Megan R. Ansbro

ORCID: 0000-0002-7131-1610
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About
Contact & Profiles
Research Areas
  • Malaria Research and Control
  • Computational Drug Discovery Methods
  • Mosquito-borne diseases and control
  • Drug Transport and Resistance Mechanisms
  • Parasites and Host Interactions
  • Reproductive System and Pregnancy
  • Ubiquitin and proteasome pathways
  • Pregnancy and preeclampsia studies
  • Nanoparticle-Based Drug Delivery
  • Pharmacological Effects and Toxicity Studies
  • Peptidase Inhibition and Analysis
  • RNA Interference and Gene Delivery
  • Epilepsy research and treatment
  • Microbial Metabolites in Food Biotechnology
  • Immune responses and vaccinations
  • Antibiotic Resistance in Bacteria
  • Research on Leishmaniasis Studies
  • HIV/AIDS drug development and treatment
  • DNA Repair Mechanisms
  • Neonatal Respiratory Health Research
  • Antibiotics Pharmacokinetics and Efficacy
  • CRISPR and Genetic Engineering
  • Epigenetics and DNA Methylation
  • HIV Research and Treatment
  • Hemoglobinopathies and Related Disorders

Wellcome Sanger Institute
2018-2025

Cleveland Clinic
2023-2024

National Institute of Allergy and Infectious Diseases
2018-2023

National Institutes of Health
2018-2023

University of Cambridge
2022

Denison University
2014

National Cancer Institute
2013

Center for Cancer Research
2013

Deubiquitinating enzymes function to cleave ubiquitin (Ub) moieties from modified proteins, serving maintain the pool of free Ub in cell while simultaneously impacting fate and a target protein. Like all eukaryotes, Plasmodium parasites rely on dynamic addition removal for their own growth survival. While humans possess around 100 deubiquitinases, contains ∼20 putative hydrolases, many which bear little no resemblance those other organisms. In this study, we characterize falciparum UBP-1,...

10.1016/j.jbc.2025.108266 article EN cc-by Journal of Biological Chemistry 2025-02-03

ABCB1, also known as P-glycoprotein (P-gp) or multidrug resistance protein 1 (MDR1), is a membrane-associated transporter of the ATP-binding cassette (ABC) family. It one most widely studied transporters that enable cancer cells to develop drug resistance. Reliable high-throughput assays can identify compounds interact with ABCB1 are crucial for developing new therapeutic drugs. A assay measuring ABCB1-mediated calcein AM efflux was developed using fluorescent and phase-contrast live cell...

10.1371/journal.pone.0060334 article EN cc-by PLoS ONE 2013-04-10

Artemisinin derivatives and their partner drugs in artemisinin combination therapies (ACTs) have played a pivotal role global malaria mortality reduction during the last two decades. The loss of efficacy due to evolving drug-resistant parasites could become serious health threat. Dihydroartemisinin-piperaquine is well tolerated generally highly effective ACT. implementation drug ACTs critical control emerging resistance. Even though parasite clearance, it labile human body. A necessary for...

10.1016/j.ijpddr.2018.11.004 article EN cc-by International Journal for Parasitology Drugs and Drug Resistance 2018-12-01

Abstract Background Long regarded as an epicenter of drug-resistant malaria, Southeast Asia continues to provide new challenges the control Plasmodium falciparum malaria. Recently, resistance artemisinin combination therapy partner drug piperaquine has been observed in multiple locations across Asia. Genetic studies have identified single nucleotide polymorphisms well copy number variations plasmepsin 2 and 3 genes, which encode haemoglobin-degrading proteases that associate with clinical...

10.1186/s12936-020-03249-x article EN cc-by Malaria Journal 2020-05-13

Histone post-translational modifications have been shown to contribute DNA damage repair. Prior studies suggested that specific H3K79 methylation states play distinct roles in the response UV-induced damage. To evaluate these observations, we examined effect of altered patterns on G1/S checkpoint and sister chromatid exchange (SCE). We found di- trimethylated both activation varying degrees, depending synchronization method, although is not required for high levels UV In contrast, SCE...

