Early markers of breast cancer in nipple aspirate fluid

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dc.contributor.advisor Lee -Jane W Lu en_US
dc.contributor.committeeMember Suzanne AW Fuqua en_US
dc.contributor.committeeMember Karl E Anderson en_US
dc.contributor.committeeMember Jonanthan Ward en_US
dc.contributor.committeeMember Anthony M Haag en_US
dc.contributor.committeeMember Alexander Kurosky en_US
dc.creator Yafei Huang en_US
dc.date.accessioned 2011 -12 -20T16 :05 :06Z
dc.date.accessioned 2014 -02 -19T22 :05 :27Z
dc.date.available 2008 -06 -17 en_US
dc.date.available 2011 -12 -20T16 :05 :06Z
dc.date.available 2014 -02 -19T22 :05 :27Z
dc.date.created 2007 -07 -27 en_US
dc.date.issued 2007 -07 -12 en_US
dc.identifier.other etd -07272007 -153218 en_US
dc.identifier.uri http : / /hdl .handle .net /2152 .3 /194
dc.description.abstract Nipple aspirate fluid (NAF ) refers to the small amount of secretion that is found in breast ducts /lobules of most non -lactating women . This fluid can be collected repeatedly and non -invasively via the nipple using a modified breast pump , and therefore , it is considered to be a potential source for identifying markers of breast cancer . The purpose of this study was to understand factors associated with the ability to secrete fluid and factors associated with the major protein profiles in NAF ; and to identify protein profiles of NAF in a group of healthy non -lactating women who were 30 -40 years old , not pregnant , not breastfeeding , and not taking contraceptive medications . \r \n \r \nAmong 238 women studied , 66 % were secretors of NAF . Using multivariate logistic regression models , higher dietary intake of lactose [Odds Ratio (OR )=2 .7 ; 95 % Confidence Interval (CI ) : 1 .5 -4 .8] , earlier menarche (OR=0 .8 , CI : 0 .7 -1 .0 ) , being parous (OR=2 .3 , CI : 1 .0 -5 .6 ) , and older at first childbirth (OR=1 .5 , CI : 1 .0 -2 .1 ) were found to be independent and positive predictors for being a secretor of NAF . These findings suggest that dietary intake of lactose , a modifiable factor , may be used to change the NAF secretor status of women . \r \n \r \nNAF were analyzed for major proteins . Two major types of protein profiles , type I and type II , were identified . Type I NAF contains proteins found in cystic disease fluid of the breast , whereas type II NAF is enriched in milk -associated proteins . Using multiple logistic regression , type I NAF was predicted independently (P <0 .05 ) by higher body fat mass (Odds Ratio=3 .0 ; 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 and /or types of dietary and body fat . \r \n \r \nTwo different analytical strategies , 2D gel analysis coupled with MALDI -TOF /TOF , and 1D gel coupled with LC -MS /MS , were used to characterize protein profiles of type I and II NAF . Using these two strategies , a total of 99 proteins were identified : 13 unique to type I NAF , 57 unique to type II NAF , and 29 common to both types . These strategies will be used to characterize proteins in NAF of breast cancer cases . \r \n en_US
dc.format.medium electronic en_US
dc.language.iso eng en_US
dc.rights Copyright © is held by the author . Presentation of this material on the TDL web site by The University of Texas Medical Branch at Galveston was made possible under a limited license grant from the author who has retained all copyrights in the works . en_US
dc.subject proteomics en_US
dc.subject breast secretion en_US
dc.subject biomarker en_US
dc.title Early markers of breast cancer in nipple aspirate fluid en_US
dc.type.genre dissertation en_US
dc.type.material text en_US
thesis.degree.name PhD en_US
thesis.degree.level Doctoral en_US
thesis.degree.grantor The University of Texas Medical Branch en_US
thesis.degree.department Preventative Medicine and Community Health en_US

Citation

Early markers of breast cancer in nipple aspirate fluid. Doctoral dissertation, The University of Texas Medical Branch. Available electronically from http : / /hdl .handle .net /2152 .3 /194 .

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