ObjectiveTo understand the seropositivity of neutralizing antibodies (NAb) and low-level NAb against SARS-CoV-2 infection in the community residents, and to explore the impact of COVID-19 vaccination and SARS-CoV-2 infection on the levels of NAb in human serum. MethodsOn the ground of surveillance cohort for acute infectious diseases in community populations in Shanghai, a proportional stratified sampling method was used to enroll the subjects at a 20% proportion for each age group (0‒14, 15‒24, 25‒59, and ≥60 years old). Blood samples collection and serum SARS-CoV-2 NAb concentration testing were conducted from March to April 2023. Low-level NAb were defined as below the 25^th percentile of NAb. ResultsA total of 2 230 participants were included, the positive rate of NAb was 97.58%, and the proportion of low-level NAb was 25.02% (558/2 230). Multivariate logistic regression analysis indicated that age, infection history and vaccination status were correlated with low-level NAb (all P<0.05). Individuals aged 60 years and above had the highest risk of low-level NAb. There was a statistically significant interaction between booster vaccination and one single infection (aOR=0.38, 95%CI: 0.19‒0.77). Compared to individuals without vaccination, among individuals infected with SARS-CoV-2 once, both primary immunization (aOR=0.23, 95%CI: 0.16‒0.35) and booster immunization (aOR=0.12, 95%CI: 0.08‒0.17) significantly reduced the risk of low-level NAb; among individuals without infections, only booster immunization (aOR=0.28, 95%CI: 0.14‒0.52) showed a negative correlation with the risk of low-level NAb. ConclusionsThe population aged 60 and above had the highest risk of low-level NAb. Regardless of infection history, a booster immunization could reduce the risk of low-level NAb. It is recommended that eligible individuals , especially the elderly, should get vaccinated in a timely manner to exert the protective role of NAb.

Objective:To investigate the clinical efficacy of arthroscopic double-row double-pulley technique in the treatment of Ideberg type IA scapular glenoid fracture.Methods:A retrospective case series study was conducted to analyze the clinical data of 16 patients with Ideberg type IA scapular glenoid fracture admitted to Jiading Branch of Shanghai General Hospital from January 2018 to December 2021, including 10 males and 6 females, aged 25-65 years [(42.9±5.1)years]. The patients were treated with arthroscope-assisted reduction and double-row double-pulley technique. The operation time was recorded. Three-dimensional reconstruction of the shoulder joint with CT was performed to assess fracture displacement and healing. Modified University of California Los Angeles (UCLA) score and Constant-Murley score were used to evaluate shoulder function and Visual Analogue Scale (VAS) score was used to evaluate pain before surgery, at 3, 6, 12 months after surgery and at the last follow-up. The complications were observed.Results:All the patients were followed up for 12-36 months [(20.3±4.4)months]. The operation time was 60-90 minutes [(74.7±8.9)minutes]. Three-dimensional construction of the shoulder joint with CT performed at 3 months after surgery showed that there was no fracture re-displacement and all the patients had bone union. The modified UCLA score, Constant-Murley score and VAS score at 3 months after surgery were (30.4±0.4)points, (84.3±1.4)points and 2.0(1.3, 3.0)points, respectively, which were significantly improved compared with those before surgery [(21.1±0.5)points, (56.4±1.3)points and 5.0(5.0, 6.0)points respectively] ( P<0.05). The modified UCLA score, Constant-Murley score and VAS score at 6 months after surgery were (33.1±0.4)points, (91.0±0.5)points and 1.0(1.0, 2.0)]points respectively, which were significantly improved compared with those at 3 months after surgery ( P<0.05). The modified UCLA score, Constant-Murley score and VAS score at 12 months after surgery were (33.5±0.3)points, (92.6±0.6)points and 1.0(0.3, 1.8)points respectively, showing no significant differences from those at 6 months after surgery ( P>0.05). The modified UCLA score, Constant-Murley score and VAS score at the last follow-up were (33.8±0.8)points, (93.7±1.8)points and 1.0(0.0, 1.0)points respectively, with no significant differences from those at 12 months after surgery ( P>0.05). There were no complications such as wound infection, neurovascular injury or shoulder stiffness after surgery. Conclusion:Arthroscopic double-row double-pulley technique for the treatment of Ideberg type IA scapular glenoid fracture has a short operation time, a high fracture healing rate, good shoulder function recovery, and pain relief, with no common complications.

