Transcriptomics

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Expression profiling of Sudanese visceral leishmaniasis patients pre- and post-treatment with sodium stibogluconate


ABSTRACT: Visceral leishmaniasis (VL) in Sudan caused by Leishmania donovani is fatal in susceptible individuals if untreated. Treatment with Sodium Stibogluconate (SSG) leads to post kala azar dermal leishmaniasis (PKDL) in 58% of patients. Here Affymetrix microarrays were used to identify genes differentially expressed in lymph nodes (N=9 paired samples) pre- and post-treatment with SSG. Using the Bioconductor package limma, 438 genes from 28,869 post quality-control probe-sets were differentially expressed (Pnominal≤0.02) post- versus pre-treatment. Canonical pathway analysis using Ingenuity Pathway Analysis identified “Role of NFAT in Regulation of Immune Response” (Pnominal=1.35x10-5; PBH-adjusted=4.79x10-3), “B Cell Development” (Pnominal=2.04x10-4; PBH-adjusted=0.024), “Fcγ Receptor-mediated Phagocytosis in Macrophages and Monocytes” (Pnominal=2.04x10-4; PBH-adjusted=0.024), and “OX40 Signaling” (Pnominal=2.82x10-4; PBH-adjusted=0.025) as pathways differentially regulated post- versus pre-treatment. Major network hub genes included TP53, FN1, MYC, BCL2, JUN, SYK, RUNX2, MMP1 and ACTA2. Top endogenous upstream regulators included IL-7 (P=2.28x10-6), TNF (P=4.26x10-6), APP (P=4.23x10-5) and SPI1/PI.1 (P=1.17x10-7). Top predicted chemical drug regulators included the flavonoid genistein (P=4.56x10-7) and the quinoline alkaloid camptothecin (P=5.14x10-5). These results contribute to our understanding of immuno-pathology associated with VL and response to SSG treatment. Further replication could identify novel therapeutic strategies that improve on SSG treatment and reduce the likelihood of progression to PKDL.

ORGANISM(S): Homo sapiens

PROVIDER: GSE95625 | GEO | 2017/03/03

SECONDARY ACCESSION(S): PRJNA377721

REPOSITORIES: GEO

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