ObjectivesTo investigate the molecular epidemiological characteristics of HIV-1 infection among men who had sex with men (MSM) in Taizhou City, Zhejiang Province, and to provide a scientific reference for acquired immune deficiency syndrome prevention and control efforts. MethodsThe research subjects were all newly reported MSM population in Taizhou City from 2020 to 2023. Blood samples without antiviral therapy were collected. The HIV-1 pol gene was amplified and sequenced, and the sequences were submitted to the Stanford University drug resistance database to identify the mutation sites and drug resistance. MEGA 11.0 software was used to analyze the nucleic acid sequences, construct phylogenetic tree, and calculate genetic distance of gene sequences. The molecular transmission network diagram of HIV-1 was constructed using Cytoscape_v3.10.1, and the influencing factors of network entry were analyzed by logistic regression. ResultsA total of 363 newly reported HIV-infected MSM patients were included, with a median age [M (P₂₅, P₇₅)] of 34 (26,47) years old. The majority had an educational level of junior high school or below (55.65%). A total of eight subtypes were found, mainly CRF07_BC and CRF01_AE. The primary drug resistance rate was 10.47% (38/363). The optimal molecular network gene distance was 0.019, with a network access rate of 42.70% (155/363), and a total of 47 molecular clusters were formed. Multivariate logistic analyses showed that compared with the CRF01_AE subtype, the clustering risk of CRF07_BC subtype was higher (OR=1.916, 95%CI: 1.191‒3.109), cases with drug resistance had a higher risk of cluster formation than those without drug resistance (OR=2.011, 95%CI: 1.006‒4.080), and recent infected patients had a lower risk of entering the largest molecular cluster than long-term infected patients (OR=0.376, 95%CI: 0.137‒0.928). ConclusionThe newly diagnosed infections among the MSM population are active in Taizhou City, Zhejiang Province, with a high level of primary drug resistance. Individuals carrying drug-resistant strains are more likely to cluster. Drug resistance monitoring should be strengthened to prevent further spread of drug-resistant strains in the network.

ObjectiveTo analyze the failure of antiretroviral therapy (ART) and drug resistance characteristics among the newly reported HIV-infected patients in Taizhou City from 2020 to 2022. MethodsBlood samples, sociodemographic characteristics and ART information of the newly reported HIV-infected patients who received ART for ≥6 months in Taizhou City from 2020 to 2022 were collected for the detection of recent infections and HIV-1 genotypic drug resistance. Multivariate logistic regression analysis was used to analyze the influencing factors of treatment failure. The gene sequences of cases with failed ART were submitted to the HIV drug resistance database of Stanford University to determine the drug resistance mutation sites and drug resistance characteristics. ResultsAmong the 1 023 newly reported HIV-infected patients receiving ART, the median age （P₂₅，P₇₅） was 47 (33, 58) years, 81.4% were male, 66.4% (679/1 023) were infected through heterosexual transmission, 74.7% had a WHO clinical stage Ⅰ/Ⅱ, 62.2% had a baseline CD4 count of >200 cell·μL^-1, 94.4% (966/1 023) received an immediate ART, and 78.7% were long-term infected. Among the 66 patients with treatment failure (6.5%), the likelihood of treatment failure was lower in those with homosexual transmission (OR=0.39, 95%CI: 0.17‒0.84) and without history of sexually transmitted disease (STD) (OR=0.45, 95%CI: 0.24‒0.92), but higher in those with a baseline CD4 count of ≤200 cell·μL^-1, delayed ART (OR=3.19, 95%CI: 1.24‒7.52), and primary drug resistance (OR=4.69, 95%CI: 1.68‒11.89). Among the 36 HIV-infected patients with virological failure, 27 sequences were successfully amplified, with a successful amplification rate of 75.0% (27/36). The total drug resistance rate was 55.6% (15/27), of which the drug resistance rates of nucleoside reverse transcriptase inhibitors (NRTIs), non-nucleoside reverse transcriptase inhibitors (NNRTIs) and protease inhibitors (PIs) were 37.0% (10/27), 51.9% (14/27) and 3.7% (1/27), respectively. Among the NNRTIs, the degree of resistance to efavirenz and nevirapine was consistent, with a majority (51.9%) of highly drug-resistant. K103N and M184V were the most common mutation sites, but PIs mutations occured less frequently. A total of 8 genotypes of HIV-1 were detected, in which subtype CRF01_AE accounted for 37.0% (10/27), followed by CRF07_BC [14.8% (4/27)], CRF08_BC [14.8% (4/27)] and subtype C [14.8% (4/27)]. ConclusionDuring the period from 2020 to 2022, the newly reported HIV-infected individuals in Taizhou City were predominated by long-term infections. Immediate initiation of ART can reduce the risk of treatment failure in HIV-infected individuals. Virological treatment failures are primarily associated with resistance to NRTIs and NNRTIs. It is recommended to strengthen active detection and promptly initiate ART to minimize the occurrence of ART failure. Simultaneously, there is a need to intensify drug resistance detection targeted for those with treatment failure, so as to provide a scientific guidance for drug replacement.

