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A Temperature of 40 °C Appears to be a Critical Threshold for Potentiating Cytotoxic Chemotherapy In Vitro and in Peritoneal Carcinomatosis Patients Undergoing HIPEC.

Abstract：

BACKGROUND:Hyperthermic intraperitoneal chemotherapy (HIPEC) following cytoreductive surgery is a radical but effective treatment option for patients with peritoneal carcinomatosis (PC). Unfortunately, a standardized HIPEC protocol is missing impeding systematic comparisons with regard to minimal effective temperatures. OBJECTIVE:The purpose of the present study was to systematically analyse the precise minimal temperature needed for potentiation of chemotherapy effects in vitro and for patient survival. METHODS:We established a cell line-based model to mimic HIPEC conditions used in clinical practice, and evaluated intracellular drug concentrations and long-term survival using different temperatures ranging from 38 to 42 °C combined with cisplatin or doxorubicin. In parallel, we evaluated the temperature reached in the clinical setting by measuring inflow and outflow, as well as in two locations in the peritoneal cavity in 34 patients. Finally, we determined the influence of different HIPEC temperatures on survival. RESULTS:Long-term survival of cells treated with either cisplatin or doxorubicin was further improved only at temperatures above 40 °C. In patients, during HIPEC, constant temperatures were reached after 10 min in the peritoneal cavity. A temperature above 40 °C for at least 40 min was achieved in 68 % of patients over the 60 min duration of HIPEC. Importantly, we observed a significantly enhanced overall survival (OS) and progression-free survival (PFS) in those patients reaching temperatures above 40 °C. CONCLUSIONS:Hyperthermia significantly potentiated the chemotherapy effects only at temperatures above 40 °C in vitro. Importantly, this temperature threshold was also critical for OS and PFS of PC patients.

journal_name

Ann Surg Oncol

journal_title

Annals of surgical oncology

authors

Schaaf L,van der Kuip H,Zopf W,Winter S,Münch M,Mürdter TE,Thon KP,Steurer W,Aulitzky WE,Ulmer C

doi

10.1245/s10434-015-4853-0

subject

Has Abstract

pub_date

2015-12-01 00:00:00

pages

S758-65

eissn

1068-9265

issn

1534-4681

pii

10.1245/s10434-015-4853-0

journal_volume

22 Suppl 3

pub_type

杂志文章

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A Temperature of 40 °C Appears to be a Critical Threshold for Potentiating Cytotoxic Chemotherapy In Vitro and in Peritoneal Carcinomatosis Patients Undergoing HIPEC.