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Eiji Osaka Xiaoqian Yang Jacson K. Shen Pei Yang Yong Feng Henry J. Mankin Francis J. Hornicek Zhenfeng Duan 《Journal of orthopaedic research》2014,32(8):1075-1082
Recent studies have revealed that expression of miRNA‐1 (miR‐1) is frequently down‐regulated in several cancer types including chordoma. Identifying and validating novel targets of miR‐1 is useful for understanding the roles of miR‐1 in chordoma. We aimed to further investigate the functions of miR‐1 in chordoma. Specifically, we assessed whether restoration of miR‐1 affects cell migration and invasion in chordoma, and focused on the miR‐1 potential target Slug gene. Migratory and invasive activities were assessed by wound healing and Matrigel invasion assays, respectively. Cell proliferation was determined by MTT assay. Slug expression was evaluated by Western blot, immunofluorescence, and immunohistochemistry. Restoration of miR‐1 expression suppressed the migratory and invasive activities of chordoma cells. Transfection of miR‐1 inhibited cell proliferation both time‐ and dose‐dependently in chordoma. MiR‐1 transfected cells showed inhibited Slug expression. Slug was over‐expressed in chordoma cell lines and advanced chordoma tissues. In conclusion, we have shown that miR‐1 directly targets the Slug gene in chordoma. Restoration of miR‐1 suppressed not only proliferation, but also migratory and invasive activities, and reduced the Slug expression in chordoma cells. These results collectively indicate that miR‐1/Slug pathway is a potential therapeutic target because of its crucial roles in chordoma cell growth and migration. © 2014 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 32:1075–1082, 2014. 相似文献
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Evaluation of Hyphecan (1‐4,2‐acetamide‐deoxy‐B‐D‐glucan polymer) on wound healing in a rodent model
Objective: To evaluate the effect of an artificial skin Hyphecan (1‐4,2‐acetamide‐deoxy‐B ‐D ‐glucan polymer) on wound healing in a rodent model. Materials and Method: The prospective study was conducted at a basic science laboratory at a tertiary teaching hospital. Two 4 cm × 4 cm full‐thickness wounds were created on the dorsal surface of 10 Spraque–Dawley rats and covered with Hyphecan and Kaltostat, respectively. Wounds were examined and measured on days 4, 10, 21 and 28, and would continue after day 28 until healed up completely. Punch biopsies (3 mm) were taken on days 4, 10 and 28 for histological examination of the response of healing and repair. Results: Despite the fact that the wound healing rate was similar for both groups on days 4, 10, 21 and 28, the average healing time for the Hyphecan group (29.1 ± 1.7 days) was significantly shorter statistically (P = 0.03) than the Kaltostat group (30.7 ± 2.8 days). Conversely, the marked healing response elicited by Hyphecan on day 4 persisted on days 10 and 28 in contrast to Kaltostat, which had only a mild degree of healing response on days 10 and 28. The study suggests that wounds treated by Hyphecan heal faster than Kaltostat. Conclusion: The findings provide basic scientific evidence supporting the clinical use of Hyphecan in different wounds and might also reduce the cost of wound management as Hyphecan is cheaper than Kaltostat and requires a shorter treatment time. 相似文献
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Using Serological Proteome Analysis to Identify Serum Anti‐Nucleophosmin 1 Autoantibody as a Potential Biomarker in European‐American and African‐American Patients With Prostate Cancer
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Liping Dai Jitian Li Mengtao Xing Tino W. Sanchez Carlos A. Casiano Jian‐Ying Zhang 《The Prostate》2016,76(15):1375-1386
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Non‐Adrenergic,Tamsulosin‐Insensitive Smooth Muscle Contraction is Sufficient to Replace α1‐Adrenergic Tension in the Human Prostate
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Martin Hennenberg Alice Acevedo Nicolas Wiemer Aysenur Kan Alexander Tamalunas Yiming Wang Qingfeng Yu Beata Rutz Anna Ciotkowska Annika Herlemann Frank Strittmatter Christian G. Stief Christian Gratzke 《The Prostate》2017,77(7):697-707
