Follicular Helper T Cells in DiGeorge Syndrome

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11130%2F18%3A10376813" target="_blank" >RIV/00216208:11130/18:10376813 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00064203:_____/18:10376813

Výsledek na webu

<a href="https://doi.org/10.3389/fimmu.2018.01730" target="_blank" >https://doi.org/10.3389/fimmu.2018.01730</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3389/fimmu.2018.01730" target="_blank" >10.3389/fimmu.2018.01730</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Follicular Helper T Cells in DiGeorge Syndrome

Popis výsledku v původním jazyce

DiGeorge syndrome is an immunodeficiency characterized by thymic dysplasia resulting in T cell lymphopenia. Most patients suffer from increased susceptibility to infections and heightened prevalence of autoimmune disorders, such as autoimmune thrombocytopenia. B cells in DiGeorge syndrome show impaired maturation, with low switched-memory B cells and a wide spectrum of antibody deficiencies or dysgammaglobulinemia, presumably due to impaired germinal center responses. We set out to evaluate circulating follicular helper T cells (cTFHs) in DiGeorge syndrome, as markers of T-B interaction in the germinal centers in a cohort of 17 patients with partial DiGeorge and 21 healthy controls of similar age. cTFHs were characterized as CXCR5(+)CD45RA(-) CD4(+) T cells using flow cytometry. We verify previous findings that the population of memory CD4(+) T cells is relatively increased in diGeorge patients, corresponding to low naive T cells and impaired T cell production in the thymus. The population of CXCR5(+) memory CD4(+) T cells (cTFHs) was significantly expanded in patients with DiGeorge syndrome, but only healthy controls and not DiGeorge syndrome patients showed gradual increase of CXCR5 expression on cTFHs with age. We did not observe correlation between cTFHs and serum IgG levels or population of switched memory B cells. There was no difference in cTFH numbers between DiGeorge patients with/without thrombocytopenia and with/ without allergy. Interestingly, we show strong decline of PD1 expression on cTFHs in the first 5 years of life in DiGeorge patients and healthy controls, and gradual increase of PD1 and ICOS expression on CD4(-) T cells in healthy controls later in life. Thus, here, we show that patients with DiGeorge syndrome have elevated numbers of cTFHs, which, however, do not correlate with autoimmunity, allergy, or production of immunoglobulins. This relative expansion of cTFH cells may be a result of impaired T cell development in patients with thymic dysplasia.

Název v anglickém jazyce

Follicular Helper T Cells in DiGeorge Syndrome

Popis výsledku anglicky

DiGeorge syndrome is an immunodeficiency characterized by thymic dysplasia resulting in T cell lymphopenia. Most patients suffer from increased susceptibility to infections and heightened prevalence of autoimmune disorders, such as autoimmune thrombocytopenia. B cells in DiGeorge syndrome show impaired maturation, with low switched-memory B cells and a wide spectrum of antibody deficiencies or dysgammaglobulinemia, presumably due to impaired germinal center responses. We set out to evaluate circulating follicular helper T cells (cTFHs) in DiGeorge syndrome, as markers of T-B interaction in the germinal centers in a cohort of 17 patients with partial DiGeorge and 21 healthy controls of similar age. cTFHs were characterized as CXCR5(+)CD45RA(-) CD4(+) T cells using flow cytometry. We verify previous findings that the population of memory CD4(+) T cells is relatively increased in diGeorge patients, corresponding to low naive T cells and impaired T cell production in the thymus. The population of CXCR5(+) memory CD4(+) T cells (cTFHs) was significantly expanded in patients with DiGeorge syndrome, but only healthy controls and not DiGeorge syndrome patients showed gradual increase of CXCR5 expression on cTFHs with age. We did not observe correlation between cTFHs and serum IgG levels or population of switched memory B cells. There was no difference in cTFH numbers between DiGeorge patients with/without thrombocytopenia and with/ without allergy. Interestingly, we show strong decline of PD1 expression on cTFHs in the first 5 years of life in DiGeorge patients and healthy controls, and gradual increase of PD1 and ICOS expression on CD4(-) T cells in healthy controls later in life. Thus, here, we show that patients with DiGeorge syndrome have elevated numbers of cTFHs, which, however, do not correlate with autoimmunity, allergy, or production of immunoglobulins. This relative expansion of cTFH cells may be a result of impaired T cell development in patients with thymic dysplasia.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

30102 - Immunology

Projekt

<a href="/cs/project/NV18-05-00162" target="_blank" >NV18-05-00162: Moderní přístupy k primárním imunodeficiencím: uplatnění molekulární a funkční diagnostiky v terapii</a><br>

Návaznosti

S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Frontiers in Immunology

ISSN

1664-3224

e-ISSN

—

Svazek periodika

9

Číslo periodika v rámci svazku

July

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

9

Strana od-do

—

Kód UT WoS článku

000439460100002

EID výsledku v databázi Scopus

2-s2.0-85050316149