Influence of Detubularisation and Type of Intestinal Segment Used for Cystoplasty on Morphology of the Wall of Urinary Reservoir in Different Terms after Surgery-pilot Study

In general statistics of all malignant neoplasms bladder can-cer (BC) makes up some 4%, and it takes 8-th place in group ofoncological pathology frequency of occurrence [1-2]. Among nu-merous versions of urine derivation after radical cystectomypreference is shown for conti-nent methods with

Magnifying endoscopy for the diagnosis of specialized intestinal metaplasia in short-segment Barrett's esophagus

AIM:To determine whether magnified observation of short-segment Barrett’s esophagus(BE)is useful for the detection of specialized intestinal metaplasia(SIM).METHODS:Thirty patients with suspected short-segment BE underwent magnifying endoscopy up to×80.The magnified images were analyzed with respect to their pit-patterns,which were simultaneously classified into five epithelial types[Ⅰ(small round),Ⅱ(straight),Ⅲ(long oval),Ⅳ(tubular),Ⅴ(villous)]by Endo’s classification.Then,a 0.5%solution of methylene blue(MB)was sprayed over columnar mucosa.The patterns of the magnified image and MB staining were analyzed.Biopsies were obtained from the regions previously observed by magnifying endoscopy and MB chromoendoscopy.RESULTS:Three of five patients with a typeⅤ(villous)epithelial pattern had SIM,whereas 21 patients with a non-typeⅤepithelial patterns did not have SIM.The sensitivity,specificity,accuracy,positive predictive value,and negative predictive value of pit-patterns in detecting SIM were 100%,91.3%,92.3%,60%and100%,respectively(P=0.004).Three of the 12 patients with positive MB staining had SIM,whereas 14patients with negative MB staining did not have SIM.The sensitivity,specificity,accuracy,positive predictive value,and negative predictive value of MB staining in detecting SIM were 100%,60.9%,65.4%,25%and100%,respectively(P=0.085).The specificity and accuracy of pit-pattern evaluation were significantly superior compared with MB staining for detecting SIM by comparison with the exact McNemar’s test(P=0.0391).CONCLUSION:The magnified observation of a shortsegment BE according to the mucosal pattern and its classification can be predictive of SIM.

Mechanical intestinal obstruction due to isolated diffuse venous malformations in the gastrointestinal tract: A case report and review of literature

BACKGROUND Isolated gastrointestinal venous malformations(GIVMs)are extremely rare congenital developmental abnormalities of the venous vasculature.Because of their asymptomatic nature,the diagnosis is often quite challenging.However,as symptomatic GIVMs have nonspecific clinical manifestations,misdiagnosis is very common.Here,we report a case of isolated diffuse GIVMs inducing mechanical intestinal obstruction.A literature review was also conducted to summarize clinical features,diagnostic points,treatment selections and differential diagnosis in order that doctors may have a comprehensive understanding of this disease.CASE SUMMARY A 50-year-old man presented with recurrent painless gastrointestinal bleeding for two months and failure to pass flatus and defecate with nausea and vomiting for ten days.Digital rectal examination found bright red blood and soft nodular masses 3 cm above the anal verge.Computed tomography showed that part of the descending colon and rectosigmoid colon was thickened with phleboliths in the intestinal wall.Colonoscopy exhibited bluish and reddish multinodular submucosal masses and flat submucosal serpentine vessels.Endoscopic ultrasonography showed anechoic cystic spaces within intestinal wall.The lesions were initially thought to be isolated VMs involving part of the descending colon and rectosigmoid colon.Laparoscopic subtotal proctocolectomy,pullthrough transection and coloanal anastomosis and ileostomy were performed.Histopathology revealed intact mucosa and dilated,thin-walled blood vessels in the submucosa,muscularis,and serosa involving the entire colorectum.The patient recovered with complete symptomatic relief during the 52-mo follow-up period.CONCLUSION The diagnosis of isolated GIVMs is challenging.The information presented here is significant for the diagnosis and management of symptoms.

