Estrogen receptor positive ( ER+ : MCF-7 ) and negative ( ER- : MDA-MB-231 ) human breast cancer cell lines were utilized to evaluate the effects of tamoxifen ( TAM ) and estradiol ( E2 ) on modulation of breast cancer target susceptibility to lysis by lymphokine-activated killer ( LAK ) cells .
estrogen receptor positive ( er+ : mcf-7 ) and negative ( er- : mda-mb-231 ) human breast cancer cell lines were utilized to evaluate the effects of tamoxifen ( tam ) and estradiol ( e2 ) on modulation of breast cancer target susceptibility to lysis by lymphokine-activated killer ( lak ) cells .
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