AIM To investigate the efficacy and safety of stellate ganglion block for the treatment of patients with chronic ulcerative colitis.METHODS A total of 120 randomly selected patients with chronic ulcerative colitis tre...AIM To investigate the efficacy and safety of stellate ganglion block for the treatment of patients with chronic ulcerative colitis.METHODS A total of 120 randomly selected patients with chronic ulcerative colitis treated in Cangzhou Central Hospital from January 2014 to January 2016 were included in this study. These patients were divided into two groups: control group(n = 30), patients received oral sulfasalazine treatment; experimental group(n = 90), patients received stellate ganglion block treatment. Clinical symptoms and disease activity in these two groups were compared before and after treatment using endoscopy. Blood was collected from patients on day 0, 10, 20 and 30 after treatment. Enzyme-linked immunosorbent assay was performed to determine interleukin-8(IL-8) level. The changes in IL-8 level post-treatment in the two groups were compared using repeated measures analysis of variance.RESULTS After treatment, clinical symptoms and disease activity were shown to be alleviated by endoscopy in both the control and experimental groups. However, patients in the control group did not have obvious abdominal pain relief. In addition, the degree of pain relief in the experimental group was statistically better than that in the control group(P < 0.05). Ten days after treatment, IL-8 level was found to be significantly lower in the experimental group than in the control group, and the difference was statistically significant(P < 0.05). In addition, adverse events were significantly higher in the control group than in the experimental group, and the difference was statistically significant(χ~2 = 33.215, P = 0.000).CONCLUSION The application of stellate ganglion block effectively improves treatment efficacy in chronic ulcerative colitis, relieves clinical symptoms in patients, and reduces the level of inflammatory factors. Furthermore, this approach also had a positive impact on the disease to a certain extent.展开更多
Sympathetic system modulation by stellate ganglion blockade may modulate immune dysfunction and significantly improve symptoms of chronic ulcerative colitis.
Chronic granulomatous disease(CGD) is a primary immune deficiency that is commonly diagnosed under the age of 5 years(95%) and is rarely seen in adulthood. CGD may manifest as inflammatory bowel disease(IBD) in childh...Chronic granulomatous disease(CGD) is a primary immune deficiency that is commonly diagnosed under the age of 5 years(95%) and is rarely seen in adulthood. CGD may manifest as inflammatory bowel disease(IBD) in childhood. Without proper diagnosis, these patients may be monitored for years as IBD; some may even be regarded as steroid-resistant ulcerative colitis(UC) and end up having a colectomy. In this case report, we described a patient who had been followedup for years as UC and subsequently underwent colectomy, but was finally diagnosed in adulthood as primary immune deficiency.展开更多
Recently,the use of confocal laser endomicroscopy(CLE) in the diagnosis of chronic ulcerative colitis(CUC) was reported.In this brief report we aimed to assess the application of probe-based CLE to characterize coloni...Recently,the use of confocal laser endomicroscopy(CLE) in the diagnosis of chronic ulcerative colitis(CUC) was reported.In this brief report we aimed to assess the application of probe-based CLE to characterize colonic mucosa and dysplasia in CUC.The study involved a patient presenting long-standing CUC.Confocal imaging of both the inflamed mucosa,a circumscribed lesion(dysplasiaassociated lesional mass),and adjacent colonic mucosa are demonstrated and the correlation between the CLE and histological images.Inflamed mucosa and dysplasia showed specific alteration of crypt architecture,cellular infiltration,and vessel architecture with an excellent correlation between CLE and standard histological examination.展开更多