ObjectiveTo evaluate the clinical efficacy of TDP （specific electromagnetic wave） combined with Osteoking in the treatment of knee osteoarthritis of Qi stagnation and blood stasis type. MethodA total of 104 patients with knee osteoarthritis of Qi stagnation and blood stasis type， who received conservative therapy in The Third People's Hospital of Xinjiang Uygur Autonomous Region from July 2019 to December 2021， were randomized into the control group and study group with the random number table method， 52 cases in either group. The control group was treated with TDP， and the study group with TDP and Osteoking. The treatment lasted 1 week for both groups， with 1-month follow-up. Subjective indexes of visual analog scale （VAS） score and Western Ontario McMaster Universities Osteoarthritis Index （WOMAC） score， and objective indexes of visual tenderness index and visual knee range of motion were determined before and after treatment to evaluate the pain and functions of patients. Traditional Chinese medicine （TCM） syndrome score was calculated. The serum erythrocyte sedimentation rate （ESR） and high sensitivity C-reactive protein （hs-CRP） were detected before and after treatment， and the total clinical effective rate was calculated. ResultBefore treatment， the baseline information and all the scores of the two groups were comparable. After treatment， the VAS score， WOMAC score， tenderness index， knee range of motion， and TCM syndrome score were improved in both groups （P<0.01）. After the treatment， the VAS score and WOMAC score of the study group were lower than those of the control group （P<0.01） and the improvement of tenderness index in the study group was better than that in the control group （P<0.05）. The knee range of motion in the study group was better than that in the control group （P=0.061）. The TCM syndrome score of study group was lower than that of control group （P<0.01） after treatment. The post-treatment serum ESR and hs-CRP level in the two groups decreased significantly after treatment， and the study group were lower than those of the control group （P<0.01）. The total clinical effective rate of the study group was 90.4%（47/52）， as compared with the 53.8%（28/52） in the control group （P<0.05）. No obvious adverse events occurred during treatment in both groups. ConclusionThe clinical efficacy of TDP combined with Osteoking in the treatment of knee osteoarthritis of Qi stagnation and blood stasis type is remarkable， which can improve knee pain and functions， alleviate TCM syndrome， and reduce inflammatory indexes， with high safety.

Objective To evaluate the application way and value of autologous succus entericus reinfusion in neonatal enterostomy.Methods Clinical data from 109 neonatal patients receiving enterostomy in Children's Hospital of Nanjing Medical University from January 2010 to December 2017 were retrospectively analyzed.The neonatal patients were divided into two groups according to whether succus entericus reinfusion conducted as succus entericus reinfusion group (63 neonatal patients) and control group (46 neonatal patients).The 90-day weight gain of the neonatal patients,age of the second stage enterostomy closure,cessation of intravenous infusion time after operation and the rate of re-admission before the second stage enterostomy closure were collected.Results The distance between enterostomy mouth and the Treitz ligament was 80-120 cm in all the children patients,and there was no significant difference between the two groups (P=0.42).The succus entericus reinfusion group was superior to the control group in the weight gain of 90 days after birth (single lumen group vs.single lumen control group:[1.97±0.55] vs.[1.50±0.57] kg,P=0.017;double lumens group vs.double lumenscontrol group:[1.82±0.49] vs.[1.48±0.65] kg,P=0.013),age of the second stage enterostomy closure (single lumen group vs.single lumen control group:[115.76± 15.85] vs.[117.40 ± 11.06] d,P =0.025;double lumens group vs.double lumens control group:[115.48± 14.33] vs.[126.03±8.85] d,P=0.001),cessation of intravenous infusion time after operation (single lumen group vs.single lumen control group:[14.24±3.30] vs.[16.40±2.74] d,P=0.046;double lumens group vs.double lumens control group:[15.07±3.65] vs.[18.71±3.63] d,P＜0.01),and the rate of re-admission before the second stage enterostomy closure (single lumen group vs.single lumen control group:9.5％ [2/21] vs.20％ [3/15],P=0.337;double lumens group vs.double lumens control group:7.1％ [3/42] vs.25.8％ [8/31],P =0.028).Conclusion Autologous succus entericus reinfusion can improve the absorption of nutrients after the operation of small intestinal stoma,improve the function of the distal enteral tube,and create conditions for the early recovery of intestinal continuity.

