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Hayedeh Behzad Shu‐Huei Tsai Paulina Nassab Rouhollah Mousavizadeh Robert G. McCormack Alex Scott 《Journal of orthopaedic research》2015,33(1):9-16
94.
血管紧张素(1~7)对血管加压素诱导心脏成纤维细胞增殖的影响及其与钙调神经磷酸酶的关系 总被引:10,自引:0,他引:10
目的探讨血管紧张素(1~7)[Ang(1~7)]对血管加压素(AVP)诱导心脏成纤维细胞(CFs)增殖的影响及其与钙调神经磷酸酶(CaN)的关系。方法分离培养SD仔鼠CFs,四氮唑盐(MTT)比色法检测细胞增殖,采用流式细胞分析仪技术测定细胞周期,发色底物法测定细胞内CaN的活性。结果(1)10-7mol/LAVP干预24h后,CFs的MTT吸光度值(0.24±0.01)较对照组(0.14±0.01)明显增高(P<0.01);给予10-9~10-6mol/LAng(1~7)和AVP共同干预后,CFs的吸光度值呈递减趋势,分别为0.22±0.01、0.21±0.01、0.18±0.01和0.16±0.01,均较AVP组降低,差异有统计学意义(P<0.01)。(2)AVP刺激后,CFs的S期百分率(14.00±0.94)和增殖指数(23.4±1.8)较对照组(分别为5.4±0.7和10.8±2.4)明显增高(P<0.01);10-7mol/LAng(1~7)和AVP共同作用后S期百分率(8.5±0.7)和增殖指数(16.2±2.0)较AVP组降低,差异有统计学意义(P<0.01)。(3)AVP组CFs内CaN活性(0.27±0.02kU/mg)较对照组(0.12±0.01)kU/mg明显增加(P<0.01),给予10-9~10-6mol/LAng(1~7)和AVP共同干预后,CaN活性分别为0.25±0.01、0.20±0.02、0.17±0.01和0.15±0.02(kU/mg),均较AVP组降低,差异有统计学意义(P<0.01)。结论Ang(1~7)能抑制AVP诱导CFs增殖,CaN活性降低可能是其分子生物学机制之一。 相似文献
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96.
Hagai Yanai Albert Shteinberg Ziv Porat Arie Budovsky Alex Braiman Rolf Zeische Vadim E. Fraifeld 《Aging》2015,7(9):664-672
Idiopathic pulmonary fibrosis (IPF) is an age-related fatal disease with unknown etiology and no effective treatment. In this study, we show that primary cultures of fibroblasts derived from lung biopsies of IPF patients exhibited (i) accelerated replicative cellular senescence (CS); (ii) high resistance to oxidative-stress-induced cytotoxicity or CS; (iii) a CS-like morphology (even at the proliferative phase); and (iv) rapid accumulation of senescent cells expressing the myofibroblast marker α-SMA. Our findings suggest that CS could serve as a bridge connecting lung aging and its quite frequent outcome -- pulmonary fibrosis, and be an important player in the disease progression. Consequently, targeting senescent cells offers the potential of being a promising therapeutic approach. 相似文献
97.
Anke Ruedel Peter Dietrich Thomas Schubert Simone Hofmeister Claus Hellerbrand Anja Katrin Bosserhoff 《International journal of clinical and experimental pathology》2015,8(6):6607-6616
Activated synovial fibroblasts in rheumatoid arthritis (RASF) play a critical role in the pathology of rheumatoid arthritis (RA). Recent studies suggested that deregulation of microRNAs (miRs) affects the development and progression of RA. Therefore, we aimed to identify de-regulated miRs in RASF and to identify target genes that may contribute to the aggressive phenotype of RASF. Quantitative real-time PCR revealed a marked downregulation of miR-188-5p in synovial tissue samples of RA patients as well as in RASF. Exposure to the cytokine interleukine-1β lead to a further downregulation of miR-188-5p expression levels compared to control cells. Re-expression of miR-188-5p in RASF by transient transfection significantly inhibited cell migration. However, miR-188-5p re-expression had no effects on glycosaminoglycan degradation or expression of repellent factors, which have been previously shown to affect the invasive behavior of RASF. In search for target genes of miR-188-5p in RASF we performed gene expression profiling in RASF and found a strong regulatory effect of miR-188-5p on the hyaluronan binding protein KIAA1199 as well as collagens COL1A1 and COL12A1, which was confirmed by qRT-PCR. In silico analysis revealed that KIAA1199 carries a 3’UTR binding site for miR-188-5p. COL1A1 and COL12A1 showed no binding site in the mRNA region, suggesting an indirect regulation of these two genes by miR-188-5p. In summary, our study showed that miR-188-5p is down-regulated in RA in vitro and in vivo, most likely triggered by an inflammatory environment. MiR-188-5p expression is correlated to the activation state of RASF and inhibits migration of these cells. Furthermore, miR-188-5p is directly and indirectly regulating the expression of genes, which may play a role in extracellular matrix formation and destruction in RA. Herewith, this study identified potential novel therapeutic targets to inhibit the development and progression of RA. 相似文献
98.
