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Articles 181 - 210 of 244
Full-Text Articles in Medicinal Chemistry and Pharmaceutics
Targeting Ribosome Assembly Factors Selectively Protects P53 Positive Cells From Chemotherapeutic Agents, Russell T. Sapio, Anastasiya Nezdyur, Matthew Krevetski, Leonid Anikin, Vincent J. Manna, N. Minkovsky, Dimitri G Pestov
Targeting Ribosome Assembly Factors Selectively Protects P53 Positive Cells From Chemotherapeutic Agents, Russell T. Sapio, Anastasiya Nezdyur, Matthew Krevetski, Leonid Anikin, Vincent J. Manna, N. Minkovsky, Dimitri G Pestov
Rowan-Virtua School of Osteopathic Medicine Departmental Research
Many chemotherapeutic agents act in a nondiscriminatory fashion, targeting both cancerous and noncancerous cells in Sphase and Mphase. One approach to reduce the toxic side effects in normal tissue is to exploit the differences in p53 functionality between cancerous and noncancerous cells. For example, activating p53 signaling by nongenotoxic means can transiently arrest noncancerous p53 positive cells in G1 phase and protect them from the cytotoxic effects of chemotherapeutic drugs. However, since most cancerous cells have faulty p53 signaling, they will proceed to cycle, and continue to be affected by the drug. In this study we asked if this G1‐phase …
In Silico Study Of Newly Synthesized Opioid Analgesics Bound To Three Opioid Receptors, Abdullah Allaoa, Mai Zahran
In Silico Study Of Newly Synthesized Opioid Analgesics Bound To Three Opioid Receptors, Abdullah Allaoa, Mai Zahran
Publications and Research
Opioids are the most widely used drugs for the treatment of moderate to severe, chronic pain. They achieve antinociception by activation of mu (MOR-1), kappa (KOR-1), and delta (DOR-1) opioid receptors. Natural products found in kratom plant, Mitragyna speciosa, represent diverse chemical groups with opioid activity, providing opportunities to better understand opioid pharmacology. Pharmacology studies show that Mitragynine pseudoindoxyl is a mu agonist/delta antagonist opioid with a signaling bias for G-protein-mediated signaling pathways in vitro and which produced potent antinociception in vivo. Respiratory depression assays along with other behavioral testing also showed that some of the major problems …
Comparing The Effectiveness Of Alternative And Prescription Antibiotics Against Gram-Positive Bacteria, Rachel Jenkins, Roan Dickenson, Sam Turnbull, Marcela Torres
Comparing The Effectiveness Of Alternative And Prescription Antibiotics Against Gram-Positive Bacteria, Rachel Jenkins, Roan Dickenson, Sam Turnbull, Marcela Torres
Senior Theses
The rapid emergence of antibiotic-resistant bacteria is a global public health concern that threatens the efficacy of antibiotic drugs. We found that natural remedies, specifically coconut oil, honey and cinnamon essential oil, have the potential to be used as a clinical alternative to treat antibiotic-resistant infections. In this experiment, we performed a disk diffusion test and measured the area of inhibition of each treatment to compare the effectiveness of natural and prescription antibiotics. Cinnamon essential oil showed significantly greater antibiotic activity compared to a prescription treatment, amoxicillin. With bacterial resistance continuously expanding, more work needs to be done to determine …
Autoethnography As An Instrument For Professional (Trans) Formation In Pharmaceutical Care Practice, Daniela Álvares Machado Silva, Simone Araújo Medina Mendonça, Maureen O´Dougherty, Djenane Ramalho De Oliveira, Clarice Chemello
Autoethnography As An Instrument For Professional (Trans) Formation In Pharmaceutical Care Practice, Daniela Álvares Machado Silva, Simone Araújo Medina Mendonça, Maureen O´Dougherty, Djenane Ramalho De Oliveira, Clarice Chemello
The Qualitative Report
