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https://www.readbyqxmd.com/read/28811684/lead-as-a-risk-factor-for-osteoporosis-in-post-menopausal-women
#1
REVIEW
Anjali Manocha, L M Srivastava, Seema Bhargava
Lead exposure is increasingly becoming an important risk factor for osteoporosis. In adults, approximately 80-90 % of absorbed lead is stored in the bones. These bone lead deposits are released into the blood during periods of enhanced bone resorption like menopause, forming a potential endogenous source of lead exposure. Postmenopausal women are at a higher risk for bone lead release because of hormonal and age related changes in bone metabolism. Estrogen deficiency is associated with increase in osteoclasts number and activity leading to both the early and late form of osteoporosis...
July 2017: Indian Journal of Clinical Biochemistry: IJCB
https://www.readbyqxmd.com/read/28811200/globular-adiponectin-reverses-osteo-sarcopenia-and-altered-body-composition-in-ovariectomized-rats
#2
Shyamsundar Pal China, Subhashis Pal, Sourav Chattopadhyay, Konica Porwal, Sapana Kushwaha, Sharmishtha Bhattacharyya, Monika Mittal, Anagha A Gurjar, Tarun Barbhuyan, Abhishek K Singh, Arun K Trivedi, Jiaur R Gayen, Sabyasachi Sanyal, Naibedya Chattopadhyay
Adiponectin regulates various metabolic processes including glucose flux, lipid breakdown and insulin response. We recently reported that adiponectin receptor1 (adipoR1) activation by a small molecule reverses osteopenia in leptin receptor deficient db/db (diabetic) mice. However, the role of adiponectin in bone metabolism under the setting of post-menopausal (estrogen-deficiency) osteopenia and associated metabolic derangements has not been studied. Here, we studied the therapeutic effect of the globular form of adiponectin (gAd), which is predominantly an adipoR1 agonist, in aged ovariectomized (OVX) rats and compared it with standard-of-care anti-osteoporosis drugs...
August 12, 2017: Bone
https://www.readbyqxmd.com/read/28810860/tartrate-resistant-acid-phosphate-as-biomarker-of-bone-turnover-over-the-lifespan-and-different-physiologic-stages-in-sheep
#3
José A Camassa, Camila C Diogo, João P A Bordelo, Marília de A Bonelli, Carlos A Viegas, Jorge T Azevedo, Nuno Dourado, Isabel R Dias
BACKGROUND: Currently, the best resources for assessment of bone tissue using imaging techniques are expensive and available in few medical facilities, thus serum or urinary bone turnover biomarkers could be useful as early indicators of prognosis. However, there is a wide range of variability in bone turnover markers due to several factors, such as different ages and metabolic stages, thus it is important to have as much data published on the subject as possible. The aim of this study was therefore to generate a reference range for alkaline phosphatase (ALP) and tartrate-resistant acid phosphatase (TRAP) and validate the already published data...
August 15, 2017: BMC Veterinary Research
https://www.readbyqxmd.com/read/28810629/inhibition-of-microrna-34a-ameliorates-murine-collagen-induced-arthritis
#4
Qiujie Dang, Fan Yang, Hongwei Lei, Xin Liu, Minglu Yan, He Huang, Xuemei Fan, Yang Li
Rheumatoid arthritis (RA) is one of the most frequently occurring autoimmne diseases, with symptoms including synovium hyperplasia, immune disorder, cartilage damage and bone resorption. It has previously been demonstrated that microRNA-34a (miR-34a) may participate in cell apoptosis, immune activation and bone metabolism, therefore the present study investigated the effects of miR-34a on RA. Collagen-induced arthritic (CIA) mice were employed as a murine model of experimental arthritis, and it was demonstrated that the level of miR-34a in the spleens, lymph nodes and synovium was increased in the CIA mice compared with normal DBA/1j mice...
August 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28809938/perinatal-testosterone-exposure-potentiates-vascular-dysfunction-by-er%C3%AE-suppression-in-endothelial-progenitor-cells
#5
Weiguo Xie, Mingming Ren, Ling Li, Yin Zhu, Zhigang Chu, Zhigang Zhu, Qiongfang Ruan, Wenting Lou, Haimou Zhang, Zhen Han, Xiaodong Huang, Wei Xiang, Tao Wang, Paul Yao
Recent clinical cohort study shows that testosterone therapy increases cardiovascular diseases in men with low testosterone levels, excessive circulating androgen levels may play a detrimental role in the vascular system, while the potential mechanism and effect of testosterone exposure on the vascular function in offspring is still unknown. Our preliminary results showed that perinatal testosterone exposure in mice induces estrogen receptor β (ERβ) suppression in endothelial progenitor cells (EPCs) in offspring but not mothers, while estradiol (E2) had no effect...
