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ObjectiveDefinitive guidance regarding the duration of antibiotics for neonatal sepsis is lacking. We hypothesised that a 7-day antibiotic course is non-inferior to a 14-day course for treating culture-proven sepsis.DesignRandomised, controlled, non-inferiority trial with masked outcome assessment in eight centres in a low and middle-income country.PatientsNeonates with a birth weight (BW) ≥1000 g and blood culture-proven sepsis were randomised on day 7 of sensitive antibiotic therapy provided sepsis had clinically remitted. Exclusions: Staphylococcus aureus or fungal sepsis, and infections requiring prolonged antibiotics. We planned to enrol 350 per group, assuming 10% rate of primary outcome, +7% non-inferiority margin, one-sided 5% alpha, 90% power, 10% loss to follow-up.Intervention7 days (no further treatment); comparison: 14 days (7 days postrandomisation).OutcomesPrimary: relapse (definite or probable) within day 21 postantibiotic completion. Secondary outcomes: composite of mortality or definite/probable/secondary sepsis and duration of hospitalisation. One interim analysis (per protocol (PP)) was planned.Results126 and 135 subjects were recruited in 7-day and 14-day groups, respectively, with mean (SD) birth weight (BW) 2250.9 (741.1) and 2187.8 (718.8) g. The trial was terminated early, based on interim PP analysis. 2/125 and 6/130 subjects had the primary outcome in 7-day and 14-day groups, respectively (risk difference (RD)=−3.0% (99.5% CI −9.2%, +3.1%), below non-inferiority margin). The composite secondary outcome also favoured the 7-day regimen (RD: −3.7% (99.5% CI −12.4% to +5.1%)). Duration of hospitalisation was shorter in 7-day group (median difference: −4 days (95% CI −5 to –3)).ConclusionsA 7-day course of antibiotics may be non-inferior to a 14-day course for uncomplicated bacterial neonatal sepsis.Trial registration number NCT03280147.

Immune checkpoint blockade (ICB) has improved outcomes for patients with advanced cancer, but the determinants of response remain poorly understood. Here we report differential effects of mutations in the homologous recombination genes BRCA1 and BRCA2 on response to ICB in mouse and human tumors, and further show that truncating mutations in BRCA2 are associated with superior response compared to those in BRCA1. Mutations in BRCA1 and BRCA2 result in distinct mutational landscapes and differentially modulate the tumor-immune microenvironment, with gene expression programs related to both adaptive and innate immunity enriched in BRCA2-deficient tumors. Single-cell RNA sequencing further revealed distinct T cell, natural killer, macrophage, and dendritic cell populations enriched in BRCA2-deficient tumors. Taken together, our findings reveal the divergent effects of BRCA1 and BRCA2-deficiency on ICB outcome, and have significant implications for elucidating the genetic and microenvironmental determinants of response to immunotherapy.

Biodesulfurization helps in removal of sulfur from organosulfur present in petroleum fractions. All microorganisms isolated to date harbor a desulfurization operon consisting of three genes dszA, -B and -C which encode for monooxygenases (DszA & C) and desulfinase (DszB). Most of the studies have been carried out using dibenzothiophene as the model organosulfur compound, which is converted into 2 hydroxybiphenyl by a 4S pathway which maintains the calorific value of fuel. There are few studies reported on the regulation of this operon. However, there are no reports on the proteins which can enhance the activity of the operon. In the present study, we used in vitro and in vivo methods to identify a novel TetR family transcriptional regulator from Gordonia sp. IITR100 which functions as an activator of the dsz operon. Activation by TetR family regulator resulted in enhanced levels of desulfurization enzymes in Gordonia sp. IITR100. Activation was observed only when the 385 bp full length promoter was used. Upstream sequences between − 385 and − 315 were found to be responsible for activation. We provide evidence that the TetR family transcription regulator serves as an activator in other biodesulfurizing microorganisms such as Rhodococcus erythropolis IGTS8 and heterologous host Escherichia coli. This is the first report on the isolation of a possible transcriptional regulator that activates the desulfurization operon resulting in improved biodesulfurization.

Recent studies show gut microbiota modulate antitumor immune responses; one proposed mechanism is cross-reactivity between antigens expressed in commensal bacteria and neoepitopes. We found that T cells targeting an epitope called SVYRYYGL (SVY), expressed in the commensal bacterium Bifidobacterium breve ( B . breve ), cross-react with a model neoantigen, SIYRYYGL (SIY). Mice lacking B . breve had decreased SVY-reactive T cells compared with B . breve –colonized mice, and the T cell response was transferable by SVY immunization or by cohousing mice without Bifidobacterium with ones colonized with Bifidobacterium . Tumors expressing the model SIY neoantigen also grew faster in mice lacking B . breve compared with Bifidobacterium -colonized animals. B . breve colonization also shaped the SVY-reactive TCR repertoire. Finally, SVY-specific T cells recognized SIY-expressing melanomas in vivo and led to decreased tumor growth and extended survival. Our work demonstrates that commensal bacteria can stimulate antitumor immune responses via cross-reactivity and how bacterial antigens affect the T cell landscape.

Cyber crimes against women are on the raise and women have been drastically victimized in the cyberspace. Some perpetrators try to defame women by sending obscene e-mails, stalking women by using chat rooms, websites etc, developing pornographic videos where women are depicted in compromising positions mostly created without their consent, spoofing e-mails, morphing of images for pornographic content etc. The sex-offenders look for their victims on social network websites, and also on job or marriage websites where people post their personal information for better prospect. The revealing of personal information has made women more a casualty of cyber crime. It is evident that victimization of women is leading to cyber crime and vice versa. While there are many instances where women in western countries are victimized, there is a raise of such victimization of women in the eastern regions such as India and these women are relatively with less legal protection and they are unique than their western counterparts (Halder & Jaishankar, 2008, 2009, 2011b). This paper attempts to find out the various reasons behind the fact as to why Indian women are being victimized and a conceptual model of cyber victimization of Indian women is proposed.

Tumor progression is associated with overstimulation of cytotoxic T lymphocytes (CTLs), resulting in a dysfunctional state of exhaustion. How T cell exhaustion is elicited in the tumor remains poorly understood. Here we show that tumor-associated macrophages (TAMs) present cancer cell antigen and induce CTL exhaustion through a gene expression program dependent on the transcription factor interferon regulatory factor-8 (IRF8). In a transgenic model of murine breast cancer, CTL priming was supported by IRF8-dependent dendritic cells; yet, CTL exhaustion required TAM expression of IRF8, and its ablation suppressed tumor growth. An analysis of the highly immune-infiltrated human renal cell carcinoma tumors revealed abundant TAMs that expressed IRF8 and were enriched for an IRF8 gene expression signature. The IRF8 signature co-segregated with T cell exhaustion markers and was negatively associated with long-term patient survival. Thus, CTL exhaustion is promoted by TAMs via IRF8, and this crosstalk may be disrupted in TAM-targeted therapies.