OBJECTIVES: To investigate the therapeutic mechanism of Danzhi Jiangtang Capsule (DZJTC) for repairing renal vascular endothelial injury in rats with diabetic nephropathy (DN). METHODS: Fifty male SD rat models of DN, established by left nephrectomy, high-sugar and high-fat diet and streptozotocin injection, were randomized into DN model group, low-, medium-, and high-dose DZJTC treatment groups, and DAPT (a γ-secretase inhibitor) treatment group, with 10 rats with normal feeding as the control group. DZJTC was administered by daily gavage at 0.315, 0.63, or 1.26 g/kg, and DAPT (20 mg/kg, dissolved in 50% CMC-Na solution) was given by gavage every other day for 4 weeks; normal saline was given in the control and model groups. After treatment, the levels of creatinine (CRE), blood urea nitrogen (BUN), and microalbuminuria (mALB) were detected with ELISA, and renal pathologies were observed by transmission electron microscopy. Renal expressions of vascular endothelial growth factor (VEGF) and endothelin-1 (ET-1) were measured by immunohistochemistry, and the protein expressions of CD31 and Notch signaling pathway components were detected using Western blotting. RESULTS: The rat models of DN showed significantly increased CRE, BUN, and mALB levels, obvious renal pathologies under electron microscopy, increased renal VEGF, ET-1 and CD31 expressions, and upregulated Notch1, NICD, and MAML1 protein levels. Treatment with DZJTC at the 3 doses and DAPT significantly reduced CRE, BUN, and mALB levels, improved renal pathology, decreased VEGF, ET-1 and CD31 expressions, and lowered Notch1, NICD and MAML1 levels, and the effects were the most pronounced with high-dose DZJTC. CONCLUSIONS DZJTC ameliorates hyperproliferation and dysfunction of renal vascular endothelium in DN rats possibly by regulating renal VEGF and ET-1 levels via inhibiting NICD- and MAML1-mediated Notch signaling pathway.
Animals ; Male ; Drugs, Chinese Herbal/therapeutic use* ; Rats ; Rats, Sprague-Dawley ; Signal Transduction/drug effects* ; Diabetic Nephropathies/drug therapy* ; Receptor, Notch1/metabolism* ; Kidney/blood supply* ; Diabetes Mellitus, Experimental ; Down-Regulation ; Endothelium, Vascular/metabolism* ; Nuclear Proteins/metabolism*

Tongue squamous cell carcinoma (TSCC) is a prevalent malignancy that afflicts the head and neck area and presents a high incidence of metastasis and invasion. Accurate diagnosis and effective treatment are essential for enhancing the quality of life and the survival rates of TSCC patients. The current treatment modalities for TSCC frequently suffer from a lack of specificity and efficacy. Nanoparticles with diagnostic and photothermal therapeutic properties may offer a new approach for the targeted therapy of TSCC. However, inadequate accumulation of photosensitizers at the tumor site diminishes the efficacy of photothermal therapy (PTT). This study modified gold nanodots (AuNDs) with the TSCC-targeting peptide HN-1 to improve the selectivity and therapeutic effects of PTT. The Au-HN-1 nanosystem effectively targeted the TSCC cells and was rapidly delivered to the tumor tissues compared to the AuNDs. The enhanced accumulation of photosensitizing agents at tumor sites achieved significant PTT effects in a mouse model of TSCC. Moreover, owing to its stable long-term fluorescence and high X-ray attenuation coefficient, the Au-HN-1 nanosystem can be used for fluorescence and computed tomography imaging of TSCC, rendering it useful for early tumor detection and accurate delineation of surgical margins. In conclusion, Au-HN-1 represents a promising nanomedicine for imaging-based diagnosis and targeted PTT of TSCC.
Tongue Neoplasms/diagnostic imaging* ; Carcinoma, Squamous Cell/diagnostic imaging* ; Animals ; Gold/chemistry* ; Mice ; Photothermal Therapy/methods* ; Tomography, X-Ray Computed ; Photosensitizing Agents ; Metal Nanoparticles ; Humans ; Cell Line, Tumor