10.1093/nar/gku242 article EN cc-by-nc Nucleic Acids Research 2014-04-19

Introduction Maternal intervillous monocytes (MIMs) and fetal Hofbauer cells (HBCs) are myeloid-derived immune at the maternal-fetal interface. reproductive history is associated with differential risk of pregnancy complications. The molecular phenotypes roles these distinct monocyte/macrophage populations influence gravidity on has not been systematically investigated. Methods Here, we used RNA sequencing to study transcriptional profiles MIMs HBCs in normal term pregnancies. Results Our...

10.3389/fimmu.2024.1384361 article EN cc-by Frontiers in Immunology 2024-06-26

The bacterial heterodimeric ATP-binding cassette (ABC) multidrug exporter PatAB has a critical role in conferring antibiotic resistance multidrug-resistant infections by Streptococcus pneumoniae. As with other ABC exporters, contains two transmembrane domains that form drug translocation pathway for efflux and nucleotide-binding bind ATP, one of which is hydrolysed during transport. structural functional elements exporters determine interactions drugs couple binding to nucleotide hydrolysis...

10.1111/febs.16366 article EN FEBS Journal 2022-01-23

The first-line treatments for uncomplicated Plasmodium falciparum malaria are artemisinin-based combination therapies (ACTs), consisting of an artemisinin derivative combined with a longer acting partner drug. However, the spread P. decreased susceptibility to and drugs presents significant challenge control efforts. To stem drug resistant parasites, novel chemotherapeutic strategies being evaluated, including implementation triple (TACTs). Currently, there is limited knowledge on...

10.1021/acsptsci.0c00110 article EN ACS Pharmacology & Translational Science 2020-11-02

Abstract Maternal intervillous monocytes (MIMs) and fetal Hofbauer cells (HBCs) are myeloid-derived immune at the maternal-fetal interface. Little is known regarding molecular phenotypes roles of these distinct monocyte/macrophage populations. Here, we used RNA sequencing to investigate transcriptional profiles MIMs HBCs in six normal term pregnancies. Our analyses revealed transcriptomes HBCs. Genes involved differentiation cell organization pathways were more highly expressed vs. In...

10.1101/2023.09.25.559419 preprint EN bioRxiv (Cold Spring Harbor Laboratory) 2023-09-28

Abstract Long regarded as an epicenter of drug-resistant malaria, Southeast Asia continues to provide new challenges the control Plasmodium falciparum malaria. Recently, resistance artemisinin combination therapy partner drug piperaquine has been observed in multiple locations across Asia. Genetic studies have identified a single nucleotide polymorphism well copy number variation molecular marker that associate with clinical and vitro resistance. The is duplication region containing members...

10.1101/655209 preprint EN bioRxiv (Cold Spring Harbor Laboratory) 2019-05-31

Abstract The first-line treatments for uncomplicated Plasmodium falciparum malaria are artemisinin-based combination therapies (ACTs), consisting of an artemisinin derivative combined with a longer acting partner drug. However, the spread P. decreased susceptibility to and drugs presents significant challenge control efforts. To stem drug resistant parasites, novel chemotherapeutic strategies being evaluated, including implementation triple (TACTs). Currently, there is limited knowledge on...

10.1101/2020.07.03.187039 preprint EN cc-by-nc-nd bioRxiv (Cold Spring Harbor Laboratory) 2020-07-03

Abstract ABCB1, also known as P-glycoprotein (P-gp) or multidrug resistance protein 1 (MDR1), is a membrane-associated transporter of the ATP-binding cassette (ABC) family. It one most widely studied transporters that enable cancer cells to develop drug resistance. Reliable high-throughput assays can identify compounds interact with ABCB1 are crucial for developing new therapeutic drugs. A assay measuring ABCB1-mediated calcein AM efflux was developed using IncuCyteFLR technology. Time- and...

10.1158/1538-7445.am2013-5635 article EN Cancer Research 2013-04-01

ABSTRACT Deubiquitinating enzymes function to cleave ubiquitin moieties from modified proteins, serving maintain the pool of free in cell while simultaneously impacting fate and a target protein. Like all eukaryotes, Plasmodium parasites rely on dynamic addition removal for their own growth survival. While humans possess around 100 DUBs, contains ∼20 putative hydrolases, many which bear little no resemblance those other organisms. In this study, we characterize Pf UBP-1, large hydrolase...

10.1101/2022.09.15.508122 preprint EN cc-by bioRxiv (Cold Spring Harbor Laboratory) 2022-09-15
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