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Full-Text Articles in Molecular Biology

Large Scale Dynamical Model Of Macrophage/Hiv Interactions, Matthew M. Froid Mar 2019

Large Scale Dynamical Model Of Macrophage/Hiv Interactions, Matthew M. Froid

Student Research and Creative Activity Fair

Properties emerge from the dynamics of large-scale molecular networks that are not discernible at the individual gene or protein level. Mathematical models - such as probabilistic Boolean networks - of molecular systems offer a deeper insight into how these emergent properties arise. Here, we introduce a non-linear, deterministic Boolean model of protein, gene, and chemical interactions in human macrophage cells during HIV infection. Our model is composed of 713 nodes with 1583 interactions between nodes and is responsive to 38 different inputs including signaling molecules, bacteria, viruses, and HIV viral particles. Additionally, the model accurately simulates the dynamics of over 50 different ...


Development Of A Pd-L1 Pet Imaging Biomarker, Caleb Jack Bridgwater Nov 2018

Development Of A Pd-L1 Pet Imaging Biomarker, Caleb Jack Bridgwater

Posters-at-the-Capitol

Immunotherapy strategies are very promising treatments for cancer patients. Specifically, Immune checkpoint inhibitor therapy focusing on the PD-1/PD-L1 pathway shows long-lasting positive results in many cancer patients. Unfortunately, not all the patients can benefit from this highly effective treatment. Hence, there is a great need for predictive biomarkers. Immunohistochemical (IHC) staining has been used as a way of predicting patient response, yet shows many problems. For example, IHC utilizes an invasive biopsy and sample fixing, which creates an incomplete and delayed picture of the patient’s biochemistry and the tumor microenvironment, consequently ignoring metastases.

The purpose of this study ...


Mechanisms Mediating The Pro-Fibrotic Effects Of Estradiol, Haley Fulton Nov 2018

Mechanisms Mediating The Pro-Fibrotic Effects Of Estradiol, Haley Fulton

Georgia Undergraduate Research Conference (GURC)

Scleroderma is a connective tissue disease which promotes fibrosis of the skin and internal organs. Scleroderma patients have upregulated production of fibrotic extracellular matrix proteins and upregulated serum estradiol levels compared to control subjects. Estradiol effects eukaryotic transcription and gene expression when it enters the nucleus via one of its nuclear hormone receptors. Estrogen receptor one/ estrogen receptor alpha (ESR1) is present on the nuclear membrane and binds the ligand estrogen. These experiments were designed to study the various isoforms of ESR1 and determine if gene expression of ESR1 was greater in fibroblasts and human skin stimulated with estradiol than ...


Applied Drug Development And Combinatorial Strategies For Antimicrobial Treatment, Steven K. Lai Hing May 2017

Applied Drug Development And Combinatorial Strategies For Antimicrobial Treatment, Steven K. Lai Hing

Andrews Research Conference

Streptococcus mutans JH1140 is a strain of bacteria which produces a lantibiotic product, named mutacin 1140. Mutacin 1140 has been shown to be effective at inhibiting Gram-positive bacterial infections caused by Staphylococcus aureus and Streptococcus pneumoniae. Mutacin 1140 is a ribosomally synthesized peptide antibiotic that undergoes extensive posttranslational modifications (PTM). We have found that Mutacin 1140 and an aminoglycoside, Kanamycin, when combined together, act synergistically against Staphylococcus aureus. This was determined by performing serial kill curve dilution overlays on solid media, followed up with kill curve by microdilution plate, and most recently confirmed with kill curve CFU count plates on ...


Repsa-Directed Identification Of Dna-Binding Specificity For Orphan Transcription Factors, Kamir Hiam Apr 2015

Repsa-Directed Identification Of Dna-Binding Specificity For Orphan Transcription Factors, Kamir Hiam

Symposium of Student Scholars

The function of many genes and the biological roles of their encoded products are still not well characterized. Given the sequence-specific DNA-binding properties of transcription factor proteins, it is possible to purify them, identify the responsible polypeptide(s), determine their consensus binding sequences, and identify their genomic binding sites. Thus, one can go from cellular extract to proposed biological regulatory roles in relatively short order. Our goal is to identify and characterize orphan DNA-binding proteins in the model organism E. coli K12 using the novel combinatorial technique, REPSA (Restriction Endonuclease Protection Selection Amplification), as well as further develop the REPSA ...