2.Causal Association Between Immune Cells and Cervical Cancer:A Two-Sample Mendelian Randomization Study
Jingting LIU ; Yawei ZHOU ; Lingguo KONG ; Qiandan WANG ; Tianxiong SU ; Jianying PEI ; Yan LI
Cancer Research on Prevention and Treatment 2024;51(9):772-778
Objective To investigate potential causative associations between immunophenotype traits and cervical cancer by using two-sample Mendelian randomization(MR)analysis.Methods The genetic instrumental variables(IVs)of 731 immunophenotypes of peripheral blood were obtained from the GWAS Catalog database.The GWAS summary data of cervical cancer were obtained from FinnGen database.The inverse-variance weighted(IVW),weighted mode,weighted median,and MR Egger methods were used for evaluations.The sensitivity analysis and reverse Mendelian randomization analysis were conducted to eliminate bias and reverse causality.The MR Steiger directionality test was further used to ascertain the reverse causal relationship between immune cells and cervical cancer.Results A total of 71 immune cell subtypes associated with cervical cancer were identified,of which 31 had a strong association.The majority of the B cell panel was protective factors for cervical cancer.B-cell activating factor receptor(BAFF-R)was the most frequently expressed molecule in this analysis.It is expressed on several B cell subtypes.The CD20 on IgD+CD38+B cell(OR=1.887,95%CI:1.078-3.306,P=0.026)is the risk factor for cervical cancer.In cDC panels,the CD123 expression on plasmacytoid dendritic cell(OR=2.48,95%CI:1.229-5.003,P=0.011),CD123 expression on CD62L+plasmacytoid dendritic cell(OR=2.5,95%CI:1.231-5.077,P=0.011),CD80 expression on plasmacytoid dendritic cell(OR=2.62,95%CI:1.244-5.515,P=0.011),and CD80 expression on CD62L+plasmacytoid dendritic cell(OR=2.641,95%CI:1.246-5.596,P=0.011)were positively associated with the incidence of cervical cancer.All gynecological cancers in this study have no statistically significant effect on immune cells,according to reverse MR analysis.Conclusion This study emphasized the genetically predicted causality between immune cells and cervical cancer.In clinical practice,it is important to pay attention to the screening of peripheral blood immune cells for patients with cervical cancer.
3.Clinical characteristics and perinatal outcomes of severe fetal growth restriction preceding preeclampsia
Xia XU ; Yanhong XU ; Yizheng ZU ; Guiying WANG ; Jianying YAN
Chinese Journal of Perinatal Medicine 2024;27(9):722-728
Objective:To investigate the clinical characteristics and perinatal outcomes of preeclampsia (PE) with severe fetal growth restriction (FGR) as the initial symptom.Methods:This retrospective cohort study included cases of singleton live births with PE and severe FGR delivered at Fujian Maternity and Child Health Hospital from January 2012 to December 2022. The cases were divided into two groups based on the sequence of severe FGR and hypertension onset: the severe FGR-first group and the hypertension-first group. General data, clinical characteristics, pregnancy complications, and neonatal outcomes were analyzed between the two groups. Statistical analyses were performed using t-tests, Mann-Whitney U tests, and Chi-square tests. Multivariate linear regression or logistic regression analyses were used to adjust for the effects of confounding factors on perinatal outcomes. Results:(1) A total of 307 cases were included in the study, with 194 cases (63.2%) in the severe FGR-first group and 113 cases (36.8%) in the hypertension-first group. Compared to the hypertension-first group, the severe FGR-first group had a higher proportion of severe FGR before 32 weeks, later gestational age at PE diagnosis, lower proportion of early-onset PE, greater gestational age at pregnancy termination, and shorter interval from PE diagnosis to pregnancy termination [40.7% (46/113) vs. 59.3% (115/194), χ2=9.87; (32.8±5.1) weeks vs. (35.6±3.4) weeks, t=5.12; 52.2% (59/113) vs. 25.8% (50/194), χ2=21.80; (34.7±3.1) weeks vs. (36.0±3.2) weeks, t=3.43; all P<0.01]. There was no statistically significant difference in the interval between the diagnosis of severe FGR and hypertension between the two groups. (2) Compared to the