Study on the synergistic effect and mechanism of curcumin combined with zerumbone on the biological behavior of non-small cell lung cancer cells / 中国药房

OBJECTIVE To investigate the synergistic effect and mechanism of curcumin （CUR） combined with zerumbone （ZER） on the biological behavior of non-small cell lung cancer （NSCLC） A549 cells. METHODS CCK-8 method and Gin’s formula were used to screen the optimal concentration combination for synergistic effect after the combination of CUR and ZER. The cells were divided into blank group， CUR group， ZER group， and CUR+ZER group. Flow cytometry was used to evaluate cell apoptosis， and clone formation experiment was used to evaluate cell proliferation ability， scratch experiment and Transwell migration experiment were used to evaluate cell migration ability， and Transwell invasion experiment was used to evaluate cell invasion ability. Western blot assay was used to detect the protein expressions of phosphorylated phosphatidylinositol-3-kinase （p- PI3K）， phosphorylated protein kinase B （p-Akt）， and vascular endothelial growth factor A （VEGF-A）. RESULTS The half inhibitory concentrations of CUR and ZER on A549 cells were approximately 16 and 12 μmol/L， respectively； the drug combination of CUR 8 μmol/L+ZER 6 μmol/L had the highest efficiency enhancement index， with the cell proliferation inhibition rate of （77.41±4.16）%， indicating the most significant synergistic effect. Compared with the CUR and ZER groups， the cell apoptosis rate in the CUR+ZER group was significantly increased （P＜0.01）， while the cell clone formation rate， cell migration rate， the number of migrating cells， the number of invading cells， and relative expression levels of p-PI3K， p-Akt， and VEGF-A proteins in the cells were significantly reduced （P＜0.05 or P＜0.01）. CONCLUSIONS The combination of CUR and ZER has a synergistic effect， significantly promoting the apoptosis of NSCLC cells， and inhibiting cell proliferation， migration， and invasion. Its potential mechanism may be closely related to the inhibition of the PI3K/Akt signaling pathway， thereby down-regulating the protein expression of VEGF-A.

The design method of the digital sequential tooth-sectioning guide for the extraction of mandibular impacted third molars / 中华口腔医学杂志

Objective: To explore a method for digitally designing and fabricating a sequential tooth-sectioning guide that can assist in the extraction of mandibular horizontal impacted third molars, preliminarily evaluate its feasibility and provide a reference for clinical application. Methods: Twenty patients with mandibular low level impacted third molars who visited the Department of General Dentistry, Peking University School and Hospital of Stomatology from March 2021 to January 2022 were selected. Cone-beam CT showed direct contact between the roots and mandibular canal, and full range impressions of the patients' intraoral teeth were taken and optical scans of the dental model were performed. The patients' cone-beam CT data and optical scan data were reconstructed in three dimensions, anatomical structure extraction, registration fusion, and the design of the structure of the guide (including crown-sectioning guide and root-sectioning guide) by Mimics 24.0, Geomagic Wrap 2021, and Magics 21.0 software, and then the titanium guide was three dimension printed, and the guide was tried on the dental model. After confirmation, the guide was used to assist the dentist in the operation. We observed whether the guide was in place, the number of tooth splitting, the matching of tooth splitting with the preoperative design, the operation time, and whether there were any complications. Results: In this study, 20 sectioning guides were successfully printed, all of them were well fitted in the patients' mouth, the average number of section was 3.4 times, the tooth parts was better matched with the preoperative design, and the average operative time of the guides was (29.2±9.8) minutes without complications such as perforation of the bone cortex. Conclusions: The use of sequential sectioning guides to assist in the extraction of mandibular impacted third molars was initially validated to accurately replicate the preoperative sectioning design, and is expected to provide a digital solution to improve surgical precision and ensure safety. Further studies with larger sample sizes are needed to evaluate its accuracy and safety.

