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1.
Front Microbiol ; 15: 1351161, 2024.
Article in English | MEDLINE | ID: mdl-38741743

ABSTRACT

A newly isolated bacterium Acinetobacter pittii S-30 was recovered from waste-contaminated soil in Ranchi, India. The isolated bacterium belongs to the ESKAPE organisms which represent the major nosocomial pathogens that exhibit high antibiotic resistance. Furthermore, average nucleotide identity (ANI) analysis also showed its closest match (>95%) to other A. pittii genomes. The isolate showed metal-resistant behavior and was able to survive up to 5 mM of ZnSO4. Whole genome sequencing and annotations revealed the occurrence of various genes involved in stress protection, motility, and metabolism of aromatic compounds. Moreover, genome annotation identified the gene clusters involved in secondary metabolite production (biosynthetic gene clusters) such as arylpolyene, acinetobactin like NRP-metallophore, betalactone, and hserlactone-NRPS cluster. The metabolic potential of A. pittii S-30 based on cluster of orthologous, and Kyoto Encyclopedia of Genes and Genomes indicated a high number of genes related to stress protection, metal resistance, and multiple drug-efflux systems etc., which is relatively rare in A. pittii strains. Additionally, the presence of various carbohydrate-active enzymes such as glycoside hydrolases (GHs), glycosyltransferases (GTs), and other genes associated with lignocellulose breakdown suggests that strain S-30 has strong biomass degradation potential. Furthermore, an analysis of genetic diversity and recombination in A. pittii strains was performed to understand the population expansion hypothesis of A. pittii strains. To our knowledge, this is the first report demonstrating the detailed genomic characterization of a heavy metal-resistant bacterium belonging to A. pittii. Therefore, the A. pittii S-30 could be a good candidate for the promotion of plant growth and other biotechnological applications.

2.
Genes Genomics ; 46(6): 671-687, 2024 06.
Article in English | MEDLINE | ID: mdl-38687436

ABSTRACT

BACKGROUND: Acidic environments naturally occur worldwide and uncontrolled use of agricultural practices may also cause acidification of soils. The development of acidic conditions disturbs the establishment of efficient microbial populations in their natural niches. The survival of Enterobacter species under acidic stress remains poorly understood. OBJECTIVE: This study aimed to investigate the survival of an environmental isolate Enterobacter sp. S-33 under acidic stress and to identify the various genes involved in stress protection at the global gene transcription level. The obtained results provide new targets that will allow understanding the in-depth mechanisms involved in the adaptation of bacteria to environmental pH changes. METHODS: We used the next-generation sequencing (NGS) method to analyze the expression (up-regulation & down-regulation) of genes under varying pH conditions. RESULTS: A total of 4214 genes were differentially expressed under acidic conditions (pH 5.0), with 294 up-regulated and 167 down-regulated. At pH 6.0, 50 genes were significantly expressed, of which 34 and 16 were identified as up-regulated and down-regulated, respectively. Many of the up-regulated genes were involved in carbohydrate metabolism, amino acid transport & metabolism, and the most down-regulated genes were related to post-translational modification, lipid transport & metabolism, etc. The observed transcriptomic regulation of genes and pathways identified that Enterobacter reduced its post-translational modification, lipid transport & metabolism, and increased carbohydrate metabolism, amino acid metabolism & transport, energy production & conversion to adapt and grow in acidic stress. CONCLUSIONS: The present work provides in-depth information on the characterization of genes associated with tolerance or adaptation to acidic stress of Enterobacter bacterium.


Subject(s)
Enterobacter , Gene Expression Regulation, Bacterial , Stress, Physiological , Transcriptome , Enterobacter/genetics , Enterobacter/metabolism , Hydrogen-Ion Concentration , Stress, Physiological/genetics , Bacterial Proteins/genetics , Bacterial Proteins/metabolism
3.
Indian J Ophthalmol ; 72(7): 1017-1020, 2024 Jul 01.
Article in English | MEDLINE | ID: mdl-38454863

