Developmental and Nutritional Dynamics of Malpighian Tubule Autofluorescence in the Asian Tiger Mosquito Aedes albopictus.

Malpighian tubules (MTs) are arthropod excretory organs crucial for the osmoregulation, detoxification and excretion of xenobiotics and metabolic wastes, which include tryptophan degradation products along the kynurenine (KYN) pathway. Specifically, the toxic intermediate 3-hydroxy kynurenine (3-HK) is metabolized through transamination to xanthurenic acid or in the synthesis of ommochrome pigments. Early investigations in Drosophila larval fat bodies revealed an intracellular autofluorescence (AF) that depended on tryptophan administration. Subsequent observations documented AF changes in the MTs of Drosophila eye-color mutants genetically affecting the conversion of tryptophan to KYN or 3-HK and the intracellular availability of zinc ions. In the present study, the AF properties of the MTs in the Asian tiger mosquito, Aedes albopictus, were characterized in different stages of the insect's life cycle, tryptophan-administered larvae and blood-fed adult females. Confocal imaging and microspectroscopy showed AF changes in the distribution of intracellular, brilliant granules and in the emission spectral shape and amplitude between the proximal and distal segments of MTs across the different samples. The findings suggest AF can serve as a promising marker for investigating the functional status of MTs in response to metabolic alterations, contributing to the use of MTs as a potential research model in biomedicine.

[Basics of early intervention in children with autism spectrum disorders]. / Fundamentos de la intervención temprana en niños con trastornos del espectro autista.

Autism Spectrum Disorders (ASD) are characterized by impairments in communication and social interaction, as well as restricted and repetitive patterns of behavior. They have a prevalence of 0.6% in the general population, although there are no national statistics. Even though their evolution is variable, it has been observed that early intervention is an important factor determining prognosis. The aim of this study is to update concepts regarding the current available evidence on the importance of early intervention. After analyzing the collected information, the importance of early intervention programs for children with ASD is confirmed, as well as the role of pediatricians and other health professionals in the early detection of these disorders.

Pathogen-Mediated Alterations of Insect Chemical Communication: From Pheromones to Behavior.

Pathogens can influence the physiology and behavior of both animal and plant hosts in a manner that promotes their own transmission and dispersal. Recent research focusing on insects has revealed that these manipulations can extend to the production of pheromones, which are pivotal in chemical communication. This review provides an overview of the current state of research and available data concerning the impacts of bacterial, viral, fungal, and eukaryotic pathogens on chemical communication across different insect orders. While our understanding of the influence of pathogenic bacteria on host chemical profiles is still limited, viral infections have been shown to induce behavioral changes in the host, such as altered pheromone production, olfaction, and locomotion. Entomopathogenic fungi affect host chemical communication by manipulating cuticular hydrocarbons and pheromone production, while various eukaryotic parasites have been observed to influence insect behavior by affecting the production of pheromones and other chemical cues. The effects induced by these infections are explored in the context of the evolutionary advantages they confer to the pathogen. The molecular mechanisms governing the observed pathogen-mediated behavioral changes, as well as the dynamic and mutually influential relationships between the pathogen and its host, are still poorly understood. A deeper comprehension of these mechanisms will prove invaluable in identifying novel targets in the perspective of practical applications aimed at controlling detrimental insect species.

Female control of sperm ejection and retention in the cornsilk fly Euxesta eluta (Diptera: Ulidiidae).

Promiscuous mating systems provide the opportunity for females to bias fertilization toward particular males. However, distinguishing between male sperm competition and active female sperm choice is difficult for species with internal fertilization. Nevertheless, species that store and use sperm of different males in different storing structures and species where females are able to expel all or part of the ejaculates after copulation may be able to bias fertilization. We report a series of experiments aimed at providing evidence of female sperm choice in Euxesta eluta (Hendel), a species of ulidiid fly that expels and consumes ejaculates after copulation. We found no evidence of greater reproductive success for females mated singly, multiply with the same male, or mated multiply with different males. Female E. eluta possesses two spherical spermathecae and a bursa copulatrix for sperm storage, with a ventral receptacle. There was no significant difference in storing more sperm in spermathecae 24 h after copulation than immediately after copulation. Females mated with protein-fed males had greater reproductive success than similar females mated to protein-deprived males. Protein-fed females prevented to consume the ejaculate, retained more sperm when mated to protein-fed males than when mated to protein-deprived males. Our results suggest that female E. eluta can exert control of sperm retention of higher quality males through ejaculate ejection.