The recent inclusion of pharmacists in primary healthcare in Brazil through the Family Health Support Team has encouraged them to reflect on the need to change from a professional focused on medications to one focused on individuals. This autoethnography allowed a pharmacist to confront her perspectives on clinical practice between 2014 and 2016, a period when she decided to challenge her traditional training as a pharmacist centered on medications. Using pharmaceutical care practice as the theoretical framework that prompted the profession of pharmacy to change its focus to the patient, the authors collaborated to construct a monologue that engages readers …
An Ethnobotanical Examination Of Traditional Medicine In Ngezi Forest Reserve, Tyler Tsang
An Ethnobotanical Examination Of Traditional Medicine In Ngezi Forest Reserve, Tyler Tsang
Independent Study Project (ISP) Collection
Traditional medicine is an important aspect of the both the culture and health of communities worldwide. Ngezi Forest Reserve is a protected area on Pemba Island which is part of the Zanzibar Archipelago. This forest contains a wealth of botanical diversity which includes many species of medicinal plants. Traditional healers (waganga) use these medicinal plants to heal members of the community. Interviews and forest walks with these healers were supplemented by consultations with a botanist to determine medicinal value of the forest and the surrounding areas. In compiling information from 15 healers in the area, 98 species of medicinal plants …
Phytochemical Screening And Determination Of Antibacterial, Anti-Tumorigenic And Dna Protection Ability Of Root Extracts Of Saussurea Lappa, Sughra Arif Minhas, Fida Muhammad Khan, Fakhar-I- Abbas, Abu Ul Hassan Faiz
Phytochemical Screening And Determination Of Antibacterial, Anti-Tumorigenic And Dna Protection Ability Of Root Extracts Of Saussurea Lappa, Sughra Arif Minhas, Fida Muhammad Khan, Fakhar-I- Abbas, Abu Ul Hassan Faiz
Journal of Bioresource Management
Saussurea lappa is a traditionally well-known plant for its medicinal uses in different indigenous systems of medicine. It is widely used in the treatment of asthma, ulcer, stomach problems and inflammatory diseases. In current study the phytochemical screening of S. lappa showed the presence of sesquiterpenes, anthraquinones, lignans, alkaloids, flavonoids, glycosides and steroids. Antimicrobial potential of subject plant was also investigated against three bacterial strains and maximum antibacterial activity was observed by CEE against S. aureus, CAE against P. aeruginosa, while CME, CEE, EAE and PEE showed almost same significant activity against E. coli. The CME (1000 …
B7h6: A Cancer Biomarker For The Development Of Novel Immunotherapy Approaches, Mariana Phillips
B7h6: A Cancer Biomarker For The Development Of Novel Immunotherapy Approaches, Mariana Phillips
Seton Hall University Dissertations and Theses (ETDs)
Cancer-based immunotherapy has led the evolution of biologics that can stimulate immune responses towards tumor eradication. The synthesis of small to intermediate size molecules with the targeting and effector functions of mAb may represent a novel class of immunotherapeutics that may overcome the limitations of their biological counterparts.Towards this objective, B7H6 has been identified as a protein ligand localized on the cell surface of transformed tumor cells. B7H6 binds specifically to the activating receptor NKp30, constitutively expressed on all resting and active NK cells. Upon ligand:receptor binding, B7H6 triggers NK cell activation and release of chemokines and pro-inflammatory cytokines such …
Synthesis And Evaluation Of A Novel Carbohydrate Template And Analogs Thereof For Potential Cns-Active Drugs, Emi Hanawa-Romero
Synthesis And Evaluation Of A Novel Carbohydrate Template And Analogs Thereof For Potential Cns-Active Drugs, Emi Hanawa-Romero
Seton Hall University Dissertations and Theses (ETDs)
Central nervous system (CNS) disorders are becoming a major societal problem. Examples of well-known CNS disorders are: neurodegenerative disorders such as Parkinson's, Huntington's and Alzheimer’s diseases, epilepsy/seizures, addiction, bipolar disorder, catalepsy, meningitis, migraines, attention deficit/hyperactivity disorder (ADHD), and multiple sclerosis. CNS disorders can be caused by various factors and therefore can affect ages, genders and races of all.
