-response-to-a-protein-meal
#2
Miriam van Dijk, Jolanda Nagel, Francina J Dijk, Jerôme Salles, Sjors Verlaan, Stephane Walrand, Klaske van Norren, Yvette Luiking
Ageing is associated with sarcopenia, a progressive decline of skeletal muscle mass, muscle quality and muscle function. Reduced sensitivity of older muscles to respond to anabolic stimuli, i.e. anabolic resistance, is part of the underlying mechanisms. Although, muscle parameters have been studied in mice of various ages/strains; the aim was to study if mice display similar deteriorating processes as human ageing. Therefore, 10,16,21 and 25 months-old C57BL6/6J male mice were studied to measure parameters of sarcopenia and factors contributing to its pathophysiology, with the aim of characterizing sarcopenia in old mice...
November 27, 2016: Archives of Gerontology and Geriatrics
https://www.readbyqxmd.com/read/27916799/pre-sleep-protein-ingestion-to-improve-the-skeletal-muscle-adaptive-response-to-exercise-training
#3
REVIEW
Jorn Trommelen, Luc J C van Loon
Protein ingestion following resistance-type exercise stimulates muscle protein synthesis rates, and enhances the skeletal muscle adaptive response to prolonged resistance-type exercise training. As the adaptive response to a single bout of resistance exercise extends well beyond the first couple of hours of post-exercise recovery, recent studies have begun to investigate the impact of the timing and distribution of protein ingestion during more prolonged recovery periods. Recent work has shown that overnight muscle protein synthesis rates are restricted by the level of amino acid availability...
November 28, 2016: Nutrients
https://www.readbyqxmd.com/read/27916644/targeted-mitochondrial-uncoupling-beyond-ucp1-the-fine-line-between-death-and-metabolic-health
#4
REVIEW
Mario Ost, Susanne Keipert, Susanne Klaus
In the early 1930s, the chemical uncoupling agent 2,4-dinitrophenol (DNP) was promoted for the very first time as a powerful and effective weight loss pill but quickly withdrawn from the market due to its lack of tissue-selectivity with resulting dangerous side effects, including hyperthermia and death. Today, novel mitochondria- or tissue-targeted chemical uncouplers with higher safety and therapeutic values are under investigation in order to tackle obesity, diabetes and fatty liver disease. Moreover, in the past 20 years, transgenic mouse models were generated to understand the molecular and metabolic consequences of targeted uncoupling, expressing functional uncoupling protein 1 (UCP1) ectopically in white adipose tissue or skeletal muscle...
December 1, 2016: Biochimie
https://www.readbyqxmd.com/read/27913948/branched-chain-amino-acids-administration-suppresses-endurance-exercise-related-activation-of-ubiquitin-proteasome-signaling-in-trained-human-skeletal-muscle
#5
Evgeny A Lysenko, Tatiana F Vepkhvadze, Egor M Lednev, Olga L Vinogradova, Daniil V Popov
We tested whether post exercise ingestion of branched-chain amino acids (BCAA < 10 g) is sufficient to activate signaling associated with muscle protein synthesis and suppress exercise-induced activation of mechanisms associated with proteolysis in endurance-trained human skeletal muscle. Nine endurance-trained athletes performed a cycling bout with and without BCAA ingestion (0.1 g/kg). Post exercise ACC(Ser79/222) phosphorylation (endogenous marker of AMPK activity) was increased (~3-fold, P < 0...
December 3, 2016: Journal of Physiological Sciences: JPS
https://www.readbyqxmd.com/read/27909410/mechanosensitive-molecular-networks-involved-in-transducing-resistance-exercise-signals-into-muscle-protein-accretion
#6
REVIEW
Emil Rindom, Kristian Vissing
Loss of skeletal muscle myofibrillar protein with disease and/or inactivity can severely deteriorate muscle strength and function. Strategies to counteract wasting of muscle myofibrillar protein are therefore desirable and invite for considerations on the potential superiority of specific modes of resistance exercise and/or the adequacy of low load resistance exercise regimens as well as underlying mechanisms. In this regard, delineation of the potentially mechanosensitive molecular mechanisms underlying muscle protein synthesis (MPS), may contribute to an understanding on how differentiated resistance exercise can transduce a mechanical signal into stimulation of muscle accretion...
