In  vitro characteristics of Tenon's fibroblast lines derived from pediatric and adult eyes do not fully explain pediatric XXXX : a  preliminary report.

@entity1 @entity720 @entity726 @entity1487
PURPOSE: To compare the in  vitro characteristics of Tenon's capsule fibroblasts from @entity1 and adults that may be relevant to filtration surgery success. METHODS: Fibroblast cell lines derived from 5 young (median @entity1 age, 2.4  years) and 7 old (median @entity1 age, 71 years) discarded Tenon's capsule surgical specimens were used at early passage (P2-P3). Fibroblasts were plated at "high" (10(4)cells/cm(2)) or "low" density (10(3)cells/cm(2)) and harvested at days 0-14, for growth curve and doubling time comparisons. Migration was measured using a wound model (confluent monolayers    @entity1487 [ @entity1487 ] over 1-96 hours). Collagen synthesis was measured as secreted @entity720 /24 hours from confluent monolayers. RESULTS: At low density, "young" fibroblasts achieved higher cell numbers at confluence (day 14) compared with "old": 158    35 versus 105    12 * 10(3)cells/cm(2) (P = 0.0034). Mean doubling time for young versus old was similar at low density plating: 20.95    1.55 versus 22.37    2.09 hours (P = 0.26). It was shorter, however, for young versus old at high-density plating: 42.11    6.01 versus 54.26    4.24 hours (P = 0.0051). Wound closure rates were similar for young versus old cells (4 lines for each group) with and without @entity1487 . Collagen synthesis was similar for young and old (4 lines for each group). CONCLUSIONS: Although young fibroblasts reached higher density than old at confluence and had shorter doubling times at high-density plating, wound closure/migration and collagen synthesis rates were similar. Despite the preliminary nature of this study (few specimens, limited cell features explored), factors besides those intrinsic to the fibroblasts themselves likely mediate the more rapid healing/scarring after @entity726 filtration surgery in @entity1 .
