IA-1, a new marker for neuroendocrine differentiation in human lung cancer cell lines.

Abstract:

:IA-1 is a recently isolated novel complementary DNA which encodes a protein of 510 amino acids that contains both a zinc finger DNA-binding domain and a putative prohormone domain. mRNA expression of IA-1 has been found thus far only in tumors of neuroendocrine origin. In this report we describe the expression of IA-1 mRNA in a panel of 64 human lung cancer cell lines. IA-1 mRNA was detected by Northern blot analysis in 97% (30 of 31) of small cell lung cancer cell lines. In contrast, IA-1 mRNA was detected in only 13% (4 of 30) of non-small cell lung cancer cell lines. Nine of the 30 (30%) expressed either chromogranin A mRNA or produced L-dopa decarboxylase. Four of these 9 (44%) had detectable levels of IA-1 mRNA. In most of the lung cancer cell lines examined, IA-1 showed high concordance with the other neuroendocrine markers, L-dopa decarboxylase, and chromogranin A. The one exception was a variant small cell lung cancer cell line which expressed low or nondetectable levels of L-dopa decarboxylase. IA-1 is a candidate marker of neuroendocrine differentiation of human lung tumors.

journal_name

Cancer Res

journal_title

Cancer research

authors

Lan MS,Russell EK,Lu J,Johnson BE,Notkins AL

subject

Has Abstract

pub_date

1993-09-15 00:00:00

pages

4169-71

issue

18

eissn

0008-5472

issn

1538-7445

journal_volume

53

pub_type

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