The population of patients with CNS disorders is increasing and a significant percentage of patients have symptoms that are not controlled by existing treatments. In addition, since CNS disorders are chronic disorder, there is no cure and thus the patients have to …
A Variant Pfcrt Isoform Can Contribute To Plasmodium Falciparum Resistance To The First-Line Partner Drug Piperaquine, Satish K. Dhingra, Devasha Redhi, Jill M. Combrinck, Tomas Yeo, John Okombo, Philipp P. Henrich, Ann N. Cowell, Purva Gupta, Matthew L. Stegman, Jonathan M. Hoke, Roland A. Cooper, Elizabeth Winzeler, Sachel Mok, Timothy J. Egan, David A. Fidock
A Variant Pfcrt Isoform Can Contribute To Plasmodium Falciparum Resistance To The First-Line Partner Drug Piperaquine, Satish K. Dhingra, Devasha Redhi, Jill M. Combrinck, Tomas Yeo, John Okombo, Philipp P. Henrich, Ann N. Cowell, Purva Gupta, Matthew L. Stegman, Jonathan M. Hoke, Roland A. Cooper, Elizabeth Winzeler, Sachel Mok, Timothy J. Egan, David A. Fidock
Collected Faculty Scholarship
Current efforts to reduce the global burden of malaria are threatened by the rapid spread throughout Asia of Plasmodium falciparum resistance to artemisininbased combination therapies, which includes increasing rates of clinical failure with dihydroartemisinin plus piperaquine (PPQ) in Cambodia. Using zinc finger nucleasebased gene editing, we report that addition of the C101F mutation to the chloroquine (CQ) resistance-conferring PfCRT Dd2 isoform common to Asia can confer PPQ resistance to cultured parasites. Resistance was demonstrated as significantly higher PPQ concentrations causing 90% inhibition of parasite growth (IC90) or 50% parasite killing (50% lethal dose [LD50]). This mutation also reversed Dd2-mediated CQ …
Pulmonary Surfactant Fortified With Cath-2 As A Novel Therapy For Bacterial Pneumonia, Brandon J. Baer
Pulmonary Surfactant Fortified With Cath-2 As A Novel Therapy For Bacterial Pneumonia, Brandon J. Baer
Western Research Forum
Background: Bacterial pneumonia is a leading cause of death worldwide, with high mortality rates persisting even after antibiotic treatment. Current treatments for pneumonia involve administration of antibiotics, however after the bacteria are killed they release toxic substances that induce inflammation and lung dysfunction. Host defense peptides represent a potential solution to this problem through their ability to down regulate inflammation. However, effective delivery to the lung is difficult because of the complex branching structure of the airways. My study addresses this delivery problem by using exogenous surfactant, a pulmonary delivery vehicle capable of improving spreading of these peptides throughout the …
Survival Model Of Intrahepatic Cholangiocarcinoma; Sex As A Biological Variable, Mary A. Phillippi, Justin L. Mott, Cody J. Wehrkamp, Ying Xie, David Oupicky, Ashley M. Mohr, Bailey A. Stringham
Survival Model Of Intrahepatic Cholangiocarcinoma; Sex As A Biological Variable, Mary A. Phillippi, Justin L. Mott, Cody J. Wehrkamp, Ying Xie, David Oupicky, Ashley M. Mohr, Bailey A. Stringham
Hepatobiliary Cancers: Pathobiology and Translational Advances
No abstract provided.
Network Inference Driven Drug Discovery, Gergely Zahoránszky-Kőhalmi, Tudor I. Oprea, Cristian G. Bologa, Subramani Mani, Oleg Ursu
Network Inference Driven Drug Discovery, Gergely Zahoránszky-Kőhalmi, Tudor I. Oprea, Cristian G. Bologa, Subramani Mani, Oleg Ursu
Biomedical Sciences ETDs
The application of rational drug design principles in the era of network-pharmacology requires the investigation of drug-target and target-target interactions in order to design new drugs. The presented research was aimed at developing novel computational methods that enable the efficient analysis of complex biomedical data and to promote the hypothesis generation in the context of translational research. The three chapters of the Dissertation relate to various segments of drug discovery and development process.
