LiSa-2, a novel human liposarcoma cell line with a high capacity for terminal adipose differentiation.

Abstract:

:LiSa-2 is a stable cell line derived from a poorly differentiated, pleomorphic liposarcoma. In serum-containing medium, LiSa-2 cells are fibroblastoid and rapidly dividing. In a serum-free, chemically defined culture medium containing physiological concentrations of insulin, triiodothyronine and cortisol, LiSa-2 cells divide slower and, extensively storing fat, acquire adipocyte morphology. In contrast to fibroblastoid LiSa-2 cells, these adipocyte-like LiSa-2 cells highly express transcripts for peroxisome proliferator-activated receptor-gamma, lipoprotein lipase, fatty acid synthetase, hormone-sensitive lipase, adipocyte most abundant gene transcript-1, glycerol-3-phosphate-dehydrogenase and the insulin-sensitive glucose transporter-4, all of which are specific for differentiated adipocytes. However, leptin mRNA expression was demonstrated only after preventing DNA methylation by incorporation of 5-aza-deoxycytidine into cellular DNA. Functionally, adipocyte-like LiSa-2 cells show increased insulin-dependent glucose uptake and lipid synthesis and are sensitive to lipolytic agents. This cell line may serve as an in vitro model for studying the regulation of human liposarcoma differentiation and for screening drugs for induction of differentiation-associated growth arrest in liposarcomas.

journal_name

Int J Cancer

authors

Wabitsch M,Brüderlein S,Melzner I,Braun M,Mechtersheimer G,Möller P

doi

10.1002/1097-0215(20001215)88:6<889::aid-ijc8>3.0.

keywords:

subject

Has Abstract

pub_date

2000-12-15 00:00:00

pages

889-94

issue

6

eissn

0020-7136

issn

1097-0215

pii

10.1002/1097-0215(20001215)88:6<889::AID-IJC8>3.0.

journal_volume

88

pub_type

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