scholarly journals Gut Microbiota Profiles in Early- and Late-Onset Colorectal Cancer: A Potential Diagnostic Biomarker in the Future

Digestion ◽  
2021 ◽  
pp. 1-10
Author(s):  
Murdani Abdullah ◽  
Ninik Sukartini ◽  
Saskia Aziza Nursyirwan ◽  
Rabbinu Rangga Pribadi ◽  
Hasan Maulahela ◽  
...  
Keyword(s):  
Colorectal Cancer ◽  
Risk Factors ◽  
Gut Microbiota ◽  
Late Onset ◽  
Diagnostic Biomarker ◽  
Incidence And Mortality ◽  
The Future ◽  
Early Onset Colorectal Cancer ◽  
Gut Microbiota Dysbiosis

<b><i>Background:</i></b> Researchers believe the role of gut microbiota dysbiosis in the raised incidence of early-onset colorectal cancer (EOCRC). The development of EOCRC may be associated with microbiota dysbiosis either dependently or independently (combined with other risk factors). <b><i>Summary:</i></b> Recently, the rising of incidence and mortality of EOCRC have been noted. Some researchers are looking for risk factors influencing this fact. They hypothesize that it may be because of microbiota dysbiosis. Microbiota dysbiosis has been known to promote cancer development through immunity dysregulation and chronic inflammation. Microbiomes profile in late-onset colorectal cancer (LOCRC) among older patients has been documented, but there is still lack of data about microbial profiles among younger colorectal cancer (CRC) patients. This review tries to explain microbial profiles differences between EOCRC and LOCRC as a potential diagnostic biomarker in the future, and whether microbiota can have a role in EOCRC genesis. <b><i>Key Messages:</i></b> Microbiota does vary with age, and EOCRC may be associated with colonization of some specific bacteria. Further studies about gut microbiota profiles in EOCRC and LOCRC may provide a new insight on diagnostic biomarker of CRC.

Risk factors and clinical characteristics of early-onset colorectal cancer vs. late-onset colorectal cancer

2020 ◽  
Vol Publish Ahead of Print ◽  
Author(s):  
Milena Di Leo ◽  
Raffaella A. Zuppardo ◽  
Marta Puzzono ◽  
Ilaria Ditonno ◽  
Alessandro Mannucci ◽  
...  
Keyword(s):  
Colorectal Cancer ◽  
Risk Factors ◽  
Early Onset ◽  
Clinical Characteristics ◽  
Late Onset ◽  
Early Onset Colorectal Cancer

scholarly journals The Role of Diet and Lifestyle in Early-Onset Colorectal Cancer: A Systematic Review

Cancers ◽  
2021 ◽  
Vol 13 (23) ◽  
pp. 5933
Author(s):  
Marta Puzzono ◽  
Alessandro Mannucci ◽  
Simone Grannò ◽  
Raffaella Alessia Zuppardo ◽  
Andrea Galli ◽  
...  
Keyword(s):  
Colorectal Cancer ◽  
Risk Factors ◽  
Systematic Review ◽  
Young Adults ◽  
Early Onset ◽  
Current Evidence ◽  
Exogenous Factors ◽  
Diet And Lifestyle ◽  
Early Onset Colorectal Cancer

The incidence of early-onset colorectal cancer, defined as colorectal cancer occurring in young adults under the age of 50, is increasing globally. Knowledge of the etiological factors in young adults is far from complete. Questionable eoCRCs’ exogenous factors are represented by processed meat, sugary drinks, alcohol, Western dietary pattern, overweight and obesity, physical inactivity, and smoking, though with heterogeneous results. Therefore, we performed a systematic review to summarize the current evidence on the role of diet and lifestyle as eoCRC risk factors. We systematically searched PubMed, Scopus, and EMBASE up to July 2021, for original studies evaluating diet, alcohol, physical activity, BMI, and smoking in eoCRC and included twenty-six studies. Indeed, the exogenous factors could represent modifiable key factors, whose recognition could establish areas of future interventions through public health strategies for eoCRC primary prevention. Additionally, we discussed the role of additional non-modifiable risk factors, and of epigenetic regulation and microbiota as mediators of the eoCRC triggered by diet and lifestyle.

scholarly journals Gut Dysbiosis and Intestinal Barrier Dysfunction: Potential Explanation for Early-Onset Colorectal Cancer

2021 ◽  
Vol 11 ◽  
Author(s):  
Siti Maryam Ahmad Kendong ◽  
Raja Affendi Raja Ali ◽  
Khairul Najmi Muhammad Nawawi ◽  
Hajar Fauzan Ahmad ◽  
Norfilza Mohd Mokhtar
Keyword(s):  
Colorectal Cancer ◽  
Environmental Factors ◽  
Gut Microbiota ◽  
Early Onset ◽  
Early Stage ◽  
Intestinal Barrier ◽  
Intestinal Barrier Function ◽  
Gut Dysbiosis ◽  
Early Onset Colorectal Cancer