hypertension-first group, the severe FGR-first group had a lower preterm birth rate and a higher incidence of premature rupture of membranes [69.0% (78/113) vs. 46.9% (91/194), χ2=14.12; 9.7% (11/113) vs. 19.1% (37/194), χ2=4.72; both P<0.05]. After adjusting for differences in gestational age at termination of pregnancy using multivariate logistic regression analysis, the results showed no statistically significant differences in the incidence of pregnancy complications between the two groups. (3) Compared with the hypertension-first group, the severe FGR-first group had higher neonatal birth weight [(1 757±605) g vs. (2 067±684) g, t=4.12], longer birth length [(41.7±4.3) cm vs. (43.4±4.6) cm, t=3.10], and heavier placentas [(399±158) g v s. (486±147) g, t=2.36]. The rates of cesarean section, severe small for gestational age, and low birth weight were lower [85.8% (97/113) vs. 68.6% (133/194), χ2=11.35; 65.5% (74/113) vs. 49.5% (96/194), χ2=7.40; 87.6% (99/113) vs. 69.6% (135/194), χ2=12.80; all P<0.05]. There were no statistically significant differences in the 1-minute Apgar scores and NICU admission rates between the two groups. After adjusting for differences in gestational age at termination of pregnancy using multivariate regression analysis, it was found that compared with the hypertension-first group, the severe FGR-first group had heavier neonates and a lower risk of cesarean section [ OR (95% CI) were 80.18 (0.95-159.42) and 0.51 (0.26-0.99), both P<0.05]. Conclusions:Pregnant women with severe FGR preceding PE have a later onset of PE and relatively better perinatal outcomes compared to those with hypertension preceding PE. It is necessary to strengthen the monitoring of blood pressure fluctuations in pregnant women with severe FGR preceding PE and fetal growth in pregnant women with hypertension preceding PE.
4.Factors influencing success of external cephalic version and their clinical significance
Lianghui ZHENG ; Huale ZHANG ; Zhaodong LIU ; Qiuping LIAO ; Lichun CHEN ; Rongxin CHEN ; Jianying YAN
Chinese Journal of Perinatal Medicine 2023;26(1):11-19
Objective:To analyze the factors influencing the success rate of external cephalic version (ECV) and to create a preoperative scoring scale for stratified management of pregnant women who were preparing for ECV.Methods:This prospective study was conducted on singleton pregnant women who underwent ECV without anesthesia in Fujian Maternity and Child Health Hospital from January 1, 2017, to December 31, 2019. Univariate (two independent samples t-test, Mann-Whitney U test, and Chi-square test) and multivariate logistic regression were used to screen the clinical characteristics affecting the success of ECV, and receiver operating characteristic (ROC) curve was used to determine the cut-off value and convert quantitative variables into dichotomous variables. The independent variables were scored according to the regression coefficient in multivariate logistic regression analysis, and then a preoperative scoring scale was created. The ROC curve was used to calculate the cut-off value for the scoring scale. The subjects were divided into low and high score groups according to the cut-off value. The area under the ROC curve was used for evaluating the effectiveness of the scale in predicting the success of ECV. The success rate of ECV, difficulty of the operation and mode of delivery were compared between the two groups. Results:A total of 1 338 pregnant women met the inclusion criteria during the study period. After the exclusion of 885 women, 165 refused ECV in favor of direct cesarean section, 27 spontaneously converted to cephalic position before ECV, 261 who voluntarily accepted ECV were finally enrolled. ECV succeeded in 202 cases and failed in 59. (1) Favorable factors for ECV without anesthesia were the distance between the fetal breech and ischial spine <-3.5 cm ( OR=0.177, 95% CI: 0.071-0.438, P=0.009), the sum of the fundal height and the station of the fetal breech based on the ischial spine <30.25 cm ( OR=0.225, 95% CI: 0.094-0.537, P=0.001), amniotic fluid index ≥12 cm ( OR=0.399, 95% CI: 0.164-0.969, P=0.042), the surgeon's ability to hold the fetal head or breech with one hand ( OR=0.241, 