Characterization of a Novel KPC-2 Variant, KPC-228, Conferring Resistance to Ceftazidime-Avibactam in an ST11-KL64 Hypervirulent Klebsiella pneumoniae.

With the widespread clinical use of ceftazidime-avibactam (CZA), reports of resistance have increased continuously, posing immense threats to public health worldwide. In this study, we explored the underlying mechanisms leading to the development of CZA resistance in an ST11-KL64 hypervirulent Klebsiella pneumoniae CRE146 that harbored the bla gene. Twelve carbapenem-resistant Klebsiella pneumoniae (CRKP) strains were isolated from the same patient, including K.

Variants in EP400, encoding a chromatin remodeler, cause epilepsy with neurodevelopmental disorders.

EP400 encodes a core catalytic ATPase subunit of ATP-dependent chromatin remodeling complexes. The gene-disease association of EP400 is undetermined. In this study, we performed trio-based whole-exome sequencing in a cohort of 402 families with epilepsy and neurodevelopmental disorders (NDDs) and identified compound heterozygous EP400 variants in six unrelated individuals.

Clinical and dosimetric feasibility of sparing submandibular gland in patients with oral cavity squamous cell carcinoma.

Background: To investigate the incidence of submandibular gland (SMG) involvement and explore the feasibility of sparing SMG in the oral cavity squamous cell carcinoma (OSCC).

Methods: This study retrospectively analyzed patients between January 2018 to October 2022. Ten patients with tongue squamous cell carcinoma receiving postoperative radiotherapy were replanned to investigate the feasibility of sparing SMG.

Gastrointestinal jumbo phages possess independent synthesis and utilization systems of NAD.

Background: Jumbo phages, phages with genomes > 200 kbp, contain some unique genes for successful reproduction in their bacterial hosts. Due to complex and massive genomes analogous to those of small-celled bacteria, how jumbo phages complete their life cycle remains largely undefined.

Results: In this study, we assembled 668 high-quality jumbo phage genomes from over 15 terabytes (TB) of intestinal metagenomic data from 955 samples of 5 animal species (cow, sheep, pig, horse, and deer).

MsMYB206-MsMYB450-MsHY5 complex regulates alfalfa tolerance to salt stress via regulating flavonoid biosynthesis during the day and night cycles.

Flavonoids are the major secondary metabolites participating in many biological processes of plants. Although flavonoid biosynthesis has been extensively studied, its regulatory mechanisms during the day and night cycles remain poorly understood. In this study, three proteins, MsMYB206, MsMYB450, and MsHY5, were found to interact with each other, in which MsMYB206 directly transactivated two flavonoid biosynthetic genes, MsFLS and MsF3'H.