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https://www.readbyqxmd.com/read/28624657/adiponectin-improves-the-osteointegration-of-titanium-implant-under-diabetic-conditions-by-reversing-mitochondrial-dysfunction-via-the-ampk-pathway-in-vivo-and-in-vitro
#1
Xiao-Fan Hu, Lin Wang, Yi-Zhao Lu, Geng Xiang, Zi-Xiang Wu, Ya-Bo Yan, Yang Zhang, Xiong Zhao, Yuan Zang, Lei Shi, Wei Lei, Ya-Fei Feng
Diabetes-induced reactive oxygen species (ROS) overproduction would result in compromised osteointegration of titanium implant (TI) and high rate of implant failure, yet the underlying mechanisms remain elusive. Adiponectin (APN) is a fat-derived adipocytokine with strong antioxidant, mitochondrial-protective and anti-diabetic efficacies. We hypothesized that mitochondrial dysfunction under diabetes may account for the oxidative stress in osteoblasts and titanium-bone interface (TBI) instability, which could be ameliorated by APN...
June 14, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28611371/ohmyungsamycins-promote-antimicrobial-responses-through-autophagy-activation-via-amp-activated-protein-kinase-pathway
#2
Tae Sung Kim, Yern-Hyerk Shin, Hye-Mi Lee, Jin Kyung Kim, Jin Ho Choe, Ji-Chan Jang, Soohyun Um, Hyo Sun Jin, Masaaki Komatsu, Guang-Ho Cha, Han-Jung Chae, Dong-Chan Oh, Eun-Kyeong Jo
The induction of host cell autophagy by various autophagy inducers contributes to the antimicrobial host defense against Mycobacterium tuberculosis (Mtb), a major pathogenic strain that causes human tuberculosis. In this study, we present a role for the newly identified cyclic peptides ohmyungsamycins (OMS) A and B in the antimicrobial responses against Mtb infections by activating autophagy in murine bone marrow-derived macrophages (BMDMs). OMS robustly activated autophagy, which was essentially required for the colocalization of LC3 autophagosomes with bacterial phagosomes and antimicrobial responses against Mtb in BMDMs...
June 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28565745/-study-on-autophagy-in-nucleated-red-blood-cells-in-patients-with-myelodysplastic-syndromes
#3
L Y Yang, H Q Wang, R Fu, W Qu, E B Ruan, X M Wang, G J Wang, Y H Wu, H Liu, J Song, J Guan, L M Xing, L J Li, H J Jiang, H Liu, Y H Wang, C Y Liu, W Zhang, Z H Shao
Objective: To investigate the change of autophagy level of bone marrow nucleated red blood cell (RBC) in patients with myelodysplastic syndromes (MDS) . Methods: Fifty-four MDS patients and thirty-three controls were enrolled in this study. The mitophagy were observed by transmission electron microscopy (TEM) . The level of autophagy-associated protein LC3B in GlycoA(+) nucleated RBC was measured by flow cytometry. The expressions of ULK1 and mTOR mRNA in GlycoA(+) nucleated RBC were measured by real-time PCR...
May 14, 2017: Zhonghua Xue Ye Xue za Zhi, Zhonghua Xueyexue Zazhi
https://www.readbyqxmd.com/read/28494141/metformin-induces-osteoblastic-differentiation-of-human-induced-pluripotent-stem-cell-derived-mesenchymal-stem-cells
#4
Ping Wang, Tao Ma, Dong Guo, Kevin Hu, Yan Shu, Hockin H K Xu, Abraham Schneider
Metformin, a first-line anti-diabetic drug used by millions of patients has been shown to have potential osteogenic properties. The present study was performed to test the hypothesis that clinically relevant doses of metformin promote the osteogenic differentiation and mineralization of induced Pluripotent Stem Cell-derived Mesenchymal Stem Cells (iPSC-MSCs). iPSC-MSCs were treated with metformin (10 μM) to assess cell viability, osteogenic differentiation, mineralization, and activation of the LKB1/AMP-activated protein kinase (AMPK) signaling pathway, a surrogate marker of metformin action...
