Pioglitazone ameliorates gentamicin ototoxicity by affecting the TLR and STAT pathways in the early postnatal organ of Corti
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ABSTRACT:
PROVIDER: PRJNA665218 | ENA |
REPOSITORIES: ENA
Dataset's files
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| SRR12697716.fastq.gz | Fastqsanger.gz | |||
| SRR12697717.fastq.gz | Fastqsanger.gz | |||
| SRR12697718.fastq.gz | Fastqsanger.gz | |||
| SRR12697719.fastq.gz | Fastqsanger.gz | |||
| SRR12697720.fastq.gz | Fastqsanger.gz |
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Project description:We evaluated the effects of pioglitazone in mouse organ of Corti (OC) explants to characterize its influence on signaling pathways involved in auditory hair cell damage. Organ of Corti explants were cultured with pioglitazone, gentamicin, or a combination of both agents. Pioglitazone treatment resulted in a significant repression of interferon (IFN)-alpha and -gamma pathways and downstream cytokines, as assessed by RNA sequencing and quantitative PCR gene expression assays. More detailed investigation at the single gene and protein level showed that pioglitazone mediated its anti-inflammatory effects through alterations of the Toll-like receptor (TLR) and STAT pathways. Together, these results indicate that pioglitazone significantly represses IFN and TLR in the cochlea, dampening the activity of gentamicin-induced pathways. These data support our previous results demonstrating significant protection of auditory hair cells in organ of Corti explants exposed to pioglitazone and other PPAR-targeted agents.
2020-09-24 | GSE158431 | GEO
Project description:Noise trauma, infection, and ototoxic drugs are frequent external causes of hearing loss. With no pharmacological treatments currently available, understanding the mechanisms and pathways leading to auditory hair cell (HC) damage and repair is crucial for identifying potential pharmacological targets. Prior research has implicated increased reactive oxygen species (ROS) and inflammation as general mechanisms of hearing loss common to diverse causes. Novel targets of these two key mechanisms of auditory damage may provide new paths toward the prevention and treatment of hearing loss. Pioglitazone, an oral antidiabetic drug from the class of thiazolidinediones, acts as an agonist of the peroxisome proliferator-activated receptor-gamma (PPAR-?) and is involved in the regulation of lipid and glucose metabolism. PPAR-? is an important player in repressing the expression of inflammatory cytokines and signaling molecules. We evaluated the effects of pioglitazone in the mouse Organ of Corti (OC) explants to characterize its influence on signaling pathways involved in auditory HC damage. The OC explants was cultured with pioglitazone, gentamicin, or a combination of both agents. Pioglitazone treatment resulted in significant repression of interferon (IFN)-? and -gamma pathways and downstream cytokines, as assessed by RNA sequencing and quantitative PCR gene expression assays. More detailed investigation at the single gene and protein level showed that pioglitazone mediated its anti-inflammatory effects through alterations of the Toll-like receptor (TLR) and STAT pathways. Together, these results indicate that pioglitazone significantly represses IFN and TLR in the cochlea, dampening the activity of gentamicin-induced pathways. These data support our previous results demonstrating significant protection of auditory HCs in the OC explants exposed to pioglitazone and other PPAR-targeted agents.
