Multinucleate: Difference between revisions
m link binucleated cells using Find link | Assisted by Citation bot |
|||
| Line 21: | Line 21: | ||
== Terminology == |
== Terminology == |
||
Some biologists use the term "acellular" to refer to multinucleate cell forms ([[Syncytium|syncitia]] and [[Plasmodium (life cycle)|plasmodia]]), such as to differentiate "acellular" slime molds from the purely "cellular" ones (which do not form such structures).<ref>{{cite book |url=https://books.google.com/ |
Some biologists use the term "acellular" to refer to multinucleate cell forms ([[Syncytium|syncitia]] and [[Plasmodium (life cycle)|plasmodia]]), such as to differentiate "acellular" slime molds from the purely "cellular" ones (which do not form such structures).<ref>{{cite book |url=https://books.google.com/?id=yd61229NHUgC&pg=PA130&lpg=PA130&dq=syncytial+acellular+-vaccine |title=Cell Movements: From Molecules to Motility |last=Bray |first=Dennis |date=2017-01-26 |publisher=Garland Science |isbn=978-0-8153-3282-4 |language=en}}</ref><ref>{{cite journal |last=Flemming |first=Anthony J. |last2=Shen |first2=Zai-Zhong |last3=Cunha |first3=Ana |last4=Emmons |first4=Scott W. |last5=Leroi |first5=Armand M. |date=2000-05-09 |title=Somatic polyploidization and cellular proliferation drive body size evolution in nematodes |journal=Proceedings of the National Academy of Sciences of the United States of America |volume=97 |issue=10 |pages=5285–5290 |issn=0027-8424 |pmc=25820 |pmid=10805788 |doi=10.1073/pnas.97.10.5285}}</ref><ref>{{cite book |url=https://books.google.com/?id=TFEA8Gg5_hAC&pg=PA90&lpg=PA90&dq=syncytial+acellular+-vaccine |title=Endosperm: Developmental and Molecular Biology |last=Olsen |first=Odd-Arne |date=2007-06-12 |publisher=Springer Science & Business Media |isbn=978-3-540-71235-0 |language=en}}</ref> This usage is incorrect and highly misleading to laymen, and as such it is strongly discouraged. |
||
Some use the term "syncytium" in a wide sense, to mean any type of multinucleate cell,<ref>Minelli, Alessandro (2009). Syncytia. In: ''Perspectives in Animal Phylogeny and Evolution''. Oxford University Press. p. 113-116. [https://books.google.com.br/books?id=jIASDAAAQBAJ link].</ref> while others differetiate the terms for each type.<ref>Studnicka, F. K. (1934). Die Grundlagen der Zellentheorie von Theodor Schwann. ''Anat. Anz.'' 78: 246—257.</ref> |
Some use the term "syncytium" in a wide sense, to mean any type of multinucleate cell,<ref>Minelli, Alessandro (2009). Syncytia. In: ''Perspectives in Animal Phylogeny and Evolution''. Oxford University Press. p. 113-116. [https://books.google.com.br/books?id=jIASDAAAQBAJ link].</ref> while others differetiate the terms for each type.<ref>Studnicka, F. K. (1934). Die Grundlagen der Zellentheorie von Theodor Schwann. ''Anat. Anz.'' 78: 246—257.</ref> |
||
| Line 38: | Line 38: | ||
==Pathological examples== |
==Pathological examples== |
||
Multinucleated cells can also occur under pathological conditions as the consequence of a disturbed [[cell cycle]] control (e.g., some [[binucleated |
Multinucleated cells can also occur under pathological conditions as the consequence of a disturbed [[cell cycle]] control (e.g., some [[binucleated cells]] and metastasizing [[tumor]] cells). |
||
==References== |
==References== |
||
Revision as of 02:02, 9 June 2018
 | This article needs additional citations for verification. (April 2009) |
Multinucleate cells (also called multinucleated or polynuclear cells) are eukaryotic cells that have more than one nucleus per cell, i.e., multiple nuclei share one common cytoplasm. Mitosis in multinucleate cells can occur either in a coordinated, synchronous manner where all nuclei divide simultaneously or asynchronously where individual nuclei divide independently in time and space. The multinucleate stage in the life cycle of some organisms is called plasmodium.
Although not normally viewed as a case of multinucleation, plant cells share a common cytoplasm by plasmodesmata, and most cells in animal tissues are in communication with their neighbors via gap junctions.[1]
Multinucleate cells, depending on the mechanism they are formed, can be divided into[2][3] "syncytia" (formed by cell fusion) or "coenocytes" (formed by nuclear division not being followed by cytokinesis).
The equivalent of multiple nuclei in prokaryotes is multiple nucleoids in bacteria such as in Proteus mirabilis swarmer cells.[citation needed]
Terminology
Some biologists use the term "acellular" to refer to multinucleate cell forms (syncitia and plasmodia), such as to differentiate "acellular" slime molds from the purely "cellular" ones (which do not form such structures).[4][5][6] This usage is incorrect and highly misleading to laymen, and as such it is strongly discouraged.
