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Articles 1 - 27 of 27
Full-Text Articles in Life Sciences
Integrative Approach For Inference Of Gene Regulatory Networks Using Lasso-Based Random Featuring And Application To Psychiatric Disorders, Dongchul Kim, Mingon Kang, Ashis Biswas, Chunyu Liu
Integrative Approach For Inference Of Gene Regulatory Networks Using Lasso-Based Random Featuring And Application To Psychiatric Disorders, Dongchul Kim, Mingon Kang, Ashis Biswas, Chunyu Liu
Faculty and Research Publications
Background Inferring gene regulatory networks is one of the most interesting research areas in the systems biology. Many inference methods have been developed by using a variety of computational models and approaches. However, there are two issues to solve. First, depending on the structural or computational model of inference method, the results tend to be inconsistent due to innately different advantages and limitations of the methods. Therefore the combination of dissimilar approaches is demanded as an alternative way in order to overcome the limitations of standalone methods through complementary integration. Second, sparse linear regression that is penalized by the regularization …
Virulence Factors Of Aeromonas Hydrophila: In The Wake Of Reclassification, Cody R. Rasmussen-Ivey, Maria J. Figueras, Donald Mcgarey, Mark R. Liles
Virulence Factors Of Aeromonas Hydrophila: In The Wake Of Reclassification, Cody R. Rasmussen-Ivey, Maria J. Figueras, Donald Mcgarey, Mark R. Liles
Faculty and Research Publications
The ubiquitous “jack-of-all-trades,” Aeromonas hydrophila, is a freshwater, Gram-negative bacterial pathogen under revision in regard to its phylogenetic and functional affiliation with other aeromonads. While virulence factors are expectedly diverse across A. hydrophila strains and closely related species, our mechanistic knowledge of the vast majority of these factors is based on the molecular characterization of the strains A. hydrophila AH-3 and SSU, which were reclassified as A. piscicola AH-3 in 2009 and A. dhakensis SSU in 2013. Individually, these reclassifications raise important questions involving the applicability of previous research on A. hydrophila virulence mechanisms; however, this issue is exacerbated by …
Functional Diversity Of Small And Large Trees Along Secondary Succession In A Tropical Dry Forest, Lucía Sanaphre-Villanueva, Juan Manuel Dupuy, José Luis Andrade, Casandra Reyes-García, Horacio Paz, Paula C. Jackson
Functional Diversity Of Small And Large Trees Along Secondary Succession In A Tropical Dry Forest, Lucía Sanaphre-Villanueva, Juan Manuel Dupuy, José Luis Andrade, Casandra Reyes-García, Horacio Paz, Paula C. Jackson
Faculty and Research Publications
Functional Diversity is considered an important driver of community assembly in environmental and successional gradients. To understand tree assembly processes in a semideciduous tropical forest, we analyzed the variation of Functional Richness (FRic), Functional Divergence (FDiv), and Functional Evenness (FEve) of small vs. large trees in relation to fallow age after slash-and-burn agriculture and topographical position (flat sites vs. hills). FRic of small trees was lower than null model predicted values across the successional gradient, and decreased unexpectedly in older successional ages. FRic of large trees was higher than null model predictions early in succession and lower in late-successional stands …
The Effects Of Δ9-Tetrahydrocannabinol (Thc) On Development And Hyperekplexia In Embryonic Zebrafish Model, Olivia Christine Mistretta
The Effects Of Δ9-Tetrahydrocannabinol (Thc) On Development And Hyperekplexia In Embryonic Zebrafish Model, Olivia Christine Mistretta
Master of Science in Integrative Biology Theses
Marijuana is one of the most commonly used illicit drugs around the world. It has gained attention as an alternative medicine to many different disorders. Though initially investigated in modern medicine for its analgesic and antiemetic properties, cannabis has been recently found to benefit numerous neurological disorders. Though there are over 100 different cannabinoids produced by the cannabis plant, Δ9 – tetrahydrocannabinol (THC) has been shown to the most efficacious phytocannabinoid in neurological disorders. THC has been shown in numerous previous studies to be effective at treating spasticity caused by multiple sclerosis and spinal cord injury, as well as …
