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Effective "activated PI3K delta syndrome"-targeted therapy with the PI3Kd inhibitor leniolisib

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11130%2F17%3A10373484" target="_blank" >RIV/00216208:11130/17:10373484 - isvavai.cz</a>

  • Alternative codes found

    RIV/00064203:_____/17:10373484

  • Result on the web

    <a href="https://doi.org/10.1182/blood-2017-08-801191" target="_blank" >https://doi.org/10.1182/blood-2017-08-801191</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1182/blood-2017-08-801191" target="_blank" >10.1182/blood-2017-08-801191</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    Effective "activated PI3K delta syndrome"-targeted therapy with the PI3Kd inhibitor leniolisib

  • Original language description

    Pathogenic gain-of-function variants in the genes encoding phosphoinositide 3-kinase delta (PI3K delta) lead to accumulation of transitional B cells and senescent T cells, lymphadenopathy, and immune deficiency (activated PI3K delta syndrome [APDS]). Knowing the genetic etiology of APDS afforded us the opportunity to explore PI3K delta inhibition as a precision-medicine therapy. Here, we report in vitro and in vivo effects of inhibiting PI3K delta in APDS. Treatment with leniolisib (CDZ173), a selective PI3K delta inhibitor, caused dosedependent suppression of PI3Kd pathwayhy peractivation (measured as phosphorylation of AKT/S6) in cell lines ectopically expressing APDS-causative p110 delta variants and in T-cell blasts derived from patients. A clinical trial with 6 APDS patients was conducted as a 12-week, open-label, multisite, within-subject, dose-escalation study of oral leniolisib to assess safety, pharmacokinetics, and effects on lymphoproliferation and immune dysregulation. Oral leniolisib led to a dose-dependent reduction in PI3K/AKT pathway activity assessed ex vivo and improved immune dysregulation. We observed normalization of circulating transitional and naiveBcells, reduction in PD-11 CD41 and senescent CD57(+) CD4(-) T cells, and decreases in elevated serum immunoglobulin M and inflammatory markers including interferon gamma, tumor necrosis factor, CXCL13, and CXCL10 with leniolisib therapy. After 12 weeks of treatment, all patients showed amelioration of lymphoproliferation with lymph node sizes and spleen volumes reduced by 39% (mean; range, 26%-57%) and 40% (mean; range, 13%65%), respectively. Thus, leniolisib was well tolerated and improved laboratory and clinical parameters in APDS, supporting the specific inhibition of PI3Kd as a promising new targeted therapy in APDS and other diseases characterized by overactivation of the PI3Kd pathway.

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • OECD FORD branch

    30102 - Immunology

Result continuities

  • Project

  • Continuities

    I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Others

  • Publication year

    2017

  • Confidentiality

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

Data specific for result type

  • Name of the periodical

    Blood

  • ISSN

    0006-4971

  • e-ISSN

  • Volume of the periodical

    130

  • Issue of the periodical within the volume

    21

  • Country of publishing house

    US - UNITED STATES

  • Number of pages

    10

  • Pages from-to

    2307-2316

  • UT code for WoS article

    000416584400013

  • EID of the result in the Scopus database

    2-s2.0-85034829425