ABSTRACT

PURPOSE: To study the pupil dynamics with premixed intracameral anesthetic mydriatic combination of phenylephrine (0.31%), tropicamide (0.02%), and lidocaine (1%) in pediatric cataract surgery. METHODS: Consecutive children aged ≤12 years planned for cataract surgery were recruited. A commercially available premixed combination of phenylephrine (0.31%), tropicamide (0.02%), and lidocaine (1%) was injected at the beginning of surgery without any topical/infusion drugs for mydriasis. Pupil sizes at various points of surgery were studied. RESULTS: We recruited 75 patients with a mean age of 24.3 ± 33.4 months (range: 1 month-11 years). Adequate mydriasis with a single injection was achieved in 93.5% (n = 73 eyes of 70 patients) without additional pharmacotherapy or intervention. The mean pupillary diameter increased from 1.8 ± 0.79 to 6.1 ± 1.4 mm after injection (mean change of 4.2 ± 1.25 mm from baseline). The mean variability in pupillary diameter was 0.73 ± 1.3 mm. In five eyes, good dilatation was not possible even after repeat injection. CONCLUSION: Fixed-dose premixed intracameral injection is effective in pupil dilatation. It alleviates the need for any topical dilators or additional intraoperative supplementation for pediatric cataract surgery.


Subject(s)
Cataract Extraction , Mydriatics , Phenylephrine , Pupil , Tropicamide , Humans , Mydriatics/administration & dosage , Child, Preschool , Male , Infant , Female , Cataract Extraction/methods , Pupil/drug effects , Child , Tropicamide/administration & dosage , Phenylephrine/administration & dosage , Lidocaine/administration & dosage , Anterior Chamber/drug effects , Cataract , Prospective Studies , Follow-Up Studies , Ophthalmic Solutions/administration & dosage , Dose-Response Relationship, Drug
4.
Article in English | MEDLINE | ID: mdl-38457114

ABSTRACT

The bacterial secretome represents a comprehensive catalog of proteins released extracellularly that have multiple important roles in virulence and intercellular communication. This study aimed to characterize the secretome of an environmental isolate Pseudomonas aeruginosa S-8 by analyzing trypsin-digested culture supernatant proteins using nano-LC-MS/MS tool. Using a combined approach of bioinformatics and mass spectrometry, 1088 proteins in the secretome were analyzed by PREDLIPO, SecretomeP 2.0, SignalP 4.1, and PSORTb tool for their subcellular localization and further categorization of secretome proteins according to signal peptides. Using the gene ontology tool, secretome proteins were categorized into different functional categories. KEGG pathway analysis identified the secreted proteins into different metabolic functional pathways. Moreover, our LC-MS/MS data revealed the secretion of various CAZymes into the extracellular milieu, which suggests its strong biotechnological applications to breakdown complex carbohydrate polymers. The identified immunodominant epitopes from the secretome of P. aeruginosa showed the characteristic of being non-allergenic, highly antigenic, nontoxic, and having a low risk of triggering autoimmune responses, which highlights their potential as successful vaccine targets. Overall, the identification of secreted proteins of P. aeruginosa could be important for both diagnostic purposes and the development of an effective candidate vaccine.

5.
Cureus ; 16(2): e54074, 2024 Feb.
Article in English | MEDLINE | ID: mdl-38481891

ABSTRACT

Dengue fever, the most prevalent arbovirus disease, has a broad spectrum of clinical manifestations, ranging from asymptomatic to dengue hemorrhagic fever and dengue shock syndrome. Dengue fever has the potential to involve the nervous system. Acute transverse myelitis is a life-threatening complication of dengue fever, though rarely reported. We report a case of dengue fever-induced transverse myelitis in a 51-year-old male who presented with progressive paraplegia, sensory disturbance, and urinary retention preceded by a febrile illness, vomiting, and retro-orbital pain two weeks before. His serology was positive for immunoglobulin M (IgM) to dengue virus and non-structural protein (NS-1). Magnetic resonance imaging revealed hyperintense signals suggestive of acute transverse myelitis. After ruling out all other possible causes, a possible diagnosis of dengue fever-induced transverse myelitis was made. His condition improved gradually after starting methylprednisolone.

