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Rouxs Arch Dev Biol. 1993 Feb;202(3):132-143. doi: 10.1007/BF00365303.

Localisation of acidic and basic fibroblast growth factors during mouse palate development and their effects on mouse palate mesenchyme cells in vitro.

Roux's archives of developmental biology : the official organ of the EDBO

P M Sharpe, C L Brunet, D M Foreman, M W J Ferguson

Affiliations

  1. Animal and Human Reproduction, Development and Growth Research Group, Department of Cell and Structural Biology, University of Manchester, Stopford Building, Oxford Road, M13 9PT, Manchester, England.

PMID: 28305990 DOI: 10.1007/BF00365303

Abstract

The distribution of acidic and basic fibroblast growth factors (aFGF, bFGF) was mapped during mouse embryonic palate development. Generally, they localised most intensely in the basement membrane and epithelia rather than the mesenchyme. Localisation was predominantly restricted to the palatal nasal, and medial edge epithelia. Staining was particularly intense in the medial edge epithelia at the time of mid-line epithelial seam formation. Intense staining persisted in the epithelia of the degenerating seam and later in the oral and nasal epithelial triangles. Mouse embryonic palate mesenchyme (MEPM) cells cultured in vitro on a variety of substrata (on plastic, on the surface of a collagen gel and within a collagen gel) responded to treatment with aFGF or bFGF. These responses were modulated by the culture substratum. The FGFs stimulated MEPM cell proliferation on plastic and on collagen, but inhibited cell growth in collagen. The FGFs had little effect on protein production when cells were cultured on plastic, but caused a large reduction in on-collagen and incollagen cultures. This reduction was greater in collagenous than non-collagenous proteins. Generally, treatment with FGFs stimulated the production of glycosaminoglycans (GAGs), particularly hyaluronan (HA) and dermatan sulphate (DS). In addition, the size class of HA was shifted to a higher molecular weight form. These data indicate that aFGF and bFGF may play a role in modulating mesenchymal cell matrix biosynthesis, so facilitating palatal epithelial seam degeneration.

Keywords: Extracellular matrix; Growth factors; Palate development; aFGF; bFGF

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