Objective To assess the efficacy and side effects of intravesical instillation of BCG after transurethral resection of the bladder tumor (TURBT) in non-muscle invasive bladder cancer (NMIBC) patients.Methods The clinical data of patients treated with BCG 120 mg per course induced perfusion or more after TURBT from December 2013 to October 2016 in 18 hospitals of northeast China region,were analyzed retrospectively.The first part,data of 106 patients with moderate,high-risk NMIBC were collected.A total of 83 patients were male,while the other 23 patients were female.The average age was 66.7 years old.The clinical staging were T1 in 86(81.1％) cases,Ta in 20(18.9％) cases and carcinoma in situ in 6 (5.7％) patients.Intravesical instillation of BCG was executed after transurethral resection of the bladder tumor.The incidence rate of recurrence and progression during more than 6 months' follow-up time were observed.Multivariate analyses were done by using logistic analysis and Cox proportional hazards regression model with Kaplan-Meier method.The second part,treatment compliance of 276 patients with bladder cancer,including moderate/high-risk NMIBC in 263 cases,moderate/high-risk NMIBC followed with renal pelvis/ureteral carcinoma in 8 cases were and moderate/high-risk NMIBC with renal pelvis/ureteral carcinoma in 5 cases who treated with BCG after the surgeries,were observed.Patients consisted of 211 males and 65 females with average age of 68.3 years.Results With a median follow-up of 12 months,9 (8.5％) patients experienced tumor recurrence and 2 (1.9％) patients were found progression in the first part.The one-year cancer free recurrence rate of the patients was 91.5％.Statistically significant prognostic factors for recurrence identified by multivariable analyses were prior recurrence of the tumors (OR =3.214,95％CI0.804-12.845,P =0.099).In the second port,an incidence rate of adverse effects was 64.1％ (177/276).The Ⅲ/Ⅳ degree complications were occurred in 11 patients and satisfactory outcomes achieved with active treatment.A total of 36 patients withdrawal with the major causes were recurrence and progression of bladder tumor in 12 cases (4.4 ％),9 cases (3.3 ％) with economic reasons and 11 cases (4.0％) with serious complications.Conclusions NMIBC patients treated with intravesical BCG therapy have approving cancer free recurrence rates and acceptable adverse effects.Prior recurrence may be prognostic factor of recurrence after intravesical BCG therapy.

In this paper, we prepared a dual functional system based on dextrin-coated silver nanoparticles which were further attached with iron oxide nanoparticles and cell penetrating peptide (Tat), producing Tat-modified Ag-FeO nanocomposites (Tat-FeAgNPs). To load drugs, an -SH containing linker, 3-mercaptopropanohydrazide, was designed and synthesized. It enabled the silver carriers to load and release doxorubicin (Dox) in a pH-sensitive pattern. The delivery efficiency of this system was assessed using MCF-7 cells, and using null BalB/c mice bearing MCF-7 xenograft tumors. Our results demonstrated that both Tat and externally applied magnetic field could promote cellular uptake and consequently the cytotoxicity of doxorubicin-loaded nanoparticles, with the IC of Tat-FeAgNP-Dox to be 0.63 µmol/L. The delivery efficiency of Tat-FeAgNP carrying Cy5 to the mouse tumor was analyzed using the optical imaging tests, in which Tat-FeAgNP-Cy5 yielded the most efficient accumulation in the tumor (6.7±2.4% ID of Tat-FeAgNPs). Anti-tumor assessment also demonstrated that Tat-FeAgNP-Dox displayed the most significant tumor-inhibiting effects and reduced the specific growth rate of tumor by 29.6% ( = 0.009), which could be attributed to its superior performance in tumor drug delivery in comparison with the control nanovehicles.

The β-sheet peptides can be self-assembled to form different supramolecular solids. The supramolecular solid can be linked to a wide range of functional domains, for example, with cell adhesion sequences, signal domains, and vaccine epitopes to form complex nanostructures, which can be widely used in biomedical fields. In this paper, we mainly reviewed the self-assembly of peptides using β-folding secondary structure to form nanostructures, and discussed the application of nanostructures in drug delivery and tissue engineering.