BACKGROUND Patients with ulcerative colitis(UC) may be exposed to opioids over their disease duration. The use of such medications carries significant risk, including intestinal dysmotility and potential for addiction...BACKGROUND Patients with ulcerative colitis(UC) may be exposed to opioids over their disease duration. The use of such medications carries significant risk, including intestinal dysmotility and potential for addiction. However, the rates of narcotic use and misuse in patients with UC have not been studied extensively. Functional gastrointestinal disorders(FGID) are prevalent in patients with UC, and have been shown to increase the risk of narcotic use and misuse in patients with Crohn's disease. We hypothesized that patients with UC and a concurrent diagnosis of FGID would have increased rates of both opioid use and misuse in our patient cohort.AIM To evaluate the prevalence of chronic opioid use and misuse in UC.METHODS A retrospective chart review of UC patients seen at the University of Virginia Digestive Health Center was performed on all patients evaluated between 2006 and 2011. Patient demographics, medical, surgical, and medication histories were obtained from the electronic medical record. Concomitant diagnosis of FGID was also noted at the time. The electronic prescription monitoring program was accessed to obtain prescription opioid filling histories. Prescription opioid misuse was defined as opioid prescriptions filled from four or more prescribers and four or more different pharmacies in a 12-mo period.RESULTS A total of 497 patients with UC were included. Patients with UC and FGID were more likely to be female, but no other demographic variables were associated with FGID. Of the UC patients who had FGID, a greater proportion were found to be using opioids chronically(36% with FGID vs 9% without FGID, P < 0.0001)and were misusing prescription opioids(12.8% vs 1.3%, P < 0.001). Multivariate logistic regression demonstrated a significant association with FGID and chronic opioid use(OR = 4.50; 95%CI: 1.91-10.59) and opioid misuse(OR = 5.19; 95%CI1.04-25.76). Tobacco use(OR 2.53; 95%CI: 1.06-6.08) and anxiety(OR 3.17; 95%CI:1.08-9.26) were other variables associated with an increased risk of chronic narcotic use.CONCLUSION FGID was associated with a 4.5-fold increase in chronic opioid use and a 5-fold increased risk of opioid misuse in this patient cohort with UC.展开更多
AIM To explore the influence of Infliximab(IFX) on cancer progression in a murine model of colonic cancer associated to chronic colitis.METHODS AOM/DSS model was induced in C57BL/6 mice. Mice were injected with IFX(5 ...AIM To explore the influence of Infliximab(IFX) on cancer progression in a murine model of colonic cancer associated to chronic colitis.METHODS AOM/DSS model was induced in C57BL/6 mice. Mice were injected with IFX(5 mg/kg) during each DSS cycle while control mice received saline. Body weight, occult blood test and stool consistency were measured to calculate the disease activity index(DAI). Mice were sacrificed at week 10 and colons were analyzed macroscopically and microscopically for number of cancers and degree of inflammation. MTT assay was performed on CT26 to evaluate the potential IFX role on metabolic activity and proliferation. Cells were incubated with TNF-α or IFX or TNF-α plus IFX, and cell vitality was evaluated after 6, 24 and 48 h. The same setting was used after pre-incubation with TNF-α for 24 h.RESULTS IFX significantly reduced DAI and body weight loss in mice compared with controls, preserving also colon length at sacrifice. Histological score was also reduced in treated mice. At macroscopic analysis, IFX treated mice showed a lower number of tumor lesions compared to controls. This was confirmed at microscopic analysis, although differences were not statistically significant. In vitro, IFX treated CT26 maintained similar proliferation ability at MTT test, both when exposed to IFX alone and when associated to TNF-α.CONCLUSION IFX did not increase colonic cancer risk in AOM-DSS model of cancer on chronic colitis nor influence directly the proliferation of murine colon cancer epithelial cells.展开更多
Background The incidence of chronic ulcerative colitis (CUC) in China is remarkably increasing, while little information on surgical treatment has been reported. This study aimed to completely describe and analyze t...Background The incidence of chronic ulcerative colitis (CUC) in China is remarkably increasing, while little information on surgical treatment has been reported. This study aimed to completely describe and analyze the clinical outcome of restorative proctocolectomy with ileal pouch-anal anastomosis (IPAA)for CUC in China. Methods Ninety-five consecutive patients, who suffered CUC and had surgical indications, were carefully selected. All patients underwent IPAA. Data on patient