OBJECTIVE To investigate the management status of small pressure steam sterilizers in dental institu-tions across seven major regions of China and provide references for establishing standardized monitoring and eval-uation protocols for sterilization efficacy.METHODS From Aug.to Nov.2023,a convenience sampling method was employed to select 885 dental institutions of various levels from seven geographical regions.An online survey using a self-designed questionnaire was conducted to assess the management status of small pressure steam steri-lizers in dental institutions.RESULTS A total of 885 questionnaires were distributed,with 770 valid responses col-lected,covering 770 dental institutions at all levels.The survey involved 2 056 small pressure steam sterilizers,of which 43.14％were pre-vacuum type and 89.40％were benchtop models.Tertiary dental institutions had the high-est proportion of imported small pressure steam sterilizers(60.15％),with most devices in use for 5-10 years(36.88％).Secondary and low er-level institutions predominantly used domestically produced small pressure steam sterilizers(74.60％),which used for 3-5 years accounting for the highest proportion(34.29％).While 85.58％of dental institutions employed dedicated sterilization personnel,only 45.84％performed proper maintenance for small pressure steam sterilizers.Training rates were 80.00％for department of stomatology in ungraded general hospitals and primary medical institutions,76.19％in prejob and 71.43％during the work for department of sto-matology in primary clinics,respectively.CONCLUSIONS Although most dental institutions demonstrate sound policy formulation,challenges persist in equipment maintenance,policy implementation and grassroots training.Future efforts should be made on strengthening maintenance and inspection of equipment,enhancing sys-tem supervisory mechanisms,and optimizing training systems to ensure dental treatment safety.

Objective To investigate the therapeutic mechanism of Danzhi Jiangtang Capsule(DZJTC)for repairing renal vascular endothelial injury in rats with diabetic nephropathy(DN).Methods Fifty male SD rat models of DN,established by left nephrectomy,high-sugar and high-fat diet and streptozotocin injection,were randomized into DN model group,low-,medium-,and high-dose DZJTC treatment groups,and DAPT(a γ-secretase inhibitor)treatment group,with 10 rats with normal feeding as the control group.DZJTC was administered by daily gavage at 0.315,0.63,or 1.26 g/kg,and DAPT(20 mg/kg,dissolved in 50%CMC-Na solution)was given by gavage every other day for 4 weeks;normal saline was given in the control and model groups.After treatment,the levels of creatinine(CRE),blood urea nitrogen(BUN),and microalbuminuria(mALB)were detected with ELISA,and renal pathologies were observed by transmission electron microscopy.Renal expressions of vascular endothelial growth factor(VEGF)and endothelin-1(ET-1)were measured by immunohistochemistry,and the protein expressions of CD31 and Notch signaling pathway components were detected using Western blotting.Results The rat models of DN showed significantly increased CRE,BUN,and mALB levels,obvious renal pathologies under electron microscopy,increased renal VEGF,ET-1 and CD31 expressions,and upregulated Notch1,NICD,and MAML1 protein levels.Treatment with DZJTC at the 3 doses and DAPT significantly reduced CRE,BUN,and mALB levels,improved renal pathology,decreased VEGF,ET-1 and CD31 expressions,and lowered Notch1,NICD and MAML1 levels,and the effects were the most pronounced with high-dose DZJTC.Conclusion DZJTC ameliorates hyperproliferation and dysfunction of renal vascular endothelium in DN rats possibly by regulating renal VEGF and ET-1 levels via inhibiting NICD-and MAML1-mediated Notch signaling pathway.

