遗传最新文献

Genetic transformation technology is a core tool for generating plants with gain- or loss-of-function in modern biology and agricultural biotechnology. In recent years, developmental regulatory factors (DRs) have shown great potential in enhancing the efficiency of crop genetic transformation. In this review, we systematically examine the main crop genetic transformation methods, including Agrobacterium-mediated transformation and gene gun techniques, and discuss the current challenges in the transformation process, such as low transformation efficiency, strong genotype dependence, and insufficient regeneration capacity. We then provide a detailed discussion of several key developmental regulatory factors and their recent applications in improving transformation efficiency, overcoming genotype dependence, and enhancing regeneration capacity. Additionally, we explore the future prospects of DRs, highlighting their significant potential applications in precision gene editing, functional genomics, synthetic biology, and crop genetic improvement. Through in-depth research on DRs, the bottlenecks in crop genetic transformation are expected to be effectively overcome, thus advancing the further development of crop science and agricultural biotechnology.

Inflammatory responses have been identified as a critical factor in the development and progression of various types of tumors. These responses influence the tumor microenvironment, promoting tumor cell invasion and migration while concomitantly reducing the efficacy of tumor therapy. Inflammation is widely regarded as a significant risk factor for the development of endometrial cancer (EC). However, the precise mechanisms through which it influences the development of EC remain to be elucidated. In this study, we obtain RNA expression profiles of EC patients and related clinical information from The Cancer Genome Atlas (TCGA) database. We then screen key inflammation-related genes using survival analysis and the least absolute value shrinkage and selection operator (LASSO) algorithms. Based on this, we finally construct a prognostic risk scoring model containing nine non-zero coefficient IRGs and an alignment diagram prediction model. Survival analysis demonstrates that patients in the low-risk group exhibit a higher survival rate and more favorable prognosis. The predictive performance of both models was confirmed through the analysis of test sets and calibration curves. Subsequently, we obtain EC-related datasets from the Gene Expression Omnibus (GEO) database to serve as an external validation, thereby further substantiating the reliability of the models. Subsequent immune infiltration analysis revealed significant disparities among nine immune cell types between the high- and low-risk groups, with multiple immune cells correlating with tumor progression and prognosis. Concurrently, we perform drug sensitivity analysis, it reveals a significant correlation between one representative EC drug, tamoxifen, and one of the aforementioned IRGs. In summary, our study successfully constructs a risk score model and a column-line graph prediction model for EC. It is expected that these models will better predict the overall survival and provide new therapeutic targets for EC patients.

Hynobius yiwuensis is a vulnerable species endemic to China, restricted to specific hilly regions in Zhejiang Province. This study employed stereomicroscopy to examine the limb regeneration process in H. yiwuensis and utilized transcriptome sequencing to analyze differentially expressed genes. The results indicate that H. yiwuensis possesses strong regenerative capabilities, with the regeneration process comprising four stages: wound healing, tissue dissolution and dedifferentiation, blastema formation, and morphogenesis followed by redifferentiation. Transcriptome analysis identified numerous differentially expressed genes during limb regeneration, exhibiting distinct expression patterns at various time points post-amputation. Key differentially expressed genes were identified, including IL10, associated with cellular immunity and inflammation; TGFβ3, involved in early muscle tissue regeneration; and MMPs, implicated in tissue remodeling. qRT-PCR validation of selected differentially expressed genes confirmed the reliability of the transcriptome sequencing data. Preliminary findings suggest that H. yiwuensis regulates limb regeneration and promotes scar-free tissue repair through signaling pathways such as Wnt/β-catenin, TGFβ, and BMP.

Recurrent miscarriage is defined as three or more consecutive spontaneous abortions. Its etiology is complex, involving genetic, immune, and endocrine factors. In recent years, lipid metabolism disorders have attracted increasing attention for their potential role in recurrent miscarriage. Abnormalities in lipid metabolism can adversely affect endometrial receptivity, contributing to implantation failure. However, the precise underlying mechanisms remain to be fully elucidated. In this review, we provide an overview of the pathological mechanisms and recent advancements in research pertaining to the relationship between lipid metabolic disorders, embryonic development, and the establishment of endometrial receptivity. Special emphasis is placed on the influence of cholesterol and fatty acid metabolism on recurrent miscarriage. Furthermore, we examine the contributions of lipid metabolism to hormone synthesis and regulation, as well as the pathological changes that can arise from lipid-mediated local inflammation within the endometrium. Finally, we discuss the potential roles of lipid profile monitoring, dietary interventions, and lipid metabolism-targeted therapies in the early diagnosis and treatment of recurrent miscarriage. We hope this review can enhance understanding of the mechanisms underlying lipid metabolic dysfunction in this context and inform the development of tailored therapeutic strategies.