Radix Panacis quinquefolii Extract Ameliorates Inflammatory Bowel Disease through Inhibiting Inflammation / 中国结合医学杂志

OBJECTIVE@#To investigate the anti-inflammatory activity of Radix Panacis quinguefolii root extract (RPQE) and its therapeutic effects on inflammatory bowel disease (IBD).@*METHODS@#The 72-hour post-fertilization zebrafish was used to generate the local and systematic inflammation models through tail-amputation and lipopolysaccharide (LPS)-induction (100 µ g/mL), respectively. The Tg(zlyz:EGFP) zebrafish was induced with 75 µ g/mL 2,4,6-trinitrobenzene sulfonic acid (TNBS) for establishing the IBD model. The tail-amputated, LPS-, and TNBS-induced models were subjected to RPQE (ethanol fraction, 10-20 µ g/mL) administration for 12 and 24 h, respectively. Anti-inflammatory activity of RPQE was evaluated by detecting migration and aggregation of leukocytes and expression of inflammation-related genes. Meanwhile, TNBS-induced fish were immersed in 0.2% (W/V) calcein for 1.5 h and RPQE for 12 h before photographing to analyze the intestinal efflux efficiency (IEE). Moreover, the expression of inflammation-related genes in these fish was detected by quantitative polymerase chain reaction.@*RESULTS@#Subject to RPQE administration, the migration and aggregation of leukocytes were significantly alleviated in 3 zebrafish models (P<0.01). Herein, RPQE ameliorated TNBS-induced IBD with respect to a significantly reduced number of leukocytes, improved IEE, and inhibited gene expression of pro-inflammatory factors (P<0.05 or P<0.01).@*CONCLUSION@#RPQE exhibited therapeutic effects on IBD by inhibiting inflammation.

Research Progress of Iron Metabolism in Disease Progression and Drug Resistance of Multiple Myeloma--Review / 中国实验血液学杂志

Iron metabolism is involved in the development and drug resistance of many malignancies, including multiple myeloma (MM). Based on recent studies on iron metabolism and MM, this paper reviews the relationship between iron metabolism and disease process of MM in terms of iron overload leading to ferroptosis in MM cells, the role of iron deficiency in oxidative respiration and proliferation of MM cells, and the interaction between ferroptosis and autophagy in the disease process. The mechanisms by which iron metabolism-related substances lead to MM cells' resistance to proteasome inhibitors (PI) through inducing redox imbalance and M2 macrophage polarization are also briefly described, aiming to provide a theoretical basis for the application of iron metabolism-related drugs to the clinical treatment of MM patients.

High-Throughput Sequencing Technology for Detection of Gene Mutations in Myeloid Malignancies and Its Clinical Prognostic Significance / 中国实验血液学杂志

OBJECTIVE@#To detect the gene mutations in patients with myeloid malignancies by high-throughput sequencing and explore the correlation between gene mutations and prognosis.@*METHODS@#A retrospective analysis was performed on 56 patients with myeloid malignancies who were hospitalized in the department of hematology, Peking University International Hospital from January 2020 to May 2021. The genetic mutations of the patients were detected by next-generation sequencing technology, and the correlation between the genetic mutations and prognosis of myeloid malignancies was analyzed.@*RESULTS@#In 56 patients, the number of mutated genes detected in a single patient is 0-9, with a median of 3. Sequencing results showed that the most common mutated genes were RUNX1(21.4%), TET2(17.9%), DNMT3A(17.9%), TP53(14.3%) and ASXL1(14.3%), among which the most common mutations occurred in the signaling pathway-related genes (23.3%) and the transcription factor genes (18.3%). 84% of the patients carried multiple mutated genes (≥2), and correlation analysis showed there were obvious co-occurring mutations between WT1 and FLT3, NPM1 and FLT3-ITD, and MYC and FLT3. TP53 mutation was more common in MDS patients.The overall survival time of patients with NRAS mutation was significantly shortened (P =0.049). The prognosis of patients with TP53 mutation was poor compared with those without TP53 mutation, but the difference wasn't statistically significant (P =0.08).@*CONCLUSION@#The application of next-generation sequencing technology is of great significance in myeloid malignancies, which is helpful to better understand the pathogenesis of the disease, to judge the prognosis and to find possible therapeutic targets.