characteristics, surgical indications, surgical details, postoperative complications, functional outcome, and quality of life were collected. Results The mean patient age at the time of the operation was 32 years. Twenty-nine (31%) patients underwent an emergency operation, and 66 (69%) underwent elective procedures. Four patients with severe dysplasia underwent operations, but no carcinoma was histologically confirmed. A two-stage operation was performed in 87 (92%) patients, and a hand-sewn technique was applied in 88 (93%) patients. Sixteen patients (17.0%) experienced early complications, and there was a significant difference between the emergency surgery group and the elective group (31.0% vs. 10.6%, respectively; P 〈0.01). Five (5.3%) patients developed pouchitis as a late complication. The mean stool frequency after the operation was 4.6 (2-11) during the first 24 hours and 1.5 (0-4) overnight. According to the Kirwan grading scale, 87 (91.8%) patients showed satisfactory anal continence function. The quality of life improved significantly from a preoperative mean value of 0.28-0.61 before ileostomy closure to 0.78 after ileostomy closure (P 〈0.01) according to the Cleveland Global Quality of Life index. Conclusions IPAA is an effective and safe surgical procedure for patients with CUC in China. However, some characteristics, such as the low incidence of pouchitis, require further study.展开更多
Interferon(IFN)is a multifaceted immunomodulator that is effective against many diseases,including chronic hepatitis B and chronic hepatitis C infection.IFN defends against viral infection,but may also cause various s...Interferon(IFN)is a multifaceted immunomodulator that is effective against many diseases,including chronic hepatitis B and chronic hepatitis C infection.IFN defends against viral infection,but may also cause various side effects,such as ulcerative colitis(UC).Herein,we present a case of UC triggered by pegylated interferon alpha-2b(PEG-IFN-α-2b)therapy in a patient with concurrent chronic hepatitis B(CHB)infection.The diagnosis was based on typical clinical symptoms,colonoscopy findings,colonic mucosal biopsy,and histopathology.Accordingly,treatment with mesalazine was initiated without stopping PEG-IFN-α-2b.Fortunately,UC relieved gradually without compromising the effects of treatment.Simultaneously,we conducted a literature review of previously published case reports on the side effect of UC in patients with underlying chronic hepatitis.Various reactions have been reported,including induction,exacerbation,and no change.This is the first report of UC triggered by PEG-IFN-α-2b in a CHB patient.We recommend that physicians pay attention to the rare side effect of UC during administration of PEG-IFN-α-2b.Mesalazine can relieve UC with sustained use of PEG-IFN-α-2b.展开更多
BACKGROUND There is a growing evidence regarding an increased risk of inflammatory bowel disease(IBD)among patients with airway diseases.AIM To investigate the influence of chronic obstructive pulmonary disease(COPD)o...BACKGROUND There is a growing evidence regarding an increased risk of inflammatory bowel disease(IBD)among patients with airway diseases.AIM To investigate the influence of chronic obstructive pulmonary disease(COPD)on the risk of IBD.METHODS A nationwide,population-based study was conducted using data from the National Health Insurance Service database.A total of 1303021 patients with COPD and 6515105 non-COPD controls were identified.The COPD group was divided into the severe and the mild COPD group according to diagnostic criteria.The risk of IBD in patients with COPD compared to controls was analyzed by Cox proportional hazard regression models.The cumulative incidences of IBD were compared between the groups.RESULTS The COPD group had higher incidences of IBD compared to non-COPD controls(incidence rate,9.98 vs 7.18 per 100000 person-years,P<0.001).The risk of IBD in the COPD group was increased by 1.38(adjusted hazard ratio(HR);95%CI:1.25-1.52).The incidence rate of IBD was higher in the severe COPD group than in the mild COPD group(12.39 vs 9.77 per 100000 person-year,P<0.001).The severity of COPD was associated with an increased risk of IBD(adjusted HR 1.70 in severe COPD,95%CI:1.27-2.21 and adjusted HR 1.35 in mild COPD,95%CI:1.22-1.49)CONCLUSION The incidences of IBD were significantly increased in COPD patients in South Korea and the risk of developing IBD also increased as the severity of COPD increased.展开更多
