Impact of Covid-19 Pandemic on Gastrointestinal Cancer Patients: An Emphasis on Colorectal Cancer

Author(s):  
Krishna Patel ◽  
Nuri Hamby ◽  
Sohail Siraj ◽  
Ananya Kurri ◽  
Riyaz Basha
2007 ◽  
Vol 25 (18_suppl) ◽  
pp. 21052-21052
Author(s):  
H. Iinuma ◽  
K. Okinaga ◽  
T. Watanabe ◽  
R. Fukushima ◽  
T. Inaba ◽  
...  

21052 Background: The prediction of peritoneal recurrence in gastrointestinal cancer patients is extremely important in order to prevent an unfavorable prognosis. The aim of our study was to evaluate the usefulness of a novel rapid RNA amplification system with transcription-reverse transcription concerted reaction (TRC) to detect isolated tumor cells in peritoneal washes of gastrointestinal cancer patients as an intra-operative genetic predictor of peritoneal recurrence. To clarify the characteristic qualities of TRC, we compared the results with those of one-step real-time RT-PCR. Methods: A total of 325 cytology-negative gastrointestinal cancer patients (164 gastric cancer, 161 colorectal cancer) were included. This study was approved by the institutional review board of our hospital and all patients provided written informed consent. Peritoneal washes of Douglas cavity were collected from patients. One-half of each wash was used for cytopathology and the other half was used for molecular diagnosis. Total RNA was extracted from cells which were separated from washes, and TRC and one-step real-time RT-PCR of multiple marker genes (CEA, CK20 mRNA) were performed using a TRCRapid-160 and LightCycler, respectively. Results: The rapidity and simplicity of the TRC is superior to that of one-step real-time RT-PCR. The detection time of marker genes by TRC was only 20 minutes as compared to 70 minutes of real-time RT-PCR. The sensitivity and reproducibility of the TRC were equal to those of real-time RT-PCR. Molecular detection of CEA and/or CK20 transcripts of the peritoneal washes by TRC showed a significant correlation to the depth of invasion, venous invasion, lymph node invasion, lymph node metastasis, peritoneal metastasis and stage. The peritoneal recurrence- free and overall survival rates of CEA and/or CK20 transcript-positive patients were significantly shorter than those of marker gene-negative patients. CEA and/or CK20 transcripts in peritoneal washes were independent prognostic factors of peritoneal recurrence-free survival and overall survival. Conclusion: TRC may be more useful than real-time RT-PCR due to its rapidity and simplicity for the intra-operative genetic diagnosis of peritoneal recurrence in patients with gastric and colorectal cancer. No significant financial relationships to disclose.


2020 ◽  
Author(s):  
Ningning Li ◽  
Chunmei Bai ◽  
Yuanzhi Guan ◽  
Lin Zhao ◽  
Yuping Ge ◽  
...  

Abstract Background The incidence and mortality of gastrointestinal tumors are high in China. Some studies suggested that the gut microbiota is also related to the occurrence and development of tumors. At present, there are no prospective studies based on the correlation between gastrointestinal tumors and gut microbiota in the Chinese population. The objective of this report is to characterize the fecal microbiota in patients with esophageal cancer, gastric cancer, and colorectal cancer and healthy controls. Methods Patients with locally advanced or metastatic esophageal, gastric, and colorectal cancer were enrolled, and healthy people were included as controls. 16S rRNA sequencing was used to analyze the characteristics of fecal microbiota. PICRUSt software was used for functional prediction.Results Significant differences in the composition and abundance of fecal microbiota were identified between gastrointestinal cancer patients and healthy controls. The abundance of F. prausnitzii, C. clostridioforme, and B. adolescents in three different tumor groups was all significantly lower than in the control group (P<0.05). The abundance of R. gnavus, B. obeum, and R. faecis in the gastric and colorectal cancer groups was significantly lower than in the control group (P<0.05). The abundance of Dorea in the gastric cancer group was significantly lower than in the control group (P<0.05). B. fragilis, P. corpi, and E. coli were overabundant in the different tumor groups compared with the control (P<0.05). There were significant differences in functional metabolism and cell biological function between the tumor and control groups (P<0.05). The feces of cancer patients with more advanced staging had higher abundance of Prevotella and fewer Clostridium. Conclusions Patients with esophageal or gastric cancer had similar features of fecal bacteria as those with colorectal cancer. The metabolic function of fecal bacteria in the gastrointestinal cancer patients and the healthy controls were different.


2018 ◽  
Vol 37 (11) ◽  
pp. 1015-1024
Author(s):  
Fabiola Müller ◽  
Marrit A. Tuinman ◽  
Ellen Stephenson ◽  
Ans Smink ◽  
Anita DeLongis ◽  
...  

2019 ◽  
Author(s):  
Julia Sánchez-Gundín ◽  
Cristina Martín-Sabroso ◽  
Ana M. Fernández-Carballido ◽  
D. Barreda-Hernández ◽  
Ana I. Torres-Suárez

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