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Full-Text Articles in Molecular Biology

Differences In Fecal Metabolite Profiles From Geographically Distinct Populations Of Adolescents, Jessica Moncivaiz Jan 2015

Differences In Fecal Metabolite Profiles From Geographically Distinct Populations Of Adolescents, Jessica Moncivaiz

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Microbiota of the gastrointestinal tract have a variety of functions within the human body. They participate in protection of the host from pathogens, aid in immune system development and regulation, and carry out a variety of metabolic functions. This study focuses on the ability of gut microbiota to create metabolites through the degradation of food products. Using 1H NMR on fecal water extracts, I compared the metabolite profiles of two geographically distinct cohorts: healthy adolescents from Egypt (n=28) and healthy adolescents from the United States (n=14). Multivariate statistical analyses of binned NMR data confirmed that samples separated into ...


Analysis Of Chromatin Accessiblity Of The Human C-Myc Replication Origin, Tu Thien Danh Jan 2015

Analysis Of Chromatin Accessiblity Of The Human C-Myc Replication Origin, Tu Thien Danh

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The best characterized eukaryote replication model is of the budding yeast Saccharomyces cerevisiae. Replication origins of S.cerevisiae are 100 to 200 bp in size and contain an essential 11-bp autonomous replicating sequence (ARS) consensus sequence (ACS). The origin recognition complex (ORC) binds to the ACS in order to recruit additional replication factors (Cdt1, Cdc6, MCM, Cdc45) and together they form the pre-replication complex (pre-RC).

Unlike budding yeast, the mammalian cells contain dispersed replication origins in which multiple elements distributed over large distances act as replication start sites. Mammalian DNA replication origins, such as the c-myc origin, contain a DNA ...


Distinguishing Melanocytic Nevi From Melanoma By Dna Copy Number Changes: Array-Comparative Genomic Hybridization As A Research Tool, Ahmed Ibrahim Mahas Jan 2015

Distinguishing Melanocytic Nevi From Melanoma By Dna Copy Number Changes: Array-Comparative Genomic Hybridization As A Research Tool, Ahmed Ibrahim Mahas

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Skin melanocytes can give rise to different benign and malignant neoplasms. Discrimination of an early melanoma from an unusual/atypical benign nevus can represent a significant challenge. However, previous studies have shown that in contrast to benign nevi, melanoma demonstrates pervasive chromosomal aberrations. This substantial difference between melanoma and benign nevi formed the idea of exploiting this difference to discriminate between melanoma and benign nevi. Array-comparative genomic hybridization (aCGH) is an approach that can be used on DNA extracted from formalin-fixed paraffin-embedded (FFPE) tissues to assess the entire genome for the presence of changes in DNA copy number. In this ...


Profiling Fatty Acid Composition Of Brown Adipose Tissue, White Adipose Tissue And Bone Marrow Adipose Tissue Of Healthy And Diet-Induced Obese Mice, Urszula Osinska Warncke Jan 2015

Profiling Fatty Acid Composition Of Brown Adipose Tissue, White Adipose Tissue And Bone Marrow Adipose Tissue Of Healthy And Diet-Induced Obese Mice, Urszula Osinska Warncke

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Bone marrow adipose tissue (MAT) contains a fat depot of unknown function. Characterization of this tissue in healthy and pathophysiological conditions may be an important step in order to understand MAT contribution to development of osteoporosis and perhaps to develop means to improve bone health by manipulation with a phenotype of MAT. Here we demonstrate that MAT, brown adipose tissue (BAT), and white adipose tissue (WAT) derived from healthy mice differ in fatty acid and phospholipid composition. The profile of MAT changed to resemble a less-metabolically active tissue upon metabolic impairment as seen in diet-induced obesity. Additionally, PPARγ activation alters ...


Identifying The Amino Acids Important For Hiv Rev-Tubulin Interactions, Bruce E. Dukes Ii Jan 2015

Identifying The Amino Acids Important For Hiv Rev-Tubulin Interactions, Bruce E. Dukes Ii

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The Rev protein is Human Immunodeficiency virus's "switch" from events occurring early in infection to later events. Early in infection, the 13 KDa Rev protein begins to accumulate in the host cell nucleus. Once enough Rev is produced, Rev stimulates a switch in viral gene expression by multimerizing onto nuclear viral RNAs and stimulating their export into the cytoplasm. Multimerization occurs on an RNA structure called the Rev Response Element (RRE). Several Rev monomers bind the RRE and once that threshold is met the Rev-RRE complex is exported out of the nucleus. Once out of the nucleus the Rev-RRE ...


Improving Dna Quality Using Ffpe Tissues For Array Comparative Genomic Hybridization To Find Single Nucleotide Polymorphisms (Snps) In Melanoma, Keerti Potluri Jan 2015

Improving Dna Quality Using Ffpe Tissues For Array Comparative Genomic Hybridization To Find Single Nucleotide Polymorphisms (Snps) In Melanoma, Keerti Potluri

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Important classes of benign and malignant neoplasms are composed of melanocytic cells which produce a pigment called melanin. Benign nevi, which are non-malignant melanocytic lesions, can sometimes give rise to malignant melanoma. Melanoma can be a lethal melanocytic neoplasm, a deadly and aggressive form of skin cancer. Finding prognostic or diagnostic markers can be very useful to reduce the deaths caused by melanoma. Array Comparative Genomic Hybridization (aCGH), a cytogenetic technique, analyzes the whole genome or chromosome for detecting genetic aberrations/variations such as single nucleotide polymorphisms (SNPs) in a cancer. formalin fixed paraffin embedded FFPE tissues are usually taken ...


Purification Of Recombinant Δ Np63 Α And Characterization Of Peptide Binding, Amal Abdulah Albati Jan 2015

Purification Of Recombinant Δ Np63 Α And Characterization Of Peptide Binding, Amal Abdulah Albati

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δ NP63α, the primary p63 isoform of the p53 transcription factor family, is a proto-oncogene implicated in non-melanoma skin cancers. Expressed in the basal layer of the epidermis, δ NP63α promotes cell survival and proliferation. Inhibition of this protein could potentially be beneficial in non-melanoma skin cancer patients. The first goal of this project was the purification of recombinant δ NP63α in Escherichia Coli. Recombinant δ NP63α was expressed as GST-δ NP63α followed by GST cleavage using GST trap affinity column chromatography yielding pure δ NP63α The second objective of this project was to test the binding capabilities of peptides ...