Ensemble-Based Modeling And Rigidity Decomposition Of Allosteric Interaction Networks And Communication Pathways In Cyclin-Dependent Kinases: Differentiating Kinase Clients Of The Hsp90-Cdc37 Chaperone, 2017 Chapman University
Ensemble-Based Modeling And Rigidity Decomposition Of Allosteric Interaction Networks And Communication Pathways In Cyclin-Dependent Kinases: Differentiating Kinase Clients Of The Hsp90-Cdc37 Chaperone, Gabrielle Stetz, Amanda Tse, Gennady M. Verkhivker
Mathematics, Physics, and Computer Science Faculty Articles and Research
The overarching goal of delineating molecular principles underlying differentiation of protein kinase clients and chaperone-based modulation of kinase activity is fundamental to understanding activity of many oncogenic kinases that require chaperoning of Hsp70 and Hsp90 systems to attain a functionally competent active form. Despite structural similarities and common activation mechanisms shared by cyclin-dependent kinase (CDK) proteins, members of this family can exhibit vastly different chaperone preferences. The molecular determinants underlying chaperone dependencies of protein kinases are not fully understood as structurally similar kinases may often elicit distinct regulatory responses to the chaperone. The regulatory divergences observed for members of CDK ...
Progress Toward Phidianidine Analogues Containing A 1,2,3-Triazole Ring, 2017 Coastal Carolina University
Progress Toward Phidianidine Analogues Containing A 1,2,3-Triazole Ring, David Laws Iii, Dillon King, Bryan H. Wakefield
Journal of the South Carolina Academy of Science
Phidianidines are a class of compound that has been extracted from the sea mollusk Phidianis militaris. These compounds have been shown to exhibit a variety of useful properties such as antihistamine effects, anti-cancer activity, agonism of the µ-opioid receptor and neuroprotection. The biological activities are thought to be caused by the 1,2,4- oxadiazole ring found within the molecule. The goal of this project is to synthesize analogues of phidianidine that contain a 1,2,3-triazole instead of the 1,2,4 oxadiazole ring using a method that will allow for other regions of the molecule to be changed ...
Platinum(Iv) Oxaliplatin-Peptide Conjugates Targeting Memhsp70+ Phenotype In Colorectal Cancer Cells., 2017 Royal College of Surgeons in Ireland
Platinum(Iv) Oxaliplatin-Peptide Conjugates Targeting Memhsp70+ Phenotype In Colorectal Cancer Cells., Aoife M. Mckeon, Janis Noonan, Marc Devocelle, Brona M. Murphy, Darren M. Griffith
Pharmaceutical and Medicinal Chemistry Articles
Novel Pt(iv) tumour penetrating peptide (TPP) conjugates are reported. They are the first example of metallodrugs to target a membrane bound heat shock protein 70 positive (memHSP70+) phenotype in cancer cells. The conjugates exhibit superior cytotoxicity as compared to oxaliplatin alone in Pt resistant colorectal cancer cells with relatively high memHSP70+ expression. Substitution of TPP in Pt(iv) peptide conjugates with scrambled peptide (ScP) essentially abolishes the observed cytotoxicity.
Development Of Novel Alkaloid Derivatives For The Treatment Of Chronic Myeloid Leukemia, 2017 Rowan University
Development Of Novel Alkaloid Derivatives For The Treatment Of Chronic Myeloid Leukemia, Lindsay Michelle Renn
Theses and Dissertations
The majority of chronic myeloid leukemia (CML) patients can be treated with and respond to imatinib mesylate (Gleevec). Imatinib is known to inhibit BCR-ABLl kinase activity, and is effective for the treatment of the majority of CML patients. Multiple mutations have been found in patients resistant to imatinib treatment, including many located in the BCR-ABLl tyrosine kinase domain (e.g. E255K and T315I). Matrine is a bioactive alkaloid from Sophora flavescens and has been shown to inhibit several types of cancers and is used in Chinese medicine. The goal of this study is to develop new matrine derivatives that inhibit ...
Nonlinear Oscillatory Dynamics Of The Hardening Of Calcium Phosphate Bone Cements, 2017 Chapman University
Nonlinear Oscillatory Dynamics Of The Hardening Of Calcium Phosphate Bone Cements, Vuk Uskoković, Julietta V. Rau
Pharmacy Faculty Articles and Research
Here we report on the nonlinear, oscillatory dynamics detected in the evolution of phase composition during the setting of different calcium phosphate cements, two of which evolved toward brushite and one toward hydroxyapatite as the final product. Whereas both brushite-forming cements contained iondoped b-tricalcium phosphate as the initial phase, the zinc-containing one yielded scholzite as an additional phase during setting and the oscillations between these two products were pronounced throughout the entire 80 h setting period, long after the hardening processes was over from the mechanical standpoint. Oscillations in the copper-containing system involved the amount of brushite as the main ...
