Tumor-Targeting Fluorinated Phthalocyanines For Theranostic Applications, 2018 Seton Hall University
Tumor-Targeting Fluorinated Phthalocyanines For Theranostic Applications, Erik Nathaniel Carrión
Seton Hall University Dissertations and Theses (ETDs)
Hydrocarbon-based therapeutics and imaging agents are prone to chemical oxidation and degradation resulting in loss of activity and limited functional utility. Thus, more material is required to achieve long-lasting therapeutic effects. Phthalocyanines (Pcs) and their metal complexes (PcMs) can be utilized as prodrugs requiring only renewable energy resources namely, air and light, for cancer therapy and diagnostic (theranostic) applications related to photodynamic therapy (PDT). Replacement of labile C-H bonds in the Pc scaffold with a combination of fluoro and perfluoroisopropyl groups has resulted in a stable yet reactive oxidation catalyst of biological significance and importance. For example, F64PcZn ...
Dissecting Structure-Encoded Determinants Of Allosteric Cross-Talk Between Post-Translational Modification Sites In The Hsp90 Chaperones, Gabrielle Stetz, Amanda Tse, Gennady M. Verkhivker
Mathematics, Physics, and Computer Science Faculty Articles and Research
Post-translational modifications (PTMs) represent an important regulatory instrument that modulates structure, dynamics and function of proteins. The large number of PTM sites in the Hsp90 proteins that are scattered throughout different domains indicated that synchronization of multiple PTMs through a combinatorial code can be invoked as an important mechanism to orchestrate diverse chaperone functions and recognize multiple client proteins. In this study, we have combined structural and coevolutionary analysis with molecular simulations and perturbation response scanning analysis of the Hsp90 structures to characterize functional role of PTM sites in allosteric regulation. The results reveal a small group of conserved PTMs ...
Greer Studies, Teaches How To Improve Medicines, 2018 CUNY Bernard M Baruch College
Greer Studies, Teaches How To Improve Medicines, Aldemaro Romero Jr.
Publications and Research
“As a child, I was interested in asking questions. Like why different substances work the way they do and why they have some effect on our bodies. I was fascinated by hydrogen-peroxide and how it decomposes when you pour it on the wound. I would ask why it happens, what is the reason?” That’s how Dr. Edyta Greer explains how she became interested in science. A native of Poland, Greer received her master’s from Warsaw University and her doctorate from the Graduate Center of the City University of New York. Today she is an associate professor in the ...
Development Of A Novel Carboplatin Like Cytoplasmic Trackable Near Infrared Fluorophore Conjugate Via Strain-Promoted Azide Alkyne Cycloaddition., 2018 Royal College of Surgeons in Ireland
Development Of A Novel Carboplatin Like Cytoplasmic Trackable Near Infrared Fluorophore Conjugate Via Strain-Promoted Azide Alkyne Cycloaddition., Eolann Kitteringham, Dan Wu, Shane Cheung, Brendan Twamley, Donal F. O'Shea, Darren M. Griffith
Pharmaceutical and Medicinal Chemistry Articles
The successful design and pre-clicked synthesis of a non-toxic and cytosol trackable carboplatin-like near infrared fluorophore conjugate via strain-promoted azide alkyne cycloaddition (SPAAC) is reported. Reaction of cis-[Pt(2-azidopropane-1,3-diamine)(cbdca)] (cbdca = cyclobutane-1,1-dicarboxylato) and a bicyclo[6.1.0]non-4-yne near-infrared (NIR) azadipyrromethene fluorophore gave the corresponding clicked Pt-Fluorophore conjugate. The X-ray crystal structure of cis-[Pt(2-azidopropane-1,3-diamine)(cbdca)] was determined featuring the azide on the bidentate 1,3-diaminopropane ligand. The Pt-fluorophore conjugate is the first example of a Pt conjugate clicked via strain-promoted azide alkyne cycloaddition (SPAAC) where the reactive azide handle is on the amine ...
Preparation Of Polymeric Materials From Bio-Renewable Sources, 2018 Rowan University
Preparation Of Polymeric Materials From Bio-Renewable Sources, Jason Douglas Smith
Theses and Dissertations
The focus of this project was to develop methodologies for the preparation of novel polymeric materials from bio-renewable sources. In order to complete this task we needed (a) unfettered access to bio-based materials and ways to convert them to value needed chemicals, as well as, (b) reaction protocols that would allow greater diversity during the synthesis of polymeric compounds so as to affect the properties of these materials.
Our research group has a background in converting plant-based materials like cellulose into value added chemicals employing catalytic reactions. The polymerization of these monomers was then conducted utilizing the Baylis-Hillman reaction. The ...
