Abstract 2358: Porphyromonas gingivalis promotes colorectal cancer development by regulating NLRP3 inflammasome signaling

Author(s):  
Zhi Wang ◽  
Xi Wang ◽  
Yiqun Jia
2018 ◽  
Vol 9 ◽  
Author(s):  
Patricia Ahechu ◽  
Gabriel Zozaya ◽  
Pablo Martí ◽  
José Luis Hernández-Lizoáin ◽  
Jorge Baixauli ◽  
...  

2011 ◽  
Vol 49 (05) ◽  
Author(s):  
I Hritz ◽  
Z Varga ◽  
M Juhász ◽  
P Miheller ◽  
Z Tulassay ◽  
...  

2020 ◽  
Vol 22 (1) ◽  
pp. 137-145
Author(s):  
Tomasz Mackiewicz ◽  
Aleksander Sowa ◽  
Jakub Fichna

: Colitis-associated colorectal cancer (CAC) remains a critical complication of ulcerative colitis (UC) with mortality of approximately 15%, which makes early CAC diagnosis crucial. The current standard of surveillance, with repetitive colonoscopies and histological testing of biopsied mucosa samples is burdensome and expensive, and therefore less invasive methods and reliable biomarkers are needed. Significant progress has been made thanks to continuous extensive research in this field, however no clinically relevant biomarker has been established so far. This review of the current literature presents the genetic and molecular differences between CAC and sporadic colorectal cancer and covers progress made in the early detection of CAC carcinogenesis. It focuses on biomarkers under development, which can be easily tested in samples of body fluids or breath and, once made clinically available, will help to differentiate between progressors (UC patients who will develop dysplasia) from non-progressors and enable early intervention to decrease the risk of cancer development.


2012 ◽  
Vol 1 (1) ◽  
pp. 37-47
Author(s):  
Karam Singh Boparai ◽  
Yark Hazewinkel ◽  
Evelien Dekker

2021 ◽  
pp. 1-17
Author(s):  
Wanyi Huang ◽  
Fan Zeng ◽  
Yebo Gu ◽  
Muzhou Jiang ◽  
Xinwen Zhang ◽  
...  

Background: Studies have reported that synaptic failure occurs before the Alzheimer’s disease (AD) onset. The systemic Porphyromonas gingivalis (P. gingivalis) infection is involved in memory decline. We previously showed that leptomeningeal cells, covering the brain, activate glial cells by releasing IL-1β in response to systemic inflammation. Objective: In the present study, we focused on the impact of leptomeningeal cells on neurons during systemic P. gingivalis infection. Methods: The responses of leptomeningeal cells and cortical neurons to systemic P. gingivalis infection were examined in 15-month-old mice. The mechanism of IL-1β production by P. gingivalis infected leptomeningeal cells was examined, and primary cortical neurons were treated with P. gingivalis infected leptomeningeal cells condition medium (Pg LCM). Results: Systemic P. gingivalis infection increased the expression of IL-1β in leptomeninges and reduced the synaptophysin (SYP) expression in leptomeninges proximity cortex in mice. Leptomeningeal cells phagocytosed P. gingivalis resulting in lysosomal rupture and Cathepsin B (CatB) leakage. Leaked CatB mediated NLRP3 inflammasome activation inducing IL-1β secretion in leptomeningeal cells. Pg LCM decreased the expression of synaptic molecules, including SYP, which was inhibited by an IL-1 receptor antagonist pre-treatment. Conclusion: These observations demonstrate that P. gingivalis infection is involved in synaptic failure by inducing CatB/NLRP3 inflammasome-mediated IL-1β production in leptomeningeal cells. The periodontal bacteria-induced synaptic damage may accelerate the onset and cognitive decline of AD.


2015 ◽  
Vol 148 (4) ◽  
pp. S-577
Author(s):  
Johan Gagnière ◽  
Jennifer Raisch ◽  
nicolas parisot ◽  
Bruno Pereira ◽  
Virginie Bonnin ◽  
...  

2020 ◽  
Vol 6 (1) ◽  
Author(s):  
Shinsei Yumoto ◽  
Yuji Miyamoto ◽  
Takahiko Akiyama ◽  
Yuki Kiyozumi ◽  
Kojiro Eto ◽  
...  

Abstract Background The incidence of synchronous gastrointestinal neuroendocrine tumors (GI-NETs) and colorectal cancer is very low. Case presentation We present a 72-year-old man diagnosed with a rectal neuroendocrine tumor (NET) with multiple organ metastases and simultaneous sigmoid colon cancer. Although the NET was his prognostic factor, he underwent a laparoscopic sigmoidectomy at first because it was expected that the colon cancer would cause obstruction or bleeding during NET treatment. Subsequently, he started taking everolimus. Conclusions We should consider surgical resection of the synchronous cancer before systemic therapy for a GI-NET regardless of the difference in prognosis between synchronous tumors, if the cancer may impair the continuation of systemic therapy.


2009 ◽  
Vol 15 (12) ◽  
pp. 4009-4016 ◽  
Author(s):  
Nobutake Yamamichi ◽  
Ryoichi Shimomura ◽  
Ken-ichi Inada ◽  
Kouhei Sakurai ◽  
Takeshi Haraguchi ◽  
...  

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