Surveillance of pesticide poisoning in an East and a West Malaysian hospital: characteristics of pesticide poisoning and the early impact of a national Paraquat ban

The characteristics of suicide attempters in Chinese patients: Comparison of adolescents, youths, middle-aged and elderly

BACKGROUND

Potential risk factors for suicide differ by age group. Therefore, this study aims to investigate the characteristics of patients with suicide attempts according to age group and any the relevant risk factors.

METHODS

This study retrospectively reviewed the medical records of attempted suicide patients who were admitted to the emergency departments (ED) of the First Affiliated Hospital of Wenzhou Medical University between January 1, 2017, and December 31, 2021. Demographic information and clinical characteristics were collected. The participants were divided into four age groups and the characteristics of each group were compared.

RESULTS

A total of 834 participants were included in this study. Suicide attempts were more prevalent in females, and the gender difference decreased with age. Having religious belief and less educated suicide attempts were concentrated in the elderly groups. Adolescents suicide attempts were more likely to occur in the spring, autumn and during non-office hours. Mental disorders were the major motivation for suicide among adolescents, and interpersonal and social problems were more prevalent among youths. Psychiatric medication was the leading suicidal substances among adolescents, while pesticides and herbicides were more prevalent in adults. The history of psychiatric diagnosis was more common in adolescents, while the history of somatic disorder was more prevalent in the elderly.

CONCLUSION

This study confirmed differences in the demographic and clinical characteristics of patients in different age groups. Therefore, it is necessary to construct individualized intervention strategies for each age group based on the characteristics of the patients in order to reduce suicide.

Agricultural habitat use affects infant survivorship in an endangered macaque species

Infant survival is a major determinant of individual fitness and constitutes a crucial factor in shaping species' ability to maintain viable populations in changing environments.1 Early adverse conditions, such as maternal loss, social isolation, and ecological hazards, have been associated with reduced rates of infant survivorship in wild primates.2,3,4 Agricultural landscapes increasingly replacing natural forest habitats may additionally threaten the survival of infants through exposure to novel predators,5 human-wildlife conflicts,6,7 or the use of harmful chemicals.8,9 Here, we investigated potential links between agricultural habitat use and high infant mortality in wild southern pig-tailed macaques (Macaca nemestrina) inhabiting a mosaic landscape of rainforest and oil palm plantation in Peninsular Malaysia. Longitudinal data revealed that 57% of all infants born during the study period (2014-2023) died before the age of 1 year, far exceeding mortality rates reported for other wild primates.10,11,12,13,14 Importantly, prolonged time spent in the plantation during infancy decreased the likelihood of infant survival by 3-fold, likely caused by increased exposure to the threats inherent to this environment. Further, mortality risk was elevated for infants born to primiparous mothers and predicted by prolonged maternal interbirth intervals, suggesting potential long-term effects attributed to the uptake and/or accumulation of pesticides in mothers' bodies.15,16,17 Indeed, existing literature reports that pesticides may cross the placental barrier, thus impacting fetal development during pregnancy.18,19,20 Our findings emphasize the importance of minimizing anthropogenic threats to wildlife in agricultural landscapes by establishing environmentally friendly cultivation practices that can sustain wildlife populations in the long term.

Integrated untargeted and targeted proteomics to unveil plasma prognostic markers for patients with acute paraquat poisoning: A pilot study

Paraquat (PQ) is a widely used but strongly toxic herbicide, which can induce multiple organ failure. The overall survival rate of the poisoned patients was only 54.4% due to lack of specific antidotes. Besides, the definite pathogenic mechanism of PQ is still not fully understood. In this pilot study, untargeted and targeted proteomics were integrated to explore the expression characteristics of plasma protein in PQ poisoned patients, and identify the differentially expressed proteins between survivors and non-survivors. A total of 494 plasma proteins were detected, and of which 47 were upregulated and 44 were downregulated in PQ poisoned patients compared to healthy controls. Among them, five differential plasma proteins (S100A9, S100A8, MB, ACTB and RAB11FIP3) were further validated by multiple reaction monitoring (MRM)-based targeted proteomic approach, and three of them (S100A9, S100A8 and ACTB) were confirmed to be correlated with PQ poisoning. Meanwhile, 84 dysregulated plasma proteins were identified in non-survivors compared with survivors. Moreover, targeted proteomic and ROC analysis suggested that ACTB had a good performance in predicting the prognosis of PQ poisoned patients. These findings highlighted the value of label-free and mass spectrometry-based proteomics in screening prognostic biomarkers of PQ poisoning and studying the mechanism of PQ toxicity.