Impact of COVID19 pandemic on patients with rare diseases in Spain, with a special focus on inherited metabolic diseases.

Introduction: The Covid-19 pandemic soon became an international health emergency raising concern about its impact not only on physical health but also on quality of life and mental health. Rare diseases are chronically debilitating conditions with challenging patient care needs. We aimed to assess the quality of life and mental health of patients with rare diseases in Spain, with a special focus on inherited metabolic disorders (IMD). Methods: A prospective case-control study was designed, comparing 459 patients suffering from a rare disease (including 53 patients with IMD) and 446 healthy controls. Quality of life (QoL) and mental health were assessed using validated scales according to age: KINDL-R and the Pediatric Symptom Checklist (PSC) for children and the WhoQoL-Bref questionnaire, GAD and PHQ-9 in adults. Results: First, children and adults (but not adolescents) with IMD showed greater psychological effects than controls (p = 0.022, p = 0.026 respectively). Second, when comparing QoL, only adult patients with IMD showed worse score than controls (66/100 vs 74,6/100 respectively, p = 0.017). Finally, IMD had better quality of life than other rare neurological and genetic diseases (p = 0.008) or other rare diseases (p < 0.001 respectively) but similar alteration of the mental status. Conclusions: Our data show that the pandemic had a negative impact on mental health that is more evident in the group of patients with IMD. Young age would behave as a protective factor on the perception of QoL. Furthermore, patients with IMD show a better QoL than other rare diseases.

Tizoxanide Antiviral Activity on Dengue Virus Replication.

Dengue virus is an important circulating arbovirus in Brazil responsible for high morbidity and mortality worldwide, representing a huge economic and social burden, in addition to affecting public health. In this study, the biological activity, toxicity, and antiviral activity against dengue virus type 2 (DENV-2) of tizoxanide (TIZ) was evaluated in Vero cell culture. TIZ has a broad spectrum of action in inhibiting different pathogens, including bacteria, protozoa, and viruses. Cells were infected for 1 h with DENV-2 and then treated for 24 h with different concentrations of the drug. The quantification of viral production indicated the antiviral activity of TIZ. The protein profiles in infected Vero cells treated and not treated with TIZ were analyzed using the label-free quantitative proteomic approach. TIZ was able to inhibit virus replication mainly intracellularly after DENV-2 penetration and before the complete replication of the viral genome. Additionally, the study of the protein profile of infected not-treated and infected-treated Vero cells showed that TIZ interferes with cellular processes such as intracellular trafficking and vesicle-mediated transport and post-translational modifications when added after infection. Our results also point to the activation of immune response genes that would eventually lead to a decrease of DENV-2 production. TIZ is a promising therapeutic molecule for the treatment of DENV-2 infections.

Evolução da sobrecarga de mães de crianças com síndrome congênita pelo zika vírus / Evolution of overload in mothers of children with congenital zika cirus syndrome / Evolución de la sobrecarga en madres de niños con síndrome congénito por el virus zika

Objetivo: analisar a evolução da sobrecarga física, emocional e social de mães de crianças com Síndrome Congênita pelo Zika Vírus (SCZV). Método: participaram 22 mães e seus respectivos filhos com SCZV, inseridas em um Centro Estadual de Reabilitação. Foram aplicados questionários de avaliação sociodemográfica e clínica, a Escala Gross Motor Function Classification System (GMFCS) e o Questionário Avaliação de Sobrecarga do Cuidador Informal (QASCI). Resultados: houve melhora na sobrecarga do cuidado das mães em relação ao aspecto financeiro (p<0,01) e piora no mecanismo de eficácia e controle (p=0,04) e satisfação com o papel e o familiar (p<0,01). Conclusão: a sobrecarga do cuidado de mães de crianças com SCZV apresentou melhoras e pioras em diferentes aspectos durante o período de acompanhamento. Deve-se fortalecer a rede de apoio familiar e garantir cuidado especializado, por uma equipe multiprofissional.

Objective: to analyze the progress of the physical, emotional and social overload from mothers of children with Congenital Zika Virus Syndrome (CZVS). Method: 22 mothers and their respective sons with CZVS participated. They were inserted in a State Rehabilitation Center. Sociodemographic and clinical evaluations questionnaires were applied, the scale Gross Motor Function Classification System Scale (GMFCS), and Informal Caregiver Burden Assessment Questionnaire (ICBAQ). Results: there was an improvement in the mothers' burden of care in relation to the financial aspect (p<0.01) and a worsening in the mechanism of effectiveness and control (p=0.04) and satisfaction with the role and the family (p<0.01). Conclusion: the overload of caring from mothers of CZVS children presented improvement and worsening on different aspects during the follow-up period. The family support network should be strengthened and specialized care provided by a multidisciplinary team should be guaranteed.

