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Dvorak P, Hanicinec V, Soucek P. The position of the longest intron is related to biological functions in some human genes. Front Genet 2023; 13:1085139. [PMID: 36712854 PMCID: PMC9875286 DOI: 10.3389/fgene.2022.1085139] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Accepted: 12/27/2022] [Indexed: 01/12/2023] Open
Abstract
The evidence that introns can influence different levels of transfer of genetic information between DNA and the final product is increasing. Longer first introns were found to be a general property of eukaryotic gene structure and shown to contain a higher fraction of conserved sequence and different functional elements. Our work brings more precise information about the position of the longest introns in human protein-coding genes and possible connection with biological function and gene expression. According to our results, the position of the longest intron can be localized to the first third of introns in 64%, the second third in 19%, and the third in 17%, with notable peaks at the middle and last introns of approximately 5% and 6%, respectively. The median lengths of the longest introns decrease with increasing distance from the start of the gene from approximately 15,000 to 5,000 bp. We have shown that the position of the longest intron is in some cases linked to the biological function of the given gene. For example, DNA repair genes have the longest intron more often in the second or third. In the distribution of gene expression according to the position of the longest intron, tissue-specific profiles can be traced with the highest expression usually at the absolute positions of intron 1 and 2. In this work, we present arguments supporting the hypothesis that the position of the longest intron in a gene is another biological factor modulating the transmission of genetic information. The position of the longest intron is related to biological functions in some human genes.
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Affiliation(s)
- Pavel Dvorak
- Department of Biology, Faculty of Medicine in Pilsen, Charles University, Pilsen, Czechia,Biomedical Center, Faculty of Medicine in Pilsen, Charles University, Pilsen, Czechia,Institute of Medical Genetics, University Hospital Pilsen, Pilsen, Czechia,*Correspondence: Pavel Dvorak,
| | - Vojtech Hanicinec
- Biomedical Center, Faculty of Medicine in Pilsen, Charles University, Pilsen, Czechia
| | - Pavel Soucek
- Biomedical Center, Faculty of Medicine in Pilsen, Charles University, Pilsen, Czechia,Toxicogenomics Unit, National Institute of Public Health, Prague, Czechia
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Ambrozkiewicz F, Trailin A, Červenková L, Vaclavikova R, Hanicinec V, Allah MAO, Palek R, Třeška V, Daum O, Tonar Z, Liška V, Hemminki K. CTNNB1 mutations, TERT polymorphism and CD8+ cell densities in resected hepatocellular carcinoma are associated with longer time to recurrence. BMC Cancer 2022; 22:884. [PMID: 35962322 PMCID: PMC9375422 DOI: 10.1186/s12885-022-09989-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Accepted: 08/08/2022] [Indexed: 12/27/2022] Open
Abstract
Background Hepatocellular carcinoma (HCC) is a fatal disease characterized by early genetic alterations in telomerase reverse transcriptase promoter (TERTp) and β-catenin (CTNNB1) genes and immune cell activation in the tumor microenvironment. As a novel approach, we wanted to assess patient survival influenced by combined presence of mutations and densities of CD8+ cytotoxic T cells. Methods Tissue samples were obtained from 67 HCC patients who had undergone resection. We analysed CD8+ T cells density, TERTp mutations, rs2853669 polymorphism, and CTNNB1 mutations. These variables were evaluated for time to recurrence (TTR) and disease free survival (DFS). Results TERTp mutations were found in 75.8% and CTNNB1 mutations in 35.6% of the patients. TERTp mutations were not associated with survival but polymorphism rs2853669 in TERTp was associated with improved TTR and DFS. CTNNB1 mutations were associated with improving TTR. High density of CD8+ T-lymphocytes in tumor center and invasive margin correlated with longer TTR and DFS. Combined genetic and immune factors further improved survival showing higher predictive values. E.g., combining CTNNB1 mutations and high density of CD8+ T-lymphocytes in tumor center yielded HRs of 0.12 (0.03–0.52), p = 0.005 for TTR and 0.25 (0.09–0.74), p = 0.01 for DFS. Conclusion The results outline a novel integrative approach for prognostication through combining independent predictive factors from genetic and immune cell profiles. However, larger studies are needed to explore multiple cell types in the tumor microenvironment. Supplementary Information The online version contains supplementary material available at 10.1186/s12885-022-09989-0.
