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https://www.readbyqxmd.com/read/28550762/forensic-age-estimation-by-morphometric-analysis-of-the-manubrium-from-3d-mr-images
#1
Naira P Martínez Vera, Johannes Höller, Thomas Widek, Bernhard Neumayer, Thomas Ehammer, Martin Urschler
Forensic age estimation research based on skeletal structures focuses on patterns of growth and development using different bones. In this work, our aim was to study growth-related evolution of the manubrium in living adolescents and young adults using magnetic resonance imaging (MRI), which is an image acquisition modality that does not involve ionizing radiation. In a first step, individual manubrium and subject features were correlated with age, which confirmed a statistically significant change of manubrium volume (Mvol:p<0...
May 12, 2017: Forensic Science International
https://www.readbyqxmd.com/read/28550626/combination-breast-cancer-chemotherapy-with-doxorubicin-and-cyclophosphamide-damages-bone-and-bone-marrow-in-a-female-rat-model
#2
Chiaming Fan, Kristen R Georgiou, Howard A Morris, Ross A McKinnon, Dorothy M K Keefe, Peter R Howe, Cory J Xian
PURPOSE: Anthracyclines (including doxorubicin) are still the backbone of commonly used breast cancer chemotherapy regimens. Despite increasing use of doxorubicin and cyclophosphamide (AC) combinations for treating breast cancer, their potential to cause adverse skeletal effects remains unclear. METHODS: This study examined the effects of treatments with the AC regimen on bone and bone marrow in adult female rats. RESULTS: AC treatment for four cycles (weekly intravenous injection of 2 mg/kg doxorubicin and 20 mg/kg cyclophosphamide) resulted in a reduced volume of trabecular bone at the metaphysis, which was associated with reduced serum levels of 25-hydroxy vitamin D3 and alkaline phosphatase...
May 26, 2017: Breast Cancer Research and Treatment
https://www.readbyqxmd.com/read/28550268/improving-reproducibility-of-phenotypic-assessments-in-the-dyw-mouse-model-of-laminin-%C3%AE-2-related-congenital-muscular-dystrophy
#3
Raffaella Willmann, Heather Gordish-Dressman, Sarina Meinen, Markus A Rüegg, Qing Yu, Kanneboyina Nagaraju, Ayar Kumar, Mahasweta Girgenrath, Caroline B M Coffey, Vivian Cruz, Pam M Van Ry, Laurent Bogdanik, Cathleen Lutz, Anne Rutkowski, Dean J Burkin
Laminin-α2 related Congenital Muscular Dystrophy (LAMA2-CMD) is a progressive muscle disease caused by partial or complete deficiency of laminin-211, a skeletal muscle extracellular matrix protein. In the last decade, basic science research has queried underlying disease mechanisms in existing LAMA2-CMD murine models and identified possible clinical targets and pharmacological interventions. Experimental rigor in preclinical studies is critical to efficiently and accurately quantify both negative and positive results, degree of efficiency of potential therapeutics and determine whether to move a compound forward for additional preclinical testing...
May 24, 2017: Journal of Neuromuscular Diseases
https://www.readbyqxmd.com/read/28550074/muscle-fiber-capillarization-as-determining-factor-on-indices-of-insulin-sensitivity-in-humans
#4
Tim Snijders, Joshua P Nederveen, Lex B Verdijk, Alfons J H M Houben, Gijs H Goossens, Gianna Parise, Luc J C van Loon
To investigate the association between muscle fiber capillarization and indices of insulin sensitivity in healthy older adults. A skeletal muscle biopsy was taken from the m vastus lateralis of 22 healthy (nondiabetic) male older adults. In addition, all participants underwent an Oral Glucose Tolerance Test (OGTT). Muscle fiber capillarization was assessed by immunohistochemistry. Participants were divided into a group with relatively low (LOW) or high (HIGH) muscle fiber capillarization (capillary-to-fiber perimeter exchange (CFPE) index), based on the median value for the entire group...