Crystal Engineering Of Active Pharmaceutical Ingredients With Low Aqueous Solubility And Bioavailability, 2017 The University of Western Ontario
Crystal Engineering Of Active Pharmaceutical Ingredients With Low Aqueous Solubility And Bioavailability, Jenna M. Skieneh
Electronic Thesis and Dissertation Repository
Approximately 75% of new molecular entities approved by the Food and Drug Administration (FDA) for use in the pharmaceutical industry are found to have poor aqueous solubility. This undesirable attribute leads to consequences such as higher doses required to reach therapeutic levels, greater vulnerability to food effects, lesser fraction absorbed in the small intestine and damage to the environment due to increased quantity of excretion. The addition of an excipient (i.e. a FDA approved inactive ingredient) to the molecular structure of an active pharmaceutical ingredient (API) through intermolecular bonding is of growing interest because the properties of the API ...
Development Of Entrapment Columns For The Study Of Affinity Based Analysis Of Drug-Protein Interactions, 2017 University of Nebraska-Lincoln
Development Of Entrapment Columns For The Study Of Affinity Based Analysis Of Drug-Protein Interactions, Shiden T. Azaria
Student Research Projects, Dissertations, and Theses - Chemistry Department
High-performance affinity chromatography (HPAC) is a type of liquid chromatography in which solutes are separated based on their binding to a stationary phase that is a biologically-related agent. Because of the strong and selective nature of many biological interactions, this method has already become a powerful technique for the purification and analysis of solutes that are complementary to the immobilized binding agent. Human serum albumin (HSA), the most abundant protein in the blood with concentrations of 35-50 mg/mL in serum, has interactions with many drugs, which can affect the absorption, distribution, metabolism and excretion of such agents.
The overall ...
Cellular And Molecular Targets Of Menthol Actions, 2017 UAE University
Cellular And Molecular Targets Of Menthol Actions, Murat Oz, Eslam El Nebrisi, Keun-Hang Susan Yang, Frank Christopher Howarth, Lina T. Al Kury
Mathematics, Physics, and Computer Science Faculty Articles and Research
Menthol belongs to monoterpene class of a structurally diverse group of phytochemicals found in plant-derived essential oils. Menthol is widely used in pharmaceuticals, confectionary, oral hygiene products, pesticides, cosmetics, and as a flavoring agent. In addition, menthol is known to have antioxidant, anti-inflammatory, and analgesic effects. Recently, there has been renewed awareness in comprehending the biological and pharmacological effects of menthol. TRP channels have been demonstrated to mediate the cooling actions ofmenthol. There has been new evidence demonstrating thatmenthol can significantly influence the functional characteristics of a number of different kinds of ligand and voltage-gated ion channels, indicating that at ...
Dengue Virus Ns2b/Ns3 Protease Inhibitors Exploiting The Prime Side, 2017 University of Massachusetts Medical School
Dengue Virus Ns2b/Ns3 Protease Inhibitors Exploiting The Prime Side, Kuan-Hung Lin, Akbar Ali, Linah Rusere, Djade I. Soumana, Nese Kurt Yilmaz, Celia A. Schiffer
Celia A. Schiffer
The mosquito-transmitted dengue virus (DENV) infects millions of people in tropical and subtropical regions. Maturation of DENV particles requires proper cleavage of the viral polyprotein, including processing of 8 of the 13 substrate cleavage sites by dengue virus NS2B/NS3 protease. With no available direct-acting antiviral targeting DENV, NS2/NS3 protease is a promising target for inhibitor design. Current design efforts focus on the nonprime side of the DENV protease active site, resulting in highly hydrophilic and nonspecific scaffolds. However, the prime side also significantly modulates DENV protease binding affinity, as revealed by engineering the binding loop of aprotinin, a ...
Interdependence Of Inhibitor Recognition In Hiv-1 Protease, 2017 University of Massachusetts Medical School
Interdependence Of Inhibitor Recognition In Hiv-1 Protease, Janet L. Paulsen, Florian Leidner, Debra A. Ragland, Nese Kurt Yilmaz, Celia A. Schiffer
Celia A. Schiffer
Molecular recognition is a highly interdependent process. Subsite couplings within the active site of proteases are most often revealed through conditional amino acid preferences in substrate recognition. However, the potential effect of these couplings on inhibition and thus inhibitor design is largely unexplored. The present study examines the interdependency of subsites in HIV-1 protease using a focused library of protease inhibitors, to aid in future inhibitor design. Previously a series of darunavir (DRV) analogs was designed to systematically probe the S1' and S2' subsites. Co-crystal structures of these analogs with HIV-1 protease provide the ideal opportunity to probe subsite interdependency ...
