1.Analysis of HPV Infection Characteristics and Influencing Factors for Lesion Grade in Patients with Cervical Squamous Intraepithelial Lesion and Cervical Cancer
Jingjing HAN ; Lijie ZHANG ; Ruyu CAI ; Haili LI ; He WANG ; Le DANG ; Hongda CHEN ; Ming'e LI ; Lan ZHU
Medical Journal of Peking Union Medical College Hospital 2026;17(1):156-165
To summarize the distribution characteristics of human papillomavirus(HPV) infection types in patients with cervical squamous intraepithelial lesion(SIL) and cervical cancer(CC), and to explore the impact of HPV vaccination, HPV infection types, and general clinical data on different grades of cervical lesions. Clinical data of women attending the gynecological colposcopy clinic of Shenzhen People's Hospital from January 2020 to December 2023 were retrospectively collected. Patients with HPV genotyping records and histopathologically diagnosed SIL or CC were included and divided into three groups based on pathological results: low-grade squamous intraepithelial lesion(LSIL) group, high-grade squamous intraepithelial lesion(HSIL) group, and CC group. The distribution of high-risk HPV subtypes was analyzed among the three groups, and multivariate Logistic regression was used to identify influencing factors for high-grade cervical lesions. A total of 4162 patients were included, comprising 4057 cervical SIL patients(3317 LSIL and 740 HSIL) and 105 CC patients. The overall mean age was(39.9±11.2) years. The HPV infection rate was 95.1%(3959/4162), and 25.0%(1040/4162) of patients had received HPV vaccination. Among high-risk HPV infections, HPV 52, HPV 16, HPV 58, and HPV 18 were the most common subtypes. HPV 52 had the highest infection rate in the LSIL group(27.6%), while HPV 16 was the most prevalent in the HSIL group(45.3%) and CC group(64.9%). Multivariate Logistic regression analysis showed that HPV vaccination( HPV infection is common in patients with SIL and CC, but the distribution of high-risk HPV subtypes varies among different grades of cervical lesions. It is recommended to strengthen cervical cancer screening and monitoring of key high-risk HPV infections in older and multiparous women in Shenzhen, and to continue promoting HPV vaccination.
2.Predictive risk analysis for pneumoconiosis combined with tuberculosis
Mengting LIU ; Zhuyubing FANG ; Haili ZHAO ; Zhuoyue SHI ; Rong HAI ; Li NING
Chinese Journal of Industrial Hygiene and Occupational Diseases 2025;43(1):49-54
Objective:To explore the risk factors of pneumoconiosis complicated with pulmonary tuberculosis, to construct a clinical prediction model for patients with pneumoconiosis complicated with pulmonary tuberculosis, and to provide a scientific basis for the prevention of pneumoconiosis complicated with pulmonary tuberculosis.Methods:In January 2024, a total of 232 patients with pneumoconiosis (including coal workers' pneumoconiosis and silicosis) who were treated in the Department of Respiratory and Critical Care Medicine of the Third People's Hospital of Xinjiang Uygur Autonomous Region (Xinjiang Uygur Autonomous Region Occupational Disease Hospital) from January 2022 to January 2023 were randomly selected as the study subjects. Collectted basic patient information and diagnostic data. Multivariate logistic regression analysis was used to screen the risk factors related to pneumoconiosis complicated with pulmonary tuberculosis. According to the results of multivariate logistic regression analysis, a nomogram was established, and the area under the receiver operating characteristic (ROC) curve (AUC), calibration curve and decision curve analysis (DCA) were used to evaluate the predictive ability.Results:Among the 232 patients with pneumoconiosis, 73 were complicated with pulmonary tuberculosis, accounting for 31.47% (73/232). Multivariate logistic regression analysis determined that dust exposure time, type of work, smoking history, and lung function level were all risk factors for pneumoconiosis complicated with tuberculosis ( OR=10.33, 95% CI=1.92~55.66, OR=5.43, 95% CI=1.91~15.44, OR=3.10, 95% CI=1.15~8.37, OR=4.00, 95% CI=1.62~9.87; P<0.05). The constructed nomogram model has good clinical applicability when the area under the receiver operating characteristic (ROC) curve is 0.77 [95% CI (0.69, 0.73) ], the calibration curve is close to the ideal diagonal, the absolute error between the simulation curve and the actual curve is 0.03, and the DCA decision curve shows that the probability threshold of the nomogram model is 1%-90%. Conclusion:The risk of pneumoconiosis complicated with tuberculosis is high, and the risk factors of dust exposure time, smoking history, type of work and lung function level are high. This nomogram model can be used to predict the risk of pulmonary tuberculosis in patients with pneumoconiosis, which is helpful for early intervention.