6.
Mol Cell Biochem ; 2024 Feb 28.
Article in English | MEDLINE | ID: mdl-38413478

ABSTRACT

Cancer remains a major global health concern with high mortality rates mainly due to late diagnosis and poor prognosis. Long non-coding RNAs (lncRNAs) are emerging as key regulators of gene expression in human cancer, functioning through various mechanisms including as competing endogenous RNAs (ceRNAs) and indirectly regulating miRNA expression. LncRNAs have been found to have both oncogenic and tumor-suppressive roles in cancer, with the former promoting cancer cell proliferation, migration, invasion, and poor prognosis. Recent research has shown that lncRNAs are expressed in various immune cells and are involved in cancer cell immune escape and the modulation of the tumor microenvironment, thus highlighting their potential as targets for cancer immunotherapy. Targeting lncRNAs in cancer or immune cells could enhance the anti-tumor immune response and improve cancer immunotherapy outcomes. However, further research is required to fully understand the functional roles of lncRNAs in cancer and the immune system and their potential as targets for cancer immunotherapy. This review offers a comprehensive examination of the multifaceted roles of lncRNAs in human cancers, with a focus on their potential as targets for cancer immunotherapy. By exploring the intricate mechanisms underlying lncRNA-mediated regulation of cancer cell proliferation, invasion, and immune evasion, we provide insights into the diverse therapeutic applications of these molecules.

7.
Cureus ; 16(1): e52266, 2024 Jan.
Article in English | MEDLINE | ID: mdl-38352100

ABSTRACT

BACKGROUND: Orthodontists, like any other medical professional, are susceptible to cumulative stressors and their undesirable consequences. The study aims to assess the self-perceived occupational stress levels and the psychological link between predictors and stress among orthodontic practitioners in India. MATERIALS AND METHODS: The participants in this cross-sectional study are active members of the Indian Orthodontic Society (IOS). The data for the survey were collected by a previously validated closed-ended occupational stress assessment (OSA) questionnaire and a job satisfaction questionnaire, which were sent through the registered e-mails. A five-point Likert scale was used to assess the severity of individual stressors, and an overall severity score was obtained by summing up the individual scores. The predictors of stress based on socio-demographic parameters were assessed using a binomial multiple logistic equation. Statistical significance was set at a p-value of <0.05. RESULTS: A total of 311 responses were received. Male orthodontists, unmarried, in the age group of 30-40 years, working in urban areas without any academic attachment were more stressed compared to the other groups in the respective categories. Tiredness/headache (39%) was reported as the most common consequence of occupational stress. The most concerning stressor was patients not wearing retainers. Orthodontists showed overall job satisfaction that is negatively correlated to overall stress (p <0.0001)(r = -0.260). CONCLUSION: A profound variation in stress levels was found among the orthodontists with their socio-demographic and professional characteristics. Despite the stress, orthodontists were highly satisfied with their careers.

8.
Arch Microbiol ; 206(2): 81, 2024 Jan 31.
Article in English | MEDLINE | ID: mdl-38294553

ABSTRACT

Enterobacter genus includes the bacteria occupying every aspect of environment, however, their adaptability at varying temperature is not clear. In the present study, we analyzed the transcriptome response of Enterobacter sp. S-33 and their functional genes under various temperatures (30-45 ℃) that were expressed and accumulated in cells under temperature-stress. During a temperature shift from 37 to 45 ℃, 165 genes showed differential expression including 112 up-regulated and 53 down-regulated. In particular, heat-shock genes such as CspA, 16 kDa heat shock protein A/B and transcriptional regulators such as LysR, TetR, and LuxR were differentially expressed, indicating the role of complex molecular mechanism of Enterobacter adapting to temperature stress. Similarly, genes associated to signal transduction, ABC transporters, iron homeostasis, and quorum sensing were also induced. The Gene ontology enrichment analysis of differentially expressed genes (DEGs) were categorized into "transmembrane transport", "tRNA binding", "hydrogen sulfide biosynthetic process" and "sulfate assimilation" terms. In addition, Kyoto Encyclopedia of Genes and Genomes pathways showed that ABC transporter as well as quorum sensing pathways were significantly enriched. Overall, current study has contributed to explore the adaptive molecular mechanisms of Enterobacter spp. upon temperature change, which further opens new avenues for future in-depth functional studies.


