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Determination of optimal freezing parameters of human prostate cancer in a nude mouse model
Author(s) -
Turk T.M.T.,
Rees M.A.,
Pietrow P.,
Myers C.E.,
Mills S.E.,
Gillenwater J.Y.
Publication year - 1999
Publication title -
the prostate
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.295
H-Index - 123
eISSN - 1097-0045
pISSN - 0270-4137
DOI - 10.1002/(sici)1097-0045(19990201)38:2<137::aid-pros7>3.0.co;2-5
Subject(s) - prostate cancer , prostate , lncap , cryosurgery , medicine , cancer , in vivo , prostate specific antigen , urology , pathology , biology , surgery , microbiology and biotechnology
BACKGROUND We sought to determine whether more than one freeze/thaw cycle is required and what minimum temperature reliably kills prostate cancer in vivo. METHODS Two human prostate cancer cell lines (LNCaP and PC3) were implanted subcutaneously in male nude BALB/c mice. Tumors were frozen with contemporary cryosurgery equipment and monitored for temperature, size, and serum prostate‐specific antigen (PSA) measurements. The tumors were subjected to one or two freeze/thaw cycles through a wide range of temperatures from 0–−80°C. RESULTS These experiments show that a single freeze/thaw to a temperature <−40°C is adequate to kill most tumor cells in this mouse model of prostate cancer. CONCLUSIONS Freezing prostate cancer to <−40°C and ensuring that the entire tumor is frozen is more important than additional freeze/thaw cycles in this experimental model. Prostate 38:137–143, 1999. © 1999 Wiley‐Liss, Inc.