2017: PloS One
https://www.readbyqxmd.com/read/28809621/cardiovascular-risk-factors-and-mortality-in-children-with-chronic-kidney-disease
#6
Abdullahi Mudi, Caroline Dickens, Cecil Levy, Daynia Ballot
BACKGROUND: Cardiovascular disease (CVD) begins early in children with chronic kidney disease (CKD), and its progression is determined by the presence of single or multiple cardiovascular risk factors (CVRFs). OBJECTIVE: To determine the prevalence of CVRFs in children with CKD and their association with mortality in children on chronic dialysis. METHODS: This comparative cross-sectional study recruited children aged 5 - 18 years with all stages of CKD...
July 28, 2017: South African Medical Journal, Suid-Afrikaanse Tydskrif Vir Geneeskunde
https://www.readbyqxmd.com/read/28808890/vitamin-d-activity-and-metabolism-in-bone
#7
REVIEW
Paul H Anderson
PURPOSE OF REVIEW: In addition to the actions of the endocrine hormone, 1alpha,25-dihydroxyvitamin D (1,25(OH)2D) in stimulating intestinal calcium absorption, the regulation of bone mineral metabolism by 1,25(OH)2D is also considered an important contributor to calcium homeostasis. However, recent evidence suggest that 1,25(OH)2D acting either via endocrine or autocrine pathways plays varied roles in bone, which suggests that vitamin D contributes to the maintenance of bone mineral in addition to its catabolic roles...
August 14, 2017: Current Osteoporosis Reports
https://www.readbyqxmd.com/read/28808057/a-kidney-specific-genetic-control-module-in-mice-governs-endocrine-regulation-of-the-cytochrome-p450-gene-cyp27b1-essential-for-vitamin-d3-activation
#8
Mark B Meyer, Nancy A Benkusky, Martin Kaufmann, Seong Min Lee, Melda Onal, Glenville Jones, J Wesley Pike
The vitamin D endocrine system regulates mineral homeostasis through its activities in the intestine, kidney, and bone. Terminal activation of vitamin D3 to its hormonal form, 1,25(OH)2D3, occurs in the kidney via the cytochrome P450 enzyme CYP27B1. Despite its importance in vitamin D metabolism, the molecular mechanisms underlying the regulation of the gene for this enzyme, Cyp27b1, are unknown. Here, we identified a kidney-specific control module governed by a renal cell-specific chromatin structure located distal to Cyp27b1 that mediates unique basal and parathyroid hormone (PTH)-, fibroblast growth factor 23 (FGF23)-, and 1,25(OH)2D3-mediated regulation of Cyp27b1 expression...
August 14, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28807877/cryptotanshinone-promotes-commitment-to-the-brown-adipocyte-lineage-and-mitochondrial-biogenesis-in-c3h10t1-2-mesenchymal-stem-cells-via-ampk-and-p38-mapk-signaling
#9
Khan Mohammad Imran, Naimur Rahman, Dahyeon Yoon, Miso Jeon, Byong-Taek Lee, Yong-Sik Kim
Although white adipose tissue (WAT) stores triglycerides and contributes to obesity, brown adipose tissue (BAT) dissipates energy as heat. Therefore, browning of WAT is regarded as an attractive way to counteract obesity. Our previous studies have revealed that treatment with cryptotanshinone (CT) during adipogenesis of 3T3-L1 cells inhibits their differentiation. Here, we found that pretreatment of C3H10T1/2 mesenchymal stem cells with CT before exposure to adipogenic hormonal stimuli promotes the commitment of these mesenchymal stem cells to the adipocyte lineage as confirmed by increased triglyceride accumulation...
August 11, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28807473/water-treatment-by-magnetic-field-increases-bone-mineral-density-of-rats
#10
Geraldo Balieiro Neto, Jair Rodini Engracia Filho, Bruna Rezende Silva Martins de Oliveira, Cássia Maria Molinaro Coelho, Lilian Francisco Arantes de Souza, Mario Jefferson Quirino Louzada
Water treatment using a magnetic field is an attractive but controversial issue with regard to its effects on human health. This study aimed to investigate the effects of water treatment using a magnetic field on the bone mineral density (BMD), bone mineral content (BMC), bone area (BA), bone resistance (BR), blood gas analysis, blood viscosity, and blood biochemical profile of rats. Forty-eight Wistar rats were divided into 2 groups: control (n = 24) and magnetic water-treated (n = 24). Each of these groups was subdivided into 3 groups to evaluate 3 consumption periods (15, 30, and 45 d)...
