Biomedical subjects

Jingyi Zhang

Publications and source records attributed to Jingyi Zhang.

3 recordsLinked to original sources

PubMed2026

The impact of supernormal lung function on mortality risk in adults with and without sleep-disordered breathing.

BACKGROUND: In the general population, supernormal lung function is associated with a lower risk of all-cause mortality. RESEARCH QUESTION: It remains unclear whether sleep-disordered breathing (SDB) affects this relationship. METHODS: This cohort analysis included 4,839 adults. Lung function was categorised as supernormal (FEV1 > ULN), normal (LLN ≤ FEV1 ≤ ULN), and below normal (FEV1 < LLN). SDB severity was classified using apnoea-hypopnoea index categories: no SDB (<5 events/hour), mild SDB (5-<15 events/hour), moderate SDB (15-<30 events/hour), and severe SDB (≥30 events/hour). The association between lung function and all-cause mortality was assessed using Cox proportional hazards models with subgroup analyses according to SDB severity and formal testing for interaction. Analyses were repeated using FVC-defined lung function groups as an alternative definition of supernormal lung function. RESULTS: Among the included participants, 4,068 (84.1%) had normal lung function, 369 (7.6%) had supernormal lung function, and 402 (8.3%) had below normal lung function. During 52 421.5 person-years of follow-up (median 11.72 years; IQR, 10.46-12.56), 1,188 deaths occurred. Compared with the normal lung function group, the supernormal lung function group had a lower prevalence of baseline hypertension and cardiovascular disease. The association between lung function and all-cause mortality varied across SDB severity strata (P for interaction = 0.034). A lower mortality risk associated with supernormal lung function was observed in participants without SDB (HR: 0.24, 95% CI: 0.06-0.97), whereas this association was not statistically significant in the mild, moderate, or severe SDB strata. Below normal lung function was generally associated with an increased all-cause mortality risk. Sensitivity analyses using FVC-defined lung function groups yielded broadly consistent findings. CONCLUSION: Supernormal lung function was associated with lower all-cause mortality primarily among individuals without SDB. These findings underscore the importance of considering SDB severity when assessing the health implications of lung function.

Humans↗

PubMed2026

Genomic characterization of blaIMP-harboring plasmids in Klebsiella spp.

UNLABELLED: The spread of carbapenem-resistant Klebsiella spp. poses a significant public health threat, partly due to the acquisition of the blaIMP genes, which encode IMP-type metallo-β-lactamases. These enzymes confer resistance to a broad spectrum of β-lactam antibiotics, including carbapenems, thereby complicating treatment options. This study aims to provide a comprehensive genomic characterization of blaIMP-harboring plasmids across different species within the genus Klebsiella, based on the genomic characteristics of the plasmid pT117-2 of Klebsiella variicola strain T117 isolated from clinical settings in China, along with all available blaIMP-harboring plasmids of Klebsiella spp. fromthe GenBank database until 26 April 2025. Among the 123 blaIMP-harboring plasmids of Klebsiella spp., nine variants were identified, with blaIMP-4 (carried by 69 plasmids) and blaIMP-1 (carried by 37 plasmids) being the most prevalent. The blaIMP-4 gene was associated with IncN type (~50 kb, conjugative) and untypeable (~300 kb, non-mobilizable) plasmids in China, whereas in Australia, it was linked to IncC (~200 kb) and IncM2 (~80 kb) type conjugative plasmids. Meanwhile, blaIMP-1 was found to be associated with IncN (~50 kb), IncM (~80 kb), and IncFII (80 ~200 kb) type conjugative plasmids mainly in Japan. Notably, our results highlight the prevalence of IncN-type conjugative plasmids, including the plasmid pT117-2 identified in this study, as key vehicles for the dissemination of blaIMP genes. This study provides critical insights into the genetic mechanisms of blaIMP-harboring plasmids persistence and spread in Klebsiella spp., advancing our understanding of their dissemination. IMPORTANCE: Carbapenem-resistant Enterobacterales (CRE) mediated by metallo-β-lactamases (MBLs) pose a major global public health threat that challenges clinical antimicrobial therapy; based on our study, blaIMP-4 in China is predominantly associated with IncN plasmids (forming the "IncN-blaIMP-4-qnrS1" axis), while blaIMP-1 in Japan links to IncN/IncM/IncFII plasmids, with these regional differences highlighting the need for geographically targeted surveillance, and notably, the high-risk ST146 Klebsiella variicola carrying blaIMP-4 on a conjugative IncN plasmid serves as an underrecognized reservoir for resistance genes, extending surveillance beyond common pathogenic Enterobacterales; limitations of this study include restricted sample size and geographic scope, and future research should validate these patterns via multi-center studies, explore plasmid evolution mechanisms, and integrate findings into routine surveillance to optimize antibiotic stewardship and infection control, thereby mitigating the global spread of MBL-mediated CRE.

Plasmids↗

PubMed2026

High-Resolution Chromosome-Level Genome Assembly and Annotation of Triplophysa stewarti, an Endemic Plateau Loach from the Qinghai-Tibet Plateau.

The bottom-dwelling fish Triplophysa stewarti, endemic to the Qinghai-Tibet Plateau, is a valuable model for studying high-altitude adaptation in aquatic ecosystems. However, the lack of a high-quality reference genome has hindered comparative genomic and evolutionary studies within this genus. Here, we present a chromosome-level genome assembly for T. stewarti, generated using PacBio HiFi long-read sequencing and Hi-C scaffolding. The 697.9 Mb assembly is highly continuous (scaffold N50 of 253.58 Mb) and encompasses 25 chromosomes, representing 92.65% of the genome. BUSCO analysis indicated a 98.4% completeness, supporting the high quality of the assembly. We annotated 28,009 protein-coding genes, with 97.04% being functionally assigned across multiple databases (NR, UniProt, KEGG, GO, Pfam and InterPro). Additionally, repetitive elements constituted 42.47% of the genome, and we identified 52,709 non-coding RNAs. This high-quality reference genome provides a fundamental resource for exploring the adaptive evolution, population structure, and conservation genetics of T. stewarti and related species on the Qinghai-Tibet Plateau.

Animals↗