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https://www.readbyqxmd.com/read/29674281/effects-of-tocotrienol-from-bixa-orellana-annatto-on-bone-histomorphometry-in-a-male-osteoporosis-model-induced-by-buserelin
#1
Nur-Vaizura Mohamad, Ima-Nirwana Soelaiman, Kok-Yong Chin
INTRODUCTION: Osteoporosis is a debilitating skeletal side effect of androgen deprivation therapy based on gonadotropin-releasing hormone (GnRH) agonist in men. Tocotrienol from Bixa orellana (annatto) has been demonstrated to offer protection against osteoporosis by exerting anabolic effects on bone. Thus, it may prevent osteoporosis among GnRH agonist users. OBJECTIVE: This study aimed to determine the effectiveness of annatto-tocotrienol on the bone turnover markers and bone histomorphometry in a model of male osteoporosis induced by buserelin (a GnRH agonist)...
April 16, 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29672220/environmental-hypoxia-favors-myoblast-differentiation-and-fast-phenotype-but-blunts-activation-of-protein-synthesis-after-resistance-exercise-in-human-skeletal-muscle
#2
Olouyomi Gnimassou, Rodrigo Fernández-Verdejo, Matthew Brook, Damien Naslain, Estelle Balan, Mariwan Sayda, Jessica Cegielski, Henri Nielens, Anabelle Decottignies, Jean-Baptiste Demoulin, Kenneth Smith, Philip J Atherton, Marc Francaux, Louise Deldicque
We hypothesized that a single session of resistance exercise performed in moderate hypoxic (FiO2 : 14%) environmental conditions would potentiate the anabolic response during the recovery period spent in normoxia. Twenty subjects performed a 1-leg knee extension session in normoxic or hypoxic conditions. Muscle biopsies were taken 15 min and 4 h after exercise in the vastus lateralis of the exercised and the nonexercised legs. Blood and saliva samples were taken at regular intervals before, during, and after the exercise session...
April 19, 2018: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/29670477/prevalence-attitude-knowledge-and-practice-of-anabolic-androgenic-steroid-aas-use-among-gym-participants
#3
Sami D Althobiti, Nassar M Alqurashi, Abdulmajeed S Alotaibi, Turki F Alharthi, Khaled A Alswat
Background: Anabolic steroids (AS) are synthetic testosterone derivatives that last longer than physiological androgens in the body. Anabolic-androgenic steroid (AAS) abuse is spreading among athletes. The aim of this study is to assess the knowledge, attitudes, and practices of gym participants in Saudi Arabia. Methods: A cross-sectional survey was carried out among gym users from February 2017 to May 2017. The questionnaire included information on demographics related to the use of AAS and lifestyle habits...
March 2018: Materia Socio-medica
https://www.readbyqxmd.com/read/29669743/modulation-of-the-secretory-pathway-by-amino-acid-starvation
#4
REVIEW
Wessel van Leeuwen, Felix van der Krift, Catherine Rabouille
As a major anabolic pathway, the secretory pathway needs to adapt to the demands of the surrounding environment and responds to different exogenous signals and stimuli. In this context, the transport in the early secretory pathway from the endoplasmic reticulum (ER) to the Golgi apparatus appears particularly regulated. For instance, protein export from the ER is critically stimulated by growth factors. Conversely, nutrient starvation also modulates functions of the early secretory pathway in multiple ways...
April 18, 2018: Journal of Cell Biology
https://www.readbyqxmd.com/read/29666529/natural-preservatives-for-superficial-scald-reduction-and-enhancement-of-protective-phenolic-linked-antioxidant-responses-in-apple-during-post-harvest-storage
#5
Dipayan Sarkar, Chandrakant Ankolekar, Duane Greene, Kalidas Shetty
Superficial scald during post-harvest storage is a serious problem for long-term preservation and shelf-life of some apple and pear cultivars. Development of superficial scald and related physiological disorders such as enzymatic and non-enzymatic browning are associated in part with oxidative breakdown and redox imbalance. Therefore, targeting natural antioxidants from food-grade sources as post-harvest treatment to reduce superficial scald has merit. Such natural antioxidants can potentially counter oxidation-linked damages associated with superficial scald through stimulation of antioxidant enzyme responses and biosynthesis of less-oxidized phenolics involving protective redox-linked pathway such as proline-associated pentose phosphate pathway...
