Search results for "TCC"

Antibacterial PEGylated Solid Lipid Microparticles for Cosmeceutical Purpose: Formulation, Characterization, and Efficacy Evaluation

2020

The development of efficacious means of delivering antioxidant polyphenols from natural sources for the treatment of skin diseases is of great interest for many cosmetic and pharmaceutical companies. Resveratrol (RSV) and Limonene (LIM) have been shown to possess good anti-inflammatory and antibacterial properties against Staphylococcus aureus infections responsible for many skin disorders, such as acne vulgaris. In this study, solid lipid microparticles are designed as composite vehicles capable of encapsulating a high amount of trans-RSV and enhancing its absorption through the stratum corneum. A microparticulate system based on mixture of PEGylate lipids, long-chain alcohols and LIM is a…

Conservative management of T1G3 transitional cell carcinoma of the bladder. Risk factor analysis in 165 selected patients

2003

INTRODUCTION AND OBJECTIVE: The management of TlG3 transitional cell carcinoma of the bladder (TCCB), is still controversial. Some Authors support an immediate radical cystectomy. BCG is considered the treatment of choice. Limited encouraging experiences are reported with intravesical chemotherapy. Objectives; Evaluating a selected population of 165 patients with TlG3 TCCB, in absence of Tis, treated conservatively with TUR plus adjuvant intravesical therapy. METHODS: Between January 1976 and December 1999, 165 patients with TlG3 bladder tumors were treated by TUR plus adjuvant intravesical therapy. Patients with previuos T1G3, Tis, more than 3 tumors or greater than 3 em were excluded. A s…

Expression in Streptomyces lividans of Nonomuraea genes cloned in an artificial chromosome

2004

A bacterial artificial chromosomal library of Nonomuraea sp. ATCC39727 was constructed using Escherichia coli-Streptomyces artificial chromosome (ESAC) and screened for the presence of dbv genes known to be involved in the biosynthesis of the glycopeptide A40926. dbv genes were cloned as two large, partially overlapping, fragments and transferred into the host Streptomyces lividans, thus generating strains S. lividansColon, two colonsNmESAC50 and S. lividansColon, two colonsNmESAC57. The heterologous expression of Nonomuraea genes in S. lividans was successfully demonstrated by using combined RT-PCR and proteomic approaches. MALDI-TOF analysis revealed that a Nonomuraea ABC transporter is e…

Phosphate-controlled regulator for the biosynthesis of the dalbavancin precursor A40926

2007

ABSTRACT The actinomycete Nonomuraea sp. strain ATCC 39727 produces the glycopeptide A40926, the precursor of the novel antibiotic dalbavancin. Previous studies have shown that phosphate limitation results in enhanced A40926 production. The A40926 biosynthetic gene ( dbv ) cluster, which consists of 37 genes, encodes two putative regulators, Dbv3 and Dbv4, as well as the response regulator (Dbv6) and the sensor-kinase (Dbv22) of a putative two-component system. Reverse transcription-PCR (RT-PCR) and real-time RT-PCR analysis revealed that the dbv14 - dbv8 and the dbv30 - dbv35 operons, as well as dbv4 , were negatively influenced by phosphate. Dbv4 shows a putative helix-turn-helix DNA-bind…

Study and optimization of freeze-drying cycles of a model probiotic strain

2018

This work is based on the experimental study of the freeze-drying process to understand the impact of numerous factors on the survival rates of a model probiotic strain of Lactobacillus casei type. With the aim to find out if cell density in the matrix and survival rates are linked, we have studied the location of the cells after freeze drying inside a porous  matrix composed of a lactose basis with a polymer, the polyvinylpyrrolidone (PVP) in various amounts. The best survival rate were obtained at slow freezing rate for a formulation containing 5% (m/V) of lactose and 5% (m/V) of PVP. Keywords: Freeze-Drying; Freezing; Probiotics; L. Casei ATCC 393 

Institutions, institutional quality, and international competitiveness: Review and examination of future research directions

2021

Abstract The importance of institutions has become more relevant analytically in recent years, emphasizing the significance of an appropriate institutional framework for international competition. This paper aims to identify the link between institutions, institutional quality, and international competitiveness. Following the TCCM (Theory, Context, Characteristics, and Methodology) framework analysis, proposed by Paul & Rosado-Serrano (2019) , we conducted a systematic literature review of top tier journals during the period 2000–2020. This review unfolds the theoretical and empirical studies regarding institutions, institutional quality, and international competitiveness. Main findings rev…

Dynamics of the termination of global alliances: probing the past, analyzing the present and defining the frontiers for future research

2022

PurposeWhile the number of global alliance terminations in the business world has grown steadily during the past few decades, the scholarly literature on strategic alliance (SA) termination remains limited. This research paper aims to perform a bibliometric analysis of the literature on alliance termination and propose a model for future research agenda that links the termination phase to the pre-alliance termination phase and post alliance termination phase.Design/methodology/approachA search query on global alliance termination identified a total of 69 research papers from the Scopus database, and a bibliometric analysis was performed using the bibliometrix R-package and VOSviewer. The an…

Metabolic pathways in Microbispora sp. ATCC-PTA 5024, producer of NAI-107 lantibiotic

2014

Regulatory and metabolic proteins differentially expressed during NAI-107 production in Microbispora sp. ATCC-PTA 5024

2014

Metabolic pathways and regulatory networks associated to NAI-107 lantibiotic production in Microbispora sp. ATCC-PTA-5024

2015

The filamentous actinobacterium Microbispora sp. ATCC-PTA-5024 produces the lantibiotic NAI-107, which is effective against multidrugresistant Gram-positive pathogens. In actinomycetes, the biosynthesis of antibiotics is elicited as a physiological response that is controlled by a complex regulatory network involving general and pathwayspecific regulators. The ‘omics technologies can be useful to explore molecular physiology in bacterial cells and elucidate molecular and metabolic events associated to antibiotic production in order to develop robust and economically-feasible production processes. To this aim, differential proteomic analyses, based two-dimensional difference in gel electroph…