Complex sentence: This in particular applies to keratinocytes while fibroblasts are not addressed in this way, apart from cell growth and differentiation While S1P suppresses epidermal proliferation as the glucocorticoids do, it differs from them in so far, as proliferation of dermal fibroblasts is not reduced.
Split into simpler sentences: This in particular applies to keratinocytes while fibroblasts are not addressed in this way. Apart from cell growth and differentiation While S1P suppresses epidermal proliferation as the glucocorticoids do it differs from them in so far as proliferation of dermal fibroblasts is not reduced.