May 11, 2017: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/28494020/pannexin-3-regulates-proliferation-and-differentiation-of-odontoblasts-via-its-hemichannel-activities
#5
Tsutomu Iwamoto, Takashi Nakamura, Masaki Ishikawa, Keigo Yoshizaki, Asuna Sugimoto, Hiroko Ida-Yonemochi, Hayato Ohshima, Masahiro Saito, Yoshihiko Yamada, Satoshi Fukumoto
Highly coordinated regulation of cell proliferation and differentiation contributes to the formation of functionally shaped and sized teeth; however, the mechanism underlying the switch from cell cycle exit to cell differentiation during odontogenesis is poorly understood. Recently, we identified pannexin 3 (Panx3) as a member of the pannexin gap junction protein family from tooth germs. The expression of Panx3 was predominately localized in preodontoblasts that arise from dental papilla cells and can differentiate into dentin-secreting odontoblasts...
2017: PloS One
https://www.readbyqxmd.com/read/28493442/upa-derived-peptide-%C3%A3-6-is-involved-in-the-suppression-of-lipopolysaccaride-promoted-inflammatory-osteoclastogenesis-and-the-resultant-bone-loss
#6
Yosuke Kanno, Chihiro Maruyama, Ayaka Matsuda, Akira Ishisaki
INTRODUCTION: Chronic inflammatory diseases such as rheumatoid arthritis and periodontitis frequently cause bone destruction. Inflammation-induced bone loss results from the increase of bone-resorbing osteoclasts. Recently, we demonstrated that urokinase type plasminogen activator (uPA) suppressed lipopolysaccaride (LPS)-inflammatory osteoclastogenesis through the adenosine monophosphate-activated protein kinase (AMPK) pathway, whereas its receptor (uPAR) promoted that through the Akt pathway...
May 11, 2017: Immunity, Inflammation and Disease
https://www.readbyqxmd.com/read/28424584/hif-1%C3%AE-overexpression-improves-transplanted-bone-mesenchymal-stem-cells-survival-in-rat-mcao-stroke-model
#7
Bingke Lv, Feng Li, Jianbang Han, Jie Fang, Limin Xu, Chengmei Sun, Tian Hua, Zhongfei Zhang, Zhiming Feng, Xiaodan Jiang
Bone mesenchymal stem cells (BMSCs) death after transplantation is a serious obstacle impacting on the outcome of cell therapy for cerebral infarction. This study was aimed to investigate whether modification of BMSCs with hypoxia-inducible factor 1α (Hif-1α) could enhance the survival of the implanted BMSCs. BMSCs were isolated from Wistar rats, and were infected with Hif-1α-GFP lentiviral vector or Hif-1α siRNA. The modified BMSCs were exposed to oxygen-glucose deprivation (OGD) condition, cellular viability and apoptosis were then assessed...
2017: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/28367764/formononetin-an-isoflavone-activates-amp-activated-protein-kinase-%C3%AE-catenin-signalling-to-inhibit-adipogenesis-and-rescues-c57bl-6-mice-from-high-fat-diet-induced-obesity-and-bone-loss
#8
Jyoti Gautam, Vikram Khedgikar, Priyanka Kushwaha, Dharmendra Choudhary, Geet Kumar Nagar, Kapil Dev, Preety Dixit, Divya Singh, Rakesh Maurya, Ritu Trivedi
Balance between adipocyte and osteoblast differentiation is the key link of disease progression in obesity and osteoporosis. We have previously reported that formononetin (FNT), an isoflavone extracted from Butea monosperma, stimulates osteoblast formation and protects against postmenopausal bone loss. The inverse relationship between osteoblasts and adipocytes prompted us to analyse the effect of FNT on adipogenesis and in vivo bone loss, triggered by high-fat diet (HFD)-induced obesity. The anti-obesity effect and mechanism of action of FNT was determined in 3T3-L1 cells and HFD-induced obese male mice...
