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https://www.readbyqxmd.com/read/29453925/impact-of-opioid-therapy-on-gonadal-hormones-focus-on-buprenorphine
#1
REVIEW
Anjali Varma, Mamta Sapra, Ali Iranmanesh
Objective The USA is in the midst of an opioid crisis. Understanding the impact of opioids and commonly used treatments for opioid dependence is essential for clinicians and researchers in order to educate and treat the nation's growing population with opioid use disorders. As a relatively new treatment for opioid dependence, buprenorphine is gaining popularity to the extent of becoming not only a preferred approach to the maintenance of opiate addiction, but also an option for chronic pain management. The purpose of this report is to review the available evidence on the endocrine effects of buprenorphine, particularly as it relates to the hypothalamic-pituitary-gonadal (HPG) axis, which is controversial and not fully defined...
February 17, 2018: Hormone Molecular Biology and Clinical Investigation
https://www.readbyqxmd.com/read/29453616/laser-induced-plasma-spectroscopy-lips-use-of-a-geological-tool-in-assessing-bone-mineral-content
#2
László Andrássy, Izabella Gomez, Ágnes Horváth, Katalin Gulyás, Zsófia Pethö, Balázs Juhász, Harjit Pal Bhattoa, Zoltan Szekanecz
Bone may be similar to geological formulations in many ways. Therefore, it may be logical to apply laser-based geological techniques in bone research. The mineral and element oxide composition of bioapatite can be estimated by mathematical models. Laser-induced plasma spectrometry (LIPS) has long been used in geology. This method may provide a possibility to determine the composition and concentration of element oxides forming the inorganic part of bones. In this study, we wished to standardize the LIPS technique and use mathematical calculations and models in order to determine CaO distribution and bone homogeneity using bovine shin bone samples...
February 17, 2018: Lasers in Medical Science
https://www.readbyqxmd.com/read/29453226/modeling-the-human-bone-marrow-niche-in-mice-from-host-bone-marrow-engraftment-to-bioengineering-approaches
#3
REVIEW
Ander Abarrategi, Syed A Mian, Diana Passaro, Kevin Rouault-Pierre, William Grey, Dominique Bonnet
Xenotransplantation of patient-derived samples in mouse models has been instrumental in depicting the role of hematopoietic stem and progenitor cells in the establishment as well as progression of hematological malignancies. The foundations for this field of research have been based on the development of immunodeficient mouse models, which provide normal and malignant human hematopoietic cells with a supportive microenvironment. Immunosuppressed and genetically modified mice expressing human growth factors were key milestones in patient-derived xenograft (PDX) models, highlighting the importance of developing humanized microenvironments...
February 16, 2018: Journal of Experimental Medicine
https://www.readbyqxmd.com/read/29452987/cell-therapy-for-peripheral-artery-disease
#4
REVIEW
Nikolaos G Frangogiannis
Patients with severe peripheral artery disease (PAD) who are not candidates for revascularization have poor prognosis. Cell therapy using peripheral blood-derived or bone marrow-derived mononuclear cells, mesenchymal stem cells, or marker-specific subsets of bone marrow cells with angiogenic properties may hold promise for no-option PAD patients. Injected cells may exert beneficial actions by enhancing local angiogenesis (either through maturation of endothelial progenitors, or through secretion of angiogenic mediators), or by transducing cytoprotective signals that preserve tissue structure...
February 13, 2018: Current Opinion in Pharmacology
https://www.readbyqxmd.com/read/29452785/the-risks-of-sarcopenia-falls-and-fractures-in-patients-with-type-2-diabetes-mellitus
#5
REVIEW
C Sarodnik, S P G Bours, N C Schaper, J P van den Bergh, T A C M van Geel
Fracture risk in patients with type 2 diabetes mellitus (T2DM) is increased, and the mechanism is multifactorial. Recent research on T2DM-induced bone fragility shows that bone mineral density (BMD) is often normal or even slightly elevated. However, bone turnover may be decreased and bone material and microstructural properties are altered, especially when microvascular complications are present. Besides bone fragility, extra-skeletal factors leading to an increased propensity to experience falls may also contribute to the increased fracture risk in T2DM, such as peripheral neuropathy, retinopathy and diabetes medication (e...