Cytotoxicity Of Platinum Anticancer Drugs In Mammalian Cell Lines Of Metastatic Cancer, 2017 Western Kentucky University
Cytotoxicity Of Platinum Anticancer Drugs In Mammalian Cell Lines Of Metastatic Cancer, Hosannah Evie
Honors College Capstone Experience/Thesis Projects
With the invention of advanced technology, focus has been put on understanding and looking for potential cures for many diseases, one of which is cancer. The difference in the leaving and non-leaving ligands of the FDA approved cancer drugs contributes to the differential cell specific cytotoxic effects. These drugs such as oxaliplatin approved for colorectal cancer, cisplatin approved for testicular cancer, and their analogs were used to treat different cancer cell lines in an MTT assay. This project aims to determine how changing the molecular shape of these compounds affects their uptake and toxicity into different cell lines. The assay ...
Solid-Phase Peptide Synthesis Of Analogues Of The N-Terminus A-Ring Fragment Of The Lantibiotic Nisin: Replacements For The Dehydroalanine (Dha) Residue At Position 5 And The First Incorporation Of A Thioamide Residue, 2017 Institute of Technology Tallaght
Solid-Phase Peptide Synthesis Of Analogues Of The N-Terminus A-Ring Fragment Of The Lantibiotic Nisin: Replacements For The Dehydroalanine (Dha) Residue At Position 5 And The First Incorporation Of A Thioamide Residue, Kim Manzor, Keith Ó Proinsias, Fintan Kelleher
A number of A-ring analogues of the lantibiotic nisin, containing replacements for the Dha at position 5, have been successfully prepared by solid-phase peptide synthesis. The Dha replacements include glycine, alanine, phenylalanine, serine and 1-aminocyclopropyl carboxylic acid (ACCa). The incorporation of a thioamide-isoleucine residue at position 4 is also described and is the first report of the preparation of a lantibiotic ring fragment containing a thioamide link.
Development Of Novel Therapeutic Approaches: (I) Targeting Allergic Responses To Peanuts And (Ii) Inhibition Of Dpp-Iv Enzyme Involved In Diabetes, Savan V. Patel
Theses and Dissertations
There is an increase in prevalence of peanut allergy, especially in the western world. The only current treatment for peanut allergy is avoidance of peanut from diet and contact. Additionally, there is currently no specific vaccine that can be taken to decrease peanut allergies. The method of desensitizing a person allergic to peanut allergy is deemed unsafe as the smallest amount of peanut can trigger an anaphylaxis reaction. Thus, various allergoids were created by modifying major peanut protein allergen Ara h2 using various cross-linkers and modification agents in order to disrupt the binding surface epitopes of the antigen to antibody ...
Synthesis And Identification Of An Investigational Essential Precursor Compound For The Purpose Of The Development Of A Vaccine Treatment Against The Peanut Allergy, Thomas F. Anguella
Theses and Dissertations
Presented in this master's thesis are several studies carried out to determine the viability of several allergoid candidates utilizing the major peanut allergen Ara h 2. The Ara h 2 allergen protein appears naturally as a doublet when observed by gel electrophoresis, SDS-PAGE. Optimization of allergen purification methods successfully led to Ara h 2 purity, and the ability to standardize procedures to yield consistently pure samples. The purified allergen was chemically crosslinked with diketone derivatives selected for their abilities to react with specific amino acids accessible on the Ara h 2 protein. Chemically modified allergen samples were also evaluated ...
Diverse Stimuli Engage Different Neutrophil Extracellular Trap Pathways, 2017 Max Planck Institute for Infection Biology
Diverse Stimuli Engage Different Neutrophil Extracellular Trap Pathways, Elaine F. Kenny, Alf Herzig, Renate Krüger, Aaron Muth, Santanu Mondal, Paul R. Thompson, Volker Brinkmann, Horst Von Bernuth, Arturo Zychlinsky
Thompson Lab Publications
Neutrophils release neutrophil extracellular traps (NETs) which ensnare pathogens and have pathogenic functions in diverse diseases. We examined the NETosis pathways induced by five stimuli; PMA, the calcium ionophore A23187, nigericin, Candida albicans and Group B Streptococcus. We studied NET production in neutrophils from healthy donors with inhibitors of molecules crucial to PMA induced NETs including protein kinase C, calcium, reactive oxygen species, the enzymes myeloperoxidase (MPO) and neutrophil elastase. Additionally, neutrophils from chronic granulomatous disease patients, carrying mutations in the NADPH oxidase complex or a MPO-deficient patient were examined. We show that PMA, C. albicans and GBS use a ...