May 2018: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/29666506/insights-into-aluminum-tolerance-pathways-in-stylosanthes-as-revealed-by-rna-seq-analysis
#6
Caode Jiang, Lusheng Liu, Xiaofeng Li, Rongrong Han, Yunmin Wei, Yongxiong Yu
Stylo has a great potential for Al3+ resistance in acidic soils through secretion of citrate from the roots. To get insight into the molecular mechanisms responsible, transcriptomic changes were investigated in the roots after treatment with T01 (-Al3+ , pH6.0), T02 (-Al3+ , pH4.3) and T03 (50 µM AlCl3 , pH4.3). In total, 83,197 unigenes generated from 130,933 contigs were obtained. Of them, 282, 148 and 816 differentially expressed unigenes (DEGs) were revealed in T01_vs_T02, T02_vs_T03 and T01_vs_T03 comparison, respectively (FDR < 0...
April 17, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29666162/two-abscisic-acid-responsive-plastid-lipase-genes-involved-in-jasmonic-acid-biosynthesis-in-arabidopsis-thaliana
#7
Kun Wang, Qiang Guo, John E Froehlich, Hope Lynn Hersh, Agnieszka Zienkiewicz, Gregg A Howe, Christoph Benning
Chloroplast membranes with their unique lipid composition are crucial for photosynthesis. Maintenance of the chloroplast membranes requires finely tuned lipid anabolic and catabolic reactions. Despite the presence of a large number of predicted lipid-degrading enzymes in the chloroplasts, their biological functions remain largely unknown. Recently, we described PLASTID LIPASE1 (PLIP1), a plastid phospholipase A1 that contributes to seed oil biosynthesis. The Arabidopsis thaliana genome encodes two putative PLIP1 paralogs, which we designated PLIP2 and PLIP3...
April 17, 2018: Plant Cell
https://www.readbyqxmd.com/read/29662200/targeting-sphingosine-1-phosphate-lyase-as-an-anabolic-therapy-for-bone-loss
#8
Sarah Weske, Mithila Vaidya, Alina Reese, Karin von Wnuck Lipinski, Petra Keul, Julia K Bayer, Jens W Fischer, Ulrich Flögel, Jens Nelsen, Matthias Epple, Marta Scatena, Edzard Schwedhelm, Marcus Dörr, Henry Völzke, Eileen Moritz, Anke Hannemann, Bernhard H Rauch, Markus H Gräler, Gerd Heusch, Bodo Levkau
Sphingosine-1-phosphate (S1P) signaling influences bone metabolism, but its therapeutic potential in bone disorders has remained unexplored. We show that raising S1P levels in adult mice through conditionally deleting or pharmacologically inhibiting S1P lyase, the sole enzyme responsible for irreversibly degrading S1P, markedly increased bone formation, mass and strength and substantially decreased white adipose tissue. S1P signaling through S1P2 potently stimulated osteoblastogenesis at the expense of adipogenesis by inversely regulating osterix and PPAR-γ, and it simultaneously inhibited osteoclastogenesis by inducing osteoprotegerin through newly discovered p38-GSK3β-β-catenin and WNT5A-LRP5 pathways...
April 16, 2018: Nature Medicine
https://www.readbyqxmd.com/read/29660668/supercritical-fluid-chromatography-applied-to-the-highly-selective-isolation-of-urinary-steroid-hormones-prior-to-gc-ms-analysis
#9
Mickael Doué, Caroline West, Emmanuelle Bichon, Bruno Le Bizec, Eric Lesellier
To assess the presence of prohibited anabolic substances used to promote growth in livestock, calf urine is the most relevant matrix. However, the sample preparation methods (required to remove unwanted matrix components and fractionate isobaric species that may be unresolved by gas chromatography- mass spectrometry GC/MS) are long and complex. In this context, semi-preparative supercritical fluid chromatography (SFC) was considered to possibly simplify the sample preparation in reducing the number of procedures...
April 12, 2018: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/29657200/complementary-bodybuilding-a-potential-risk-for-permanent-kidney-disease
#10
Wael El-Reshaid, Kamel El-Reshaid, Shaikha Al-Bader, Ahmad Ramadan, John Patrick Madda
We report our experience of renal disease associated with bodybuilders who had been on high-protein diet, anabolic androgenic steroids (AASs), and growth hormone (GH) for years. A total of 22 adult males who volunteered information about use of high protein diet and AAS or GH were seen over a six-year period with renal disease. Kidney biopsy revealed focal segmental glomerulosclerosis (FSGS) in eight, nephroangiosclerosis in four, chronic interstitial nephritis in three, acute interstitial nephritis in two, nephrocalcinosis with chronic interstitial nephritis in two, and single patients with membranous glomerulopathy, crescentic glomerulopathy, and sclerosing glomerulonephritis...
