Project description:Class I histone deacetylase (HDAC) inhibitors are believed to have positive effects on neurite outgrowth, synaptic plasticity, and neurogenesis in adult brain. However, the downstream targets of class I HDAC inhibitor treatment in neurons are fully unclear. Although class I HDAC inhibitors are thought to broadly promote transcription of many neuronal genes through enhancement of histone acetylation, it is very interesting that the gene set might include as yet unidentified genes that are essential for neuronal survival and function. To identify novel target genes of class I HDAC inhibitor treatment, we screened transcripts of neuronal cultures with microarray using valproate acid.
Project description:The model predicts the inhibitory potential of small molecules against Histone deacetylase 3 (HDAC3), a relevant human target for cancer, inflammation, neurodegenerative diseases and diabetes. The authors have used a dataset of 1098 compounds from ChEMBL and validated the model using the benchmark MUBD-HDAC3.
Model Type: Predictive machine learning model.
Model Relevance: Probability that the molecule is a HDAC3 inhibitor
Model Encoded by: Sarima Chiorlu (Ersilia)
Metadata Submitted in BioModels by: Zainab Ashimiyu-Abdusalam
Implementation of this model code by Ersilia is available here:
https://github.com/ersilia-os/eos1n4b
Project description:The aim of this study is to determine the efficacy of combining the histone deacetylase (HDAC) inhibitor sodium valproate (VPA) with anti-EGFR monoclonal antibody (panitumumab or cetuximab) maintenance in the first-line treatment of patients with RAS wild type metastatic CRC.
Project description:<p>Diffuse Intrinsic Pontine Glioma (DIPG) is a universally fatal childhood cancer. Here, we performed a chemical screen in patient-derived DIPG cell cultures along with RNAseq expression analysis and integrated computational modeling to identify potentially effective therapeutic strategies. Panobinostat, among the more promising agents identified, demonstrated efficacy in pontine orthotopic xenograft models of both H3K27M and histone WT DIPG. These data suggest the potential utility of specific drug combinations and provides evidence of in vivo treatment efficacy of the multi-histone deacetylase inhibitor panobinostat. We are depositing to dbGaP deep sequencing whole exome data for 22 patient tumor samples and 13 matched normals, along with RNAseq data for 12 patient tumor samples and 6 normal pediatric brain tissue samples. In addition, we are depositing 22 RNAseq samples from DIPG cell lines before and after panobinostat treatment.</p>
Project description:This study is an open label non randomized study of hydroxychloroquine (HCQ) with histone deacetylase (HDAC) inhibitor Vorinostat in patients with advanced solid tumors to determine the maximum tolerated dose (MTD) and to evaluate the safety and antitumor activity of this drug combination.
Project description:Analysis of Class II Histone Deacetylase (HDAC) regulation of hepatic gluconeogenesis at the gene expression level. We show that in liver, Class IIa HDACs (HDAC4, 5, and 7) are all phosphorylated and excluded from the nucleus by AMPK family kinases. In response to the fasting hormone glucagon, Class IIa HDACs rapidly translocate to the nucleus where they directly bind to the promoters of gluconeogenic enzymes such as G6Pase. In turn, HDAC4/5 mediate the acute transcriptional induction of these genes via deacetylation and activation of Foxo family transcription factors. Loss of Class IIa HDACs in the murine liver results in inhibition of FOXO target genes and lowers blood glucose, resulting in increased glycogen storage. Total RNA obtained from primary hepatocytes infected with shGFP or shHDAC4 & 5 subjected to 2 or 4 hours treatment with DMSO or forskolin.
Project description:Aberrant epigenetic regulation is closely associated with drug tolerance, an early step in the acquisition of drug resistance. We previously reported that a pioneer transcriptional factor (also called an epigenetic initiator) rapidly induced by osimertinib, a third-generation epidermal growth factor receptor (EGFR) tyrosine kinase inhibitor, plays a pivotal role in promoting the formation of osimertinib-tolerant cells. In this study, to identify novel epigenetic factors associated with osimertinib-tolerance, we performed a comprehensive screening of epigenetic factors whose expression is rapidly induced by osimertinib. Our results revealed that HDAC5, a class IIa histone deacetylase (HDAC), is the most prominently induced epigenetic factor in EGFR-mutant non-small cell lung cancer (NSCLC) cell lines during the early response to osimertinib. Knockdown of HDAC5 significantly reduced the emergence of osimertinib-resistant cells. Furthermore, treatment with LMK235, a selective HDAC5 inhibitor, significantly increased global histone acetylation and enhanced osimertinib-induced apoptosis. These findings underscore the potential of HDAC5 as a novel therapeutic target to overcome osimertinib-resistance and propose LMK235 as a promising compound to provide significant therapeutic benefits for EGFR-mutant NSCLC patients undergoing osimertinib treatment.