Identification Of Preferred Dna-Binding Sites For The Thermus Thermophilus Transcriptional Regulator Sbtr By The Combinatorial Approach Repsa, Michael W. Van Dyke, Matthew D. Beyer, Emily Clay, Jonathan L. Mcmurry
Identification Of Preferred Dna-Binding Sites For The Thermus Thermophilus Transcriptional Regulator Sbtr By The Combinatorial Approach Repsa, Michael W. Van Dyke, Matthew D. Beyer, Emily Clay, Jonathan L. Mcmurry
Faculty and Research Publications
One of the first steps towards elucidating the biological function of a putative transcriptional regulator is to ascertain its preferred DNA-binding sequences. This may be rapidly and effectively achieved through the application of a combinatorial approach, one involving very large numbers of randomized oligonucleotides and reiterative selection and amplification steps to enrich for high-affinity nucleic acid-binding sequences. Previously, we had developed the novel combinatorial approach Restriction Endonuclease Protection, Selection and Amplification (REPSA), which relies not on the physical separation of ligand-nucleic acid complexes but instead selects on the basis of ligand-dependent inhibition of enzymatic template inactivation, specifically cleavage by type …
Comparisons Of The Socio-Behavioral Differences Between Chimpanzees (Pan Troglodytes) And Bonobos (Pan Paniscus), Investigating The Impact Of A Naturally Occurring Polymorphic Microsatellite Deletion In The 5’ Flanking Region Of Arginine Vasopressin Receptor 1a (Avpr1a) On Gene Expression And Sociality Within The Pan Genus, Robert E. Evans
Master of Science in Integrative Biology Theses
Among the great apes, chimpanzees are unique in having a polymorphic deletion of a ~350bp microsatellite containing region (DupB) in the 5’ flanking region of the arginine vasopressin receptor 1a (AVPR1a) gene. This results in three genotypes (DupB+/+, DupB+/- and DupB-/-) of AVPR1a in chimpanzees. Variations in the length of microsatellites 5’ of AVPR1a have been associated with social behaviors (pair-bonding, paternal care, degree of social interest) and differential levels of expression of AVPR1a in the brains of voles. The polymorphic DupB microsatellite in chimpanzees allows the investigation of microsatellite variation 5’ of AVPR1a in higher order primates. We hypothesized …
Induced Phytoextraction Of Lead From Contaminated Soils By Panicum Virgatum, Enhanced With Edta, Citric Acid, Benomyl, Propiconazole And Nitric Oxide, Adrianna E. Beavers
Induced Phytoextraction Of Lead From Contaminated Soils By Panicum Virgatum, Enhanced With Edta, Citric Acid, Benomyl, Propiconazole And Nitric Oxide, Adrianna E. Beavers
Master of Science in Integrative Biology Theses
Soil lead (Pb) contamination represents a major environmental and public health risk. Conventional Pb remediation methods are typically expensive and risk further environmental damage. Phytoextraction has emerged as an alternative heavy metal remediation method with the potential for reducing both economic cost and negative environmental effects. For this study, North American native switchgrass (Panicum virgatum) was chosen due to its ability to achieve high biomass yields across a variety of climates and environmental conditions. The switchgrass plants in this study were treated with chemical chelates, fungal suppressants, and nitric oxide (NO) donors with the intent of optimizing Pb …
Distances Between Species In Food Webs: Evaluating Alternative Metrics' Predictive Power, Molly C. Johnson
Distances Between Species In Food Webs: Evaluating Alternative Metrics' Predictive Power, Molly C. Johnson
Master of Science in Integrative Biology Theses
The complexity of ecological systems makes it difficult to predict how one species will react to the disturbance of another. Complex systems of species’ interactions can be described as ecological networks. One way in which ecological networks can give information concerning one species’ response to the perturbation of another is through the quantification of species’ proximity to one another in the network. In this study, we evaluate communicability, a topological metric that accounts for all of the direct and indirect interactions between species in a food web without additional information concerning the strengths of species interactions. Communicability is then compared …
