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Immunology and Infectious Disease Commons™
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Articles 31 - 46 of 46
Full-Text Articles in Immunology and Infectious Disease
Artemether-Lumefantrine Selects For Malaria Parasites With Decreased Lumefantrine Sensitivity Although Parasites Remain Sensitive To This Regimen In Tororo, Uganda, P. Tumwebaze, J. Bloome, O. Byaruhanga, C. Nakazibwe, A. Walakira, J. Okiring, S. L. Nsobya, Roland A. Cooper, P. J. Rosenthal
Artemether-Lumefantrine Selects For Malaria Parasites With Decreased Lumefantrine Sensitivity Although Parasites Remain Sensitive To This Regimen In Tororo, Uganda, P. Tumwebaze, J. Bloome, O. Byaruhanga, C. Nakazibwe, A. Walakira, J. Okiring, S. L. Nsobya, Roland A. Cooper, P. J. Rosenthal
Roland A. Cooper
Regulation Of Anti-Plasmodium Immunity By A Litaf-Like Transcription Factor In The Malaria Vector Anopheles Gambiae, Ryan C. Smith, Abraham G. Eappen, Andrea J. Radtke, Marcelo Jacobs-Lorena
Regulation Of Anti-Plasmodium Immunity By A Litaf-Like Transcription Factor In The Malaria Vector Anopheles Gambiae, Ryan C. Smith, Abraham G. Eappen, Andrea J. Radtke, Marcelo Jacobs-Lorena
Ryan C. Smith
The mosquito is the obligate vector for malaria transmission. To complete its development within the mosquito, the malaria parasite Plasmodium must overcome the protective action of the mosquito innate immune system. Here we report on the involvement of the Anopheles gambiae orthologue of a conserved component of the vertebrate immune system, LPS-induced TNFα transcription factor (LITAF), and its role in mosquito anti-Plasmodium immunity. An. gambiae LITAF-like 3 (LL3) expression is up-regulated in response to midgut invasion by both rodent and human malaria parasites. Silencing of LL3 expression greatly increases parasite survival, indicating that LL3 is part of an anti-Plasmodium defense …
Ex Vivo Drug Sensitivity Of Malaria Parasites Under Selective Pressure In Tororo, Uganda, P. K. Tumebaze, O. Byaruhanga, J. Okiring, S. L. Nsobya, R. A. Cooper, P. J. Rosenthal
Ex Vivo Drug Sensitivity Of Malaria Parasites Under Selective Pressure In Tororo, Uganda, P. K. Tumebaze, O. Byaruhanga, J. Okiring, S. L. Nsobya, R. A. Cooper, P. J. Rosenthal
Roland A. Cooper
The Armadillo Repeat Protein Pf16 Is Essential For Flagellar Structure And Function In Plasmodium Male Gametes, Ursula Straschil, Arthur M. Talman, David J. P. Ferguson, Karen A. Bunting, Zhengyao Xu, Elizabeth Bailes, Robert E. Sinden, Anthony A. Holder, Elizabeth F. Smith
The Armadillo Repeat Protein Pf16 Is Essential For Flagellar Structure And Function In Plasmodium Male Gametes, Ursula Straschil, Arthur M. Talman, David J. P. Ferguson, Karen A. Bunting, Zhengyao Xu, Elizabeth Bailes, Robert E. Sinden, Anthony A. Holder, Elizabeth F. Smith
Dartmouth Scholarship
Malaria, caused by the apicomplexan parasite Plasmodium, threatens 40% of the world's population. Transmission between vertebrate and insect hosts depends on the sexual stages of the life-cycle. The male gamete of Plasmodium parasite is the only developmental stage that possesses a flagellum. Very little is known about the identity or function of proteins in the parasite's flagellar biology. Here, we characterise a Plasmodium PF16 homologue using reverse genetics in the mouse malaria parasite Plasmodium berghei. PF16 is a conserved Armadillo-repeat protein that regulates flagellar structure and motility in organisms as diverse as green algae and mice. We show that …
Identification Of Novel Antimalarials From Marine Natural Products For Lead Discovery, Stephenie M. Alvarado
Identification Of Novel Antimalarials From Marine Natural Products For Lead Discovery, Stephenie M. Alvarado
Electronic Theses and Dissertations
An estimated 500 million cases of malaria occur each year. The increasing prevalence of drug resistant strains of Plasmodium in most malaria endemic areas has significantly reduced the efficacy of current antimalarial drugs for prophylaxis and treatment of this disease. Therefore, discovery of new, inexpensive, and effective drugs are urgently needed to combat this disease. Marine biodiversity is an enormous source of novel chemical entities and has been barely investigated for antimalarial drug discovery. In an effort to discover novel therapeutics for malaria, we studied the antimalarial activities of a unique marine-derived peak fraction library provided by Harbor Branch Oceanographic …
