<i>TGFB1</i> mRNA expression was significantly increased in the peritoneum adjacent to endometriosis lesions compared to peritoneum distal to lesions in women with endometriosis (B).

<p>There was no signifianct difference in TGFB1 expression between women with and without endometriosis, nor was there a difference in expression between control and prone sites of peritoneum in women without endometriosis. There is no significant change in mRNA expression for <i>TGFBR1, TGFBR2</i> and <i>SMAD3</i> in all comparisons made (A, C–L). <i>n = 35 (*p<0.05).</i></p

Primers used for qRT-PCR including primer sequence.

<p>All primers were pre-validated and supplied by Primer Design.</p><p>Primers used for qRT-PCR including primer sequence.</p

Venn diagram displaying significant changes in gene expression of TGF-β signalling target in the 3 comparisons made between women with and without endometriosis.

<p>Venn diagram displaying significant changes in gene expression of TGF-β signalling target in the 3 comparisons made between women with and without endometriosis.</p

All TGF-β ligands are expressed in peritoneal fluid from women with and without endometriosis.

<p>TGF-β1 was significantly increased in peritoneal fluid from women with endometriosis compared to women without. Levels of TGF-β2 do not change between women with and without endometriosis. TGF-β3 levels appear to increase in women with endometriosis however this is not a significant change. Cultured HPMCs secreted TGF-β1 protein in-vitro. <i>n = 12 peritoneal fluid, n = 3 HMPC (*p<0.05).</i></p

TGF-β1, TGF-βR1, TGF-βR2, and pSmad 2/3, are localized to the mesothelial cells of the peritoneum of women without endometriosis at contol sites and prone sites.

<p>TGF-β1, TGF-βR1, TGF-βR2, and pSmad 2/3, are localized to the mesothelial cells of the peritoneum of with endometriosis at sites disteal and ajacent to endometriosis lesions. No staining was observed in the negative control sections. <i>n = 8.</i></p

Table displays gene expression including fold change and p value of TGF-β signalling target genes in peritoneal biopsies from women with endometriosis at sites ajacent compared to sites distal to endometriosis lesions.

<p><i>n = 6.</i></p><p>Table displays gene expression including fold change and p value of TGF-β signalling target genes in peritoneal biopsies from women with endometriosis at sites ajacent compared to sites distal to endometriosis lesions.</p