The first chapter introduces the integrated predictive drug discovery platform „SmartGraph”. The novel collaborative-filtering based algorithm „Target Based Recommender (TBR)” was developed in the framework of this …
Implementation Of Universal Hplc Analysis For Counterfeit Medication: A Partnership Of Purdue University And The Kilimanjaro School Of Pharmacy, Jordyn Mccord, Michael Mavity, David Wintczak
Implementation Of Universal Hplc Analysis For Counterfeit Medication: A Partnership Of Purdue University And The Kilimanjaro School Of Pharmacy, Jordyn Mccord, Michael Mavity, David Wintczak
Purdue Journal of Service-Learning and International Engagement
Jordyn McCord and Michael Mavity are 2016 graduates of both biological engineering and pharmaceutical sciences. David Wintczak is a third-year pharmacy doctoral candidate. Here, in their second article published in PJSL, they describe a weeklong study abroad course at the Kilimanjaro School of Pharmacy in Tanzania, designed to engage students in the implementation of methods for detecting counterfeit medications.
Synthetic And Biological Exploration Of (+)-Boldine - Identification Of Potential Cns Receptor Ligands, Sujay Joseph
Synthetic And Biological Exploration Of (+)-Boldine - Identification Of Potential Cns Receptor Ligands, Sujay Joseph
Theses and Dissertations
(+)-Boldine, an aporphine alkaloid, is reported to be biologically active at various Central Nervous System(CNS) receptors. However, only a few Structure Activity Relationship(SAR) studies have been conducted using boldine’s aporphine scaffold. A library of novel analogs was synthesized from boldine to understand the effect of bisbenzylation at C2 and C9 positions on the affinity and selectivity at the serotonin receptors.
Hiv Vaccines: Progress, Limitations And A Crispr/Cas9 Vaccine, Omar A. Garcia Martinez
Hiv Vaccines: Progress, Limitations And A Crispr/Cas9 Vaccine, Omar A. Garcia Martinez
Biology: Student Scholarship & Creative Works
ABSTRACT: The HIV-1 pandemic continues to thrive due to ineffective HIV-1 vaccines. Historically, the world’s most infectious diseases, such as polio and smallpox, have been eradicated or have come close to eradication due to the advent of effective vaccines. Highly active antiretroviral therapy is able to delay the onset of AIDS but can neither rid the body of HIV-1 proviral DNA nor prevent further transmission. A prophylactic vaccine that prevents the various mechanisms HIV-1 has to evade and attack our immune system is needed to end the HIV-1 pandemic. Recent advances in engineered nuclease systems, like the CRISPR/Cas9 system, have …
Impacts From The Use Of Antibiotics In Livestock: Methods Of Transmission Of Antibiotic Resistance From Livestock To Humans, Kristin M. Walden
Impacts From The Use Of Antibiotics In Livestock: Methods Of Transmission Of Antibiotic Resistance From Livestock To Humans, Kristin M. Walden
Biology: Student Scholarship & Creative Works
Antibiotic use in livestock production has been around since the 1950s. Antibiotic feed is used in livestock and other meat producing animals for three reasons: illness prevention, illness treatment, and growth promotion. Unfortunately, since the time that antibiotics were first invented, antibiotic resistant bacteria have become a threat to public health. There are many studies showing methods of transmission of antibiotic resistance from livestock to humans. Antibiotic resistance can spread from livestock to soil, water, insects, and food, which ultimately comes into contact with humans. A proposed study to measure antibiotic resistance when eliminating antibiotic feed will provide a hypothesis …
Exploring The Effect Of Novel Small Molecules On Oligodendrocyte Precursor Proliferation, Sagune Sakya
Exploring The Effect Of Novel Small Molecules On Oligodendrocyte Precursor Proliferation, Sagune Sakya
University Scholar Projects
Gliomas, a type of brain tumor, can be difficult to treat and have a poor survival rate. One pathway that leads to glioma formation is excessive signaling by platelet derived growth factors (PDGF) through PDGF receptor α (PDGFRα). Through this research, I found that novel compounds that downregulate PDGFRα decrease proliferation of Oli-neu cells, an oligodendrocyte precursor cell model, and identified signaling pathways through which these compounds may exert their effect. Further investigation may identify targets for development of glioma treatments.