3.Application effect of H2H model in rehabilitation nursing for patients undergoing radical mastectomy
Xueyan LI ; Fangning GAO ; Yun ZHANG ; Fang SHANG ; Haili TANG
Journal of Clinical Medicine in Practice 2025;29(6):123-127
Objective To observe the application effect of the H2H model in rehabilitation nurs-ing for patients undergoing radical mastectomy.Methods A total of 294 patients who underwent rad-ical mastectomy were enrolled as study subjects and randomly divided into conventional group and H2H group using a simple randomization method(coin toss),with 147 patients in each group.The conventional group received routine nursing interventions,while the H2H group received nursing in-terventions based on the H2H model.At 1 week and 3 months post-intervention,shoulder joint func-tion[assessed using the Constant-Murley Shoulder Function Score(CMS)],nutritional indicators(serum albumin,hemoglobin)levels,self-management efficacy[assessed using the Self-care Self-ef-ficacy Scale(SUPPH)],and quality of life[assessed using the Functional Assessment of Cancer Therapy-Breast(FACT-B)]were observed and compared between the two groups.Results At 3 months post-intervention,the pain,daily living activities,range of motion,and muscle strength scores in the CMS were higher than those at 1 week post-intervention in both groups,with the H2H group showing higher scores than the conventional group,and the differences were statistically signifi-cant(P<0.05).At 3 months post-intervention,the albumin and hemoglobin levels were lower than those at 1 week post-intervention in both groups,but the H2H group had higher levels than the con-ventional group,and the differences were statistically significant(P<0.05).At 3 months post-inter-vention,the positive attitude,self-decision-making,and self-stress reduction scores in the SUPPH were higher than those at 1 week post-intervention in both groups,with the H2H group showing higher scores than the conventional group,and the differences were statistically significant(P<0.05).At 3 months post-intervention,the scores for physical well-being,social/family well-being,emotional well-being,functional well-being,and the breast cancer-specific module in the FACT-B were higher than those at 1 week post-intervention in both groups,with the H2H group showing higher scores than the conventional group,and the differences were statistically significant(P<0.05).Conclu-sion The application of the H2H model in rehabilitation nursing for patients after radical mastecto-my can promote the recovery of shoulder joint function,improve nutritional status,and enhance self-management efficacy and quality of life.
4.Value of VI-RADS scoring combined with tumor quantitative MRI parameters in assessing muscle invasion of bladder cancer
Haili LIU ; Yijian CHEN ; Yuanhao MA ; Jian ZHAO ; Huiping GUO ; Xiaohui DING ; Guijuan ZHAI ; Fei YAN ; Wei XU ; Tianran LI ; Haiyi WANG
Chinese Journal of Radiology 2025;59(5):558-564
Objective:To explore the value of the vesical imaging-reporting and data system (VI-RADS) score based on multiparametric MRI (mpMRI) combined with quantitative tumor MRI parameters in assessing the muscle invasion of bladder cancer.Methods:The study was a case-control study. The data of 87 bladder cancer patients confirmed by pathology who underwent mpMRI of the bladder were retrospectively collected from the First Medical Center of Chinese PLA General Hospital between January 2019 and April 2023 The pathological findings were used as the gold standard to categorize them into the muscle invasive bladder cancer (MIBC) group (29 cases) and non-muscle invasive bladder cancer (NMIBC) group (58 cases). Quantitative parameters were measured based on preoperative mpMRI images, including the length of tumor bladder wall contact, the perpendicular distance between the bladder tumor and the tangent of the bladder wall, the maximal diameter of the bladder tumor, and the volume of the bladder tumor. Bladder cancer was classified according to the VI-RADS scoring criteria. The Mann-Whitney U test was used for intergroup comparisons. Multivariate logistic regression analysis was performed to obtain the independent risk factors related to muscle invasion of bladder cancer and to establish the model. The receiver operating characteristic curves were analyzed for MRI quantitative parameters and logistic regression models, and area under the curve (AUC) comparisons were performed using the DeLong test. Results:The differences in tumor bladder wall contact length, perpendicular distance from the tumor to the tangent line of the bladder wall, maximum diameter, bladder tumor volume, and the VI-RADS scores were statistically significant between the MIBC group and the NMIBC group ( P<0.05). Multifactorial logistic regression analysis showed that tumor bladder wall contact length ( OR=21.07, 95% CI 3.56-124.89, P=0.001) and VI-RADS score ( OR=11.90, 95% CI 3.53-40.12, P<0.001) were the independent risk factors for evaluating the muscle invasion of bladder cancer. The difference between the VI-RADS score and the tumor bladder wall contact length for assessing muscular infiltration of bladder cancer had AUCs of 0.802 (95% CI 0.704-0.899) and 0.759 (95% CI 0.652-0.865). The combined model of VI-RADS score combined with tumor bladder wall contact length had an AUC of 0.891 (95% CI 0.812-0.970), which was higher than the diagnostic efficacy of applying tumor bladder wall contact length or VI-RADS score alone ( Z=3.05, 2.37, P=0.002, 0.018). Conclusion:Tumor contact length with the bladder wall is an independent risk factor for assessing muscle invasion of bladder cancer and the combination of VI-RADS score may enhances diagnostic accuracy.