Clinical characteristics of hospitalized premenopausal patients with hyperuricemia / 中华全科医师杂志

Objective:To analyze the clinical characteristics of hospitalized premenopausal patients with hyperuricemia.Methods:The medical records of premenopausal women with hyperuricemia (serum uric acid ≥360 μmol/L during hospitalization) admitted in Peking Union Medical College Hospital from 2013 to 2018 were reviewed and the clinical data were analyzed.Results:A total of 2 099 patients were enrolled. Only 14.01% (294 cases) of the patients were concerned about hyperuricemia by physicians. Autoimmune diseases (32.11%, 674 cases), nephrotic disease (19.29%, 405 cases) and endocrine system diseases (9.72%, 204 cases) are the main reasons for hospitalization, while 6.34%(133 cases) of patients were in gestation. In terms of the etiology, renal diseases (49.35%, 1 035 cases), specific drug use (49.26%, 1 034 cases) were the main causes of secondary hyperuricemia in premenopausal women, followed by metabolic diseases (10.62%, 233 cases). There was no significant difference in serum uric acid level among premenopausal women of different ages ( H=4.47, P=0.107), but the etiology of hyperuricemia among patients of different ages had significant differences. The proportion of hyperuricemia in patients with cancer and metabolic syndrome,secondary to use of diuretics and anti-tuberculosis drugs had differences among different age groups ( χ2=90.96,52.89,19.26 and 6.41, P<0.05). Conclusion:Hyperuricemia is not uncommon in premenopausal women. There are many secondary factors leading to hyperuricemia in premenopausal women, among which drugs and renal lesions are the main causes. In addition, the secondary factors in women with hyperuricemia has differences among different age groups.

Clinical features of non-cirrhotic portal hypertension in patients with common variable immunodeficiency / 中华内科杂志

We wished to summarize the clinical features of common variable immunodeficiency (CVID) complicated by non-cirrhotic portal hypertension (NCPH) and to deepen our understanding of it. The case data of CVID complicated with NCPH admitted to Peking Union Medical College Hospital from January 1983 to May 2021 were analyzed retrospectively to summarize their clinical characteristics. Six patients with CVID combined with NCPH (three of each sex; 16-45 years) were assessed. Four patients had portal hypertension. All patients had anemia, splenomegaly, a normal serum level of albumin and transaminases, and possibly increased levels of alkaline phosphatase and gamma-glutamyl transpeptidase. Two patients were diagnosed with esophagogastric fundic varices by gastroscopy. Two patients underwent splenectomy (which improved hematologic abnormalities partially). Four patients had autoimmune disease. Two cases were diagnosed with nodular regenerative hyperplasia (NRH) upon liver biopsy. Six patients were administered intravenous immunoglobulin-G (0.4-0.6 g/kg bodyweight) once every 3-4 weeks as basic therapy. Often, CVID complicated with NCPH has: (1) The manifestations of portal hypertension as the primary symptom. (2) Autoimmune-related manifestations. Imaging can provide important diagnostic clues. The etiology may be related to hepatic NRH and splenomegaly due to recurrent infections.

Occurrence and influencing factors of medication deviation in elderly patients with chronic diseases / 中华老年医学杂志

Objective:To observe the occurrence of medication deviation in elderly patients with chronic diseases, and analyze the related factors leading to its occurrence.Methods:Convenience sampling method was used to select 164 elderly patients with chronic diseases who were discharged from the hospital after treatment from April 2021 to March 2022 as the study subjects.The pharmacists reviewed the patient's discharge medication and counted the occurrence of medication deviation.The patients were divided into the occurrence group and the non-occurrence group, and the relevant data of the two groups and their attending physicians were analyzed and compared. Logistic regression analysis was used to test the influencing factors of medication deviation in elderly patients with chronic diseases. Results:Medication deviation were identified in 110 of the 164 patients, and the incidence of medication deviation was 67.1%.Compared with the non-occurrence group, the number of diseases, discharge prescriptions of patients were more, the differences were statistically significant( Z=2.552, t=3.063, both P<0.05). The age of attending physicians in the occurrence group were younger, and their working years were shorter, professional title was lower compared with those in the non-occurrence group( Z=3.754, 3.713, Z=2.016, P<0.05 for all); Logistic regression analysis showed that the number of diseases and discharge prescriptions were the risk factors for medication deviation in elderly patients with chronic diseases( OR=1.260, 1.227, both P<0.05); older age and longer working years of attending physicians were the protective factors for medication deviation( OR=0.925, 0.930, both P<0.05). Conclusions:The incidence of medication deviation in elderly patients with chronic diseases in our hospital is high.Number of chronic diseases, discharge prescriptions, younger age and relatively shorter working years of attending physicians may lead to medication deviation.