Comparison Of Partially And Fully Chemically-Modified Sirna In Conjugate-Mediated Delivery In Vivo, 2018 University of Massachusetts Medical School
Comparison Of Partially And Fully Chemically-Modified Sirna In Conjugate-Mediated Delivery In Vivo, Matthew R. Hassler, Anton A. Turanov, Julia F. Alterman, Reka A. Haraszti, Andrew H. Coles, Maire F. Osborn, Dimas Echeverria, Mehran Nikan, William E. Salomon, Loic Roux, Bruno M. D. C. Godinho, Sarah M. Davis, David V. Morrissey, Phillip D. Zamore, S. Ananth Karumanchi, Melissa J. Moore, Neil Aronin, Anastasia Khvorova
Open Access Articles
Small interfering RNA (siRNA)-based drugs require chemical modifications or formulation to promote stability, minimize innate immunity, and enable delivery to target tissues. Partially modified siRNAs (up to 70% of the nucleotides) provide significant stabilization in vitro and are commercially available; thus are commonly used to evaluate efficacy of bio-conjugates for in vivo delivery. In contrast, most clinically-advanced non-formulated compounds, using conjugation as a delivery strategy, are fully chemically modified (100% of nucleotides). Here, we compare partially and fully chemically modified siRNAs in conjugate mediated delivery. We show that fully modified siRNAs are retained at 100x greater levels in various ...
Discovery And Development Of A Three-Component Oxidopyrylium Cycloaddition And Its Application Towards Alpha-Hydroxytropolone Synthesis, 2018 The Graduate Center, City University of New York
Discovery And Development Of A Three-Component Oxidopyrylium Cycloaddition And Its Application Towards Alpha-Hydroxytropolone Synthesis, Michael P. D'Erasmo
All Dissertations, Theses, and Capstone Projects
Historically, natural products have provided unique research opportunities and challenges for organic synthesis, chemical biology, and medicinal chemistry due to their molecular complexity and effects on physiological systems. The total synthesis of natural products has not only produced novel reaction methods and strategies capable of efficiently generating complex structural motifs but also granted access to sufficient quantities of otherwise scarce natural product material for clinical evaluation. These synthetic efforts have facilitated the formation of a transdisciplinary partnership between chemistry, biology, and medicine that has been paramount in elucidating the chemical and pharmaceutical utility of natural products. Chapter I of this ...
A High Throughput Approach For The Generation Of Orthogonally Interacting Protein Pairs, 2018 University of Nebraska-Lincoln
A High Throughput Approach For The Generation Of Orthogonally Interacting Protein Pairs, Justin Lawrie, Xi Song, Wei Niu, Jiantao Guo
Faculty Publications -- Chemistry Department
In contrast to the nearly error-free self-assembly of protein architectures in nature, artificial assembly of protein complexes with pre-defined structure and function in vitro is still challenging. To mimic nature’s strategy to construct pre-defined three-dimensional protein architectures, highly specific proteinprotein interacting pairs are needed. Here we report an effort to create an orthogonally interacting protein pair from its parental pair using a bacteria-based in vivo directed evolution strategy. This high throughput approach features a combination of a negative and a positive selection. The newly developed negative selection from this work was used to remove any protein mutants that retain ...
Synthesis And Functionalization Of Virus-Mimicking Cationic Block Copolymers With Pathogen-Associated Carbohydrates As Potential Vaccine Adjuvants, J. R. Adams, M. Goswami, N. L.B. Pohl, Surya K. Mallapragada
Surya K. Mallapragada
We report the synthesis of a family of amphiphilic pentablock polymers with different cationic blocks and with controlled architectures as potential vaccine carriers for subunit vaccines. The temperature and pH-dependent micellization and gelation of these pentablock copolymers can provide a depot for sustained protein and gene delivery. The amphiphilic central triblock promotes cellular endocytosis, good gene delivery and has been used effectively as a vaccine adjuvant. The pentablock copolymer outer blocks condense DNA spontaneously as a result of electrostatic interactions for sustained combinational therapy. This family of polymers with different cationic groups was evaluated based on DNA complexation-ability and cytotoxicity ...