Jacaranda oil administration improves serum biomarkers and bioavailability of bioactive conjugated fatty acids, and alters fatty acid profile of mice tissues.

Jacaric acid, a conjugated linolenic acid (CLNA) present in jacaranda oil (JO), is considered a potent anticarcinogenic agent. Several studies have focused on its biological effects, but the metabolism once consumed is not clear yet. The aim of this work was to evaluate the effects of two different daily doses of JO on serum parameters and fatty acid (FA) profile of mice tissues after 4 weeks of feeding. No significant changes on body weight gain, food intake, or tissue weight were determined after 0.7 or 2 ml/kg of JO supplementation compared to control animals. Significantly lower blood low-density lipoproteins-cholesterol (20 mg/dl) and glucose (~147-148 mg/dl) levels were detected in both oil-treated groups compared to control (31.2 and 165 mg/dl, respectively). Moreover, jacaric acid was partially converted into cis9, trans11 conjugated linoleic acid (CLA) and thus further incorporated into tissues. Liver evidenced the highest total conjugated fatty acid content (1.1%-2.2%), followed by epididymal (0.7%-1.9%) and mesenteric (1.4%-1.8%) fat. Lower saturated and higher unsaturated fatty acid content was detected in both oil-treated groups compared to control. Our results support the safety of JO and its potential application with a functional or nutraceutical propose, by increasing human CLNA consumption and further availability of CLA.

[Survey for Caregivers of People with Autism Spectrum in Chile: Access to Health and Education Services, Satisfaction, Quality of Life And Stigma]. / Encuesta para Cuidadores de Personas del Espectro Autista en Chile. Acceso a Servicios de Salud y Educación, Satisfacción, Calidad de Vida y Estigma.

INTRODUCTION: People on the Autism Spectrum (AS) face multiple health, education, social, and economic pro blems. There is limited available information in Chile. OBJECTIVE: To describe the access and satisfac tion with health and education services, family and economic impact, stigma, and quality of life of people with AS and their families in Chile. SUBJECTS AND METHOD: Parents/caregivers of AS persons completed the Caregiver Needs Survey, developed by Autism Speaks, which includes demographic information, characteristics of AS persons (previously published), use of health and education servi ces, parents/caregivers' perceptions of satisfaction, impact, stigma, and quality of life. RESULTS: 291 caregivers (86% mothers) of 291 AS persons participated, 89% were male, aged 1-40 years (X:10.4 SD:6.1). Limited and unspecific access to health services is reported. 77% are regularly attending a standard or special school system. Families pay for over 60% of therapies/medical care and over 40% of specific educational support, and 25% report difficulties in accessing services. The family income is affected by resignation (35%) or reduced working hours (46%). Stigma is associated with possi ble discrimination and feelings of helplessness. The main priorities mentioned for a better quality of life are support for inclusive schooling, better adjustment at home, and improved socialization. CONCLUSIONS: This survey provides relevant information about the needs, barriers, and challenges of AS people in Chile and highlights the difficulties in accessing health services and the severe impact on family income. Feelings of stigma, discrimination, and helplessness are reported. Collaborative strategies are needed to improve the quality and access to services and to reduce the economic and mental health burden on the family.

Survey for caregivers of people in the autism spectrum in Chile: first concerns, age of diagnosis and clinical characteristics. / Encuesta para cuidadores de personas del espectro autista en Chile: Primeras preocupaciones, edad del diagnóstico y características clínicas.

