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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Zwerger, Monika Olins, Don E. Jaalouk, Diana E. Olins, Ada L. Weitz, David A. Ung, W. Lloyd Eydelnant, Irwin A. Herrmann, Harald Rowat, Amy C. Lammerding, Jan |
| Description | Author Affiliation: Rowat AC ( Department of Integrative Biology and Physiology, UCLA, Los Angeles, California 90095, USA. rowat@ucla.edu) |
| Abstract | Neutrophils are characterized by their distinct nuclear shape, which is thought to facilitate the transit of these cells through pore spaces less than one-fifth of their diameter. We used human promyelocytic leukemia (HL-60) cells as a model system to investigate the effect of nuclear shape in whole cell deformability. We probed neutrophil-differentiated HL-60 cells lacking expression of lamin B receptor, which fail to develop lobulated nuclei during granulopoiesis and present an in vitro model for Pelger-Huët anomaly; despite the circular morphology of their nuclei, the cells passed through micron-scale constrictions on similar timescales as scrambled controls. We then investigated the unique nuclear envelope composition of neutrophil-differentiated HL-60 cells, which may also impact their deformability; although lamin A is typically down-regulated during granulopoiesis, we genetically modified HL-60 cells to generate a subpopulation of cells with well defined levels of ectopic lamin A. The lamin A-overexpressing neutrophil-type cells showed similar functional characteristics as the mock controls, but they had an impaired ability to pass through micron-scale constrictions. Our results suggest that levels of lamin A have a marked effect on the ability of neutrophils to passage through micron-scale constrictions, whereas the unusual multilobed shape of the neutrophil nucleus is less essential. |
| ISSN | 00219258 |
| e-ISSN | 1083351X |
| Journal | Journal of Biological Chemistry |
| Issue Number | 12 |
| Volume Number | 288 |
| Language | English |
| Publisher | American Society for Biochemistry and Molecular Biology (United States) |
| Publisher Date | 2013-03-22 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Nuclear Envelope Metabolism Cell Movement Cell Nucleus Physiology Cell Nucleus Shape Gene Expression HL-60 Cells Lamin Type A Biosynthesis Genetics Microfluidic Analytical Techniques Neutrophil Infiltration Neutrophils Receptors, Cytoplasmic And Nuclear Tretinoin Pharmacology Research Support, N.I.H., Extramural Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. Biochemistry Molecular Biology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Cell Biology Biochemistry Molecular Biology |
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