Quorum Sensing Mediates Interaction with In Vitro.

and are opportunistic pathogens that cause severe infections in hospitals, and their co-infections are increasingly reported. The interspecies interactions between these two bacterial species and their potential impacts on infections are largely unexplored. In this study, we first demonstrated that inhibits the growth of by iron chelating via quorum sensing.

Structure and catalytic mechanism of exogenous fatty acid recycling by AasS, a versatile acyl-ACP synthetase.

Fatty acids (FAs) are essential building blocks for all the domains of life, of which bacterial de novo synthesis, called type II FA synthesis (FAS II), is energetically expensive. The recycling of exogenous FAs (eFAs) partially relieves the FAS II demand and, therefore, compromises the efficacy of FAS II-directed antimicrobials. The versatile acyl-acyl carrier protein (ACP) synthetase, AasS, enables bacterial channeling of diverse eFA nutrients through holo-ACP, an activated form of ACP.

Comparing acute versus AIDS ART initiation on HIV-1 integration sites and clonal expansion.

Early antiretroviral therapy (ART) initiation is known to limit the establishment of the HIV reservoir, with studies suggesting benefits such as a reduced number of infected cells and a smaller latent reservoir. However, the long-term impact of early ART initiation on the dynamics of the infected cell pool remains unclear, and clinical evidence directly comparing proviral integration site counts between early and late ART initiation is limited. In this study, we used Linear Target Amplification-PCR (LTA-PCR) and Next Generation Sequencing to compare unique integration site (UIS) clonal counts between individuals who initiated ART during acute HIV infection stage (Acute-ART group) and those in the AIDS stage (AIDS-ART group).

Choline metabolism modulates cyclic-di-GMP signaling and virulence of Pseudomonas aeruginosa in a macrophage infection model.

Background: Bacterial pathogens frequently encounter host-derived metabolites during their colonization and invasion processes, which can serve as nutrients, antimicrobial agents, or signaling molecules for the pathogens. The essential nutrient choline (Cho) is widely known to be utilized by a diverse range of bacteria and may undergo conversion into the disease-associated metabolite trimethylamine (TMA). However, the impact of choline metabolism on bacterial physiology and virulence remains largely unexplored.

Generation of vascularized pancreatic progenitors through co-differentiation of endoderm and mesoderm from human pluripotent stem cells.

Background: The simultaneous differentiation of human pluripotent stem cells (hPSCs) into both endodermal and mesodermal lineages is crucial for developing complex, vascularized tissues, yet poses significant challenges. This study explores a method for co-differentiation of mesoderm and endoderm, and their subsequent differentiation into pancreatic progenitors (PP) with endothelial cells (EC).

Methods: Two hPSC lines were utilized.

Tuberculosis Caused by Isoniazid-Resistant Strain Was Transmitted from a Woman Undergoing IVFET to Her Fetus by Intrauterine: A Case Report.

Background: Tuberculosis (TB) among women and infants during the perinatal period is not rare, particularly in countries with a high TB burden. And the risk would increase significantly following in vitro fertilization-embryo transfer (IVFET). Worse still, TB in this stage is apt to develop into severe forms in women and neonates, such as disseminated TB or tuberculous meningitis (TBM).

A bacterial methyltransferase that initiates biotin synthesis, an attractive anti-ESKAPE druggable pathway.

The covalently attached cofactor biotin plays pivotal roles in central metabolism. The top-priority ESKAPE-type pathogens, and , constitute a public health challenge of global concern. Despite the fact that the late step of biotin synthesis is a validated anti-ESKAPE drug target, the primary stage remains fragmentarily understood.

CDCM: a correlation-dependent connectivity map approach to rapidly screen drugs during outbreaks of infectious diseases.

In the context of the global damage caused by coronavirus disease 2019 (COVID-19) and the emergence of the monkeypox virus (MPXV) outbreak as a public health emergency of international concern, research into methods that can rapidly test potential therapeutics during an outbreak of a new infectious disease is urgently needed. Computational drug discovery is an effective way to solve such problems. The existence of various large open databases has mitigated the time and resource consumption of traditional drug development and improved the speed of drug discovery.

Protective Impact of Influenza Vaccination on Healthcare Workers.