Objective:To investigate the rate-limiting steps of hand-assisted laparoscopic donor nephrectomy, analyze the relevant factors affecting surgical difficulty, and subsequently construct a mathematical model to predict the difficulty of the procedure preoperatively.Methods:A retrospective study was conducted on 100 kidney donors who underwent hand-assisted laparoscopic donor nephrectomy performed by the same surgeon at Beijing Friendship Hospital, Capital Medical University from January 2021 to January 2024. Preoperative demographic data, imaging findings, general condition, donor kidney size, and postoperative complications were collected and analyzed. The surgeon′s subjective rating (1-3 points) was used as a quantitative measure of surgical difficulty. ANOVA and Chi-square tests were employed to explore the differences in postoperative complications, recovery, operative time, and intraoperative blood loss among groups with varying levels of difficulty. The main procedure was divided into four steps (excluding abdominal closure): Trocar placement, renal hilar dissection, perinephric dissection, and kidney retrieval. The time for each step and the total operative time were recorded. Pearson correlation test was used to analyze the relationship between each step and the total operative time, and ANOVA test was used to assess the time differences between steps and to determine if the time for the same step varied across different difficulty subgroups, thereby identifying the rate-limiting step of hand-assisted laparoscopic donor nephrectomy. In terms of the risk factors influencing the difficulty of surgery, Pearson and Spearman correlation tests were used to investigate the relationship between preoperative donor data and surgical difficulty scores, and a predictive model was constructed using multiple linear regression. Finally, the model was internally and externally validated to confirm its accuracy and effectiveness.Results:As the surgical difficulty increased (groups 1, 2, and 3), the postoperative drainage tube duration was correspondingly prolonged [(5.92±1.48) d, (8.00±1.75) d, and (11.88±4.45) d, respectively, P<0.05], and the severity of postoperative complications also significantly increased (the incidence of Clavien-Dindo grade ≥2 was 5.66%, 31.82% and 64.00%, respectively, P<0.01). In the analysis of rate-limiting steps, the time taken for all steps, except for Trocar placement, showed significant differences among the difficulty subgroups ( P<0.001). However, the average time for renal hilar dissection was (19.82±5.65) min, which was significantly longer than the other steps ( P<0.001). Therefore, renal hilar dissection was identified as the rate-limiting step of hand-assisted laparoscopic donor nephrectomy. In terms of the influencing factors of surgical difficulty, donor obesity, kidney width, abdominal anteroposterior sagittal diameter, number of renal arteries, distance from renal artery bifurcation to the abdominal aorta, degree of renal artery calcification, and mayo adhesive probability (MAP) score were all correlated with the surgical difficulty score ( P<0.05). However, multiple linear regression analysis revealed that only the number of renal arteries and the MAP score were the independent risk factors for higher surgical difficulty of hand-assisted laparoscopic donor nephrectomy. The predictive equation was: surgical difficulty=0.649×number of renal arteries+ 0.770×MAP score. Both internal and external validation confirmed the model's good accuracy. Conclusions:This study established a reliable and objective predictive model for the difficulty of hand-assisted laparoscopic donor nephrectomy based on the number of renal arteries and the MAP score. Renal hilar dissection was identified as the rate-limiting step of the procedure. This provides a reference for selecting an appropriate surgeon based on the predicted surgical difficulty.

Elderly patients are a crucial population for medical treatment and referral.The establishment of standardized and efficient referral channels is essential for enhancing the referral process, improving treatment outcomes for the elderly, and optimizing the allocation of medical resources.Referral network analysis examines the integrity, structure, and dynamics of referrals to infer the characteristics of the network.This can offer insights for enhancing referral policies and elevating medical service standards.While existing research predominantly concentrates on referral networks within the general population, there is a noticeable gap in studies focusing on elderly patients.This review article assesses domestic and international research on networks formed between medical institutions or physicians through patient referrals, aiming to inform and enhance referral policies in our country.