Value of conventional ultrasonography combined with cervical compression in the diagnosis of orbital venous malformation / 中华超声影像学杂志

Objective:To explore the value of conventional ultrasonography combined with cervical compression in the diagnosis of orbital venous malformation (OVM).Methods:A total of 43 patients with suspected OVM were admitted in sequentially from January 2019 to July 2022 in the Third Medical Center of PLA General Hospital. All patients were examined by ultrasonography combined with cervical compression and demonstrated by operation or digital subtraction angiography (DSA). The conventional ultrasound features of OVM were summarized, and the value of conventional ultrasonography combined with cervical compression in the diagnosis of OVM was discussed.Results:The features of the conventional ultrasound combined with cervical compression for diagnosis of OVM were as follows: the interior of lesion was mainly tubular structure, and the compression test was positive. After cervical compression, the lesion enlarged and the inner diameter of the internal tubular structure widened. Doppler flow imaging showed that the interior of lesion was mainly venous blood flow. Compared with the results of postoperative pathology or DSA, the sensitivity, specificity, accuracy and positive predictive value of ultrasonography combined with cervical compression were 0.952, 1.000, 95.3% and 100%, respectively. The results of Fisher exact diagnosis showed that there was no significant difference between ultrasonography and operation or DSA of OVM( P>0.05). Conclusions:Conventional ultrasound combined with cervical compression can be used as an effective method for the diagnosis of OVM.

Spatio-temporal distribution of emerging snail-infested sites in different environmental types in Yunnan Province / 中华地方病学杂志

Objective:To explore the spatial and temporal distribution patterns of emerging snail-infested sites in different environmental types in Yunnan Province.Methods:The data of snail-infested sites in Yunnan Province from 1950 to 2014 (from Yunnan Institute for Endemic Diseases Control and Prevention), were collected and sorted out, a spatial and temporal database on the distribution of emerging snail-infested sites were established, and the changes in the spatial and temporal distribution of emerging snail-infested sites in different environments types (ditches, tangerines, paddy fields, dry land, beaches and other environments) were studied by using spatial autocorrelation analysis and scanning statistics analysis.Results:From 1950 to 2014, the annual number of emerging snail-infested sites in Yunnan Province reached a peak (1 730) in 1955 and then showed a fluctuating downward trend. From 1993 to 2014, the number of emerging snail-infested sites remained below 100, and increased to 160 and 131, respectively, in 2004 and 2013. The longest mean duration of 43.85 years was recorded for the beaches environment for emerging snail-infested sites, followed by the paddy fields environment with a mean duration of 37.01 years, and the shortest mean duration of 20.44 years for the tangerines environment. Spatial autocorrelation analysis showed that there was a positive spatial correlation between the duration of emerging snail-infested sites of different environmental types (global Moran's I ranged from 0.43 to 0.64, P < 0.05). Scanning statistics analysis showed that emerging snail-infested sites of different environmental types had spatial and temporal aggregation ( P < 0.001), with 3- 6 clusters of statistically significant aggregation detected respectively. Conclusion:The emerging snail-infested sites in different environments types in Yunnan Province have spatial and temporal aggregation, and it is necessary to strengthen monitoring and prevention and control of the aggregation areas of different environment types to prevent further spread of the snail.

Effects of intervention mapping-based health education on therapeutic cognitive perception of pulmonary arterial hypertension patients / 中国实用护理杂志