May 2017: Physiological Reports
https://www.readbyqxmd.com/read/28549989/overweight-in-elderly-people-induces-impaired-autophagy-in-skeletal-muscle
#5
Yaiza Potes, Beatriz de Luxán-Delgado, Susana Rodriguez-González, Marcela Rodrigues Moreira Guimarães, Juan J Solano, María Fernández-Fernández, Manuel Bermúdez, Jose A Boga, Ignacio Vega-Naredo, Ana Coto-Montes
Sarcopenia is the gradual loss of skeletal muscle mass, strength and quality associated with aging. Changes in body composition, especially in skeletal muscle and fat mass are crucial steps in the development of chronic diseases. We studied the effect of overweight on skeletal muscle tissue in elderly people without reaching obesity to prevent this extreme situation. Overweight induces a progressive protein breakdown reflected as a progressive withdrawal of anabolism against the promoted catabolic state leading to muscle wasting...
May 23, 2017: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/28549839/vitamin-b12-deficiency-might-be-related-to-sarcopenia-in-older-adults
#6
Esra Ates Bulut, Pinar Soysal, Ali Ekrem Aydin, Ozge Dokuzlar, Suleyman Emre Kocyigit, Ahmet Turan Isik
Sarcopenia and dynapenia are related to repeated falls, mobility restriction, depression, frailty, increased mortality and morbidity. The aim of this study is to evaluate the relationship between vitamin B12 deficiency and sarcopenia in older adults. 403 patients, who attended to outpatient clinic and underwent comprehensive geriatric assessment, were included study. All cases' skeletal muscle mass (SMM), walking speed and hand grip strength were recorded by bioimpedance, 4meter walking test and hand dynamometer respectively...
May 23, 2017: Experimental Gerontology
https://www.readbyqxmd.com/read/28549648/characterization-of-long-term-gait-deficits-in-mouse-dmcao-using-the-catwalk-system
#7
E Caballero-Garrido, J C Pena-Philippides, Z Galochkina, E Erhardt, T Roitbak
Evaluation of functional outcome is widely used across species to assess the recovery process following various pathological conditions, including spinal cord injury, musculo-skeletal injury, mithochondrial disease, neuropathic cancer, Huntington's disease, chronic pain, cortical lesion, and olivocerebellar degeneration among others. The Stroke Therapy Academic Industry Roundtable (STAIR) recommends multiple endpoints for behavioral studies in pre-clinical stroke research, to demonstrate their clinical relevance...
May 23, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28549599/accuracy-map-of-an-optical-motion-capture-system-with-42-or-21-cameras-in-a-large-measurement-volume
#8
Alexander M Aurand, Jonathan S Dufour, William S Marras
Optical motion capture is commonly used in biomechanics to measure human kinematics. However, no studies have yet examined the accuracy of optical motion capture in a large capture volume (>100m(3)), or how accuracy varies from the center to the extreme edges of the capture volume. This study measured the dynamic 3D errors of an optical motion capture system composed of 42 OptiTrack Prime 41 cameras (capture volume of 135m(3)) by comparing the motion of a single marker to the motion reported by a ThorLabs linear motion stage...
May 17, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28549558/the-kv1-3-channel-blocker-vm24-enhances-muscle-glucose-transporter-4-mobilization-but-does-not-reduce-body-weight-gain-in-diet-induced-obese-male-rats
#9
Lorraine Jaimes-Hoy, Georgina B Gurrola, Miguel Cisneros, Patricia Joseph-Bravo, Lourival D Possani, Jean-Louis Charli
AIMS: Voltage-gated potassium channels 1.3 (Kv1.3) can be targeted to reduce diet-induced obesity and insulin resistance in mice. Since species-specific differences in Kv1.3 expression and pharmacology have been observed, we tested the effect of Vm24, a high-affinity specific blocker of Kv1.3 channels from Vaejovis mexicanus smithi, on body weight (BW), glucose tolerance and insulin resistance in diet-induced obese rats. MATERIALS AND METHODS: Young adult male Wistar rats were switched to a high-fat/high-fructose (HFF) diet...
May 23, 2017: Life Sciences
https://www.readbyqxmd.com/read/28549466/radiographic-sarcopenia-predicts-postoperative-infectious-complications-in-patients-undergoing-pancreaticoduodenectomy
#10
Kosei Takagi, Ryuichi Yoshida, Takahito Yagi, Yuzo Umeda, Daisuke Nobuoka, Takashi Kuise, Toshiyoshi Fujiwara
BACKGROUND: Recently, skeletal muscle depletion (sarcopenia) has been reported to influence postoperative outcomes after certain procedures. This study investigated the impact of sarcopenia on postoperative outcomes following pancreaticoduodenectomy (PD). METHODS: We performed a retrospective study of consecutive patients (n = 219) who underwent PD at our institution between January 2007 and May 2013. Sarcopenia was evaluated using preoperative computed tomography...