Chloroquine Susceptibility And Reversibility In A Plasmodium Falciparum Genetic Cross, Jigar J. Patel, Drew Thacker, John C. Tan, Perri Pleeter, Lisa Checkley, Joseph M. Gonzales, Bingbing Deng, Paul D. Roepe, Roland A. Cooper, Michael T. Ferdig
Chloroquine Susceptibility And Reversibility In A Plasmodium Falciparum Genetic Cross, Jigar J. Patel, Drew Thacker, John C. Tan, Perri Pleeter, Lisa Checkley, Joseph M. Gonzales, Bingbing Deng, Paul D. Roepe, Roland A. Cooper, Michael T. Ferdig
Biological Sciences Faculty Publications
Mutations in the Plasmodium falciparum chloroquine (CQ) resistance transporter (PfCRT) are major determinants of verapamil (VP)-reversible CQ resistance (CQR). In the presence of mutant PfCRT, additional genes contribute to the wide range of CQ susceptibilities observed. It is not known if these genes influence mechanisms of chemosensitization by CQR reversal agents. Using quantitative trait locus (QTL) mapping of progeny clones from the HB3 x Dd2 cross, we show that the P. falciparum multidrug resistance gene 1 (pfmdr1) interacts with the South-East Asia-derived mutant pfcrt haplotype to modulate CQR levels. A novel chromosome 7 locus is predicted to contribute …
Lipid Targets Of The Antimalarial Trioxanes In Plasmodium Falciparum, Carmony Leah Hartwig
Lipid Targets Of The Antimalarial Trioxanes In Plasmodium Falciparum, Carmony Leah Hartwig
Biological Sciences Theses & Dissertations
Malaria is among the most debilitating diseases of man. The protozoan parasite, Plasmodium falciparum, causes over a million annual fatalities. The antimalarial trioxanes, exemplified by artemisinin, are among the few pharmaceuticals for which clinical resistance has not become widespread. Artemisinin is a naturally occurring sesquiterpene lactone, containing a unique endoperoxide pharmacophore. Despite extensive study, the precise antimalarial mechanism of action of trioxanes remains elusive. Heme iron-mediated cleavage of the endoperoxide within the parasite digestive vacuole is hypothesized to generate cytotoxic metabolites capable of alkylating heme and damaging cellular macromolecules. The hypothesis of this research is that the endoperoxide pharmacophore …
Quantitative Dissection Of Clone-Specific Growth Rates In Cultured Malaria Parasites, Heather B. Reilly Ayala, Hongjian Wang, John A. Steuter, Anastasia M. Marx, Michael T. Ferdig
Quantitative Dissection Of Clone-Specific Growth Rates In Cultured Malaria Parasites, Heather B. Reilly Ayala, Hongjian Wang, John A. Steuter, Anastasia M. Marx, Michael T. Ferdig
Faculty Publications - Department of Biological & Molecular Science
Measurement of parasite proliferation in cultured red blood cells underpins many facets of malaria research, from drug sensitivity assays to assessing the impact of experimentally altered genes on parasite growth, virulence, and fitness. Pioneering efforts to grow Plasmodium falciparum in cultured red blood cells revolutionized malaria research and spurred the development of semi-high throughput growth assays using radio-labeled hypoxanthine, an essential nucleic acid precursor, as a reporter of whole-cycle proliferation (Trager and Jensen, 1976; Desjardins et al., 1979). Use of hypoxanthine (Hx) and other surrogate readouts of whole-cycle proliferation remains the dominant choice in malaria research. While amenable to high-throughput …
The Plasmodium Falciparum Chloroquine Resistance Transporter, Pfcrt, Mediates The Activity Of Chloroquine-Resistance Reversal Agents In The Malaria Parasite, Kristin Lane
Biological Sciences Theses & Dissertations
Chloroquine (CQ) resistant Plasmodium falciparum is a serious problem affecting 3.2 billion people in over 100 countries today. Most endemic malarious countries are among the poorest in the world and lack the resources to replace the inexpensive and highly effective CQ. CQ resistance (CQR) reversal agents are a potentially inexpensive solution to restoring CQ efficacy. CQR reversal agents are drugs that have little to no antimalarial activity alone, but in combination with CQ, they increase dmg accumulation in the parasite and enhance the sensitivity to CQ in CQR parasites. PfCRT is a putative transporter located on the parasite digestive vacuole …
Design, Synthesis, And Evaluation Of 10-N-Substituted Acridones As Novel Chemosensitizers In Plasmodium Falciparum, Jane X. Kelly, Martin J. Smilkstein, Roland A. Cooper, Kristin D. Lane, Robert A. Johnson, Aaron Janowsky, Rozalia A. Dodean, David J. Hinrichs, Rolf Winter, Michael Riscoe