Segmental arterial mediolysis, reparative phase: An analysis and case report showing conversion to fibromuscular dysplasia with renal infarction

Segmental arterial mediolysis (SAM), an uncommon arteriopathy putatively caused by norepinephrine released by alpha-1 adrenergic agonists or some Beta-2 agonists capable of releasing norepinephrine from the peripheral sympathetic nervous system potentially can present ischemic and organ injury symptoms caused by sequelae created in its reparative phase in lieu of catastrophic hemorrhages announced in its injurious phase. The case documents this presentation—the patient presenting renal infarcts and ischemic lesions causing abdominal angina, hypertension and a nephrectomy event developing 10 years after prolonged ritodrine treatment for premature labor. This agent may have directly caused SAM or sensitized the patient to agonists causing SAM encountered at a latter date. A variety of lesions derived from injurious phase arterial injuries characterize reparative phase SAM. All were encountered in a hilar branch of the resected renal artery. These included side-by-side sequela aneurysms grossly forming a large fusiform aneurysm, granulation tissue filling adventitial medial tear spaces in which a dissecting hematomas developed, medial muscle loss centered to the outer media repaired with fibrous tissue, arterial stenosis created by reparative intimal plaques, and arterial thrombo-embolism. These lesions were mirrored in accompanying radiologic studies. The accompanying renal vein exhibited changes consistent with repair of the spastic venous angiopathy that often accompanies abdominal SAM. This angiopathy, putatively induced by Endothelin-1, suggested that this agent played a role in the genesis of the arterial lesions. Angiographic resolution of non-treated sequelae occurred in 5 months either spontaneously or due to treatment with bosentem. Conclusions: The histologic and angiographic changes demonstrate that the clinical onset of reparative SAM may be significantly delayed to produce ischemic lesions, renal infarction and in this case report, medial fibromuscular dysplasia in the hilar branch of the renal artery.

燕麦饲喂条件下断奶马驹十二指肠、空肠和回肠内容物细菌丰度的比较研究

试验旨在探究燕麦饲喂条件下断奶马驹十二指肠、空肠和回肠内容物细菌丰度的变化,为通过营养方式调节肠道微生物,增强马驹肠道健康提供参考依据。选择出生日期和断奶日期相近、体重为(112.36±7.50)kg的哈萨克马公驹5匹,在相同的饲养管理和日粮营养水平条件下,进行为期60 d的饲养。于试验最后1 d进行屠宰,分别采集马驹十二指肠、空肠和回肠的内容物,利用16S r DNA高通量测序技术检测各肠段内容物细菌多样性。结果表明:(1)十二指肠、空肠和回肠内容物菌群中共有OTU为1389个,特有的OTU数量分别为360、318和249个,各肠段内容物菌群的Chao1、ACE、Shannon和Simpson指数无差异显著性(P>0.05);(2)马驹各肠段内容物10大优势菌门分别为厚壁菌门(Firmicutes)、变形菌门(Proteobacteria)、拟杆菌门(Bacteroidetes)、螺旋菌门(Spirochaetes)、放线菌门(Actinobacteria)、疣微菌门(Verrucomicrobia)、纤维杆菌门(Fibrobacteres)、软壁菌门(Tenericutes)、Melainabacteria和蓝藻(Cyanobacteria);10大优势菌科为毛螺旋菌科(Lachnospiraceae)、肠杆菌科(Enterobacteriaceae)、链球菌科(Streptococcaceae)、未经确认的梭菌科(unidentified_Clostridiales)、瘤胃球菌科(Ruminococcaceae)、毛螺菌科(Lachnospiraceae)、普雷沃氏菌科(Prevotellaceae)、巴斯德氏菌科(Pasteurellaceae)、理研菌科(Rikenellaceae)和明串珠菌科(Leuconostocaceae);10大优势菌属为乳杆菌属(Lactobacillus)、未经确认的肠杆菌属(unidentified_Enterobacteriaceae)、链球菌属(Streptococcus)、乳球菌属(Lactococcus)、未经确认的梭菌属(unidentified_Clostridiales)、八叠球菌属(Sarcina)、柠檬酸杆菌属(Citrobacter)、放线杆菌属(Actinobacillus)、魏斯氏菌属(Weissella)和未经确认的瘤胃球菌属(unidentified_Ruminococcaceae)。(3)除空肠内容物中普雷沃氏菌科高于回肠135.96%外(P<0.05),其余优势菌在门、科、属水平均无差异显著性(P>0.05)。(4)LEFSe分析中,十二指肠、空肠和回肠肠道内容物菌群之间存在显著差异的菌有11种。其中,十二指肠内容物中显著上调的菌8种,空肠内容物显著上调的菌1种,回肠内容物显著上调的菌2种;功能预测出25种功能。综上所述,燕麦饲喂条件下,断奶马驹十二指肠、空肠和回肠内容物菌群多样性指数没有显著性变化;在细菌种类和相对丰度方面,排名在前的10大优势菌种类一致,但十二指肠内容物与空肠和回肠相比,存在较多的差异显著菌,且细菌功能具有区域特异性,导致各肠段微生物的功能不尽相同。