Bacterial DNA(bacDNA) is frequently found in serum of patient with ulcerative colitis(UC) and Crohn's disease, even blood bacterial culture is negative. How bacDNA evades immune elimination and is translocated int...Bacterial DNA(bacDNA) is frequently found in serum of patient with ulcerative colitis(UC) and Crohn's disease, even blood bacterial culture is negative. How bacDNA evades immune elimination and is translocated into blood remain unclear. Here, we showed that bacDNA avoids elimination and disables bacteriakilling function of antimicrobial peptide LL-37(Cramp in mice) by forming complex with LL-37, which is inducible after culture with bacteria or bacterial products. Elevated LL-37-bacDNA complex was found in plasma and lesions of patients with UC. LL-37-bacDNA promoted inflammation by inducing Th1, Th2 and Th17 differentiation and activating toll-like receptor-9(TLR9). The complex also increased paracellular permeability, which possibly combines its inflammatory effects to promote local damage and bacDNA translocation into blood. Cramp-bacDNA aggravated mouse colitis severity while interference with the complex ameliorated the disease. The study identifies that inflammatogenic bacDNA utilizes LL-37 as a vehicle for blood translocation and to evade immune elimination. Additionally, bacteria may make a milieu by releasing bacDNA to utilize and resist host antimicrobial peptides as a ‘trojan horse'.展开更多
Inflammatory bowel disease(IBD)causes systemic vascular inflammation.The increased risk of venous as well as arterial thromboembolic phenomena in IBD is well established.More recently,a relationship between IBD and at...Inflammatory bowel disease(IBD)causes systemic vascular inflammation.The increased risk of venous as well as arterial thromboembolic phenomena in IBD is well established.More recently,a relationship between IBD and atherosclerotic cardiovascular disease(ASCVD)has been postulated.Systemic inflammatory diseases,such as rheumatoid arthritis and systemic lupus erythematosus,have well characterized cardiac pathologies and treatments that focus on prevention of disease associated ASCVD.The impact of chronic inflammation on ASCVD in IBD remains poorly characterized.This manuscript aims to review and summarize the current literature pertaining to IBD and ASCVD with respect to its pathophysiology and impact of medications in order to encourage further research that can improve understanding and help develop clinical recommendations for prevention and management of ASCVD in patients with IBD.展开更多
文摘AIM To investigate the efficacy and safety of stellate ganglion block for the treatment of patients with chronic ulcerative colitis.METHODS A total of 120 randomly selected patients with chronic ulcerative colitis treated in Cangzhou Central Hospital from January 2014 to January 2016 were included in this study. These patients were divided into two groups: control group(n = 30), patients received oral sulfasalazine treatment; experimental group(n = 90), patients received stellate ganglion block treatment. Clinical symptoms and disease activity in these two groups were compared before and after treatment using endoscopy. Blood was collected from patients on day 0, 10, 20 and 30 after treatment. Enzyme-linked immunosorbent assay was performed to determine interleukin-8(IL-8) level. The changes in IL-8 level post-treatment in the two groups were compared using repeated measures analysis of variance.RESULTS After treatment, clinical symptoms and disease activity were shown to be alleviated by endoscopy in both the control and experimental groups. However, patients in the control group did not have obvious abdominal pain relief. In addition, the degree of pain relief in the experimental group was statistically better than that in the control group(P < 0.05). Ten days after treatment, IL-8 level was found to be significantly lower in the experimental group than in the control group, and the difference was statistically significant(P < 0.05). In addition, adverse events were significantly higher in the control group than in the experimental group, and the difference was statistically significant(χ~2 = 33.215, P = 0.000).CONCLUSION The application of stellate ganglion block effectively improves treatment efficacy in chronic ulcerative colitis, relieves clinical symptoms in patients, and reduces the level of inflammatory factors. Furthermore, this approach also had a positive impact on the disease to a certain extent.