Objetivos:analizar la evolución de la sobrecarga física, emocional y social de las madres de niños con Síndrome Congénito por el Virus Zika (SCZV). Método: participaron 22 madres y sus respectivos hijos com SCZV, insertados em um Centro Estadual de Rehabilitación. Se aplicaron cuestionarios de evaluación demográfica, clínica y de sobrecarga del cuidador. Resultados: El estudio mostró que hubo una mejora en la carga de cuidado de las madres en relación al aspecto financiero y un empeoramiento en el mecanismo de efectividad y control, siendo las más afectadas en el segundo cobro, y la satisfacción con el rol y el miembro de la familia. Conclusión: la sobrecarga mostró mejoras y empeoramientos en diferentes aspectos. Esto se debe a las diferentes perspectivas de estas madres. La pandemia parece haber influido en el empeoramiento de algunos dominios, pues centralizó aún más los cuidados en la madre.

Evidence of Spreading Zika Virus Infection Caused by Males of Different Species.

Zika virus (ZIKV) is a positive-sense single-stranded RNA flavivirus and is mainly transmitted by Aedes mosquitoes. This arbovirus has had a significant impact on health in recent years by causing malformations, such as microcephaly in babies and Guillain-Barré syndrome in adults. Some evidence indicates that ZIKV can be sexually transmitted and may persist in the male reproductive tract for an extended period in humans. Knockout and vasectomized mice have been used as models to reveal ZIKV infection in the male reproductive tract as a virus source. ZIKV presence in male and female mosquito reproductive tracts and eggs point to venereal and vertical/transovarian transmission, again demonstrating that the reproductive tract can be involved in the spread of ZIKV. Moreover, eggs protected by eggshells have the potential to be a ZIKV reservoir. Given the +-lack of vaccines and therapies for Zika fever and the underestimated prevalence rate, an understanding of ZIKV infection and its spread from the reproductive tract, which is protected from the immune system and potentially active for virus transmission, is imperative. We must also develop cheaper, more efficient techniques for virological surveillance inside vectors and humans, control vectors with ecofriendly insecticides, and promote condom use to avoid ZIKV contamination during sexual intercourse, as recommended by the World Health Organization.

Factors related to the quality of life of mothers of children with Congenital Zika Virus Syndrome.

OBJECTIVE: To relate sociodemographic and clinical aspects to the quality of life of mothers of children with Congenital Zika Virus Syndrome. METHOD: Cross-sectional analytical study, conducted in a rehabilitation center in Goiânia, central region of Brazil. A sociodemographic and clinical profile questionnaire and the World Health Organization Quality of Life were used. Data analysis was performed using the Mann-Whitney tests; Kruskal-Wallis, followed by Dunnett's Post hoc; and Spearman's correlation. RESULTS: The sample consisted of 30 mothers of children with Congenital Zika Virus Syndrome, with a mean age of 30.57 ± 6.67 years. Mothers who had a partner, leisure activity, who used a car as a means of transport and who had a child with congenital syndrome with microcephaly had a better quality of life (p<0,05). CONCLUSION: The quality of life of these mothers was related to sociodemographic and clinical aspects, which suggests the need for more specific public policies for this population.

Factors related to the quality of life of mothers of children with Congenital Zika Virus Syndrome / Factores relacionados con la calidad de vida de madres de niños con Síndrome Congénito del Virus Zika / Fatores relacionados à qualidade de vida de mães de crianças com Síndrome Congênita do Zika Virus

ABSTRACT Objective: To relate sociodemographic and clinical aspects to the quality of life of mothers of children with Congenital Zika Virus Syndrome. Method: Cross-sectional analytical study, conducted in a rehabilitation center in Goiânia, central region of Brazil. A sociodemographic and clinical profile questionnaire and the World Health Organization Quality of Life were used. Data analysis was performed using the Mann-Whitney tests; Kruskal-Wallis, followed by Dunnett's Post hoc; and Spearman's correlation. Results: The sample consisted of 30 mothers of children with Congenital Zika Virus Syndrome, with a mean age of 30.57 ± 6.67 years. Mothers who had a partner, leisure activity, who used a car as a means of transport and who had a child with congenital syndrome with microcephaly had a better quality of life (p<0,05). Conclusion: The quality of life of these mothers was related to sociodemographic and clinical aspects, which suggests the need for more specific public policies for this population.

