New insights in collagen turnover in orofacial cleft patients.

Abstract:

OBJECTIVE:We aimed to characterize the fibroblast phenotype of patients by analyzing gene and protein expression of cleft lip and/or cleft palate fibroblasts in relation to collagen turnover and extracellular matrix remodeling. PATIENTS:Human palatal fibroblasts were obtained from three healthy subjects without cleft lip and/or cleft palate and from three subjects with nonsyndromic cleft lip and/or cleft palate. Collagen turnover-related gene and protein expression were analyzed by real-time polymerase chain reaction, Western and dot blots, and sodium dodecyl sulfate zymography. RESULTS:Cleft lip and/or cleft palate fibroblasts, compared with controls, displayed a down-regulation of collagens type I and III messenger RNA (p < .0001 and p < .001, respectively) but an opposite tendency to increase protein levels. Cleft lip and/or cleft palate cells had higher lysyl hydroxylase-2b messenger RNA levels expressed in relation to collagen type I messenger RNA, down-regulated matrix metalloproteinase-1, tissue inhibitor of matrix metalloproteinase-1, and Secreted Protein Acidic and Rich in Cysteine messenger RNA (p < .0001 and p < .01, respectively). Pro-matrix metalloproteinase-1 tended to decrease, and pro-matrix metalloproteinase-2 and -9 were down-regulated (p < .01, p < .05, respectively), as was Secreted Protein Acidic and Rich in Cysteine protein expression (p < .05). CONCLUSIONS:Our results suggest that the cleft lip and/or cleft palate fibroblast phenotype is characterized by a tendency toward interstitial collagen deposition due to posttranslational modifications, such as decreased collagen degradation by matrix metalloproteinases and increased collagen cross-links. These findings may contribute to the knowledge of the cleft lip and/or cleft palate fibroblast phenotype and may be useful to the surgeon when considering the potential wound contraction and subsequent undesired scarring in cleft lip and/or cleft palate ocurring after the surgical closure of a cleft palate.

authors

Gagliano N,Carinci F,Moscheni C,Torri C,Pezzetti F,Scapoli L,Martinelli M,Gioia M,Stabellini G

doi

10.1597/07-196.1

subject

Has Abstract

pub_date

2010-07-01 00:00:00

pages

393-9

issue

4

eissn

1055-6656

issn

1545-1569

journal_volume

47

pub_type

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