文摘Sympathetic system modulation by stellate ganglion blockade may modulate immune dysfunction and significantly improve symptoms of chronic ulcerative colitis.
文摘Chronic granulomatous disease(CGD) is a primary immune deficiency that is commonly diagnosed under the age of 5 years(95%) and is rarely seen in adulthood. CGD may manifest as inflammatory bowel disease(IBD) in childhood. Without proper diagnosis, these patients may be monitored for years as IBD; some may even be regarded as steroid-resistant ulcerative colitis(UC) and end up having a colectomy. In this case report, we described a patient who had been followedup for years as UC and subsequently underwent colectomy, but was finally diagnosed in adulthood as primary immune deficiency.
文摘Recently,the use of confocal laser endomicroscopy(CLE) in the diagnosis of chronic ulcerative colitis(CUC) was reported.In this brief report we aimed to assess the application of probe-based CLE to characterize colonic mucosa and dysplasia in CUC.The study involved a patient presenting long-standing CUC.Confocal imaging of both the inflamed mucosa,a circumscribed lesion(dysplasiaassociated lesional mass),and adjacent colonic mucosa are demonstrated and the correlation between the CLE and histological images.Inflamed mucosa and dysplasia showed specific alteration of crypt architecture,cellular infiltration,and vessel architecture with an excellent correlation between CLE and standard histological examination.
文摘BACKGROUND Patients with ulcerative colitis(UC) may be exposed to opioids over their disease duration. The use of such medications carries significant risk, including intestinal dysmotility and potential for addiction. However, the rates of narcotic use and misuse in patients with UC have not been studied extensively. Functional gastrointestinal disorders(FGID) are prevalent in patients with UC, and have been shown to increase the risk of narcotic use and misuse in patients with Crohn's disease. We hypothesized that patients with UC and a concurrent diagnosis of FGID would have increased rates of both opioid use and misuse in our patient cohort.AIM To evaluate the prevalence of chronic opioid use and misuse in UC.METHODS A retrospective chart review of UC patients seen at the University of Virginia Digestive Health Center was performed on all patients evaluated between 2006 and 2011. Patient demographics, medical, surgical, and medication histories were obtained from the electronic medical record. Concomitant diagnosis of FGID was also noted at the time. The electronic prescription monitoring program was accessed to obtain prescription opioid filling histories. Prescription opioid misuse was defined as opioid prescriptions filled from four or more prescribers and four or more different pharmacies in a 12-mo period.RESULTS A total of 497 patients with UC were included. Patients with UC and FGID were more likely to be female, but no other demographic variables were associated with FGID. Of the UC patients who had FGID, a greater proportion were found to be using opioids chronically(36% with FGID vs 9% without FGID, P < 0.0001)and were misusing prescription opioids(12.8% vs 1.3%, P < 0.001). Multivariate logistic regression demonstrated a significant association with FGID and chronic opioid use(OR = 4.50; 95%CI: 1.91-10.59) and opioid misuse(OR = 5.19; 95%CI1.04-25.76). Tobacco use(OR 2.53; 95%CI: 1.06-6.08) and anxiety(OR 3.17; 95%CI:1.08-9.26) were other variables associated with an increased risk of chronic narcotic use.CONCLUSION FGID was associated with a 4.5-fold increase in chronic opioid use and a 5-fold increased risk of opioid misuse in this patient cohort with UC.