基于直方图均衡残差网络(PE-ResNet)的肠息肉分割研究

结肠镜检查是结直肠癌早期病变筛查的重要技术手段,肠息肉的准确分割有助于提高筛查的准确性。早期病变的筛查对于预防肠癌具有重要意义,而肠息肉分割是其中的一个重要研究方向。虽然基于深度学习的肠息肉分割已取得良好的结果,但肠镜图像的色彩差异仍是影响分割性能的主要因素之一。在ResNet网络的基础上,提出一种基于直方图均衡的改进型网络PE-ResNet,用于解决肠息肉分割中的色彩差异问题。在ClinicDB等5个公开的息肉分割数据集上的实验结果表明,PE-ResNet在肠息肉分割任务中,能够提升性能。

An emerging role of vitamin D_(3) in amino acid absorption in different intestinal segments of on-growing grass carp(Ctenopharyngodon idella)

Vitamin D_(3)(VD_(3)),an essential nutrient for animals,has been demonstrated to stimulate the uptake of certain amino acids.However,the role of VD_(3) in the intestine,the primary site for digestion and absorption of nutrients,remains poorly characterized.Here,the grass carp(Ctenopharyngodon idella)was studied to assess the influence of different doses of VD_(3)(15.2,364.3,782.5,1,167.9,1,573.8,and 1,980.1 IU/kg)on growth performance,intestinal morphology,digestive absorption,amino acid transport,and potential signaling molecule levels in a feeding experiment.As a result,dietary VD_(3) improved growth performance,intestinal structure,and digestive and brush border enzyme activities.Additionally,most intestinal free amino acids and their transporters were upregulated after VD_(3) intake,except for Ala,Lys,Asp,Leu,solute carrier(SLC)7A7,SLC1A5,and SLC1A3 mRNA in different segments,Leu and SLC6A14 mRNA in the proximal intestine,and SLC7A5 mRNA in the mid and distal intestine.In the crucial target of rapamycin(TOR)signal pathway of amino acid transport,the gene and protein expression of TOR,S6 kinase 1,and activating transcription factor 4 were elevated,whereas 4E-binding protein 1 was decreased,further suggesting an advanced amino acid absorption capacity in the fish due to VD_(3) supplementation.Based on percentage weight gain,feed efficiency,and trypsin activity,the VD_(3) requirements of on-growing grass carp were estimated to be 968.33,1,005.00,and 1,166.67 IU/kg,respectively.Our findings provide novel recommendations for VD_(3) supplementation to promote digestion and absorption capacities of fish,contributing to the overall productivity of aquaculture.

分段式肠内营养联合消化液回输改善重症肠瘘病人营养状况的护理研究

目的:研究分段式肠内营养联合消化液回输对于改善重症肠瘘病人的营养状况效果,探讨营养支持方式对重症肠瘘预后的影响,为重症肠瘘病人提供护理参考。方法:选择2023年2月~2023年8月东部战区总医院普通外科重症监护病房收治的96例并发多个瘘的重症肠瘘病人。根据营养支持方式分为干预组(n=47)和对照组(n=49),干预组采用分段式肠内营养联合消化液回输,对照组采用分段式肠内营养。在肠内营养干预后14 d收集指标比较两组差异,营养状况指标包括BMI、血清白蛋白水平、总蛋白水平、血红蛋白水平,炎症指标包括血清C反应蛋白(CRP)、白介素-6(IL-6),肠内营养不耐受症状发生率,以及ICU总住院时间、总住院费用等预后相关指标。结果:干预后14 d干预组血清总蛋白为(71.55±7.00)g/L、血红蛋白为(106.64±15.59)g/L,显著高于对照组(P<0.05);干预组BMI为(21.83±4.44)kg/m^(2),对照组为(19.64±3.16)kg/m^(2),差异有统计学意义(P<0.05);炎症指标方面,干预组CRP水平为(35.71±27.77)mg/L,对照组为(56.78±51.22)mg/L,差异有统计学意义(P<0.05);干预组IL-6水平为(30.20±24.47)pg/mL,对照组为(76.18±54.36)pg/mL,差异有统计学意义(P<0.05)。结论:分段式肠内营养联合消化液回输,有利于改善病人的营养状况、减轻炎症反应、降低肠内营养不耐受发生率、减少总住院时间。