Colorectal cancer (CRC) is a heterogeneous disease that commonly affects individuals aged more than 50 years old globally. Regular colorectal screening, which is recommended for individuals aged 50 and above, has decreased the number of cancer death toll over the years. However, CRC incidence has increased among younger population (below 50 years old). Environmental factors, such as smoking, dietary factor, urbanization, sedentary lifestyle, and obesity, may contribute to the rising trend of early-onset colorectal cancer (EOCRC) because of the lack of genetic susceptibility. Research has focused on the role of gut microbiota and its interaction with epithelial barrier genes in sporadic CRC. Population with increased consumption of grain and vegetables showed high abundance of Prevotella, which reduces the risk of CRC. Microbes, such as Fusobacterium nucleatum, Bacteroides fragilis and Escherichia coli deteriorate in the intestinal barrier, which leads to the infiltration of inflammatory mediators and chemokines. Gut dysbiosis may also occur following inflammation as clearly observed in animal model. Both gut dysbiosis pre- or post-inflammatory process may cause major alteration in the morphology and functional properties of the gut tissue and explain the pathological outcome of EOCRC. The precise mechanism of disease progression from an early stage until cancer establishment is not fully understood. We hypothesized that gut dysbiosis, which may be influenced by environmental factors, may induce changes in the genome, metabolome, and immunome that could destruct the intestinal barrier function. Also, the possible underlying inflammation may give impact microbial community leading to disruption of physical and functional role of intestinal barrier. This review explains the potential role of the interaction among host factors, gut microenvironment, and gut microbiota, which may provide an answer to EOCRC.

Mo1607 Role of Environmental Risk Factors on Early-Onset Colorectal Cancer Risk

2012 ◽  
Vol 142 (5) ◽  
pp. S-640
Author(s):  
Aung Ko Win ◽  
Sergio A. Taunde ◽  
Joanne P. Young ◽  
Daniel D. Buchanan ◽  
Driss Ait Ouakrim ◽  
...  
Keyword(s):  
Colorectal Cancer ◽  
Risk Factors ◽  
Cancer Risk ◽  
Environmental Risk ◽  
Early Onset ◽  
Environmental Risk Factors ◽  
Colorectal Cancer Risk ◽  
Early Onset Colorectal Cancer

scholarly journals High prevalence of TP53 loss and whole-genome doubling in early-onset colorectal cancer

2021 ◽  
Author(s):  
Jeong Eun Kim ◽  
Jaeyong Choi ◽  
Chang-Ohk Sung ◽  
Yong Sang Hong ◽  
Sun Young Kim ◽  
...  
Keyword(s):  
Colorectal Cancer ◽  
Early Onset ◽  
Large Scale ◽  
Late Onset ◽  
Age Groups ◽  
The Cancer Genome Atlas ◽  
Whole Genome ◽  
Genome Doubling ◽  
Whole Genome Doubling ◽  
Early Onset Colorectal Cancer

AbstractThe global incidence of early-onset colorectal cancer (EO-CRC) is rapidly rising. However, the reason for this rise in incidence as well as the genomic characteristics of EO-CRC remain largely unknown. We performed whole-exome sequencing in 47 cases of EO-CRC and targeted deep sequencing in 833 cases of CRC. Mutational profiles of EO-CRC were compared with previously published large-scale studies. EO-CRC and The Cancer Genome Atlas (TCGA) data were further investigated according to copy number profiles and mutation timing. We classified colorectal cancer into three subgroups: the hypermutated group consisted of mutations in POLE and mismatch repair genes; the whole-genome doubling group had early functional loss of TP53 that led to whole-genome doubling and focal oncogene amplification; the genome-stable group had mutations in APC and KRAS, similar to conventional colon cancer. Among non-hypermutated samples, whole-genome doubling was more prevalent in early-onset than in late-onset disease (54% vs 38%, Fisher’s exact P = 0.04). More than half of non-hypermutated EO-CRC cases involved early TP53 mutation and whole-genome doubling, which led to notable differences in mutation frequencies between age groups. Alternative carcinogenesis involving genomic instability via loss of TP53 may be related to the rise in EO-CRC.

scholarly journals Prevenire la radicalizzazione e i comportamenti antisociali. Madri e bambini nei non-luoghi dell’educabilità

2021 ◽  
Vol 19 (2) ◽  
pp. 121-129
Author(s):  
Raffaella Biagioli
Keyword(s):  
Risk Factors ◽  
At Risk ◽  
Gender Difference ◽  
Social Inclusion ◽  
Daily Life ◽  
Population At Risk ◽  
Child Relationship ◽  
The Future ◽  
Mother Child Relationship

