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A significant association exists between the gut microbiome and colorectal carcinogenesis, as well as cancer progression. It has been reported that Escherichia coli (E. coli) containing polyketide synthetase (pks) island contribute to colorectal carcinogenesis by producing colibactin, a polyketide-peptide genotoxin. However, the functions of pks E. coli in initiation, proliferation, and metastasis of colorectal cancer (CRC) remain unclear. We investigated the clinical significance of pks E. coli to clarify its functions in CRC. This study included 413 patients with CRC. Pks E. coli of tumor tissue and normal mucosal tissue were quantified using droplet digital PCR. Pks E. coli was more abundant in Stages 0-I tumor tissue than in normal mucosal tissue or in Stages II-IV tumor tissue. High abundance of pks E. coli in tumor tissue was significantly associated with shallower tumor depth (hazard ratio [HR] = 5.0, 95% confidence interval [CI] = 2.3-11.3, p < 0.001) and absence of lymph node metastasis (HR = 3.0, 95% CI = 1.8-5.1, p < 0.001) in multivariable logistic analyses. Pks E. coli-low and -negative groups were significantly associated with shorter CRC-specific survival (HR = 6.4, 95% CI = 1.7-25.6, p = 0.005) and shorter relapse-free survival (HR = 3.1, 95% CI = 1.3-7.3, p = 0.01) compared to the pks E. coli-high group. Pks E. coli was abundant in Stages 0-I CRC and associated with CRC prognosis. These results suggest that pks E. coli might contribute to carcinogenesis of CRC but might not be associated with tumor progression.
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http://dx.doi.org/10.1111/cas.16088 | DOI Listing |
Eur J Med Res
December 2024
Henan Provincial People's Hospital, Zhengzhou University People's Hospital, Henan University People's Hospital, No. 7 Weiwu, Zhengzhou, 450003, Henan, China.
Background: Nicastrin, a subunit of the γ-secretase complex, is encoded by the NCSTN gene and regulates notch signaling, it is involved in the pathogenesis of hidradenitis suppurativa (HS), Alzheimer disease (AD), and liver cancer. However, the animal models for studying HS are relatively scarce.
Methods: CRISPR/Cas-mediated genetic engineering was used to generate targeted knockout offspring mice (C57BL/6J).
Cancer Cell Int
December 2024
Institute for Excellence in Clinical Medicine of Kunshan First People's Hospital, Soochow University, Suzhou, China.
Gliomas are the most common tumors of the central nervous system, with glioblastoma (GBM) being particularly aggressive and fatal. Current treatments for GBM, including surgery and chemotherapy, are limited by tumor aggressiveness and the blood-brain barrier. Therefore, understanding the molecular mechanisms driving GBM growth is essential.
View Article and Find Full Text PDFCell Div
December 2024
Department of Nuclear Medicine, Third Affiliated Hospital of Sun Yat-sen University, Guang Zhou, 510630, Guangdong, China.
Background: Abnormal expression of six-transmembrane epithelial antigen of prostate 4 (STEAP4) has been implicated in the carcinogenesis of hepatocellular carcinoma (HCC). However, the biological role and regulatory mechanisms of STEAP4 in HCC remain unclear.
Methods And Results: Here, we analyzed STEAP4 expression levels and differentially expressed genes (DEGs) between STEAP4 high- and low-expression groups using multiple databases.
Biol Direct
December 2024
Department of Gastrointestinal Surgery, Affiliated Hospital of Jiangnan University, 1000 Hefeng Road, Wuxi, 214062, Jiangsu Province, China.
Background: Accumulating studies have focused on long noncoding RNAs (lncRNAs) because of their regulatory effects on multiple cancers. However, the biological functions and molecular mechanisms of lncRNAs in gastric cancer (GC) remain to be elucidated in depth.
Methods: Long intergenic nonprotein coding RNA 1094 (LINC01094), a differentially expressed lncRNA between GC tissues and adjacent normal tissues, was identified.
Mol Med
December 2024
Department of Neurobiology and Anatomy, Key Laboratory of Neurobiology, Xuzhou Medical University, 209, Tongshan Road, Xuzhou, 221004, China.
Doublecortin (DCX) is a microtubule-associated protein known to be a key regulator of neuronal migration and differentiation during brain development. However, the role of DCX, particularly in regulating the survival and growth of glioma cells, remains unclear. In this study, we utilized CRISPR/Cas9 technology to knock down DCX in the human glioma cell line (U251).
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