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The Msn2/4-like gene transcription factor Com2 (ORF YER130) is a key player of S. cerevisiae response and tolerance to sulphur dioxide

ABSTRACT: Sulphur dioxide (SO2) and its derivatives are widely used as preservatives in food and beverage industries to assure the maintenance of microbiological quality of their products. In this work it is shown, for the first time, the essential role played by the transcriptional regulator Com (ORF YER130c) in S. cerevisiae response and tolerance to SO2, this being the first biological function attributed for this regulator.

ORGANISM(S): Schizosaccharomyces pombe Saccharomyces cerevisiae

PROVIDER: GSE117883 | GEO | 2019/11/04

REPOSITORIES: GEO

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Project description:Chronic obstructive pulmonary disease (COPD) is diagnosed by airway obstruction and underlies a group of ailments such as bronchitis, emphysema and often asthma; however, rodent models do not resemble human pathology. Because genetically predisposed spontaneously hypertensive (SH) rats display phenotypes such as systemic inflammation, thrombosis, oxidative stress, and suppressed immune function, that are also apparent in COPD patients, we exposed SH and commonly used male Sprague Dawley (SD) to 0, 250, or 350 ppm sulfur dioxide (SO2), 5h/d for 4 consecutive days. Airways disease was characterized by pulmonary functional, pathological and molecular analysis. SO2 caused dose-dependent changes in breathing parameters in both strains with SH rats being slightly more affected than SD. Bronchoalveolar lavage fluid (BALF) total cells and neutrophilic inflammation were dose-dependent and significantly greater in SH than in SD rats. The recovery was incomplete 4-day following SO2 exposure in SH rats. Pulmonary protein leakage did not occur in either strain but lactate dehydrogenase and n-acetyl glucosaminidase activity was increased in BALF of SH rats. Lung pathology and morphometric evaluation of mucin production in the airways demonstrated significantly greater impact of SO2 in SH than in SD rats. Baseline differences in lung gene expression pattern suggested marked immune dysregulation, oxidative stress, and impairment cell signaling and fatty acid metabolism in SH rats. Gene expression pattern of SD and SH rats following SO2 exposure demonstrated greater effect on inflammation/immune markers, and oxidative stress. Thus, the SH rat may serve as a better and more susceptible rat strain to be used for experimental model of bronchitis which is relevant to human disease. Experiment Overall Design: Spontaneously hypertensive and Sprague Dawley rats were used in this experiment. Each strain of rat was treated with either SO2 or AIR (control). There were 4 biological replicates for each strain/treatment.

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The Msn2/4-like gene transcription factor Com2 (ORF YER130) is a key player of S. cerevisiae response and tolerance to sulphur dioxide

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