小鼠不同肠道段内容物和粪便中微生物的宏基因组测序和比较分析

随着二代测序技术的迅速发展，从宏基因组角度了解环境微生物成为可能。目前，动物肠道微生物研究大多以粪便作为实验样品，对肠道内部微生物情况了解甚少。研究以小鼠为模型，分别对十二指肠、空回肠、盲肠、结肠4个部分内容物进行了宏基因组测序和分析。结果显示，（1）在门水平上，十二指肠比其他肠段厚壁菌门减少、变形菌门增多；（2）在属水平上，大肠的优势菌属为螺杆菌、真细菌等，小肠优势菌属为链球菌、大肠杆菌、梭菌、肠球菌等，而且粪便与大肠优势菌分布趋势类似；（3）大肠和小肠肠道微生物相似度为0．62～0．77，粪便与各肠段微生物相似度为0．7～o．9；（4）粪便和肠道内容物细菌功能差异同其生理功能有一定关联。研究表明，小肠内容物与大肠内容物和粪便中微生物有明显差异，尽营粪便微生物与大肠内容物微生物类似。这一结果暗示着粪便微生物不能完全代表动物宿主肠道微生物的真实情况。

多发肠瘘患者分段式肠内营养联合消化液回输的护理

目的探讨多发肠瘘患者分段式肠内营养联合消化液回输的护理方法。方法回顾性分析2011年1月至2012年12月南京军区南京总医院普通外科研究所重症监护室(intensive care unit,ICU)内23例多发肠瘘患者实施分段式肠内营养联合消化液回输的管理方法。分段式肠内营养包括制剂选择及配制、使用时机和途径、输注原则及"六度"管理、管道的管理、营养代谢的监测,以及消化液回输管理、瘘口的管理、功能锻炼等措施。结果 23例患者在实施分段式肠内营养期间,通过积极的消化液回输管理和功能锻炼,以保证营养物质充分消化吸收,全部达到理想效果,为患者后续治疗提供保障。结论分段式肠内营养联合消化液回输的方法是多发肠瘘患者实施肠内营养的重要手段,良好的管理可有效预防相关并发症的发生,为一次性确定手术治疗提供保障。

肠道与微生物相互作用体外研究模型进展与应用

肠道微生物对机体的营养代谢、能量代谢和免疫功能等具有十分重要的作用,而微生物黏附、定植以及同宿主肠上皮的相互作用在这些过程中至关重要,因而深入理解微生物和肠道之间的相互作用是阐明微生物如何参与机体营养、代谢和免疫过程的关键。本文综述了研究微生物与肠道相互作用的主要体外模型,以及应用这些模型取得的研究进展。

藏猪肠道不同部位CAT1、EAAC1和PepT1 mRNA的特异性分布

选取体重接近且健康的28日龄哺乳仔藏猪6头,屠宰后分离肠道(十二指肠、空肠前段、空肠后段和回肠),运用RFQ-PCR技术对藏猪不同肠段小肽转运载体PepT1、酸性氨基酸转运载体EAAC1和碱性氨基酸转运载体CAT1 mRNA的组织分布进行研究。结果表明:空肠后段PepT1 mRNA表达丰度最高,而回肠的表达量最低;从小肠近端到远端EAAC1 mRNA的表达丰度在小肠的表达呈升高趋势,即回肠表达最高,空肠后段次之,但与十二指肠、空肠前段差异不显著(P>0.05);CAT1 mRNA不同肠段表达格局与EAAC1相似,回肠中CAT1 mRNA表达丰度最高,显著高于十二指肠(P<0.05),但空肠前、后段的差异不显著(P>0.05)。

四川白鹅不同肠段菌群多样性比较研究

试验利用Illimina MiSeq高通量测序对70日龄四川白鹅十二指肠、空肠、回肠和盲肠内容物进行微生物多样性分析。结果显示:①4个肠段微生物群落的α多样性(菌群丰度上)存在显著差异(P<0.05);②4个肠段的菌群结构在6个菌门和13个菌属的相对丰度存在显著差异(P<0.05);③盲肠微生物在7个菌属(脱硫弧菌属、拟杆菌属、拟杆菌属、相炭疽杆菌属、瘤胃球菌属、韦荣球菌属和Butycricimonas菌属)的相对丰度都显著高于其他3个肠段(P<0.05),但是空肠的链球菌属和回肠的SMB53菌属的相对丰度均显著高于其他3个肠段(P<0.05)。结果提示:鹅不同肠段的菌群组成存在显著差异,回肠和空肠微生物都参与粗纤维的消化,盲肠消化粗纤维的能力要强于其他3个肠段。