The Effects Of Amphetamine Exposure On Neurodevelopment And Behavior In Early Life Stages Of Danio Rerio, Jennifer D. Bullard
The Effects Of Amphetamine Exposure On Neurodevelopment And Behavior In Early Life Stages Of Danio Rerio, Jennifer D. Bullard
Master of Science in Integrative Biology Theses
Amphetamines are frequently prescribed to young children for attention deficit hyperactivity disorder (ADHD). Due to the recent rise in ADHD diagnoses and the resulting increase in amphetamine intake in children, we investigated how amphetamine exposure impacts the development of stereotyped behaviors and the neural circuit that governs these behaviors. The zebrafish (Danio rerio) was used as our model organism because of the extensively studied developmental milestones these fish provide. Using escape responses as a behavior model, we exposed embryos to three doses of amphetamine (10 μg/ml, 20 μg/ml, and 30 μg/ml) environmentally during the first 48 hours of …
Conservation Genetics And Mark-Recapture Monitoring Of The Rare Pigeon Mountain Salamander (Plethodon Petraeus) Within A Highly Restricted Range, Kate Donlon
Master of Science in Integrative Biology Theses
Globally, amphibian species are experiencing declines at an alarming rate largely due to habitat loss, disease and climate change. Species with limited ranges are at an elevated risk of a significant decline in population numbers and extinction because of the inability to avoid and recover from these impacts. Long-term management plans are critical for conservation of species with small ranges; however, the knowledge required to develop effective plans is absent from the literature for many species. One such species is the Pigeon Mountain Salamander. The distribution of the Pigeon Mountain Salamander, Plethodon petraeus, is restricted to roughly 17 kilometers …
The Effect Of Post-Resistance Exercise Amino Acids On Plasma Mcp-1 And Ccr2 Expression, Adam J. Wells, Jay R. Hoffman, Adam R. Jajtner, Alyssa N. Varanoske
The Effect Of Post-Resistance Exercise Amino Acids On Plasma Mcp-1 And Ccr2 Expression, Adam J. Wells, Jay R. Hoffman, Adam R. Jajtner, Alyssa N. Varanoske
Faculty and Research Publications
The recruitment and infiltration of classical monocytes into damaged muscle is critical for optimal tissue remodeling. This study examined the effects of an amino acid supplement on classical monocyte recruitment following an acute bout of lower body resistance exercise. Ten resistance-trained men (24.7 ˘ 3.4 years; 90.1 ˘ 11.3 kg; 176.0 ˘ 4.9 cm) ingested supplement (SUPP) or placebo (PL) immediately post-exercise in a randomized, cross-over design. Blood samples were obtained at baseline (BL), immediately (IP), 30-min (30P), 1-h (1H), 2-h (2H), and 5-h (5H) post-exercise to assess plasma concentrations of monocyte chemoattractant protein 1 (MCP-1), myoglobin, cortisol and insulin …
Comparison Of High-Intensity Vs. High-Volume Resistance Training On The Bdnf Response To Exercise, David D. Church, Jay R. Hoffman, Gerald T. Mangine, Adam R. Jajtner
Comparison Of High-Intensity Vs. High-Volume Resistance Training On The Bdnf Response To Exercise, David D. Church, Jay R. Hoffman, Gerald T. Mangine, Adam R. Jajtner
Faculty and Research Publications
This study compared the acute and chronic response of circulating plasma brain-derived neurotrophic factor (BDNF) to high-intensity low-volume (HI) and low-intensity high volume (HV) resistance training. Twenty experienced resistance-trained men (23.5 ± 2.6 y, 1.79 ± 0.05 m, 75.7 ± 13.8 kg) volunteered for this study. Before the resistance training program (PRE), participants performed an acute bout of exercise using either the HI [3-5 reps; 90% of one repetition maximum (1RM)] or HV (10–12 reps; 70% 1RM) training paradigm. The acute exercise protocol was repeated after 7 wk of training (POST). Blood samples were obtained at rest (BL), immediately (IP), …
The Sh3 Domain Of Unc-89 (Obscurin) Interacts With Paramyosin, A Coiled-Coil Protein, In Caenorhabditis Elegans Muscle, Hiroshi Qadota, Jonathan Mcmurry, Verra M. Ngwa, Et Al.
The Sh3 Domain Of Unc-89 (Obscurin) Interacts With Paramyosin, A Coiled-Coil Protein, In Caenorhabditis Elegans Muscle, Hiroshi Qadota, Jonathan Mcmurry, Verra M. Ngwa, Et Al.
