Expression of nuclear envelope lamins A and C in human myeloid leukemias

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

The lamins are intermediate filament proteins that form a fibrous layer it the periphery of the nucleus. Experiments in cell-free systems have suggested that mammalian lamins A and C mediate an interaction between chromatin and the inner nuclear membrane that is essential for the reformation of the nucleus after mitosis. Other investigations, however, have suggested that lamins A and C are absent from myeloid cells and myeloid leukemia cell lines. To further investigate this apparent paradox, highly sensitive Western blotting techniques were utilized in the present study to examine the expression of lamins A and C in a series of human myeloid leukemia cell lines and in bone marrow samples from patients with acute nonlymphocytic leukemia (ANLL) and chronic myelogenous leukemia. Western blotting revealed that HL-60 progranulocytic leukemia cells contained an average of 0.1 × 106 copies of lamins A and C per cell compared to 0.5 × 106 copies of lamin B1 (the quantitatively prominent human B-type lamin) per cell. During the process of phorbol ester-induced maturation to macrophages, the mRNA for lamins A and C increased in abundance, with a concomitant 4-fold increase in the average cellular content of these polypeptides. To rule out the possibility that the low but detectable levels of lamins A and C observed in untreated HL-60 cells reflected incipient maturation, the content of lamins A and C was analyzed in ANLL cell lines that do not mature toward granulocytes or monocytes. Lamins A and C were readily detected in cell lines (KG1a, HEL, Mo-7e) derived from patients with a variety of subtypes of ANLL. Expression of lamins A and C was not limited to myeloid cell lines. These polypeptides were also detectable in marrow samples from 9 of 26 patients with ANLL including at least 1 patient from each of the 5 subtypes of ANLL examined. In contrast, only 1 of 12 marrow samples from patients with aggressive phase chronic myelogenous leukemia and chronic myelogenous leukemia in blast crisis contained readily detectable lamins A and C. The implications of these findings for current hypotheses regarding the functions of the lamin polypeptides are discussed.

Original languageEnglish (US)
Pages (from-to)2847-2853
Number of pages7
JournalCancer Research
Volume52
Issue number10
StatePublished - May 15 1992
Externally publishedYes

Fingerprint

Lamin Type A
Myeloid Leukemia
Nuclear Envelope
Acute Myeloid Leukemia
Myeloid Cells
Cell Line
Lamins
Bone Marrow
Leukemia, Myelogenous, Chronic, BCR-ABL Positive
Peptides
Leukemia, Myeloid, Accelerated Phase
Lamin Type B
Western Blotting
Blast Crisis
Intermediate Filament Proteins
Acute Promyelocytic Leukemia
Cell-Free System
HL-60 Cells
Phorbol Esters
Granulocytes

ASJC Scopus subject areas

  • Cancer Research
  • Oncology

Cite this

Expression of nuclear envelope lamins A and C in human myeloid leukemias. / Kaufmann, Scott H.

In: Cancer Research, Vol. 52, No. 10, 15.05.1992, p. 2847-2853.

Research output: Contribution to journalArticle

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