Laminin N-terminus α31 is upregulated in invasive ductal breast cancer and changes the mode of tumour invasion.
Laminin N-terminus α31 (LaNt α31) is an alternative splice isoform derived from the laminin α3 gene. The LaNt α31 protein is enriched around the terminal duct lobular units in normal breast tissue. In the skin and cornea the protein influences epithelial cell migration and tissue remodelling. Howeve...
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Public Library of Science (PLoS)
2022-01-01
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| Series: | PLoS ONE |
| Online Access: | https://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0264430&type=printable |
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| author | Lee D Troughton Danielle A O'Loughlin Tobias Zech Kevin J Hamill |
| author_facet | Lee D Troughton Danielle A O'Loughlin Tobias Zech Kevin J Hamill |
| author_sort | Lee D Troughton |
| collection | DOAJ |
| description | Laminin N-terminus α31 (LaNt α31) is an alternative splice isoform derived from the laminin α3 gene. The LaNt α31 protein is enriched around the terminal duct lobular units in normal breast tissue. In the skin and cornea the protein influences epithelial cell migration and tissue remodelling. However, LaNt α31 has never been investigated in a tumour environment. Here we analysed LaNt α31 in invasive ductal carcinoma and determined its contribution to breast carcinoma invasion. LaNt α31 expression and distribution were analysed by immunohistochemistry in human breast tissue biopsy sections and tissue microarrays covering 232 breast cancer samples. This analysis revealed LaNt α31 to be upregulated in 56% of invasive ductal carcinoma specimens compared with matched normal tissue, and further increased in nodal metastasis compared with the tumour mass in 45% of samples. 65.8% of triple negative cases displayed medium to high LaNt α31 expression. To study LaNt α31 function, an adenoviral system was used to induce expression in MCF-7 and MDA-MB-231 cells. 2D cell migration and invasion into collagen hydrogels were not significantly different between LaNt α31 overexpressing cells and control treated cells. However, LaNt α31 overexpression reduced the proliferation rate of MCF-7 and MDA-MB-231 cells. Moreover, LaNt α31 overexpressing MDA-MB-231 cells displayed a striking change in their mode of invasion into laminin-containing Matrigel; changing from multicellular streaming to individual cellular-invasion. In agreement with these results, 66.7% of the tumours with the highest LaNt α31 expression were non-cohesive. Together these findings indicate that breast cancer-associated changes in LaNt α31 expression could contribute to the processes involved in tumour invasion and may represent a new therapeutic target. |
| format | Article |
| id | doaj-art-b25a4efec85b4a7593c2e4db6f2f9ea1 |
| institution | Kabale University |
| issn | 1932-6203 |
| language | English |
| publishDate | 2022-01-01 |
| publisher | Public Library of Science (PLoS) |
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| series | PLoS ONE |
| spelling | doaj-art-b25a4efec85b4a7593c2e4db6f2f9ea12025-08-20T03:46:21ZengPublic Library of Science (PLoS)PLoS ONE1932-62032022-01-01173e026443010.1371/journal.pone.0264430Laminin N-terminus α31 is upregulated in invasive ductal breast cancer and changes the mode of tumour invasion.Lee D TroughtonDanielle A O'LoughlinTobias ZechKevin J HamillLaminin N-terminus α31 (LaNt α31) is an alternative splice isoform derived from the laminin α3 gene. The LaNt α31 protein is enriched around the terminal duct lobular units in normal breast tissue. In the skin and cornea the protein influences epithelial cell migration and tissue remodelling. However, LaNt α31 has never been investigated in a tumour environment. Here we analysed LaNt α31 in invasive ductal carcinoma and determined its contribution to breast carcinoma invasion. LaNt α31 expression and distribution were analysed by immunohistochemistry in human breast tissue biopsy sections and tissue microarrays covering 232 breast cancer samples. This analysis revealed LaNt α31 to be upregulated in 56% of invasive ductal carcinoma specimens compared with matched normal tissue, and further increased in nodal metastasis compared with the tumour mass in 45% of samples. 65.8% of triple negative cases displayed medium to high LaNt α31 expression. To study LaNt α31 function, an adenoviral system was used to induce expression in MCF-7 and MDA-MB-231 cells. 2D cell migration and invasion into collagen hydrogels were not significantly different between LaNt α31 overexpressing cells and control treated cells. However, LaNt α31 overexpression reduced the proliferation rate of MCF-7 and MDA-MB-231 cells. Moreover, LaNt α31 overexpressing MDA-MB-231 cells displayed a striking change in their mode of invasion into laminin-containing Matrigel; changing from multicellular streaming to individual cellular-invasion. In agreement with these results, 66.7% of the tumours with the highest LaNt α31 expression were non-cohesive. Together these findings indicate that breast cancer-associated changes in LaNt α31 expression could contribute to the processes involved in tumour invasion and may represent a new therapeutic target.https://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0264430&type=printable |
| spellingShingle | Lee D Troughton Danielle A O'Loughlin Tobias Zech Kevin J Hamill Laminin N-terminus α31 is upregulated in invasive ductal breast cancer and changes the mode of tumour invasion. PLoS ONE |
| title | Laminin N-terminus α31 is upregulated in invasive ductal breast cancer and changes the mode of tumour invasion. |
| title_full | Laminin N-terminus α31 is upregulated in invasive ductal breast cancer and changes the mode of tumour invasion. |
| title_fullStr | Laminin N-terminus α31 is upregulated in invasive ductal breast cancer and changes the mode of tumour invasion. |
| title_full_unstemmed | Laminin N-terminus α31 is upregulated in invasive ductal breast cancer and changes the mode of tumour invasion. |
| title_short | Laminin N-terminus α31 is upregulated in invasive ductal breast cancer and changes the mode of tumour invasion. |
| title_sort | laminin n terminus α31 is upregulated in invasive ductal breast cancer and changes the mode of tumour invasion |
| url | https://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0264430&type=printable |
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