95% CI: 0.098-0.589, P=0.002; OR=0.219, 95% CI: 0.087-0.546, P=0.001), and the fetal head located on the right or left upper abdomen of the mother ( OR=0.184, 95% CI: 0.059-0.568, P=0.003; OR=0.253, 95% CI: 0.084-0.760, P=0.014). (2) The area under the ROC curve of the preoperative score for predicting the success of ECV was 0.881 (95% CI: 0.821-0.941) and the cut-off value was 5.5. The subjects were divided into low (0-5 scores) and high (6-11 scores) score groups and the area under the ROC curve for predicting the success of ECV by grouping was 0.843 (95% CI: 0.774-0.912). Compared with the low score group, the high score group had a shorter ECV duration [2.0 min (0.5-10.0 min) vs 10.0 min (0.9-25.8 min), Z=-6.83, P<0.001], less attempts [1.0 times (1.0-4.0 times) vs 3.0 times (1.0-5.0 times), Z=-8.41, P<0.001], higher success rate [92.7% (190/205) vs 21.4% (12/56), χ2=127.64, P<0.001], higher rate of vaginal birth [75.4% (147/195) vs 18.5% (10/54)] and lower cesarean section rate [24.6% (48/195) vs 81.5% (44/54)] ( χ2=58.70, P<0.001). Conclusions:Preoperative scoring based on the factors influencing the success rate of ECV (the distance between the fetal breech and ischial spine, the sum of the fundal height and the station of the fetal breech based on the ischial spine <30.25 cm, amniotic fluid index ≥12 cm, the surgeon's ability to hold the fetal head or breech with one hand, and the fetal head locating on the right or left upper abdomen of the mother) is conducive to the individualized evaluation of the difficulty and the success rate of ECV as well as the success rate of vaginal delivery after ECV, which can provide a reference for clinical stratified management of ECV patients.
5.Effect of Huashi Runzao Prescription on Primary Sjögren's Syndrome
Zihua WU ; Ziwei HUANG ; Jiaqi CHEN ; Qian HE ; Jianying YANG ; Yan ZHANG ; Jiahe LIAO ; Xinbo YU ; Jing LUO ; Qingwen TAO
Chinese Journal of Experimental Traditional Medical Formulae 2023;29(8):45-51
ObjectiveTo observe the efficacy and safety of Huashi Runzao prescription for patients with primary Sjögren's syndrome (pSS) of combined dryness and dampness pattern. MethodA total of 105 eligible patients were randomized into the experimental group (65 cases) and control group (40 cases), and they were respectively treated with Huashi Runzao prescription and hydroxychloroquine for 12 weeks. Visual Analogue Scale (VAS) was employed to assess the symptoms. The symptoms of dryness, fatigue, and pain, European League Against Rheumatism (EULAR) Sjögren's Syndrome Patient Reported Index (ESSPRI), EULAR Sjögren's syndrome disease activity index (ESSDAI), and immune inflammatory indicators before and after treatment were compared between the two groups, and adverse reactions were observed. ResultAfter treatment, the ESSPRI score was lower than that before treatment in the experimental groups (P<0.01) and was lower in the experimental group than in the control group (P<0.05). The VAS scores of dry mouth, dry eyes, overall dryness, fatigue, and pain in the experimental group decreased compared with those before treatment (P<0.01), and the experimental group had lower VAS scores of dry mouth and overall dryness than the control group (P<0.01). After treatment, the ESSDAI score of both groups decreased compared with that before treatment (P<0.05, P<0.01), but there was no significant difference between the groups. After treatment, the level of immunoglobulin M (IgM) decreased (P<0.01) and the level of complement C3 increased (P<0.01) in the experimental group, while the level of complement C3 decreased in the control group (P<0.05). There was no significant difference in the laboratory indexes between groups. During the treatment, stomachache occurred to one case in the experimental group, which was alleviated after the treatment, and no adverse reaction was observed in the control group. According to the chi-square test, the occurrence of adverse reactions was insignificantly different between the two groups. ConclusionHuashi Runzao prescription can alleviate the symptoms of dryness, fatigue, and pain, and reduce disease activity without associated side effects in pSS patients with combined dampness and dryness pattern.
