Objective:To analyze the current status and related factors of occupational burnout among immunization program staff in Dezhou City in 2025.Methods:From February to March 2025, 1 209 healthcare workers engaged in immunization programs in all disease prevention and control centers (CDCs), vaccination clinics and obstetrics vaccination rooms within the jurisdiction of Dezhou City were enrolled in this study. Basic information was collected via questionnaires. The Maslach Burnout Inventory-General Survey (MBI-GS) was used to assess occupational burnout status across three dimensions: emotional exhaustion, depersonalization and low personal achievement, with severity graded by scores. Multivariate logistic regression models were adopted to analyze the related factors of occupational burnout.Results:Among 1 209 participants, 986 (81.56%) were female and 513 (42.43%) were aged ≥40 years old. About 91 (7.53%) worked in CDCs, 970 (80.23%) in vaccination clinics and 148 (12.24%) in obstetric units. The detection rate of occupational burnout was 83.87% (1 014/1 209), with mild-to-moderate and severe occupational burnout rates of 16.38% (198/1 209) and 67.49% (816/1 209), respectively. Multivariate logistic regression model showed that compared with those who had no intention of resigning, those who frequently had turnover intention ( OR=10.225, 95% CI: 4.093-25.543) had a higher risk of experiencing occupational burnout. Compared with those who slept for more than seven hours a day, those who slept for less than six hours a day ( OR=4.266, 95% CI: 1.773-10.266) and those who slept for 6-7 hours ( OR=1.543, 95% CI: 1.100-2.164) had a higher risk of developing occupational burnout. Conclusion:The detection rate of occupational burnout among immunization program staff in Dezhou City is relatively high, significantly related to frequent turnover intention and insufficient sleep.

Objective To investigate the effects of Nel-like type 1 molecule(NELL-1)on the proliferation and osteogenic differenti-ation of stem cells from human exfoliated deciduous teeth(SHEDs).Methods SHEDs was isolated,cultured,and identified.The third generation SHEDs were used for subsequent experiments.SHEDs were divided into 4 groups,and NELL-1 was added to each group at concentrations of 0(control group),50,100,and 200 ng/mL.Cell activity was measured by CCK-8 assay and crystal violet staining.The changes in osteogenic ability were detected by alkaline phosphatase activity.The expression levels of osteogenesis-related genes ALP,OCN and Runx-2 by RT-qPCR were detected.Western blot was used to detect the expression of osteogenesis-related pro-teins ALP,Runx-2 and Col-Ⅰ.Results SHEDs exhibited stem cell characteristics,and 50 ng/mL of NELL-1 protein had a promo-ting effect on SHEDs proliferation(P＜0.01).Alkaline phosphatase activity assay showed that after the addition of NELL-1,the osteo-genic effect of each group was better than that of the control group and 50 ng/mL of NELL-1 was the best(P＜0.05).RT-qPCR and Western blot results showed that 50 ng/mL of NELL-1 significantly promoted the expression of osteoblast-related genes including ALP,OCN and Runx-2 and the protein expression of ALP,Runx-2 and Col-Ⅰ(P＜0.05).Conclusion NELL-1 can promote the prolifera-tion and osteogenic differentiation of SHEDs.

Objective:To analyze the current status and related factors of occupational burnout among immunization program staff in Dezhou City in 2025.Methods:From February to March 2025, 1 209 healthcare workers engaged in immunization programs in all disease prevention and control centers (CDCs), vaccination clinics and obstetrics vaccination rooms within the jurisdiction of Dezhou City were enrolled in this study. Basic information was collected via questionnaires. The Maslach Burnout Inventory-General Survey (MBI-GS) was used to assess occupational burnout status across three dimensions: emotional exhaustion, depersonalization and low personal achievement, with severity graded by scores. Multivariate logistic regression models were adopted to analyze the related factors of occupational burnout.Results:Among 1 209 participants, 986 (81.56%) were female and 513 (42.43%) were aged ≥40 years old. About 91 (7.53%) worked in CDCs, 970 (80.23%) in vaccination clinics and 148 (12.24%) in obstetric units. The detection rate of occupational burnout was 83.87% (1 014/1 209), with mild-to-moderate and severe occupational burnout rates of 16.38% (198/1 209) and 67.49% (816/1 209), respectively. Multivariate logistic regression model showed that compared with those who had no intention of resigning, those who frequently had turnover intention ( OR=10.225, 95% CI: 4.093-25.543) had a higher risk of experiencing occupational burnout. Compared with those who slept for more than seven hours a day, those who slept for less than six hours a day ( OR=4.266, 95% CI: 1.773-10.266) and those who slept for 6-7 hours ( OR=1.543, 95% CI: 1.100-2.164) had a higher risk of developing occupational burnout. Conclusion:The detection rate of occupational burnout among immunization program staff in Dezhou City is relatively high, significantly related to frequent turnover intention and insufficient sleep.