May 26, 2017: BMC Surgery
https://www.readbyqxmd.com/read/28549098/high-protein-foods-and-physical-activity-protect-against-age-related-muscle-loss-and-functional-decline
#11
M Loring Bradlee, Jabed Mustafa, Martha R Singer, Lynn L Moore
Background: Some clinical trials suggest that protein supplementation enhances the effects of resistance exercise on skeletal muscle mass (SMM); fewer studies examine the effects of diets rich in protein-source foods on SMM and functional status among community-dwelling adults. Methods: Data from the Framingham Offspring study including diet (three-day records, exams 3 and 5), physical activity (exams 2 and 4), percent SMM (%SMM) (exams 6 and 7), and functional performance (exams 5 through 8) were used to evaluate independent and combined effects of physical activity and high-protein foods on adjusted mean %SMM (using analysis of covariance) and risk of functional decline (using Cox proportional hazard's models)...
May 25, 2017: Journals of Gerontology. Series A, Biological Sciences and Medical Sciences
https://www.readbyqxmd.com/read/28549072/predictors-of-25-hydroxyvitamin-d-measured-at-multiple-time-points-in-a-multiethnic-population
#12
Julia A Knight, Jody Wong, David E C Cole, Tim K Lee, Esteban J Parra
The evidence for a relationship of vitamin D with non-skeletal health outcomes is inconsistent. The validity of single or predicted measurements of 25-hydroxyvitamin D (25(OH)D) is unknown as this biomarker is highly seasonally variable. We compared models of 25(OH)D at baseline, at multiple time points throughout the year, and averaged over the year in 309 individuals in Toronto, Canada (43˚ N), 2009-2013. Information and blood samples were collected every two months. Baseline and average concentrations were correlated (r = 0...
May 26, 2017: American Journal of Epidemiology
https://www.readbyqxmd.com/read/28549046/associations-of-physical-fitness-and-body-composition-characteristics-with-simulated-military-task-performance
#13
K Pihlainen, M Santtila, K Häkkinen, H Kyröläinen
The purpose of the present study was to evaluate the associations of physical fitness and body composition characteristics with anaerobic endurance performance, tested in the combat load using the occupationally relevant military simulation test (MST). Eighty-one male soldiers, deployed to a crisis management operation in the Middle East, volunteered for the study and participated in a test battery consisting measurements of muscle strength, body composition characteristics, endurance capacity, and MST.A Spearman correlational analysis revealed that the strongest variable, correlated with MST time, was the countermovement jump performed with the combat load (CMJ2) (rs = -0...
May 25, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28549041/value-of-osteoblast-derived-exosomes-in-bone-diseases
#14
Min Ge, Yingzhi Wu, Ronghu Ke, Tianyi Cai, Junyi Yang, Xiongzheng Mu
PURPOSE: The authors' purpose is to reveal the value of osteoblast-derived exosomes in bone diseases. METHODS: Microvesicles from supernatants of mouse Mc3t3 were isolated by ultracentrifugation and then the authors presented the protein profile by proteomics analysis. RESULTS: The authors detected a total number of 1536 proteins by mass spectrometry and found 172 proteins overlap with bone database. The Ingenuity Pathway Analysis shows network of "Skeletal and Muscular System Development and Function, Developmental Disorder, Hereditary Disorder" and pathway about osteogenesis...
May 25, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28548960/severe-hypertriglyceridemia-due-to-two-novel-loss-of-function-lipoprotein-lipase-gene-mutations-c310r-e396v-in-a-chinese-family-associated-with-recurrent-acute-pancreatitis
#15
Yu Lun, Xiaofang Sun, Ping Wang, Jingwei Chi, Xu Hou, Yangang Wang
Lipoprotein lipase (LPL) is widely expressed in skeletal muscles, cardiac muscles as well as adipose tissue and involved in the catabolism of triglyceride. Herein we have systematically characterized two novel loss-of-function mutations in LPL from a Chinese family in which afflicted members were manifested by severe hypertriglyceridemia and recurrent pancreatitis. DNA sequencing revealed that the proband was a heterozygote carrying a novel c.T928C (p.C310R) mutation in exon 6 of the LPL gene. Another member of the family was detected to be a compound heterozygote who along with the c...