RESUMEN Objetivo: Relacionar aspectos sociodemográficos y clínicos con la calidad de vida de madres de niños con síndrome congénito del virus del Zika. Método: Estudio analítico transversal, realizado en un centro de rehabilitación en Goiânia, región central de Brasil. Se utilizó un cuestionario de perfil sociodemográfico y clínico y el World Health Organization Quality of Life. El análisis de los datos se realizó mediante las pruebas de Mann-Whitney; Kruskal-Wallis, seguida de Posthoc de Dunnett; y correlación de Spearman. Resultados: La muestra estuvo conformada por 30 madres de niños con síndrome congénito del virus del Zika, con una edad promedio de 30.57 ± 6.67 años. Las madres que tenían pareja, actividad de ocio, que usaban el automóvil como medio de transporte y que tenían un hijo con síndrome congénito con microcefalia tenían una mejor calidad de vida (p <0,05). Conclusión: La calidad de vida de estas madres se relacionó con aspectos sociodemográficos y clínicos, lo que sugiere la necesidad de políticas públicas más específicas para esta población.

RESUMO Objetivo: Relacionar aspectos sociodemográficos e clínicos com a qualidade de vida de mães de crianças com Síndrome Congênita do Zika Vírus. Método: Estudo transversal analítico, realizado em um centro de reabilitação de Goiânia, região central do Brasil. Foram utilizados um questionário de perfil sociodemográfico e clínico e o World Health Organization Quality of Life. A análise dos dados foi realizada por meio dos testes Mann-Whitney; Kruskal-Wallis, seguido do Post hoc de Dunnett e correlação de Spearman. Resultados: A amostra foi constituída de 30 mães de crianças com Síndrome Congênita do Zika Vírus, com média de idade de 30,57 ± 6,67 anos. As mães que tinham companheiro, atividade de lazer, que utilizavam carro como meio de transporte e que tinham filho com a síndrome congênita com microcefalia, tiveram melhor qualidade de vida (p<0,05). Conclusão: A qualidade de vida dessas mães teve relação com aspectos sociodemográficos e clínicos, o que sugere necessidade de mais políticas públicas específicas para esta população.

Route of Zika virus infection in Aedes aegypti by transmission electron microscopy.

BACKGROUND: Zika fever has been a global health security threat, especially in the tropical and subtropical regions where most of the cases occur. The disease is caused by Zika virus (ZIKV), which belongs to the family Flaviviridae, genus Flavivirus. The virus is transmitted by Aedes mosquitoes, mostly by Aedes aegypti, during its blood meal. In this study we present a descriptive analysis, by transmission electron microscopy (TEM), of ZIKV infection in A. aegypti elected tissues at the 3rd day of infection. ZIKV vertical transmission experiments by oral infection were conducted to explore an offspring of natural infection. RESULTS: Gut and ovary tissues harbored a higher number of viral particles. The ZIKV genome was also detected, by RT-qPCR technique, in the organism of orally infected female mosquitoes and in their eggs laid. CONCLUSIONS: The data obtained suggest that the ovary is an organ susceptible to be infected with ZIKV and that virus can be transmitted from mother to a fraction of the progeny.

LED Colour Trap for Aedes aegypti Control.

BACKGROUND: Aedes aegypti mosquitoes transmit dengue, zika, and chikungunya viruses, neglected diseases that are considered global health challenges. Due to the lack of antiviral drugs and vaccines for these illnesses, vector control with chemical insecticides is the principal strategy for preventing their spread. However, vector populations are becoming increasingly resistant to insecticides, and the development of other control measures is, therefore, imperative. METHODS: A new insect trap (IT) was used to control Aedes aegypti. A specific light-emitting diode (LED) served as the attractant based on specific wavelength ranges (450-495, 500-550 and 570-600 nm). The IT utilized insect-attracting and killing mechanisms that included a black capture box, a suction-producing mechanism, an electric shock device and a nylon cloth device that held surviving mosquitoes, which died due to starvation. Capture assays of twenty non-feeding females inside a cage were performed in triplicate using different LED intensities. A commercial trap (ultraviolet lamp attractant and suction system) was used as a positive control. RESULTS: Capture assays of A. aegypti with different intensities and LED combinations showed that the tricolored trap captured 100% of the females, followed by the Green LED 8 set, which captured 91%; in comparison, commercial traps captured approximately 25% of the insects. Although there were no significant differences between the experimental groups, the tricolored trap probably will capture more mosquito females considering the vision variation in individual females. CONCLUSION: We herein present a green technology-based IT that is effective, safe and successful for reducing mosquito populations, thereby preventing mosquito-borne disease spread.

