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SRX21755797: GSM7775308: 1_Lcr35 + STS; Lacticaseibacillus rhamnosus; RNA-Seq
1 ILLUMINA (Illumina NovaSeq 6000) run: 40.4M spots, 4G bases, 1.2Gb downloads

External Id: GSM7775308_r1
Submitted by: LMGE, UCA
Study: Elemental sulfur enhances the anti-fungal effect of Lacticaseibacillus rhamnosus Lcr35
show Abstracthide Abstract
Lacticaseibacillus rhamnosus Lcr35 is a well-known bacterial strain whose efficiency in preventing recurrent vulvovaginal candidiasis has been largely demonstrated in clinical trials. The presence of sodium thiosulfate (STS) has been shown to enhance its ability to inhibit the growth of C. albicans strains. In this study, we confirmed that Lcr35 has a fungicidal effect not only on the planktonic form of C. albicans but also on other life forms such as hypha and biofilm. Transcriptomic analysis showed that the presence of C. albicans induced a metabolic adaptation of Lcr35 potentially associated with a competitive advantage over yeast cells. However, STS alone had no impact on the global gene expression of Lcr35, which is not in favor of the involvement of an enzymatic transformation of STS. Comparative gas chromatography- mass spectrometry analysis of the organic phase from cell-free supernatant (CFS) fractions obtained from Lcr35 cultures performed in the presence and absence of STS identified elemental sulfur (S0) in the samples initially containing STS. In addition, the anti-candida activity of CFS from STS-containing cultures was shown to be pH-dependent and occurred at acidic pH lower than 5. We next investigated the antifungal activity of lactic acid and acetic acid, the two main organic acids produced by Lactobacillus spp. The two molecules affected the viability of C. albicans but only at pH 3.5 and in a dose-dependent manner, an antifungal effect that was enhanced in samples containing STS in which the thiosulfate was decomposed into S0. In conclusion, the use of STS as an excipient in the manufacturing process of Lcr35 exerted a dual action since the production of organic acids by Lcr35 facilitates the decomposition of thiosulfate into S0, thereby enhancing the bacteria's own anti-fungal effect. Overall design: To investigate the transcriptomic impact of Sodium thiosulphate (STS) and C. albicans ATCC MYA-2876 on Lcr35. We then performed RNA-sequencing comparing Lcr35 vs Lcr35 + STS; and Lcr35 vs Lcr35 + C. albicans ATCC MYA-2876.
Sample: 1_Lcr35 + STS
SAMN37359020 • SRS18862569 • All experiments • All runs
Library:
Name: GSM7775308
Instrument: Illumina NovaSeq 6000
Strategy: RNA-Seq
Source: TRANSCRIPTOMIC
Selection: cDNA
Layout: SINGLE
Construction protocol: Total RNA was extracted by the TRIzol method. Harvested cells were immediately submerged in TRIzol reagent (Ambion) on ice (1 mL of TRIzol per 50 cm2 of culture dish surface area). The cells were disrupted using a Fastprep apparatus twice for 45 sec at speed 6. The samples were subsequently centrifuged for 10 min at 14,000 rpm and purified in TRIzol/chloroform (5:1) and chloroform. For RNA precipitation, the samples were incubated in isopropanol at −20°C overnight and centrifuged for 30 min at 10,000 g. RNA samples were washed in ethanol and resuspended in 30 μL of DEPC water (Ambion). Residual DNA in the RNA samples was removed by DNase I treatment (Ambion). The concentration of the RNA samples was determined by Invitrogen Qubit Fluorometer (Thermo Fisher Scientific), and RNA qualities were determined by Agilent RNA pico chip (Agilent Technologies, Santa Clara, California, USA). Sequencing and analysis of the RNA data were performed by the MGX Genomics platform (Montpellier France). Ribosomal RNA was removed from each total RNA sample and libraries were produced using the Stranded mRNA Prep Ligation Kit, and sequenced using NovaSeq flow cell SP in single-read 100 pb (Illumina, San Diego, California, USA).
Runs: 1 run, 40.4M spots, 4G bases, 1.2Gb
Run# of Spots# of BasesSizePublished
SRR2603870340,375,4024G1.2Gb2024-01-08

ID:
29443592

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