5.Clinical and genetic analysis of a Chinese pedigree with autosomal recessive familial intrahepatic cholestasis type I due to a novel variant of ATP8B1 gene.
Zhimin WANG ; Haili QI ; Xiaojuan WEI ; Hualing DUAN ; Xiaohuan LI ; Hongyang QI
Chinese Journal of Medical Genetics 2025;42(5):608-612
OBJECTIVE:
To investigate the clinical and genetic features of a Chinese pedigree with Progressive familial intrahepatic cholestasis (PFIC) and explore its genotype-phenotype correlation.
METHODS:
A patient with PFIC diagnosed at Xinxiang Central Hospital in 2023 was selected as the study subject. The patient was subjected to abdominal magnetic resonance imaging (MRI) and painless gastroscopy. Peripheral blood samples were collected from the patient and his parents for the extraction of genomic DNA and trio-whole exome sequencing (trio-WES). Candidate variants were verified by Sanger sequencing. This study has been approved by the Medical Ethics Committee of Xinxiang Hospital (Ethics No. 2023-241).
RESULTS:
MRI scan showed that the patient had significantly enlarged liver and spleen. WES revealed that he has harbored compound heterozygous variants of the ATP8B1 gene, including a c.1710_1711insCCTC (p.A571Pfs*12) frameshifting variant in exon 16 and a c.2989G>A (p.V997M) missense variant in exon 24, which were respectively inherited from his father and mother, and rated as pathogenic (PVS1+PM2_Supporting+PM3+PP1) and likely pathogenic (PM2_Supporting+PM3+PP1) based on the guidelines from the American College of Medical Genetics and Genomics (ACMG).
CONCLUSION
WES can clarify the genetic etiology of patients with speed and accuracy, and facilitate clinical decision-making. The detection of pathogenic variants has provided a basis for clinical diagnosis and enriched the mutational spectrum of the ATP8B1 gene.
Humans
;
Male
;
Pedigree
;
Cholestasis, Intrahepatic/diagnostic imaging*
;
Adenosine Triphosphatases/genetics*
;
Female
;
Adult
;
Exome Sequencing
;
Mutation
;
East Asian People
6.Learning curve analysis of primary urologists mastering Holmium laser enucleation of the prostate
Chao WANG ; Ye TIAN ; Zhi QU ; Liwen ZHANG ; Lei CHEN ; Lijun YANG ; Haili LI ; Chenxi LI
International Journal of Surgery 2025;52(6):403-408
Objective:To explore the learning curve of primary urologists mastering Holmium laser enucleation of the prostate for the treatment of large volume benign prostatic hyperplasia (BPH).Methods:The clinical data of 92 patients with larger volume BPH who received HoLEP performed by a urologist in Beijing Friendship Hospital Pinggu Campus, Capital Medical University were retrospectively reviewed. 92 patients were divided into group A (1-23 cases, n=23), group B (24-46 cases, n=23), group C (47-69 cases, n=23), and group D (70-92 cases, n=23) based on the sequence of surgery. The clinical characteristics, including prostate volume, operation time, enucleation efficiency, indwelling catheter time, decrease value of hemoglobin, intraoperative blood transfusion, perioperative complications, and international prostate symptom score (IPSS), quality of life (QOL) score, Qmax, and postvoid residual urine (PVR) at 3 months postoperatively were compared between the four groups. Measurement data were expressed as mean ± standard deviation ( ± s), one-way analysis of variance was used for comparisons among multiple groups, and t-test was used for comparisons between two groups. Count data were expressed as the cases and percentage, and the Chi-square test was used for comparison between groups. Results:There were significant differences among the four groups in