Stabilization Of Gp120 Outer Domain For Hiv-1-1 Vaccine Immunogen Design, Duoyi Hu
Stabilization Of Gp120 Outer Domain For Hiv-1-1 Vaccine Immunogen Design, Duoyi Hu
School of Veterinary and Biomedical Sciences: Dissertations, Theses, and Student Research
The sole envelope glycoprotein spike on the surface of Human Immunodeficiency Virus (HIV-1) is composed of two subunits: gp120 and gp41. The gp120 consists of three domains: the inner domain, outer domain and bridging sheet, to which the viral primary receptor CD4 binds and induces a conformational change in gp120 to expose the co-receptor binding site. Previous studies have found that the outer domain of gp120 is relatively more stable than the inner domain and bridging sheet. When superimposed, the co-crystal structures of CD4-gp120 complex and VRC01-gp120 complex revealed that the CD4-binding site (CD4-BS) antibody VRC01 actually mainly bound to …
Synthesis And Biochemical Evaluation Of 3-Phenoxy-1,4-Diarylazetidin-2-Ones As Tubulin-Targeting Antitumor Agents, Thomas F. Greene, Shu Wang, Lisa M. Greene, Seema M. Nathwani, Jade K. Pollock, Azizah M. Malebari, Thomas Mccabe, Brendan Twamley, Niamh O'Boyle, Daniela M. Zisterer, Mary J. Meegan
Synthesis And Biochemical Evaluation Of 3-Phenoxy-1,4-Diarylazetidin-2-Ones As Tubulin-Targeting Antitumor Agents, Thomas F. Greene, Shu Wang, Lisa M. Greene, Seema M. Nathwani, Jade K. Pollock, Azizah M. Malebari, Thomas Mccabe, Brendan Twamley, Niamh O'Boyle, Daniela M. Zisterer, Mary J. Meegan
Articles
Structure-activity relationships for a series of 3-phenoxy-1,4-diarylazetidin-2-ones were investigated leading to the discovery of a number of potent antiproliferative compounds, including trans-4-(3-hydroxy-4-methoxyphenyl)-3-phenoxy-1-(3,4,5-trimethoxyphenyl)azetidin-2-one (78b) and trans-4-(3-amino-4-methoxyphenyl)-3-phenoxy-1-(3,4,5-trimethoxyphenyl)azetidin-2-one (90b). X-ray crystallography studies indicate the potential importance of the torsional angle between the 1-phenyl ‘A’ ring and 4-phenyl ‘B’ ring for potent antiproliferative activity, and that a trans configuration between the 3-phenoxy and 4-phenyl rings is generally optimal. These compounds displayed IC50 values of 38 nM and 19 nM respectively in MCF-7 breast cancer cells, inhibited the polymerization of isolated tubulin in vitro, disrupted the microtubular …
Exploration Of The Srx-Prx Axis As A Small-Molecule Target, Murli Mishra
Exploration Of The Srx-Prx Axis As A Small-Molecule Target, Murli Mishra
Theses and Dissertations--Toxicology and Cancer Biology
Lung cancer is a leading cause of cancer-related mortality irrespective of gender. The Sulfiredoxin (Srx) and Peroxiredoxin (Prx) are a group of thiol-based antioxidant proteins that plays an essential role in non-small cell lung cancer. Understanding the molecular characteristics of the Srx-Prx interaction may help design the strategies for future development of therapeutic tools. Based on existing literature and preliminary data from our lab, we hypothesized that the Srx plays a critical role in lung carcinogenesis and targeting the Srx-Prx axis or Srx alone may facilitate future development of targeted therapeutics for prevention and treatment of lung cancer. First, …
Medical Interns', Residents' And Attending Physicians' Attitudes Towards Integrative Medicine And Recommended Treatments For Patients With Psoriasis, Jennifer L. Pacyon
Medical Interns', Residents' And Attending Physicians' Attitudes Towards Integrative Medicine And Recommended Treatments For Patients With Psoriasis, Jennifer L. Pacyon
PCOM Psychology Dissertations
Background: Psoriasis is a multifactorial disease that effect approximately 7.5 million Americans. There are a variety of traditional treatments for psoriasis (e.g. topical medications, biologics) that for many, are effective in combating the disease. However, traditional treatments often have aversive side effects and may not be appropriate for every patient (e.g. pregnant women). Additionally, the efficacy of these medications are variable leaving some looking for adjunctive treatment options. There is increasing evidence to support the use of adjunctive treatments for psoriatic patients (e.g. psychotherapy, mindfulness). However, research is variable in regards to medical professionals’ attitudes towards integrative medicine (IM) as …
