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Circulating prolactin and in situ breast cancer risk in the European EPIC cohort: A case-control study

Permanent lenke
https://hdl.handle.net/10037/24805
DOI
https://doi.org/10.1186/s13058-015-0563-6
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article.pdf (409.3Kb)
Publisert versjon (PDF)
Dato
2015-03-31
Type
Journal article
Tidsskriftartikkel
Peer reviewed

Forfatter
Tikk, Kaja; Sookthai, Disorn; Fortner, Renée T.; Johnson, Theron; Rinaldi, Sabina; Romieu, Isabelle; Tjønneland, Anne; Olsen, Anja; Overvad, Kim; Clavel-Chapelon, Françoise; Baglietto, Laura; Boeing, Heiner; Trichopoulou, Antonia; Lagiou, Pagona; Trichopoulos, Dimitrios; Masala, Giovanna; Krogh, Vittorio; Tumino, Rosario; Ricceri, Fulvio; Mattiello, Amalia; Agudo, Antonio; Menéndez, Virginia; Sánchez, María-José; Amiano, Pilar; Chirlaque, Maria-Dolores; Barricarte, Aurelio; Bueno-de-Mesquita, H. Bas; Monninkhof, Evelyn M.; Onland-Moret, N. Charlotte; Andresson, Anne; Sund, Malin; Weiderpass, Elisabete; Khaw, Kay-Tee; Key, Timothy J.; Travis, Ruth C.; Merritt, Melissa A.; Riboli, Elio; Dossus, Laure; Kaaks, Rudolf
Sammendrag
Introduction: The relationship between circulating prolactin and invasive breast cancer has been investigated previously, but the association between prolactin levels and in situ breast cancer risk has received less attention.

Methods: We analysed the relationship between pre-diagnostic prolactin levels and the risk of in situ breast cancer overall, and by menopausal status and use of postmenopausal hormone therapy (HT) at blood donation. Conditional logistic regression was used to assess this association in a case-control study nested within the European Prospective Investigation into Cancer and Nutrition (EPIC) cohort, including 307 in situ breast cancer cases and their matched control subjects.

Results: We found a significant positive association between higher circulating prolactin levels and risk of in situ breast cancer among all women [pre-and postmenopausal combined, ORlog2 = 1.35 (95% CI 1.04-1.76), Ptrend = 0.03]. No statistically significant heterogeneity was found between prolactin levels and in situ cancer risk by menopausal status (Phet = 0.98) or baseline HT use (Phet =< 0.20), although the observed association was more pronounced among postmenopausal women using HT compared to non-users (Ptrend = 0.06 vs Ptrend = 0.35). In subgroup analyses, the observed positive association was strongest in women diagnosed with in situ breast tumors <4 years compared to ≥4 years after blood donation (Ptrend = 0.01 vs Ptrend = 0.63; Phet = 0.04) and among nulliparous women compared to parous women (Ptrend = 0.03 vs Ptrend = 0.15; Phet = 0.07).

Conclusions: Our data extends prior research linking prolactin and invasive breast cancer to the outcome of in situ breast tumours and shows that higher circulating prolactin is associated with increased risk of in situ breast cancer.

Forlag
BMC
Sitering
Tikk K, Sookthai D, Fortner RT, Johnson T, Rinaldi S, Romieu I, Tjønneland A, Olsen A, Overvad K, Clavel-Chapelon F, Baglietto L, Boeing H, Trichopoulou A, Lagiou P, Trichopoulos D, Masala G, Krogh V, Tumino R, Ricceri F, Mattiello A, Agudo A, Menéndez V, Sánchez M, Amiano P, Chirlaque M, Barricarte A, Bueno-de-Mesquita HB, Monninkhof EM, Onland-Moret NC, Andresson, Sund M, Weiderpass E, Khaw K, Key TJ, Travis RC, Merritt MA, Riboli E, Dossus L, Kaaks R. Circulating prolactin and in situ breast cancer risk in the European EPIC cohort: A case-control study. Breast Cancer Research. 2015;17(49)
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Copyright 2015 The Author(s)

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