terms of operation time [(94.43±8.26) min, (86.39±5.89) min, (70.70±5.64) min, (64.70±4.23) min, P=0.001], enucleation efficiency [(0.90±0.08) mL/min, (1.01±0.07) mL/min, (1.23±0.12) mL/min, (1.34±0.12) mL/min, P=0.001], decrease value of hemoglobin [(25.98±1.39) g/L, (23.27±1.49) g/L, (20.03±1.07) g/L, (18.49±0.96) g/L, P=0.001] and indwelling catheter time [(5.91±1.54) d, (5.35±1.27) d, (3.39±0.72) d, (3.04±0.64) d, P=0.001]. Compared with group C and group D, the operation time was longer, the enucleation efficiency was lower, the decrease value of hemoglobin before and after the operation was higher, and the indwelling catheter time was longer, the above differences were all statistically significant ( P<0.05). However, there was no statistically significant difference between group A and group B, or group C and group D ( P>0.05). Among the 92 patients, only 3 patients received blood transfusion during operation, including 2 patients in group A and 1 patient in group B. 2 patients underwent surgical complications during the perioperative period. Among them, 1 patient suffered bladder wall injury due to improper operation of the tissue pulverizer in group A, and 1 patient developed prostatic capsule perforation in group B. Furthermore, after 56 cases of operation, a primary urologist can perform HoLEP surgery quickly and safely. Conclusion:The learning curve of a primary urologist mastering HoLEP for larger volume (≥ 80 mL) BPH was 56 procedures, and the operation efficiency and safety were significantly improved.
7.Advances in the clinical and translational applications of breast cancer organoids
Lixi LI ; Boshi DUAN ; Haili QIAN ; Fei MA
Journal of International Oncology 2025;52(6):379-381
Breast cancer organoids faithfully reflect the structural and functional characteristics of primary tumors, demonstrating broad application potential. Clinically, organoids have been utilized for drug sensitivity testing, significantly enhancing the precision of personalized treatment strategies. Organoids play a crucial role in accelerating new drug development, uncovering drug resistance mechanisms, and improving the efficacy of immunotherapy. In-depth analysis of the application of breast cancer organoid technology in clinical and transformation can provide new ideas for clinical diagnosis and treatment of breast cancer.
8.Analysis of Clinical Efficacy of Xiaqi Decoction on Cancer-Related Fatigue in Patients with Stage Ⅲ-Ⅳ Colorectal Cancer After Chemotherapy
Shoujie LI ; Haili GAO ; Nianhua ZHANG
Journal of Guangzhou University of Traditional Chinese Medicine 2025;42(2):358-366
Objective To investigate the clinical efficacy of Xiaqi Decoction(mainly composed of Poria,Pinelliae Rhizoma Praeparatum,Glycyrrhizae Radix et Rhizoma Praeparata cum Melle,Armeniacae Semen Amarum,Citri Grandis Exocarpium,Paeoniae Radix Alba,Polygoni Multiflori Radix,and Moutan Cortex)on patients with stage Ⅲ-Ⅳ colorectal cancer accompanied by cancer-related fatigue(CRF)after chemotherapy.Methods Sixty patients with stage Ⅲ-Ⅳ colorectal cancer accompanied by CRF after chemotherapy who admitted to Guangdong Second Traditional Chinese Medicine Hospital from January 2023 to March 2024 were randomly divided into chemotherapy group and Xiaqi Decoction group according to the random number table method,with 30 patients in each group.The chemotherapy group was given chemotherapy regimen of Avastin+mFOLFOX6/FOLFIRI,and Xiaqi Decoction group was given Xiaqi Decoction orally on the basis of treatment for the chemotherapy group.Two weeks constituted a course of treatment,and two consecutive