Piperlongumine (Piplartine) And Analogues: Antiproliferative Microtubule-Destabilising Agents, Mary J. Meegan, Seema M. Nathwani, Brendan Twamley, Daniela M. Zisterer, Niamh O'Boyle
Piperlongumine (Piplartine) And Analogues: Antiproliferative Microtubule-Destabilising Agents, Mary J. Meegan, Seema M. Nathwani, Brendan Twamley, Daniela M. Zisterer, Niamh O'Boyle
Articles
Piperlongumine (piplartine, 1) is a small molecule alkaloid that is receiving intense interest due to its antiproliferative and anticancer activities. We investigated the effects of 1 on tubulin and microtubules. Using both an isolated tubulin assay, and a combination of sedimentation and Western blotting, we demonstrated that 1 is a tubulin-destabilising agent. This result was confirmed by immunofluorescence and confocal microscopy, which showed that microtubules in MCF-7 breast cancer cells were depolymerised when treated with 1. We synthesised a number of analogues of 1 to explore structure-activity relationships. Compound 13 had the best cytotoxic profile of this series, …
The Effectiveness Of A Preoperative Multimodal Antiemetic Regimen On Reducing Early Postoperative Nausea And Vomiting In Total Joint Arthroplasty Patients, Jerry Mosley
Doctoral Projects
Postoperative nausea and vomiting (PONV) occurs frequently in all types of surgeries including after total joint orthopedic procedures. The resulting PONV can lead to many unwanted occurrences including immobilization, distress, and many serious adverse health complications. These unwanted occurrences may then lead to increased cost to the patient and healthcare facility. Administration of a preoperative multimodal regimen known to reduce PONV has the potential to reduce such unwanted anesthetic side effects influencing a reduction in overall healthcare cost. The purpose of this study is to determine the effectiveness of the preoperative kit which includes the administration of metoclopramide, famotidine, ondansetron, …
Street Drug Markets Beyond Favelas In Belo Horizonte, Brazil, Elenice De Souza Oliveira, Braulio Figueiredo Alves Silva, Marcos Oliveira Prates
Street Drug Markets Beyond Favelas In Belo Horizonte, Brazil, Elenice De Souza Oliveira, Braulio Figueiredo Alves Silva, Marcos Oliveira Prates
Department of Justice Studies Faculty Scholarship and Creative Works
This study examines whether social disorganization mechanisms that explain clusters of street drug markets in socially disorganized neighborhoods in developed countries can also help explain geographical patterns of drug dealing across neighborhoods in Belo Horizonte, Brazil. Data for this study includes drug arrests from 2007 to 2011 and socio demographic data from the 2010 Census. To examine the influence of exploratory variables on drug market locations, the Negative Binominal regression model was used at two levels of analysis—the Belo Horizonte city center and other neighborhoods including favelas. The findings show that a high hot spot of street drug markets located …
Normal Glycolytic Enzyme Activity Is Critical For Hypoxia Inducible Factor-1a Activity And Provides Novel Targets For Inhibiting Tumor Growth, Geoffrey Grandjean Phd
Normal Glycolytic Enzyme Activity Is Critical For Hypoxia Inducible Factor-1a Activity And Provides Novel Targets For Inhibiting Tumor Growth, Geoffrey Grandjean Phd
Dissertations and Theses (Open Access)
Normal Glycolytic Enzyme Activity is Critical for Hypoxia Inducible Factor-1α Activity and Provides Novel Targets for Inhibiting Tumor Growth
By Geoffrey Grandjean
Advisory Professor: Garth Powis, D. Phil
Unique to proliferating cancer cells is the observation that their increased need for energy is provided by a high rate of glycolysis followed by lactic acid fermentation in a process known as the Warburg Effect, a process many times less efficient than oxidative phosphorylation employed by normal cells to satisfy a similar energy demand [1]. This high rate of glycolysis occurs regardless of the concentration of oxygen in the cell and …
