level of estrogen receptor α and β expression and coexpression in non-small cell lung cancer tissue


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Abstract

Objectives. Quantitative assessment of the expression and co-expression levels of estrogen receptors of different types (ERα and ERβ) in malignant tissues of large cohort of patients with non-small cell lung cancer (NSCLC).

Materials and methods. Measurement of ERα and ERβ expression levels was carried out on 167 malignant tissue samples by immunofluorescence flow cytometric method. Level of the ERα and ERβ expression was calculated as a ratio of specifically fluorescent cells (%) compared to the control (incubated with the secondary antibody only).

Results. The expression of ERα and ERβ was detected in all the NSCLC samples investigated. High variability in the level of the marker expression was revealed and it was shown 1,5–2,0-fold higher ERβ expression in the most tumors than that for ERα. The Spearman rank correlation coefficient of 0,364 (p <0,001) and the Pearson correlation coefficient of 0,401 (p <0,001) indicate statistically significant weak positive correlation between the levels of expression of ERβ and ERα.

Conclusion. The level of expression of ERβ as a main subtype of ER in NSCLC tissue could prove useful for selecting patients for antiestrogen therapy

About the authors

T. A. Bogush

N.N. Blokhin National Medical Research Center of Oncology, Ministry of Health of Russia

Author for correspondence.
Email: labmedchem@mail.ru
24 Kashirskoe Shosse, Moscow 115478 Russian Federation

O. M. Ryabinina

N.N. Blokhin National Medical Research Center of Oncology, Ministry of Health of Russia

24 Kashirskoe Shosse, Moscow 115478 Russian Federation

M. I. Papulina

M.V. Lomonosov Moscow State University

1 bldg., 27 Lomonosovsky pr-t, Moscow 119991 Russian Federation

E. A. Bogush

N.N. Blokhin National Medical Research Center of Oncology, Ministry of Health of Russia

24 Kashirskoe Shosse, Moscow 115478 Russian Federation

A. N. Grishanina

N.N. Blokhin National Medical Research Center of Oncology, Ministry of Health of Russia

24 Kashirskoe Shosse, Moscow 115478 Russian Federation

A. V. Karpukhin

Research Centre for Medical Genetics

1 Moskvorechie St., Moscow 115478 Russian Federation

B. E. Polotsky

N.N. Blokhin National Medical Research Center of Oncology, Ministry of Health of Russia

24 Kashirskoe Shosse, Moscow 115478

Russian Federation

M. M. Davydov

N.N. Blokhin National Medical Research Center of Oncology, Ministry of Health of Russia

24 Kashirskoe Shosse, Moscow 115478 Russian Federation

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