March 2018: Saudi Journal of Kidney Diseases and Transplantation
https://www.readbyqxmd.com/read/29652557/skeletal-response-to-treatment-with-teriparatide-tpd-after-bisphosphonate-in-post-menopausal-women-with-osteoporosis-and-a-high-prevalence-of-secondary-risk-factors-in-real-life-setting-of-a-metabolic-bone-clinic-effect-of-age-and-vitamin-d-status
#11
J Mok, C Brown, A E B Moore, S S Min, G Hampson
PURPOSE: Teriparatide (TPD) is a skeletal anabolic agent used in patients with severe post-menopausal osteoporosis (PMO) and steroid-induced osteoporosis who are at hish risk of fracture. Predictors of therapeutic response to teriparatide in real-life setting are not well characterised. We investigated potential factors associated with teriparatide response in post-menopausal women with established osteoporosis. METHODS: We carried out a retrospective survey of 48 women, aged 73...
April 13, 2018: Endocrine Research
https://www.readbyqxmd.com/read/29651261/defining-the-construct-of-synthetic-androgen-intoxication-an-application-of-general-brain-arousal
#12
Tom Hildebrandt, Ashley Heywood, Daniel Wesley, Kurt Schulz
Synthetic androgens (i. e., anabolic-androgenic steroids) are the primary component to the majority of problematic appearance and performance enhancing drug (APED) use. Despite evidence that these substances are associated with increased risk for aggression, violence, body image disturbances, and polypharmacy and can develop a pattern of chronic use consistent with drug dependence, there are no formal definitions of androgen intoxication. Consequently, the purpose of this paper is to establish a testable theory of androgen intoxication...
2018: Frontiers in Psychology
https://www.readbyqxmd.com/read/29649842/anabolic-activity-of-a-soy-extract-and-three-major-isoflavones-in-c2c12-myotubes
#13
Wenya Zheng, Marie L Hemker, Mingyong Xie, Sebastian T Soukup, Patrick Diel
Isoflavones have been reported to stimulate muscle growth. The aim of this in vitro study was to examine anabolic activity and associated molecular mechanisms of a soy extract (SoyEx), isoflavone aglycones, and a mixture simulating the composition of SoyEx in C2C12 myotubes. C2C12 cells were differentiated into myotubes. The effects of SoyEx, genistein, daidzein, glycitein, and the mixture of genistein-daidzein-glycitein (Mix) on myotube diameter and number were determined. In addition, the expression of genes and proteins associated with anabolic activity was analyzed...
April 12, 2018: Planta Medica
https://www.readbyqxmd.com/read/29649568/honokiol-alleviates-the-degeneration-of-intervertebral-disc-via-suppressing-the-activation-of-txnip-nlrp3-inflammasome-signal-pathway
#14
Pan Tang, Jia-Ming Gu, Zi-Ang Xie, Yu Gu, Zhi-Wei Jie, Kang-Mao Huang, Ji-Ying Wang, Shun-Wu Fan, Xue-Sheng Jiang, Zhi-Jun Hu
Intervertebral disc degeneration (IVDD) is a multifactorial disease and responsible for many spine related disorders, causes disability in the workforce and heavy social costs all over the world. Honokiol, a low molecular weight natural product, could penetrate into and distribute in IVDs to achieve therapeutic effect in a rat tail model. Therefore, the present study was undertaken to examine the antiinflammatory, antioxidation and chondroprotective effect of honokiol using nucleus pulposus cells and investigate its mechanisms to provide a new basis for future clinical treatment of IVDD...
April 9, 2018: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/29644572/low-magnitude-forces-for-bone-modeling-and-remodeling-in-dentofacial-orthopedics
#15
REVIEW
Achint Utreja
PURPOSE OF REVIEW: To examine the evidence in support of light continuous forces for enhancing bone adaptation (modeling and remodeling) in orthodontics and dentofacial orthopedics. RECENT FINDINGS: Clinical evidence suggests that light continuous orthodontic force can achieve physiologic expansion of the maxillary arch, but the long-term stability and the biological effects of the procedure are unclear. Compared to conventional orthodontic appliances that deliver heavy interrupted forces for tooth movement, the application of low-magnitude forces in animal models leads to anabolic modeling and remodeling of the alveolar bone in the path of orthodontic tooth movement...