Mental disorders, psychopharmacological treatments, and mortality in 2150 COVID-19 Spanish inpatients.

OBJECTIVE: To determine how mental disorders and psychopharmacological treatments before and during COVID-19 hospital admissions are related to mortality. METHODS: Subjects included in the study were all adult patients with a diagnosis of COVID-19, confirmed clinically and by PCR, who were admitted to a tertiary university hospital in Badalona (Spain) between March 1 and November 17, 2020. Data were extracted anonymously from computerized clinical records. RESULTS: 2,150 subjects were included, 57% males, mean age 61 years. History of mental disorders was registered in 957 (45%). Throughout admission, de novo diagnosis of mood or anxiety, stress, or adjustment disorder was made in 12% of patients without previous history. Delirium was diagnosed in 10% of cases. 1011 patients (47%) received a psychotropic prescription during admission (36% benzodiazepines, 22% antidepressants, and 21% antipsychotics). Mortality rate was 17%. Delirium during admission and history of mood disorder were independently associated with higher mortality risk (hazard ratios, 1.39 and 1.52 respectively), while previous year's treatments with anxiolytics/hypnotics and antidepressants were independently associated with lower mortality risk (hazard ratios, 0.47 and 0.43, respectively). CONCLUSION: Mental symptoms are very common in patients hospitalized for COVID-19 infection. Detecting, diagnosing, and treating them is key to determining the prognosis of the disease and functional recovery.

Aedes aegypti post-emergence transcriptome: Unveiling the molecular basis for the hematophagic and gonotrophic capacitation.

The adult females of Aedes aegypti mosquitoes are facultative hematophagous insects but they are unable to feed on blood right after pupae emergence. The maturation process that takes place during the first post-emergence days, hereafter named hematophagic and gonotrophic capacitation, comprises a set of molecular and physiological changes that prepare the females for the first gonotrophic cycle. Notwithstanding, the molecular bases underlying mosquito hematophagic and gonotrophic capacitation remain obscure. Here, we investigated the molecular and biochemical changes in adult Ae. aegypti along the first four days post-emergence, prior to a blood meal. We performed a RNA-Seq analysis of the head and body, comparing male and female gene expression time courses. A total of 811 and 203 genes were differentially expressed, respectively in the body and head, and both body parts showed early, mid, and late female-specific expression profiles. Female-specific up-regulation of genes involved in muscle development and the oxidative phosphorylation pathway were remarkable features observed in the head. Functional assessment of mitochondrial oxygen consumption in heads showed a gradual increase in respiratory capacity and ATP-linked respiration as a consequence of induced mitochondrial biogenesis and content over time. This pattern strongly suggests that boosting oxidative phosphorylation in heads is a required step towards blood sucking habit. Several salivary gland genes, proteases, and genes involved in DNA replication and repair, ribosome biogenesis, and juvenile hormone signaling were up-regulated specifically in the female body, which may reflect the gonotrophic capacitation. This comprehensive description of molecular and biochemical mechanisms of the hematophagic and gonotrophic capacitation in mosquitoes unravels potentially new targets for vector control.

Current and potential biotechnological applications of odorant-binding proteins.

Odorant-binding proteins (OBPs) are small soluble proteins whose biological function is believed to be facilitating olfaction by assisting the transport of volatile chemicals in both vertebrate and insect sensory organs, where they are secreted. Their capability to interact with a broad range of hydrophobic compounds combined with interesting features such as being small, stable, and easy to produce and modify, makes them suitable targets for applied research in various industrial segments, including textile, cosmetic, pesticide, and pharmaceutical, as well as for military, environmental, health, and security field applications. In addition to reviewing already established biotechnological applications of OBPs, this paper also discusses their potential use in prospecting of new technologies. The development of new products for insect population management is currently the most prevailing use for OBPs, followed by biosensor technology, an area that has recently seen a significant increase in studies evaluating their incorporation into sensing devices. Finally, less typical approaches include applications in anchorage systems and analytical tools. KEY POINTS: • Odorant-binding proteins (OBPs) present desired characteristics for applied research. • OBPs are mainly used for developing new products for insect population control. • Incorporation of OBPs into chemosensory devices is a growing area of study. • Less conventional uses for OBPs include anchorage systems and analytical purposes. Graphical Abstract.