Objective:To investigate the application value of intervention mapping-based health education on therapeutic cognitive perception of pulmonary arterial hypertension patients.Methods:Totally, 60 patients with pulmonary arterial hypertension from January 2018 to January 2021 in Huazhong Fuwai Central Vascular Disease Hospital were assigned to the experimental group and control group according to admission time, with 30 cases in each group. The control group received routine health education, while the experimental group implemented intervention mapping-based health education. The intervention effects were assessed by Beliefs about Medicine Questionnaire-Specific (BMQ-S), Morisky Medication Adherence Scale (MMAS), 6MWT as well as Borg Scale (BS).Results:At 1 month and 3 months after discharge, the scores of MMAS in the experimental group were significantly higher than in the control group[(5.43±1.17) points, (5.57±1.17) points vs (4.60±1.54) points and (4.87±1.41) points], the differences were statistically significant ( t=2.36, 2.10, both P<0.05). At 3 months after discharge, the scores of necessity belief subscale in the experimental group were higher than those in the control group [(22.93±2.63) points vs (21.27±2.73) points], concern belief subscale scores lower than in the control group [(12.40±2.54) points vs (14.13±3.01) points], 6MWT distance in the experimental group higher than in the control group [(532.13±38.51) m vs (507.03±51.13) m], BS scores lower than in the control group [(3.53±1.20) points vs (4.10±0.84) points], the differences were statistically significant ( t values were 2.12-2.41, all P<0.05). Conclusions:Intervention mapping-based health education can improve therapeutic cognitive perception and medication adherence of pulmonary arterial hypertension, it is helpful to promote rehabilitation of patients.

A multicenter clinical study of the impact of COVID-19 pandemic on hospitalization of children with bronchiolitis / 国际儿科学杂志

Objective:In order to explore the impact of corona virus disease 2019(COVID-19)on the hospitalization of children with bronchiolitis and to improve clinicians′ understanding of the characteristics of bronchiolitis during the COVID-19 epidemic.Methods:This was a multicenter clinical study, and the data have been collected from 23 children′s medical centers in China.All the clinical data were retrospectively collected from children with bronchiolitis who were hospitalized at each study center from January 1, 2019 to December 31, 2021.The results included gender, age at hospitalization, length of stay, respiratory syncytial virus(RSV) test results, severity rating, ICU treatment, and the total number of children hospitalized with respiratory tract infection during the same period.The clinical data of children with bronchiolitis in 2019 before COVID-19 epidemic and in 2020、2021 during COVID-19 epidemic were statistically analyzed and compared.Results:According to a summary of data provided by 23 children′s medical centers, there were 4 909 cases of bronchiolitis in 2019, 2 654 cases in 2020, and 3 500 cases in 2021.Compared with 2019, the number of bronchiolitis cases decreased by 45.94% in 2020 and 28.70% in 2021.In 2019, 2020 and 2021, there were no significant differences in gender ratio, age, and duration of hospitalization.Compared with 2019, the ratio of bronchiolitis to the total number of hospitalizations for respiratory tract infection decreased significantly in 2020 and 2021( χ2=12.762, P<0.05; χ2=84.845, P<0.05).The proportion of moderate to severe bronchiolitis cases in both 2020 and 2021 was lower than that in 2019, and the difference was statistically significant ( χ2=4.054, P<0.05; χ2=8.109, P<0.05).There was no statistically significant difference in the proportion of bronchiolitis cases requiring ICU treatment between 2019, 2020, and 2021 ( χ2=1.914, P>0.05).In 2019, a total of 52.60%(2 582/4 909) of children with bronchiolitis underwent RSV pathogen testing, and among them, there were 708 cases with RSV positive, accounting for 28.00%.In 2020, 54.14%(1 437/2 654) of children with bronchiolitis underwent RSV pathogen testing, and there were 403 cases with RSV positive, accounting for 28.04%.In 2021, 66.80%(2 238/3 500) of children with bronchiolitis underwent RSV pathogen testing, and there were 935 cases with RSV positive, accounting for 41.78%.Compared with 2019 and 2020, the RSV positive rate in 2021 showed a significant increase( χ2=99.673, P<0.05; χ2=71.292, P<0.05). Conclusion:During the COVID-19 epidemic, the implementation of epidemic prevention and control measures reduced the hospitalization rate and severity of bronchiolitis, but did not reduce the positive rate of RSV detection.