2016: Frontiers in Physiology
https://www.readbyqxmd.com/read/27909227/castration-alters-protein-balance-following-high-frequency-muscle-contraction
#7
Jennifer L Steiner, David H Fukuda, Michael L Rossetti, Jay R Hoffman, Bradley S Gordon
Resistance exercise increases muscle mass by shifting protein balance in favor of protein accretion. Androgens independently alter protein balance, but it is unknown whether androgens alter this measure following resistance exercise. To answer this, male mice were subjected to sham or castration surgery 7-8 weeks prior to undergoing a bout of unilateral, high frequency, electrically induced muscle contractions in the fasted or refed state. Puromycin was injected 30 min prior to sacrifice to measure protein synthesis...
December 1, 2016: Journal of Applied Physiology
https://www.readbyqxmd.com/read/27903833/meal-distribution-of-dietary-protein-and-leucine-influences-long-term-muscle-mass-and-body-composition-in-adult-rats
#8
Layne E Norton, Gabriel J Wilson, Christopher J Moulton, Donald K Layman
BACKGROUND: Protein quantity and quality at a meal affect muscle protein synthesis (MPS); however, long-term effects of protein distribution at individual meals on adult muscle mass remain unknown. OBJECTIVE: We used a precise feeding protocol in adult rats to determine if optimizing postmeal MPS response by modifying the meal distribution of protein, and the amino acid leucine (Leu), would affect muscle mass. METHODS: Two studies were conducted with the use of male Sprague-Dawley rats (∼300 g) trained to consume 3 meals/d, then assigned to diet treatments with identical macronutrient contents (16% of energy from protein, 54% from carbohydrates, and 30% from fat) but differing in protein quality or meal distribution...
November 30, 2016: Journal of Nutrition
https://www.readbyqxmd.com/read/27903518/habituation-to-low-or-high-protein-intake-does-not-modulate-basal-or-postprandial-muscle-protein-synthesis-rates-a-randomized-trial
#9
Stefan Hm Gorissen, Astrid Mh Horstman, Rinske Franssen, Imre Wk Kouw, Benjamin T Wall, Nicholas A Burd, Lisette Cpgm de Groot, Luc Jc van Loon
BACKGROUND: Muscle mass maintenance is largely regulated by basal muscle protein synthesis rates and the ability to increase muscle protein synthesis after protein ingestion. To our knowledge, no previous studies have evaluated the impact of habituation to either low protein intake (LOW PRO) or high protein intake (HIGH PRO) on the postprandial muscle protein synthetic response. OBJECTIVE: We assessed the impact of LOW PRO compared with HIGH PRO on basal and postprandial muscle protein synthesis rates after the ingestion of 25 g whey protein...
November 30, 2016: American Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/27897418/suppression-of-muscle-wasting-by-the-plant-derived-compound-ursolic-acid-in-a-model-of-chronic-kidney-disease
#10
Rizhen Yu, Ji-An Chen, Jing Xu, Jin Cao, Yanlin Wang, Sandhya S Thomas, Zhaoyong Hu
BACKGROUND: Muscle wasting in chronic kidney disease (CKD) and other catabolic disorders contributes to morbidity and mortality, and there are no therapeutic interventions that regularly and safely block losses of muscle mass. We have obtained evidence that impaired IGF-1/insulin signalling and increases in glucocorticoids, myostatin and/or inflammatory cytokines that contribute to the development of muscle wasting in catabolic disorders by activating protein degradation. METHODS: Using in vitro and in vivo models of muscle wasting associated with CKD or dexamethasone administration, we measured protein synthesis and degradation and examined mechanisms by which ursolic acid, derived from plants, could block the loss of muscle mass stimulated by CKD or excessive levels of dexamethasone...
November 17, 2016: Journal of Cachexia, Sarcopenia and Muscle
https://www.readbyqxmd.com/read/27884442/the-induction-of-the-collagen-capsule-synthesis-by-trichinella-spiralis-is-closely-related-to-protease-activated-receptor-2
#11
Mi Kyung Park, Min Kyoung Cho, Shin Ae Kang, Bo Young Kim, Hak Sun Yu
The muscle-stage larvae of the parasite Trichinella spiralis have the ability to survive within host muscle tissue by virtue of the formation a nurse cell-parasite complex, which is surrounded by collagen. The formation of the complex is initiated by excretory-secretory (ES) proteins produced by the parasite. To determine the mechanisms underlying collagen capsule formation, we investigated the expression levels of several types of collagen genes and TGF-βI signaling-related genes (Smad2 and Smad3) in muscle cells...