March 2018: Maturitas
https://www.readbyqxmd.com/read/29451497/automated-skeletal-tissue-quantification-in-the-lower-leg-using-pqct
#6
Sokratis Makrogiannis, Fatima Boukari, Luigi Ferrucci
In this paper we introduce a methodology for hard and soft tissue quantification at proximal, intermediate and distal tibia sites using peripheral Quantitative Computed Tomography (pQCT) scans. Quantification of bone properties is crucial for estimating bone structure resistance to mechanical stress and adaptations to loading. Soft tissue variables can be computed to investigate muscle volume and density, muscle-bone relationship, and fat infiltration.
 Approach: We employed implicit active contour models and clustering techniques for automated segmentation and identification of bone, muscle and fat at 4%, 38%, and 66% tibia length...
February 15, 2018: Physiological Measurement
https://www.readbyqxmd.com/read/29450763/effects-of-915-nm-laser-irradiation-on-human-osteoblasts-a-preliminary-in-vitro-study
#7
Giovanni Mergoni, Paolo Vescovi, Silvana Belletti, Jacopo Uggeri, Samir Nammour, Rita Gatti
Photobiomodulation (PBM) is a non-invasive treatment that uses laser or led devices making its effects a response to light and not to heat. The possibility of accelerating dental implant osteointegration and orthodontic movements and the need to treat refractory bone lesions, such as bisphosphonate related osteonecrosis of the jaws, has led researchers to consider the effects of PBM on bone for dentistry purposes. The aim of our study was to investigate the effects of 915 nm light supplied with a GaAs diode laser on human osteoblasts in vitro...
February 15, 2018: Lasers in Medical Science
https://www.readbyqxmd.com/read/29450584/dietary-patterns-and-longitudinal-change-in-hip-bone-mineral-density-among-older-men
#8
T S Rogers, S Harrison, S Judd, E S Orwoll, L M Marshall, J Shannon, L Langsetmo, N E Lane, J M Shikany
Studying dietary patterns is often more informative than individual nutrients or foods. We found that a Prudent dietary pattern (rich in vegetables and fish) was associated with reduced loss of total hip BMD in older men. A Prudent dietary pattern may be a potential lifestyle strategy for minimizing bone loss. INTRODUCTION: This study aimed to identify baseline dietary patterns using factor analysis in a cohort of older men and to evaluate whether the dietary patterns were associated with bone mineral density change (%ΔBMD) at the total hip and femoral neck over time...
February 15, 2018: Osteoporosis International
https://www.readbyqxmd.com/read/29450452/effect-of-neoadjuvant-chemotherapy-plus-regional-hyperthermia-on-long-term-outcomes-among-patients-with-localized-high-risk-soft-tissue-sarcoma-the-eortc-62961-esho-95-randomized-clinical-trial
#9
Rolf D Issels, Lars H Lindner, Jaap Verweij, Rüdiger Wessalowski, Peter Reichardt, Peter Wust, Pirus Ghadjar, Peter Hohenberger, Martin Angele, Christoph Salat, Zeljko Vujaskovic, Soeren Daugaard, Olav Mella, Ulrich Mansmann, Hans Roland Dürr, Thomas Knösel, Sultan Abdel-Rahman, Michael Schmidt, Wolfgang Hiddemann, Karl-Walter Jauch, Claus Belka, Alessandro Gronchi
Importance: Patients with soft tissue sarcoma are at risk for local recurrence and distant metastases despite optimal local treatment. Preoperative anthracycline plus ifosfamide chemotherapy improves outcome in common histological subtypes. Objective: To analyze whether the previously reported improvement in local progression-free survival by adding regional hyperthermia to neoadjuvant chemotherapy translates into improved survival. Design, Setting, and Participants: Open-label, phase 3 randomized clinical trial to evaluate the efficacy and toxic effects of neoadjuvant chemotherapy plus regional hyperthermia...
February 15, 2018: JAMA Oncology
https://www.readbyqxmd.com/read/29448837/restoring-tracheal-defects-in-a-rabbit-model-with-tissue-engineered-patches-based-on-tgf-%C3%AE-3-encapsulating-electrospun-poly-l-lactic-acid-co-%C3%AE%C2%B5-caprolactone-collagen-scaffolds
#10
Hui Jing, Botao Gao, Manchen Gao, Haiyue Yin, Xiumei Mo, Xiaoyang Zhang, Kai Luo, Bei Feng, Wei Fu, Jing Wang, Wei Zhang, Meng Yin, Zhongqun Zhu, Xiaomin He, Jinghao Zheng
Long segment tracheal stenosis often has a poor prognosis due to the limited availability of materials for tracheal reconstruction. Tissue engineered tracheal patches based on electrospun scaffolds and stem cells present ideal solutions to this medical challenge. However, the established engineering process is inefficient and time-consuming. In our research, to optimize the engineering process, core-shell nanofilms encapsulating TGF-β3 were fabricated as scaffolds for tracheal patches. The morphological and mechanical characteristics, degradation and biocompatibility of poly(l-lactic acid-co-ε-caprolactone)/collagen (PLCL/collagen) scaffolds with different compositions (PLCL:collagen 75:25, 50:50 and 25:75, respectively) were comparatively evaluated to determine the preferable compositional ratio...
