Effects of secreted protein acidic and rich in cysteine peptide on change of ultramicrostructure and extracellular matrix secretion of human mesangial cells cultured in vitro / 第二军医大学学报
Academic Journal of Second Military Medical University
;
(12): 36-39, 2010.
Artigo
em Chinês
| WPRIM
| ID: wpr-841220
ABSTRACT
Objective:
To investigate the effects of secreted protein acidic and rich in cysteine (SPARC) peptide on ultramicrostructure and extracellular matrix secretion of human mesangial cells cultured in vitro.Methods:
Human mesangial cells (HMC) were incubated at the presence of SPARC peptide (50 μg/ml)for 48 h and 96 h separately; HMC cultured without SPARC peptide was taken as control. The cell ultramicrostructure was observed by transmission electron microscope. Real-time fluorescent quantitative PCR (RT-PCR) was used to detect mRNA levels of collagen type I (Col I), collagen type IV (Col IV), fibronectin (FN), and laminin (LN) 96 hours after culture, and the results were compared between the 2 groups. The secreted levels of Col I, Col IV, FN, and LN protein were measured and compared by enzyme-linked immunosorbent assay (ELISA) in the 2 groups.Results:
There was no obvious change in HMC in the control group. After cultured for 48 hours, a few HMC in experimental group showed initial appearance of apoptosis; after cultured for 96 h, a great number of HMC had a typical apoptotic appearance and there were typical apoptotic bodies under electron microscope. RT-PCR showed that, compared with the control group, the experimental group had significantly decreased levels of Col I, Col IV and FN mRNA (P<0.05, P<0.0l); ELISA results showed that the secretions of Col I, ColIV, and FN protein in the experimental group were greatly lower than those in the control garoup (P<.05, P<0.01).Conclusion:
SPARC peptide can effectively induce apoptosis of human mesangial cells and down regulate the secretion of extracellular matrix in vitro.
Texto completo:
DisponíveL
Índice:
WPRIM (Pacífico Ocidental)
Idioma:
Chinês
Revista:
Academic Journal of Second Military Medical University
Ano de publicação:
2010
Tipo de documento:
Artigo
Similares
MEDLINE
...
LILACS
LIS