October 30, 2016: Veterinary Parasitology
https://www.readbyqxmd.com/read/27880847/activation-of-both-the-calpain-and-ubiquitin-proteasome-systems-contributes-to-septic-cardiomyopathy-through-dystrophin-loss-disruption-and-mtor-inhibition
#12
Ana Caroline Silva Freitas, Maria Jose Figueiredo, Erica Carolina Campos, Danilo Figueiredo Soave, Simone Gusmao Ramos, Herbert B Tanowitz, Mara Rúbia N Celes
Cardiac dysfunction caused by the impairment of myocardial contractility has been recognized as an important factor contributing to the high mortality in sepsis. Calpain activation in the heart takes place in response to increased intracellular calcium influx resulting in proteolysis of structural and contractile proteins with subsequent myocardial dysfunction. The purpose of the present study was to test the hypothesis that increased levels of calpain in the septic heart leads to disruption of structural and contractile proteins and that administration of calpain inhibitor-1 (N-acetyl-leucinyl-leucinyl-norleucinal (ALLN)) after sepsis induced by cecal ligation and puncture prevents cardiac protein degradation...
2016: PloS One
https://www.readbyqxmd.com/read/27875962/the-beneficial-effects-of-taurine-to-counteract-sarcopenia
#13
Bianca M Scicchitano, Gigliola Sica
Aging is a multifactorial process characterized by several features including low-grade inflammation, increased oxidative stress and reduced regenerative capacity, which ultimately lead to alteration in morpho-functional properties of skeletal muscle, thus promoting sarcopenia. This condition is characterized by a gradual loss of muscle mass due to an unbalance between protein synthesis and degradation, finally conveying in functional decline and disability. The development of specific therapeutic approaches able to block or reverse this condition may represent an invaluable tool for the promotion of a healthy aging among elderly...
November 22, 2016: Current Protein & Peptide Science
https://www.readbyqxmd.com/read/27875947/skeletal-muscle-insulin-resistance-as-a-precursor-to-diabetes-beyond-glucoregulation
#14
Nicholas P Greene, Jacob L Brown, Megan E Rosa-Caldwell, David E Lee, Thomas A Blackwell, Tyrone A Washington
Prevalence of Type 2 Diabetes Mellitus (T2DM) has reached pandemic levels in Western societies. T2DM begins with the development of peripheral insulin resistance which prior research suggests may commonly originate within skeletal muscle. A number of mechanisms have been proposed for the development of muscle insulin resistance including those of classical glucose handling, but also other cellular derangements observed in this disease which include mitochondrial degeneration, alterations in muscle protein turnover and early evidences for dysregulation of microRNAs...
November 22, 2016: Current Diabetes Reviews
https://www.readbyqxmd.com/read/27875290/whole-body-protein-turnover-and-net-protein-balance-after-pediatric-thoracic-surgery-a-noninvasive-single-dose-15n-glycine-stable-isotope-protocol-with-end-product-enrichment
#15
Brenna S Fullerton, Eric A Sparks, Faraz A Khan, Jeremy G Fisher, Rocco Anzaldi, Michael R Scoville, Yong-Ming Yu, David A Wagner, Tom Jaksic, Nilesh M Mehta
BACKGROUND: We used the (15)N glycine urinary end-product enrichment technique to quantify whole body protein turnover following thoracic surgery. MATERIALS AND METHODS: A single dose of (15)N glycine (2 mg/kg) was administered orally on postoperative day 1 to children (1-18 years) following thoracic surgery. (15)N enrichment of ammonia and urea was measured in mixed urine after 12 and 24 hours, respectively, and protein synthesis, breakdown, and net balance determined...
November 15, 2016: JPEN. Journal of Parenteral and Enteral Nutrition
https://www.readbyqxmd.com/read/27874066/cl316-243-a-%C3%AE-3-adrenergic-receptor-agonist-induces-muscle-hypertrophy-and-increased-strength
#16
Daniela Puzzo, Roberto Raiteri, Clotilde Castaldo, Raffaele Capasso, Ester Pagano, Mariateresa Tedesco, Walter Gulisano, Lisaveta Drozd, Pellegrino Lippiello, Agostino Palmeri, Pietro Scotto, Maria Concetta Miniaci
Studies in vitro have demonstrated that β3-adrenergic receptors (β3-ARs) regulate protein metabolism in skeletal muscle by promoting protein synthesis and inhibiting protein degradation. In this study, we evaluated whether activation of β3-ARs by the selective agonist CL316,243 modifies the functional and structural properties of skeletal muscles of healthy mice. Daily injections of CL316,243 for 15 days resulted in a significant improvement in muscle force production, assessed by grip strength and weight tests, and an increased myofiber cross-sectional area, indicative of muscle hypertrophy...