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SDF‐1/CXCR4 Axis in Tie2‐Lineage Cells Including Endothelial Progenitor Cells Contributes to Bone Fracture Healing
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Yohei Kawakami Masaaki Ii Tomoyuki Matsumoto Ryosuke Kuroda Tomoya Kuroda Sang‐Mo Kwon Atsuhiko Kawamoto Hiroshi Akimaru Yutaka Mifune Taro Shoji Tomoaki Fukui Masahiro Kurosaka Takayuki Asahara 《Journal of bone and mineral research》2015,30(1):95-105
CXC chemokine receptor 4 (CXCR4) is a specific receptor for stromal‐derived‐factor 1 (SDF‐1). SDF‐1/CXCR4 interaction is reported to play an important role in vascular development. On the other hand, the therapeutic potential of endothelial progenitor cells (EPCs) in fracture healing has been demonstrated with mechanistic insight of vasculogenesis/angiogenesis and osteogenesis enhancement at sites of fracture. The purpose of this study was to investigate the influence of the SDF‐1/CXCR4 pathway in Tie2‐lineage cells (including EPCs) in bone formation. We created CXCR4 gene conditional knockout mice using the Cre/loxP system and set two groups of mice: Tie2‐CreER CXCR4 knockout mice (CXCR4?/?) and wild‐type mice (WT). We report here that in vitro, EPCs derived from of CXCR4?/? mouse bone marrow demonstrated severe reduction of migration activity and EPC colony‐forming activity when compared with those derived from WT mouse bone marrow. In vivo, radiological and morphological examinations showed fracture healing delayed in the CXCR4?/? group and the relative callus area at weeks 2 and 3 was significantly smaller in CXCR4?/? group mice. Quantitative analysis of capillary density at perifracture sites also showed a significant decrease in the CXCR4?/? group. Especially, CXCR4?/?group mice demonstrated significant early reduction of blood flow recovery at fracture sites compared with the WT group in laser Doppler perfusion imaging analysis. Real‐time RT‐PCR analysis showed that the gene expressions of angiogenic markers (CD31, VE‐cadherin, vascular endothelial growth factor [VEGF]) and osteogenic markers (osteocalcin, collagen 1A1, bone morphogenetic protein 2 [BMP2]) were lower in the CXCR4?/? group. In the gain‐of‐function study, the fracture in the SDF‐1 intraperitoneally injected WT group healed significantly faster with enough callus formation compared with the SDF‐1 injected CXCR4?/? group. We demonstrated that an EPC SDF‐1/CXCR4 axis plays an important role in bone fracture healing using Tie2‐CreER CXCR4 conditional knockout mice. © 2014 American Society for Bone and Mineral Research. 相似文献
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Earlier use of androgen receptor‐axis‐targeted drugs may improve overall survival in patients with non‐metastatic castration‐resistant prostate cancer
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Keiichiro Mori Takahiro Kimura Kagenori Ito Hajime Onuma Masatoshi Tanaka Taishi Matsuura Gaku Kurokawa Kosuke Iwatani Yuzo Inaba Keigo Sakanaka Hiroshi Sasaki Jun Miki Tatsuya Shimomura Kenta Miki Shin Egawa 《The Prostate》2018,78(10):766-772
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Weizhe Li Takashi Sakai Takashi Nishii Nobuo Nakamura Masaki Takao Hideki Yoshikawa Nobuhiko Sugano 《Journal of orthopaedic research》2009,27(5):694-700
Osteogenesis and angiogenesis are closely associated with the reparative process in bone. In osteonecrosis of the femoral head (ONFH), although the progression of bone resorption by osteoclasts is considered to be followed by femoral head collapse, the reparative reaction remains unknown. In order to investigate the reparative reaction in patients with ONFH, the distribution of TRAP‐ positive cells and expression of HIF‐1α, VEGF, and FGF‐2 were observed in 51 hips in 42 patients. TRAP‐positive cells were detected around the teres insertion and retinaculum in the early radiologic stage, and increased around the new trabecular bone throughout the reparative interface zone in the late collapsed stage. HIF‐1α expression was detected at the fibrosis area and the transitional area, which included the proximal area of the reparative interface zone adjacent to the necrotic zone. VEGF was expressed at the edematous area of the reparative interface zone, while FGF‐2 was detected widely in the reparative interface zone and the normal zone. In the late radiologic stages, HIF‐1α, VEGF, and FGF‐2 were not detected in the necrotic zone, and they acted in angiogenesis in the reparative interface zone, while TRAP‐positive cells increased around the new bone formation in response to remodeling after the collapse. © 2008 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 27: 694–700, 2009 相似文献
