Figure 4From: Human meniscus cells express hypoxia inducible factor-1α and increased SOX9 in response to low oxygen tension in cell aggregate cultureCollagen P4Hα(I) gene expression in meniscus cell aggregates. Prolyl 4-hydroxylase (P4H)α(I) gene expression in (a) outer meniscus cell aggregates (n = 4) and (b) inner meniscus cell aggregates (n = 4) in 5% oxygen versus 20% oxygen. Data are expressed as mean ± standard deviation (n = 3). **P < 0.01 (by Student's unpaired t-test).Back to article page