May 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/28548924/comparing-the-clinical-efficacy-of-abiraterone-acetate-enzalutamide-and-orteronel-in-patients-with-metastatic-castration-resistant-prostate-cancer-by-performing-a-network-meta-analysis-of-eight-randomized-controlled-trials
#16
Minyong Kang, Chang Wook Jeong, Cheol Kwak, Ja Hyeon Ku, Hyeon Hoe Kim
Various novel androgen receptor (AR) targeting drugs have been developed recently and have shown beneficial effects on survival in patients with metastatic castration-resistant prostate cancer (mCRPC). However, no consensus has been reached regarding which of these agents provides the most favorable oncological outcomes. Here, we aimed to compare the efficacy of novel AR-targeted agents by performing a network meta-analysis of randomized controlled trials (RCTs). We included eight RCTs for men with mCRPC treated with one of the AR targeting agents: abiraterone acetate, enzalutamide, or orteronel...
May 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/28547918/exercise-with-weight-loss-improves-adipose-tissue-and-skeletal-muscle-markers-of-fatty-acid-metabolism-in-postmenopausal-women
#17
Heidi K Ortmeyer, Andrew P Goldberg, Alice S Ryan
OBJECTIVE: The effects of 6-month weight loss (WL) versus aerobic exercise training (AEX)+WL on fat and skeletal muscle markers of fatty acid metabolism were determined in normal (NGT) and impaired (IGT) glucose tolerant African-American and Caucasian postmenopausal women with overweight/obesity. METHODS: Fat (gluteal and abdominal) lipoprotein lipase (LPL), skeletal muscle LPL, acyl-CoA synthase (ACS), ß-hydroxacyl-CoA dehydrogenase, carnitine palmitoyltransferase (CPT-1), and citrate synthase (CS) activities were measured at baseline (n = 104) and before and after WL (n = 34) and AEX+WL (n = 37)...
May 26, 2017: Obesity
https://www.readbyqxmd.com/read/28547916/non-shivering-thermogenesis-as-a-mechanism-to-facilitate-sustainable-weight-loss
#18
REVIEW
B F Palmer, D J Clegg
Currently, there is a significant percentage of the population who are or will be classified as obese, necessitating novel strategies to facilitate sustainable weight loss. Reductions in basal metabolic rate occur in the face of weight loss and pose formidable barriers to individuals attempting to sustain meaningful weight reductions. Here, we discuss the mechanisms by which non-shivering thermogenesis may provide insight into metabolic pathways that can become druggable targets to facilitate sustainable weight loss...
May 25, 2017: Obesity Reviews: An Official Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/28547886/the-suction-mechanism-of-the-pipid-frog-pipa-pipa-linnaeus-1758
#19
David Cundall, Edward Fernandez, Frances Irish
Most suction-feeding, aquatic vertebrates create suction by rapidly enlarging the oral cavity and pharynx. Forceful enlargement of the pharynx is powered by longitudinal muscles that retract skeletal elements of the hyoid, more caudal branchial arches, and, in many fish, the pectoral girdle. This arrangement was thought to characterize all suction-feeding vertebrates. However, it does not exist in the permanently aquatic, tongueless Pipa pipa, an Amazonian frog that can catch fish. Correlating high-speed (250 and 500 fps) video records with anatomical analysis and functional tests shows that fundamental features of tetrapod body design are altered to allow P...
May 25, 2017: Journal of Morphology
https://www.readbyqxmd.com/read/28547827/digital-dissection-of-the-model-organism-xenopus-laevis-using-contrast-enhanced-computed-tomography
#20
Laura B Porro, Christopher T Richards
The African clawed frog, Xenopus laevis, is one of the most widely used model organisms in biological research. However, the most recent anatomical description of X. laevis was produced nearly a century ago. Compared with other anurans, pipid frogs - including X. laevis - exhibit numerous unusual morphological features; thus, anatomical descriptions of more 'typical' frogs do not detail many aspects of X. laevis skeletal and soft-tissue morphology. The relatively new method of using iodine-based agents to stain soft tissues prior to high-resolution X-ray imaging has several advantages over gross dissection, such as enabling dissection of very small and fragile specimens, and preserving the three-dimensional topology of anatomical structures...
May 26, 2017: Journal of Anatomy
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