Subject(s)
Enterobacter , Transcriptome , Enterobacter/genetics , Temperature , Biological Transport , Gene Ontology
9.
Indian J Ophthalmol ; 72(1): 51-55, 2024 Jan 01.
Article in English | MEDLINE | ID: mdl-38131569

ABSTRACT

PURPOSE: The efficacy of posterior optic capture (POC) in reducing posterior capsule opacification (PCO) in pediatric cataract is well recognized. The purpose of this paper was to identify the surgical challenges when attempting this technique and highlight the etiquettes to follow when performing this maneuver. METHODS: Prospective observational noncomparative case series. Children diagnosed with congenital or developmental cataracts undergoing cataract surgery and primary IOL implantation with posterior optic capture (and no anterior vitrectomy) from June 2017 to April 2022 at a tertiary care referral institute were included. Records of all intraoperative findings and postoperative complications until the last follow-up were noted. RESULTS: Posterior optic capture was attempted in 53 eyes of 49 children aged 2.4 ± 1.98 years. The mean follow-up of the patients was 16.5 ± 14.2 months (range 6 months-5 years). Successful POC could be performed in 46 eyes (86.8%). Two eyes developed posterior capsular opacification at the last follow-up. In eyes where POC could not be performed, five of these (83%) were children below 12 months of age with half of them having a preexisting posterior capsular defect. CONCLUSION: Posterior optic capture is technically challenging with a steep learning curve that can be mastered over time. Adequate relative sizing of the anterior and posterior capsulorhexis is important. Caution is advised when using this technique in infants and in cases with posterior capsular defects.


Subject(s)
Cataract Extraction , Cataract , Lens Capsule, Crystalline , Lenses, Intraocular , Humans , Infant , Capsulorhexis/methods , Cataract/etiology , Cataract Extraction/adverse effects , Lens Capsule, Crystalline/surgery , Lens Implantation, Intraocular/methods , Lenses, Intraocular/adverse effects , Postoperative Complications/surgery , Vitrectomy/methods , Child, Preschool
10.
Int Microbiol ; 2023 Dec 04.
Article in English | MEDLINE | ID: mdl-38044418

ABSTRACT

Enterobacter species represent widely distributed opportunistic pathogens, commonly associated with plants and humans. In the present study, we performed a detailed molecular characterization as well as genomic study of a type VI secretion system (T6SS) bacterium belonging to member of the family Enterobacteriaceae and named Enterobacter sp. S-33. The comparative sequence analysis of the 16S rRNA gene showed that the strain was closely related to other Enterobacter species. The complete genome of the strain with a genome size of 4.6 Mbp and GC-content of 55.63% was obtained through high-quality sequencing. The genomic analysis with online tools unravelled the various genes belonging to the bacterial secretion system, antibiotic resistance, virulence, efflux pumps, etc. The isolate showed the motility behavior that contributes to Enterobacter persistence in a stressed environment and further supports infections. PCR amplification and further sequencing confirmed the presence of drug-efflux genes acrA, acrB, and outer membrane genes, viz. OmpA, OmpC, and OmpF. The cell surface hydrophobicity and co-aggregation assay against different bacterial strains illustrated its putative pathogenic nature. Genome mining identified various biosynthetic gene clusters (BGCs) corresponding to non-ribosomal proteins (NRPS), siderophore, and arylpolyene production. Briefly, genome sequencing and detailed characterization of environmental Enterobacter isolate will assist in understanding the epidemiology of Enterobacter species, and the further prevention and treatment of infectious diseases caused by these broad-host range species.

11.
Nat Commun ; 14(1): 4108, 2023 07 11.
Article in English | MEDLINE | ID: mdl-37433821

ABSTRACT

Simulating chromatin is crucial for predicting genome organization and dynamics. Although coarse-grained bead-spring polymer models are commonly used to describe chromatin, the relevant bead dimensions, elastic properties, and the nature of inter-bead potentials are unknown. Using nucleosome-resolution contact probability (Micro-C) data, we systematically coarse-grain chromatin and predict quantities essential for polymer representation of chromatin. We compute size distributions of chromatin beads for different coarse-graining scales, quantify fluctuations and distributions of bond lengths between neighboring regions, and derive effective spring constant values. Unlike the prevalent notion, our findings argue that coarse-grained chromatin beads must be considered as soft particles that can overlap, and we derive an effective inter-bead soft potential and quantify an overlap parameter. We also compute angle distributions giving insights into intrinsic folding and local bendability of chromatin. While the nucleosome-linker DNA bond angle naturally emerges from our work, we show two populations of local structural states. The bead sizes, bond lengths, and bond angles show different mean behavior at Topologically Associating Domain (TAD) boundaries and TAD interiors. We integrate our findings into a coarse-grained polymer model and provide quantitative estimates of all model parameters, which can serve as a foundational basis for all future coarse-grained chromatin simulations.


