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A Genetic Selection for Mycobacterium smegmatis Mutants Tolerant to Killing by Sodium Citrate Defines a Combined Role for Magnesium Homeostasis and Osmotic Stress in Cell Death

ABSTRACT: Regulation of Mycobacterium smegmatis gene expression by treatment with sodium citrate.

ORGANISM(S): Mycolicibacterium smegmatis MC2 155

PROVIDER: GSE180696 | GEO | 2023/09/06

REPOSITORIES: GEO

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A Genetic Selection for Mycobacterium smegmatis Mutants Tolerant to Killing by Sodium Citrate Defines a Combined Role for Magnesium Homeostasis and Osmotic Stress in Cell Death

Project description:A Genetic Selection for Mycobacterium smegmatis Mutants Tolerant to Killing by Sodium Citrate Defines a Combined Role for Magnesium Homeostasis and Osmotic Stress in Cell Death

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A Randomized Prospective Trial Comparing Polyethylene Glycol and Sodium Picosulphate With Magnesium Citrate

Project description:Adequate bowel cleansing is important for a completeness of colonoscopy and detection of colon polyps. Inadequate bowel preparation leads to longer duration of colonoscopy and obscured mucosal visualization resulting in missed lesions. Bowel cleansing agents are simply classified into the large volume, iso-osmotic polyethylene glycol (PEG) based solutions or the small volume osmotically active agents, such as sodium picosulphate with magnesium citrate (SPMC). There are rare reports that compare directly conventional polyethylene glycol (PEG) solution and sodium picosulphate with magnesium citrate (SPMC) for bowel preparation in korea. The aim of this study is to compare the efficacy, safety, and tolerability of different regimens of SPMC and PEG solution.

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RNA-seq of Mycobacteriophage Island3 infection of Mycolicibacterium smegmatis mc2155, Mycolicibacterium smegmatis mc2155(Butters), and Mycolicibacterium smegmatis mc2155(Buttersgp57r)

Project description:RNA-seq of Mycobacteriophage Island3 infection of Mycolicibacterium smegmatis mc2155, Mycolicibacterium smegmatis mc2155(Butters), and Mycolicibacterium smegmatis mc2155(Buttersgp57r) to assess the impact of Butters lysogen and specifically Buttersgp57r on transcript levels of island3 during infection.

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Polyethylene glycol vs sodium picosulfate/magnesium citrate for colonoscopy preparation.

Project description:Background and study aimsPolyethylene glycol-based electrolyte solutions (PEG-ELS) and the combination of sodium picosulfate/magnesium citrate (SPMC) are commonly used bowel preparation agents. The aim of the present study was to compare the two agents with regard to cleansing efficacy and tolerance among individuals scheduled for outpatient colonoscopy.Materials and methodsThe 368 colonoscopy outpatients at three Norwegian hospitals were randomized to bowel lavage with either PEG-ELS or SPMC. Compliance and patient tolerance were evaluated using a patient questionnaire. Bowel cleansing was evaluated using the Ottawa Bowel Preparation Quality Scale (OBPS), a validated scoring system with scores between 0 (best) and 14.ResultsThere was no difference in the cleansing quality between the PEG-ELS and SPMC groups (median OBPS 5.0 in both groups). The group that received SPMC reported better overall patient tolerance than the PEG-ELS group (72.6 % vs 59.0 % reporting no or slight discomfort, P < 0.01). Compliance with the recommended total fluid intake (4 L) was better in the SPMC group than in the PEG-ELS group (94.2 % vs 81.2 % respectively, P < 0.01); moreover, the polyp detection rate was superior (34.3 % vs 23.3 %, P = 0.02).ConclusionPEG-ELS and SPMC are equally effective in cleansing efficacy, but SPMC was better tolerated by patients and resulted in superior patient compliance and polyp detection rate.Clinical trial registrationNCT01624454.

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Characterization of Mycobacterium smegmatis SigF regulon

Project description:Mycobacterium smegmatis SigF is a group III sigma factor. Its ortholog in M. tuberculosis is reported to have role in regulation and function of cell wall components. In present study we have created an M. smegmatis ΔsigF mutant by allele exchange method. M. smegmatis sigF mutant shows non pigmented phenotype and is more sensitive to hydrogen peroxide generated oxidative stress. DNA microarray analysis of M. smegmatis wild type and ΔsigF mutant suggests that SigF in this species controls the expression of several energy and central intermediary metabolism genes along with regulation of carotenoid biosynthesis.

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A Multi-centre Study Comparing the Polyp Detection Rate of Two Different Types of Bowel Preparation: a 2-litre Solution (MOVIPREP) Versus a Hyperosmotic and Stimulant Combined Low Volume Bowel Preparation (Sodium Picosulfate and Magnesium Citrate)

Project description:To compare the polyp and adenoma detection rate of MOVIPREP versus an oral Sodium Picosulfate/Magnesium Citrate solution.

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Selective autophagic degradation of ATP citrate lyase maintains citrate homeostasis and promotes oocyte maturation

Project description:Autophagy is a cellular and energy homeostatic mechanism that contributes to maintain the number of primordial follicles, germ cell survival, and anti-ovarian aging. However, it remains unknown whether autophagy in granulosa cells affects the oocyte maturation. Here, we show a clear tendency of reduced autophagy level in human granulosa cell from women of advanced maternal age, implying a potential negative correlation between autophagy level and oocyte quality. We therefore established a co-culture system and show that either pharmacological inhibition or genetic ablation of autophagy in granulosa cells negatively affect the oocyte quality and fertilization ability. Moreover, our metabolomics analysis indicates that the adverse impact of autophagy impairment on oocyte quality is mediated by downregulated citrate levels, while exogenous supplementation of citrate can significantly restore the oocyte maturation. In molecular level, we found ATP citrate lyase (Acly), which is a crucial enzyme catalyzing the cleavage of citrate, was preferentially associated with K63-linked ubiquitin chains and recognized by the autophagy receptor protein SQSTM1/p62 for the selective autophagic degradation. In human follicles, autophagy levels in granulosa cells was downregulated with maternal aging, accompanied by decreased citrate in the follicular fluid, implying a potential correlation between citrate metabolism and oocyte quality. We also show that elevated citrate levels in porcine follicular fluid promote oocyte maturation. Collectively, our data reveal that autophagy in granulosa cells is a beneficial mechanism to maintain a certain degree of citrate by selectively targeting Acly during oocyte maturation.

2023-01-09 | GSE190697 | GEO

Cholesterol chemostat M. smegmatis

Project description:M. smegmatis grown on cholesterol or glycerol in continous culture at a dilution rate of 0.01 h-1.

2016-01-01 | GSE71818 | GEO

Mycolicibacterium smegmatis

Project description:Mycolicibacterium smegmatis Proteome

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citrate vs nitrate Reducing cultures

Project description:The effect of nitrate reduction (anaerobic cultivation in the presence of heme, vitamin K2 and nitrate) was compared with anaerobic cultivation supplemented with citrate (Lactobacillus plantarum). The medium was chemically defined medium with mannitol as main carbon source Two-condition experiment, nitrate vs citrate reducing cells. Biological replicates: 4 nitrate reducing cultures, 4 citrate reducing cultures, independently grown and harvested. Two slides were used, each slide contained 8 Arrays. Citrate reducing cultures are called reactor 1-4, Nitrate reducing cultures are called reactor A-D

2010-05-16 | E-GEOD-18339 | biostudies-arrayexpress

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