Lack Of Resistance Of Plasmodium Falciparum To Dihydroartemisinin In Uganda Based On Parasitogolgical And Molecular Assays, Roland A. Cooper, Melissa D. Conrad, Quentin D. Watson, Stephanie J. Huezo, Harriet Ninsiima, Patrick Tumwebaze, Samuel L. Nsobya, Philip J. Rosenthal
Lack Of Resistance Of Plasmodium Falciparum To Dihydroartemisinin In Uganda Based On Parasitogolgical And Molecular Assays, Roland A. Cooper, Melissa D. Conrad, Quentin D. Watson, Stephanie J. Huezo, Harriet Ninsiima, Patrick Tumwebaze, Samuel L. Nsobya, Philip J. Rosenthal
Collected Faculty Scholarship
- Artemisinin-‐based combination therapy is now standard treatment for falciparum malaria. However, this regimen is threatened by resistance to artemisinins, manifest as delayed clearance of parasitemia after therapy, in southeast Asia.
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Artemisinin resistance in southeast Asia is associated with increased parasitemias in culture, compared to those in sensi0ve parasites, 72 hours a=er a 6 hour pulse with 700 nM dihydroartemisinin (DHA), and with propeller domain polymorphisms in the Plasmodium falciparum kelch (K13; PF3D7_1343700) gene
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Given that artemether/lumefantrine has been adopted as standard therapy for malaria within the last decade in Uganda, we characterized artemisinin sensiBvity in fresh P. falciparum isolates from …
Mutations In The Plasmodium Falciparum Chloroquine Resistance Transporter, Pfcrt, Enlarge The Parasite's Food Vacuole And Alter Drug Sensitivities, Serena Pulcini, Henry M. Staines, Andrew H. Lee, Sarah H. Shafik, Guillaume Bouyer, Catherine M. Moore, Daniel A. Daley, Matthew J. Hoke, Lindsey M. Altenhofen, Heather J. Painter, Jianbing Mu, David J. P. Ferguson, Manuel Llinas, Rowen E. Martin, David A. Fidock, Roland Cooper, Sanjeev Krishna
Mutations In The Plasmodium Falciparum Chloroquine Resistance Transporter, Pfcrt, Enlarge The Parasite's Food Vacuole And Alter Drug Sensitivities, Serena Pulcini, Henry M. Staines, Andrew H. Lee, Sarah H. Shafik, Guillaume Bouyer, Catherine M. Moore, Daniel A. Daley, Matthew J. Hoke, Lindsey M. Altenhofen, Heather J. Painter, Jianbing Mu, David J. P. Ferguson, Manuel Llinas, Rowen E. Martin, David A. Fidock, Roland Cooper, Sanjeev Krishna
Collected Faculty Scholarship
Mutations in the Plasmodium falciparum chloroquine resistance transporter, PfCRT, are the major determinant of chloroquine resistance in this lethal human malaria parasite. Here, we describe P. falciparum lines subjected to selection by amantadine or blasticidin that carry PfCRT mutations (C101F or L272F), causing the development of enlarged food vacuoles. These parasites also have increased sensitivity to chloroquine and some other quinoline antimalarials, but exhibit no or minimal change in sensitivity to artemisinins, when compared with parental strains. A transgenic parasite line expressing the L272F variant of PfCRT confirmed this increased chloroquine sensitivity and enlarged food vacuole phenotype. Furthermore, the introduction …
Lack Of Artemisinin Resistance In Plasmodium Falciparum In Uganda Based On Parasitological And Molecular Assays, Roland A. Cooper, Melissa D. Conrad, Quentin D. Watson, Stephanie J. Huezo, Harriet Ninsiima, Patrick Tumwebaze, Samuel L. Nsobya, Philip J. Rosenthal
Lack Of Artemisinin Resistance In Plasmodium Falciparum In Uganda Based On Parasitological And Molecular Assays, Roland A. Cooper, Melissa D. Conrad, Quentin D. Watson, Stephanie J. Huezo, Harriet Ninsiima, Patrick Tumwebaze, Samuel L. Nsobya, Philip J. Rosenthal
Collected Faculty Scholarship
We evaluated markers of artemisinin resistance in Plasmodium falciparum isolated in Kampala in 2014. By standard in vitro assays, all isolates were highly sensitive to dihydroartemisinin (DHA). By the ring-stage survival assay, after a 6-h DHA pulse, parasitemia was undetectable in 40 of 43 cultures at 72 h. Two of 53 isolates had nonsynonymous K13-propeller gene polymorphisms but did not have the mutations associated with resistance in Asia. Thus, we did not see evidence for artemisinin resistance in Uganda.