Design, Synthesis, And Evaluation Of 10-N-Substituted Acridones As Novel Chemosensitizers In Plasmodium Falciparum, Jane X. Kelly, Martin J. Smilkstein, Roland A. Cooper, Kristin D. Lane, Robert A. Johnson, Aaron Janowsky, Rozalia A. Dodean, David J. Hinrichs, Rolf Winter, Michael Riscoe
Biological Sciences Faculty Publications
A series of novel 10-N-substituted acridones, bearing alkyl side chains with tertiary amine groups at the terminal position, were designed, synthesized, and evaluated for the ability to enhance the potency of quinoline drugs against multidrug-resistant (MDR) Plasmodium falciparum malaria parasites. A number of acridone derivatives, with side chains bridged three or more carbon atoms apart between the ring nitrogen and terminal nitrogen, demonstrated chloroquine (CQ)-chemosensitizing activity against the MDR strain of P. falciparum (Dd2). Isobolograrn analysis revealed that selected candidates demonstrated significant synergy with CQ in the CQ-resistant (CQR) parasite Dd2 but only additive (or indifferent) interaction in the CQ-sensitive …
Intellectual Property Management Strategies To Accelerate The Development And Access Of Vaccines And Diagnostics: Case Studies On Pandemic Influenza, Malaria And Sars, Anatole Krattiger, Stanley P. Kowalski, Robert Eiss, Anthony Taubman
Intellectual Property Management Strategies To Accelerate The Development And Access Of Vaccines And Diagnostics: Case Studies On Pandemic Influenza, Malaria And Sars, Anatole Krattiger, Stanley P. Kowalski, Robert Eiss, Anthony Taubman
Law Faculty Scholarship
Achieving global access to vaccines, diagnostics, and pharmaceuticals remains a challenge. Throughout the developing world, intellectual property (IP) constraints complicate access to critically essential medical technologies and products. Vaccines for malaria and pandemic strains of influenza, as well as diagnostic and vaccine technologies for SARS, are not only relevant to global public health but are particularly critical to the needs of developing countries. A global access solution is urgently needed. This article offers a timely case‐by‐case analysis of preliminary patent landscape surveys and formulates options via patent pools and other forms of creative IP management to accelerate development and access. …
Pfcg2, A Plasmodium Falciparum Protein Peripherally Associated With The Parasitophorous Vacuolar Membrane, Is Expressed In The Period Of Maximum Hemoglobin Uptake And Digestion By Trophozoites, Roland A. Cooper, Janni Papakrivos, Kristen D. Lane, Hisashi Fujioka, Klaus Lingelbach, Thomas E. Wellems
Pfcg2, A Plasmodium Falciparum Protein Peripherally Associated With The Parasitophorous Vacuolar Membrane, Is Expressed In The Period Of Maximum Hemoglobin Uptake And Digestion By Trophozoites, Roland A. Cooper, Janni Papakrivos, Kristen D. Lane, Hisashi Fujioka, Klaus Lingelbach, Thomas E. Wellems
Roland A. Cooper
Pfcrt Is More Than The Plasmodium Falciparum Chloroquine Resistance Gene: A Functional And Evolutionary Perspective, Roland A. Cooper, Carmony L. Hartwig, Michael T. Ferdig
Pfcrt Is More Than The Plasmodium Falciparum Chloroquine Resistance Gene: A Functional And Evolutionary Perspective, Roland A. Cooper, Carmony L. Hartwig, Michael T. Ferdig
Roland A. Cooper
Proteomic Approaches To Studying Drug Targets And Resistance In Plasmodium, R. A. Cooper, D. J. Carucci
Proteomic Approaches To Studying Drug Targets And Resistance In Plasmodium, R. A. Cooper, D. J. Carucci
Roland A. Cooper
Plasmepsin 4, The Food Vacuole Aspartic Proteinase Found In All Plasmodium Spp. Infecting Man, John B. Dame, Charles A. Yowell, Levi Omara-Opyene, Jane M. Carlton, Roland A. Cooper, Tang Li
Plasmepsin 4, The Food Vacuole Aspartic Proteinase Found In All Plasmodium Spp. Infecting Man, John B. Dame, Charles A. Yowell, Levi Omara-Opyene, Jane M. Carlton, Roland A. Cooper, Tang Li
Roland A. Cooper
Dr. Nott's Theory Of Insect Causation Of Disease, William A. Riley
Dr. Nott's Theory Of Insect Causation Of Disease, William A. Riley
Harold W. Manter Laboratory: Library Materials
Excerpt:
The danger in using isolated sentences from an article as a basis for interpreting the author's theories, is generally recognized, but sometimes the most careful workers fall into the trap. Once the mistaken interpretation is published, it may be copied over and over again until it rises to the dignity of a dogma.
A striking illustration is afforded by the practical unanimity with which writers on the subject of insects and disease credit Dr. Josiah Nott with being the earliest to formulate definitely the theory of mosquito transmission of yellow fever.
Nuttall, in his classic monograph On the Role …