Fig. 1From: The protective effects of PI3K/Akt pathway on human nucleus pulposus mesenchymal stem cells against hypoxia and nutrition deficiencyPrimary hNP-MSCs present short spindle-shape (a). P2 hNP-MSCs presented the characteristic spindle-shape and grew in spiral formation (b). These cells were highly positive for CD73, CD90, CD105, and negative for CD34, CD45, HLA-DR (c, d). hNP-MSCs possessed osteogenic, adipogenic, and chondrogenic differentiation (e)Back to article page