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A strong association between body fat mass and protein profiles in nipple aspirate fluid of healthy premenopausal non-lactating women

  • Epidemiology
  • Published:
Breast Cancer Research and Treatment Aims and scope Submit manuscript

Abstract

Fluid can be aspirated from the nipples of most non-lactating women. This nipple aspirate fluid (NAF) is a potential source for the discovery of new breast cancer biomarkers. NAF has two distinct protein profiles. Type I NAF is similar to the fluid associated with cystic disease of the breast, whereas type II NAF is enriched in milk-associated proteins. The prevalence of these two profiles differs in healthy women and in breast cancer patients. This study investigated the relationship of these two NAF profiles to reproductive history, body composition, diet, and levels of lipids, steroids and thyroid hormones in healthy premenopausal women (age 30–40 years) who had regular menstrual cycles and normal mammograms and were not taking contraceptive medications. On average, women with the type I NAF profile were older, had more years since last childbirth, were less likely to have breastfed their babies and had higher dietary saturated fat intake, body mass index, body fat mass, and levels of plasma low density lipoproteins than women with the type II profile (P <0.05). Using multiple logistic regression, type I NAF was predicted independently (P <0.05) by higher body fat mass [Odds Ratio (OR) = 3.0; 95% Confidence Interval (CI): 1.5–6.1], more years since last childbirth (OR = 2.6; 95% CI: 1.3–5.2) and a higher percentage of calories from saturated fat (OR = 4.1; 95% CI: 1.1–14.6). These results suggest that protein profiles of NAF might be influenced by amounts or types of dietary and body fat, but further study of the relationship of the two profiles to breast cancer risk is needed.

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Abbreviations

NAF:

nipple aspirate fluid

ZAG:

zinc α2-glycoprotein

apoD:

apolipoprotein D

GCDFP-15:

gross cystic disease fluid protein 15 (prolactin-inducible protein)

BMI:

body mass index

DEXA:

dual energy X-ray absorptiometry

T3:

triiodothyronine

T4:

tetraiodothyronine

TSH:

thyroid stimulating hormone

HDL:

high density lipoprotein

LDL:

low density lipoprotein

VLDL:

very low density lipoprotein;

MALDI-TOF MS:

matrix-assisted laser desorption/ionization-time of flight mass spectrometry.

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Acknowledgements

We thank the staff of the GCRC at UTMB for nursing and dietary research assistance. Special thanks to study volunteers, Dr. Astrid Inniss for the analysis of food records, Dr. Marinel Ammenheuser for critical review of the manuscript, and the Mother’s Milk Bank at Austin for providing human breast milk samples.

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Correspondence to Lee-Jane W. Lu.

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Grant support: U.S. Army MRMC under DAMD17-01-1-0417, NIH NCRR GCRC M01 RR00073, NIH R01 CA95545, U.S. Army MRMC under W81XWH-04-1-0345, NIH 2 P30 ES06676, 1 R24 CA88317, AICR grant 01B110, and USPHS CA65628.

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Huang, Y., Nagamani, M., Anderson, K.E. et al. A strong association between body fat mass and protein profiles in nipple aspirate fluid of healthy premenopausal non-lactating women. Breast Cancer Res Treat 104, 57–66 (2007). https://doi.org/10.1007/s10549-006-9388-4

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  • DOI: https://doi.org/10.1007/s10549-006-9388-4

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