February 15, 2018: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/29448032/risedronate-reduces-postoperative-bone-resorption-after-cementless-total-hip-arthroplasty-a-systematic-review-and-meta-analysis
#11
Meng Wang, Liang Wang, Ruqing Ye
OBJECTIVE: To examine the effects of risedronate for reducing periprosthetic bone loss after total hip arthroplasty (THA). METHODS: Two reviewers performed an electronic literature search for randomized controlled trial (RCTs) evaluating the risedronate in the management of periprosthetic bone loss after primary THA. The electronic databases include PubMed, Medline, Embase, Web of Science and the Cochrane Library from inception to January 2018. We assessed the risk of bias using the Cochrane risk-of-bias tool...
February 12, 2018: International Journal of Surgery
https://www.readbyqxmd.com/read/29447937/splenectomy-may-have-more-complications-than-currently-proven
#12
Somayeh Zakeri, Narjes Gorji, Marjan Akhtari, Reihaneh Moeini
The spleen has been one of the least understood major organs for centuries. Its significance is relatively well-known today but it seems that all aspects of its activities are not fully understood. Persian medicine (PM) has special views on the function of spleen; many side effects were reported in PM due to spleen dysfunction. On the other hand nowadays splenectomy as a treatment strategy is recommended for some disorders and increasing risk of infections is considered as the most important long term side effect of that...
March 2018: Medical Hypotheses
https://www.readbyqxmd.com/read/29447362/eq-5d-y-for-the-assessment-of-health-related-quality-of-life-among-taiwanese-youth-with-mild-to-moderate-chronic-kidney-disease
#13
Chien-Ning Hsu, Hsiang-Wen Lin, A Simon Pickard, You-Lin Tain
Objective: To assess if health-related quality of life (HRQOL) of children with chronic kidney disease (CKD) and different comorbid conditions can be identified based on the EQ-5D child-friendly version (EQ-5D-Y). Design: Prospective cross-sectional study. Setting: A tertiary care medical center in Taiwan. Study participants: All CKD patients aged 7-18 years treated at the center between May 2014 and December 2016. Main Outcome Measures: HRQOL assessment was done using EQ-5D-Y...
February 13, 2018: International Journal for Quality in Health Care
https://www.readbyqxmd.com/read/29447021/release-of-pro-inflammatory-cytokines-from-muscle-and-bone-causes-tenocyte-death-in-a-novel-rotator-cuff-in-vitro-explant-culture-model
#14
Brianne K Connizzo, Alan J Grodzinsky
Tendinopathy is a significant clinical problem thought to be associated with altered mechanical loading. Explant culture models allow researchers to alter mechanical loading in a controlled in vitro environment while maintaining tenocytes in their native matrix. However, current models do not accurately represent commonly injured tendons, ignoring contributions of associated musculature and bone, as well as regional collagen structure. This study details the characterization of a mouse rotator cuff explant culture model, including bone, tendon, and muscle (BTM)...
February 15, 2018: Connective Tissue Research
https://www.readbyqxmd.com/read/29447019/lysophosphatidic-acid-enhanced-the-osteogenic-and-angiogenic-capability-of-osteoblasts-via-lpa1-3-receptor
#15
Chen Xiaodan, Song Zijun, Chen Rui, Tan Shuyi, Huang Chunhuang, Liu Yanhui, Cheng Bin, Fu Qiang
Lysophosphatidic acid is a serum-derived growth factor that is involved in wound healing. Although in its infancy, a growing body of evidence has demonstrated that lysophosphatidic acid exerts a potentially significant role in regulating bone cell biology. However, previous studies mainly focused on the osteoinductive potential of lysophosphatidic acid, its effects on bone tissue vascularization, another essential element during bone regeneration, remains ill-defined so far. Here in this study, we examined the effects of lysophosphatidic acid on osteogenic differentiation as well as the angiogenesis-inducing capacity of pre-osteoblasts, a cell population that coordinates osteogenic and angiogenic processes in bone regenerating niche...