November 22, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27866827/nucleoprotein-supplementation-enhances-the-recovery-of-rat-soleus-mass-with-reloading-after-hindlimb-unloading-induced-atrophy-via-myonuclei-accretion-and-increased-protein-synthesis
#17
Ryosuke Nakanishi, Yusuke Hirayama, Minoru Tanaka, Noriaki Maeshige, Hiroyo Kondo, Akihiko Ishihara, Roland R Roy, Hidemi Fujino
Hindlimb unloading results in muscle atrophy and a period of reloading has been shown to partially recover the lost muscle mass. Two of the mechanisms involved in this recovery of muscle mass are the activation of protein synthesis pathways and an increase in myonuclei number. The additional myonuclei are provided by satellite cells that are activated by the mechanical stress associated with the reloading of the muscles and eventually incorporated into the muscle fibers. Amino acid supplementation with exercise also can increase skeletal muscle mass through enhancement of protein synthesis and nucleotide supplements can promote cell cycle activity...
October 23, 2016: Nutrition Research
https://www.readbyqxmd.com/read/27866347/effect-of-low-intensity-resistance-training-with-heat-stress-on-the-hsp72-anabolic-hormones-muscle-size-and-strength-in-elderly-women
#18
Sung Jin Yoon, Moon Jin Lee, Hyo Min Lee, Jin Seok Lee
BACKGROUND: Several recent studies have reported that heat stress stimulates the activation of heat shock protein 72 (HSP72), leading to an increase in muscle synthesis. Some studies suggested that low-intensity resistance training combined with heat stress could improve muscle size and strength. AIM: This study aimed to identify the effect of low-intensity resistance training with heat stress over 12 weeks on the HSP72, anabolic hormones, muscle size, and strength in elderly women...
November 19, 2016: Aging Clinical and Experimental Research
https://www.readbyqxmd.com/read/27865617/panaxatriol-derived-from-ginseng-augments-resistance-exercised-induced-protein-synthesis-via-mtorc1-signaling-in-rat-skeletal-muscle
#19
Yusuke Takamura, Yuhei Makanae, Satoru Ato, Naomi Yoshii, Kohei Kido, Mitsuru Nomura, Akira Uchiyama, Naruhiro Shiozawa, Satoshi Fujita
Resistance exercise activates muscle protein synthesis via the mammalian target of rapamycin complex 1 (mTORC1) pathway and subsequent muscle hypertrophy. Upstream components of the mTORC1 pathway are widely known to be involved in Akt and extracellular signal-regulated kinase 1/2 (ERK1/2) signaling. Previous studies have shown that ginseng stimulated Akt and ERK1/2 signaling. Therefore, we hypothesized that panaxatriol (PT) derived from ginseng triggers mTORC1 signaling and muscle protein synthesis by activating both the Akt and ERK1/2 signaling pathways, and that PT additively stimulates muscle protein synthesis when combined with resistance exercise...
September 13, 2016: Nutrition Research
https://www.readbyqxmd.com/read/27861863/exploring-the-role-of-pgc-1%C3%AE-in-defining-nuclear-organisation-in-skeletal-muscle-fibres
#20
Jacob A Ross, Adam Pearson, Yotam Levy, Bettina Cardel, Christoph Handschin, Julien Ochala
Muscle fibres are multinucleated cells, with each nucleus controlling the protein synthesis in a finite volume of cytoplasm termed the myonuclear domain (MND). What determines MND size remains unclear. In the present study, we aimed to test the hypothesis that the level of expression of the transcriptional coactivator PGC-1α and subsequent activation of the mitochondrial biogenesis are major contributors. Hence, we used two transgenic mouse models with varying expression of PGC-1α in skeletal muscles. We isolated myofibres from the fast twitch extensor digitorum longus (EDL) and slow twitch diaphragm muscles...
November 7, 2016: Journal of Cellular Physiology
keyword
keyword
33730
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"