| S-EPMC7658481 | biostudies-literature
Project description:3T3-L1 cells treated 24 hours with either 0.1% DMSO, 20uM pioglitazone, 1uM rosiglitazone or 20uM troglitazone Keywords: other
2004-08-01 | GSE1458 | GEO
Project description:Goal of the experiment: To examine differential gene expression in the ovaries of heterozygous Lethal Yellow (C57BL/6J Ay/a) mice treated with vehicle or pioglitazone. Brief description of the experiment: The objective of this study was to use whole mouse genome DNA microarrays (Codelink) to examine gene expression the ovaries of heterozygous Lethal Yellow (C57BL/6J Ay/a) mice. Women with polycystic ovary syndrome (PCOS) treated with thiazolidinediones (TZD), such as pioglitazone, show reduced androgen levels and improved ovulatory function. Recent evidence suggests that TZD, acting via peroxisome proliferator-activated receptor gamma (PPAR gamma), alter the expression of ovarian genes involved in insulin/IGF signaling that may account for some of the observed effects. Since TZD can alter the expression of a large variety of genes, there may be other mechanisms involved in the improvement of ovarian function with TZD treatment. Lethal yellow (LY) mice exhibit progressive obesity, reproductive dysfunction, and altered metabolic regulation (e.g. insulin and leptin resistance) similar to women with PCOS. This study was designed to test the hypothesis that prolonged treatment of aging LY mice with pioglitazone would alter the expression of ovarian genes involved in reproduction. Beginning at 120-days and continuing until 180-days of age, female LY mice received daily oral doses of either 0.1 mg pioglitazone (n = 4) or an equal volume of vehicle (0.1 ml 100% DMSO; n = 4). At the end of the treatment regimen, ovaries were removed and RNA extracted. Total RNA extracts were run individually on Codelink Mouse Whole Genome Bioarrays (GE). Relative gene expression was compared between treatments by t-test using GeneSpring software. Keywords: mouse, drug treatment Experimental factors: drug treatment Keywords: drug treatment
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Project description:The purpose of the study was to investigate the nongenotoxic carcinogenic effect of Pioglitazone. Pioglitazone is a PPARgamma agonist and is known to cause bladder tumours in male rats and an increase in the incidence of bladder cancer in humans has been observed in patients treated with Pioglitazone. Pioglitazone is not considered genotoxic or carcinogenic in mice and tumours are only observed in male rats suggesting a nongenotoxic mechanism of tumorigenesis. A suggested hypothesis is urinary calculi formation and subsequent irritation, hyperplasia and metaplasia. Rosiglitazone was used as reference compound as this PPARgamma agonist does not cause changes in the bladder but cause lipoma/liposarcoma in rats.
2018-05-05 | GSE68604 | GEO
Project description:The purpose of the study was to investigate the nongenotoxic carcinogenic effect of Pioglitazone. Pioglitazone is a PPARgamma agonist and is known to cause bladder tumours in male rats and an increase in the incidence of bladder cancer in humans has been observed in patients treated with Pioglitazone. Pioglitazone is not considered genotoxic or carcinogenic in mice and tumours are only observed in male rats suggesting a nongenotoxic mechanism of tumorigenesis. A suggested hypothesis is urinary calculi formation and subsequent irritation, hyperplasia and metaplasia. Rosiglitazone was used as reference compound as this PPARgamma agonist does not cause changes in the bladder but cause lipoma/liposarcoma in rats.
2018-05-05 | GSE68592 | GEO
Project description:Insulin resistance is a common metabolic abnormality in women with PCOS and leads to an elevated risk of type 2 diabetes. Studies have shown that thiazolidinediones (TZD) improve metabolic disturbances in PCOS patients. We hypothesized that the effect of TZD in PCOS is in part mediated by changes in the transcriptional profile of muscle favoring insulin sensitivity. Using Affymetrix microarrays, we examined the effect of pioglitazone (30 mg/day for 16 weeks) on gene expression in skeletal muscle of 10 obese women with PCOS metabolically characterized by a euglycemic-hyperinsulinemic clamp. Moreover, we explored gene expression changes between these PCOS patients before treatment and 13 healthy control women. Treatment with pioglitazone improved insulin-stimulated total, oxidative and non-oxidative glucose metabolism, and reduced fasting serum insulin (all p < 0.05). Global pathway analysis using Gene Map Annotator and Pathway Profiler (GenMAPP 2.1) and Gene Set Enrichment Analysis (GSEA 2.0.1) revealed a significant upregulation of genes involved in mitochondrial oxidative phosphorylation (OXPHOS), ribosomal proteins, mRNA processing reactome, translation factors, and proteasome complexes in PCOS patients after pioglitazone therapy. Quantitative real-time PCR suggested that upregulation of OXPHOS genes was mediated by an increase in PGC-1α expression (p < 0.05). Expression of genes involved in ribosomal proteins and OXPHOS was down-regulated in PCOS patients before treatment compared to matched healthy women using GenMAPP 2.1 and GSEA 2.1. These data indicate that pioglitazone therapy restores insulin sensitivity in part by a coordinated upregulation of genes involved in mitochondrial oxidative metabolism and protein biosynthesis in skeletal muscle of PCOS. These transcriptional effects of pioglitazone therapy may contribute to prevent the onset of type 2 diabetes in these women. Keywords: PCOS, microarray, global pathway analysis, insulin resistance, pioglitazone, protein metabolism, mitochondrial oxidative metabolism
2008-11-10 | GSE8157 | GEO