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https://www.readbyqxmd.com/read/28914969/autocrine-and-paracrine-regulation-of-the-murine-skeleton-by-osteocyte-derived-parathyroid-hormone-related-protein
#1
Niloufar Ansari, Patricia W M Ho, Blessing Crimeen-Irwin, Ingrid J Poulton, Athena R Brunt, Mark R Forwood, Paola Divieti Pajevic, Jonathan H Gooi, T John Martin, Natalie A Sims
Parathyroid hormone related-protein (PTHrP) and parathyroid hormone (PTH) have N-terminal domains that bind a common receptor, PTHR1. N-terminal PTH (teriparatide) and now a modified N-terminal PTHrP (abaloparatide) are FDA-approved therapies for osteoporosis. In physiology, 00PTHrP does not normally circulate at significant levels, but acts locally and osteocytes, cells residing within the bone matrix, express both PTHrP and the PTHR1. Since PTHR1 in osteocytes is required for normal bone resorption, we determined how osteocyte-derived PTHrP influences the skeleton...
September 15, 2017: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/28904858/maturation-of-phagosomes-containing-different-erythrophagocytic-particles-in-primary-macrophages
#2
Inês B Santarino, Otília V Vieira
Erythrophagocytosis is a physiological process that aims to remove damaged red blood cells from the circulation in order to avoid hemolysis and uncontrolled liberation of iron. Many efforts have been made to understand heme trafficking inside macrophages, but little is known about the maturation of phagosomes containing different types of erythrophagocytic particles with different signals at their surfaces. Therefore, we performed a comparative study on the maturation of phagosomes containing three different models of red blood cells (RBC): aged/senescent, complement-opsonized, and IgG-opsonized...
September 2017: FEBS Open Bio
https://www.readbyqxmd.com/read/28902469/time-dependent-changes-in-the-structure-of-calcified-fibrocartilage-in-the-rat-achilles-tendon-bone-interface-with-sciatic-denervation
#3
Hideaki Takahashi, Hiroyuki Tamaki, Mineo Oyama, Noriaki Yamamoto, Hideaki Onishi
The enthesis transmits a physiological load from soft to hard tissue via fibrocartilage. The histological alterations induced by this physiological loading remain unclear. This study was performed to examine the histomorphological alterations in the collagen fiber bundle alignment and depth of collagen interdigitation between the calcified fibrocartilage and the bone. We examined the Achilles enthesis of rats with sciatic denervation to explore the mechanical effects of structural changes in the enthesis. The parallelism of the collagen fiber bundles was significantly reduced 8 weeks after denervation...
September 13, 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/28901439/long-noncoding-rna%C3%A2-p21-modulates-cellular-senescence-via-the-wnt-%C3%AE-%C3%A2-catenin-signaling-pathway-in-mesenchymal-stem-cells
#4
Wenzheng Xia, Lei Zhuang, Xia Deng, Meng Hou
Mesenchymal stem cell (MSC)‑based therapies have demonstrated efficacy in animal models of cardiovascular diseases. However, MSCs decrease in quantity and quality with age, which reduces their capacity for damage repair. Long noncoding (lnc) RNAs regulate gene transcription and the fate of post‑transcriptional mRNA, affecting a broad range of age‑associated physiological and pathological conditions, including cardiovascular disease and cancer cell senescence. However, the functional role of lncRNAs in stem cell senescence remains largely unknown...
September 7, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28899823/a-predictive-radiological-analysis-of-short-stems-versus-both-shortened-and-long-stems-in-primary-hip-replacement-a-case-control-study-of-100-cases-of-metha-versus-abg-ii-and-omnifit-ha-at-2-8-years-follow-up
#5
Jean-Alain Epinette, Michel Brax, Yves Chammaï
INTRODUCTION: Short hip stems, intended to conserve bone stock and ensure a more physiological distribution of stress in the femur under loading, are meeting with renewed interest. Radiologic semiology is not known exactly, particularly in relation to conventional implants; we therefore conducted a case-control study of 3 types of implant differing only in stem length: short, shortened or long. The aim was 1) to compare radiographic aspects, 2) to attempt to systematize medium-term radiologic status for the 3 types, and 3) to assess the impact of radiographic aspect on loosening and revision rates...
