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ObjectiveTo study the phenomenon of pulmonary hypostasis in corpses of various causes of death， and to explore the potential value of this phenomenon in assisting forensic pathological diagnosis of drowning.MethodsA total of 235 cases with clear cause of death through systematic autopsy were collected from January 2011 to June 2021 in Guangzhou. According to the location of body discovery, the cases were divided into the water body group （97 cases） and the non-water body group （138 cases）, and the water body group was further divided into the water drowning group （90 cases） and the water non-drowning group （7 cases）. Non-water body group was further divided into the non-water drowning group （1 case） and the non-water non-drowning group （137 cases）. Three senior forensic pathologists independently reviewed autopsy photos to determine whether there was hypostasis in the lungs. The detection rate of pulmonary hypostasis was calculated.ResultsThe detection rate of pulmonary hypostasis in the water drowning group （90 cases） was 0， and the negative rate was 100%. The detection rate of pulmonary hypostasis in the water non-drowning group （7 cases） was 100% and the negative rate was 0. The detection rate of pulmonary hypostasis in the water body group and in the non-water body group （after excluding 2 cases, 136 cases were calculated） was 7.22% and 87.50%， respectively. There were statistically significant differences in the detection rate of pulmonary hypostasis between water body group and non-water body group, and between water drowning group and water non-drowning group （P

ObjectiveTo study the relationship between water temperature and floating time of aquatic cadavers， providing a reference for more precise positioning and searching for floating corpses.MethodsThe floating model of guinea pig after drowning at 17-30 ℃ was established, and the floating times of carcasses were recorded. The collected data of 32 floating corpse cases in the Pearl River were sorted out and analyzed according to the floating time of corpses corresponding to each degree of water temperature. The relationship models between water temperature and the floating time of guinea pig carcass, and between that and the floating time of real cases were established.ResultsThe floating time of the cadaver was negatively correlated with water temperature. The power function fitting equation of the relationship between floating time and water temperature of guinea pig carcass was y=1×1015x-10.530（R2=0.871, P

Background: Limited research has explored the associations of gestational age (GA) and breastfeeding practices with growth and nutrition in term infants. Methods: This multicenter cross-sectional study recruited 7299 singleton term infants from well-child visits in Shandong, China, between March 2021 and November 2022. Data on GA, gender, ethnicity, birth weight, parental heights, gestational diabetes and hypertension, age at visit, breastfeeding practices (point-in-time data at visit for infants < 6 months and retrospective data at 6 months for infants ≥ 6 months), complementary foods introduction, infant length and weight, were collected. 7270 infants were included in the analysis after excluding outliers with Z-scores of length (LAZ), weight or weight for length (WLZ) <-4 or > 4. Linear regression models adjused for covariates explored the impact of GA and breastfeeding practices on LAZ and WLZ, while logistic regression models evaluated their effect on the likelihood of moderate and severe stunting (MSS, LAZ<-2), moderate and severe acute malnutrition (MSAM, WLZ<-2) and overweight/obesity (WLZ > 2). Sensitivity analysis was conducted on normal birth weight infants (2.5–4.0 kg). Results: Infants born early-term and exclusively breastfed accounted for 31.1% and 66.4% of the sample, respectively. Early-term birth related to higher WLZ (< 6 months: β = 0.23, 95% confidence interval (CI): 0.16, 0.29; ≥6 months: β = 0.12, 95% CI: 0.04, 0.20) and an increased risk of overweight/obesity throughout infancy (< 6 months: OR: 1.41, 95% CI 1.08, 1.84; ≥6 months: OR: 1.35, 95% CI 1.03, 1.79). Before 6 months, early-term birth correlated with lower LAZ (β=-0.16, 95% CI: -0.21, -0.11) and an increased risk of MSS (OR: 1.01, 95%CI 1.00, 1.02); Compared to exclusive breastfeeding, exclusive formula-feeding and mixed feeding linked to lower WLZ (β=-0.15, 95%CI -0.30, 0.00 and β=-0.12, 95%CI -0.19, -0.05, respectively) and increased risks of MSAM (OR: 5.57, 95%CI 1.95, 15.88 and OR: 3.19, 95%CI 1.64, 6.19, respectively). Sensitivity analyses confirmed these findings. Conclusions: The findings emphasize the health risks of early-term birth and the protective effect of exclusive breastfeeding in singleton term infants, underscoring the avoidance of nonmedically indicated delivery before 39 weeks and promoting exclusive breastfeeding before 6 months. [ABSTRACT FROM AUTHOR]

Aims: This study aimed to explore the pathomechanism of a mutation on the leucine‐rich glioma inactivated 1 gene (LGI1) identified in a family having autosomal dominant lateral temporal lobe epilepsy (ADLTE), using a precise knock‐in mouse model. Methods and Results: A novel LGI1 mutation, c.152A>G; p. Asp51Gly, was identified by whole exome sequencing in a Chinese family with ADLTE. The pathomechanism of the mutation was explored by generating Lgi1D51G knock‐in mice that precisely phenocopied the epileptic symptoms of human patients. The Lgi1D51G/D51G mice showed spontaneous recurrent generalized seizures and premature death. The Lgi1D51G/+ mice had partial epilepsy, with half of them displaying epileptiform discharges on electroencephalography. They also showed enhanced sensitivity to the convulsant agent pentylenetetrazole. Mechanistically, the secretion of Lgi1 was impaired in the brain of the D51G knock‐in mice and the protein level was drastically reduced. Moreover, the antiepileptic drugs, carbamazepine, oxcarbazepine, and sodium valproate, could prolong the survival time of Lgi1D51G/D51G mice, and oxcarbazepine appeared to be the most effective. Conclusions: We identified a novel epilepsy‐causing mutation of LGI1 in humans. The Lgi1D51G/+ mouse model, precisely phenocopying epileptic symptoms of human patients, could be a useful tool in future studies on the pathogenesis and potential therapies for epilepsy. [ABSTRACT FROM AUTHOR]

This study proposes a strategy for screening and validating of antioxidant compounds and components from leaves of yacon (Smallanthus sonchifolius Poepp. and Endl.) by variable selection based on weight analysis. The theoretical basis of variable selection lies in that the varied quantity of variables will influence the activity results of samples. The ethyl acetate fraction (sample 0) with high DPPH scavenging activity was further separated using silica gel chromatographic column to obtain 17 subfractions (samples 1–17). The 18 samples contain different compounds exhibited different DPPH radical scavenging activities. Two components A and B with time range of 2.00–12.00 min and 53.00–64.00 min on the chromatogram were selected by variable selection, respectively. Simultaneously, a large number of compounds with different retention times (RTs) were screened out. Five predicted compounds, including chlorogenic acid, methyl caffeate, ethyl caffeate, homoeriodictyol, quercetin 3,7-dimethyl ether were isolated and verified by DPPH radical scavenging ability assay. The radical scavenging rates of those compounds were higher than that of ethyl acetate fraction and the positive control butylated hydroxyltoluene (BHT). Meanwhile, components A and B also show strong antioxidant activity. The radical scavenging activity of component A is higher than that of compounds which contained in component A, indicating the existence of synergistic antioxidant activity of compounds. The results of variable selection show that the proposed method is simple and reliable in screening the most active components and compounds. The method could be used for screening of compounds and components from other herbal plants with other activities. [ABSTRACT FROM AUTHOR]