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dc.contributor.authorMaunda, K K Y
dc.contributor.authorMoore, James V
dc.date.accessioned2010-11-08T12:05:43Z
dc.date.available2010-11-08T12:05:43Z
dc.date.issued1987-02
dc.identifier.citationRadiobiology and stathmokinetics of intestinal crypts associated with patches of Peyer. 1987, 51 (2):255-64 Int. J Radiat Biol Relat Stud Phys Chem Meden
dc.identifier.issn0020-7616
dc.identifier.pmid3493990
dc.identifier.doi10.1080/09553008714550751
dc.identifier.urihttp://hdl.handle.net/10541/114944
dc.description.abstractThe stathmokinetics and radiobiology of intestinal crypts directly adjoining the lymphoid patches of Peyer, have been compared with those of non-patch-associated crypts. Patch crypts contain an additional one to two rings of cells, the Mitotic Index for the whole crypt is higher than in non-patch crypts, and the apparent cell cycle time is insignificantly lower. Using single and split doses of gamma-rays, dose-survival curves were obtained for whole intestinal crypts, from which single-cell survival curves were derived for the clonogenic cells of the crypt. For a single-hit, multitarget, model, the extrapolation numbers of the cell survival curves for patch and non-patch crypts were the same (approximately 35) but the final D0 for cells of the patch crypts was significantly higher (2.1 versus 1.7 Gy). A linear-quadratic fit gave a similar ratio of alpha/beta (approximately 10) for the two curves. For a given level of crypt depletion, the number of clonogenic cells per crypt derived by the use of equal split doses of radiation, was the same for patch and non-patch crypts. This number is a function of the dose regime employed: the higher the level of crypt depletion, the higher the derived number of cells (range 10 to 45, for non-patch crypts).
dc.language.isoenen
dc.subject.meshAnimals
dc.subject.meshCell Division
dc.subject.meshCell Survival
dc.subject.meshDose-Response Relationship, Radiation
dc.subject.meshIntestines
dc.subject.meshMale
dc.subject.meshMice
dc.subject.meshMitotic Index
dc.subject.meshPeyer's Patches
dc.titleRadiobiology and stathmokinetics of intestinal crypts associated with patches of Peyer.en
dc.typeArticleen
dc.identifier.journalInternational Journal of Radiation Biology and Related Studies in Physics, Chemistry, and Medicineen
html.description.abstractThe stathmokinetics and radiobiology of intestinal crypts directly adjoining the lymphoid patches of Peyer, have been compared with those of non-patch-associated crypts. Patch crypts contain an additional one to two rings of cells, the Mitotic Index for the whole crypt is higher than in non-patch crypts, and the apparent cell cycle time is insignificantly lower. Using single and split doses of gamma-rays, dose-survival curves were obtained for whole intestinal crypts, from which single-cell survival curves were derived for the clonogenic cells of the crypt. For a single-hit, multitarget, model, the extrapolation numbers of the cell survival curves for patch and non-patch crypts were the same (approximately 35) but the final D0 for cells of the patch crypts was significantly higher (2.1 versus 1.7 Gy). A linear-quadratic fit gave a similar ratio of alpha/beta (approximately 10) for the two curves. For a given level of crypt depletion, the number of clonogenic cells per crypt derived by the use of equal split doses of radiation, was the same for patch and non-patch crypts. This number is a function of the dose regime employed: the higher the level of crypt depletion, the higher the derived number of cells (range 10 to 45, for non-patch crypts).


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