scholarly journals Effect of Melatonin on the Proliferation and Differentiation of Chondrocytes from Rat Vertebral Body Growth Plate In Vitro

2013 ◽  
Vol 10 (10) ◽  
pp. 1392-1398 ◽  
Author(s):  
Zhao-Ming Zhong ◽  
Tao Li ◽  
Zi-Xing Xu ◽  
Ting-Ting Meng ◽  
Ji-Huan Zeng ◽  
...  
2005 ◽  
Vol 139 (6) ◽  
pp. 738-740 ◽  
Author(s):  
T. V. Rusova ◽  
V. I. Rykova ◽  
A. V. Korel’ ◽  
A. M. Zaidman ◽  
D. S. Tkachev

2006 ◽  
Vol 191 (1) ◽  
pp. 221-228 ◽  
Author(s):  
Bénédicte Rabier ◽  
Allan J Williams ◽  
Frederic Mallein-Gerin ◽  
Graham R Williams ◽  
O Chassande

The active thyroid hormone, triiodothyronine (T3), binds to thyroid hormone receptors (TR) and plays an essential role in the control of chondrocyte proliferation and differentiation. Hypo- and hyperthyroidism alter the structure of growth plate cartilage and modify chondrocyte gene expression in vivo, whilst TR mutations or deletions in mice result in altered growth plate architecture. Nevertheless, the particular roles of individual TR isoforms in mediating T3 action in chondrocytes have not been studied and are difficult to determine in vivo because of complex cellular and molecular interactions that regulate growth plate maturation. Therefore, we studied the effects of TRα and TRβ on chondrocyte growth and differentiation in primary cultures of neonatal rib chondrocytes isolated from TRα- and TRβ-deficient mice. T3 decreased proliferation but accelerated differentiation of rib chondrocytes from wild-type mice. T3 treatment resulted in similar effects in TRα-deficient chondrocytes, but in TRβ-deficient chondrocytes, all T3 responses were abrogated. Furthermore, T3 increased TRβ1 expression in wild-type and TRα-deficient chondrocytes. These data indicate that T3-stimulated differentiation of primary rib chondrocytes in vitro requires TRβ and suggest that the TRβ1 isoform mediates important T3 actions in mouse rib chondrocytes.


2009 ◽  
Vol 187 (5) ◽  
pp. 685-699 ◽  
Author(s):  
Ellen Bellon ◽  
Frank P. Luyten ◽  
Przemko Tylzanowski

Indian hedgehog (Ihh) regulates proliferation and differentiation of chondrocytes in the growth plate. Although the biology of Ihh is currently well documented, its transcriptional regulation is poorly understood. δ-EF1 is a two-handed zinc finger/homeodomain transcriptional repressor. Targeted inactivation of mouse δ-EF1 leads to skeletal abnormalities including disorganized growth plates, shortening of long bones, and joint fusions, which are reminiscent of defects associated with deregulation of Ihh signaling. Here, we show that the absence of δ-EF1 results in delayed hypertrophic differentiation of chondrocytes and increased cell proliferation in the growth plate. Further, we demonstrate that δ-EF1 binds to the putative regulatory elements in intron 1 of Ihh in vitro and in vivo, resulting in down-regulation of Ihh expression. Finally, we show that δ-EF1 haploinsufficiency leads to a postnatal increase in trabecular bone mass associated with enhanced Ihh expression. In summary, we have identified δ-EF1 as an in vivo negative regulator of Ihh expression in the growth plate.


2020 ◽  
Vol 17 (3) ◽  
pp. 117-133
Author(s):  
A. M. Zaidman

It is with gratitude that I dedicate my work to the teacher, Ya.L. Tsivyan, who not only provided a subject for research, but also, on his own example of a person devoted to his work, brought up a generation of scholars for whom life and science are inseparable.The paper presents the results of many years of research on idiopathic scoliosis in the form of a report to the teacher. Several fundamental topics were considered:1) for the first time in world practice, it was established, on the basis of a study of 50 patients with idiopathic scoliosis, that the etiological factor of scoliosis is ectopic localization of neural crest derivatives, which are not genetically determined to chondrogenic differentiation and the growth process, in the vertebral body growth plate;2) a local disturbance of chondrogenesis in the  vertebral body growth plate  is the cause of the growth asymmetry and formation of spinal deformity in idiopathic scoliosis;3) the degree of structural changes in the spine and the prognosis of the deformity progression  depend on the level of disturbance of the morphogenetic processes in the vertebral body growth plate embedded in embryogenesis;4) it is supposed to confirm the proposed hypotheses by inhibition of the PAX3 gene in the chick embryo model of idiopathic scoliosis and to get answers to many more unclear questions concerning scoliotic disease.


Scoliosis ◽  
2008 ◽  
Vol 3 (1) ◽  
Author(s):  
Gregory Day ◽  
Kieran Frawley ◽  
Gael Phillips ◽  
I Bruce McPhee ◽  
Robert Labrom ◽  
...  

2009 ◽  
Vol 610-613 ◽  
pp. 1070-1075
Author(s):  
Li Yu ◽  
Ming Qiao Tang ◽  
Wei Qun Yan

Objective:To observe the effect of human platelet extracts on proliferation and differentiation of rabbit growth-plate chondrocytes in monolayer and fabrication of tissue engineering cartilage in vitro. Method: To determine the effects of platelet extracts at different concentrations on proliferation and differentiation of rabbit growth-plate chondrocytes using 3H-TdR、PNP and HE staining. Results: Platelet extracts had very strong stimulative effects on proliferation and differentiation of chondrocytes, especially the hypertropization (termination) of chondrocytes.


2011 ◽  
Vol 38 (10) ◽  
pp. 967-974
Author(s):  
Jian ZHOU ◽  
Hui-Ping MA ◽  
Ke-Ming CHEN ◽  
Bao-Feng GE ◽  
Guo-Zheng CHENG ◽  
...  

2015 ◽  
Vol 05 (999) ◽  
pp. 1-1
Author(s):  
Abu Bakar Mohd Hilmi ◽  
Mohd Noor Norhayati ◽  
Ahmad Sukari Halim ◽  
Chin Keong Lim ◽  
Zulkifli Mustafa ◽  
...  

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