Impact Of Antimalarial Treatment And Chemoprevention On The Drug Sensitivity Of Malaria Parasites Isolated From Ugandan Children, Patrick Tumwebaze, Melissa D. Conrad, Andrew Walakira, Norbert Leclair, Oswald Byaruhanga, Christine Nakazibwe, Benjamin Kozak, Jessica Bloome, Jaffer Okiring, Abel Kakuru, Victor Bigira, James Kapisi, Jennifer Legac, Jiri Gut, Roland A. Cooper, Moses R. Kamya, Diane V. Havlir, Grant Dorsey, Bryan Greenhouse, Samuel L. Nsobya, Philip J. Rosenthal
Impact Of Antimalarial Treatment And Chemoprevention On The Drug Sensitivity Of Malaria Parasites Isolated From Ugandan Children, Patrick Tumwebaze, Melissa D. Conrad, Andrew Walakira, Norbert Leclair, Oswald Byaruhanga, Christine Nakazibwe, Benjamin Kozak, Jessica Bloome, Jaffer Okiring, Abel Kakuru, Victor Bigira, James Kapisi, Jennifer Legac, Jiri Gut, Roland A. Cooper, Moses R. Kamya, Diane V. Havlir, Grant Dorsey, Bryan Greenhouse, Samuel L. Nsobya, Philip J. Rosenthal
Collected Faculty Scholarship
Changing treatment practices may be selecting for changes in the drug sensitivity of malaria parasites. We characterized ex vivo drug sensitivity and parasite polymorphisms associated with sensitivity in 459 Plasmodium falciparum samples obtained from subjects enrolled in two clinical trials in Tororo, Uganda, from 2010 to 2013. Sensitivities to chloroquine and monodesethylamodiaquine varied widely; sensitivities to quinine, dihydroartemisinin, lumefantrine, and piperaquine were generally good. Associations between ex vivo drug sensitivity and parasite polymorphisms included decreased chloroquine and monodesethylamodiaquine sensitivity and increased lumefantrine and piperaquine sensitivity with pfcrt 76T, as well as increased lumefantrine sensitivity with pfmdr1 86Y, Y184, and 1246Y. …
Development Of Non-Traditional Platinum Anticancer Agents: Trans-Platinum Planar Amine Compounds And Polynuclear Platinum Compounds, Daniel E. Lee
Development Of Non-Traditional Platinum Anticancer Agents: Trans-Platinum Planar Amine Compounds And Polynuclear Platinum Compounds, Daniel E. Lee
Theses and Dissertations
Development of Non-Traditional Platinum Anticancer Agents: trans-Platinum Planar Amine Compounds and Polynuclear Platinum Compounds
By Daniel E. Lee, Ph.D.
A dissertation submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy at Virginia Commonwealth University.
Virginia Commonwealth University, 2015
Major Director: Nicholas P Farrell, Ph.D., Professor, Department of Chemistry
Platinum anticancer compounds with cis geometry, similar to cisplatin, have been explored to circumvent the cisplatin resistance; however, they were not considered broadly active in cisplatin cells due to exhibiting similar or same cell death mechanism as cisplatin. Platinum compounds with trans geometry were less studied …