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Collagen Hydrolysate Intake Increases Skin Collagen Expression and Suppresses Matrix Metalloproteinase 2 Activity.
MedLine Citation:
PMID:  21480801     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Abstract The effect of daily ingestion of collagen hydrolysate (CH) on skin extracellular matrix proteins was investigated. Four-week-old male Wistar rats were fed a modified AIN-93 diet containing 12% casein as the reference group or CH as the treatment group. A control group was established in which animals were fed a non-protein-modified AIN-93 diet. The diets were administered continuously for 4 weeks when six fresh skin samples from each group were assembled and subjected to extraction of protein. Type I and IV collagens were studied by immunoblot, and activities of matrix metalloproteinase (MMP) 2 and 9 were assessed by zymography. The relative amount of type I and IV collagens was significantly (P < .05) increased after CH intake compared with the reference diet group (casein). Moreover, CH uptake significantly decreased both proenzyme and active forms of MMP2 compared with casein and control groups (P < .05). In contrast, CH ingestion did not influence on MMP9 activity. These results suggest that CH may reduce aging-related changes of the extracellular matrix by stimulating anabolic processes in skin tissue.
Authors:
Vivian Zague; Vanessa de Freitas; Marina da Costa Rosa; Geórgia Álvares de Castro; Ruy G Jaeger; Gláucia M Machado-Santelli
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-4-11
Journal Detail:
Title:  Journal of medicinal food     Volume:  -     ISSN:  1557-7600     ISO Abbreviation:  -     Publication Date:  2011 Apr 
Date Detail:
Created Date:  2011-4-12     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9812512     Medline TA:  J Med Food     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
1 Department of Cell and Developmental Biology, Institute of Biomedical Sciences, University of São Paulo , São Paulo, Brazil.
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