Abstract:
:These studies examined the effects of heat-inactivated horse serum, insulin, triiodothyronine (T3), and thyroxine (T4), individually and in combination, on collagen and proteoglycan synthesis by primary cell cultures of articular chondrocytes from immature male rabbits. Insulin concentrations of 25 to 100 ng/ml (4.4 to 17.4 x 10(-9) M) increasingly stimulated collagen and proteoglycan synthesis in the absence of serum. The effects of 25 ng/ml (4.4 x 10(-9) M) insulin or 15% heat-inactivated horse serum on collagen synthesis were similar. Triiodothyronine (10(-10) to 10(-6) M) and T4 (10(-8) to 10(-4) M) also stimulated collagen synthesis in the absence of serum, with peak effects at 10(-8) and 10(-6) M, respectively. Biphasic stimulation of proteoglycan synthesis was obtained with 10(-11) to 10(-7) MT3 (maximum at 10(-8) M) and 10(-8) to 10(-5) M T4 (maximum at 10(-7) M). In these experiments, triiodothyronine was 10 to 100 times more potent than T4 in stimulating cartilage matrix production. The cells retained their chondrocytic phenotype under hormonal stimulation, secreting almost exclusively Type II collagen and large, chondroitin sulfate-rich proteoglycans. The addition of insulin to maximally-stimulating concentrations of either T3 or T4 in serum-free medium further stimulated matrix synthesis, suggesting that these hormones modulate chondrocyte metabolism via multiple biosynthetic/receptor pathways.
journal_name
Connect Tissue Resjournal_title
Connective tissue researchauthors
Glade MJ,Kanwar YS,Stern PHdoi
10.3109/03008209409005633keywords:
subject
Has Abstractpub_date
1994-01-01 00:00:00pages
37-44issue
1eissn
0300-8207issn
1607-8438journal_volume
31pub_type
杂志文章abstract::Recently our laboratory has reported, in a lacerated flexor tendon model, that the "early turnover" phase of the repair process extends for a longer period of time in vivo than previously documented. The extensive turnover of the collagenous matrix was consistent with the presence of collagenolytic activity in repairi...
journal_title:Connective tissue research
pub_type: 杂志文章
doi:10.3109/03008208909103903
更新日期:1989-01-01 00:00:00
abstract::Although bone is a nanocomposite of mineral and collagen, mineral has been the more elusive component of study. A standard for bone mineral is clearly needed. We hypothesized that the most natural, least-processed bone mineral could be retrieved from the most highly mineralized bone. We therefore studied the rostrum o...
journal_title:Connective tissue research
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abstract:AIMS:The structural organization of collagen from mineralized tissues, such as dentin and bone, has been a topic of debate in the recent literature. Recent reports have presented novel interpretations of the complexity of collagen type I at different hierarchical levels and in different tissues. Here, we investigate th...
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doi:10.1080/03008207.2016.1235566
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abstract::The present study details structural aspects of the cells of the rat intra-articular disc (IAD) of the temporomandibular joint. At the light and electron microscope level, the outline of the cells varied, although a number appeared oval/rounded. Ultrastructurally, the cells contained moderate amounts of the intracellu...
journal_title:Connective tissue research
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abstract::We determined the feasibility of using scaffolds of adenoviral human BMP2 gene (AdBMP2)-modified human bone marrow mesenchymal stem cells (hBMSCs) and antigen-free bovine cancellous bone (BCB) to construct bone tissue. hMSCs were infected with AdBMP-2. Expression of BMP-2 and alkaline phosphatase confirmed successful ...
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journal_title:Connective tissue research
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更新日期:2005-01-01 00:00:00
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journal_title:Connective tissue research
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更新日期:1988-01-01 00:00:00
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更新日期:2006-01-01 00:00:00
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journal_title:Connective tissue research
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更新日期:2004-01-01 00:00:00
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journal_title:Connective tissue research
pub_type: 杂志文章
doi:10.3109/03008209809002438
更新日期:1998-01-01 00:00:00
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journal_title:Connective tissue research
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doi:10.3109/03008209509010825
更新日期:1995-01-01 00:00:00
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journal_title:Connective tissue research
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doi:
更新日期:2003-01-01 00:00:00
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journal_title:Connective tissue research
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更新日期:1991-01-01 00:00:00
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更新日期:2016-09-01 00:00:00
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journal_title:Connective tissue research
pub_type: 杂志文章
doi:
更新日期:2003-01-01 00:00:00
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journal_title:Connective tissue research
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doi:10.3109/03008209209016818
更新日期:1992-01-01 00:00:00
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journal_title:Connective tissue research
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doi:10.3109/03008208209008054
更新日期:1982-01-01 00:00:00
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journal_title:Connective tissue research
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doi:10.3109/03008208709002000
更新日期:1987-01-01 00:00:00
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journal_title:Connective tissue research
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更新日期:1990-01-01 00:00:00
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journal_title:Connective tissue research
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更新日期:1983-01-01 00:00:00
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journal_title:Connective tissue research
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更新日期:1996-01-01 00:00:00
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journal_title:Connective tissue research
pub_type: 杂志文章,评审
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更新日期:2008-01-01 00:00:00
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journal_title:Connective tissue research
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更新日期:2012-01-01 00:00:00
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journal_title:Connective tissue research
pub_type: 杂志文章
doi:10.3109/03008207809152274
更新日期:1978-01-01 00:00:00
abstract::We previously reported that circulating peripheral blood-borne cells (PBCs) contribute to early-phase meniscal reparative change. Because macrophages and myofibroblasts are important contributors of tissue regeneration, we examined their origin and distribution in the reparative meniscus. Reparative menisci were evalu...
journal_title:Connective tissue research
pub_type: 杂志文章
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更新日期:2017-11-01 00:00:00
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journal_title:Connective tissue research
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更新日期:1996-01-01 00:00:00
abstract::Of more than 2 million segmental bone defects repaired annually with bone autografts and allografts, 15-40% fail. Improving healing rates may be approached with tissue engineering and use of periosteum overlying an allograft. The present study documents gene expression in human periosteum-allograft constructs compared...
journal_title:Connective tissue research
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更新日期:2014-08-01 00:00:00
abstract::Idiopathic pulmonary fibrosis (IPF) is associated with aberrant repair, persistence of collagen deposition, and the development of vascular remodeling. However, the role of angiogenesis in the pathogenesis of IPF is still undetermined. The aim of this study was to evaluate the combined mRNA expression of vascular endo...
journal_title:Connective tissue research
pub_type: 杂志文章
doi:10.3109/03008200903056150
更新日期:2010-01-01 00:00:00