학술논문
T regulační buňky v pupečníkové krvi dětí diabetických matek
T regulatory cells in cord blood of children of diabetic mothers
T regulatory cells in cord blood of children of diabetic mothers
Document Type
Text
Author
Source
Aktuální gynekologie a porodnictví: recenzovaný on-line časopis | 2012 Volume:4
Subject
Language
Czech
English
English
Abstract
Diabetes 1. typu (DM1) vzniká jako následek autoimunitní destrukce beta buněk pankreatu. Vliv diabetu na celkový výsledek těhotenství je poměrně dobře prostudován. Mnohem méně se toho však ví o vlivu diabetu matky na vyvíjející se imunitní systém plodu. Riziko rozvoje DM1 u dětí diabetických matek (pokud onemocněly před těhotenstvím) je nižší než např. u dětí diabetických otců. Tato diskrepance podporuje teorii, že by mohlo docházet k určitému navození imunotolerance u dětí DM1 matek. Z tohoto důvodu jsme si pro náš výzkum vybrali T regulační buňky (Tregs), které hrají důležitou roli v imunoregulaci a patogenezi mnoha autoimunitních onemocnění. Studie Tregs pupečníkové krve DM1 matek jsou navíc ojedinělé. Pomocí průtokové cytometrie jsme analyzovali zastoupení Tregs (definovaných jako CD45+ CD3+ CD4+ CD25+ CD127(low/-)) ve vzorcích pupečníkové krve od 17 matek s DM1, 17 s gestačním diabetem a 42 zdravých kontrol. Signifikantní rozdíl jsme nalezli jen v zastoupení Tregs z Th lymfocytů, kde v pupečníkové krvi zdravých matek činil tento poměr 9,25 % a u matek s DM1 6,73 % (p=0,043). Ostatní rozdíly nedosáhly signifikance. Pokud tedy dochází k navození specifické imunotolerance, je tato patrně podmíněna jinak než změnou počtu Tregs. Pokračujeme proto ve funkční analýze Tregs s cílem nalézt vysvětlení pro nižší výskyt diabetu u dětí DM1 matek ve srovnání s ostatními prvostupňovými příbuznými DM1 pacientů. Pochopení tohoto jevu by mohlo přispět např. i k vytvoření imunointervenční terapie DM1.
Type 1 diabetes (T1D) develops due to autoimmune pancreatic beta cells destruction. The effect of diabetes on pregnancy outcome is well documented. However, much less is known about the effect of maternal diabetes on the developing foetal immune system. The risk of T1D development in a child of T1D mother who was diagnosed prior pregnancy is lower than e.g. in a child of T1D father. This discrepancy supports the theory that there is some immunoregulatory influence on her baby. For this reason we decided to study T regulatory cells (Tregs) which are important in immunoregulation and for autoimmune diseases pathogenesis. Moreover Tregs cord blood (CB) studies of T1D mothers are limited. Tregs defined as CD45+ CD3+ CD4+ CD25+ CD127(low/-) in CB samples were investigated in our study by flow cytometry and 17 T1D mothers, 17 gestation diabetes mothers and 42 healthy controls were enrolled. We found just that CB from babies of T1D mothers contained 6,73 % Tregs/total Th-lymfocytes in comparison to 9,25 % in controls (p = 0,043). Other differences were not significant. If an establishment of specific immunological tolerance in foetus of T1D mother really exists, it seems to be rather due to other factors than just to changes in Tregs count (which was moreover found to be decreased). We are currently focused on explanation why children of T1D mothers suffer from diabetes less frequently than other first degree relatives by using functional analysis of Tregs. Insights in to this phenomenon would be useful e.g. for construction of T1D immunointervention therapy.
Tereza Ulmannová, Jindra Norková,Jana Včeláková, Dagmar Bartášková, Ivana Špálová, Kateřina Štechová: T regulační buňky v pupečníkové krvi dětí diabetických matek
Literatura 20
Type 1 diabetes (T1D) develops due to autoimmune pancreatic beta cells destruction. The effect of diabetes on pregnancy outcome is well documented. However, much less is known about the effect of maternal diabetes on the developing foetal immune system. The risk of T1D development in a child of T1D mother who was diagnosed prior pregnancy is lower than e.g. in a child of T1D father. This discrepancy supports the theory that there is some immunoregulatory influence on her baby. For this reason we decided to study T regulatory cells (Tregs) which are important in immunoregulation and for autoimmune diseases pathogenesis. Moreover Tregs cord blood (CB) studies of T1D mothers are limited. Tregs defined as CD45+ CD3+ CD4+ CD25+ CD127(low/-) in CB samples were investigated in our study by flow cytometry and 17 T1D mothers, 17 gestation diabetes mothers and 42 healthy controls were enrolled. We found just that CB from babies of T1D mothers contained 6,73 % Tregs/total Th-lymfocytes in comparison to 9,25 % in controls (p = 0,043). Other differences were not significant. If an establishment of specific immunological tolerance in foetus of T1D mother really exists, it seems to be rather due to other factors than just to changes in Tregs count (which was moreover found to be decreased). We are currently focused on explanation why children of T1D mothers suffer from diabetes less frequently than other first degree relatives by using functional analysis of Tregs. Insights in to this phenomenon would be useful e.g. for construction of T1D immunointervention therapy.
Tereza Ulmannová, Jindra Norková,Jana Včeláková, Dagmar Bartášková, Ivana Špálová, Kateřina Štechová: T regulační buňky v pupečníkové krvi dětí diabetických matek
Literatura 20