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Cytoskeleton changes and impaired motility of monocytes at modelled low gravity

Meloni, Maria Antonia and Galleri, Grazia and Pippia, Proto Gavino and Cogoli-Greuter, Marianne (2006) Cytoskeleton changes and impaired motility of monocytes at modelled low gravity. Protoplasma, Vol. 229 (2-4), p. 243-249. eISSN 1615-6102. Article.

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DOI: 10.1007/s00709-006-0210-2

Abstract

Investigations performed in space have shown that gravity changes affect important cellular mechanisms like proliferation, differentiation, genetic expression, cytoskeletal architecture, and motility in lymphocytes, monocytes, and other mammalian cells. In particular, a dramatic depression of the mitogenic in vitro activation of human peripheral blood lymphocytes was observed at low gravity. The hypothesis of the present work is that a reduced interaction between T lymphocytes and monocytes, essential for the second signalling pathway, might be one of the reasons for the observed depression of the in vitro activation of human lymphocytes. Cell motility and with it a continuous rearrangement of the cytoskeletal network within the cell is essential for cell-tocell contacts. Whereas nonactivated lymphocytes in suspension are highly motile at low gravity, no data are available so far on the motility of adherent monocytes. It thus can be argued that impaired monocyte locomotion and cytoskeletal changes could be responsible for a reduced interaction of monocytes with T lymphocytes. In this study, the locomotion ability of J-111 cells, an adherent monocyte cell line, attached to colloidal gold particles on coverslips and exposed to modelled low gravity in the random positioning machine was found to be severely reduced compared with that of controls and the structures of actin, tubulin, and vinculin were affected.

Item Type:Article
ID Code:312
Status:Published
Refereed:Yes
Uncontrolled Keywords:Monocyte, locomotion, cytoskeleton, microgravity, random positioning machine
Subjects:Area 05 - Scienze biologiche > BIO/09 Fisiologia
Divisions:001 Università di Sassari > 01 Dipartimenti > Scienze fisiologiche, biochimiche e cellulari
Publisher:Springer Wien
eISSN:1615-6102
Additional Information:Pubblicato online il 16 dicembre 2006.
Deposited On:18 Aug 2009 10:02

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