6.Characteristics of Tongue Manifestations and Syndromes of Patients with Primary Sjögren's Syndrome of Different Time
Yan ZHANG ; Jianying YANG ; Lining ZHANG ; Zihua WU ; Qi HU ; Ziwei HUANG ; Jiaqi CHEN ; Xinbo YU ; Jing LUO ; Qingwen TAO
Chinese Journal of Experimental Traditional Medical Formulae 2023;29(8):52-58
ObjectiveTo explore the characteristics of tongue manifestations and traditional Chinese medicine (TCM) syndromes in patients with primary Sjogren's syndrome (pSS) of different time. MethodpSS patients who visited TCM Department of Rheumatism in China-Japan Friendship Hospital from December 2018 to October 2021 were included and grouped according to the disease courses (short<5 years, medium 5-10 years, long > 10 years). Chi-square test was used for comparison between three groups and Bonferroni method for multiple comparisons. In the pairwise comparison, P<0.017 indicated significant difference. Chi-square test was performed on the syndrome and specific tongue manifestations with inter-group differences to analyze the trend of tongue manifestations and TCM syndromes over time (interval: two years). ResultA total of 193 pSS patients were enrolled, with 85 (44.0%) of short disease course, 69 (35.8%) of medium disease course, and 39 (20.2%) of long disease course. The common tongue manifestations were crimson tongue, fissured tongue, thin tongue, lack of fluid, and dry coating, which showed no significant difference among the three groups. Higher proportion of patients with light red tongue was observed in the group with short disease course than in group with medium disease course (χ2=6.407, P<0.017). Higher proportions of patients with thick coating (χ2=6.784, P<0.017) and phlegm-dampness syndrome (χ2=11.545, P<0.017) and lower proportion of patients with Qi deficiency syndrome (χ2=12.706, P<0.017) were found in the group with short disease course than in the group with long disease course. Patients with medium (χ2=6.358, P<0.017) and long (χ2=8.279, P<0.017) disease course tended to have exfoliated coating compared with those with short disease course, and the proportion of patients with exfoliated coating rose and the proportion of patients with thick greasy coating decreased over time (Ptrend<0.05). In addition, the proportion of patients with phlegm-dampness syndrome decreased and that with Qi deficiency syndrome increased over time (Ptrend<0.05). ConclusionIn the early stage, patients with pSS often show both dryness and dampness, as manifested by the thick greasy coating and phlegm-dampness syndrome. In the medium and late stage, patients often have Qi-Yin deficiency, as evidenced by exfoliated coating and Qi deficiency. In the clinical practice, medicines should be prescribed based on tongue manifestations and TCM syndrome of patients.
