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Effect of genom-wide depletion on gene expression during treatment with the JAK2 inhibitor Ruxolitinib of JAK2 mutated HEL erythroleukemia cells [CRISPR]

ABSTRACT: In order to confirm the functional dependency on KDM4C under treatment conditions with the JAK-inhibitor ruxolitinib (RUX), we applied a genome-wide CRISPR-Cas9 screen in the human JAK2-mutated cell line HEL by CRISPR/Cas9.

ORGANISM(S): Homo sapiens

PROVIDER: GSE203059 | GEO | 2022/05/18

REPOSITORIES: GEO

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Effect of depletion of KDM4C on gene expression of JAK2-mutated HEL erythroleukemia cells [RNA-seq]

Project description:To investigate the function of KDM4C in progression of leukemia, we established HEL-Cas9 cell lines in which the target gene has been knocked out by CRISPR/Cas9. We then performed transcriptome analysis using data obtained from RNA-seq of control or KDM4C depletd cells.

2022-05-18 | GSE203060 | GEO

Toxicicty of ruxolitinib in normal mice

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Effect of genom-wide depletion on gene expression during treatment with the JAK2 inhibitor Ruxolitinib of JAK2 mutated HEL erythroleukemia cells [CRISPR]

Project description:Effect of genom-wide depletion on gene expression during treatment with the JAK2 inhibitor Ruxolitinib of JAK2 mutated HEL erythroleukemia cells [CRISPR]

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Effect of depletion of KDM4C on gene expression of JAK2-mutated HEL erythroleukemia cells [RNA-seq]

Project description:Effect of depletion of KDM4C on gene expression of JAK2-mutated HEL erythroleukemia cells [RNA-seq]

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TBCRC 039: A phase II study of preoperative ruxolitinib with or without paclitaxel for triple-negative inflammatory breast cancer

Project description:We conducted a randomized phase II study with nested window-of-opportunity in patients with TN-IBC. Patients were randomized to receive a 7-day run-in of ruxolitinib (RUX) alone or ruxolitinib plus paclitaxel (RUX+PAC) in a 1:2 ratio, followed by 12 weeks of neoadjuvant paclitaxel alone or in combination with ruxolitinib in a 1:2 ratio. All patients subsequently received 4 cycles of doxorubicin plus cyclophosphamide, followed by modified radical mastectomy. Patients provided tumor tissue from research biopsies performed at baseline (pre-run-in) and after the completion of run-in therapy. Tumor tissue was evaluated for phosphorylated STAT3 (pSTAT3) using immunohistochemistry (IHC) and immunofluorescence, and a subset of cases were also analyze by RNA-seq. The primary objective was to evaluate the percent of patients whose tumors were pSTAT3-positive at baseline, and which subsequently became pSTAT3-negative after run-in therapy. Secondary endpoints included pathologic complete response (pCR), residual tumor burden (RCB) and event-free survival (EFS) from the date of surgery. There were 23 patients enrolled, 11 in RUX and 12 in RUX+PAC combination. The most common adverse events were fatigue and nausea. Two patients achieved pCR and 21 completed pre-operative therapy. We detected a decrease in pSTAT3 and IL6/JAK/STAT3 signaling pathways in post-run-in biopsies of RUX-treated samples, but this did not correlate with pCR, while RUX+PAC upregulated IL6/JAK/STAT3 signaling. Both treatments decreased GZM+ T cells implying immune suppression, which might have contributed to lack of efficacy.

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Project description:Background and methods: Ruxolitinib (RUX), a Jak1/2 inhibitor, has been reported to attenuate murine bone marrow failure recently. Its potential toxocicty of anemia and thrombocytopenia in human remains a concern. To minimize its potential toxoxicity, we tested therapeutic effectsof low dose ruxolitinib plus cyclosporine in murine model of immune-mediated bone marrow failure. Bone marrow CD8 and CD4 T cells were sorted from treated or untreated bone marrow failure mice. RNA-Seq and analysis was performed using SMART-Seq mRNA LP Kit (Takara) and the Illumina Novaseq6000, according to the Institute's protocols. Results: low dose of ruxolitinib plus cyclosporine improved pancytopenia and BM cellularity and decreased BM T cell infiltration in bone marrow failure mice. RNA sequencing demonstrated that low dose of ruxolitinib plus cyclosporine suppressed immune-related pathways in bone marrow infiltrated CD8 T cells and MHC-II expression in CD4 T cells compared with untreated mice. Conclusion: Our results demonstrate that low dose of ruxolitinib plus cyclosporine remains the efficacy in attenuation of disease and extending survival of immune-mediated bone marrow failure mice.

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