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Affiliation(s)
- Filip Ambrozkiewicz
- Laboratory of Translational Cancer Genomics, Biomedical Center,Faculty of Medicine in Pilsen, Charles University, Alej Svobody 1665/76, 323 00, Pilsen, Czech Republic.
| | - Andriy Trailin
- Laboratory of Translational Cancer Genomics, Biomedical Center,Faculty of Medicine in Pilsen, Charles University, Alej Svobody 1665/76, 323 00, Pilsen, Czech Republic
| | - Lenka Červenková
- Laboratory of Cancer Treatment and Tissue Regeneration, Biomedical Center, Faculty of Medicine in Pilsen, Charles University, Prague, Czech Republic.,Department of Pathology, Third Faculty of Medicine, Charles University, Ruská 87, 100 00, Prague, 10, Czech Republic
| | - Radka Vaclavikova
- Laboratory of Pharmacogenomics, Biomedical Center, Faculty of Medicine in Pilsen, Charles University, Pilsen, Czech Republic.,Toxicogenomics Unit, National Institute of Public Health in Prague, Prague, Czech Republic
| | - Vojtech Hanicinec
- Laboratory of Pharmacogenomics, Biomedical Center, Faculty of Medicine in Pilsen, Charles University, Pilsen, Czech Republic
| | - Mohammad Al Obeed Allah
- Laboratory of Pharmacogenomics, Biomedical Center, Faculty of Medicine in Pilsen, Charles University, Pilsen, Czech Republic
| | - Richard Palek
- Laboratory of Cancer Treatment and Tissue Regeneration, Biomedical Center, Faculty of Medicine in Pilsen, Charles University, Prague, Czech Republic.,Department of Surgery, Faculty of Medicine in Pilsen, Charles University, Alej 16 Svobody 80, 323 00, Pilsen, Czech Republic
| | - Vladislav Třeška
- Department of Surgery, Faculty of Medicine in Pilsen, Charles University, Alej 16 Svobody 80, 323 00, Pilsen, Czech Republic
| | - Ondrej Daum
- Sikl's Institute of Pathology, Faculty of Medicine and Teaching Hospital in Plzen, Charles University, Plzen, Czech Republic.,Bioptická laboratoř s.r.o., Mikulášské nám, 4, 326 00, Pilsen, Czech Republic
| | - Zbyněk Tonar
- Department of Histology and Embryology, Faculty of Medicine in Pilsen, Charles University, Karlovarska 48, 301 66, Pilsen, Czech Republic.,Laboratory of Quantitative Histology, Biomedical Center, Faculty of Medicine in Pilsen, Charles University, Alej Svobody 1665/76, 323 00, Pilsen, Czech Republic
| | - Václav Liška
- Laboratory of Cancer Treatment and Tissue Regeneration, Biomedical Center, Faculty of Medicine in Pilsen, Charles University, Prague, Czech Republic.,Department of Surgery, Faculty of Medicine in Pilsen, Charles University, Alej 16 Svobody 80, 323 00, Pilsen, Czech Republic
| | - Kari Hemminki
- Laboratory of Translational Cancer Genomics, Biomedical Center,Faculty of Medicine in Pilsen, Charles University, Alej Svobody 1665/76, 323 00, Pilsen, Czech Republic.,Department of Cancer Epidemiology, German Cancer Research Center, Im Neuenheimer Feld 280, 69120, Heidelberg, Germany
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Hanicinec V, Brynychova V, Rosendorf J, Palek R, Liska V, Oliverius M, Kala Z, Mohelnikova-Duchonova B, Krus I, Soucek P. Gene expression of cytokinesis regulators PRC1, KIF14 and CIT has no prognostic role in colorectal and pancreatic cancer. Oncol Lett 2021; 22:598. [PMID: 34188700 PMCID: PMC8228381 DOI: 10.3892/ol.2021.12859] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Accepted: 05/12/2021] [Indexed: 02/06/2023] Open
Abstract