Evaluation of the humoral immunity in mice induced by foot-and-mouth disease virus-like particles-ZIF-8 complexes with different sizes / 生物工程学报

To further enhance the immune effect of the foot-and-mouth disease (FMD) virus-like particles (VLPs) vaccine, this study prepared FMDV VLPs-zeolitic imidazolate (framework-8, ZIF-8) complexes with different particle sizes. We used a biomimetic mineralization method with Zn2+ and 2-methylimidazole in different concentration ratios to investigate the effect of size on the immunization effect. The results showed that FMDV VLPs-ZIF-8 with three different sizes were successfully prepared, with an approximate size of 70 nm, 100 nm, and 1 000 nm, respectively. Cytotoxicity and animal toxicity tests showed that all three complexes exhibited excellent biological safety. Immunization tests in mice showed that all three complexes enhanced the titers of neutralizing and specific antibodies, and their immune effects improved as the size of the complexes decreased. This study showed that ZIF-8 encapsulation of FMDV VLPs significantly enhanced their immunogenic effect in a size-dependent manner.

Changes and distribution of antibodies in plasma before and after infection of SARS-CoV-2 Omicron strain / 中国输血杂志

【Objective】 To determine the best collection time period of plasma which can be used for human COVID-19 immunoglobulin for intravenous injection through SARS-CoV-2-IgG change and neutralizing antibody distribution against different virus strain in representative mixed plasma before and after Omicron strain infection by ELISA and pseudovirus neutralization test. 【Methods】 An ELISA method for quantitative detection of SARS-CoV-2-IgG was established and its linear range,accuracy and precision was verified. SARS-CoV-2-IgG potency was detected in 25 convalescent plasma which were collected 20-40 days after confirmed Omicron infection, two groups of mixed plasma samples WP1 and WP2 were prepared according to the SARS-CoV-2-IgG results, and pseudovirus neutralization experiments with different virus strain (prototype strain, BA. 1,BA.2, BA.4/5, BF.7, BQ.1.1) were carried out to determine the distribution of neutralizing antibodies against different virus strain. SARS-CoV-2-IgG potency of representative mixed plasma collected from 14 plasma stations subordinate to the company before and after Omicron strain infection was detected, including Omicron convalescent plasma (OP) collected from different plasma stations from December 2022 to May 2023 and normal pool plasma (VN) feed in March 2023 which collected from March 2022 to December 2022. According to the results, the difference and the change rule with time of SARS-CoV-2-IgG before and after Omicron strain infection were analyzed. 【Results】 The linearity of SARS-CoV-2-IgG ranged from 6.25 to 200 EIU/mL, the accuracy in-batch ranged from 81.793% to 106.985%, the precision in-batch ranged from 1. 100% to 13.000%, and the total error in-batch ranged from 2.988% to 22.679%. The accuracy between batches ranged from 90.788%to 96.893%, the precision between batches ranged from 4.870% to 6.272%, and the total error between batches ranged from 9.192% to 15.399%. The results of pseudovirus neutralizing antibody showed that the potency of different virus strain neutralizing antibodies were in the order of prototype strain>BA.2>BA.4/5>BF.7≈ BQ.1.1>BA.1 and the correlation between WP1 and WP2 was high (Pearson r=0. 931 1, P=0.002 3) which indicated that the potency distribution of neutralizing antibodies of different virus strain in Omicron convalescent plasma was basically stable. Compared with the mixed convalescent plasma sample G128 collected in June 2022, the potency of Omicron neutralizing antibodies of WP series were significantly higher, the ratio of BA.2 antibody to prototype antibody increased from 26.9% (before infection) to 82.6%-87.5% (after infection). The results of VN series before Omicron infection were < 100 EIU/mL, and the results of OP series after Omicron infection showed that the plasma collected from the beginning of December 2022 was the peak of antibody in the same month,and then dropped sharply, entering a short plateau in February-March 2023 (potency was about 40% of the peak value),and then dropped sharply again in April (potency was about 20% of the peak value). 【Conclusion】 The potency and proportion of neutralizing antibody against Omicron subtype in convalescent plasma after COVID-19 Omicron strain infection increased significantly. IgG antibody of plasma donors in different regions reached its peak in the month of infection, then continued to dropped sharply. The best collection period of plasma that can be used for human COVID-19 immunoglobulin for intravenous injection was 1 to 2 months after infection.