Bacterial cellulose(BC)is a type of extracellular polymeric nanomaterial secreted by microorganisms over the course of their growth.It has gained significant attention in the field of bone tissue engineering due to its unique structure of three-dimensional fibrous network,excellent biocompatibility,biodegradability,and exceptional mechanical properties.Nevertheless,BC still has some weaknesses,including low osteogenic activity,a lack of antimicrobial properties,small pore size,issues with the degradation rate,and a mismatch in bone tissue regeneration,limiting its standalone use in the field of bone tissue engineering.Therefore,the modification of BC and the preparation of BC composite materials have become a recent research focus.Herein,we summarized the relationships between the production,modification,and bone repair applications of BC.We introduced the methods for the preparation and the modification of BC.Additionally,we elaborated on the new advances in the application of BC composite materials in the field of bone tissue engineering.We also highlighted the existing challenges and future prospects of BC composite materials.

【Objective】 To conduct the laboratory quality assessment between 12 blood stations in Hebei province, analyze the results and explore the accuracy and comparability of testing, so as to improve the level of testing ability and quality management. 【Methods】 With reference to the external quality assessment rules of National Center for Clinical Laboratories and combined with the instructions of quality assessment samples, daily testing process of the laboratories were assessed. The quality indicators include blood cell count (WBC, RBC, Hb, HCT, MCV, MCH, MCHC and PLT), biochemical items (TP) and coagulation parameters (FIB and FⅧ). 【Results】 There are still problems in laboratories in terms of personnel operation, instrument maintenance and the impact of different reagent batches, especially in biochemical items and coagulation parameters. The pass rate of biochemical items was the lowest, only 72.75%, and that of blood cell count was the highest, reaching 98.75%. 【Conclusion】 With the progress of the project, the quality monitoring level of daily blood sampling tests in the quality control laboratory of each blood station has been improved. However, it is still necessary for each laboratory to improve the testing ability and quality management to a higher level in Hebei.

Objective:To investigate the application of preauricular fascial pedicle mandibular flap for wound healing in upper-middle face of skin tumour.Methods:Select upper-middle face of skin tumour patients who were treated in department of oncology, first affiliated hospital of Bengbu medical college from December 2018 to October 2020..According to the defect site and scope, primary repair of a large range of skin and soft tissues of face by using preauricular fascial pedicle mandibular flap.Results:The group inclouded 10 cases of skin tumour, 5 males and 5 females, aged from 55 to 86 years, mandibular flap were all developed well and the configuration and function were satisfactory. After 3- 22 months of follow-up, no local recurrence and complications, such as difficulty of eyelid closure and deviation of mouth angle.Conclusions:Preauricular fascial pedicle mandibular flap technique with simple operation, safety and reliability.The flap with long pedicle and large area can be cut and it also can achieve 180° rotation to repair postoperative tissue defect wound in upper-middle face of skin cancer, lead to good effects of appearance and functionality.

Objective:To investigate the application of the preauricular fascial pedicled mandibular flap for wound healing after upper-middle face skin tumor resection.Methods:The patients with upper-middle face skin tumor were selected, who were treated in the Department of Oncology, First Affiliated Hospital of Bengbu Medical College from December 2018 to October 2020. According to the location and size of the defects, large defects of facial skin and soft tissues were primarily repaired by using the preauricular fascial pedicled mandibular flap.Results:This study included 10 cases of skin tumour, 5 males and 5 females, aged from 55 to 86 years. The mandibular flaps were all developed well and the appearance and function were satisfactory. After 3-22 months of follow-up, no local recurrence and complications occurred, such as difficulty of eyelid closure and deviation of commissure.Conclusions:Preauricular fascial pedicled mandibular flap technique has such advantages as simple operation, safety and reliability. The flap can be obtained with a long pedicle and a large area and it also can achieve a maximum of 180° rotation to repair postoperative tissue defects in upper-middle face of skin cancer resection, leading to good outcome of appearance and functionality.

Objective:To investigate the application of preauricular fascial pedicle mandibular flap for wound healing in upper-middle face of skin tumour.Methods:Select upper-middle face of skin tumour patients who were treated in department of oncology, first affiliated hospital of Bengbu medical college from December 2018 to October 2020..According to the defect site and scope, primary repair of a large range of skin and soft tissues of face by using preauricular fascial pedicle mandibular flap.Results:The group inclouded 10 cases of skin tumour, 5 males and 5 females, aged from 55 to 86 years, mandibular flap were all developed well and the configuration and function were satisfactory. After 3- 22 months of follow-up, no local recurrence and complications, such as difficulty of eyelid closure and deviation of mouth angle.Conclusions:Preauricular fascial pedicle mandibular flap technique with simple operation, safety and reliability.The flap with long pedicle and large area can be cut and it also can achieve 180° rotation to repair postoperative tissue defect wound in upper-middle face of skin cancer, lead to good effects of appearance and functionality.

