Collagen gel matrix assay as an in vitro chemosensitivity test for malignant astrocytic tumors.

Abstract:

BACKGROUND:The efficacy of individual chemotherapy based on chemosensitivity has scarcely been studied. METHODS:We examined the chemosensitivites for four anticancer agents - 1-(4-amino-2-methyl-5-pyrimidinyl) methyl-3 (2-chloroethyl)-3-nitrosourea hydrochloride (ACNU), carboplatin, cisplatin, and etoposide - of 43 malignant astrocytic tumors (21 anaplastic astrocytomas and 22 glioblastomas) by using a collagen gel matrix assay, and we also determined the survival periods of the tumor-bearing patients. The chemosensitivity was evaluated in terms of the growth inhibition rate, using 3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyl-tetrazolium bromide (MTT) method. RESULTS:For the anaplastic astrocytomas, the mean growth inhibitory rate was 33.2% with cisplatin, 37.2% with carboplatin, 28.0% with ACNU, and 24.8% with etoposide. For the glioblastomas, these rates were 36.9%, 42.3%, 23.2%, and 34.8%, respectively. The median overall and progression-free survivals of anaplastic astrocytoma-bearing patients who had undergone chemotherapy with two anticancer drugs, both of which showed significant anticancer activity (growth inhibitory rate >30%) were significantly longer than those of the patients who had been treated with two drugs, one or both of which did not show significant anticancer activity. On the other hand, there was no significant difference in the overall or the progression-free survivals in the two corresponding groups of glioblastoma-bearing patients. CONCLUSION:The collagen gel matrix assay is clinically useful to determine in vitro chemosensitivity that reflects in vivo chemosensitivity. Individual chemotherapy for malignant astrocytic tumors, based on chemosensitivity data, could contribute to longer survival, particularly in anaplastic astrocytoma-bearing patients.

journal_name

Int J Clin Oncol

authors

Ono A,Kanno H,Hayashi A,Nishimura S,Kyuma Y,Sato H,Ito S,Shimizu N,Chang CC,Gondo G,Yamamoto I,Sasaki T,Tanaka M

doi

10.1007/s10147-006-0636-8

subject

Has Abstract

pub_date

2007-04-01 00:00:00

pages

125-30

issue

2

eissn

1341-9625

issn

1437-7772

journal_volume

12

pub_type

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