Molluscicidal effect of spraying 5% niclosamide ethanolamine salt granules with drones against Oncomelania hupensis in hilly regions / 中国血吸虫病防治杂志

Objective To establish a snail control approach for spraying chemicals with drones against Oncomelania hupensis in complex snail habitats in hilly regions, and to evaluate its molluscicidal effect. Methods The protocol for evaluating the activity of spraying chemical molluscicides with drones against O. hupensis snails was formulated based on expert consultation and literature review. In August 2022, a pretest was conducted in a hillside field environment (12 000 m2) north of Dafengji Village, Dacang Township, Weishan County, Yunnan Province, which was assigned into four groups, of no less than 3 000 m2 in each group. In Group A, environmental cleaning was not conducted and 5% niclosamide ethanolamine salt granules were sprayed with drones at a dose of 40 g/m2, and in Group B, environmental cleaning was performed, followed by 5% niclosamide ethanolamine salt granules sprayed with drones at a dose of 40 g/m2, while in Group C, environmental cleaning was not conducted and 5% niclosamide ethanolamine salt granules were sprayed with knapsack sprayers at a dose of 40 g/m2, and in Group D, environmental cleaning was performed, followed by 5% niclosamide ethanolamine salt granules sprayed with knapsack sprayers at a dose of 40 g/m2. Then, each group was equally divided into six sections according to land area, with Section 1 for baseline surveys and sections 2 to 6 for snail surveys after chemical treatment. Snail surveys were conducted prior to chemical treatment and 1, 3, 5, 7 days post-treatment, and the mortality and corrected mortality of snails, density of living snails and costs of molluscicidal treatment were calculated in each group. Results The mortality and corrected mortality of snails were 69.49%, 69.09%, 53.57% and 83.48%, and 68.58%, 68.17%, 52.19% and 82.99% in groups A, B, C and D 14 days post-treatment, and the density of living snails reduced by 58.40%, 63.94%, 68.91% and 83.25% 14 days post-treatment relative to pre-treatment in four groups, respectively. The median concentrations of chemical molluscicides were 37.08, 35.42, 42.50 g/m2 and 56.25 g/m2 in groups A, B, C and D, and the gross costs of chemical treatment were 0.93, 1.50, 0.46 Yuan per m2 and 1.03 Yuan per m2 in groups A, B, C and D, respectively. Conclusions The molluscicidal effect of spraying 5% niclosamide ethanolamine salt granules with drones against O. hupensis snails is superior to manual chemical treatment without environmental cleaning, and chemical treatment with drones and manual chemical treatment show comparable molluscicidal effects following environmental cleaning in hilly regions. The cost of chemical treatment with drones is slightly higher than manual chemical treatment regardless of environmental cleaning. Spraying 5% niclosamide ethanolamine salt granules with drones is recommended in complex settings with difficulty in environmental cleaning to improve the molluscicidal activity and efficiency against O. hupensis snails.

Incidence and Risk Factors for Radiotherapy-Induced Oral Mucositis Among Patients With Nasopharyngeal Carcinoma: A Meta-Analysis

Purpose@#To evaluate the incidence and identify the risk factors for radiotherapy-induced oral mucositis among patients with nasopharyngeal carcinoma. @*Methods@#A meta-analysis was conducted. Eight electronic databases (Medline, Embase, Cochrane Library, CINAHL Plus with Full Text, Web of Science, China National Knowledge Infrastructure, Wanfang Database, and Chinese Scientific Journals Database) were systematically searched from inception to 4 March 2023 for relevant studies. Study selection and data extraction were conducted by two independent authors. The Newcastle‒Ottawa scale was used for quality assessment among the included studies. Data synthesis and analyses were performed in R software package version 4.1.3 and Review Manager Software 5.4. The pooled incidence was calculated using proportions with 95% confidence intervals (CIs), and the risk factors were evaluated using the odds ratio (OR) with 95% CIs. Sensitivity analysis and predesigned subgroup analyses were also conducted. @*Results@#A total of 22 studies published from 2005 to 2023 were included. The results of the meta-analysis showed that the incidence of radiotherapy-induced oral mucositis was 99.0% among nasopharyngeal carcinoma patients, and the incidence of severe radiotherapy-induced oral mucositis was 52.0%. Poor oral hygiene, overweight before radiotherapy, oral pH < 7.0, the use of oral mucosal protective agents, smoking, drinking, combined chemotherapy, and the use of antibiotics at early treatment stage are risk factors for severe radiotherapy-induced oral mucositis. Sensitivity analysis and subgroup analyses also revealed that our results are stable and reliable. @*Conclusions@#Almost all patients with nasopharyngeal carcinoma have suffered from radiotherapy-induced oral mucositis, and more than half of patients have experienced severe oral mucositis. Facilitating oral health might be the key focus of reducing the incidence and severity of radiotherapy-induced oral mucositis among nasopharyngeal carcinoma patients.Registration numberCRD42022322035.

