Forensic entom otoxicology is a branch of forensic m edicine, w hich applies entom ology, toxicology and other related studies to solve the poisoning cases. It has an obvious advantage in the investigation on poisoning death. B ased on the expounding definition and research of entom otoxicology, this paper review s research progress and application value in som e aspects of forensic m edicine, such as the effects of drugs/toxins on the growth and developm ent of sarcosaphagous insects and the qualitative and quantitative analysis of the drugs/toxins in the poisoned body tissue.

This study aims to investigate the effects of fibroblast growth factor 21 (FGF-21) on learning and memory abilities and antioxidant capacity of D-galactose-induced aging mice. Kunming mice (37.1 +/- 0.62) g were randomly divided into normal control group, model group and FGF-21 high, medium and low dose groups (n = 8). Each group was injected in cervical part subcutaneously with D-galactose 180 mg x kg(-1) x d(-1) once a day for 8 weeks. At the same time, FGF-21-treated mice were administered with FGF-21 by giving subcutaneous injection in cervical part at the daily doses of 5, 2 and 1 mg x kg(-1) x d(-1). The normal control group was given with normal saline by subcutaneous injection in cervical part. At seventh week of the experiment, the learning and memory abilities of mice were determined by water maze and jumping stand tests. At the end of the experiment, the mice were sacrificed and the cells damage of hippocampus was observed by HE staining in each group. Reactive oxygen species (ROS), malondialdehyde (MDA), superoxide dismutase (SOD), glutathione peroxidase (GPx), catalase (CAT) and total antioxidant capacity (T-AOC) in the brain of mice were determined. The results showed that different doses of FGF-21 could reduce the time reaching the end (P < 0.01 or P < 0.05) and the number of touching blind side (P < 0.01 or P < 0.05) in the water maze comparing with the model group. It could also prolong the latency time (P < 0.05) and decrease the number of errors (P < 0.01 or P < 0.05) in the step down test. The result of HE staining showed that FGF-21 could significantly reduce brain cell damage in the hippocampus. The ROS and MDA levels of three different doses FGF-21 treatment group reduced significantly than that of the model group [(5.58 +/- 1.07), (7.78 +/- 1.92), (9.03 +/- 1.77) vs (12.75 +/- 2.02) pmol (DCF) x min(-1) x mg(-1), P < 0.01 or P < 0.05], [(2.92 +/- 0.71), (4.21 +/- 0.81), (4.41 +/- 0.97) vs (5.62 +/- 0.63) nmol x mg(-1) (protein), P < 0.01]. Comparing with the model group, the activities of SOD, GPx, CAT and T-AOC of the three different doses FGF-21 treatment groups were also improved in a dose-dependent manner. This study demonstrates that FGF-21 can ameliorate learning and memory abilities of D-galactose induced aging mice, improve the antioxidant abilities in brain tissue and delay brain aging. This finding provides a theoretical support for clinical application of FGF-21 as a novel therapeutics for preventing aging.

Objective:To investigate the association of time in range with metabolic associated fatty liver disease(MAFLD) and advanced liver fibrosis in patients with type 2 diabetes.Methods:This study was a retrospective study. A total of 494 type 2 diabetic patients were recruited in the Department of Endocrinololgy of Henan Provincial People′s Hospital from November 2019 to April 2022. Time in range(TIR) was calculated with continuous glucose monitoring data. Abdominal ultrasound scan was used to diagnose fatty liver. Liver stiffness measurement(LSM) by transient elastography was used to evaluate liver fibrosis. Pearson and multivariate linear regression analysis was used to evaluate the association between TIR and LSM. Multivariate logistic regression analysis was used to analyze the association of TIR with risk of MAFLD and advanced liver fibrosis.Results:Pearson correlation analysis showed that LSM was negatively correlated with TIR( r=-0.86, P<0.001) and was positively correlated with homeostasis model assessment for insulin resistance(HOMA-IR; r=0.48, P<0.001). After adjusting for confounding factors, multivariate linear regression analysis showed that TIR significantly negatively predicted LSM( β=-0.75, P<0.001), and HOMA-IR significantly positively predicted LSM( β=0.21, P=0.025). After adjusting for confounding factors, logistic regression analysis showed that compared with TIR Q4 patients, TIR Q1 patients had an increased risk of MAFLD( OR=1.96, 95% CI 1.07-3.62, P=0.027), advanced liver fibrosis( OR=3.82, 95% CI 1.17-12.50, P=0.027), and HOMA-IR was an independent risk factor for MAFLD( OR=1.22, 95% CI 1.04-1.43, P=0.005) and advanced liver fibrosis( OR=1.26, 95% CI 1.03-1.54, P=0.025). Conclusions:TIR and insulin resistance are independent risk factors for MAFLD and advanced liver fibrosis in patients with type 2 diabetes. TIR has a significant predictive value for MAFLD and advanced liver fibrosis.

Objective:To analyze the demographic and clinical characteristics of elderly inpatients with osteoporotic femoral neck fractures(OFNF).Methods:Clinical data of 1 227 patients with OFNF treated at the department of orthopedics of Beijing Hospital from January 2010 to December 2019 were analyzed retrospectively, including 377 male and 850 female patients.Ten-year trends in the OFNF constituent ratio, patient age, average length of stay and hospitalization expenses were examined, and differences in demographic and clinical characteristics between different genders were analyzed.Results:From 2010 to 2017, the constituent ratio of OFNF patients increased each year, and the number of OFNF patients decreased slightly in 2018 and 2019.The age of onset in both male and female patients was the highest at the ages of 80-89(46.8% or 574/1 227). In the distribution of educational level, people with no education made up the highest proportion(36.7% or 450/1 227). The seasonal distribution of the disease was the highest in autumn(27.8% or 341/1 227). The constituent ratio of urban areas was higher than that of rural areas(54.6% or 670/1 227 vs.45.4% or 557/1 227). In the distribution of fracture types, the constituent ratio of 31-B2 fractures was the highest in both male and female patients.Of the causes of injury, the constituent ratio of falls and indoor activities was the highest.Hypertension, spinal degenerative diseases and knee and hip osteoarthritis ranked in the top three of concomitant diseases.The constituent ratio of previous fractures in females was significantly higher than that in males.In the past ten years, the average hospitalization length of OFNF patients showed a downward trend, and the change in average hospitalization cost showed abrupt fluctuations.From 2009 to 2016, the hospitalization cost showed an upward trend, with the highest in 2016, and then decreased year by year. Conclusions:In the past ten years, the number and constituent ratio of OFNF patients increased steadily in the first eight years, but decreased slightly or reached a plateau in the past two years.The education level, history of bone fractures, hypertension, spinal degenerative diseases and knee and hip osteoarthritis of OFNF patients were correlated with sex, while age distribution, seasonal distribution, urban and rural distribution, cause of injury, fracture classification and other concomitant diseases were not correlated with sex.In the past ten years, the average hospitalization length of OFNF patients trended downward, the average hospitalization cost showed an upward trend from 2009 to 2016, and decreased year by year after 2016.The medical policy reform in 2016 played a significant role in controlling medical expenses.