Results: 15

Bioprocess optimization of interferon β-1-a in Pichia pastoris and its improved inhibitory effect against hepatocellular carcinoma cells

Interferon-β-1a (INF-β-1a) has gained significant attention due to its emerging applications in the treatment of different human diseases. Therefore, many researchers have attempted to produce it in large quantities and also in a biologically active form using different expression systems. In the prese...

High-level soluble expression of phospholipase D from Streptomyces chromofuscus in Escherichia coli by combinatorial optimization

BACKGROUND: Phospholipase D (PLD) is used as the biocatalyst for phosphatidylserine (PS) production. In general, PLD was expressed in insoluble form in Escherichia coli. High-level soluble expression of PLD with high activity in E. coli is very important for industrial production of PLD. RESULTS: Strepto...

Avaliação das mutações nos códons 41 e 45 do gene codificante da betacatenina em pacientes portadores de tumor desmoide esporádico e sua associação com o prognóstico

O tumor desmoide (TD) é uma proliferação fibroblástica clonal rara, caracterizada por crescimento infiltrativo e tendência à recidiva local, embora incapaz de metastatizar. A maioria desses tumores é esporádica e contém mutações no gene que codifica a proteína betacatenina. Três mutações e...

NS1 codon usage adaptation to humans in pandemic Zika virus

Mem. Inst. Oswaldo Cruz; 113 (5), 2018
BACKGROUND Zika virus (ZIKV) was recognised as a zoonotic pathogen in Africa and southeastern Asia. Human infections were infrequently reported until 2007, when the first known epidemic occurred in Micronesia. After 2013, the Asian lineage of ZIKV spread along the Pacific Islands and Americas, causing s...

Association between the p53 arginine/arginine homozygous genotype at codon 72 and human papillomavirus E6/E7 mRNA expression

Braz. j. infect. dis; 21 (3), 2017
ABSTRACT Objective: To evaluate the association between p53 polymorphisms and human papillomavirus (HPV) E6/E7 mRNA expression. Methods: We analyzed 175 cervical samples from women aged 16-69 years old who were tested for HPV E6/E7 mRNA expression (NucliSENS® EasyQ® HPV). The samples were divided int...

Long-wavelength sensitive opsin (LWS) gene variability in Neotropical cichlids (Teleostei: Cichlidae)

An. acad. bras. ciênc; 89 (1), 2017
ABSTRACT Cichlid fishes are an important group in evolutionary biology due to their fast speciation. This group depends widely of vision for feeding and reproduction. During the evolutionary process it plays a significant role in interspecific and intraspecific recognition and in its ecology. The molecul...

Lack of evidence of HPV etiology of prostate cancer following radical surgery and higher frequency of the Arg/Pro genotype in turkish men with prostate cancer

Int. braz. j. urol; 43 (1), 2017
ABSTRACT Objectives The aim of this study was to assess the possible role of HPV in the development of prostate cancer (PCa) and investigate the distribution of the p53 codon 72 polymorphism in PCa in a Turkish population. Materials and methods A total of 96 tissues, which had been obtained using a r...

Modified allele-specific PCR improves HER2 Ile655Val detection by reducing genotyping errors

Appl. cancer res; 37 (), 2017
Background: A reliable method to detect gene polymorphisms must be established to eliminate genotyping errors due to false PCR amplification. In the previous study, we have developed AS-PCR (Allele Specific-Polymerase Chain Reaction) to detect HER2 Ile655Val gene polymorphism with good specificity and se...

Over-expression of Mycobacterium neoaurum 3-ketosteroid-∆ 1-dehydrogenase in Corynebacterium crenatum for efficient bioconversion of 4-androstene-3, 17-dione to androst-1, 4-diene-3, 17-dione

Electron. j. biotechnol; 19 (6), 2016
Background: 3-Ketosteroid-∆¹-dehydrogenase (KSDD), a flavoprotein enzyme, catalyzes the bioconversion of 4-androstene-3,17-dione (AD) to androst-1,4-diene-3,17-dione (ADD). To date, there has been no report about characterization of KSDD from Mycobacterium neoaurum strains, which were usually empl...

Beta-thalassemia intermedia in a Brazilian patient with - 101(C > T) and codon 39 (C > T) mutations

Säo Paulo med. j; 121 (1), 2003
CONTEXT: We verified molecular alterations in a 72-year-old Brazilian male patient with a clinical course of homozygous beta-thalassemia intermedia, who had undergone splenectomy and was surviving without regular blood transfusions. The blood cell count revealed microcytic and hypochromic anemia (hemoglo...