基金Supported by Crohn’s and Colitis Foundation of America,Research Fellowship Award,No.CON125252(to Lopetuso LR)European Crohn’s and Colitis Organization Grant(to Scaldaferri F)Societa?Italiana di Gastroenterologia prize(to Scaldaferri F)
文摘AIM To explore the influence of Infliximab(IFX) on cancer progression in a murine model of colonic cancer associated to chronic colitis.METHODS AOM/DSS model was induced in C57BL/6 mice. Mice were injected with IFX(5 mg/kg) during each DSS cycle while control mice received saline. Body weight, occult blood test and stool consistency were measured to calculate the disease activity index(DAI). Mice were sacrificed at week 10 and colons were analyzed macroscopically and microscopically for number of cancers and degree of inflammation. MTT assay was performed on CT26 to evaluate the potential IFX role on metabolic activity and proliferation. Cells were incubated with TNF-α or IFX or TNF-α plus IFX, and cell vitality was evaluated after 6, 24 and 48 h. The same setting was used after pre-incubation with TNF-α for 24 h.RESULTS IFX significantly reduced DAI and body weight loss in mice compared with controls, preserving also colon length at sacrifice. Histological score was also reduced in treated mice. At macroscopic analysis, IFX treated mice showed a lower number of tumor lesions compared to controls. This was confirmed at microscopic analysis, although differences were not statistically significant. In vitro, IFX treated CT26 maintained similar proliferation ability at MTT test, both when exposed to IFX alone and when associated to TNF-α.CONCLUSION IFX did not increase colonic cancer risk in AOM-DSS model of cancer on chronic colitis nor influence directly the proliferation of murine colon cancer epithelial cells.
文摘Background The incidence of chronic ulcerative colitis (CUC) in China is remarkably increasing, while little information on surgical treatment has been reported. This study aimed to completely describe and analyze the clinical outcome of restorative proctocolectomy with ileal pouch-anal anastomosis (IPAA)for CUC in China. Methods Ninety-five consecutive patients, who suffered CUC and had surgical indications, were carefully selected. All patients underwent IPAA. Data on patient characteristics, surgical indications, surgical details, postoperative complications, functional outcome, and quality of life were collected. Results The mean patient age at the time of the operation was 32 years. Twenty-nine (31%) patients underwent an emergency operation, and 66 (69%) underwent elective procedures. Four patients with severe dysplasia underwent operations, but no carcinoma was histologically confirmed. A two-stage operation was performed in 87 (92%) patients, and a hand-sewn technique was applied in 88 (93%) patients. Sixteen patients (17.0%) experienced early complications, and there was a significant difference between the emergency surgery group and the elective group (31.0% vs. 10.6%, respectively; P 〈0.01). Five (5.3%) patients developed pouchitis as a late complication. The mean stool frequency after the operation was 4.6 (2-11) during the first 24 hours and 1.5 (0-4) overnight. According to the Kirwan grading scale, 87 (91.8%) patients showed satisfactory anal continence function. The quality of life improved significantly from a preoperative mean value of 0.28-0.61 before ileostomy closure to 0.78 after ileostomy closure (P 〈0.01) according to the Cleveland Global Quality of Life index. Conclusions IPAA is an effective and safe surgical procedure for patients with CUC in China. However, some characteristics, such as the low incidence of pouchitis, require further study.
基金This study was supported by National Science and Technology Major Project of China:No.2017ZX10202202-005-009.
文摘Interferon(IFN)is a multifaceted immunomodulator that is effective against many diseases,including chronic hepatitis B and chronic hepatitis C infection.IFN defends against viral infection,but may also cause various side effects,such as ulcerative colitis(UC).Herein,we present a case of UC triggered by pegylated interferon alpha-2b(PEG-IFN-α-2b)therapy in a patient with concurrent chronic hepatitis B(CHB)infection.The diagnosis was based on typical clinical symptoms,colonoscopy findings,colonic mucosal biopsy,and histopathology.Accordingly,treatment with mesalazine was initiated without stopping PEG-IFN-α-2b.Fortunately,UC relieved gradually without compromising the effects of treatment.Simultaneously,we conducted a literature review of previously published case reports on the side effect of UC in patients with underlying chronic hepatitis.Various reactions have been reported,including induction,exacerbation,and no change.This is the first report of UC triggered by PEG-IFN-α-2b in a CHB patient.We recommend that physicians pay attention to the rare side effect of UC during administration of PEG-IFN-α-2b.Mesalazine can relieve UC with sustained use of PEG-IFN-α-2b.