Objective To investigate the effects of Nel-like type 1 molecule(NELL-1)on the proliferation and osteogenic differenti-ation of stem cells from human exfoliated deciduous teeth(SHEDs).Methods SHEDs was isolated,cultured,and identified.The third generation SHEDs were used for subsequent experiments.SHEDs were divided into 4 groups,and NELL-1 was added to each group at concentrations of 0(control group),50,100,and 200 ng/mL.Cell activity was measured by CCK-8 assay and crystal violet staining.The changes in osteogenic ability were detected by alkaline phosphatase activity.The expression levels of osteogenesis-related genes ALP,OCN and Runx-2 by RT-qPCR were detected.Western blot was used to detect the expression of osteogenesis-related pro-teins ALP,Runx-2 and Col-Ⅰ.Results SHEDs exhibited stem cell characteristics,and 50 ng/mL of NELL-1 protein had a promo-ting effect on SHEDs proliferation(P＜0.01).Alkaline phosphatase activity assay showed that after the addition of NELL-1,the osteo-genic effect of each group was better than that of the control group and 50 ng/mL of NELL-1 was the best(P＜0.05).RT-qPCR and Western blot results showed that 50 ng/mL of NELL-1 significantly promoted the expression of osteoblast-related genes including ALP,OCN and Runx-2 and the protein expression of ALP,Runx-2 and Col-Ⅰ(P＜0.05).Conclusion NELL-1 can promote the prolifera-tion and osteogenic differentiation of SHEDs.

As an emerging drug delivery technology,microneedles can puncture the skin's stratum corneum to create micron-sized conduits,painlessly,minimally invasive,and efficiently deliver drugs into viable epidermis or dermis for local or systemic therapeutic effects.This paper reviews the current clinical trials of microneedles used in the treatment of various diseases,elaborates on the characteristics of various types of microneedles,and summarizes the latest research progress of microneedles used to treat skin tumors,including chemotherapy,photothermal and photodynamic therapy,immunotherapy,gene therapy,and combination therapy.This review provides ideas and directions for further research on microneedles in treating skin tumors.

Objective:To investigate whether it is by regulating interleukin 1β ( IL-1β) gene expression that androgen receptor (AR) in macrophages affects hyperphosphate-induced vascular smooth muscle cell calcification. Methods:The chromatin immunoprecipitation (ChIP) experiment was used to determine whether AR was bound to the androgen receptor element (ARE) sequence of IL-1β promoter in THP-1 cells. Whether the AR regulated IL-1β gene expression was detected by luciferase assay experiments. AR of THP-1 cells was silenced and transfected by lentivirus with vector or shRNA. Flow cytometry was used to select positive transfected cells THP-1ARsc (control) and THP-1ARsi (AR silencing) with fluorescent markers. Western blotting was used to detect AR protein levels of THP-1ARsc (control) and THP-1ARsi cells (AR silencing in monocytes). Macrophages MФARsc (control) or MФARsi (AR silencing) were induced by 50 ng/ml phorbol ester. Enzyme-linked immunosorbent assay was used to detect IL-1β expression levels of MФARsc or MФARsi conditioned medium. The human aortic smooth muscle cells (HASMC) were cultured in MФARsc or MФARsi conditioned medium with phosphate (2.5 mmol/L final concentration of sodium dihydrogen phosphate), and Alizarin red S staining was used to analyze HASMC calcification degree. Western blotting was used to detect the expression levels of RUNX2 (osteoblast marker) and SM22α (HASMC marker), and neutralization assay was performed to test IL-1β-mediating effect of macrophages AR on HASMC calcification. Results:AR was bound to ARE sequence of IL-1β promoter and regulated IL-1β gene expression. The expression level of IL-1β protein in conditioned medium of MФARsi cells decreased significantly compared to MФARsc cells ( P<0.001). Compared with MФARsc conditioned medium group, HASMC calcium deposition in MФARsi conditioned medium group decreased significantly, RUNX2 protein decreased and SM22α protein increased (all P<0.05). The degree of HASMC calcification in the MФARsi conditioned medium+IgG antibody group decreased than that in the MФARsc conditioned medium+IgG antibody group significantly, and the degree of HASMC calcification in the MФARsc conditioned medium+IL-1β antibody group decreased significantly than that in the MФARsc conditioned medium+IgG antibody group; while the degree of HASMC calcification in the MФARsi conditioned medium+IgG antibody group and MФARsi conditioned medium+IL-1β antibody group decreased than that in the MФARsc conditioned medium+IL-1β antibody group (all P<0.05). Conclusions:Macrophage AR regulates IL-1β expression by binding to ARE sequence within IL-1β promoter, and IL-1β mediates the effect of macrophage AR on hyperphosphate-induced HASMC calcification.