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Pretreatment lymphocyte‐to‐monocyte ratio as an independent prognostic factor for head and neck cancer
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Satoshi Kano MD PhD Akihiro Homma MD PhD Hiromitsu Hatakeyama MD PhD Takatsugu Mizumachi MD PhD Tomohiro Sakashita MD PhD Tomohiko Kakizaki MD Satoshi Fukuda MD PhD 《Head & neck》2017,39(2):247-253
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Positive effect of IGF‐1 injection on gastrocnemius of rat during distraction osteogenesis
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Rui Feng Xinlong Ma Jianxiong Ma Haobo Jia Baoyi Ma Liyan Xu Aifeng Liu 《Journal of orthopaedic research》2015,33(10):1424-1432
Distraction osteogenesis (DO) is used to form new bone between bone segments to lengthen the callus. Skeletal muscles frequently fail to adapt to distraction, which causes complications. Insulin‐like growth factor‐1 (IGF‐1) has been implicated as a central regulator of muscle repair. We hypothesized that IGF‐1 injection could reduce muscle complications in DO. A total of 102 Sprague‐Dawley rats received DO or did not were randomly assigned into saline, IGF‐1 and normal groups. On the day before the distraction, the rats in the IGF‐1 group were injected with IGF‐1. The gastrocnemius muscles of the rats were harvested at the 0, 1st, 4th, 7th, and 10th days of distraction. The weight of the muscles, cross‐sectional area (CSA) of the muscle fibers, collagen volume fraction (CVF), maximum limit load (MLL), maximum contraction forces, and gene expression of Akt, MyoD, myogenin, myostatin, and collagen I were analyzed. The results indicated that IGF‐1 injection had increased the weights, CSA of the muscle fibers, MLL and force generation of the gastrocnemius. Also, Akt, MyoD, and myogenin were upregulated, and myostatin was downregulated in the IGF‐1 group. Injection of IGF‐1 could attenuate the gastrocnemius atrophy, prevent fibrosis, increase MLL, and regulate the related mRNA. © 2015 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 33:1424–1432, 2015. 相似文献
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Expression profile and in vitro blockade of programmed death‐1 in human papillomavirus–negative head and neck squamous cell carcinoma
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Ian‐James Malm MD Tullia C. Bruno PhD Juan Fu PhD Qi Zeng PhD Janis M. Taube MD William Westra MD Drew Pardoll MD PhD Charles G. Drake MD PhD Young J. Kim MD PhD 《Head & neck》2015,37(8):1088-1095
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Immunotherapy synergizes with debridement and antibiotic therapy in a murine 1‐stage exchange model of MRSA implant‐associated osteomyelitis
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Noriaki Yokogawa Masahiro Ishikawa Kohei Nishitani Christopher A. Beck Hiroyuki Tsuchiya Addisu Mesfin Stephen L. Kates John L. Daiss Chao Xie Edward M. Schwarz 《Journal of orthopaedic research》2018,36(6):1590-1598
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CKMT1 and NCOA1 expression as a predictor of clinical outcome in patients with advanced‐stage head and neck squamous cell carcinoma
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Miguel Angel Pavón PhD Matilde Parreño PhD Marta Téllez–Gabriel PhD Xavier León MD PhD Irene Arroyo–Solera MSc Montserrat López MD PhD Maria Virtudes Céspedes PhD Isolda Casanova PhD Alberto Gallardo MD PhD Antonio López–Pousa MD Maria Antonia Mangues PhD Miquel Quer MD PhD Agustí Barnadas MD PhD Ramón Mangues PhD 《Head & neck》2016,38(Z1):E1392-E1403