Objective:To investigate the application of the preauricular fascial pedicled mandibular flap for wound healing after upper-middle face skin tumor resection.Methods:The patients with upper-middle face skin tumor were selected, who were treated in the Department of Oncology, First Affiliated Hospital of Bengbu Medical College from December 2018 to October 2020. According to the location and size of the defects, large defects of facial skin and soft tissues were primarily repaired by using the preauricular fascial pedicled mandibular flap.Results:This study included 10 cases of skin tumour, 5 males and 5 females, aged from 55 to 86 years. The mandibular flaps were all developed well and the appearance and function were satisfactory. After 3-22 months of follow-up, no local recurrence and complications occurred, such as difficulty of eyelid closure and deviation of commissure.Conclusions:Preauricular fascial pedicled mandibular flap technique has such advantages as simple operation, safety and reliability. The flap can be obtained with a long pedicle and a large area and it also can achieve a maximum of 180° rotation to repair postoperative tissue defects in upper-middle face of skin cancer resection, leading to good outcome of appearance and functionality.

Objective To investigate MRI features of metanephric adenoma(MA). Methods The retrospective analysis was performed on 6 adult patients that were scanned by regular, DWI and dynamic-enhancement MRI two weeks before surgery and diagnosed with MA pathologically after surgery. MRI features of lesions were observed. The signal intensities of lesions and contralateral normal renal cortex and medulla were respectively measured in plain scan, cortex, parenchyma and delayed phase. The enhancement magnitudes were calculated and the ADC values of lesions were measured. The differences of the signal intensity and enhancement magnitude were assessed by paired-sample t test among renal cotex, medulla and lesions. Results All lesions in MA were single and solid masses. Four cases occurred in the right kidney and two cases in the left kidney. The maximum diameters of the lesions ranged from 21 to 79 mm and the mean value was(41 ± 20)mm. Five cases were round or oval, while one case was irregular. The signal intensity in five cases was slightly lower in T2WI than the renal parenchyma, while one case was slightly higher than the renal parenchyma. The hyperintentsity of DWI and hypointensity of ADC were seen in all cases. The mean ADC value was(0.759 ± 0.211) × 10-3mm2/s. Hemorrhage were seen in two cases. Necrosis was present in one case and the capsules were seen in two cases. No scar, fat and swollen lymph nodes was seen in all cases . There was no statistical significance of the signal intensity between lesions measure in the plain scan and normal renal parenchyma(P>0.05). After adminstrating contrast materials, all lesions shown persistently mild to moderate enhancement . The siganl intensities of lesions measured in three phases after enhancement were signifcantly lower than those of the renal cortex(P<0.05). No significant differences of the signal intensity measured in cortex and medulla phase between lesions and normal renal medulla was present(P>0.05). But the signal intensities of leisons in delayed phases were significantly lower than thoseof renal medulla(P<0.05). Except from the difference of enhanced magnitude in cortex phase between lesions and normal medulla, significant differences were present between leisons and normal renal parenchyma(P<0.05). Conclusion MRI manifestations of MA show certain distinction, including, dominantly solid lesions, relatively lower signal intensity of lesions than that of renal cortex, slowly persistent enhancement, high signal on DWI and low signal on ADC.

Objective To compare the effect of breast conserving surgery and modified radical mastectomy on the clinical efficacy of patients with early breast cancer.Methods CNKI,Chinese Journal Full-text Database (CJFD),China Biology Medicine Disc (CBMdisc),China Dissertation Database (Chinese Dissertation Database,CDDB) google academic and other databases were comprehensive searched.And then the search time was limited to between January 1,2015 and September 1,2017.Key words can be locked for breast conserving surgery,improved surgery for breast surgery,case-control studies,etc.,and then meet the conditions of the literature into the study,for a retrospective analysis.The authors reviewed the literature independently,extracted data and evaluated the risk of bias,and used Review Manager 5.3 software for systematic analysis.Results A total of 1 093 patients with early breast cancer were enrolled in the study.The Meta-analysis showed:there was a significant difference in operation time between the two groups(MD =-30.71,95％ CI:-31.96--29.46,P ＜ 0.01);there was a significant difference in intraoperative blood loss between the two groups(MD =-53.30,95％ CI:-55.38--51.22,P ＜ 0.01);there was a significant difference in postoperative hospital stay (MD =-5.66,95％CI:-7.17--5.17,P ＜0.01) and the incidence of complications (OR =0.30,95％ CI:0.19-0.47,P ＜ 0.01)compared with modified radical mastectomy in early breast cancer patients.There was no significant difference between the two groups in the postoperative recurrence and metastasis (OR =0.78,95％ CI:0.54-1.13,P =0.19).Conclusions In the choice of surgical methods,breast-conserving therapy is better than modified radical surgery,and postoperative recurrence and metastasis rate has no significant difference.