Pharmacoproteomic analysis of prechemotherapy and postchemotherapy plasma samples from patients receiving neoadjuvant or adjuvant chemotherapy for breast carcinoma.

TitlePharmacoproteomic analysis of prechemotherapy and postchemotherapy plasma samples from patients receiving neoadjuvant or adjuvant chemotherapy for breast carcinoma.
Publication TypeJournal Article
Year of Publication2004
AuthorsPusztai L, Gregory BW, Baggerly KA, Peng B, Koomen J, Kuerer HM, Esteva FJ, W Symmans F, Wagner P, Hortobagyi GN, Laronga C, O Semmes J, Wright GL, Drake RR, Vlahou A
JournalCancer
Volume100
Issue9
Pagination1814-22
Date Published2004 May 01
ISSN0008-543X
KeywordsAdult, Aged, Antineoplastic Combined Chemotherapy Protocols, Biomarkers, Tumor, Biopsy, Needle, Breast Neoplasms, Case-Control Studies, Chemotherapy, Adjuvant, Cyclophosphamide, Doxorubicin, Drug Administration Schedule, Female, Fluorouracil, Humans, Mastectomy, Middle Aged, Neoadjuvant Therapy, Neoplasm Staging, Paclitaxel, Postoperative Care, Preoperative Care, Proteomics, Risk Assessment, Sensitivity and Specificity, Survival Analysis, Treatment Outcome
Abstract

BACKGROUND: In this study, proteomic changes were examined in response to paclitaxel chemotherapy or 5-fluorouracil, doxorubicin, and cyclophosphamide (FAC) chemotherapy in plasma from patients with Stage I-III breast carcinoma. The authors also compared the plasma profiles of patients with cancer with the plasma profiles of healthy women to identify breast carcinoma-associated protein markers.

METHODS: Sixty-nine patients and 15 healthy volunteers participated in the study. Plasma was sampled on Day 0 before chemotherapy and on Day 3 posttreatment in the 69 patients or 3 days apart in the 15 healthy women. Twenty-nine patients received preoperative chemotherapy, and 40 received postoperative chemotherapy. Surface-enhanced laser desorption/ionization mass spectrometry was used to generate protein mass profiles.

RESULTS: Few changes were observed in plasma during treatment. Only 1 protein peak was identified (mass/charge ratio [m/z], 2790) that was induced by paclitaxel and, to a lesser extent, by FAC chemotherapy. This proteomic response was detectable in 80% of patients who were treated preoperatively but also was present with lesser intensity in approximately 40% of patients treated postoperatively. There was no clear correlation between induction of m/z 2790 during a single course of treatment and final tumor response to preoperative chemotherapy. Five other peaks also were identified that discriminated between plasma from patients with breast carcinoma and plasma from normal women. These same peaks also were detectable in a subset of patients who already had undergone surgery to remove their tumors.

CONCLUSIONS: A single chemotherapy-inducible SELDI-MS peak and five other peaks that distinguished plasma obtained from patients with breast carcinoma from plasma obtained from normal, healthy women were identified. The (as yet unsequenced) proteins represented by these peaks are candidate markers of micrometastatic disease after surgery.

DOI10.1002/cncr.20203
Alternate JournalCancer
PubMed ID15112261
Grant ListU01 CA085067 / CA / NCI NIH HHS / United States
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