April 11, 2018: Current Osteoporosis Reports
https://www.readbyqxmd.com/read/29628809/cytokine-involvement-in-biological-inflammation-related-to-degenerative-disorders-of-the-intervertebral-disk-a-narrative-review
#16
REVIEW
Christopher M De Geer
Objective: The purpose of this narrative literature review is to discuss the literature regarding the potential role that cytokines play in degenerative disk disease. Methods: The inclusion criteria were studies that used inflammatory mediators in advancing disk disease processes. Research studies were limited to the last 3 decades that had free full-text available online in English. Exclusion criteria were review articles and articles pertaining to temporomandibular joints and other joints of the body other than the intervertebral disk...
March 2018: Journal of Chiropractic Medicine
https://www.readbyqxmd.com/read/29627891/anabolic-agents-what-is-beyond-osteoporosis
#17
REVIEW
Y Liu, A E Levack, E Marty, O Or, B P Samuels, M Redko, J M Lane
Osteoporosis is a common skeletal disorder characterized by low bone mass, which leads to reduced bone strength and an increased risk of fractures. Anabolic agents have been shown to improve bone mass and decrease fracture risk in osteoporosis patients by directly stimulating osteoblasts to produce new bone. Currently, two anabolic agents are available in the USA: recombinantly produced teriparatide (TPTD), which is the fully active (1-34) amino active sequence of human parathyroid hormone (PTH), and abaloparatide (APTD), a synthetic analog of parathyroid hormone-related peptide (PTHrP)...
April 7, 2018: Osteoporosis International
https://www.readbyqxmd.com/read/29627878/discovery-of-a-small-molecule-inhibitor-of-dvl-cxxc5-interaction-by-computational-approaches
#18
Songling Ma, Jiwon Choi, Xuemei Jin, Hyun-Yi Kim, Ji-Hye Yun, Weontae Lee, Kang-Yell Choi, Kyoung Tai No
The Wnt/β-catenin signaling pathway plays a significant role in the control of osteoblastogenesis and bone formation. CXXC finger protein 5 (CXXC5) has been recently identified as a negative feedback regulator of osteoblast differentiation through a specific interaction with Dishevelled (Dvl) protein. It was reported that targeting the Dvl-CXXC5 interaction could be a novel anabolic therapeutic target for osteoporosis. In this study, complex structure of Dvl PDZ domain and CXXC5 peptide was simulated with molecular dynamics (MD)...
April 7, 2018: Journal of Computer-aided Molecular Design
https://www.readbyqxmd.com/read/29627383/lpaat%C3%AE-agpat4-deficiency-impairs-maximal-force-contractility-in-soleus-and-alters-fibre-type-in-extensor-digitorum-longus-muscle
#19
Ryan M Bradley, Darin Bloemberg, Juan J Aristizabal Henao, Ashkan Hashemi, Andrew S Mitchell, Val A Fajardo, Catherine Bellissimo, Emily B Mardian, Eric Bombardier, Marie-France Paré, Katherine A Moes, Ken D Stark, A Russell Tupling, Joe Quadrilatero, Robin E Duncan
Lysophosphatidic acid acyltransferase (LPAAT) δ/acylglycerophosphate acyltransferase 4 is a mitochondrial enzyme and one of five homologues that catalyze the acyl-CoA-dependent synthesis of phosphatidic acid (PA) from lysophosphatidic acid. We studied skeletal muscle LPAATδ and found highest levels in soleus, a red oxidative fibre-type that is rich in mitochondria, and lower levels in extensor digitorum longus (EDL) (white glycolytic) and gastrocnemius (mixed fibre-type). Using Lpaatδ-deficient mice, we found no change in soleus or EDL mass, or in treadmill time-to-exhaustion compared to wildtype littermates...
April 5, 2018: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/29626715/targeting-therapeutics-to-bone-by-conjugation-with-bisphosphonates
#20
REVIEW
Robert N Young, Marc D Grynpas
Bisphosphonates target and bind avidly to the mineral (hydroxyapatite) found in bone. This targeting ability has been exploited to design and prepare bisphosphonate conjugate prodrugs to deliver a wide variety of drug molecules selectively to bones. It is important that conjugates be stable in the blood stream and that conjugate that is not taken up by bone is eliminated rapidly. The prodrugs should release active drug at a rate appropriate so as to provide efficacy. Radiolabelling is the best method to quantify and evaluate pharmacokinetics, tissue distribution, bone uptake and release of the active drug(s)...
April 4, 2018: Current Opinion in Pharmacology
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