Cotransfected human chondrocytes: over-expression of IGF-I and SOX9 enhances the synthesis of cartilage matrix components collagen-II and glycosaminoglycans
Braz. j. med. biol. res
;
48(12): 1063-1070, Dec. 2015. tab, graf
Article
Dans Anglais
| LILACS
| ID: lil-762916
ABSTRACT
Damage to cartilage causes a loss of type II collagen (Col-II) and glycosaminoglycans (GAG). To restore the original cartilage architecture, cell factors that stimulate Col-II and GAG production are needed. Insulin-like growth factor I (IGF-I) and transcription factor SOX9are essential for the synthesis of cartilage matrix, chondrocyte proliferation, and phenotype maintenance. We evaluated the combined effect of IGF-I and SOX9 transgene expression on Col-II and GAG production by cultured human articular chondrocytes. Transient transfection and cotransfection were performed using two mammalian expression plasmids (pCMV-SPORT6), one for each transgene. At day 9 post-transfection, the chondrocytes that were over-expressing IGF-I/SOX9 showed 2-fold increased mRNA expression of the Col-II gene, as well as a 57% increase in Col-II protein, whereas type I collagen expression (Col-I) was decreased by 59.3% compared with controls. The production of GAG by these cells increased significantly compared with the controls at day 9 (3.3- vs 1.8-times, an increase of almost 83%). Thus, IGF-I/SOX9 cotransfected chondrocytes may be useful for cell-based articular cartilage therapies.
Texte intégral:
Disponible
Indice:
LILAS (Amériques)
Sujet Principal:
Facteur de croissance IGF-I
/
Transfection
/
Chondrocytes
/
Collagène de type II
/
Facteur de transcription SOX-9
/
Matrilines
/
Glycosaminoglycanes
Limites du sujet:
Humains
langue:
Anglais
Texte intégral:
Braz. j. med. biol. res
Thème du journal:
Biologie
/
Médicament
Année:
2015
Type:
Article
Pays d'affiliation:
Mexique
Institution/Pays d'affiliation:
Autonomous University of Nuevo León/MX
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