Human Telomeric i-motif: Its Structure‚ Recognition and Physiological Activity / 中国生物化学与分子生物学报

The human telomeric i-motif (htel-iM) is a unique higher-order DNA structure formed by the cytosine-rich (C) sequences at the end of human telomeres. Studies have shown that htel-iM plays a significant role in the transcriptional regulation of telomeric repeat-containing RNA (TERRA) ‚ maintenance of telomere function and inhibition of telomerase activity. Thus‚ it is closely related to the development and progression of many cancers and is a promising new target for cancer treatment therapy. Compared to other nucleic acid higher-order structures such as G-quadruplexes‚ the stability of htel-iM is much weaker and affected by many factors like buffer pH‚ ionic conditions and molecular crowding environments. Therefore the existence of the iM structures in near neutral physiological conditions has been uncertain for a long time. Recently‚ using in-vitro screened small molecule ligands to selectively recognize and stabilize htel-iM provides a new strategy for the exploration of the biological relevance of htel-iM. Thus it has become a research hotspot to take telomere as a cancer treatment target. However‚ so far the reported small molecule ligands selectively targeting the htel-iM are far from sufficient compared with those targeting other higher-order nucleic acid structures. In this review‚ the discovery and the characteristic of the iM structures are briefly described‚ with an emphasis on the in-vitro affecting factors of the htel-iM structure‚ the reported htel-iM ligands and its biological relevance and regulation mechanisms‚ which will be helpful in further exploration of the htel-iM structure and ligand screening in near physiological conditions‚ and understanding the mechanism and developing novel therapeutic strategies for cancer treatment targeting the htel-iM structures.

Establishment of Digital PCR Detection Method for Copy Number Variation of LAPTM4B Gene in Non-small Cell Lung Cancer / 中国生物化学与分子生物学报

We aim to establish a chip-based digital PCR (dPCR) method for detecting copy number variation of the LAPTM4B gene in non-small cell lung cancer (NSCLC), and preliminarily evaluate its basic performance and clinical feasibility. The LAPTM4B gene primers and specific probes were designed to establish a dPCR reaction system. The detection limit, precision, and linearity of the method were verified according to the prepared target DNA samples of different concentrations. The reaction system of dPCR for LAPTM4B gene copy number detection was established and optimized for the first time. The results showed that 12. 5% of LAPTM4B gene copy number deletion could be detected at the lowest level. The coefficient of variation of inter-batch precision was less than 10%, and the linearity of deletion ratio was good in the range of 12. 5%-100% (R

Effect of phillygenin on inflammatory response of A549 cells induced by lipopolysaccharide and normal human plasma / 中国药理学通报

Aim To investigate the effect of phillygenin ( PHI) on lipopolysacchride ( LPS) and normal human plasma ( NHP) induced inflammatory injury on alveolar type II epithelial A549 cells and the related mechanism. Methods A549 cells were exposured to 1 mg • L

Effect of Gualou Xiebai Decoction on type II cardiorenal syndrome based on endothelial/epithelial-to-mesenchymal transition and its mechanism / 中国药理学通报

Aim To investigate the protective effects of different doses Gualou Xiebai Decoction (GXD) on type II cardiorenal syndrome (type II CRS) and explore its preliminary mechanisms. Methods The type II cardiorenal syndrome rat model was replicated by li-gating the left anterior descending coronary artery. After 10 weeks of intragastric administration, the cardiac function of the rats in each group was evaluated by echocardiography; serum were collected for biochemical testing; heart and kidney tissue samples were stained with HE and Masson to observe pathological changes. The hydroxyproline content in the heart and kidney was detected. The expression levels of endothelial/epitheli-al-to-mesenchymal transition (EndMT/EMT) related proteins in heart and kidney tissues were detecterd by immunofluorescence double staining