Objective:To investigate the efficacy and safety of cortical-sparing adrenalectomy (CSA) in the treatment of bilateral pheochromocytoma.Methods:The clinical data of 20 patients with bilateral pheochromocytoma treated in Xiangya Hospital of Central South University from January 2004 to December 2019 were analyzed retrospectively, including 10 males and 10 females. The average age of onset was 32.5 (8-51) years. 3 cases had a family history of pheochromocytoma. There were 14 and 6 patients with bilateral synchronous and metachronous onset, respectively. The mean value of vanilmandelic acid (VMA) in 20 cases was (106.4 ± 60.0) μ mol/24h. Preoperative enhanced CT showed a soft tissue mass with uneven enhancement in the adrenal region, with low-density necrosis, which suggested the diagnosis of Pheochromocytoma. All 20 cases underwent CSA under general anesthesia. In 14 cases of bilateral synchronous disease, 9 cases underwent simultaneous operation and 5 cases underwent staged operation; 6 patients with metachronous disease underwent bilateral tumor resection successively. Laparoscopic surgery was performed in 18 cases and open surgery in 2 cases. Through the abdominal or retroperitoneal approach, open the fat capsule around the upper pole of the kidney, free the medial edge of the upper pole of the kidney, expose the adrenal gland and tumor, completely remove the tumor and capsule, ensure that the adrenal tissue is 3-5 mm away from the cutting edge of the tumor, and the reserved cortical size is at least 1 / 3 of the ipsilateral adrenal gland. The central adrenal vein was preserved as much as possible to reduce the damage to the adrenal vascular bed. The operation related data, intraoperative monitoring records, postoperative complications and long-term follow-up results were recorded.Results:All the 20 cases were successfully completed without tumor rupture. The operation time of simultaneous operation and staged operation were (242.3 ± 61.0) min and (137.9 ± 60.3) min, respectively. The number of patients admitted to ICU after operation was 7 and 2, respectively ( P<0.05); The intraoperative bleeding volume was (528.6 ± 355.7) ml and (277.8 ± 264.7) ml, the number of blood transfusion cases were 5 and 2 cases, and the average hospital stay was (7.4 ± 2.0) d and (7.8 ± 3.3) d, respectively ( P>0.05). 20 cases took glucocorticoid orally (prednisone 5 mg, once every 12 hours) after operation. There was no obvious manifestation of adrenocortical dysfunction and Addison's crisis. The hormone was stopped gradually from 2 weeks to 1 month after operation. The average follow-up was 5.4 (1.0-16.0) years. There were 3 cases of recurrence and no metastasis. Gene detection was performed in 10 cases after operation, and 7 cases carried pheochromocytoma RET and VHL pathogenic gene mutations (RET in 2 cases and VHL in 5 cases). Conclusion:Although CSA has a certain risk of recurrence, it avoids hormone replacement and does not increase the risk of metastasis and death. It is recommended for the treatment of hereditary pheochromocytoma, especially bilateral pheochromocytoma.