Conformational Studies Of Gram-Negative Bacterial Quorum Sensing 3-Oxo N-Acyl Homoserine Lactone Molecules, 2017 Institute of Technology, Tallaght
Conformational Studies Of Gram-Negative Bacterial Quorum Sensing 3-Oxo N-Acyl Homoserine Lactone Molecules, Darren Crowe, Alan Nicholson, Adrienne Fleming, Ed Carey, Goar Sanchez-Sanz, Fintan Kelleher
In their 1H NMR spectra in CDCl3 3-oxo-N-acyl homoserine lactones (OHLs) show significant downfield chemical shifts of the amide N-H proton when compared to the parent N-acyl homoserine lactones (AHLs). NMR spectroscopic and DFT calculation studies have shown that this is most likely due to the presence of a stabilising intramolecular H-bond from the N-H to the 3-oxo group. The 1H NMR spectra also show evidence for the enol tautomers and that the amount of enol present for a range of OHLs is 4.1-4.5% in CDCl3 and 6.5-7.2% in ...
Role Of Peptidylarginine Deiminase 2 (Pad2) In Mammary Carcinoma Cell Migration, 2017 Cornell University
Role Of Peptidylarginine Deiminase 2 (Pad2) In Mammary Carcinoma Cell Migration, Sachi Horibata, Katherine E. Rogers, David Sadegh, Lynne J. Anguish, John L. Mcelwee, Pragya Shah, Paul R. Thompson, Scott A. Coonrod
Thompson Lab Publications
BACKGROUND: Penetration of the mammary gland basement membrane by cancer cells is a crucial first step in tumor invasion. Using a mouse model of ductal carcinoma in situ, we previously found that inhibition of peptidylarginine deiminase 2 (PAD2, aka PADI2) activity appears to maintain basement membrane integrity in xenograft tumors. The goal of this investigation was to gain insight into the mechanisms by which PAD2 mediates this process.
METHODS: For our study, we modulated PAD2 activity in mammary ductal carcinoma cells by lentiviral shRNA-mediated depletion, lentiviral-mediated PAD2 overexpression, or PAD inhibition and explored the effects of these treatments on changes ...
Studies Directed Towards The Iridium Catalyzed Synthesis Of New Carbon-Nitrogen Bonds., 2017 University of New Orleans
Studies Directed Towards The Iridium Catalyzed Synthesis Of New Carbon-Nitrogen Bonds., Maria Lindsay
University of New Orleans Theses and Dissertations
Amines are ubiquitous in nature and serve a variety of functions in living organisms. Because of this fact amines are of great biological and pharmaceutical interest. The iridium catalyst (pentamethylcyclopentadienyl) iridium dichloride dimer ([Cp*IrCl2]2) has been used in a number of ways to synthesize new carbon-nitrogen bonds. These studies were directed toward the development of a method for the iridium catalyzed N-alkylation of alpha-amino acid esters as well as the development of a strategy for synthesis of the natural product 275A.
We have optimized a method for the N-alkylation for alpha-amino acid esters. Using this method, we ...
A Novel Bromodomain And Extra-Terminal Domain Inhibitors (Beti) That Reverses Hiv-1 Latency, 2017 University of Massachusetts Boston
A Novel Bromodomain And Extra-Terminal Domain Inhibitors (Beti) That Reverses Hiv-1 Latency, Shuai Liu, Maxime Jean, Wei Zhang, Jian Zhu
UMass Center for Clinical and Translational Science Research Retreat
Although combinatory antiretroviral therapy (cART) is effective to reduce HIV-1 viremia, it does not eliminate HIV-1 infection. HIV-1 remains latent with the presence of cART, impeding the cure of AIDS. Recently, latency-reversing agents (LRAs) have been developed to purge latent HIV-1, providing an intriguing strategy for eradication of residual, latent viral reservoirs. Our earlier studies show that antagonism of HIV-1 competitive factor bromodomain containing 4 (BRD4) using bromodomain and extra-terminal domain inhibitor (BETi) JQ1 may facilitate the reversal of HIV-1 latency. BETis have recently emerged as a class of compounds that are promising for both the anticancer and HIV-1 latency-reversing ...
Understanding The Dynamic Process Of Dissolution Using In-Situ Ft-Ir Spectroscopy, 2017 Seton Hall University
Understanding The Dynamic Process Of Dissolution Using In-Situ Ft-Ir Spectroscopy, Vrushali M. Bhawtankar
Seton Hall University Dissertations and Theses (ETDs)
Dissolution studies provide valuable and critical drug release information (in vitro) that are important for quality control drug development. Using in-situ FT-IR spectroscopy methods has been developed for analyzing and monitoring dissolutions of pharmaceutical APIs. The accuracy of this technique was found to be ± 3% relative to HPLC and UV/Vis Spectroscopy. A dynamic analysis of the dissolution and subsequent hydrolysis of aspirin has been determined by in-situ FT-IR. This technique allows real-time analysis of the behavior of aspirin under simulated physiological conditions (pH 1.2, 4.5, 6.8) as aspirin (1205 cm-1) and salicylic acid (1388 cm ...