The gonad differentiation and gametogenesis of fish is regulated by various factors. Protein phosphatase (PP) have the function of catalyzing the dephosphorylation of proteins in organisms. As a member of the protein phosphatase family, protein phosphatase type 6 (PP6) plays an important role in gonadal development and gametogenesis. The role of ppp6r3, which encodes the regulatory subunit 3 of protein phosphatase 6, in gonadal differentiation and gametogenesis is still unclear. In this study, two zebrafish ppp6r3 mutant lines were constructed using CRISPR/Cas9 technology. It was found that the absence of ppp6r3 leads to the development of only male zebrafish, and these mutants are incapable of fertilizing wild-type eggs. Further investigations revealed that in the testes of ppp6r3 mutants, the transition of spermatocytes to mature sperm was blocked, disrupting spermatogenesis. In summary, this study established a ppp6r3 mutant model, exhibiting defects in gonadal differentiation and gametogenesis, which provides a new model for further research on the mechanisms by which Ppp6r3 regulates germ cell proliferation, differentiation, and sex determination.

The long-term co-evolution between bacteria and their viruses (bacteriophages) drives the diversification of anti-phage defense systems. As key members of marine ecosystems, Vibrio species are known for their large and complex genomes. To investigate the composition and distribution of anti-phage defense systems in Vibrio genomes, we collect 242 representative genomes from the GTDB and NCBI databases. Using bioinformatics tools (including Defense Finder), we analyze the anti-phage defense systems encoded by these genomes and identify a total of 108 distinct systems, including GAPS, dGTPase, RM systems, etc. We observe significant variation in defense capabilities among different Vibrio strains: five strains encode more than 20 defense systems, highlighting their high defense potential, while over 30 strains encode five or fewer defense systems. Notably, we find no known defense systems in 'Vibrio katoptron'. Furthermore, we note that the diversity of defense systems varies among Vibrio clades, with the Cholerae clade exhibiting the highest entropy in its defense systems. We conduct a detailed analysis of the composition, structure, and functional mechanisms of these defense systems. Although Vibrio species exhibit a complex and diverse array of anti-phage defense systems, the specific functions of many remain unknown. Given the complexity of Vibrio genomes, we suggest that numerous potential defense systems are yet to be discovered. This study provides a comprehensive overview of the genomic characteristics of Vibrio defense systems, laying a foundation for future research into the interactions and evolutionary dynamics between Vibrio and bacteriophages.

Highly precise regulation of protein synthesis is critical for the homeostasis and functionality of living organisms. Alanyl-tRNA synthase (AARS1/2) plays a crucial role in this process. AARS1/2 are a class of enzymes that synthesize alanyl-tRNA in cells, participating in protein synthesis encoded by genes, and catalyzing the propionylation of lysine residues in proteins, thereby regulating protein function. This article reviews the research progress on the involvement of AARS1/2 in disease progression induced by protein mistranslation and in the regulation of the metabolic-immune interaction network, aiming to better understand the pathophysiological mechanisms of AARS1/2 and to provide a reference for the development of potential therapeutic drugs.

Small non-coding RNAs (sncRNAs) are crucial in epigenetics, playing a significant regulatory role in the normal development and intergenerational inheritance of male reproduction. Research has shown that highly expressed sncRNAs, including miRNAs, piRNAs, and tsRNAs, are vital in maintaining male germ cell development and spermatogenesis. sncRNAs regulate gene expression, influence protein translation, and modify sperm epigenetics, contributing to male reproductive development at various stages. Abnormal expression of sncRNAs is closely linked to male infertility. Furthermore, growing evidence suggests that environmental exposures affect sperm epigenetic modifications, often leading to phenotypic changes in future generations. In this review, we summarize the types and functions of sncRNAs in male germ cells and examine their role in intergenerational inheritance due to environmental factors. It aims to provide new insights into male reproductive health and potential targets for preventing and treating male infertility and related diseases.

Ribonucleic acids (RNAs) are key biomolecules responsible for the transmission of genetic information, the synthesis of proteins and its regulation, and modulation of many biochemical processes. They are also the key components of many viruses. Chemically modified synthetic RNAs or oligoribonucleotides are becoming more widely used as therapeutics and vaccines. Demands for technologies to detect, sequence, identify, and quantify RNA and its modifications far exceed requirements found in the DNA realm. Currently, mass spectrometry (MS) has become the primary technology for identifying, sequencing, and quantifying RNA and its modifications. This paper mainly reviews latest advances in mass spectrometry for the research of RNA and its modifications, and discusses the strengths and weaknesses of this technology, aiming to provide readers with a comprehensive perspective from technical fundamentals to application prospects, promote the broader application of mass spectrometry in RNA research, and provide important references for method developers and biological researchers in the field.

MicroRNAs (miRNAs) are a class of endogenous small non-coding RNAs with 20 to 24 nucleotides in length. They primarily regulate gene expression at the post-transcriptional level and influence numerous biological processes, including reproduction, development, and responses to environmental stimuli in both plants and animals. The spatiotemporal expression of miRNAs across organs, tissues, and cells is tightly regulated at multiple levels, encompassing transcription, processing, stability control, and targeted degradation. The biochemical pathway of miRNA biogenesis, including transcription and processing, has been established, and its regulatory mechanisms have also been extensively studied. In this review, we systematically summarize current advances in post-biogenesis regulation of miRNA stability, turnover, and targeted degradation in plants, with comparative analyses of similarities and differences in animal systems. By integrating these advances, this review seeks to provide a framework for further elucidating the molecular mechanisms controlling intracellular miRNA abundance.