Anke Ruedel Peter Dietrich Thomas Schubert Simone Hofmeister Claus Hellerbrand Anja-Katrin Bosserhoff 《International journal of clinical and experimental pathology》2015,8(5):4953-4962
Activated synovial fibroblasts in rheumatoid arthritis (RASF) play a critical role in the pathology of rheumatoid arthritis (RA). Recent studies suggested that deregulation of microRNAs (miRs) affects the development and progression of RA. Therefore, we aimed to identify de-regulated miRs in RASF and to identify target genes that may contribute to the aggressive phenotype of RASF. Quantitative real-time PCR revealed a marked downregulation of miR-188-5p in synovial tissue samples of RA patients as well as in RASF. Exposure to the cytokine interleukine-1β lead to a further downregulation of miR-188-5p expression levels compared to control cells. Re-expression of miR-188-5p in RASF by transient transfection significantly inhibited cell migration. However, miR-188-5p re-expression had no effects on glycosaminoglycan degradation or expression of repellent factors, which have been previously shown to affect the invasive behavior of RASF. In search for target genes of miR-188-5p in RASF we performed gene expression profiling in RASF and found a strong regulatory effect of miR-188-5p on the hyaluronan binding protein KIAA1199 as well as collagens COL1A1 and COL12A1, which was confirmed by qRT-PCR. In silico analysis revealed that KIAA1199 carries a 3’UTR binding site for miR-188-5p. COL1A1and COL12A1 showed no binding site in the mRNA region, suggesting an indirect regulation of these two genes by miR-188-5p. In summary, our study showed that miR-188-5p is down-regulated in RA in vitro and in vivo, most likely triggered by an inflammatory environment. MiR-188-5p expression is correlated to the activation state of RASF and inhibits migration of these cells. Furthermore, miR-188-5p is directly and indirectly regulating the expression of genes, which may play a role in extracellular matrix formation and destruction in RA. Herewith, this study identified potential novel therapeutic targets to inhibit the development and progression of RA. 相似文献
99.
Bruna Romana‐Souza Adriana P. Nascimento Patricia C. Brum Andréa Monte‐Alto‐Costa 《International journal of experimental pathology》2014,95(5):330-341
The α2‐adrenoceptors regulate the sympathetic nervous system, controlling presynaptic catecholamine release. However, the role of the α2‐adrenoceptors in cutaneous wound healing is poorly understood. Mice lacking both the α2A/α2C‐adrenoceptors were used to evaluate the participation of the α2‐adrenoceptor during cutaneous wound healing. A full‐thickness excisional lesion was performed on the dorsal skin of the α2A/α2C‐adrenoceptor knockout and wild‐type mice. Seven or fourteen days later, the animals were euthanized and the lesions were formalin‐fixed and paraffin‐embedded or frozen. Murine skin fibroblasts were also isolated from α2A/α2C‐adrenoceptor knockout and wild‐type mice, and fibroblast activity was evaluated. The in vivo study demonstrated that α2A/α2C‐adrenoceptor depletion accelerated wound contraction and re‐epithelialization. A reduction in the number of neutrophils and macrophages was observed in the α2A/α2C‐adrenoceptor knockout mice compared with wild‐type mice. In addition, α2A/α2C‐adrenoceptor depletion enhanced the levels of nitrite and hydroxyproline, and the protein expression of transforming growth factor‐β and vascular endothelial growth factor. Furthermore, α2A/α2C‐adrenoceptor depletion accelerated blood vessel formation and myofibroblast differentiation. The in vitro study demonstrated that skin fibroblasts isolated from α2A/α2C‐adrenoceptor knockout mice exhibited enhanced cell migration, α‐smooth muscle actin _protein expression and collagen deposition compared with wild‐type skin fibroblasts. In conclusion, α2A/α2C‐adrenoceptor deletion accelerates cutaneous wound healing in mice. 相似文献
100.