E‑Cigarette Airflow Rate Modulates Toxicant Profiles And Can Lead To Concerning Levels Of Solvent Consumption, 2018 Portland State University
E‑Cigarette Airflow Rate Modulates Toxicant Profiles And Can Lead To Concerning Levels Of Solvent Consumption, Tetiana Korzun, Maryana Lazurko, Tetiana Korzun, Ian Munhenzva, Kelley Barsanti, Yilin Huang, R. Paul Jensen, Jorge O. Escobedo, Wentai Luo, David H. Peyton, Robert M. Strongin
Chemistry Faculty Publications and Presentations
Electronic cigarettes enabling enhanced airflow have grown in popularity in recent years. The objective of this study is to show that flow rates modulate the levels of specific aerosol toxicants produced in electronic cigarettes. Flow rates used in various laboratory investigations involving e-cigarettes have varied widely to date, and can thus promote interlaboratory variability in aerosol product profiles. The thermal decomposition of hydroxyacetone and glycolaldehyde is less favorable at lower temperatures, supporting the observations of these products at higher flow rates/lower heating coil temperatures. Higher temperatures promote the formation of acetaldehyde from hydroxyacetone and formaldehyde from both hydroxyacetone and ...
Effects Of Floral Phytochemicals On Growth And Evolution Of A Parasite Of Bumble Bees, 2018 University of Massachusetts Amherst
Effects Of Floral Phytochemicals On Growth And Evolution Of A Parasite Of Bumble Bees, Evan Palmer-Young
Background: Nectar and pollen are rich in phytochemicals, some of which can reduce disease in pollinators, including agriculturally important honey and bumble bees. Floral phytochemicals could influence the ecological and evolutionary relationships between plants, their pollinators, and parasites that cause pollinator disease. Antiparasitic effects of phytochemicals could be exploited to ameliorate pollinator disease and decline, and thereby sustain pollinator-dependent agricultural production. However, prior studies showed variable effects of phytochemicals on infection in live bees, where differences in bee genotype, abiotic conditions, and parasite strain could influence results.
Approach: I used cell cultures of the intestinal trypanosome parasite of bumble bees ...
The Forensic Characterization Of Bacterial And Fungal Organisms In Traditional Chinese Medicine, 2018 Virginia Commonwealth University
The Forensic Characterization Of Bacterial And Fungal Organisms In Traditional Chinese Medicine, Julia Grzymkowski, Christopher J. Ehrhardt, Justin L. Poklis, Michelle R. Peace
Undergraduate Research Posters
There has been an increase in use of Traditional Chinese Medicine (TCM) in the United States because they are less expensive and believed to be more effective with less adverse effects in comparison to traditional pharmaceutics. Therefore, sales have increased in the US, despite articles and case studies demonstrating the dangers, such as injury and death, related to TCM, stemming from improper labelling, toxic contaminants, and, in some cases, the presence of pathogenic bacteria. The aim of this study was to perform a survival experiment to demonstrate the importance of proper herbal brewing technique and to conduct a molecular and ...
Crystallographic,Vibrational Modes And Optical Properties Data Of Α-Dipabcrystal, 2018 Jordan University of Science and Technology
Crystallographic,Vibrational Modes And Optical Properties Data Of Α-Dipabcrystal, Ahmad Alsaad, Chris M. Marin, Nabil Alaqtash, Hsien-Wen Chao, Tsun-Hsu Chang, Chin Li Cheung, A. Ahmad, I. A. Qattan, Renat F. Sabirianov
Faculty Publications -- Chemistry Department
The Crystallographic data of the α-DIPAB sample was measured using powder X-ray diffraction (PXRD). The crystal structure was also optimized using density functional based method. The calculations were performed both including vander Waals (vdW) interactions and excluding them to quantify the effects of vdW interaction on the crystal formation. The vibrational modes of DIPAB crystal corresponding to the Bromine deficient samples are calculated and presented. These show the origin of drastic change in dielectric response in Br deficient samples as compared to the ideal stoichiometric DIPAB crystal (Alsaad et al. 2018) . Optical properties of an ideal α-DIPAB were calculated ...
Metformin, 2018 Parkland College
Metformin, Andrea Frizzell
Natural Sciences Poster Sessions
This poster for the Natural Sciences Poster Session at Parkland College displays chemical information about the drug Metformin (Fortamet, Glucophage, Gumetza, Riomet), used for the treatment of diabetes, suppressing the production of glucose and aiding int he absorption of insulin, with unlabeled uses as treatment for antipsychotic induced weight gain and polycystic ovary syndrome.
