Inactivated Rothia nasimurium promotes a persistent antiviral immune status in porcine alveolar macrophages
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ABSTRACT:
PROVIDER: PRJNA1217920 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| Other | ||||
| SRR32192700_1.fastq.gz | Fastqsanger.gz | |||
| SRR32192700_2.fastq.gz | Fastqsanger.gz | |||
| SRR32192702_1.fastq.gz | Fastqsanger.gz | |||
| SRR32192702_2.fastq.gz | Fastqsanger.gz |
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Project description:Globalization has increased in the incidence of infectious diseases in livestock, further aggravated by the reduction of antibiotic consumption. To minimise the resulting economic consequences to the meat production industry, as well as the higher risk of zoonotic events, immunostimulants have risen as a potential strategy to enhance animal resilience to diseases. The capability of bacterial-based immunostimulants to modulate innate immune cells functionality makes them cost-effective candidates to be used in livestock, whether as vaccine adjuvants, as antimicrobials, or as preventive immunostimulators inducing long-term innate immune memory. Here we characterized in vitro the immunostimulatory properties of a strain of Rothia nasimurium isolated from warthog fecal microbiota. Stimulation with heat-inactivated bacteria induced cytokine production by porcine immune cells, and a robust innate immune transcriptomic signature in porcine alveolar macrophages. Interestingly, the bacteria induced inflammasome activation and IL1b production, thus confirming its proinflammatory properties, and suggesting its potential as vaccine adjuvant. Importantly, this immunostimulatory status functionally resulted in an antimicrobial state, hampering the replication levels of two major porcine viral pathogens: the porcine reproductive and respiratory syndrome virus (PRRSV) and the African swine fever virus (ASFV). Moreover, alveolar macrophages showed an enhanced cytokine response upon ASFV infection several days after heat-inactivated bacteria stimulation, suggesting the induction of an innate immune memory phenotype. This nonspecific response resulted in a significant reduction of ASFV replication kinetics, demonstrating the capacity of the bacteria to induce a more resistant state in macrophages against a highly lethal virus infection. Altogether, these results demonstrate the immunostimulatory capability of heat-inactivated Rothia nasimurium in porcine macrophages, showing potential to enhance animal resilience to diseases through the modulation of innate immune cells responsiveness to infections.
2025-06-25 | GSE288520 | GEO
Project description:Rothia nasimurium strain:D24 Genome sequencing
| PRJNA1219541 | ENA
Project description:Rothia nasimurium strain:Y1 Genome sequencing and assembly
| PRJNA1064561 | ENA
Project description:Rothia nasimurium strain:PT-32 Genome sequencing and assembly
| PRJNA321506 | ENA
Project description:Rothia nasimurium was known previously as an opportunistic pathogen of animals. However, there are few reports regarding the pathogenicity of Rothia nasimurium. In September 2020, geese contracted a disease of unknown cause which brought economic losses to a farm in Jiangsu Province, China, prompting a series of investigations. The bacterium was isolated, cultured, and purified, and then identified using Gram staining, biochemical tests, matrix-assisted laser desorption/ionization time of flight mass spectrometry, and 16S rRNA sequence analysis. After determining the obtained bacteria species, antibiotic susceptibility tests and animal regression experiments were carried out. A strain of bacterium was successfully isolated from the livers of the diseased geese, which was identified as a strain of the Gram-positive bacterium Rothia nasimurium according to the 16S rRNA sequencing results. By indexing references, no goose was reported to have been infected with Rothia nasimurium. The antibiotic susceptibility testing showed that only four antibiotics (amikacin, cefazolin, fosfomycin, and ampicillin/sulbactam) could effectively inhibit the growth of the Rothia nasimurium strain. The animal regression experiments showed that the novel isolated strain could infect goslings, and it also causes serious depilation of goslings. The results of the manuscript expanded the range of pathogenic microorganisms in geese, which is helpful to develop methods for avian endemic control.
| S-EPMC9145032 | biostudies-literature
Project description:Rothia nasimurium is a facultative anaerobic Gram-positive coccus belonging to the Rothia genus of the Micrococcaceae family. While Rothia nasimurium is considered an opportunistic pathogen, to date few studies have investigated its pathogenicity and drug resistance. In January 2022, chickens at a poultry farm in China's Xinjiang Uygur Autonomous Region became ill and died. Treatment with commonly used Chinese medicines and antibiotics was ineffective, causing economic losses to the poultry farm. In order to determine the cause of the disease in these poultry farm chickens, the isolation and identification of the pathogens in the livers and other internal organs of the sick and dead chickens were performed. Further, animal pathogenicity tests, antibiotic susceptibility tests, and the detection of antibiotic resistance genes were carried out to analyze the pathogenicity and drug resistance of the identified pathogens. A Gram-positive coccus was isolated from the livers of the diseased chickens. The isolate was resistant to 17 antibiotics, including ciprofloxacin, chloramphenicol, and florfenicol, and was only sensitive to penicillin, amikacin, and tigecycline, to varying degrees. The results of the drug resistance gene testing indicated that the isolated bacterium carried 13 kinds of resistance genes. Matrix-assisted laser desorption/ionization time-of-flight mass spectrometry, morphological observations, biochemical tests, and 16S rRNA gene sequence analysis were performed on the isolated bacterium, and it was determined that the isolated bacterial strain was Rothia nasimurium. The animal pathogenicity tests showed that the isolate caused feather loss and death in chicks; the clinical symptoms and necropsy lesions of the test chicks were consistent with those observed in the farmed chickens. A review of the literature revealed that, to date, there are no reports of infection with Rothia nasimurium in chickens. Thus, in this study, Rothia nasimurium was isolated from chickens for the first time and an investigation of the biological characteristics of the bacterium was carried out in order to provide a reference for the clinical treatment, prevention, and control of Rothia nasimurium infection.
| S-EPMC9783258 | biostudies-literature