去粘膜游离小肠段内自体脾组织移植实验研究和临床应用

本实验将犬自体脾组织移植于游离空肠段内,6月后处死取出移植脾组织进行大体形态学:光镜和电镜观察,结果显示:移植脾组织存活良好,再生明显,其重量为原移植重量的129.6%,组织形态学及超微结构与对照组无明显差异,经临床应用证明此方法是自体脾移植的理想方法。

用原位结扎肠段灌注法研究有机锰在肉仔鸡小肠中的吸收特点

用原位结扎肠段灌注法研究肉仔鸡十二指肠、空肠和回肠对有机锰和无机锰的吸收特点的差异。结果表明,在肉仔鸡原位结扎灌注肠段中,回肠是肉仔鸡小肠吸收锰的主要部位;螯合的有机锰在肉仔鸡小肠中的吸收率明显高于无机形态的锰;作为配体而言,蛋氨酸比甘氨酸更有利于促进锰的吸收。

不同肠段中氨基酸螯合锌吸收特点的研究

用 50日龄Wistar纯系雄性大鼠 ,以体内原位结扎肠段灌注技术结合放射性同位素示踪技术 ,通过与氯化锌比较 ,研究了十二指肠和空肠对氨基酸螯合锌 (以赖氨酸螯合锌和蛋氨酸螯合锌为代表 )的吸收特点。试验中观察了向结扎肠段灌注含不同形态锌的灌注液后 ,不同时间 (5 ,1 5 ,30 ,60 ,90 ,1 2 0min)血液中6 5Zn比放射性的动态变化 ,1 2 0min (试验结束 )时结扎肠段6 5Zn的消失率 ,不同组织器官中6 5Zn的比放射性的变化。试验结果表明 ,和空肠相比 ,十二指肠对 3种锌源的吸收率高 ;和氯化锌相比 ,十二指肠和空肠对

旋覆代赭汤不同煎煮工艺对胃肠道影响的比较研究

目的 通过考察旋覆代赭汤对小鼠胃排空、小肠推进和离体肠段张力的影响,比较不同煎煮工艺在作用上的一致性和差异性。方法 分别采用正常小鼠和阿托品造模小鼠,用营养性半固体糊加活性炭法观察旋覆代赭汤传统煎（CJ）、机器常压煎（JCJ）、机器高压煎（JGJ）3种煎煮方法对小鼠胃内容物残留率和小肠推进率的影响;分别采用正常大鼠和阿托品所致大鼠肠段张力实验,考察CJ、JCJ、JGJ 3种煎煮方法对大鼠十二指肠段张力的作用。结果 旋覆代赭汤3种煎煮方法对正常小鼠胃内残留率作用不明显,而CJ小剂量、JCJ及JGJ 2个剂量组均能显著增强正常小肠推进率（P〈0.05～0.01）,尤以JCJ大剂量组更为明显;但在阿托品抑制作用的基础上,CJ小剂量、JCJ和JGJ大剂量组能显著减少胃内残留率（P〈0.05～0.01）,CJ、JCJ和JGJ各剂量组显著增强小肠推进率（P〈0.05～0.01）,尤以CJ各剂量组和JGJ大剂量组更为明显;3种煎煮方法均能提高大鼠肠段张力增强率,在正常情况下以JGJ组更为显著（P〈0.01）,在受阿托品抑制作用下,JCJ和JGJ组与更为显著（P〈0.05～0.01）,但3种煎煮方法比较未见显著差异（P〉0.05）。结论 旋覆代赭汤具有协调胃肠功能的作用,JCJ和JGJ的作用相近或略优于CJ法,为目前临床代煎采用的JCJ法和JGJ法提供实验依据。