7.Clinical Characteristics of Geographic Tongue in Patients with Primary Sjögren's Syndrome
Jiahe LIAO ; Lining ZHANG ; Yan ZHANG ; Jianying YANG ; Ziwei HUANG ; Zihua WU ; Jing LUO ; Qingwen TAO
Chinese Journal of Experimental Traditional Medical Formulae 2023;29(8):59-65
ObjectiveTo analyze the clinical characteristics of geographic tongue in patients with primary Sjögren's syndrome (pSS). MethodPatients with pSS treated in the China-Japan Friendship Hospital from December 2018 to October 2021 were enrolled and divided into different groups according to the presence of geographic tongue or the severity. Phi correlation analysis,Chi-square test, and Mann-Whitney test were used to analyze the clinical characteristics of patients with geographic tongue. ResultA total of 182 pSS patients were included in this study,including 75 (41.2%) patients with geographic tongue and 107 (58.8%) without geographic tongue. Partial exfoliation was more common than total exfoliation, and the anterior part of the tongue was the most common exfoliation site. The number of patients with severe geographic tongue was more than those with mild-to-moderate geographic tongue. Compared with pSS patients without geographic tongue,those with geographic tongue were more common in fissured tongue (92.0%/41.1%,χ2=48.491,P<0.05),red or crimson tongue (48.0%/23.3%,χ2=12.009,P<0.05),Yin deficiency syndrome (100.0%/43.9%,χ2=62.739,P<0.05),and Qi deficiency syndrome (94.7%∶50.5%,χ2=40.046,P<0.05),less common in phlegm-dampness syndrome (33.3%/72.0%,χ2=26.709,P<0.05),and showed higher proportions in hyperglobulinemia (89.3%/65.4%,χ2=13.547,P<0.01),ANA ≥1∶160 (78.1%/57.3%,χ2=8.227,P<0.01),and positive RF (51.4%/36.5%,χ2=3.877,P<0.05). Compared with pSS patients with mild geographic tongue,pSS patients with moderate-to-severe geographic tongue had higher proportions in hyperglobulinemia (98.1%/68.2%,χ2=14.617,P<0.01),positive anti-CENP-B (26.0%/4.8%,χ2=4.214,P<0.05),and reduced complement 3 (26.4%/4.5%,χ2=4.647,P<0.05). The geographic tongue was positively associated with fissured tongue (φ=0.531),Yin deficiency syndrome (φ=0.587),and Qi deficiency syndrome (φ=0.469),negatively associated with phlegm-dampness syndrome (φ=-0.447),and weakly associated with tongue color (φ<0.4). There was no statistical difference in the disease activity index between patients with or without geographic tongue and severity. ConclusionMore than 40% of pSS patients had geographic tongue accompanied by fissured tongue. Geographic tongue is positively associated with Yin deficiency syndrome and Qi deficiency syndrome,and negatively associated with phlegm-dampness syndrome, indicating that treatment should be based on tonifying Qi and nourishing Yin. Compared with pSS patients without geographic tongue, those with geographic tongue may have higher positive rate of some immune indicators,which deserves further exploration.
8.Traditional Chinese Medicine Syndrome of Primary Sjögren's Syndrome Patients with Interstitial Lung Disease
Jiaqi CHEN ; Jianying YANG ; Zihua WU ; Lining ZHANG ; Yan ZHANG ; Qi HU ; Qian HE ; Ziwei HUANG ; Xinbo YU ; Jing LUO ; Qingwen TAO
Chinese Journal of Experimental Traditional Medical Formulae 2023;29(8):66-72
ObjectiveTo summarize the characteristics of traditional Chinese medicine (TCM) syndrome in primary Sjögren's syndrome (pSS) patients with interstitial lung disease (ILD) and to explore associated factors. MethodA survey was conducted and pSS patients who were treated in TCM department of rheumatism at China-Japan Friendship Hospital from December 2018 to April 2022 were included. Tongue manifestations and syndromes of patients were recorded. pSS patients with ILD were classified into the pSS-ILD group and those without the ILD were included in the pSS-non-ILD group. The tongue manifestations, syndromes, and laboratory indexes were compared between the two groups, and logistic regression was used to explore the factors associated with pSS-ILD. ResultA total of 200 pSS patients were included, with 186 (93.0%) females, median age