OBJECTIVE：To optimize the f ormulation of docetaxel （DTX）-mPEG-PLGA-mPEG （PELGE）-nanoparticles （NPs），and to characterize it and evaluate its in vitro drug release and antitumor activity. METHODS ：PELGE were synthesized by ring-opening polymerization. DTX-PELGE-NPs were prepared by using emulsion solvent evaporation method. The content of DTX in DTX-PELGE-NPs was determined by HPLC. Box-Behnken design-response surface methodology was applied to optimize the formulation of the nanoparticles using the amount of DTX ，PELGE and poloxamer 188 as independent variable ，using entrapped efficiency as dependent variable. The particle size and Zeta-potential of DTX-PELGE-NPs were characterized by laser particle size analyzer and transmission electron microscope. The in vitro release of the DTX-PELGE-NPs was investigated by ultra-filtered centrifugation，using DTX injection as reference. In vitro cytotoxicity of the DTX-PELGE-NPs was investigated by MTT assay ， using DTX and PELGE-NPs without DTX as reference . RESULTS ：The optimal formulation included 2.80 mg DTX ，20.60 mg PELGE and 6％ poloxamer 188. The entrapped efficiency of optimized DTX-PELGE-NPs was （86.79±1.32）％；drug-loading amount was （10.21±0.78）％，and average particle size was （78.4±2.9）nm；polydispersity coeffici ent was （0.187±0.018）and Zeta potential was （－20.6±1.5）mV. Furthermore ，DTX- PELGE-NPs showed a regular spherical and uniform distribution under scanning electron microscopy. Compared with DTXinjection（accumulative release rate of 92.3％ at 4 h），DTX- PELGE-NPs had a significant sustained-release effect （accumu-lative release rate of 78.6％ at 36 h）. 0.1-50 μg/mL PELGE-NPs had no obvious cytotoxicity to human breast cancer cells MCF-7（P＞0.05）. 0.5-10 μg/mL DTX-PELGE-NPs could significantly inhibit the growth of human breast cancer cells MCF-7， and its inhibitory effect （except for DTX-PELGE-NPs 10 μg/mL group）was significantly stronger than that of DTX injection （P＜ 0.05）. CONCLUSIONS ：The optimized formulation is stable and feasible. The obtained DTX-PELGE-NPs not only have uniform particle size ，high encapsulation rate obvious slow-release effect ，but also have stronger anti-tumor effect in vitro than DTX injection.

Objective To explore the effects of NF-E2-related factor 2 (Nrf2) overexpression on mitochondrial biosynthesis and function in melanocytes.Methods An immortalized human vitiligo melanocyte cell line PIG3V was used in this study.An overexpression plasmid Nrf2-pEX-1 containing the full-length Nrf2 gene was constructed.PIG3V cells were divided into 3 groups:blank group receiving no treatment,control group transfected with the pEX-1 plasmid,overexpression group transfected with the Nrf2-pEX-1 plasmid.After transfection,real-time quantitative reverse transcription-PCR (RT-PCR) and Western blot were performed to determine the mRNA and protein levels of mitochondrial biosynthesis-related factors (including Nrf2,nuclear respiratory factor 1 (NRF1) and mitochondrial transcription factor A (TFAM)) respectively;RT-PCR was also conducted to measure the copy number of mitochondrial DNA (mtDNA),and flow cytometry to estimate mitochondial membrane potential (MMP);luciferase reporter system was used to estimate the intracellular adenosine triphosphate (ATP) level.Statistical analysis was carried out by using a two-sample t-test.Results After transfection,a significant increase was observed in the mRNA expression levels of Nrf2 and NRF1 at 24 hours (both P ＜ 0.001) and in those of Nrf2 and TFAM at 48 hours (both P ＜ 0.05),but no significant change was noted in the mRNA expression level of TFAM at 24 hours (P ＞ 0.05) or in that of NRF1 at 48 hours (P ＞0.05) in the overexpression group compared with the control group.In the case of Nrf2,NRF1 and TFAM protein levels,the overexpression group showed significant increases compared with the control group at 48 hours after transfection (all P ＜ 0.05),while no significant difference was noted between the two groups at 24 hours.Compared with the control group,MMP in the overexpression group increased by 2.313％ at 24 hours (t =5.546,P =0.005) and by 14.872％ at 48 hours (t =8.537,P =0.001) after transfection.Both the relative copy number of mtDNA and ATP level were similar between the overexpression group and control group at 24 hours after transfection (both P ＞ 0.05),but significantly higher in the overexpression group than in the control group at 48 hours (t =5.760,P =0.005;t =22.040,P =0.008).Conclusion Up-regulation of Nrf2 pathway can improve mitochondrial function and biosynthesis in PIG3V cells likely by promoting the expressions of mitochondrial biosynthesis-related genes and proteins.

Objective:To evaluate the feasibility and safety of laparoscopic jejunostomy with central venous catheterization set (CVC, Arrow International Inc., USA) during the operation of totally minimally invasive Ivor-Lewis esophagectomy (MIIE). Methods:The clinical data of 88 patients with esophageal squamous cell carcinoma who were admitted to the Fudan University Cancer Hospital from February 2013 to April 2014 were retrospectively analyzed. Among them, 48 patients with early mid-lower esophageal cancer un-derwent laparoscopic jejunostomy with CVC, and 40 patients accepted nasogastric tube nutrition. Short-term clinical outcomes were collected. Results:No significant difference in nutrition index was found between the two groups, but the rate of unplanned extubation in the laparoscopic jejunostomy with CVC group was less than that in the nasogastric tube nutrition group. Conclusion:Laparoscopic jejunostomy with CVC set is a safe and feasible technique. It is potentially accepted as an optional approach in MIIE for post-operative nutrition support.