INTRODUCTION: Autism Spectrum Disorders (ASD) are neurodevelopmental disorders of increasing prevalence. People with ASD have multiple health, education, and community needs, yet there is little information about their situation in Chile. OBJECTIVE: To learn about the demographic and clinical characteristics, caregiver's first concerns, and age of diagnosis of ASD individuals. PATIENTS AND METHOD: Participants were parents/caregivers of ASD persons, who answered the Caregiver Needs Survey, developed by Autism Speaks specifically for this purpose, and translated into Spanish. The survey is comprised of 4 sections: demographic information, characteristics of the ASD individual, past and present use of Health and Education Services, and parents/caregivers' perceptions of satisfaction, impact, stigma, and quality of life. Data from the first two sections are reported in this paper. RESULTS: The survey was answered by 291 caregivers (86% mothers) of 291 mostly male ASDs (89%), aged between 1-40 years (X: 10.4 SD: 6.1). The average age of parents' first concerns was 29.2m (SD: 23.8) where the main ones were: interaction difficulties (79.4%), unusual response to sensory stimuli (69.8%), behavioral problems (65.3%), unusual gestures/movements (64.3%), and lack of eye contact (63.6%). The ave rage age of diagnosis was 58m (SD: 36.5), with an average delay of diagnosis of 29m. The diagnosis was most frequently made by pediatric neurologists (44.7%), child psychiatrists (19.2%), and pedia tricians (5.5%). The most frequent comorbidities were language impairment, cognitive deficit, and behavioral problems. CONCLUSIONS: The late age of diagnosis of ASD and the large gap between the age of first concerns and diagnosis, represent a critical loss of treatment opportunities and jeopardize the chances of a better long-term outcome.

Trastornos por déficit de atención: consideraciones desde la psicología para un diagnóstico comprensivo integral / Attention deficit disorder: considerations from psychology for an integral comprehensive diagnosis

Se revisa el diagnóstico de Trastorno por Déficit de Atención en niños, en relación a su prevalencia (8 por ciento al 12 por ciento de los niños en edad escolar), siendo uno de los principales motivos de consulta en nuestro país. El objetivo del artículo es integrar los aportes de la mirada médica y la psicología en el diagnóstico, para que permitan otorgar las directrices de un tratamiento que considere el contexto y la particularidad de cada sujeto. Se describen los criterios diagnósticos utilizados y las implicancias de éste en el área de la salud mental, educación, familia y sociedad. Se plantea la comprensión desde la psicología, poniendo énfasis en considerar la inatención como síntoma de diversos cuadros emocionales en la infancia, al observar que desde el modelo médico generalmente este síntoma se reduce a un cuadro neurobiológico y a un posterior tratamiento principalmente farmacológico. La no consideración desde el paradigma de la complejidad y la multicausalidad en el diagnóstico, excluye áreas del desarrollo socio afectivo del niño que pueden ser fundamentales en la generación y el mantenimiento del cuadro. Se releva la necesidad de abordar este cuadro con una mirada más amplia en el diagnóstico e intervención, considerando los aspectos subjetivos e interaccionales, buscando así dar cuenta de un diagnóstico clínico completo y de un abordaje comprensivo integral.

This study reviews the diagnosis of attention deficit disorder in children, in relation to its prevalence (8 percent to 12 percent of school-age children), which makes it one of the main reasons for consultation in Chile. The article seeks to integrate the contributions of the medical and psychological points of view in the diagnosis, allowing the outline of treatment guidelines that take into account the context and the particularity of each subject. We describe the diagnostic criteria and the implications of this diagnosis in the area of mental health, education, family and society. We then approach the discussion from the psychology, underlining the lack of attention as a symptom of various emotional childhood disorders, observing that from the medical model this symptom is generally reduced to a neurobiological disorder and leads to an exclusively pharmacological treatment. We estimate that no consideration from the paradigm of the complexity and causality in the diagnosis, excludes the development of socio-affective areas of the child which can be critical in the generation and maintenance of the disorder. We finally propose deliverance of a wider look in the diagnosis of ADD, considering subjective aspects through the articulation of the medical assessment with a psychological evaluation. This would allow a full clinical diagnosis and an integrated comprehensive approach.