Lamin A/C Haploinsufficiency Modulates the Differentiation Potential of Mouse Embryonic Stem Cells

Sehgal, P., Chaturvedi, P., Kumaran, R. I., Kumar, S., Parnaik, V. K. (February 2013) Lamin A/C Haploinsufficiency Modulates the Differentiation Potential of Mouse Embryonic Stem Cells. PLoS ONE, 8 (2). ISSN 1932-6203 (Electronic)

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DOI: 10.1371/journal.pone.0057891


BACKGROUND: Lamins are structural proteins that are the major determinants of nuclear architecture and play important roles in various nuclear functions including gene regulation and cell differentiation. Mutations in the human lamin A gene cause a spectrum of genetic diseases that affect specific tissues. Most available mouse models for laminopathies recapitulate disease symptoms for muscle diseases and progerias. However, loss of human lamin A/C also has highly deleterious effects on fetal development. Hence it is important to understand the impact of lamin A/C expression levels on embryonic differentiation pathways. METHODOLOGY AND PRINCIPAL FINDINGS: We have investigated the differentiation potential of mouse embryonic stem cells containing reduced levels of lamin A/C by detailed lineage analysis of embryoid bodies derived from these cells by culture. We initially carried out a targeted disruption of one allele of the mouse lamin A/C gene (). Undifferentiated wild-type and embryonic stem cells showed similar expression of pluripotency markers and cell cycle profiles. Upon spontaneous differentiation into embryoid bodies, markers for visceral endoderm such as α-fetoprotein were highly upregulated in haploinsufficient cells. However, neuronal markers such as β-III tubulin and nestin were downregulated. Furthermore, we observed a reduction in the commitment of cells into the myogenic lineage, but no discernible effects on cardiac, adipocyte or osteocyte lineages. In the next series of experiments, we derived embryonic stem cell clones expressing lamin A/C short hairpin RNA and examined their differentiation potential. These cells expressed pluripotency markers and, upon differentiation, the expression of lineage-specific markers was altered as observed with embryonic stem cells. CONCLUSIONS: We have observed significant effects on embryonic stem cell differentiation to visceral endoderm, neuronal and myogenic lineages upon depletion of lamin A/C. Hence our results implicate lamin A/C level as an important determinant of lineage-specific differentiation during embryonic development.

Item Type: Paper
Subjects: organism description > animal
organism description > animal > developmental stage
organism description > animal > developmental stage > embryo
organism description > animal > mammal > rodent > mouse
therapies > stem cells
CSHL Authors:
Communities: CSHL labs > Spector lab
CSHL Cancer Center Shared Resources > DNA Sequencing Service
CSHL Cancer Center Shared Resources > Microscopy Service
Depositing User: Matt Covey
Date: 25 February 2013
Date Deposited: 29 Mar 2013 19:46
Last Modified: 26 Dec 2014 16:51
PMCID: PMC3581495
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