文摘BACKGROUND There is a growing evidence regarding an increased risk of inflammatory bowel disease(IBD)among patients with airway diseases.AIM To investigate the influence of chronic obstructive pulmonary disease(COPD)on the risk of IBD.METHODS A nationwide,population-based study was conducted using data from the National Health Insurance Service database.A total of 1303021 patients with COPD and 6515105 non-COPD controls were identified.The COPD group was divided into the severe and the mild COPD group according to diagnostic criteria.The risk of IBD in patients with COPD compared to controls was analyzed by Cox proportional hazard regression models.The cumulative incidences of IBD were compared between the groups.RESULTS The COPD group had higher incidences of IBD compared to non-COPD controls(incidence rate,9.98 vs 7.18 per 100000 person-years,P<0.001).The risk of IBD in the COPD group was increased by 1.38(adjusted hazard ratio(HR);95%CI:1.25-1.52).The incidence rate of IBD was higher in the severe COPD group than in the mild COPD group(12.39 vs 9.77 per 100000 person-year,P<0.001).The severity of COPD was associated with an increased risk of IBD(adjusted HR 1.70 in severe COPD,95%CI:1.27-2.21 and adjusted HR 1.35 in mild COPD,95%CI:1.22-1.49)CONCLUSION The incidences of IBD were significantly increased in COPD patients in South Korea and the risk of developing IBD also increased as the severity of COPD increased.
基金supported by the National Natural Science Foundation of China(21761142002 and 81770464)Ministry of Science and Technology of the People’s Republic of China(2018ZX09301043-003)+2 种基金Chinese Academy of Science(QYZDJSSW-SMC012,SAJC201606the West Light Foundation and Youth Innovation Promotion Association(2017432))Yunnan Provincial Science and Technology Department(2017FB038,2015BC005)
文摘Bacterial DNA(bacDNA) is frequently found in serum of patient with ulcerative colitis(UC) and Crohn's disease, even blood bacterial culture is negative. How bacDNA evades immune elimination and is translocated into blood remain unclear. Here, we showed that bacDNA avoids elimination and disables bacteriakilling function of antimicrobial peptide LL-37(Cramp in mice) by forming complex with LL-37, which is inducible after culture with bacteria or bacterial products. Elevated LL-37-bacDNA complex was found in plasma and lesions of patients with UC. LL-37-bacDNA promoted inflammation by inducing Th1, Th2 and Th17 differentiation and activating toll-like receptor-9(TLR9). The complex also increased paracellular permeability, which possibly combines its inflammatory effects to promote local damage and bacDNA translocation into blood. Cramp-bacDNA aggravated mouse colitis severity while interference with the complex ameliorated the disease. The study identifies that inflammatogenic bacDNA utilizes LL-37 as a vehicle for blood translocation and to evade immune elimination. Additionally, bacteria may make a milieu by releasing bacDNA to utilize and resist host antimicrobial peptides as a ‘trojan horse'.
文摘Inflammatory bowel disease(IBD)causes systemic vascular inflammation.The increased risk of venous as well as arterial thromboembolic phenomena in IBD is well established.More recently,a relationship between IBD and atherosclerotic cardiovascular disease(ASCVD)has been postulated.Systemic inflammatory diseases,such as rheumatoid arthritis and systemic lupus erythematosus,have well characterized cardiac pathologies and treatments that focus on prevention of disease associated ASCVD.The impact of chronic inflammation on ASCVD in IBD remains poorly characterized.This manuscript aims to review and summarize the current literature pertaining to IBD and ASCVD with respect to its pathophysiology and impact of medications in order to encourage further research that can improve understanding and help develop clinical recommendations for prevention and management of ASCVD in patients with IBD.