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Rational design of a JAK1-selective siRNA inhibitor for the modulation of autoimmunity in the skin

ABSTRACT: Rational design of a JAK1-selective siRNA inhibitor for the modulation of autoimmunity in the skin

PROVIDER: PRJNA979262 | ENA |

REPOSITORIES: ENA

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Rational design of a JAK1-selective siRNA inhibitor for the modulation of autoimmunity in the skin

Project description:Inhibition of Janus kinase (JAK) family enzymes has surged as a popular strategy for treating inflammatory and autoimmune skin diseases. In the clinic, current available small molecule JAK inhibitors show distinct efficacy and safety profiles, likely reflecting their variable selectivity for JAK subtypes. Nonselective inhibition of multiple JAK enzymes is associated with increased side effects and has resulted in FDA-mandated black box warnings. Developing therapeutics to enable absolute JAK subtype selectivity is challenging and has not yet been achieved. Here, we harness RNA interference (RNAi) for rationally designing small interfering RNA (siRNA) therapeutics that offer sequence-specific gene silencing of JAK1, thus narrowing the spectrum of action on JAK-dependent cytokine signaling pathways to maintain efficacy and improve safety. We developed a fully chemically modified siRNA that supports efficient silencing of JAK1 expression in human skin explant and functional modulation of JAK1-dependent inflammatory signaling. A single injection of the JAK1 siRNA into mouse skin enables JAK1 silencing for 5 weeks in vivo. In a mouse model of vitiligo, local administration of the JAK1 siRNA significantly reduces skin infiltration of autoreactive CD8+ T cells and prevents epidermal depigmentation. This work outlines a robust framework for designing targeted RNAi-based therapies and establishes a path toward novel siRNA treatments for inflammatory and autoimmune skin diseases.

2023-10-18 | GSE234070 | GEO

Rational design of a JAK1-selective siRNA inhibitor for the modulation of autoimmunity in the skin.

Project description:Inhibition of Janus kinase (JAK) family enzymes is a popular strategy for treating inflammatory and autoimmune skin diseases. In the clinic, small molecule JAK inhibitors show distinct efficacy and safety profiles, likely reflecting variable selectivity for JAK subtypes. Absolute JAK subtype selectivity has not yet been achieved. Here, we rationally design small interfering RNAs (siRNAs) that offer sequence-specific gene silencing of JAK1, narrowing the spectrum of action on JAK-dependent cytokine signaling to maintain efficacy and improve safety. Our fully chemically modified siRNA supports efficient silencing of JAK1 expression in human skin explant and modulation of JAK1-dependent inflammatory signaling. A single injection into mouse skin enables five weeks of duration of effect. In a mouse model of vitiligo, local administration of the JAK1 siRNA significantly reduces skin infiltration of autoreactive CD8+ T cells and prevents epidermal depigmentation. This work establishes a path toward siRNA treatments as a new class of therapeutic modality for inflammatory and autoimmune skin diseases.

| S-EPMC10625637 | biostudies-literature

Cellular spermine targets JAK1 to restrain cytokine-mediated autoimmunity

Project description:Cellular spermine targets JAK1 to restrain cytokine-mediated autoimmunity

| PRJNA905367 | ENA

Cellular spermine targets JAK1 to restrain cytokine-mediated autoimmunity (Human)

Project description:Cellular spermine targets JAK1 to restrain cytokine-mediated autoimmunity (Human)

| PRJNA924822 | ENA

Cellular spermine targets JAK1 to restrain cytokine-mediated autoimmunity (Mouse)

Project description:Cellular spermine targets JAK1 to restrain cytokine-mediated autoimmunity (Mouse)

| PRJNA923703 | ENA

Cellular spermine targets JAK1 to restrain cytokine-mediated autoimmunity

Project description:Combining metabolomics analyses with an IFN-stimulated response elements reporter system, we identify spermine as a cellular metabolite brake for JAK1 signaling. Spermine directly binds to FERM and SH2 domains of JAK1 to impair IFNAR2-JAK1 interaction. Spermine suppresses JAK1 phosphorylation triggered by types I and II cytokines, including IFN-I/II, IL-2, and IL-6. Spermine treatment attenuates autoimmune pathogenesis in a SLE murine model and reduces IFN-I signaling in monocytes from SLE patients, which have reduced spermine levels.

2024-06-21 | GSE218731 | GEO

Cellular spermine targets JAK1 to restrain cytokine-mediated autoimmunity (Mouse)

2024-06-21 | GSE222887 | GEO

Rational design of cyanobacteria aptamer sensitizes prostate cancer to hormone therapy

Project description:Rational design of cyanobacteria aptamer sensitizes prostate cancer to hormone therapy

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Transcription profiling of human JAK1 wild-type and JAK1 mutation-positive T cell acute lymphoblastic leukemia blasts

Project description:Aberrant signal transduction contributes substantially to leukemogenesis. The Janus kinase 1 (JAK1) gene encodes a cytoplasmic tyrosine kinase that noncovalently associates with a variety of cytokine receptors and plays a nonredundant role in lymphoid cell precursor proliferation, survival, and differentiation. Somatic mutations in JAK1 occur in individuals with acute lymphoblastic leukemia (ALL). JAK1 mutations were more prevalent among adult subjects with the T cell precursor ALL, where they accounted for 18% of cases, and were associated with advanced age at diagnosis, poor response to therapy, and overall prognosis; We used microarray to compare the gene expression profile of JAK1 mutation positive or negative ALL blasts Experiment Overall Design: Thawed or freshly isolated T-ALL cells (>90% blasts) were homogenized, total RNA was extracted and hybridized on Affymetrix microarrays

2009-10-02 | E-GEOD-18239 | biostudies-arrayexpress

Rational Design of High Affinity Peptides Validates Histone Chaperone ASF1 as a New Epigenetic Target in Cancer

Project description:Starting from the structure of the human ASF1-histone complex, we developed a rational design strategy combining epitope tethering and optimization of interface contacts to identify a potent peptide inhibitor with a dissociation constant of 3 nM. LC-MS/MS was used to identify in vivo targets of the most prominent peptide inhibitor.

2019-09-25 | PXD013279 | Pride

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