Subject(s)
Chromatin , Animals , Mice , Mouse Embryonic Stem Cells , Chromatin/chemistry , Nucleosomes/chemistry , alpha-Globins/chemistry , Models, Molecular , Protein Structure, Tertiary , Genome
12.
Funct Integr Genomics ; 23(3): 245, 2023 Jul 17.
Article in English | MEDLINE | ID: mdl-37460717

ABSTRACT

Enterobacter species are considered to be an opportunistic human pathogen owing to the existence of antibiotic-resistant strains and drug resides; however, the detailed analysis of the antibiotic resistance and virulence features in environmental isolates is poorly characterized. Here, in the study, we characterized the biochemical characteristics, and genome, pan-genome, and comparative genome analyses of an environmental isolate Enterobacter sp. S-16. The strain was identified as Enterobacter spp. by using 16S rRNA gene sequencing. To unravel genomic features, whole genome of Enterobacter sp. S-16 was sequenced using a hybrid assembly approach and genome assembly was performed using the Unicycler tool. The assembled genome contained the single conting size 5.3 Mbp, GC content 55.43%, and 4500 protein-coding genes. The genome analysis revealed the various gene clusters associated with virulence, antibiotic resistance, type VI secretion system (T6SS), and many stress tolerant genes, which may provide important insight for adapting to changing environment conditions. Moreover, different metabolic pathways were identified that potentially contribute to environmental survival. Various hydrolytic enzymes and motility functions equipped the strain S-16 as an active colonizer. The genome analysis confirms the presence of carbohydrate-active enzymes (CAZymes), and non-enzymatic carbohydrate-binding modules (CBMs) involved in the hydrolysis of complex carbohydrate polymers. Moreover, the pan-genome analysis provides detailed information about the core genes and shared genes with the closest related Enterobacter species. The present study is the first report showing the presence of YdhE/NorM in Enterobacter spp. Thus, the elucidation of genome sequencing will increase our understanding of the pathogenic nature of environmental isolate, supporting the One Health Concept.


Subject(s)
Enterobacter , Genome, Bacterial , Humans , Enterobacter/genetics , RNA, Ribosomal, 16S , Genomics , Carbohydrates , Phylogeny
13.
BMC Microbiol ; 23(1): 192, 2023 07 18.
Article in English | MEDLINE | ID: mdl-37464310

ABSTRACT

BACKGROUND: Members of Paenibacillus genus from diverse habitats have attracted great attention due to their multifarious properties. Considering that members of this genus are mostly free-living in soil, we characterized the genome of a halotolerant environmental isolate belonging to the genus Paenibacillus. The genome mining unravelled the presence of CAZymes, probiotic, and stress-protected genes that suggested strain S-12 for industrial and agricultural purposes. RESULTS: Molecular identification by 16 S rRNA gene sequencing showed its closest match to other Paenibacillus species. The complete genome size of S-12 was 5.69 Mb, with a GC-content 46.5%. The genome analysis of S-12 unravelled the presence of an open reading frame (ORF) encoding the functions related to environmental stress tolerance, adhesion processes, multidrug efflux systems, and heavy metal resistance. Genome annotation identified the various genes for chemotaxis, flagellar motility, and biofilm production, illustrating its strong colonization ability. CONCLUSION: The current findings provides the in-depth investigation of a probiotic Paenibacillus bacterium that possessed various genome features that enable the bacterium to survive under diverse conditions. The strain shows the strong ability for probiotic application purposes.


Subject(s)
Paenibacillus , Rauwolfia , Rauwolfia/genetics , Paenibacillus/genetics , Base Composition , Phylogeny , RNA, Ribosomal, 16S/genetics , DNA, Bacterial/genetics , Sequence Analysis, DNA , Fatty Acids , Soil Microbiology
14.
Front Microbiol ; 14: 1140249, 2023.
Article in English | MEDLINE | ID: mdl-37408640