Faculty and Research Publications
UNC-89 is a giant polypeptide located at the sarcomeric M-line of Caenorhabditis elegans muscle. The human homologue is obscurin. To understand how UNC-89 is localized and functions, we have been identifying its binding partners. Screening a yeast two-hybrid library revealed that UNC-89 interacts with paramyosin. Paramyosin is an invertebrate-specific coiled-coil dimer protein that is homologous to the rod portion of myosin heavy chains and resides in thick filament cores. Minimally, this interaction requires UNC-89’s SH3 domain and residues 294–376 of paramyosin and has a KD of ∼1.1 μM. In unc-89 loss-of-function mutants that lack the SH3 domain, paramyosin is found …
Novel Cell Penetrating Peptides Effect Endosomal Escape And Deliver Protein Cargos Into Living Cells, Verra M. Ngwa
Novel Cell Penetrating Peptides Effect Endosomal Escape And Deliver Protein Cargos Into Living Cells, Verra M. Ngwa
Master of Science in Chemical Sciences Theses
Over the last decade a number of peptides that are rapidly internalized by mammalian cells have been discovered or designed. Cell-penetrating peptides (CPPs) are capable of mediating penetration of the plasma membrane, allowing delivery of macromolecular cargoes to the cell interior. We have developed a novel CPP-adaptor protein technology that allows any user-defined cargo delivery and release into the cytoplasm. Our hypothesis is that a CPP-adaptor with a moiety allowing high-affinity but reversible non-covalent cargo binding would lead to more efficient penetration and release than current CPP delivery strategies. Delivery of proteins to the interiors of cells has many applications. …
The Hv1 Proton Channel Of Lingulodinium Polyedrum Localizes To The Bioluminescent Scintillon, Juan D. Rodriguez
The Hv1 Proton Channel Of Lingulodinium Polyedrum Localizes To The Bioluminescent Scintillon, Juan D. Rodriguez
Master of Science in Integrative Biology Theses
In 1972, J. Woodland Hastings and colleagues predicted the existence of a proton selective channel that opens in response to depolarizing voltage (HV1) across the vacuole membrane of bioluminescent dinoflagellates and conducts protons into specialized luminescence compartments (scintillons), thus causing the pH drop that triggers the light flash. RNA-Seq data from several luminescent dinoflagellate species provided candidate HV1 genes. When expressed in mammalian cells, the predicted HV1 from Lingulodinium polyedrum displays the hallmark properties of bona fide proton channels, including time-dependent opening with depolarization, perfect proton selectivity, and characteristic pH dependent gating. RT-PCR and …
The Evolution Of The Surface Of The Mineral Schreibersite In Prebiotic Chemistry, Nikita L. La Cruz, Danna Qasim, Heather Abbott-Lyon, Claire Pirim
The Evolution Of The Surface Of The Mineral Schreibersite In Prebiotic Chemistry, Nikita L. La Cruz, Danna Qasim, Heather Abbott-Lyon, Claire Pirim
Faculty and Research Publications
We present a study of the reactions of the meteoritic mineral schreibersite (Fe,Ni)3P, focusing primarily on surface chemistry and prebiotic phosphorylation. In this work, a synthetic analogue of the mineral was synthesized by mixing stoichiometric proportions of elemental iron, nickel and phosphorus and heating in a tube furnace at 820 °C for approximately 235 hours under argon or under vacuum, a modification of the method of Skála and Drábek (2002). Once synthesized, the schreibersite was characterized to confirm the identity of the product as well as to elucidate the oxidation processes affecting the surface. In addition to characterization of the …
Thermal Analysis Of Borosilicate Glass For Its Biological Applications, Gregory Humble
Thermal Analysis Of Borosilicate Glass For Its Biological Applications, Gregory Humble
Symposium of Student Scholars
Borosilicate glass doped with varying wt% of cerium oxide is investigated for biological applications. Thermal studies of each formulation were conducted using an SDT Q600 differential scanning calorimeter. 30mg samples of 350 - 425 μm particle size of each type of glass were heated to 1200°C in order to obtain the glass transition, crystallization, and melting temperatures. Samples were then heated to 900°C at several heating rates, ranging from 2°C/min to 100°C/min, then compared against each other as well as against an undoped borosilicate glass.
Antifungal Activity Of Essential Oils On Aspergillus Parasiticus Isolated From Peanuts, Mina M. Yooussef, Quyen Pham, Premila Achar, Marikunte Yanjarappa Sreenivasa
Antifungal Activity Of Essential Oils On Aspergillus Parasiticus Isolated From Peanuts, Mina M. Yooussef, Quyen Pham, Premila Achar, Marikunte Yanjarappa Sreenivasa
Faculty and Research Publications
Aspergillus parasiticus is one of the most common fungi which contaminates peanuts by destroying peanut shells before they are harvested and the fungus produces aflatoxins. The aim of this study was to evaluate the antifungal activities of seventeen essential oils on the growth of the aflatoxigenic form of A. parasiticus in contaminated peanuts from commercial outlets in Georgia. The agar dilution method was used to test the antifungal activity of essential oils against this form of A. parasiticus at various concentrations: 500; 1,000; 1,500; 2,000; 2,500 ppm. Among the seventeen essential oils tested, the antifungal effect of cinnamon, lemongrass, clove …
2016 - The Twenty-First Annual Symposium Of Student Scholars
2016 - The Twenty-First Annual Symposium Of Student Scholars
Symposium of Student Scholars Program Books
The full program book from the Twenty-first Annual Symposium of Student Scholars, held on April 21, 2016. Includes abstracts from the presentations and posters.
