Localization of hyaluronan in regions of the human female reproductive tract.

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Abstract
Accumulation of hyaluronan has previously been observed in various organs as an inflammatory response. To study the presumed connection between infertility due to a tubal factor and inflammation, we performed an analysis of the hyaluronan distribution in biopsy specimens from the female reproductive tract, using a biotinylated hyaluronan binding protein (HABP) as a histochemical probe. In normal specimens hyaluronan was localized in the dense, irregular connective tissue surrounding blood vessels of various sizes. Smooth muscle and columnar epithelium were devoid of hyaluronan. The isthmic part of the normal Fallopian tube showed moderately intense staining of the entire lamina propria, whereas normal fimbriae stained weakly. No cyclic changes in hyaluronan content were observed. In biopsy specimens from women with infertility due to a tubal factor, intense staining, stronger than in normal tubes, was detected in the adhesions and in the lamina propria of sactosalpinx. This may indicate that infertility due to a tubal factor is associated with an ongoing inflammatory and/or proliferative process.

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