September 9, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/28899666/stem-cells-and-the-circadian-clock
#6
REVIEW
Meltem Weger, Nicolas Diotel, Anne-Claire Dorsemans, Thomas Dickmeis, Benjamin D Weger
The circadian timing system is a complex biological network of interacting circadian clocks that regulates 24h rhythms of behavioral and physiological processes. One intriguing observation is that stem cell homeostasis is subject to circadian clock regulation. Rhythmic oscillations have been observed in a variety of embryonic and adult stem cell dependent processes, such as hematopoietic progenitor cell migration, the hair follicle cycle, bone remodeling, regenerative myogenesis and neurogenesis. This review aims to discuss the nature of the circadian clock in embryonic stem cells and how it changes during differentiation...
September 9, 2017: Developmental Biology
https://www.readbyqxmd.com/read/28898923/repurposing-a-novel-parathyroid-hormone-pth-analog-to-treat-hypoparathyroidism
#7
Venkatesh Krishnan, Yanfei L Ma, Catherine Z Chen, Natasha Thorne, Heather Bullock, Gregory Tawa, Christy Javella-Cauley, Shaoyou Chu, Weiming Li, Wayne Kohn, Mary D Adrian, Charles Benson, Lifei Liu, Masahiko Sato, Wei Zheng, Andre M Pilon, N Nora Yang, Henry U Bryant
BACKGROUND AND PURPOSE: Human parathyroid hormone (PTH) is critical for maintaining physiologic calcium homeostasis, and plays an important role in the formation and maintenance of bone. Full-length PTH and a truncated peptide form are approved for treatment of hypoparathyroidism and osteoporosis, respectively. Our initial goal was to develop an improved PTH therapy for osteoporosis, but clinical development was halted. The novel asset was then repurposed as an improved therapy for hypoparathyroidism...
September 12, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28898758/modular-flow-chamber-for-engineering-bone-marrow-architecture-and-function
#8
Christian A Di Buduo, Paolo M Soprano, Lorenzo Tozzi, Stefania Marconi, Ferdinando Auricchio, David L Kaplan, Alessandra Balduini
The bone marrow is a soft, spongy, gelatinous tissue found in the hollow cavities of flat and long bones that support hematopoiesis in order to maintain the physiologic turnover of all blood cells. Silk fibroin, derived from Bombyx mori silkworm cocoons, is a promising biomaterial for bone marrow engineering, because of its tunable architecture and mechanical properties, the capacity of incorporating labile compounds without loss of bioactivity and demonstrated ability to support blood cell formation. In this study, we developed a bone marrow scaffold consisting of a modular flow chamber made of polydimethylsiloxane, holding a silk sponge, prepared with salt leaching methods and functionalized with extracellular matrix components...
August 8, 2017: Biomaterials
https://www.readbyqxmd.com/read/28894789/impact-of-the-mk-vi-skinsuit-on-skin-microbiota-of-terrestrial-volunteers-and-an-international-space-station-bound-astronaut
#9
Richard A Stabler, Helena Rosado, Ronan Doyle, David Negus, Philip A Carvil, Juan G Kristjánsson, David A Green, Rafael Franco-Cendejas, Cadi Davies, Andreas Mogensen, Jonathan Scott, Peter W Taylor
Microgravity induces physiological deconditioning due to the absence of gravity loading, resulting in bone mineral density loss, atrophy of lower limb skeletal and postural muscles, and lengthening of the spine. SkinSuit is a lightweight compression suit designed to provide head-to-foot (axial) loading to counteract spinal elongation during spaceflight. As synthetic garments may impact negatively on the skin microbiome, we used 16S ribosomal RNA (rRNA) gene amplicon procedures to define bacterial skin communities at sebaceous and moist body sites of five healthy male volunteers undergoing SkinSuit evaluation...
2017: NPJ Microgravity
https://www.readbyqxmd.com/read/28893942/kaposi-sarcoma-herpesvirus-pathogenesis
#10
REVIEW
Giuseppe Mariggiò, Sandra Koch, Thomas F Schulz
Kaposi sarcoma herpesvirus (KSHV), taxonomical name human gammaherpesvirus 8, is a phylogenetically old human virus that co-evolved with human populations, but is now only common (seroprevalence greater than 10%) in sub-Saharan Africa, around the Mediterranean Sea, parts of South America and in a few ethnic communities. KSHV causes three human malignancies, Kaposi sarcoma, primary effusion lymphoma, and many cases of the plasmablastic form of multicentric Castleman's disease (MCD) as well as occasional cases of plasmablastic lymphoma arising from MCD; it has also been linked to rare cases of bone marrow failure and hepatitis...