of 57 years, and median disease course of 60 months, of which 44 (22%) had pSS-ILD. In terms of tongue manifestations, pSS-ILD patients generally had dark/purple/stasis tongue, fissured tongue, and tongue with little fluid, thick coating, yellow coating, and greasy coating. The proportion patients with yellow coating was higher in pSS-ILD group than in the pSS-non-ILD group (χ2=4.799,P<0.05). In terms of syndrome, more than 40% of pSS-ILD patients had Qi deficiency, Yin deficiency, phlegm-dampness, Qi stagnation, and/or blood stasis syndrome. As for Yin deficiency, liver-kidney Yin deficiency syndrome ranked the first. For Qi deficiency, lung Qi deficiency syndrome was most commonly seen. The proportion of patients with lung Qi deficiency was higher in the pSS-ILD group than in the pSS-non-ILD group (χ2=18.667,P<0.01). As to laboratory indexes, compared with the pSS-non-ILD group, pSS-ILD group had high proportion of anti-SSA-positive patients (P<0.05) and high levels of C-reactive protein (CRP) (P<0.01), complement C3 (χ2=4.332,P<0.05), and complement C4 (P<0.05). Logistic regression analysis showed that pSS with ILD was positively associated with lung Qi deficiency [odds ratio (OR)=6.079, 95% confidence interval (CI) 2.585-14.298, P<0.01)] and yellow coating (OR=5.260, 95% CI 1.337-20.692, P<0.05) and negatively associated with low C4 (OR=0.199, 95% CI 0.070-0.564, P<0.01). ConclusionAbout 22% of pSS patients had ILD, and patients with pSS-ILD generally have Qi deficiency, Yin deficiency, phlegm-dampness, Qi stagnation, and/or blood stasis syndrome. Yellow coating, lung Qi deficiency and C4 level are factors associated with pSS combined with ILD.
9.Analysis of the current status of cancer incidence and mortality in Shanghai,2017 and trends of 2002-2017
Kai GU ; Yi PANG ; Chunxiao WU ; Chunfang WANG ; Liang SHI ; Yongmei XIANG ; Yangming GONG ; Peng PENG ; Jianming DOU ; Mengyin WU ; Xiaocong ZHANG ; Ganling DING ; Jianying YAN ; Yan SHI ; Chen FU
Tumor 2023;43(4):241-256
Background and purpose:The Shanghai Municipal Center for Disease Control and Prevention provides annual updates on cancer occurrence and trends in Shanghai.This study aimed to investigate the cancer incidence and mortality in 201 7 and their trends from 2002 to 2017 in Shanghai. Methods:Data of new cancer diagnoses and deaths from 2002 to 2017 were obtained from the Shanghai Municipal Center for Disease Control and Prevention population-based cancer registry and Vital Statistics System.Cancer incidence and mortality stratified by year of diagnosis or death,gender and age group were analyzed.Number,proportion,crude rate,age-specific rate,age-standardized rate and others were calculated.The number,proportion and rates of common cancers in different groups were also calculated.Trends in age-standardized rate of incidence and death rates for all cancers combined and for the common cancer types by gender were estimated by joinpoint analysis and characterized by the annual percent change(APC)and average annual percent change(AAPC).Segi's 1960 world standard population was used for calculating age-standardized incidence and mortality. Results:The new cancer cases and deaths were 79 378 and 37 186 in Shanghai in 2017.The crude rate of incidence was 546.55/105,and the age-standardized rate was 246.31/105.The age-standardized rate of incidence was higher among females than among males.The crude rate of mortality was 256.04/1 05,and the age-standardized rate was 88.41/105.The age-standardized rate of mortality was higher among males than among females.The age-specific numbers and rates of incidence and mortality increased with age.The age-specific number and rate of incidence reached the peak at the age groups of 60-64 years and older than 85 years,and those of mortality among males reached the peak at the age groups of 60-64 years and older than 85 years,and those of mortality among females reached the peak at the age groups of older than 85 years,respectively.The sites of top 10 common cancer types sorted by the number of incidence cases