MraZ Regulates Multiple Genes within and Outside of the Operon during Hypoxia.

is the most ancient human tuberculosis pathogen and has been the leading cause of death from bacterial infectious diseases throughout human history. According to the World Health Organization Global Tuberculosis Report, in 2022, 7.5 million new tuberculosis cases were identified, marking the highest number of cases since the World Health Organization initiated its worldwide tuberculosis surveillance program in 1995.

Drug repurposing: An antidiabetic drug Ipragliflozin as Mycobacterium tuberculosis sirtuin-like protein inhibitor that synergizes with anti-tuberculosis drug isoniazid.

The surge of drug-resistant Mycobacterium tuberculosis (DR-TB) impedes the World Health Organization's efforts in ending TB and calls for new therapeutic formulations. M. tuberculosis sirtuin-like protein Rv1151c is a bifunctional enzyme with both deacetylation and desuccinylation activities, which plays an important role in M.

Mycobacterium LacI-type Transcription Regulator Rv3575c Affects Host Innate Immunity by Regulating Bacterial Operon-Mediated Cholesterol Transport.

has evolved a highly specialized system to snatch essential nutrients from its host, among which host-derived cholesterol has been established as one main carbon source for to survive within granulomas. The uptake, catabolism, and utilization of cholesterol are important for to sustain within the host largely via remodeling of the bacterial cell walls. However, the regulatory mechanism of cholesterol uptake and its impact on bacterium fate within infected hosts remain elusive.

Extracellular Vesicles from Nanomedicine-Trained Intestinal Microbiota Substitute for Fecal Microbiota Transplant in Treating Ulcerative Colitis.

The biosafety concerns associated with fecal microbiota transplant (FMT) limit their clinical application in treating ulcerative colitis (UC). Gut microbiota secrete abundant extracellular vesicles (Gm-EVs), which play a critical role in bacteria-to-bacteria and bacteria-to-host communications. Herein, intestinal microbiota are trained using tea leaf lipid/pluronic F127-coated curcumin nanocrystals (CN@Lps), which can maintain stability during transit through the gastrointestinal tract.

A far-ultraviolet-driven photoevaporation flow observed in a protoplanetary disk.

Most low-mass stars form in stellar clusters that also contain massive stars, which are sources of far-ultraviolet (FUV) radiation. Theoretical models predict that this FUV radiation produces photodissociation regions (PDRs) on the surfaces of protoplanetary disks around low-mass stars, which affects planet formation within the disks. We report James Webb Space Telescope and Atacama Large Millimeter Array observations of a FUV-irradiated protoplanetary disk in the Orion Nebula.

Characterization and genome analysis of G1 sub-cluster mycobacteriophage Lang.

Phage therapy is revitalized as an alternative to antibiotics therapy against antimicrobials resistant pathogens. Mycobacteriophages are genetically diverse viruses that can specifically infect Mycobacterium genus including Mycobacterium tuberculosis and Mycobacterium smegmatis. Here, we isolated and annotated the genome of a mycobacteriophage Lang, a temperate mycobacteriophage isolated from the soil of Hohhot, Inner Mongolia, China, by using Mycolicibacterium smegmatis mc 155 as the host.

Protein post-translational modification by lysine succinylation: Biochemistry, biological implications, and therapeutic opportunities.

Lysine succinylation (Ksuc) is a novel protein post-translational modification (PTM) wherein a succinyl group modifies a lysine residue. Ksuc leads to significant chemical and structural changes to the modified protein. Recent studies have shown that Ksuc might play an important role in organism physiology and some pathophysiological processes, such as tumorigenesis and metabolic diseases.

Insertion Mutation of Play an Important Role in Resistance of to Mycobacteriophage SWU1.

Purpose: Phage is a new choice for the treatment of multi-drug-resistant bacteria, and phage resistance is also an issue of concern. SWU1 is a mycobacteriophage, and the mechanism of its resistance remain poorly understood.

Methods: The mutant strains which were stably resistant to SWU1 were screened by transposon mutation library.

Mycobacterium Lrp/AsnC family transcriptional factor modulates the arginase pathway as both a sensor and a transcriptional repressor.

L-Arginine is the precursor of nitric oxide (NO), a host immune effector against intracellular pathogens including Mycobacterium tuberculosis (M. tb). Pathogens including M.

Gas phase formation of carbon cluster (fullerenes and graphenes)/prebiotic sugar complexes.

Among the constituent molecular classes of proteins and nucleic acids, the presence of Ribose and deoxy-Ribose in space remains unclear. Here, we provide experimental evidence of astronomically related sugar derivatives - carbon cluster (fullerenes and graphenes)/prebiotic sugar complexes - and study their formation processes in the gas phase. The results show that, with PAH cations (dicoronylene, DC, C48H20+)/(2-deoxy-d-Ribose, dR, C5H10O4, and dehydrated 2-deoxy-d-Ribose, DedR, C5H8O3) and fullerene cations (C60+)/(dR and DedR) as the initial molecular precursors, two series of graphene-prebiotic sugar cluster cations (graphene/dR and graphene/DedR, e.

Von Willebrand factor protein MSMEG_3641 is involved in biofilm formation and intracellular survival.

biofilm is associated with the virulence and persistence capability. Our aim is to delineate factors involved in biofilms development. We performed transposon mutants screen and found that mutation of MSMEG_3641, a homolog of Rv1836c, can change colony morphology and biofilm.

Clinical characteristics and prognostic factors of male yolk sac tumor: a Surveillance, Epidemiology, and End Results program study.