October 19, 2017: Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
https://www.readbyqxmd.com/read/28889783/sex-chromosome-changes-in-leukemia-cytogenetics-and-molecular-aspects
#11
Saeid Shahrabi, Elahe Khodadi, Fakhredin Saba, Mohammad Shahjahani, Najmaldin Saki
BACKGROUND AND OBJECTIVE: Sex chromosome loss (SCL) can occur in older men as a physiological phenomenon or as an acquired abnormality in leukemia. Loss of chromosome Y and loss of chromosome X are acquired disorders that are mainly observed in patients over 80 years as well as in myeloid and lymphoid malignancies. In this review, we examine the cytogenetic and molecular changes of sex chromosomes in leukemia. METHODS: Relevant English language literature were searched and retrieved from PubMed search engine (1990-2016)...
September 10, 2017: Hematology (Amsterdam, Netherlands)
https://www.readbyqxmd.com/read/28889194/functions-of-periostin-in-dental-tissues-and-its-role-in-periodontal-tissues-regeneration
#12
REVIEW
Juan Du, Minqi Li
The goal of periodontal regenerative therapy is to predictably restore the tooth's supporting periodontal tissues and form a new connective tissue attachment of periodontal ligament (PDL) fibers and new alveolar bone. Periostin is a matricellular protein so named for its expression primarily in the periosteum and PDL of adult mice. Its biological functions have been widely studied in areas such as cardiovascular physiology and oncology. Despite being initially identified in the dental tissues and bone, investigations of Periostin functions in PDL and alveolar-bone-related physiopathology are less abundant...
September 9, 2017: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/28886304/the-roles-of-vasohibin-and-its-family-members-beyond-angiogenesis-modulators
#13
Hua Du, Jing Zhao, Ling Hai, Jing Wu, Hua Yi, Yonghong Shi
Vasohibin-1 is an intrinsic angiogenesis inhibitor, and is expressed in endothelial cells via induction by pro-angiogenesis factors. It is known to inhibit several processes of angiogenesis, with different mechanisms from extrinsic angiogenesis inhibitors. Vasohibin-2 is mainly expressed by mononuclear cells which have been mobilized from bone marrow. It not only promotes angiogenesis, but also modulates the releases of FGF-2 and VEGF, which are the two major inducers for vasohibin1. Hypoxic environment induces the expression of hypoxia-inducible Factor 1α with a result of VEGF release nearly in all tumor cell lines and tissues...
September 8, 2017: Cancer Biology & Therapy
https://www.readbyqxmd.com/read/28884125/green-tea-extracts-epigallocatechin-3-gallate-for-different-treatments
#14
REVIEW
Chenyu Chu, Jia Deng, Yi Man, Yili Qu
Epigallocatechin-3-gallate (EGCG), a component extracted from green tea, has been proved to have multiple effects on human pathological and physiological processes, and its mechanisms are discrepant in cancer, vascularity, bone regeneration, and nervous system. Although there are multiple benefits associated with EGCG, more and more challenges are still needed to get through. For example, EGCG shows low bioactivity via oral administration. This review focuses on effects of EGCG, including anti-cancer, antioxidant, anti-inflammatory, anticollagenase, and antifibrosis effects, to express the potential of EGCG and necessity of further studies in this field...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28884113/in-vitro-culture-of-na%C3%A3-ve-human-bone-marrow-mesenchymal-stem-cells-a-stemness-based-approach
#15
REVIEW
Bidisha Pal, Bikul Das
Human bone marrow derived mesenchymal stem cells (BM-MSCs) resides in their niches in close proximity to hematopoietic stem cells (HSCs). These naïve MSCs have tremendous potential in regenerative therapeutics, and may also be exploited by cancer and infectious disease agents. Hence, it is important to study the physiological and pathological roles of naïve MSC. However, our knowledge of naïve MSCs is limited by lack of appropriate isolation and in vitro culture methods. Established culture methods use serum rich media, and serial passaging for retrospective isolation of MSCs...