March 2017: British Journal of Nutrition
https://www.readbyqxmd.com/read/28334504/regulated-in-development-and-dna-damage-response-1-deficiency-impairs-autophagy-and-mitochondrial-biogenesis-in-articular-cartilage-and-increases-the-severity-of-experimental-osteoarthritis
#9
Oscar Alvarez-Garcia, Tokio Matsuzaki, Merissa Olmer, Lars Plate, Jeffery W Kelly, Martin K Lotz
OBJECTIVE: Regulated in development and DNA damage response 1 (REDD1) is an endogenous inhibitor of mechanistic target of rapamycin (mTOR) that regulates cellular stress responses. REDD1 expression is decreased in aged and osteoarthritic (OA) cartilage, and it regulates mTOR signaling and autophagy in articular chondrocytes in vitro. This study was undertaken to investigate the effects of REDD1 deletion in vivo using a mouse model of experimental OA. METHODS: OA severity was histologically assessed in 4-month-old wild-type and REDD1(-/-) mice subjected to surgical destabilization of the medial meniscus (DMM)...
March 23, 2017: Arthritis & Rheumatology
https://www.readbyqxmd.com/read/28330873/amp-activated-protein-kinase-%C3%AE-1-promotes-atherogenesis-by-increasing-monocyte-to-macrophage-differentiation
#10
Miao Zhang, Huaiping Zhu, Ye Ding, Zhaoyu Liu, Zhejun Cai, Ming-Hui Zou
Monocyte-to-macrophage differentiation, which can be initiated by physiological or atherogenic factors, is a pivotal process in atherogenesis, a disorder in which monocytes adhere to endothelial cells and subsequently migrate into the subendothelial spaces, where they differentiate into macrophages and macrophage-derived foam cells and cause atherosclerotic lesions. However, the monocyte-differentiation signaling pathways that are activated by atherogenic factors are poorly defined. Here we report that the AMP-activated protein kinase α1 (AMPKα1) in monocytes promotes atherosclerosis by increasing monocyte differentiation and survival...
May 12, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28282788/berberine-inhibits-palmitate-induced-nlrp3-inflammasome-activation-by-triggering-autophagy-in-macrophages-a-new-mechanism-linking-berberine-to-insulin-resistance-improvement
#11
Hang Zhou, Lili Feng, Fang Xu, Yi Sun, Yuxiang Ma, Xiong Zhang, Hailiang Liu, Ge Xu, Xuefeng Wu, Yan Shen, Yang Sun, Xudong Wu, Qiang Xu
NLRP3 (Nod-like receptor family pyrin domain containing 3) inflammasome has been reported to contribute to obesity-induced inflammation and insulin resistance. However, there are few drugs targeting NLRP3 inflammasome for the treatment of insulin resistance. In the present study, we showed that berberine (BBR) significantly suppressed saturated fatty acid palmitate (PA)-induced NLRP3 inflammasome activation and interleukin-1β (IL-1β) release in macrophages, which was one of the most important mediators in the insulin sensitivity of adipose tissue...
May 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28235712/ampk-activation-reduces-the-number-of-atheromata-macrophages-in-apoe-deficient-mice
#12
Jing Wang, Ang Ma, Ming Zhao, Haibo Zhu
BACKGROUND AND AIMS: CC chemokine receptor 2 (Ccr2) governs migration of inflammatory Ly6C(hi) monocytes from the bone marrow (BM) to the circulating blood, which is a key step for macrophage accumulation during progression of atherosclerosis. Hyperlipidemia is often accompanied by low AMP-activated kinase (AMPK) activity and increased expression of Ccr2. The aim of this study was to examine whether there is a link between AMPK and chemokine networks. METHODS: ApoE(-/-) mice were fed a western diet and treated daily with AMPK activators (AICAR, A769662, or Metformin) or vehicle for 10 weeks...
March 2017: Atherosclerosis
https://www.readbyqxmd.com/read/28213588/a-differential-autophagy-dependent-response-to-dna-double-strand-breaks-in-bone-marrow-mesenchymal-stem-cells-from-sporadic-als-patients
#13
Shane Wald-Altman, Edward Pichinuk, Or Kakhlon, Miguel Weil
Amyotrophic lateral sclerosis (ALS) is an incurable motor neurodegenerative disease caused by a diversity of genetic and environmental factors that leads to neuromuscular degeneration and has pathophysiological implications in non-neural systems. Our previous work showed abnormal levels of mRNA expression for biomarker genes in non-neuronal cell samples from ALS patients. The same genes proved to be differentially expressed in the brain, spinal cord and muscle of the SOD1(G93A) ALS mouse model. These observations support the idea that there is a pathophysiological relevance for the ALS biomarkers discovered in human mesenchymal stem cells (hMSCs) isolated from bone marrow samples of ALS patients (ALS-hMSCs)...
