Thyroid hormones and breast cancer association according to menopausal status and body mass index.

Autor: Ortega-Olvera C; Universidad Autónoma de San Luis Potosí, Facultad de Enfermería y Nutrición, Niño Artillero #130, Zona Universitaria, C.P. 78240, San Luis Potosí, S.L.P., México., Ulloa-Aguirre A; Red de Apoyo a la Investigación, Universidad Nacional Autónoma de México-Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, calle Vasco de Quiroga No. 15, Col. Belisario Domínguez Sección XVI, Del. Tlalpan, C.P. 14080, Ciudad de México, México., Ángeles-Llerenas A; Centro de Investigación en Salud Poblacional, Instituto Nacional de Salud Pública, Av. Universidad No. 655, Col. Santa María Ahuacatitlán, Cuernavaca, C.P. 62100, Morelos, México., Mainero-Ratchelous FE; Hospital de Ginecología y Obstetricia No. 4 Luis Castelazo Ayala, Instituto Mexicano del Seguro Social, Avenida Río Magdalena No. 289, Col. Tizapán, San Angel, Ciudad de México, C.P. 01090, México., González-Acevedo CE; Universidad Autónoma de San Luis Potosí, Facultad de Enfermería y Nutrición, Niño Artillero #130, Zona Universitaria, C.P. 78240, San Luis Potosí, S.L.P., México., Hernández-Blanco ML; Universidad Autónoma de San Luis Potosí, Facultad de Enfermería y Nutrición, Niño Artillero #130, Zona Universitaria, C.P. 78240, San Luis Potosí, S.L.P., México., Ziv E; Department of Medicine, Division of General Internal Medicine, Institute for Human Genetics, Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, 1450 3rd St, San Francisco, CA, 94143, USA.; Department of Epidemiology and Biostatistics, Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, 1450 3rd St, San Francisco, CA, 94143, USA., Avilés-Santa L; National Heart, Lung, and Blood Institute at the National Institutes of Health, 6701 Rockledge, Room 10188, Bethesda, MD, 20892, USA., Pérez-Rodríguez E; Hospital Universitario 'Dr José Eleuterio González'. Madero y Dr. Aguirre Pequeño, Col. Mitras, C.P. 64460, Monterrey, N.L., México., Torres-Mejía G; Centro de Investigación en Salud Poblacional, Instituto Nacional de Salud Pública, Av. Universidad No. 655, Col. Santa María Ahuacatitlán, Cuernavaca, C.P. 62100, Morelos, México. gtorres@insp.mx.; Instituto Nacional de Salud Pública, Centro de Investigación en Salud Poblacional, Avenida Universidad 655, Col. Santa María Ahuacatitlán, C.P. 62100, Cuernavaca, Morelos, México. gtorres@insp.mx.
Jazyk: angličtina
Zdroj: Breast cancer research : BCR [Breast Cancer Res] 2018 Aug 09; Vol. 20 (1), pp. 94. Date of Electronic Publication: 2018 Aug 09.
DOI: 10.1186/s13058-018-1017-8
Abstrakt: Background: Thyroxine (T4) has been positively associated with tumor cell proliferation, while the effect of triiodothyronine (T3) on cell proliferation has not been well-established because it differs according to the type of cell line used. In Mexico, it has been reported that 14.5% of adult women have some type of thyroid dysfunction and abnormalities in thyroid function tests have been observed in a variety of non-thyroidal illnesses, including breast cancer (BC). These abnormalities might change with body mass index (BMI) because thyroid hormones are involved in the regulation of various metabolic pathways and probably by menopausal status because obesity has been negatively associated with BC in premenopausal women and has been positively associated with BC in postmenopausal women.
Methods: To assess the association between serum thyroid hormone concentration (T4 and T3) and BC and the influence of obesity as an effect modifier of this relationship in premenopausal and postmenopausal women, we measured serum thyroid hormone and thyroid antibody levels in 682 patients with incident breast cancer (cases) and 731 controls, who participated in a population-based case-control study performed from 2004 to 2007 in three states of Mexico. We tested the association of total T4 (TT4) and total T3 (TT3) stratifying by menopausal status and body mass index (BMI), and adjusted for other health and demographic risk factors using logistic regressions models.
Results: Higher serum total T4 (TT4) concentrations were associated with BC in both premenopausal (odds ratio (OR) per standard deviation  = 5.98, 95% CI 3.01-11.90) and postmenopausal women (OR per standard deviation  = 2.81, 95% CI 2.17-3.65). In premenopausal women, the effect of TT4 decreased as BMI increased while the opposite was observed in postmenopausal women. The significance of the effect modification was marginal (p = 0.059) in postmenopausal women and was not significant in premenopausal women (p = 0.22). Lower TT3 concentrations were associated with BC in both premenopausal and postmenopausal women and no effect modification was observed.
Conclusions: There is a strong association between BC and serum concentrations of TT3 and TT4; this needs to be further investigated to understand why it happens and how important it is to consider these alterations in treatment.
Databáze: MEDLINE
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