Aim To investigate the modeling of breast cancer in zebrafish embryos and its related protein expression. Methods 48hpf wild type AB/ TG(Transgenic) zebrafishs were micro-in-jected with breast cancer cell line: MCF-7,T-47D, MDA-MB-231 respectively, the relationship between the number of tumor and model application was investigated, and the number of sub-intestinal veins(SIVs) was detected under confocal microscope, as well as the metastasis of tumor cells in embryos; then the ze-brafish xenografts of MB-231 were co-cultured with tofacitinib/ptk787 for 48 h, optical density(OD) of the cell survival and subintestinal veins(SIVs) were evaluated under confocal micro-scope, and Western blot(WB) analysis was used to test micro-circumstances related protein. Results When the number of in-oculated cells was more than 200 per embryo, xenograft model rate woule be more than 0. 90;MB-231 xenografts showed metas-tasis feature in zebrafish, which could be inhibited by tofacitinib (P < 0. 01), while the number of xenograft MB-231 cells was reduced significantly(P < 0. 01); in another zebrafish xenografts SIVs assay, the tumor could promote the proliferation of SIVs, and 4 mg·L - 1 PTK787 showed inhibiton effect( P < 0. 01). Western blot showed 4d T-47D xenograft zebrafish got more HER2 expression than AB embryos; VEGFa expression in ze-brafish MB-231 model group was higher, and model zebrafish P53 expressi was higher after treated by tofacitinib. Conclusion A zebrafish xenograft model of human brest cancer can be es-tablished, which demonstrates applicability for screening com-pounds in drug discovery studies.

Aim To investigate the anti-angiogenesis and anti-xenograftes of UA in zebrafish larvaes. Meth-ods 24 hour post-fertilization ( hpf ) TG zebrafish was treated with different concentration of UA for 24h, and the number of intersegmental vessels( IVS) were detec-ted under fluorescent microscope respectively;then the models of AB/TG zebrafish xenografts were established by be micro-injected with SMMC-7721 or HT-29 cell at 48hpf respectively, and after cocultured with UA for 48h, optical density (OD) of the SMMC-7721 cell and subintestinal veins ( SIVs) induced by HT-29 were e-valuated under confocal microscope. Results ISV as-say showed that UA could cause IVS missing or disap-perance, inhibition ratio reaching 20. 25% and 26. 65%. UA blocked the spread of SMMC-7721 cells in zebrafish and OD value,and inhibition ratios at three concentrations were 38. 01%, 54. 69%, 61. 88%, re-spectively; in another SIVs assay induced by xeno-grafts, UA at concentration 10 and 15mg·L-1 showed that SIVs were inhibited (P<0. 01) obviously. Con-clusion UA could inhibit the angiogenesis and the growth of SMMC-7721/HT-29 xenografts,and the anti-tumor mechanism may be related with VEGFR2 expres-sion.

OBJECTIVETo explore the relationship between the syndrome types in traditional Chinese medicine (TCM) and serum HBV DNA load in chronic HBV carriers positive for HBeAg.

METHODSAccording to the TCM syndrome types, 185 chronic HBV carriers with HBeAg positivity were classified into single syndrome group (liver Qi depression, kidney Qi deficiency, spleen Qi deficiency, and kidney Yang deficiency), compound syndrome group, and unidentifiable syndrome group; based on the nature of the condition in TCM terms, the patients were classified into excess syndrome group, deficiency syndrome group and comorbidity syndrome group. The serum HBV DNA levels in these cases were analyzed in relation to the TCM syndrome types and disease nature.

RESULTSHBV DNA levels showed no significant difference among the patients with single syndrome, compound syndromes and unidentifiable syndrome (F=0.910, P=0.404), nor among the patients with the 5 different single TCM syndromes (χ²=4.672, P=0.323) or those with different disease nature (F=0.631, P=0.596).

CONCLUSIONSerum HBV DNA level can not be considered as the evidence for syndrome differentiation in chronic HBV carriers with positive HBeAg.

Adolescent ; Adult ; Carrier State ; blood ; diagnosis ; Child ; DNA, Viral ; blood ; Female ; Hepatitis B e Antigens ; blood ; Hepatitis B virus ; genetics ; Hepatitis B, Chronic ; blood ; diagnosis ; virology ; Humans ; Male ; Medicine, Chinese Traditional ; Middle Aged ; Young Adult