May 1, 2017: Disease Models & Mechanisms
https://www.readbyqxmd.com/read/28198538/role-of-pin1-on-in-vivo-periodontal-tissue-and-in-vitro-cells
#14
K-H Park, E-H Cho, W-J Bae, H-S Kim, H-C Lim, Y-D Park, M-O Lee, E-S Cho, E-C Kim
BACKGROUND: Although expression of peptidyl-prolyl cis/trans isomerase NIMA-interacting 1 (PIN1) was reported in bone tissue, the precise role of PIN1 in periodontal tissue and cells remain unclear. MATERIAL & METHODS: To elucidate the roles of PIN1 in periodontal tissue, its expression in periodontal tissue and cells, and effects on in vitro 4 osteoblast differentiation and the underlying signaling mechanisms were evaluated. RESULTS: PIN1 was expressed in mouse periodontal tissues including periodontal ligament cells (PDLCs), cementoblasts and osteoblasts at the developing root formation stage (postnatal, PN14) and functional stage of tooth (PN28)...
June 2017: Journal of Periodontal Research
https://www.readbyqxmd.com/read/28189115/n-3-polyunsaturated-fatty-acids-alleviate-high-glucose-mediated-dysfunction-of-endothelial-progenitor-cells-and-prevent-ischemic-injuries-both-in-vitro-and-in-vivo
#15
Shao-Chih Chiu, Che-Yi Chao, En-Pei Isabel Chiang, Jia-Ning Syu, Raymond L Rodriguez, Feng-Yao Tang
Hyperglycemia is associated with a reduced number of endothelial progenitor cells (EPCs) that impairs vascular function. Circulating EPCs play important roles in postnatal neovasculogenesis and the prevention of ischemic injury. Frequent consumption of fish oil (FO) that is abundant with eicosapentaenoic acid (EPA)/docosahexaenoic acid (DHA) is reportedly associated with an alleviation of diabetic complications and a lowered incidence of cardiovascular disease. The aim of this study was to examine whether N-3 polyunsaturated fatty acids such as EPA and DHA would reverse the high glucose-mediated dysfunction of EPCs in vitro and thereby prevent the ischemic injury that occurs under the hyperglycemic conditions in Type 2 diabetes (T2D) db(-/-) mice...
January 28, 2017: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/28176455/adiponectin-promotes-human-jaw-bone-marrow-mesenchymal-stem-cell-chemotaxis-via-cxcl1-and-cxcl8
#16
Yinfei Pu, Mengke Wang, Yingying Hong, Yuwei Wu, Zhihui Tang
Adiponectin (APN) is known to promote the osteogenic differentiation of human jaw bone marrow mesenchymal stem cells (h-JBMMSCs). However, the underlying mechanism has not been fully elucidated. Previously, we showed that APN could promote h-JBMMSC osteogenesis via APPL1-p38 by up-regulating osteogenesis-related genes. Here, we aimed to determine whether APN could promote h-JBMMSC chemotaxis through CXCL1/CXCL8. The CCK-8, wound healing and transwell assays were used to evaluate the proliferation, migration and chemotaxis of h-JBMMSCs with or without APN treatment...
February 8, 2017: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/28108519/bone-marrow-adipocytes-facilitate-fatty-acid-oxidation-activating-ampk-and-a-transcriptional-network-supporting-survival-of-acute-monocytic-leukemia-cells
#17
Yoko Tabe, Shinichi Yamamoto, Kaori Saitoh, Kazumasa Sekihara, Norikazu Monma, Kazuho Ikeo, Kaoru Mogushi, Masato Shikami, Vivian Ruvolo, Jo Ishizawa, Numsen Hail, Saiko Kazuno, Mamoru Igarashi, Hiromichi Matsushita, Yasunari Yamanaka, Hajime Arai, Isao Nagaoka, Takashi Miida, Yoshihide Hayashizaki, Marina Konopleva, Michael Andreeff
Leukemia cells in the bone marrow must meet the biochemical demands of increased cell proliferation and also survive by continually adapting to fluctuations in nutrient and oxygen availability. Thus, targeting metabolic abnormalities in leukemia cells located in the bone marrow is a novel therapeutic approach. In this study, we investigated the metabolic role of bone marrow adipocytes in supporting the growth of leukemic blasts. Prevention of nutrient starvation-induced apoptosis of leukemic cells by bone marrow adipocytes, as well as the metabolic and molecular mechanisms involved in this process, was investigated using various analytic techniques...