August 11, 2017: Journal of Clinical Densitometry
https://www.readbyqxmd.com/read/28806419/effects-of-short-term-dry-immersion-on-bone-remodeling-markers-insulin-and-adipokines
#11
Marie-Thérèse Linossier, Liubov E Amirova, Mireille Thomas, Myriam Normand, Marie-Pierre Bareille, Guillemette Gauquelin-Koch, Arnaud Beck, Marie-Claude Costes-Salon, Christine Bonneau, Claude Gharib, Marc-Antoine Custaud, Laurence Vico
BACKGROUND: Dry immersion (DI), a ground-based model of microgravity previously used in Russia, has been recently implemented in France. The aim of this study was to analyze early events in a short-term DI model in which all conditions are met to investigate who is first challenged from osteo- or adipo-kines and to what extent they are associated to insulin-regulating hormones. METHODS: Twelve healthy men were submitted to a 3-day DI. Fasting blood was collected during pre-immersion phase for the determination of the baseline data collection (BDC), daily during DI (DI24h, DI48H and DI72h), then after recovery (R+3h and R+24h)...
2017: PloS One
https://www.readbyqxmd.com/read/28806275/effects-of-creatine-and-carbohydrate-loading-on-cycling-time-trial-performance
#12
Kristyen A Tomcik, Donny M Camera, Julia L Bone, Megan L Ross, Nikki A Jeacocke, Bill Tachtsis, Joan Senden, Luc J C van Loon, John A Hawley, Louise M Burke
INTRODUCTION: Creatine- and carbohydrate-loading are dietary strategies used to enhance exercise capacity. This study examined the metabolic and performance effects of a combined creatine and CHO-loading regiment on time-trial (TT) cycling bouts. METHODS: Eighteen well-trained (~65mL[BULLET OPERATOR]kg[BULLET OPERATOR]min VO2peak) males completed three performance trials (PT) comprised of a 120-km cycling TT interspersed with alternating 1- and 4-km sprints (6 sprints each) performed every 10-km followed by an inclined ride to fatigue (~90% VO2peak)...
August 11, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28806248/bone-spect-ct-localizes-increased-bone-metabolism-and-subsequent-bone-resorption-in-reflex-sympathetic-dystrophy
#13
Hidetoshi Narimatsu, Tadaki Nakahara, Sayuri Kodama, Hiromi Hisazumi, Shinichi Tominaga, Kiyoshi Ohkuma, Masahiro Jinzaki
A 64-year-old man with lung cancer with a history of revascularization of the occluded right femoral artery underwent bone scintigraphy, which showed intense uptake in the distal side of the right leg. The additional SPECT/CT clarified that the uptake was predominantly increased in the epiphyses of the right ankle and foot with possible osteopenia. One month later, follow-up SPECT/CT showed the manifestation of periosteal resorption in the hypermetabolic sites with slight decrease in bone metabolism. Radiological correlation between bone metabolism and subsequent bone resorption in addition to clinical symptoms in this patient suggested the diagnosis of reflex sympathetic dystrophy...
August 12, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28805705/changes-of-bone-related-minerals-during-denosumab-administration-in-post-menopausal-osteoporotic-patients
#14
Takako Suzuki, Yukio Nakamura, Hiroyuki Kato
OBJECTIVES: This retrospective study included 21 patients with primary osteoporosis who were treated with the anti-resorption drug, denosumab. To date, there has been no detailed report on the changes of bone-related minerals after anti-resorption drug therapy. METHODS: Twenty-one post-menopausal females were retrospectively enrolled. Serum zinc (Zn), magnesium (Mg), iron (Fe), copper (Cu), grip strength, and estimated glomerular filtration rate (eGFR) were examined at one week and 1, 2, 4, 6, 8, 10, and 12 months...
August 13, 2017: Nutrients
https://www.readbyqxmd.com/read/28805201/-osteoporosis-and-vascular-calcification-in-rheumatoid-arthritis-the-role-of-osteoprotegerin-and-sclerostin
#15
REVIEW
Magdalena Krajewska-Włodarczyk, Tomasz Stompór
Disorders of bone tissue metabolism and increased frequency of cardiovascular diseases are among the well-known, extra-articular complications of rheumatoid arthritis (ra). The mechanisms leading to local and generalized loss of bone tissue as well as those promoting calcification of vessels are similar. Recently, a great interest has aroused among the studies related to the meaning of the RANKL/RANK/OPG system and the Wnt/β-catenin signaling pathway, as biological links between the bone and vascular systems...