In the intersection with other dimensions such as ethnic, religious and social, the gender difference leads to dwell on aspects often neglected and to bring out the role of mothers in places of confinement that, together with their children, represent a population at risk for the difficulties inherent in the condition of restriction. The research is interested in understanding a mother-child relationship highly disturbed by some risk factors and the educational actions to be activated in the daily life of penitentiary institutions to support and accompany these women towards autonomy, to offer them possibilities of social inclusion and avoid marginalization that in the future could lead their children to seek radicalized insertion within groups.

scholarly journals Tumor-Associated Macrophages (TAMs) in Colorectal Cancer (CRC): From Mechanism to Therapy and Prognosis

2021 ◽  
Vol 22 (16) ◽  
pp. 8470
Author(s):  
Hui Wang ◽  
Tian Tian ◽  
Jinhua Zhang
Keyword(s):  
Colorectal Cancer ◽  
Clinical Care ◽  
Inflammatory Cells ◽  
Genetic Alterations ◽  
Tumor Associated Macrophages ◽  
Invasion And Migration ◽  
Complex Process ◽  
Incidence And Mortality ◽  
And Migration

Colorectal cancer (CRC) is a malignant tumor in the digestive system whose incidence and mortality is high-ranking among tumors worldwide. The initiation and progression of CRC is a complex process involving genetic alterations in cancer cells and multiple factors from the surrounding tumor cell microenvironment. As accumulating evidence has shown, tumor-associated macrophages (TAMs)—as abundant and active infiltrated inflammatory cells in the tumor microenvironment (TME)—play a crucial role in CRC. This review focuses on the different mechanisms of TAM in CRC, including switching of phenotypical subtypes; promoting tumor proliferation, invasion, and migration; facilitating angiogenesis; mediating immunosuppression; regulating metabolism; and interacting with the microbiota. Although controversy remains in clinical evidence regarding the role of TAMs in CRC, clarifying their significance in therapy and the prognosis of CRC may shed new light on the optimization of TAM-centered approaches in clinical care.

scholarly journals Study of the Relationship between Microbiome and Colorectal Cancer Susceptibility Using 16SrRNA Sequencing

2020 ◽  
Vol 2020 ◽  
pp. 1-17 ◽  
Author(s):  
Wanxin Liu ◽  
Ren Zhang ◽  
Rong Shu ◽  
Jinjing Yu ◽  
Huan Li ◽  
...  
Keyword(s):  
Colorectal Cancer ◽  
Gut Microbiota ◽  
Cancer Susceptibility ◽  
Precancerous Lesions ◽  
Bacterial Community Composition ◽  
Intestinal Flora ◽  
Control Group ◽  
Healthy Controls ◽  
Healthy Individuals

A lot of previous studies have recently reported that the gut microbiota influences the development of colorectal cancer (CRC) in Western countries, but the role of the gut microbiota in Chinese population must be investigated fully. The goal of this study was to determine the role of the gut microbiome in the initiation and development of CRC. We collected fecal samples of 206 Chinese individuals: 59 with polyp (group P), 54 with adenoma (group A), 51 with colorectal cancer (group CC), and 42 healthy controls (group HC).16S ribosomal RNA (rRNA) was used to compare the microbiota community structures among healthy controls, patients with polyp, and those with adenoma or colorectal cancer. Our study proved that intestinal flora, as a specific indicator, showed significant differences in its diversity and composition. Sobs, Chao, and Ace indexes of group CC were significantly lower than those of the healthy control group (CC group: Sobs, Chao, and Ace indexes were 217.3 ± 69, 4265.1 ± 80.7, and 268.6 ± 78.1, respectively; HC group: Sobs, Chao, and Ace indexes were 228.8 ± 44.4, 272.9 ± 58.6, and 271.9 ± 57.2, respectively). When compared with the healthy individuals, the species richness and diversity of intestinal flora in patients with colorectal cancer were significantly reduced: PCA and PCoA both revealed that a significant separation in bacterial community composition between the CC group and HC group (with PCA using the first two principal component scores of PC1 14.73% and PC2 10.34% of the explained variance, respectively; PCoA : PC1 = 14%, PC2 = 9%, PC3 = 6%). Wilcox tests was used to analyze differences between the two groups, it reveals that Firmicutes (P=0.000356), Fusobacteria (P=0.000001), Proteobacteria (P=0.000796), Spirochaetes (P=0.013421), Synergistetes (P=0.005642) were phyla with significantly different distributions between cases and controls. The proportion of microorganism composition is varying at different stages of colon cancer development: Bacteroidetes (52.14%) and Firmicutes (35.88%) were enriched in the healthy individuals; on the phylum level, the abundance of Bacteroidetes (52.14%-53.92%-52.46%–47.06%) and Firmicutes (35.88%-29.73%-24.27%–25.36%) is decreasing with the development of health-polyp-adenomas-CRC, and the abundance of Proteobacteria (9.33%-12.31%-16.51%–22.37%) is increasing. PCA and PCOA analysis showed there was no significant (P<0.05) difference in species similarity between precancerous and carcinogenic states. However, the composition of the microflora in patients with precancerous lesions (including patients with adenoma and polyp) was proved to have no significant disparity (P<0.05). Our study provides insights into new angles to dig out potential biomarkers in diagnosis and treatment of colorectal cancer and to provide scientific advice for a healthy lifestyle for the sake of gut microbiota.