March 15, 2017: Cancer Research
https://www.readbyqxmd.com/read/28063979/calcium-phosphate-phosphorylated-adenosine-hybrid-microspheres-for-anti-osteosarcoma-drug-delivery-and-osteogenic-differentiation
#18
Zi-Fei Zhou, Tuan-Wei Sun, Feng Chen, Dong-Qing Zuo, Hong-Sheng Wang, Ying-Qi Hua, Zheng-Dong Cai, Jun Tan
Biocompatibility, biodegradability and bioactivity are significantly important in practical applications of various biomaterials for bone tissue engineering. Herein, we develop a functional inorganic-organic hybrid system of calcium phosphate-phosphorylated adenosine (CPPA). Both calcium phosphate and phosphorylated adenosine molecules in CPPA are fundamental components in mammalians and play important roles in biological metabolism. In this work, we report our three leading research qualities: (1) CPPA hybrid microspheres with hollow and porous structure are synthesized by a facile one-step microwave-assisted solvothermal method; (2) CPPA hybrid microspheres show high doxorubicin loading capacity and pH-responsive drug release properties, and demonstrate positive therapeutic effects on six osteosarcoma cell lines in vitro and a mouse model of 143B osteosarcoma subcutaneous tumor in vivo; (3) CPPA hybrid microspheres are favorable to promote osteogenic differentiation of human bone mesenchymal stem cells (hBMSCs) by activating the AMPK pathway, with satisfactory evidences from cellular alkaline phosphatase staining, alizarin red staining, real time PCR and western analysis...
March 2017: Biomaterials
https://www.readbyqxmd.com/read/27917698/tetramethylpyrazine-protects-against-glucocorticoid-induced-apoptosis-by-promoting-autophagy-in-mesenchymal-stem-cells-and-improves-bone-mass-in-glucocorticoid-induced-osteoporosis-rats
#19
Long Wang, Hong-Yang Zhang, Bo Gao, Jun Shi, Qiang Huang, Yue-Hu Han, Ya-Qian Hu, Wei-Guang Lu, Zhuo-Jie Zhao, Bao-Hua Liu, Qiang Jie, Liu Yang, Zhuo-Jing Luo
Glucocorticoid-induced osteoporosis (GIOP) is a widespread clinical complication due to the common use of glucocorticoids. Excess glucocorticoids induce apoptosis of bone marrow-derived mesenchymal stem cells (BMSCs), which have been shown to play an increasingly important role in the pathogenesis and therapy of osteoporosis. Tetramethylpyrazine (TMP), an extract from one of the most recognized herbs in traditional Chinese medicine (Chuanxiong), has been reported to have antiapoptotic properties. In this study, we tested whether TMP protects rat BMSCs following exposure to glucocorticoids in vitro and in vivo...
March 15, 2017: Stem Cells and Development
https://www.readbyqxmd.com/read/27913299/the-inhibitory-effect-of-beta-lapachone-on-rankl-induced-osteoclastogenesis
#20
Dong Ryun Gu, Joon No Lee, Gi-Su Oh, Hyung Jin Kim, Min Seuk Kim, Seoung Hoon Lee
β-lapachone (β-L) is a substrate of reduced nicotinamide adenine dinucleotide (NADH): quinone oxidoreductase 1 (NQO1). NQO1 reduces quinones to hydroquinones using NADH as an electron donor and consequently increases the intracellular NAD+/NADH ratio. The activation of NQO1 by β-L has beneficial effects on several metabolic syndromes, such as obesity, hypertension, and renal injury. However, the effect of β-L on bone metabolism remains unclear. Here, we show that β-L might be a potent inhibitor of receptor activator of nuclear factor-κB ligand (RANKL)-induced osteoclastogenesis...
January 22, 2017: Biochemical and Biophysical Research Communications
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