July 21, 2017: Polski Merkuriusz Lekarski: Organ Polskiego Towarzystwa Lekarskiego
https://www.readbyqxmd.com/read/28804813/a-systematic-review-of-the-clinical-applications-and-complications-of-bone-marrow-aspirate-concentrate-in-management-of-bone-defects-and-nonunions
#16
REVIEW
Mohamed A Imam, James Holton, Lukas Ernstbrunner, Wojciech Pepke, Florian Grubhofer, Ali Narvani, Martyn Snow
PURPOSE: Fracture healing encompasses a succession of dynamic multifactorial metabolic events, which ultimately re-establishes the integrity of the biomechanical properties of the bone. Up to 10% of the fractures occurring annually will need additional surgical procedures because of impaired healing. The aim of this article is to review the current literature regarding the use of bone marrow aspirate concentrate (BMAC) and its effectiveness in the management of bone defects. METHODS: We have included all published clinical literature investigating the development, techniques and applications of BMAC...
August 13, 2017: International Orthopaedics
https://www.readbyqxmd.com/read/28804610/naringin-enhances-osteogenic-differentiation-through-the-activation-of-erk-signaling-in-human-bone-marrow-mesenchymal-stem-cells
#17
Huichao Wang, Chunbo Li, Jianming Li, Yingjie Zhu, Yudong Jia, Ying Zhang, Xiaodong Zhang, Wenlong Li, Lei Cui, Wuyin Li, Youwen Liu
OBJECTIVES: Naringin has been reported to regulate bone metabolism. However, its effect on osteogenesis remains unclear. The aim was to investigate the effect of naringin on osteogenic differentiation of human bone marrow mesenchymal stem cells (hBMSCs) through the activation of the ERK signaling pathway in osteogenic differentiation. MATERIALS AND METHODS: Annexin V-FITC assay and MTT assay were used to measure the effect of naringin on cytotoxicity and proliferation of hBMSCs, respectively...
April 2017: Iranian Journal of Basic Medical Sciences
https://www.readbyqxmd.com/read/28804568/preventive-effects-of-kudzu-root-on-bone-loss-and-cartilage-degradation-in-ovariectomized-rat
#18
Yunyun Luo, Shuang Zheng, Yujia Ding, Yueqin Dai, Yi Zhou, Ruifeng Xiang, Anne C Bay-Jensen, Morten A Karsdal, Per Qvist, Qinlong Zheng
The clinical utility of Traditional Chinese Medicine (TCM) herbs/roots extracts in osteoporosis (OP) and osteoarthritis (OA) has been described in multiple reports, but there have been few studies of TCM for preventing bone loss and cartilage degradation simultaneously. Six-month-old female Sprague-Dawley rats each were subjected to ovariectomized (OVX) or sham surgery and treated orally once daily with herbal extracts or vehicle. Body weight was recorded weekly, and blood samples were collected from fasting animals at different time points...
2017: American Journal of Translational Research
https://www.readbyqxmd.com/read/28803808/two-novel-mutations-p-ser160pro-and-p-arg472cys-causing-glucose-6-phosphate-isomerase-deficiency-are-associated-with-erythroid-dysplasia-and-inappropriately-suppressed-hepcidin
#19
Renata Mojzikova, Pavla Koralkova, Dusan Holub, Zuzana Saxova, Dagmar Pospisilova, Daniela Prochazkova, Petr Dzubak, Monika Horvathova, Vladimir Divoky
Glucose-6-phosphate isomerase (GPI) deficiency, a genetic disorder responsible for chronic nonspherocytic hemolytic anemia, is the second most common red blood cell glycolytic enzymopathy. We report three patients from two unrelated families of Czech and Slovak origin with macrocytic hemolytic anemia due to GPI deficiency. The first patient had 15% of residual GPI activity resulting from two new heterozygous missense mutations c.478T>C and c.1414C>T leading to substitutions p.(Ser160Pro) and p.(Arg472Cys)...
April 14, 2017: Blood Cells, Molecules & Diseases
https://www.readbyqxmd.com/read/28803771/perioperative-management-of-patients-with-end-stage-renal-disease
#20
REVIEW
Hirotsugu Kanda, Yuji Hirasaki, Takafumi Iida, Megumi Kanao-Kanda, Yuki Toyama, Takashi Chiba, Takayuki Kunisawa
End-stage renal disease (ESRD) is associated with significant alterations in cardiovascular function; homeostasis of body fluid, electrolytes, and acid-base equilibrium; bone metabolism, erythropoiesis; and blood coagulation. The prevalence of ESRD is increasing rapidly worldwide, as is the number of patients requiring surgery under general anesthesia. Patients with ESRD have significantly higher risks of perioperative morbidity and mortality due to multiple comorbidities. The perioperative management of patients with ESRD under general anesthesia therefore requires special considerations and a careful multidisciplinary approach...
April 13, 2017: Journal of Cardiothoracic and Vascular Anesthesia
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