DPP-4 capillary invasion mediated by VEGF is an important mechanism

Ntiate to hypertrophic DPP-4 chondrocytes: a change that is characterized by changes in gene expression profile and Ver by an increase in cell volume. Proliferation and hypertrophy of chondrocytes, along the synthesis of ECM, are the main St Strengths of endochondral bone growth. Hypertrophic chondrocytes mineralize their ECM and apoptosis or autophagy, and the zone of hypertrophic cartilage cells with shore Knochenvorl Is through blood vessels E penetrated. The capillary invasion mediated by VEGF is an important mechanism for coupling states of chondrogenesis and osteogenesis, which determines the rate of bone growth and is essential for bone formation. Each Ver Induce change this balance nnte k Pathological states ends, As indicated by the big number of detected e human chondrodysplasias and transgenic M Mice. VEGF production by hypertrophic chondrocytes is regulated by hypoxia and hypoxia-inducible factor by 1. HIF is a key regulator of the hypoxic response, as the growth arrest of chondrocyte survival, maturation and apoptosis mediates essential for chondrogenesis and oxygen that Ver changes In glucose uptake increased ht Be dependent Ngig production of red blood rperchen, and the formation of new blood vessels e by angiogenesis. HIF is a one of the major proteins Of customers heat shock protein 90, and it is necessary for the operation and the rapid hypoxic stabilization of HIF-1, which is otherwise by the proteasome system of ubiquitin. Hsp90 is involved in angiogenesis by influencing the receptor system of the VEGF / VEGF at different levels and several inhibitors of HSP90 activity t, evaluated in clinical trials as anti-angiogenesis factors.
A modulation of HIF-activity t is strongly dependent Ngig of HSP90 inhibitor concentration. Erh Hte levels of HIF-1 protein and the expression of HIF target gene, such as VEGF has been in the low nanomolar range in front, w While h Efficient cans here, the negative regulation of HIF. Compared to the S Mammal growth plate, it avian much l singer columns of chondrocytes contains Lt, the cells are more in each area and blood vessels E penetrate deep into the Irinotecan Metaphys Ren growth plate, which makes the avian growth plate much more vascular Ren as the ugetieren of S. Although it was observed to an oxygen atom gradient in the growth zone of chicks, no hypoxia was detected, and the status of oxygen to the cells in the cartilage was in accordance with their oxygen demand. Thiram-induced tibial dyschondroplasia-and vitamin D deficiency rickets are disorders of the avian bone growth plates and enhanced unvascularized and marked lameness. The first is the result of copper deficiency, the other was the result of the reduced serum calcium and phosphorus in the absence of vitamin D. dyschondroplasia the abnormal differentiation of chondrocytes, supply changes In the expression of genes for VEGF signaling and the development of matrix metalloproteinase T assigned ACTION. In this study, the relationship between Hsp90, hypoxia and angiogenesis in the growth plate of chicks was evaluated. Two changes were used St Of growth plate from different Tiologien with different status and hypoxia, but both showed a significant reduction of blood supply. By inhibiting the activity of HSP90-t, and evaluation of in situ chondrocyte.

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