Localisation And Protein-Protein Interactions Of The Helicobacter Pylori Taxis Sensor T1pd And Their Connection To Metabolic Functions, Wiebke Behrens, Tobias Schweinitzer, Jonathan L. Mcmurry, Christine Josenhans
Localisation And Protein-Protein Interactions Of The Helicobacter Pylori Taxis Sensor T1pd And Their Connection To Metabolic Functions, Wiebke Behrens, Tobias Schweinitzer, Jonathan L. Mcmurry, Christine Josenhans
Faculty and Research Publications
The Helicobacter pylori energy sensor TlpD determines tactic behaviour under low energy conditions and is important in vivo. We explored protein-protein interactions of TlpD and their impact on TlpD localisation and function. Pull-down of tagged TlpD identified protein interaction partners of TlpD, which included the chemotaxis histidine kinase CheAY2, the central metabolic enzyme aconitase (AcnB) and the detoxifying enzyme catalase (KatA). We confirmed that KatA and AcnB physically interact with TlpD. While the TlpD-dependent behavioural response appeared not influenced in the interactor mutants katA and acnB in steady-state behavioural assays, acetone carboxylase subunit (acxC) mutant behaviour was altered. TlpD was …
A Phylogenomic Assessment Of Ancient Polyploidy And Genome Evolution Across The Poales, Michael R. Mckain, Haibao Tang, Joel R. Mcneal, Et Al.
A Phylogenomic Assessment Of Ancient Polyploidy And Genome Evolution Across The Poales, Michael R. Mckain, Haibao Tang, Joel R. Mcneal, Et Al.
Faculty and Research Publications
Comparisons of flowering plant genomes reveal multiple rounds of ancient polyploidy characterized by large intra-genomic syntenic blocks. Three such whole genome duplication (WGD) events, designated as rho (ρ), sigma (σ), and tau (τ), have been identified in the genomes of cereal grasses. Precise dating of these WGD events is necessary to investigate how they have influenced diversification rates, evolutionary innovations, and genomic characteristics such as the GC profile of protein coding sequences. The timing of these events has remained uncertain due to the paucity of monocot genome sequence data outside the grass family (Poaceae). Phylogenomic analysis of protein coding genes …
Hoxd Expression In The Fin-Fold Compartment Of Basal Gnathostomes And Implications For Paired Appendage Evolution, Frank J. Tulenko, Gaius J. Augustus, James L. Massey, Seth E. Sims
Hoxd Expression In The Fin-Fold Compartment Of Basal Gnathostomes And Implications For Paired Appendage Evolution, Frank J. Tulenko, Gaius J. Augustus, James L. Massey, Seth E. Sims
Faculty and Research Publications
The role of Homeobox transcription factors during fin and limb development have been the focus of recent work investigating the evolutionary origin of limb-specific morphologies. Here we characterize the expression of HoxD genes, as well as the cluster-associated genes Evx2 and LNP, in the paddlefish Polyodon spathula, a basal ray-finned fish. Our results demonstrate a collinear pattern of nesting in early fin buds that includes HoxD14, a gene previously thought to be isolated from global Hoxregulation. We also show that in both Polyodon and the catsharkScyliorhinus canicula (a representative chondrichthyan) late phaseHoxD transcripts are present in cells of the fin-fold …
Efn-4 Functions In Lad-2-Mediated Axon Guidance In Caenorhabditis Elegans, Alicia A. Schwieterman, Cory J. Donelson, Jonathan L. Mcmurry, Martin L. Hudson
Efn-4 Functions In Lad-2-Mediated Axon Guidance In Caenorhabditis Elegans, Alicia A. Schwieterman, Cory J. Donelson, Jonathan L. Mcmurry, Martin L. Hudson
Faculty and Research Publications
During development of the nervous system, growing axons rely on guidance molecules to direct axon pathfinding. A well-characterized family of guidance molecules are the membrane-associated ephrins, which together with their cognate Eph receptors, direct axon navigation in a contact-mediated fashion. InC. elegans, the ephrin-Eph signaling system is conserved and is best characterized for their roles in neuroblast migration during early embryogenesis. This study demonstrates a role for theC. elegansephrin EFN-4 in axon guidance. We provide both genetic and biochemical evidence that is consistent with theC. elegansdivergent L1 cell adhesion molecule LAD-2 acting as a non-canonical ephrin receptor to EFN-4 to …