Colorectal cancer is one of the most common cancers and pancreatic cancer is among the most fatal and difficult to treat. New prognostic biomarkers are urgently needed to improve the treatment of colorectal and pancreatic cancer. Protein regulating cytokinesis 1 (PRC1), kinesin family member 14 (KIF14) and citron Rho-interacting serine/threonine kinase (CIT) serve important roles in cytokinesis, are strongly associated with cancer progression and have prognostic potential. The present study aimed to investigate the prognostic relevance of the PRC1, KIF14 and CIT genes in colorectal and pancreatic cancer. PRC1, KIF14 and CIT transcript expression was assessed by reverse transcription-quantitative PCR in tumors and paired distant unaffected mucosa from 67 patients with colorectal cancer and tumors and paired non-neoplastic control tissues from 48 patients with pancreatic cancer. The extent of transcript dysregulation between tumor and control tissues and between groups of patients divided by main clinical characteristics, namely patients' age and sex, disease stage, localization and grade, was determined. Finally, the associations of transcript levels in tumors with disease-free interval and overall survival time were evaluated. PRC1, KIF14 and CIT transcripts were upregulated in tumors compared with control tissues. PRC1, KIF14 and CIT levels strongly correlated to each other in both colorectal and pancreatic tumor and control tissues after correction for multiple testing. However, no significant associations were found among the transcript levels of PRC1, KIF14 and CIT and disease-free interval or overall survival time. In summary, the present study demonstrated mutual correlation of PRC1, KIF14 and CIT cytokinesis regulators with no clear prognostic value in pancreatic and colorectal cancers. Hence, according to the results of the present study, transcript levels of these genes cannot be clinically exploited as prognostic biomarkers in colorectal or pancreatic cancer patients.
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Affiliation(s)
- Vojtech Hanicinec
- Biomedical Centre, Faculty of Medicine in Pilsen, Charles University, 32300 Pilsen, Czech Republic
| | - Veronika Brynychova
- Biomedical Centre, Faculty of Medicine in Pilsen, Charles University, 32300 Pilsen, Czech Republic
| | - Jachym Rosendorf
- Biomedical Centre, Faculty of Medicine in Pilsen, Charles University, 32300 Pilsen, Czech Republic.,Deparment of Surgery, Teaching Hospital and Faculty of Medicine in Pilsen, Charles University, 30460 Pilsen, Czech Republic
| | - Richard Palek
- Biomedical Centre, Faculty of Medicine in Pilsen, Charles University, 32300 Pilsen, Czech Republic.,Deparment of Surgery, Teaching Hospital and Faculty of Medicine in Pilsen, Charles University, 30460 Pilsen, Czech Republic
| | - Vaclav Liska
- Biomedical Centre, Faculty of Medicine in Pilsen, Charles University, 32300 Pilsen, Czech Republic.,Deparment of Surgery, Teaching Hospital and Faculty of Medicine in Pilsen, Charles University, 30460 Pilsen, Czech Republic
| | - Martin Oliverius
- Department of Surgery, Faculty Hospital Kralovske Vinohrady and Third Faculty of Medicine, Charles University, 10000 Prague, Czech Republic
| | - Zdenek Kala
- Department of Surgery, University Hospital Brno and Faculty of Medicine, Masaryk University, 62500 Brno, Czech Republic
| | - Beatrice Mohelnikova-Duchonova
- Department of Oncology and Institute of Molecular and Translational Medicine, Faculty of Medicine and Dentistry, Palacky University, 77900 Olomouc, Czech Republic
| | - Ivona Krus
- Department of Toxicogenomics, National Institute of Public Health, Prague 10042, Czech Republic
| | - Pavel Soucek
- Biomedical Centre, Faculty of Medicine in Pilsen, Charles University, 32300 Pilsen, Czech Republic.,Department of Toxicogenomics, National Institute of Public Health, Prague 10042, Czech Republic
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