Some use the term "syncytium" in a wide sense, to mean any type of multinucleate cell,[7] while others differetiate the terms for each type.[8]
Physiological examples
Syncytia (cell fusion without karyogamy)
Multinucleate cells can occur naturally under physiological conditions by the fusion of the plasma membranes of cells thus forming syncytia. Examples include the skeletal muscle cells of mammals, the tapetal cells of plants, and the storage cells of Douglas-fir seeds.[9] The polymorphonuclear leukocytes of mammals are not polynuclear cells, although the lobes of their nuclei are so deeply bifurcated that they can appear so under suboptimal microscopy.
Osteoclasts are multinucleated cells which are found commonly in the human body that aid in the maintenance and repair of the bones by secreting acid that dissolves bone matter. They are typically found to have 5 nuclei per cell, due to the fusion of preosteoclasts.
The chlorarachniophytes form multinucleate cells by fusion, being syncytia and not coenocytes. This syncytia is called plasmodium, in the sense of a multinucleate protoplast without a cell wall which exhibits amoeboid movement.[10] Other examples include some plasmodiophorids, some haplosporidians,[11] and the grex of cellular slime moulds (dictyostelids and acrasids).
Coenocytes (karyokinesis without cytokinesis)
Furthermore, multinucleate cells are produced from specialized cell cycles in which nuclear division occurs without cytokinesis, thus leading to large coenocytes or plasmodia. In filamentous fungi, multinucleate cells may extend over hundreds of meters so that different regions of a single cell experience dramatically different microenvironments. Other examples include, the plasmodia of plasmodial slime molds (myxogastrids) and the schizont of the Plasmodium parasite which causes malaria.
Pathological examples
Multinucleated cells can also occur under pathological conditions as the consequence of a disturbed cell cycle control (e.g., some binucleated cells and metastasizing tumor cells).
References
- ^ https://www.ncbi.nlm.nih.gov/books/NBK26857/
- ^ Boyd, J. D.; Hamilton, W. J. (1966). "Electron microscopic observations on the cytotrophoblast contribution to the syncytium in the human placenta". Journal of Anatomy. 100 (Pt 3): 535–548. PMC 1270795. PMID 5965440.
- ^ Read, Nick D.; Roca, Gabriela M. (2006). "Chapter 5: Vegetative Hyphal Fusion in Filamentous Fungi". In Baluška, František; Volkmann, Dieter; Barlow, Peter W. (eds.). Cell-Cell Channels. Landes Bioscience and Springer Science+Business Media. pp. 87–98. ISBN 978-0-387-36058-4.
- ^ Bray, Dennis (2017-01-26). Cell Movements: From Molecules to Motility. Garland Science. ISBN 978-0-8153-3282-4.
- ^ Flemming, Anthony J.; Shen, Zai-Zhong; Cunha, Ana; Emmons, Scott W.; Leroi, Armand M. (2000-05-09). "Somatic polyploidization and cellular proliferation drive body size evolution in nematodes". Proceedings of the National Academy of Sciences of the United States of America. 97 (10): 5285–5290. doi:10.1073/pnas.97.10.5285. ISSN 0027-8424. PMC 25820. PMID 10805788.
- ^ Olsen, Odd-Arne (2007-06-12). Endosperm: Developmental and Molecular Biology. Springer Science & Business Media. ISBN 978-3-540-71235-0.
- ^ Minelli, Alessandro (2009). Syncytia. In: Perspectives in Animal Phylogeny and Evolution. Oxford University Press. p. 113-116. link.
- ^ Studnicka, F. K. (1934). Die Grundlagen der Zellentheorie von Theodor Schwann. Anat. Anz. 78: 246—257.
- ^ Von Aderkas, P.; Rouault, G.; Wagner, R.; Chiwocha, S.; Roques, A. (2005). "Multinucleate storage cells in Douglas-fir (Pseudotsuga menziesii (Mirbel) Franco) and the effect of seed parasitism by the chalcid Megastigmus spermotrophus Wachtl". Heredity. 94 (6): 616–622. doi:10.1038/sj.hdy.6800670. PMID 15829985.
- ^ Hoek, C. van den, Mann, D.G. and Jahns, H.M. (1995). Algae An Introduction to Phycology. Cambridge University Press, Cambridge
- ^ Brown, MW; Kolisko, M; Silberman, JD; Roger, AJ (2012). "Aggregative Multicellularity Evolved Independently in the Eukaryotic Supergroup Rhizaria". Current Biology. 22 (12): 1123–1127. doi:10.1016/j.cub.2012.04.021. PMID 22608512.
 | This cell biology article is a stub. You can help Wikipedia by expanding it. |