scholarly journals Effects of whole-grain wheat, rye, and lignan supplementation on cardiometabolic risk factors in men with metabolic syndrome: a randomized crossover trial

2020 ◽  
Vol 111 (4) ◽  
pp. 864-876
Author(s):  
Anne K Eriksen ◽  
Carl Brunius ◽  
Mohsen Mazidi ◽  
Per M Hellström ◽  
Ulf Risérus ◽  
...  
Keyword(s):  
Risk Factors ◽  
Metabolic Syndrome ◽  
Glucose Tolerance ◽  
Gut Microbiota ◽  
Ldl Cholesterol ◽  
Oral Glucose ◽  
Microbiota Composition ◽  
Whole Grain ◽  
The Metabolic Syndrome

ABSTRACT Background A whole-grain (WG)–rich diet has shown to have potential for both prevention and treatment of the metabolic syndrome (MetS), which is a cluster of risk factors that increase the risk of type 2 diabetes and cardiovascular disease. Different WGs may have different health effects. WG rye, in particular, may improve glucose homeostasis and blood lipids, possibly mediated through fermentable dietary fiber and lignans. Recent studies have also suggested a crucial role of the gut microbiota in response to WG. Objectives The aim was to investigate WG rye, alone and with lignan supplements [secoisolariciresinol diglucoside (SDG)], and WG wheat diets on glucose tolerance [oral-glucose-tolerance test (OGTT)], other cardiometabolic outcomes, enterolignans, and microbiota composition. Moreover, we exploratively evaluated the role of gut microbiota enterotypes in response to intervention diets. Methods Forty men with MetS risk profile were randomly assigned to WG diets in an 8-wk crossover study. The rye diet was supplemented with 280 mg SDG at weeks 4–8. Effects of treatment were evaluated by mixed-effects modeling, and effects on microbiota composition and the role of gut microbiota as a predictor of response to treatment were analyzed by random forest plots. Results The WG rye diet (± SDG supplements) did not affect the OGTT compared with WG wheat. Total and LDL cholesterol were lowered (−0.06 and −0.09 mmol/L, respectively; P &lt; 0.05) after WG rye compared with WG wheat after 4 wk but not after 8 wk. WG rye resulted in higher abundance of Bifidobacterium [fold-change (FC) = 2.58, P &lt; 0.001] compared with baseline and lower abundance of Clostridium genus compared with WG wheat (FC = 0.54, P = 0.02). The explorative analyses suggest that baseline enterotype is associated with total and LDL-cholesterol response to diet. Conclusions WG rye, alone or with SDG supplementation, compared with WG wheat did not affect glucose metabolism but caused transient LDL-cholesterol reduction. The effect of WG diets appeared to differ according to enterotype. This trial was registered at www.clinicaltrials.gov as NCT02987595.

Late-onset schizophrenia

2020 ◽  
pp. 671-694
Author(s):  
Ellen E. Lee ◽  
Baichun Hou ◽  
Ipsit V. Vahia ◽  
Dilip V. Jeste
Keyword(s):  
Risk Factors ◽  
Differential Diagnosis ◽  
Life Events ◽  
Genetic Risk ◽  
Psychiatric Symptoms ◽  
Late Onset ◽  
Sociodemographic Factors ◽  
Sensory Loss ◽  
Adverse Life Events

Late-onset schizophrenia remains an understudied subtype of schizophrenia, despite growing recognition of its impact and distinction from early-onset schizophrenia. This chapter reviews the existing literature on late-onset schizophrenia including beginning with the nomenclature and epidemiology. Then we provide a review of key risk factors and correlates—including genetic risk, sex differences, comorbid sensory loss and physical illness, cognitive and psychiatric symptoms, sociodemographic factors, adverse life events, neuropathology, and inflammation. The chapter ends with clinical issues, including symptoms, differential diagnosis, treatments, and prognosis. Recent studies have examined the role of oestrogen treatments and a new therapy for tardive dyskinesia therapy as well as inflammatory mechanisms in schizophrenia.

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