Application Of The Sandmeyer Reaction Towards Synthesis Of Selectivetoll-Like Receptor 7 & 8 Antagonists, 2018 University of Colorado, Boulder
Application Of The Sandmeyer Reaction Towards Synthesis Of Selectivetoll-Like Receptor 7 & 8 Antagonists, Rachel Anderson
Undergraduate Honors Theses
Toll-like receptors (TLRs) are an important part of the innate immune system responsible for detecting signs of microbial invasion and cell damage and initiating the immune response. Overactivation of TLRs, presumably by inappropriate detection of endogenous ligands, has been linked to chronic inflammation and autoimmunity. Current therapeutics are broad-spectrum and inhibit the overall function of the immune system. In this work, a library of dual-TLR7/8 antagonists were prepared with the goal of engineering TLR7 specificity, then tested against HEK 293 cells expressing either TLR 7 or 8. An antagonist with IC50 0.22 ± 0.33 μM against TLR 8 ...
Structural Determination Of The Broadly Reactive Anti-Ighv1-69 Anti-Idiotypic Antibody G6 And Its Idiotope, 2017 Harvard Medical School
Structural Determination Of The Broadly Reactive Anti-Ighv1-69 Anti-Idiotypic Antibody G6 And Its Idiotope, Yuval Avnir, Kristina L. Prachanronarong, Shurong Hou, Brendan J. Hilbert, Markus-Frederik Bohn, Timothy F. Kowalik, Robert W. Finberg, Jennifer P. Wang, Nese Kurt Yilmaz, Celia A. Schiffer, Wayne A. Marasco
Schiffer Lab Publications
The heavy chain IGHV1-69 germline gene exhibits a high level of polymorphism and shows biased use in protective antibody (Ab) responses to infections and vaccines. It is also highly expressed in several B cell malignancies and autoimmune diseases. G6 is an anti-idiotypic monoclonal Ab that selectively binds to IGHV1-69 heavy chain germline gene 51p1 alleles that have been implicated in these Ab responses and disease processes. Here, we determine the co-crystal structure of humanized G6 (hG6.3) in complex with anti-influenza hemagglutinin stem-directed broadly neutralizing Ab D80. The core of the hG6.3 idiotope is a continuous string of CDR-H2 ...
Directed Self-Assembly Of Fluorescence Responsive Nanoparticles And Their Use For Real-Time Surface And Cellular Imaging., 2017 Royal College of Surgeons in Ireland
Directed Self-Assembly Of Fluorescence Responsive Nanoparticles And Their Use For Real-Time Surface And Cellular Imaging., Shane Cheung, Donal F. O'Shea
Pharmaceutical and Medicinal Chemistry Articles
Directed self-assemblies in water are known as the most efficient means of forming complex higher ordered structures in nature. Here we show a straightforward and robust method for particle assembly which utilises the amphiphilic tri-block co-polymer poloxamer-188 and a hydrophobic fluorophore as the two designer components, which have a built-in ability to convey spatial and temporal information about their surroundings to an observer. Templating of particle self-assembly is attributed to interactions between the fluorophore and hydrophobic segment of the poloxamer. Particle fluorescence in water is quenched but can be induced to selectively switch on in response to temperature, surface adsorption ...
Green Chemistry Oxidative Modification Of Peptoids Utilizing Bleach And Tempo, 2017 University of Arkansas, Fayetteville
Green Chemistry Oxidative Modification Of Peptoids Utilizing Bleach And Tempo, Jesse Leland Roberts
Theses and Dissertations
Biotherapeutic drugs, derived from biological molecules such as proteins and DNA, are becoming an integral and exceptionally critical aspect of modern medicine. Compared to common pharmaceutical drugs, biotherapeutics are much larger in size and have greater target specificity, allowing them to treat many chronic diseases ranging from cancer to rheumatoid arthritis. The major issue with protein based therapeutics is that they readily undergo proteolysis, or enzymatic degradation, when administered through subcutaneous injections. Traditionally, biotherapeutic modification procedures have centered on the use of PEG derivatives. This process, called PEGylation, is unfavorable due to the increases in molecular weights of the proteins ...
Substituted Hydroxylamines As Nitrogen Transfer Reagents: Direct Synthetic Pathways To Structurally Rich Heteroatomic Scaffolds, Dylan John Quinn
Theses and Dissertations
Nitrogen is found in virtually all valuable chemical compounds. The abundance of atmospheric nitrogen however, is rendered inaccessible because of the strong N-N triple bond, ultimately preventing its practical utilization in synthetic organic synthesis. The development of powerful nitrogen transfer reagents, such as substituted hydroxylamine derivatives, have played an important role in the introduction of nitrogen into valuable chemical scaffolding.
Herein is reported the methodological development of synthetic nitrogen placement into a range of valuable heteroatomic compounds. This work shows that O-Substituted Hydroxylamine can be used to furnish small heteroatomic compounds, particularly nitriles. Whereas, N-Substituted Hydroxylamine can be employed to ...
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 ...