Isothermal Titration Calorimetry Uncovers Substrate Promiscuity Of Bicupin Oxalate Oxidase From Ceriporiopsis Subvermispora, Hassan Rana, Patricia Moussatche, Lis Souza Rocha, Ellen W. Moomaw
Isothermal Titration Calorimetry Uncovers Substrate Promiscuity Of Bicupin Oxalate Oxidase From Ceriporiopsis Subvermispora, Hassan Rana, Patricia Moussatche, Lis Souza Rocha, Ellen W. Moomaw
Faculty and Research Publications
Isothermal titration calorimetry (ITC) may be used to determine the kinetic parameters of enzymecatalyzed reactions when neither products nor reactants are spectrophotometrically visible and when the reaction products are unknown. We report here the use of the multiple injection method of ITC to characterize the catalytic properties of oxalate oxidase (OxOx) from Ceriporiopsis subvermispora (CsOxOx), a manganese dependent enzyme that catalyzes the oxygen-dependent oxidation of oxalate to carbon dioxide in a reaction coupled with the formation of hydrogen peroxide. CsOxOx is the first bicupin enzyme identified that catalyzes this reaction. The multiple injection ITC method of measuring OxOx activity involves …
Bioinformatics Resources For Microrna Discovery, Alyssa C. Moore, Jonathan S. Winkjer, Tsai-Tien Tseng
Bioinformatics Resources For Microrna Discovery, Alyssa C. Moore, Jonathan S. Winkjer, Tsai-Tien Tseng
Faculty and Research Publications
Biomarker identification is often associated with the diagnosis and evaluation of various diseases. Recently, the role of microRNA (miRNA) has been implicated in the development of diseases, particularly cancer. With the advent of next-generation sequencing, the amount of data on miRNA has increased tremendously in the last decade, requiring new bioinformatics approaches for processing and storing new information. New strategies have been developed in mining these sequencing datasets to allow better understanding toward the actions of miRNAs. As a result, many databases have also been established to disseminate these findings. This review focuses on several curated databases of miRNAs and …
Micrornas Expressed During Viral Infection: Biomarker Potential And Therapeutic Considerations, Jennifer Louten, Michael Beach, Kristina Palermino, Maria Weeks, Gabrielle Holenstein
Micrornas Expressed During Viral Infection: Biomarker Potential And Therapeutic Considerations, Jennifer Louten, Michael Beach, Kristina Palermino, Maria Weeks, Gabrielle Holenstein
Faculty and Research Publications
MicroRNAs (miRNAs) are short sequences of noncoding single-stranded RNAs that exhibit inhibitory effects on complementary target mRNAs. Recently, it has been discovered that certain viruses express their own miRNAs, while other viruses activate the transcription of cellular miRNAs for their own benefit. This review summarizes the viral and/or cellular miRNAs that are transcribed during infection, with a focus on the biomarker and therapeutic potential of miRNAs (or their antagomirs). Several human viruses of clinical importance are discussed, namely, herpesviruses, polyomaviruses, hepatitis B virus, hepatitis C virus, human papillomavirus, and human immunodeficiency virus.
Novel Cell Penetrating Peptide-Adaptors Effect Intracellular Delivery And Endosomal Escape Of Protein Cargos, John C. Salerno, Verra M. Ngwa, Scott J. Nowak, Carol A. Chrestensen, Allison N. Healey, Jonathan L. Mcmurry
Novel Cell Penetrating Peptide-Adaptors Effect Intracellular Delivery And Endosomal Escape Of Protein Cargos, John C. Salerno, Verra M. Ngwa, Scott J. Nowak, Carol A. Chrestensen, Allison N. Healey, Jonathan L. Mcmurry
Faculty and Research Publications
The use of cell penetrating peptides (CPPs) as biomolecular delivery vehicles holds great promise for therapeutic and other applications, but development has been stymied by poor delivery and lack of endosomal escape. We have developed a CPP-adaptor system capable of efficient intracellular delivery and endosomal escape of user-defined protein cargos. The cell penetrating sequence of HIV transactivator of transcription was fused to calmodulin, which binds with subnanomolar affinity to proteins containing a calmodulin binding site. Our strategy has tremendous advantage over prior CPP technologies because it utilizes high affinity noncovalent, but reversible coupling between CPP and cargo. Three different cargo …