courses of treatment were performed.Before and after treatment,the two groups were observed in the changes of Revised Piper Fatigue Scale(PFS-R)scores,EORTC Quality of Life Questionnaire-Core 30(QLQ-C30)scores,Patient-Generated Subjective Global Assessment(PG-SGA)scores,Karnofsky Performance Status(KPS)scores,poor appetite scores,and serum levels of interleukin 6(IL-6),tumor necrosis factor α(TNF-α),and interleukin 1β(IL-1β)were observed.After treatment,the clinical efficacy and safety between the two groups of patients were evaluated.Results(1)After two courses of treatment,the total effective rate of the Xiaqi Decoction group was 86.21%(25/29)and that of the chemotherapy group was 62.07%(18/29),and the intergroup comparison(tested by chi-square test)showed that the efficacy of Xiaqi Decoction group was significantly superior to that of chemotherapy group(P<0.05).(2)In the second and fourth weeks of chemotherapy,the PFS-R scores for evaluating the degree of fatigue of patients in the two groups were increased when compared with those in the day before chemotherapy(P<0.05),but the PFS-R scores in Xiaqi Decoction group were significantly lower than those in the chemotherapy group after chemotherapy(P<0.01).(3)In the second and fourth weeks of chemotherapy,the QLQ-C30 scores for evaluating the quality of life in the chemotherapy group was decreased when compared with that one day before chemotherapy(P<0.05),whereas the QLQ-C30 scores in the Xiaqi Decoction group showed no obvious changes when compared with that one day before chemotherapy(P>0.05).The intergroup comparison showed that the QLQ-C30 scores of the Xiaqi Decoction group were all significantly higher than those of the chemotherapy group after chemotherapy(P<0.01).(4)The evaluation of nutritional status showed that in the fourth week of chemotherapy,PG-SGA score and poor appetite score in the two groups as well as KPS score in Xiaqi Decoction group were increased when compared with those one day before chemotherapy(P<0.05),while the KPS score in the chemotherapy group was decreased when compared with that one day before chemotherapy(P<0.05).The intergroup comparison showed that PG-SGA score and poor appetite score of Xiaqi Decoction after chemotherapy were lower than those of the chemotherapy group,and the KPS score was higher than that of the chemotherapy group,the differences being statistically significant(P<0.05 or P<0.01).(5)In the chemotherapy group,the serum inflammatory factor levels of TNF-α and IL-6 in the second week of chemotherapy and the serum TNF-α,IL-1β and IL-6 levels in the fourth week of chemotherapy were all increased when compared with those one day before chemotherapy(P<0.05).In the Xiaqi Decoction group,the serum TNF-α,IL-1β,and IL-6 levels were all decreased when compared with those one day before chemotherapy,and significant differences were shown in the serum IL-6 level in the second week of chemotherapy and in the serum levels of IL-1β and IL-6 in the fourth week of chemotherapy when compared with those one day before chemotherapy(P<0.05).The intergroup comparison showed that serum TNF-α,IL-1β,and IL-6 levels in the Xiaqi Decoction group after chemotherapy were significantly lower than those in the chemotherapy group(P<0.05 or P<0.01).Conclusion Xiaqi Decoction is effective on relieving the clinical symptoms and enhancing the efficacy of patients receiving chemotherapy for stage Ⅲ-Ⅳ colorectal cancer.It can inhibit the expression of inflammatory factors,relieve the CRF and improve the nutritional status and the quality of life of the patients,with higher safety.
