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The H3ABioNet Seminar coordinators and task force cordially invite you to join us for our ninth webinar for 2022, the October seminar titled "From the continent to households, malaria parasite clans, interconnectivity, and survival strategies".
Seminar Format: A seminar talk will be provided by Dr Alfred Amambua-Ngwa, Associate Professor, Disease Control an Elimination Theme, Medical Research Council Unit The Gambia at London School of Hygiene and Tropical Medicine. International Fellow, Wellcome Sanger Institute. This intriguing talk will be 40 to 50 minutes long followed by 10 to 15 minutes of Questions & Answer as well as Discussion.
Seminar Date: Wednesday, 19 October 2022
Seminar time: 8am EST/ 5am PDT / 1pm UTC / 3pm CET/ 2pm WAT /2pm LT/ 3pm CAT / 4pm EAT
URL to join the seminar: https://tinyurl.com/webinar1910
Description: Malaria parasites infected over 220 million individuals in Africa, killing 602000 in 2021 alone. This persistent survival of the main malaria parasite is thanks to its successful arms race with its hosts and deployment of a vast genetic diversity to adapt across variable transmission ecologies and interventions. Understanding the history, genomic variation, population structure and connectivity of malaria parasite across Africa, within regions and down to the households is essential for stratification of interventions and sustaining malaria control and elimination. Coordinating genomic collaboration across 15 African countries, the Plasmodium Diversity Network Africa (PDNA) identified major Western, Central and Eastern African sub-populations, and a highly divergent Ethiopian population. All populations were significantly admixed except for Ethiopia. There is gene flow of indigenous West African drug resistance haplotypes to the East and East African haplotypes from Kenya to West Africa. In West Africa, parasite populations are dwindling from Senegal and The Gambia, risking increased divergence and adaptation to interventions. Drug resistance markers and invasion/antigenic loci are most differentiated between populations, with signatures of balancing selection dominant on surface and host-parasite interaction genes. These genetic signatures are common across country populations, where geneflow and recombination determine the dynamics of clusters of infections that can be targeted for elimination. Infection clusters persist within villages spreading mostly from within households evident from identity-by-descent between parasite isolates. Genomic approaches have defined structure of malaria parasites in Africa, with the basic infection unit being the household, which should be the focus of new intervention approaches such as reactive household chemotherapy.
About the Speaker:
Dr Alfred Amambua-Ngwa, Associate Professor, Disease Control an Elimination Theme, Medical Research Council Unit The Gambia at London School of Hygiene and Tropical Medicine. International Fellow, Wellcome Sanger Institute.
Dr Alfred Amambua Ngwa obtained BSc, MSc, and PhD degrees in Biochemistry (Molecular biology and immunopathogenesis) from the University of Buea, Cameroon. He joined MRC Unit The Gambia in 2006, engaging in cell biology, microarray, transcript analysis and genome sequencing to determine the diversity in erythrocyte invasion patterns and genetic signatures of selection of the deadliest malaria parasite, Plasmodium falciparum in Africa. In 2013, he was the first African recipient of an MRC Career Development Award, with which he started the Malaria Population Biology group with a focus on genomic diversity and drug resistance phenotypes in natural infections of malaria parasites. His current research includes phenotype-genotype association in malaria, human-Plasmodium parasite co-evolution, interaction, and transmission tracking to support the malaria elimination strategies. He works closely with several partners across Africa including the Pathogen Diversity Network Africa (PDNA) and African Association for Antimicrobial Resistance and Management (AAARM). He Leads the Pan-African Malaria Genetic Epidemiology Network (PAMGEN), an H3Africa program across eight African countries with emphasis on human genetic interactions in malaria, parasite, and vector diversity. He actively participates in several consortia and projects to develop genomics and bioinformatics capacity in Africa funded through the African Academy of Sciences and the Science for Africa Foundation
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The H3ABioNet Seminar coordinators and task force cordially invite you to join us for our seventh webinar for 2022, the July seminar titled "Role of variations in modern drug development and research – a way forward via structural bioinformatics approaches".
Seminar Format: A seminar talk will be provided by Prof. Özlem Tastan Bishop, a full Professor in structural bioinformatics at Rhodes University, South Africa and distinguished adjunct Professor at Saveetha University, Chennai, India.
This intriguing talk will be 40 to 50 minutes long followed by 10 to 15 minutes of Questions & Answer as well as Discussion.
Seminar Date: Wednesday, 20th July 2022
Seminar time: 8am EST/ 5am PDT / 1pm UTC / 3pm CET/ 2pm WAT /2pm LT/ 3pm CAT / 4pm EAT
URL to join the seminar: H3ABioNet_Webinars
Description: The genome sequences of humans and pathogens, and the variations attached to these data, can offer fundamental insights into disease prevention and treatment. Decoding the effects of missense mutations on protein structure and function is crucial to the understanding of the underlying causes of inherited diseases; drug toxicity in particular populations; and mechanisms of drug resistance, among others. While an enormous amount of genome data has been generated, the transition to post genomic analysis has been slow, thus widening the gap between data generation and translational utilization. For example, the human genome consists of about 20,000 protein coding genes and over 900 million variants. Systematic knowledge of the impact of genomic alterations in human is critical for the development of effective medicines. However, it is simply not feasible to study each and every one of these variants in detail. To date the effect of variations at the protein level is poorly studied in computational drug discovery research. This is mainly due to experimental difficulties in analyzing data at the protein structural level. We previously proposed a post-hoc analysis approach of molecular dynamics simulations using dynamic residue network analysis to consider the dynamic nature of functional proteins and protein-drug complexes and to probe the impact of mutations and their allosteric effects. This talk focuses on examples including drug resistance in infectious diseases; proposing computational approaches for common ways of dealing with different health problems.
About the Speaker:
Özlem is full Professor in structural bioinformatics at Rhodes University, South Africa and distinguished adjunct Professor at Saveetha University, Chennai, India. She received her BSc degree in Physics from Boğaziçi University, Istanbul, Turkey. Then she moved to the Department of Molecular Biology and Genetics at the same University for her MSc degree. She obtained her PhD from Max-Planck Institute for Molecular Genetics and Free University, Berlin, Germany in 2003. While doing her PhD, Özlem became interested in structural biology, and during her postdoctoral positions (Texas University, USA; University of Western Cape and University of Pretoria, South Africa) she gained experience in structural bioinformatics as well as structural biology. In 2009, Özlem took up an academic position at Rhodes University, South Africa. She established the Research Unit in Bioinformatics (RUBi) in 2013. She has graduated 21 PhD and over 35 MSc students since she joined Rhodes University. Recently, she received the Vice Chancellor’s Distinguished Senior Research award for 2020 and South African Society for Bioinformatics (SASBi) Silver Award, 2022. She serves on the Editorial Board for Frontiers in Molecular Biosciences and Frontiers in Applied Mathematics and Statistics, Biological Modeling and Simulation Section, and she is an Advisory Board member of F1000Research Bioinformatics Gateway.
Özlem’s broad research interest is structural bioinformatics and its applications to drug design and development. Her recent interest is in the allosteric mechanisms of proteins and understanding the effects of nonsynonymous single nucleotide variations on protein structure and function. She has published over 85 research articles.
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