among males were lung,colorectum,stomach,prostate,liver,thyroid,pancreas,bladder,kidney and oesophagus,and among females were lung,breast,thyroid,colorectum,stomach,pancreas,liver,brain,central nervous system(CNS),cervix uteri and gallbladder,the sites of those sorted by the number of deaths among males were lung,stomach,colorectum,liver,pancreas,prostate,oesophagus,bladder,lymphoma and gallbladder,among females were lung,colorectum,breast,stomach,pancreas,liver,gallbladder,brain,CNS,ovary and lymphoma.The top 10 common cancer types stratified by gender and the top 5 common cancer types stratified by common age groups merged of incidence and mortality had wide variations.Overall,the age-standardized rates of incidence were stable from 2002 to 2009,and increased 2.88%on average per year from 2009 to 201 7.The age-standardized rates of mortality were stable from 2002 to 2011,and decreased 2.66%on average per year from 2011 to 201 7.The trends differed by gender and cancer type. Conclusion:Lung cancer,colorectal cancer,pancreatic cancer,thyroid cancer,female breast cancer,cervical cancer and male prostate cancer are the most common cancers in Shanghai,the appropriate screening technical scheme should be formulated according to the current situation of malignant tumors in Shanghai,promote cancer opportunistic screening,promote appropriate technologies for intervention and management of cancer patients in the community,reduce the disease burden of malignant tumors.
10.Analysis on Ileum and Colon Microflora of SPF Male SD Rats based on High-throughput Sequencing
Qin XU ; Yan NI ; Wenhui SHI ; Jianying LI ; Jiangwei LIU ; Hongqiong ZHAO ; Xinming XU
Laboratory Animal and Comparative Medicine 2023;43(1):53-60
Objective To analyze the microflora structure and abundance of ileum and colon of SPF male SD rats by high-throughput sequencing technique. MethodsThe ileal and colonic lumen contents of 30 SPF male SD rats were collected, the total bacterial DNA in the contents was extracted and amplified by PCR. The V3-V4 region of bacterial 16S rRNA in the samples was sequenced using Illumina NovaSeq sequencing platform. Then the species structure and abundance of the intestinal flora were analyzed at the phylum and genus level based on validated data. The diversity and differences between ileal and colonic flora were analyzed using the QIIME software (amplicon) analysis tool. The Tax4Fun program was applied to predict the dominant gene enrichment pathways of ileal and colonic flora. ResultsAt the phylum level, the dominant microflora in the ileum of male SD rats were Firmicutes and Actinobacteria, accounting for more than 98%. The dominant colonic microbial community were mainly Firmicutes and Bacteroidetes, accounting for more than 95%. At the genus level, Lactobacillus and Alistipes were the predominant bacteria in the ileum. The colon was dominated by Lactobacillus and Romboutsia. In terms of flora diversity, the alpha diversity of colonic flora including richness index (Chao1 index) and diversity index (Shannon index) were significantly higher than those of ileum (P < 0.01), and the structural variability of the composition of its flora species was smaller than that of ileum; the ileal flora with significant structural variability were mainly of the phylum Firmicutes, Romboutsia, Peptostreptococcaceae, while the colonic flora had significant structural differences in Bacteroidales. In terms of flora function, the ileal flora dominant genes were significantly enriched in lipid-like metabolism, polyketide metabolism, membrane transport, biodegradation and other pathways, while the colonic flora dominant genes were significantly enriched in glycan biosynthesis metabolism, energy metabolism, biosynthesis of cofactor and vitamins and other products, and other pathways. ConclusionThere are significant differences in structure and abundance between the ileal and colonic flora of SPF male SD rats, and the abundance and diversity of colonic flora are higher than those of ileal flora.

Result Analysis
Print
Save
E-mail