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- W2945970145 abstract "the research the distribution of radiation induced damages among chromosomes and their bands in irra diated in vitro human blood lymphocytes and in unirradiated bystander cells.Material and methods of research: cultivation of human peripheral blood lymphocytes by semi micromethod D.A. Hungerford, modeling of radiation induced bystander effect in mixed cultures consisting of irradiated in vitro and non irradiated blood lymphocytes from persons of different gender, GTG staining of metaphase chromosomes and their cytogenetic analysis.Break points in chromosomes under the formation of aberrations were identified in exposed in vitro human peripheral blood lymphocytes in doses 0.25 Gy (95 breaks in 1248 cells) and 1.0 Gy (227 breaks in 726 cells) and in non irradiated bystander cells under their joint cultivation with irradiated in vitro human lymphocytes (51 breaks in 1137 cells at irradiation of adjacent populations of lymphocytes in dose 0.25 Gy and 75 breaks in 1321 cells at irradiation of adjacent population of lymphocytes in a dose 1.0 Gy). The distribution of injuries among the chromo somes and their bands was investigated.in radiation exposed in vitro human peripheral blood lymphocytes as well as in bystander cells the fre quency of damaged bands and number of breaks which localized in them exceeded the control value (p < 0.01). As under direct radiation exposure, as under formation of breaks due to induction of bystander effect, chromosomes were damaged according to their relative length. Location of bands with increasing number of breaks coincided with the «hot spots» of chromosome damage following irradiation and fragile sites. More sensitive to damage were G negative euchromatin chromosome bands, in which were localized 82 88 % breaks. Damageability of telomeric regions in the irradiated cells had no significant difference from the control, while in bystander cells was lower than control value (p < 0.05).Meta: doslidzhennia rozpodilu radiatsiy̆no indukovanykh poshkodzhen' sered khromosom i ïkh bendiv v oprominenykh in vitro limfotsytakh krovi liudyny ta v neoprominenykh klitynakh svidkakh.Material i metody doslidzhennia: kul'tyvuvannia limfotsytiv peryferychnoï krovi liudyny za napivmikrometodom D. A. Hungerford, modeliuvannia radiatsiy̆no indukovanogo efektu svidka v zmishanykh kul'turakh z oprominenykh in vitro ta neoprominenykh limfotsytiv krovi osib riznoï stati, GTG zabarvlennia metafaznykh khromosom ta ïkh tsytoge netychnyy̆ analiz.Rezul'taty. Identyfikovano tochky rozryviv khromosom pry formuvanni aberatsiy̆ v oprominenykh in vitro v dozakh 0,25 Gr (95 rozryviv v 1248 klitynakh) i 1,0 Gr (227 rozryviv v 726 klitynakh) limfotsytakh peryferychnoï krovi liu dyny ta v neoprominenykh klitynakh svidkakh pry ïkh sumisnomu kul'tyvuvanni z oprominenymy in vitro limfotsyta my liudyny (51 rozryv v 1137 klitynakh pry oprominenni sumizhnoï populiatsiï limfotsytiv v dozi 0,25 Gr ta 75 roz ryviv v 1321 klityni pry oprominenni sumizhnoï populiatsiï limfotsytiv v dozi 1 Gr). Doslidzheno rozpodil za reiestrovanykh poshkodzhen' sered khromosom ta ïkh bendiv.Vysnovky. V oprominenykh in vitro limfotsytakh peryferychnoï krovi liudyny ta klitynakh svidkakh chastota poshkod zhenykh bendiv ta kil'kist' rozryviv, iaki lokalizuvalys' v nykh, perevyshchuvala kontrol'nu (r < 0,01). Iak pry bez poseredn'omu poshkodzhenni ionizuiuchoiu radiatsiieiu, tak i pry formuvanni rozryviv vnaslidok induktsiï efektu svidka, khromosomy poshkodzhuvalys' vidpovidno do ïkh vidnosnoï dovzhyny. Roztashuvannia bendiv, v iakykh za reiestrovano bil'shu kil'kist' rozryviv, spivpadalo z «gariachymy tochkamy» poshkodzhuvanosti khromosom pry op rominenni ta fragil'nymy say̆tamy. Chutlyvishymy do poshkodzhennia buly G negatyvni eukhromatynovi smugy khro mosom, v iakykh lokalizuvalys' 82 88 % rozryviv. Poshkodzhuvanist' telomernykh ray̆oniv v oprominenykh klitynakh ne mala dostovirnoï riznytsi z kontrolem, a u klitynakh svidkakh bula nyzhche kontrol'noï (p < 0.05)." @default.
- W2945970145 created "2019-05-29" @default.
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- W2945970145 date "2016-01-01" @default.
- W2945970145 modified "2023-09-24" @default.
- W2945970145 title "Damage of chromosoms under irradiation of human blood lymphocytes and development of bystander effect" @default.
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- W2945970145 doi "https://doi.org/10.33145/2304-8336-2016-21-149-158" @default.
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