猪肠道钠氢交换载体(NHE3)mRNA表达的肠段特异性和发育性变化

旨在探讨猪肠道钠氢交换载体(NHE3)mRNA表达的肠段特异性和发育模式,为NHE在养猪生产中的应用提供理论依据。选取遗传背景相同的1、7、26、30、60、90和150 d蓝塘和长白公猪各5头,测体质量后屠宰,取十二指肠、空肠、回肠和结肠组织样品;以18S rRNA为内标基因,用实时荧光定量PCR法检测NHE3 mRNA在60 d长白猪表达的肠段特异性及其在蓝塘和长白猪肠道表达的发育模式。结果显示:长白猪肠道NHE3 mRNA的表达丰度为结肠、十二指肠、空肠和回肠依次降低,且结肠显著高于空肠和回肠(P<0.05)。不同猪种NHE3mRNA在十二指肠和空肠的表达模式相似;蓝塘和长白猪NHE3 mRNA的表达丰度分别在7和30 d(十二指肠)、7和26 d(空肠)达最高水平(P<0.05)。不同猪种结肠NHE3 mRNA的表达模式不同,分别与其在十二指肠和空肠的发育呈现不同的模式;蓝塘猪结肠NHE3 mRNA的表达丰度在26、90和150 d时显著低于长白猪(P<0.05)。以上结果说明,猪肠道NHE3 mRNA的表达受到发育阶段、品种和肠段的调控,且在十二指肠和空肠间具有品种稳定性。

野生树鼩与人工饲养树鼩消化道不同部位微生物组成的比较研究

目的以树鼩为研究模型,探讨野生树鼩与人工繁育树鼩不同肠段的菌群组成。方法分别收集3只健康野生及人工繁育树鼩七个胃肠段样本,提取细菌总DNA,采用高通量测序技术对16S rRNA基因的V3-V4高变区测序,分析比较菌群结构及多样性。结果不同肠段Alpha指数多样性分析显示野生组与人工繁育组树鼩在盲肠和胃Shannon指数存在显著差异(P<0.05)。野生组与人工繁育组各肠段微生物组成存在较大差异,门水平上,野生组直肠、结肠、盲肠及胃四个部位中Firmicutes菌门的平均占比显著高于人工繁育组(P<0.05);人工繁育组直肠、结肠、盲肠及回肠内Spirochaetes菌门的平均占比显著高于野生组(P<0.05);野生组直肠内Bacteroidetes菌门的平均占比显著高于人工繁育组(P<0.05);属水平上,野生组明显高于人工繁育组的主要菌属为:回肠、空肠和胃内的Weissella菌属,直肠内的Bacteroides菌属以及回肠段内的Lactococcus菌属;人工繁育组明显高于野生组的主要菌属为:直肠、结肠、盲肠及回肠内的Brachyspira属,盲肠和胃内的Prevotella9菌属,盲肠和空肠内的Streptococcus属以及回肠中的Lactobacillus菌属。不同肠段菌群功能基因预测显示两组共有5个解剖部位17个基因类别之间的差异有统计学意义(P<0.05)。结论野生树鼩与人工繁育树鼩各肠段菌群组成差异较大;各肠段细菌功能差异较大,且与其生理功能、饮食结构有一定关联;在肠道菌群研究中,应充分考虑粪便样品微生物的组成是否能够完全代表肠道微生物的组成。

感染后肠易激综合征小鼠肠黏膜和血中细胞因子的表达变化

【目的】观察感染后肠易激综合征小鼠不同肠段和外周血中IFN-γ、IL-17、IL-10的表达及以上细胞因子的改变对肠道动力和内脏敏感性的影响。【方法】40只雌性C57BL\6小鼠随机分为PI-IBS组和对照组,每组20只。PI-IBS组小鼠用0.2 m L含350条旋毛虫幼虫的生理盐水悬液灌胃,对照组给予等体积的生理盐水。分别于感染后第2、4、8周,取末端回肠和近端结肠进行组织病理学检测。于感染后第8周通过检测小鼠腹壁撤退反射(AWR)评分评估小鼠对结直肠扩张的内脏敏感性变化,检测肠道传输时间(ITT)和粪便含水百分数评估小鼠肠道动力的改变;采用ELISA测定十二指肠、空肠、回肠、结肠和外周血中IFN-γ、IL-17和IL-10水平的改变。【结果】感染后第8周,PI-IBS小鼠肠道急性炎症完全恢复至正常;在结直肠扩张容量为0.35和0.5 m L时,模型组AWR评分均显著高于对照组(P<0.01);PI-IBS小鼠肠道传输时间缩短、每2 h粪便含水百分数增高,较正常对照组具有显著性差异(P<0.01);ELISA结果显示:与对照组相比,PI-IBS组小鼠的IFN-γ和IL-17水平在十二指肠、回肠和外周血中表达升高(P<0.05);而IL-10水平在空肠、回肠、结肠以及外周血中的表达显著降低(P<0.05)。【结论】感染后肠易激综合征小鼠不同肠段组织中细胞因子表达水平存在差异,外周血与部分肠段组织中细胞因子的表达变化呈同步化改变。细胞因子的改变可能是PI-IBS内脏敏感性增高和肠道运动功能紊乱的机制之一。