Background: Influenza vaccine uptake among healthcare workers is crucial for preventing influenza infections, yet its effectiveness needs further investigation.

Objectives: This prospective observational study aimed to assess the protective effect of influenza vaccination among healthcare workers in Shenzhen.

Methods: We enrolled 100 participants, with 50 receiving the 2023-2024 quadrivalent influenza vaccine (QIV) and 50 serving as unvaccinated controls.

[Clinical application of targeted next generation sequencing in detecting rifampicin and rifabutin resistance in tuberculosis patients].

To evaluate the clinical value of targeted next generation sequencing (tNGS) in diagnosing rifampicin and rifabutin resistance in tuberculosis patients. In this retrospective cohort study, 119 culture-positive Mycobacterium (MTB) strains from tuberculosis patients in Shenzhen Third People's Hospital from 2020 to 2023 were collected, then tNGS was performed to detect mutations of rpoB gene. Fourteen different types of rpoB gene mutation were detected in 46 mutation MTB strains, including 43 resistance related mutations and 3 synonymous mutations at codon 529.

Sequential Immune Acquisition of Monoclonal Antibodies Enhances Phagocytosis of by Recognizing ATP Synthase.

: The aim of this study was to prepare monoclonal antibodies (mAbs) that broadly target and protect against infection by multi-drug-resistant (MDR) from different sources. : mAb 8E6 and mAb 1B5 were prepared by sequentially immunizing mice with a sublethal inoculation of three heterogeneous serotypes of pan-drug-resistant (PDR) , ST-208, ST-195, and ST-229. : The cross-recognition of heterogeneous bacteria (n = 13) by two mAbs and potential targets was verified, and the in vitro antibacterial efficacy of mAbs was assessed.

TREM2 aggravates sepsis by inhibiting fatty acid oxidation via the SHP1/BTK axis.

Impaired fatty acid oxidation (FAO) and the therapeutic benefits of FAO restoration have been revealed in sepsis. However, the regulatory factors contributing to FAO dysfunction during sepsis remain inadequately clarified. In this study, we identified a subset of lipid-associated macrophages characterized by high expression of trigger receptor expressed on myeloid cells 2 (TREM2) and demonstrated that TREM2 acted as a suppressor of FAO to increase the susceptibility to sepsis.

scBubbletree: computational approach for visualization of single cell RNA-seq data.

Background: Visualization approaches transform high-dimensional data from single cell RNA sequencing (scRNA-seq) experiments into two-dimensional plots that are used for analysis of cell relationships, and as a means of reporting biological insights. Yet, many standard approaches generate visuals that suffer from overplotting, lack of quantitative information, and distort global and local properties of biological patterns relative to the original high-dimensional space.

Results: We present scBubbletree, a new, scalable method for visualization of scRNA-seq data.

An IGHG1 variant exhibits polarized prevalence and confers enhanced IgG1 antibody responses against life-threatening organisms.

Evolutionary pressures sculpt population genetics, whereas immune adaptation fortifies humans against life-threatening organisms. How the evolution of selective genetic variation in adaptive immune receptors orchestrates the adaptation of human populations to contextual perturbations remains elusive. Here, we show that the G396R coding variant within the human immunoglobulin G1 (IgG1) heavy chain presents a concentrated prevalence in Southeast Asian populations.

Hfq-binding small RNA PqsS regulates Pseudomonas aeruginosa pqs quorum sensing system and virulence.

Pseudomonas aeruginosa is a widespread nosocomial pathogen with a significant to cause both severe planktonic acute and biofilm-related chronic infections. Small RNAs (sRNAs) are noncoding regulatory molecules that are stabilized by the RNA chaperone Hfq to trigger various virulence-related signaling pathways. Here, we identified an Hfq-binding sRNA in P.

Extraction of Bacterial Membrane Vesicle and Phage Complex by Density Gradient Ultracentrifugation.

The bacterial membrane vesicles (MVs) are non-replicative, nanoscale structures that carry specific cargos and play multiple roles in microbe-host interactions. An appropriate MV isolation method that mimics complex pathogen infections in vivo is needed. After bacterial MVs extraction, flagella or pili can be frequently observed along with MVs by transmission electron microscope (TEM).