9.Effects of Xiaqi Decoction on Chemotherapy-Induced Cancer-Caused Fatigue,Tumor Body and Expressions of TLR4 and NF-κB p65 in Mice with Colon Cancer
Shoujie LI ; Haili GAO ; Nianhua ZHANG
Journal of Guangzhou University of Traditional Chinese Medicine 2025;42(3):725-731
Objective To observe the therapeutic effect and mechanism of Xiaqi Decoction for mice with chemotherapy-induced cancer-related fatigue(CRF)in colon cancer.Methods The successfully constructed chemotherapy-induced CRF mouse model of colon cancer was randomly divided into the model control group and the Xiaqi Decoction group,with 10 mice in each group,and a blank control group was also set up.After each group was given the corresponding intervention,the mice exhaustive swimming time was determined,the tumor size was measured,the tumor inhibition rate was calculated,and the serum levels of inflammatory factors such as tumor necrosis factor(TNF)-α,interleukin(IL)-1β,IL-6 and other safety indicators such as alanine aminotransferase(ALT),aspartate aminotransferase(AST)and blood ureanitrogen(BUN)were detected by enzyme-linked immunosorbent assay(ELISA),the protein expression levels of Toll-like receptor 4(TLR4)and nuclear factor κB(NF-κB)p65 in the epithelial cells of tumor lumps(or axillary tissues)were detected by Western Blot.Results(1)Before treatment,the exhaustive swimming time of mice in the model control group was significantly less than that of the blank control group(P<0.01);after 28 days of treatment,the exhaustive swimming time of mice in the Xiaqi Decoction group was significantly longer than that of the model control group(P<0.01),and it was time-dependent.(2)The tumor size of mice in the Xiaqi Decoction group was gradually decreased from 4-28 days of treatment,and the tumor inhibition rate was 68.96%after 28 days of treatment.(3)The serum levels of TNF-α,IL-1β and IL-6 in the model control group were significantly higher than those in the blank control group(P<0.01);and the serum levels of TNF-α,IL-1β and IL-6 in the Xiaqi Decoction group were significantly lower than those in the model control group(P<0.05).(4)The serum levels of ALT,AST and BUN in the model control group were higher than those in the blank control group(P<0.05 or P<0.01);the serum levels of ALT,AST and BUN in the Xiaqi Decoction group were lower than those in the model control group(P<0.05).(5)The protein expression levels of TLR4 and NF-κB p65 in tumor epithelial cells of the model control group were higher than those of the blank control group(P<0.01);the protein expression levels of TLR4 and NF-κB p65 in tumor epithelial cells of the Xiaqi Decoction group were lower than those of the model control group(P<0.01).Conclusion Xiaqi Decoction can effectively promote physical recovery,and inhibit tumor growth in mice with chemotherapy-induced CRF of colon cancer,and its mechanism may be related to the inhibition of TLR4 and NF-κB p65 expression,thus to reduce the inflammatory response,with certain degree of safety.
10.Expression of Rift Valley fever virus Gn-D Ⅱ-Ⅲ and development of indirect ELISA for RVFV antibody detection
Jiaoyan LUAN ; Mengyao ZHANG ; Cuicui JIAO ; Xiangyang ZHANG ; Lisi AI ; Pei HUANG ; Yuanyuan LI ; Haili ZHANG ; Hualei WANG
Chinese Journal of Veterinary Science 2025;45(6):1186-1193,1209
This study aims to establish an indirect ELISA method for detecting RVFV antibodies u-sing recombinant proteins of Rift Valley fever virus(RVFV)Gn protein Ⅱ-Ⅲ structural domains as the encapsulated antigen which was expressed by the Escherichia coli(E.coli)expression sys-tem.The gene sequences encoding the Ⅱ and Ⅲ subdomains of RVFV Gn protein were inserted in-to pET-30a(+)to construct the recombinant plasmid pET-RVFV Gn-D Ⅱ-Ⅲ.After transforma-tion of the recombinant plasmid into DE3(BL21)competent cells,the recombinant Gn-D Ⅱ-Ⅲ protein was induced with IPTG and purified using affinity chromatography.An indirect ELISA method for the detection of RVFV antibodies was developed using purified recombinant protein as coating antigen and SPA-HRP as the enzyme-labelled secondary antibody.Western blot analysis confirmed that the RVFV Gn-D Ⅱ-Ⅲ protein was successfully expressed.The optimal expression conditions for RVFV Gn-D Ⅱ-Ⅲ protein were induced with 0.8 mmol/L IPTG at 37 ℃ for 5 h.The Gn-D Ⅱ-Ⅲ protein was purified using affinity chromatography with a purity of 91.9%,and the purified protein was used as the encapsulated antigen to develop an ELISA assay for RVFV anti-bodies.The specificity evaluation showed that the method specifically detected RVFV-positive sera and did not cross-react with sera positive for West Nile virus(WNV),Ebola virus(EBOV),Mar-burg virus(MARV)and tick-borne encephalitis virus(TBEV).When the RVFV Gn-D Ⅲ-Ⅲ posi-tive serum was diluted to 6 400 times,the test result still showed positive results,demonstrating the method had good sensitivity.The repeatability evaluation results indicated that the variation co-efficients for both intra-and inter-batch responses was less than 10%,indicating that the method had good repeatability.In conclusion,the RVFV Gn-D Ⅱ-Ⅲ protein was successfully expressed u-sing the E.coli expression system.The purified recombinant Gn-D Ⅱ-Ⅲ protein was used as the encapsulated antigen to develop an indirect ELISA assay for RVFV antibodies,which provides a preliminary basis for the diagnosis of RVF and the research and development of RVF vaccines.

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