Glucan HBP-A increase type II collagen expression of chondrocytes in vitro and tissue engineered cartilage in vivo / 中国结合医学杂志
Chinese journal of integrative medicine
; (12): 196-203, 2015.
Article
in En
| WPRIM
| ID: wpr-267234
Responsible library:
WPRO
ABSTRACT
<p><b>OBJECTIVE</b>Although chondroprotective activities have been documented for polysaccharides, the potential target of different polysaccharide may differ. The study was aimed to explore the effect of glucan HBP-A in chondrocyte monolayer culture and chondrocytes-alginate hydrogel constructs in vivo, especially on the expression of type II collagen.</p><p><b>METHODS</b>Chondrocytes isolated from rabbit articular cartilage were cultured and verified by immunocytochemical staining of type II collagen. Chondrocyte viability was assessed after being treated with HBP-A in different concentrations. Morphological status of chondrocytes-alginate hydrogel constructs in vitro was observed by scanning electron microscope (SEM). The constructs were treated with HBP-A and then injected to nude mice subcutaneously. Six weeks after transplantation, the specimens were observed through transmission electron microscopy (TEM). The mRNA expressions of disintegrin and metalloproteinase with thrombospondin motifs 5 (ADAMTs-5), aggrecan and type II collagen in both monolayer culture and constructs were determined by real time polymerase chain reaction (PCR). The expression of type II collagen and matrix metalloproteinases-3 (MMP-3) in chondrocyte monolayer culture was also tested through Western blot and enzyme linked immunosorbent assay (ELISA), respectively.</p><p><b>RESULTS</b>MMP-3 secretion and ADAMTs-5 mRNA expression in vitro were inhibited by HBP-A at 0.3 mg/mL concentration. In morphological study, there were significant appearance of collagen in those constructs treated by HBP-A. Accordingly, in both chondrocyte monolayer culture and chondrocytes-alginate hydrogel constructs, the expression of type II collagen was increased significantly in HBP-A group when compared with control group (P<0.001).</p><p><b>CONCLUSIONS</b>The study documented that the potential pharmacological target of glucan HBP-A in chondrocytes monolayer culture and tissue engineered cartilage in vivo may be concerned with the inhibition of catabolic enzymes MMP-3, ADAMTs-5, and increasing of type II collagen expression.</p>
Full text:
1
Index:
WPRIM
Main subject:
Pharmacology
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Physiology
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RNA, Messenger
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Immunohistochemistry
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Cartilage, Articular
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Cell Survival
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Matrix Metalloproteinase 3
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Chondrocytes
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Hydrogel, Polyethylene Glycol Dimethacrylate
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Glucuronic Acid
Limits:
Animals
Language:
En
Journal:
Chinese journal of integrative medicine
Year:
2015
Type:
Article