The Crohn's-Like Lymphoid Reaction to Colorectal Cancer-Tertiary Lymphoid Structures With Immunologic and Potentially Therapeutic Relevance in Colorectal Cancer

The Crohn’s-like lymphoid reaction (CLR) to colorectal cancer (CRC), a CRC-specific ectopic lymphoid reaction, is thought to play an important role in the host response to CRC. CLR is characterized by peritumoral lymphocytic aggregates that are found at the advancing edge of the tumor. Spatial and molecular characterization of CLR within the tumor microenvironment (TME) have uncovered a spectrum of peritumoral lymphoid aggregates with varying levels of organization and maturation. In early stages of CLR development, CD4+ T-cells cluster predominantly with mature antigen presenting dendritic cells. As CLR matures, increasing numbers of B-cells, as well as follicular dendritic cells, are recruited to create lymphoid follicles. When highly organized, CLR resembles functional tertiary lymphoid structures (TLS), allowing for lymphocyte recruitment to the TME and promoting a tumor-specific adaptive immune response. CLR has been consistently associated with favorable prognostic factors and improved survival among CRC patients, often providing more prognostic information than current clinical staging systems. However, consensus is lacking regarding CLR scoring and it is not clinically assessed or reported. Differences between CLR and other cancer-associated lymphoid structures exist both in primary and metastatic disease, underscoring the need to characterize organ-specific TLS. Further research is needed to explore the role of CLR in predicting response to immunotherapy and to...
Source: Frontiers in Immunology - Category: Allergy & Immunology Source Type: research

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Abstract Patients with long-standing inflammatory bowel disease (IBD) involving at least 1/3 of the colon are at increased risk for colorectal cancer (CRC). Advancements in CRC screening and surveillance and improved treatment of IBD has reduced CRC incidence in patients with ulcerative colitis and Crohn's colitis. Most cases of CRC are thought to arise from dysplasia, and recent evidence suggests that the majority of dysplastic lesions in patients with IBD are visible, in part thanks to advancements in high definition colonoscopy and chromoendoscopy. Recent practice guidelines have supported the use of chromoendo...
Source: World Journal of Gastroenterology - Category: Gastroenterology Authors: Tags: World J Gastroenterol Source Type: research
Abstract Estrogens play important roles in the development and progression of multiple tumor types. Accumulating evidence points to the significance of estrogen action not only in tumors of hormonally regulated tissues such as the breast, endometrium and ovary, but also in the development of colorectal cancer (CRC). The effects of estrogens in physiological and pathophysiological conditions are mediated by the nuclear estrogen receptors α and β, as well as the membrane-bound G protein-coupled estrogen receptor (GPER). The roles of GPER in CRC development and progression, however, remain poorly understoo...
Source: World Journal of Gastroenterology - Category: Gastroenterology Authors: Tags: World J Gastroenterol Source Type: research
In conclusion, the author emphasises the importance of investigating colorectal mucus in IBD and CRC patients as a previously unexplored milieu of disease-related inflammatory responses. PMID: 31367153 [PubMed - in process]
Source: World Journal of Gastroenterology : WJG - Category: Gastroenterology Authors: Tags: World J Gastroenterol Source Type: research
Authors: Chou JW, Lai HC, Chang CH, Cheng KS, Feng CL, Chen TW Abstract The incidence and prevalence of inflammatory bowel disease (IBD) are low but increasing in Taiwan. We aimed to investigate the epidemiology and clinical outcomes of IBD in central Taiwan. We retrospectively analyzed patients with IBD diagnosed at our hospital between January 2000 and September 2018. The diagnostic criteria were based on endoscopic and pathologic findings. Clinical characteristics, treatment regimens, and treatment outcomes were analyzed. A total of 190 patients with IBD were enrolled (80 with Crohn's disease (CD) and 110 with u...
Source: Gastroenterology Research and Practice - Category: Gastroenterology Tags: Gastroenterol Res Pract Source Type: research
Abstract BACKGROUND AND AIM: Fecal calprotectin has successfully been widely recommended as a sensitive biomarker of inflammatory bowel diseases (IBD). Recently, we have identified an excellent new fecal biomarker, B-cell activating factor (BAFF), as effective as fecal calprotectin for diagnosing intestinal inflammation. Here in this study, we sought to investigate the potential of fecal BAFF as a screening marker for gastrointestinal inflammation and neoplasms in patients with abdominal discomfort. METHODS: 230 patients with abdominal discomfort were prospectively enrolled into this study and fecal samples w...
Source: Clinical and Developmental Immunology - Category: Allergy & Immunology Authors: Tags: Clin Exp Immunol Source Type: research
Abstract BACKGROUND: Different histological growth patterns (HGPs) of colorectal carcinoma (CRC) liver metastasis are associated with patients' prognosis and response to antiangiogenic therapy. However, the relationship between HGPs of liver metastasis and clinicopathological and genomic characteristics of primary cancer has not been well established. AIM: To assess whether certain clinicopathological and genomic features of primary CRC could predict the HGPs of liver metastasis. METHODS: A total of 29 patients with paired resections of both primary CRC and liver metastasis were divided into two groups: ...
Source: World Journal of Gastroenterology : WJG - Category: Gastroenterology Authors: Tags: World J Gastroenterol Source Type: research
ConclusionsThis review shows an overview of the genetic and environmental factors that appear to influence both the occurrence of IBD and CRC with particular reference toNOD2 andTLRs as well as pro- and anti-inflammatory cytokines associated with tumor initiation and progression (encompassing both tumor invasion and metastases), as they constitute potential targets for therapeutic intervention.
Source: Hereditary Cancer in Clinical Practice - Category: Cancer & Oncology Source Type: research
CONCLUSION: Reversal colostomy procedure resulted in significant morbidity and mortality, particularly in those with high BMI and ASA scores. Efforts to improve risk management and specialization in colorectal surgery may help to improve the outcome in reversal colostomy after Hartmann's procedure. KEY WORDS: Hartmann's procedure, reversal colostomy, morbidity, colorectal surgery, experience. PMID: 31270277 [PubMed - as supplied by publisher]
Source: Annali Italiani di Chirurgia - Category: Surgery Tags: Ann Ital Chir Source Type: research
This article reviews the current literature regarding Crohn's disease and subsequent risk of cancer formation. Recognition of risk factors (both modifiable and unmodifiable) is essential for prevention and appropriate screening. Future investigations into the molecular mechanisms associated with Crohn-related malignancy will provide additional insight into carcinogenesis, potential for early intervention, and identification of at-risk patients. [...] Thieme Medical Publishers 333 Seventh Avenue, New York, NY 10001, USA.Article in Thieme eJournals: Table of contents  |  Abstract  |  Full text
Source: Clinics in Colon and Rectal Surgery - Category: Surgery Authors: Tags: Review Article Source Type: research
CONCLUSIONS: Patients with PSC show significantly higher than average risk for the development of hepatobiliary and colonic malignancies including cholangiocarcinoma, gallbladder carcinoma and colorectal carcinoma. Yearly ultrasound surveillance followed with more definitive cross sectional imaging is prudent to arrive in a timely diagnosis of carcinoma, reducing morbidity and mortality. PMID: 31220911 [PubMed - as supplied by publisher]
Source: Minerva Gastroenterologica e Dietologica - Category: Gastroenterology Tags: Minerva Gastroenterol Dietol Source Type: research
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