Expression of tight junction protein claudin-4 in Basal-Like breast carcinomas

Janina Kulka, Attila Marcell Szász, Zsuzsanna Németh, Lilla Madaras, Zsuzsa Schaff, István Arthur Molnár, Anna Mária Tokés

Research output: Contribution to journalArticle

48 Citations (Scopus)

Abstract

Claudins (CLDN) are tight junction proteins which contribute to the paracellular transport and ionic permeability of various epithelia. In recent years they came into focus for their suggested role in carcinogenesis and possible role in cancer therapy. According to our previous studies, in breast tissue CLDN4 is also related to the level of cellular differentiation. Thirty-eight estrogen (ER) and progesterone receptor (PgR) negative, HER2/neu negative, but cytokeratin 5/6 positive basal-like-mainly grade 3-breast carcinomas were compared with twenty-one grade 1, twenty-five grade 2 and twenty grade 3 non-basal-like invasive breast carcinomas, in respect to their CLDN4 expression. The immunohistochemical reactions were evaluated both semiquantitatively and by morphometrical analysis. Statistically significant difference (p∈=∈0.001) was observable regarding CLDN4 expression in the basal-like group as compared to grade 1 and 2 cancers. Further, CLDN4 expression was significantly higher (p∈=∈0.017) in the basal-like compared with the non-basal-like grade 3 carcinomas. Our results suggest that basal-like carcinomas are a subset of breast cancer with high level of CLDN4 protein expression. The finding is in accordance with our former observation that CLDN4 is indeed related to cellular differentiation. This observation may be seen as a further proof that basal-like carcinomas represent a separable group amongst grade 3 breast carcinomas.

Original languageEnglish
Pages (from-to)59-64
Number of pages6
JournalPathology and Oncology Research
Volume15
Issue number1
DOIs
Publication statusPublished - Mar 2009

Fingerprint

Claudin-4
Tight Junction Proteins
Breast Neoplasms
Carcinoma
Keratin-6
Claudins
Keratin-5
Progesterone Receptors
Estrogen Receptors
Permeability
Neoplasms
Carcinogenesis
Breast
Epithelium
Proteins

Keywords

  • Basal-like
  • Breast carcinoma
  • Claudin-4
  • Immunohistochemistry
  • Tissue microarray

ASJC Scopus subject areas

  • Cancer Research
  • Oncology
  • Pathology and Forensic Medicine

Cite this

Expression of tight junction protein claudin-4 in Basal-Like breast carcinomas. / Kulka, Janina; Szász, Attila Marcell; Németh, Zsuzsanna; Madaras, Lilla; Schaff, Zsuzsa; Molnár, István Arthur; Tokés, Anna Mária.

In: Pathology and Oncology Research, Vol. 15, No. 1, 03.2009, p. 59-64.

Research output: Contribution to journalArticle

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