Introduction: Yolk sac tumor (YST) is a rare malignant germ cell tumor, which usually affects young males. Because of the low incidence, few studies on YST have been published. In our study, we aim to investigate the clinical characteristics, survival and risk factors of male YST patients based on the Surveillance, Epidemiology, and End Results (SEER) program.

L-Alanine specifically potentiates fluoroquinolone efficacy against Mycobacterium persisters via increased intracellular reactive oxygen species.

Tuberculosis caused by Mycobacterium tuberculosis remains a major global health concern; M. tuberculosis drug resistance and persistence further fueled the situation. Nutrient supportive therapy was intensively pursued to complement the conventional treatment, as well as their synergy with current antibiotics.

Mycobacterium tuberculosis Rv0426c promotes recombinant mycobacteria intracellular survival via manipulating host inflammatory cytokines and suppressing cell apoptosis.

Tuberculosis (TB), caused by Mycobacterium tuberculosis (Mtb) is still a leading cause of death worldwide. M. tuberculosis has evolved multipronged strategies to subvert host immune defenses and establish an immunologically privileged niche in macrophages.

Role of two-component regulatory systems in intracellular survival of Mycobacterium tuberculosis.

The typical two-component regulatory systems (TCSs), consisting of response regulator and histidine kinase, play a central role in survival of pathogenic bacteria under stress conditions such as nutrient starvation, hypoxia, and nitrosative stress. A total of 11 complete paired two-component regulatory systems have been found in Mycobacterium tuberculosis, including a few isolated kinase and regulatory genes. Increasing evidence has shown that TCSs are closely associated with multiple physiological process like intracellular persistence, pathogenicity, and metabolism.

Mce-associated protein Rv0177 alters the cell wall structure of Mycobacterium smegmatis and promotes macrophage apoptosis via regulating the cytokines.

The success of Mycobacterium tuberculosis as a pathogen largely contributes to its ability to infect, modify and persist within the host cells. M. tuberculosis Rv0177 is a gene of the mce1 operon (Mammalian cell entry), encoding a conserved hypothetical protein, essential for M.

Clinical Analysis of Unicentric Castleman's Disease with Paraneoplastic Pemphigus and Bronchiolitis Obliterans.

Objective To investigate the clinical features of unicentric Castleman's disease(UCD)with paraneoplastic pemphigus(PNP)and bronchiolitis obliterans(BO).Method Data of UCD patients with PNP and BO from Peking Union Medical College Hospital were retrospectively analyzed,along with literatures review. Results Totally 23 cases(11 males and 12 females)were enrolled.

The clinical spectrum of IgM monoclonal gammopathy: A single center retrospective study of 377 patients.

Objectives: We retrospectively evaluated the clinical features, serum levels of IgM, and prevalence of IgM related diseases in patients with serum immunofixation electrophoresis (sIFE) confirmed IgM monoclonal gammopathy at our center.

Methods: We included patients with sIFE confirmed IgM monoclonal gammopathy between January 2008 and December 2014 in this retrospective study. We evaluated clinical data, sIFE, serum IgM levels, and diagnosis.

VUV photo-processing of PAH cations: quantitative study on the ionization versus fragmentation processes.

Interstellar polycyclic aromatic hydrocarbons (PAHs) are strongly affected by the absorption of vacuum ultraviolet (VUV) photons in the interstellar medium (ISM), yet the branching ratio between ionization and fragmentation is poorly studied. This is crucial for the stability and charge state of PAHs in the ISM in different environments, affecting in turn the chemistry, the energy balance, and the contribution of PAHs to the extinction and emission curves. We studied the interaction of PAH cations with VUV photons in the 7 - 20 eV range from the synchrotron SOLEIL beamline, DESIRS.

An optical spectrum of a large isolated gas-phase PAH cation: CH.

A gas-phase optical spectrum of a large polycyclic aromatic hydrocarbon (PAH) cation - CH- in the 410-610 nm range is presented. This large all-benzenoid PAH should be large enough to be stable with respect to photodissociation in the harsh conditions prevailing in the interstellar medium (ISM). The spectrum is obtained via multi-photon dissociation (MPD) spectroscopy of cationic CH stored in the Fourier Transform Ion Cyclotron Resonance (FT-ICR) cell using the radiation from a mid-band optical parametric oscillator (OPO) laser.

LABORATORY PHOTO-CHEMISTRY OF PAHS: IONIZATION VERSUS FRAGMENTATION.

Interstellar Polycyclic Aromatic Hydrocarbons (PAH) are expected to be strongly processed by Vacuum Ultra-Violet (VUV) photons. Here, we report experimental studies on the ionization and fragmentation of coronene (CH), ovalene (CH) and hexa-peri-hexabenzocoronene (HBC; CH) cations by exposure to synchrotron radiation in the range of 8-40 eV. The results show that for small PAH cations such as coronene, fragmentation (H-loss) is more important than ionization.

Photolysis of n-butyl nitrite and isoamyl nitrite at 355 nm: a time-resolved Fourier transform infrared emission spectroscopy and ab initio study.

We report on the photodissociation dynamics study of n-butyl nitrite and isoamyl nitrite by means of time-resolved Fourier transform infrared (TR-FTIR) emission spectroscopy. The obtained TR-FTIR emission spectra of the nascent NO fragments produced in the 355 nm laser photolysis of the two alkyl nitrite species showed an almost identical rotational temperature and vibrational distributions of NO. In addition, a close resemblance between the two species was also found in the measured temporal profiles of the IR emission of NO and the recorded UV absorption spectra.