Objective To study the impact of tympanic membrane opening on respiratory-driven middle ear pressure in patients with patulous eustachian tube(PET),using a simplified in vitro model.Methods CT imaging data from a PET patient(with full-length eustachian tube opening observed during a Valsalva maneuver followed by breath-holding)were used to design a simplified eustachian tube model.Two simplified in vitro models of the eusta-chian tube were constructed using silicone-based 3D printing technology and connected to a pressure controller and pressure sensors.The pressure controller was activated to introduce negative-pressure airflow into the nasopharyn-geal model to simulate respiratory-induced middle ear pressure fluctuations.A hemostat was used to alternately open and close the external interface of the middle ear chamber,simulating conditions of an open and intact tympanic membrane,while middle ear pressure was continuously monitored using pressure sensors.Results In the first mod-el,with-800 mbar negative pressure applied at the nasopharynx,the middle ear pressure stabilized between-3.9 mbar and-4.3 mbar with tympanic membrane opening,and between-7.9 mbar and-8.2 mbar with intact tym-panic membrane.In the second model,under the same pressure setting,middle ear pressure stabilized between-2.7 mbar and-3.1 mbar with tympanic membrane opening,and between-5.0 mbar and-7.7 mbar with intact tympanic membrane.Conclusion This study,based on a simplified in vitro model,demonstrates that tympanic membrane opening can effectively reduce respiratory-driven pressure in the middle ear.This phenomenon may partly explain the clinical efficacy of tympanostomy tube insertion in certain PET patients.

Objective To study the impact of tympanic membrane opening on respiratory-driven middle ear pressure in patients with patulous eustachian tube(PET),using a simplified in vitro model.Methods CT imaging data from a PET patient(with full-length eustachian tube opening observed during a Valsalva maneuver followed by breath-holding)were used to design a simplified eustachian tube model.Two simplified in vitro models of the eusta-chian tube were constructed using silicone-based 3D printing technology and connected to a pressure controller and pressure sensors.The pressure controller was activated to introduce negative-pressure airflow into the nasopharyn-geal model to simulate respiratory-induced middle ear pressure fluctuations.A hemostat was used to alternately open and close the external interface of the middle ear chamber,simulating conditions of an open and intact tympanic membrane,while middle ear pressure was continuously monitored using pressure sensors.Results In the first mod-el,with-800 mbar negative pressure applied at the nasopharynx,the middle ear pressure stabilized between-3.9 mbar and-4.3 mbar with tympanic membrane opening,and between-7.9 mbar and-8.2 mbar with intact tym-panic membrane.In the second model,under the same pressure setting,middle ear pressure stabilized between-2.7 mbar and-3.1 mbar with tympanic membrane opening,and between-5.0 mbar and-7.7 mbar with intact tympanic membrane.Conclusion This study,based on a simplified in vitro model,demonstrates that tympanic membrane opening can effectively reduce respiratory-driven pressure in the middle ear.This phenomenon may partly explain the clinical efficacy of tympanostomy tube insertion in certain PET patients.

OBJECTIVE To investigate the management status of small pressure steam sterilizers in dental institu-tions across seven major regions of China and provide references for establishing standardized monitoring and eval-uation protocols for sterilization efficacy.METHODS From Aug.to Nov.2023,a convenience sampling method was employed to select 885 dental institutions of various levels from seven geographical regions.An online survey using a self-designed questionnaire was conducted to assess the management status of small pressure steam steri-lizers in dental institutions.RESULTS A total of 885 questionnaires were distributed,with 770 valid responses col-lected,covering 770 dental institutions at all levels.The survey involved 2 056 small pressure steam sterilizers,of which 43.14％were pre-vacuum type and 89.40％were benchtop models.Tertiary dental institutions had the high-est proportion of imported small pressure steam sterilizers(60.15％),with most devices in use for 5-10 years(36.88％).Secondary and low er-level institutions predominantly used domestically produced small pressure steam sterilizers(74.60％),which used for 3-5 years accounting for the highest proportion(34.29％).While 85.58％of dental institutions employed dedicated sterilization personnel,only 45.84％performed proper maintenance for small pressure steam sterilizers.Training rates were 80.00％for department of stomatology in ungraded general hospitals and primary medical institutions,76.19％in prejob and 71.43％during the work for department of sto-matology in primary clinics,respectively.CONCLUSIONS Although most dental institutions demonstrate sound policy formulation,challenges persist in equipment maintenance,policy implementation and grassroots training.Future efforts should be made on strengthening maintenance and inspection of equipment,enhancing sys-tem supervisory mechanisms,and optimizing training systems to ensure dental treatment safety.