ABSTRACT

A metal-resistant bacterium Pseudomonas parafulva OS-1 was isolated from waste-contaminated soil in Ranchi City, India. The isolated strain OS-1 showed its growth at 25-45°C, pH 5.0-9.0, and in the presence of ZnSO4 (upto 5 mM). Phylogenetic analysis based on 16S rRNA gene sequences revealed that strain OS-1 belonged to the genus Pseudomonas and was most closely related to parafulva species. To unravel the genomic features, we sequenced the complete genome of P. parafulva OS-1 using Illumina HiSeq 4,000 sequencing platform. The results of average nucleotide identity (ANI) analysis indicated the closest similarity of OS-1 to P. parafulva PRS09-11288 and P. parafulva DTSP2. The metabolic potential of P. parafulva OS-1 based on Clusters of Othologous Genes (COG) and Kyoto Encyclopedia of Genes and Genomes (KEGG) indicated a high number of genes related to stress protection, metal resistance, and multiple drug-efflux, etc., which is relatively rare in P. parafulva strains. Compared with other parafulva strains, P. parafulva OS-1 was found to have the unique ß-lactam resistance and type VI secretion system (T6SS) gene. Additionally, its genomes encode various CAZymes such as glycoside hydrolases and other genes associated with lignocellulose breakdown, suggesting that strain OS-1 have strong biomass degradation potential. The presence of genomic complexity in the OS-1 genome indicates that horizontal gene transfer (HGT) might happen during evolution. Therefore, genomic and comparative genome analysis of parafulva strains is valuable for further understanding the mechanism of resistance to metal stress and opens a perspective to exploit a newly isolated bacterium for biotechnological applications.

15.
Indian J Ophthalmol ; 71(7): 2656-2661, 2023 Jul.
Article in English | MEDLINE | ID: mdl-37417103

ABSTRACT

Cataract surgery requires a well-dilated and stable pupil for a good outcome. Unexpected pupillary constriction during surgery increases the risk of complication. This problem is more pronounced in children. There are now pharmacological interventions that help tackle this unforeseen happening. Our review discusses the simple and quick options available to a cataract surgeon when faced with this dilemma. As cataract surgical techniques continue to improvise and get faster, an adequate pupil size is of paramount importance. Various topical and intra-cameral drugs are used in combination to achieve mydriasis. Despite good pre-operative dilation, the pupil can be quite unpredictable during surgery. Intra-operative miosis limits the field of surgery and increases the risk of complications. For example, if the pupil size decreases from 7 mm to 6 mm, this 1 mm change in pupil diameter will lead to a decrease of 10.2 mm2 in the area of surgical field. Making a good capsulorhexis with a small pupil can be a challenge, even for an experienced surgeon. Repeated touching of the iris increases the risk of fibrinous complications. Removal of cataract and the cortical matter becomes increasingly difficult. Intra-ocular lens implantation in the bag also requires adequate dilation. When dealing with challenging cases like lens subluxation, pseudo-exfoliation, and zonular dehiscence, a small pupil further increases the risk and adversely affects the surgical outcome. Hence, achieving and maintaining adequate mydriasis throughout surgery is essential. This review highlights the risk factors for small pupils during surgery and current management strategies.


Subject(s)
Cataract Extraction , Cataract , Mydriasis , Phacoemulsification , Child , Humans , Mydriasis/complications , Cataract Extraction/adverse effects , Cataract Extraction/methods , Miosis/complications , Pupil , Cataract/complications , Phacoemulsification/methods
16.
Reprod Sci ; 30(11): 3339-3352, 2023 11.
Article in English | MEDLINE | ID: mdl-37322320

ABSTRACT

Male reproductive functions and bone health are both adversely affected by the high salt diet (HSD). Nevertheless, the underlying mechanism via which it alters the sperm function remains largely unknown. This study examines the mechanism by which HSD affects male fertility by impairing bone health. For investigating the same, male BALB/c mice were categorized into three groups-HSD group (fed with 4% NaCl), a low salt diet (LSD) group (fed with 0.4% NaCl), and a control group (fed with a normal diet) for 6 weeks and thereafter assessed for various sperm parameters, bone turnover markers, and testosterone levels. Furthermore, the quantitative assessment of testosterone biosynthesis enzymes was performed. Interestingly, we observed that mice fed with HSD showed significant alterations in sperm parameters-motility, count, and vitality, including morphological changes compared to both the LSD and the control groups. In addition, serum analysis showed an increase in bone resorption markers and a decrease in bone formation markers in the HSD group (p < 0.05). Further, HSD caused a decrease in the testosterone level and mRNA expression of testosterone biosynthesis enzymes. Importantly, a significant decrease in bone formation marker osteocalcin (OC) was observed to coincide with the dip in testosterone level in the HSD group. Given that OC plays a key role in maintaining male fertility, the above findings suggest that a decrease in OC levels may affect the testosterone biosynthesis pathway, reducing testosterone hormone secretion and thereby resulting in decreased spermatogenesis. The study for the first time delineates and bridges the mechanism of HSD-mediated bone loss (results in a deficiency of OC) with decreased testosterone biosynthesis and thus impaired male fertility.


