Differential clinicopathological and molecular features within late-onset colorectal cancer according to tumor location
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ABSTRACT:
PROVIDER: PRJNA422799 | ENA |
REPOSITORIES: ENA
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Project description:Background: Since there is a predilection of some clinical and molecular features for a given tumor location, we assessed whether this can be confirmed in late-onset colorectal cancer (LOCRC). Methods: We analyzed clinical and molecular characteristics of LOCRC at different tumor locations in order to determine if there are differential phenotypes related with the location in the colon. Results: Right colon cancers showed features associated with sporadic Microsatellite Instability: predominance of female cases and BRAF mutations, and an important mucinous component. Left colon cancers developed a higher number of polyps and multiple primary CRCs, showed the strongest familial component, and had better prognosis. Rectal cancers showed a predominantly sporadic phenotype, with worse prognosis and a CpG Island Methylator Phenotype (CIMP)-High. No copy number alterations (CNAs) greater than or equal to 50% were observed in this LOCRC group, and the most recurrent alterations were losses at 5q13 and 14q11, and gains at 7q11, 7q21-q22, 19p13-p12, 19q13 and 20p11-q11. KRAS and PIK3CA were the only mutated genes showing differences according to the tumor location, mainly for right colon cancers. Conclusions: Categorizing LOCRC according to tumor location appears to be an adequate first step to resolving the heterogeneity of this subset of CRC.
2019-12-20 | GSE108166 | GEO
Project description: Not available
| S-EPMC5880605 | biostudies-literature
Project description:Gene expression was analyzed in terms of canonical molecular changes and clinicopathological features to elucidate alternative or subordinate pathways during colorectal tumorigenesis and tumor growth. Eighty-four sporadic colorectal cancer patients, standardized by tumor location, were consecutively enrolled. Representative molecular changes including APC, TP53, Wnt, RAF, and mismatch repair defect (MMR) were recorded for each sample. Keywords: disease state analysis; sub-type analysis within colorectal cancers
2009-03-01 | GSE10982 | GEO
Project description:Despite a decrease in the incidence of colorectal cancer (CRC) over the last 40 years, the incidence of CRC in people under 50 years old is increasing around the globe. Early onset (50 years old) and late onset (65 years old) CRC appear to have differences in their clinicopathological and genetic features, but it is unclear if there are differences in the tumor microenvironment. We hypothesized that the immune microenvironment of early onset CRC is distinct from late onset CRC and promotes tumor progression. We used Nanostring immune profiling to analyze mRNA expression of immune genes in FFPE surgical specimens from patients with early (N=40) and late onset (N=39) CRC. We found three genes, SAA1, C7, and CFD, have increased expression in early onset colorectal cancer and distinct immune signatures based on the tumor location. After adjusting for clinicopathological features, increased expression of CFD and SAA1 were associated with worse progression free survival and increased expression of C7 was associated with worse overall survival. We also performed gain of function experiments with CFD and SAA1 in subcutaneous tumor murine models and found that CFD is associated with higher tumor volumes, impacted several immune genes and impacted three genes in mice that were also found to be differentially expressed in early onset CRC (EGR1, PSMB9, CXCL9). Our data demonstrate that the immune microenvironment, characterized by a distinct innate immune response signature in early onset CRC, is unique, location dependent, and might contribute to worse outcomes.
2021-05-25 | GSE175433 | GEO
Project description:Sporadic early onset colorectal carcinoma (EOCRC) is a growing problem that remains poorly understood. Clinical specificities and mechanisms of tumorigenesis might be relevant to both diagnosis and treatment. In this prospective study, clinicopathological features, genomic and gene expression profiles of sporadic EOCRC were compared to other well defined groups of CRC. Seventy selected patients were divided into 4 groups according to age (< 45 or > 60 years) and mismatch repair status. Mutations of key genes involved in colorectal carcinogenesis (P53, KRAS, BRAF, PIK3CA) were detected and the methylator phenotype (CIMP) established. Gene expression profiles (GEP) were obtained using pangenomic Affymetrix GeneChip.
2014-08-04 | E-GEOD-39084 | biostudies-arrayexpress
Project description:Gene expression was analyzed in terms of canonical molecular changes and clinicopathological features to elucidate alternative or subordinate pathways during colorectal tumorigenesis and tumor growth. Eighty-four sporadic colorectal cancer patients, standardized by tumor location, were consecutively enrolled. Representative molecular changes including APC, TP53, Wnt, RAF, and mismatch repair defect (MMR) were recorded for each sample. Keywords: disease state analysis; sub-type analysis within colorectal cancers 84 samples from colorectal patients were analyzed. Paired tumor and adjacent normal tissues from the same patient were used for hybridization onto custom-made, 21k dual channel cDNA arrays. We prepared a similar number of samples from each of the three tumor locations (ascending 27, descending 29, and rectum 28) and recorded for each sample important molecular changes such as APC, TP53, RAF, WNT, and MMR mutations.
2009-02-28 | E-GEOD-10982 | biostudies-arrayexpress
Project description:Alterations in glycosylation are seen in many types of cancer, including colorectal cancer (CRC). CRC is known to display glycosylation alterations. Glycans, the sugar moieties of glycoconjugates, are involved in many important functions relevant to cancer, such as cell signaling and adhesion, and may can be of value as biomarkers. In this study, we have used mass spectrometry to analyze the N-glycan profiles of 35 CRC tissue samples from patients with tumors in the right or left colon and 10 healthy tissue samples from non-CRC patients who underwent operations for other reasons. The tumor samples were divided into groups depending on tumor location (right or left colon) and stage (II or III), while the healthy samples were divided into right or left side of the colon. The levels of neutral and acidic N-glycan compositions and glycan classes were analyzed in a total of ten different groups. Surprisingly, there were no significant differences in glycan levels when all right- and left-sided CRC samples were compared, and few differences (such as in the abundance of the neutral N-glycan H3N5) were seen when the samples were divided according to both location and stage. Multiple significant differences were found in the levels of glycans and glycan classes when stage II and III samples were compared, and these glycans could be of value as candidates for new markers of cancer progression. In order to validate our findings, we analyzed healthy tissue samples from the right and left colon and found no significant differences in the levels of any of the glycans analyzed, confirming that our findings when comparing CRC samples from the right and left colon are not due to normal variations in the levels of glycans between the healthy right and left colon. Additionally, the levels of the acidic glycans H4N3F1P1, H5N4F1P1, and S1H5N4F1 were found to change in a cancer-specific but colon location-nonspecific manner, indicating that CRC affects glycan levels in similar ways, regardless of tumor location.
2020-06-10 | PXD018673 | Pride
Project description:Sporadic early onset colorectal carcinoma (EOCRC) is a growing problem that remains poorly understood. Clinical specificities and mechanisms of tumorigenesis might be relevant to both diagnosis and treatment. In this prospective study, clinicopathological features, genomic and gene expression profiles of sporadic EOCRC were compared to other well defined groups of CRC.
2014-08-04 | GSE39084 | GEO
Project description:Primary outcome(s): Endoscopic and clinicopathological features of depressed-type early colorectal carcinomas
| 2625753 | ecrin-mdr-crc
Project description: Not available
| S-EPMC5382941 | biostudies-literature