February 15, 2018: Connective Tissue Research
https://www.readbyqxmd.com/read/29446455/uncultivated-stromal-vascular-fraction-is-equivalent-to-adipose-derived-stem-and-stromal-cells-on-porous-polyurethrane-scaffolds-forming-adipose-tissue-in-vivo
#16
Michael Griessl, Anna-Maria Buchberger, Sybille Regn, Kilian Kreutzer, Katharina Storck
OBJECTIVES/HYPOTHESIS: To find an alternative approach to contemporary techniques in tissue augmentation and reconstruction, tissue engineering strategies aim to involve adipose-derived stem and stromal cells (ASCs) harboring a strong differentiation potential into various tissue types such as bone, cartilage, and fat. STUDY DESIGN: Animal research. METHODS: The stromal vascular fraction (SVF) was used directly as a cell source to provide a potential alternative to contemporary ASC-based adipose tissue engineering...
February 15, 2018: Laryngoscope
https://www.readbyqxmd.com/read/29446086/subchondral-bone-morphology-in-the-metacarpus-of-racehorses-in-training-changes-with-distance-from-the-articular-surface-but-not-with-age
#17
Sandra Martig, Peta L Hitchens, Mark A Stevenson, R Chris Whitton
The repetitive large loads generated during high-speed training and racing commonly cause subchondral bone injuries in the metacarpal condyles of racehorses. Adaptive bone modelling leads to focal sclerosis at the site of highest loading in the palmar aspect of the metacarpal condyles. Information on whether and how adaptive modelling of subchondral bone changes during the career of a racehorse is sparse. The aim of this cross-sectional study was to describe the changes in subchondral bone micromorphology in the area of highest loading in the palmar aspect of the metacarpal condyle in thoroughbred racehorses as a function of age and training...
February 15, 2018: Journal of Anatomy
https://www.readbyqxmd.com/read/29446074/a-hitchhiker-s-guide-to-humanized-mice-new-pathways-to-studying-viral-infections
#18
REVIEW
J K Skelton, A M Ortega-Prieto, M Dorner
Humanized mice are increasingly appreciated as an incredibly powerful platform for infectious disease research. The often very narrow species tropism of many viral infections, coupled with the sometimes-misleading results from preclinical studies in animal models (e.g. fatal immune reactions in the PEARL study 1 ) further emphasize the need for more predictive model systems based on human cells rather than surrogates. Humanized mice represent such a model and have been greatly enhanced in regards to their immune system reconstitution as well as immune functionality in the past years, resulting in their recommendation as pre-clinical model by the US Food and Drug Administration...
February 15, 2018: Immunology
https://www.readbyqxmd.com/read/29445947/bone-graft-materials-for-posterolateral-fusion-made-simple-a-systematic-review
#19
REVIEW
Matthew T Morris, Sandip P Tarpada, Woojin Cho
BACKGROUND: Iliac crest has long been the gold standard for lumbar fusion, but concerns over donor site morbidity have led to a wide variety of bone graft substitutes. Despite prolific research, a general consensus is yet to be reached on bone graft materials that lead to optimal fusion. PURPOSE: The purpose of this review is to evaluate the current literature for bone graft material options that maximize fusion rate in posterolateral lumbar fusion surgery. DESIGN: Systematic Review...
February 14, 2018: European Spine Journal
https://www.readbyqxmd.com/read/29444703/whole-bone-testing-in-small-animals-systematic-characterization-of-the-mechanical-properties-of-different-rodent-bones-available-for-rat-fracture-models
#20
Peter M Prodinger, Peter Foehr, Dominik Bürklein, Oliver Bissinger, Hakan Pilge, Kilian Kreutzer, Rüdiger von Eisenhart-Rothe, Thomas Tischer
OBJECTIVES: Rat fracture models are extensively used to characterize normal and pathological bone healing. Despite, systematic research on inter- and intra-individual differences of common rat bones examined is surprisingly not available. Thus, we studied the biomechanical behaviour and radiological characteristics of the humerus, the tibia and the femur of the male Wistar rat-all of which are potentially available in the experimental situation-to identify useful or detrimental biomechanical properties of each bone and to facilitate sample size calculations...
February 14, 2018: European Journal of Medical Research
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