2017: Frontiers in Cell and Developmental Biology
https://www.readbyqxmd.com/read/28882520/dynamic-foraminal-dimensions-during-neck-extension-and-rotation-in-fusion-and-artificial-disc-replacement-an-observational-study
#16
Yener N Yeni, Timothy Baumer, Daniel Oravec, Azam Basheer, Colin P McDonald, Michael J Bey, Stephen W Bartol, Victor Chang
BACKGROUND: Changes in the dimensions of the cervical neural foramina (CNF) are considered to be a key factor in nerve root compression and development of cervical radiculopathy. However, to what extent foraminal geometry differs between patients who underwent anterior cervical discectomy and fusion (ACDF) and those who underwent total disc arthroplasty with an artificial disc (AD) during physiological motion is largely unknown. PURPOSE: The objective of this study is to compare compare CNF dimensions during physiological neck motion between ACDF and AD...
September 4, 2017: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/28881833/lncrna-h19-mediates-bmp9-induced-osteogenic-differentiation-of-mesenchymal-stem-cells-mscs-through-notch-signaling
#17
Junyi Liao, Xinyi Yu, Xue Hu, Jiaming Fan, Jing Wang, Zhicai Zhang, Chen Zhao, Zongyue Zeng, Yi Shu, Ruyi Zhang, Shujuan Yan, Yasha Li, Wenwen Zhang, Jing Cui, Chao Ma, Li Li, Yichun Yu, Tingting Wu, Xingye Wu, Jiayan Lei, Jia Wang, Chao Yang, Ke Wu, Ying Wu, Jun Tang, Bai-Cheng He, Zhong-Liang Deng, Hue H Luu, Rex C Haydon, Russell R Reid, Michael J Lee, Jennifer Moriatis Wolf, Wei Huang, Tong-Chuan He
Mesenchymal stem cells (MSCs) are multipotent progenitor cells that can undergo self-renewal and differentiate into multiple lineages. Osteogenic differentiation from MSCs is a well-orchestrated process and regulated by multiple signaling pathways. We previously demonstrated that BMP9 is one of the most potent osteogenic factors. However, molecular mechanism through which BMP9 governs osteoblastic differentiation remains to be fully understood. Increasing evidence indicates noncoding RNAs (ncRNAs) may play important regulatory roles in many physiological and/or pathologic processes...
August 8, 2017: Oncotarget
https://www.readbyqxmd.com/read/28880886/the-osteogenic-cell-surface-marker-bril-ifitm5-is-dispensable-for-bone-development-and-homeostasis-in-mice
#18
Alexa Patoine, Abdallah Husseini, Bahar Kasaai, Marie-Hélène Gaumond, Pierre Moffatt
BRIL (bone-restricted IFITM-like), is a short transmembrane protein expressed almost exclusively in osteoblasts. Although much is known about its bone-restricted gene expression pattern and protein biochemical and topological features, little information is available for BRIL physiological function. Two autosomal dominant forms of osteogenesis imperfecta (OI) are caused by distinct, but recurrent mutations in the BRIL gene. Yet, the underlying mechanisms by which those mutations lead to OI are still poorly understood...
2017: PloS One
https://www.readbyqxmd.com/read/28877877/acute-blood-loss-stimulates-fibroblast-growth-factor-23-production
#19
Seham Rabadi, Ikemesit Udo, David Evan Leaf, Sushrut Waikar, Marta Christov
Fibroblast growth factor 23 (FGF23) production is upregulated by iron deficiency and hypoxia. However, the influence of acute blood loss, and the resulting increases in circulating erythropoietin, on FGF23 production is unknown. Using wild-type C57BL/6 mice, we show that acute loss of 10% total blood volume leads to an increase in plasma C-terminal FGF23 (cFGF23) levels within six hours, while plasma levels of intact FGF23, phosphate, calcium, parathyroid hormone, iron, and ferritin remain similar to control mice without acute blood loss...
September 6, 2017: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/28875135/clinical-and-biological-analysis-in-graftless-maxillary-sinus-lift
#20
REVIEW
Marcelo Parra, Sergio Olate, Mario Cantín
Maxillary sinus lift for dental implant installation is a well-known and versatile technique; new techniques are presented based on the physiology of intrasinus bone repair. The aim of this review was to determine the status of graftless maxillary sinus lift and analyze its foundations and results. A search was conducted of the literature between 1995 and 2015 in the Medline, ScienceDirect, and SciELO databases using the keywords "maxillary sinus lift," "blood clot," "graftless maxillary sinus augmentation," and "dental implant placement...
August 2017: Journal of the Korean Association of Oral and Maxillofacial Surgeons
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