Subject(s)
Semen , Sodium Chloride , Mice , Male , Animals , Sodium Chloride/metabolism , Semen/metabolism , Testosterone , Sodium Chloride, Dietary/adverse effects , Fertility , Diet/adverse effects , Homeostasis , Testis/metabolism
17.
Curr Microbiol ; 80(6): 202, 2023 May 05.
Article in English | MEDLINE | ID: mdl-37145205

ABSTRACT

Acinetobacter species is currently ranked as high-priority pathogen for their extraordinary ability to become resistant to almost all existing antibiotics. The diverse range of effectors secreted by Acinetobacter spp. constitutes a significant proportion of the virulence arsenal. Therefore, our study aims to characterize the secretome of Acinetobacter pittii S-30. Analysis of extracellular secreted proteins of A. pittii S-30 revealed the presence of transporter proteins, outer membrane proteins, molecular chaperones, porins, and several proteins of unknown function. Additionally, proteins related to metabolism, as well as those involved in gene expression and protein translation, type VI secretion system (T6SS) proteins, and stress response-related proteins were also identified in the secretome. The comprehensive analysis of secretome revealed putative protein antigens which could elicit substantial immune response. The limited availability of effective antibiotics and the worldwide growth of secretome data make this approach appealing in the development of effective vaccines against Acinetobacter and other bacterial pathogens.


Subject(s)
Acinetobacter Infections , Acinetobacter , Humans , Acinetobacter Infections/microbiology , Secretome , Acinetobacter/genetics , Anti-Bacterial Agents/pharmacology , Bacterial Proteins/genetics , Bacterial Proteins/metabolism
18.
Microbiol Resour Announc ; 12(6): e0023823, 2023 Jun 20.
Article in English | MEDLINE | ID: mdl-37212706

ABSTRACT

Staphylococcus aureus is a major opportunistic pathogen that causes infections in various animals, including humans. Here, we report a genome sequence of an environmental isolate, S. aureus OS-6. The genome consists of a circular 2,808,665-bp chromosome with a G+C content of 32.7%.

20.
Curr Microbiol ; 80(3): 88, 2023 Jan 31.
Article in English | MEDLINE | ID: mdl-36719538

ABSTRACT

Members of the Enterobacter genus include many pathogenic microbes of humans and plants, secrete proteins that contribute to the interactions of bacteria and their environment. Therefore, understanding of secreted proteins is vital to understand bacterial physiology and behavior. Here, we explored the secretome of an environmental isolate Enterobacter sp. S-16 by nanoLC-MS/MS and identified 572 proteins in the culture supernatant. Gene ontology (GO) analysis indicated that proteins were related to biological processes, molecular as well as cellular functions. The majority of the identified proteins are involved in microbial metabolism, chemotaxis & motility, flagellar hook-associated proteins, biosynthesis of antibiotics, and molecular chaperones to assist the protein folding. Bioinformatics analysis of the secretome revealed the presence of type I and type VI secretion system proteins. Presence of these diverse secretion system proteins in Enterobacter sp. S-16 are likely to be involved in the transport of various proteins including nutrient acquisition, adhesion, colonization, and homeostasis maintenance. Among the secreted bacterial proteins with industrial importance, lignocellulolytic enzymes play a major role, therefore, we analyzed our secretome results for any presence of glycoside hydrolases (GHs) and other hydrolytic enzymes (CAZymes). Overall, the secreted proteins may be considered an attractive reservoir of potential antigens for drug development, diagnostic markers, and other biomedical applications.


Subject(s)
Tandem Mass Spectrometry , Virulence Factors , Humans , Bacterial Proteins/genetics , Bacterial Proteins/metabolism , Glycoside Hydrolases , Virulence Factors/genetics , Enterobacter/isolation & purification
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