Phylogenetic analysis of the ATP-binding cassette proteins suggests a new ABC protein subfamily J in Aedes aegypti (Diptera: Culicidae).

BACKGROUND: We performed an in-depth analysis of the ABC gene family in Aedes aegypti (Diptera: Culicidae), which is an important vector species of arthropod-borne viral infections such as chikungunya, dengue, and Zika. Despite its importance, previous studies of the Arthropod ABC family have not focused on this species. Reports of insecticide resistance among pests and vectors indicate that some of these ATP-dependent efflux pumps are involved in compound traffic and multidrug resistance phenotypes. RESULTS: We identified 53 classic complete ABC proteins annotated in the A. aegypti genome. A phylogenetic analysis of Aedes aegypti ABC proteins was carried out to assign the novel proteins to the ABC subfamilies. We also determined 9 full-length sequences of DNA repair (MutS, RAD50) and structural maintenance of chromosome (SMC) proteins that contain the ABC signature. CONCLUSIONS: After inclusion of the putative ABC proteins into the evolutionary tree of the gene family, we classified A. aegypti ABC proteins into the established subfamilies (A to H), but the phylogenetic positioning of MutS, RAD50 and SMC proteins among ABC subfamilies-as well as the highly supported grouping of RAD50 and SMC-prompted us to name a new J subfamily of A. aegypti ABC proteins.

RNAi-based bioinsecticide for Aedes mosquito control.

Zika virus infection and dengue and chikungunya fevers are emerging viral diseases that have become public health threats. Their aetiologic agents are transmitted by the bite of genus Aedes mosquitoes. Without effective therapies or vaccines, vector control is the main strategy for preventing the spread of these diseases. Increased insecticide resistance calls for biorational actions focused on control of the target vector population. The chitin required for larval survival structures is a good target for biorational control. Chitin synthases A and B (CHS) are enzymes in the chitin synthesis pathway. Double-stranded RNA (dsRNA)-mediated gene silencing (RNAi) achieves specific knockdown of target proteins. Our goal in this work, a new proposed RNAi-based bioinsecticide, was developed as a potential strategy for mosquito population control. DsRNA molecules that target five different regions in the CHSA and B transcript sequences were produced in vitro and in vivo through expression in E. coli HT115 and tested by direct addition to larval breeding water. Mature and immature larvae treated with dsRNA targeting CHS catalytic sites showed significantly decreased viability associated with a reduction in CHS transcript levels. The few larval and adult survivors displayed an altered morphology and chitin content. In association with diflubenzuron, this bioinsecticide exhibited insecticidal adjuvant properties.

Reverse chemical ecology-based approach leading to the accidental discovery of repellents for Rhodnius prolixus, a vector of Chagas diseases refractory to DEET.

Rhodnius prolixus is one of the most important vectors of Chagas disease in Central and South America for which repellents and attractants are sorely needed. Repellents like DEET, picaridin, and IR3535 are widely used as the first line of defense against mosquitoes and other vectors, but they are ineffective against R. prolixus. Our initial goal was to identify in R. prolixus genome odorant receptors sensitive to putative sex pheromones. We compared gene expression of 21 ORs in the R. prolixus genome, identified 4 ORs enriched in male (compared with female) antennae. Attempts to de-orphanize these ORs using the Xenopus oocyte recording system showed that none of them responded to putative sex pheromone constituents. One of the them, RproOR80, was sensitive to 4 compounds in our panel of 109 odorants, namely, 2-heptanone, γ-octalactone, acetophenone, and 4-methylcychohexanol. Interestingly, these compounds, particularly 4-methylcyclohexanol, showed strong repellency activity as indicated not only by a significant decrease in residence time close to a host, but also by a remarkable reduction in blood intake. 4-Methylcyclohexanol-elicited repellency activity was abolished in RNAi-treated insects. In summary, our search for pheromone receptors led to the discovery of repellents for R. prolixus.

Functional Characterization of Odorant Binding Protein 27 (RproOBP27) From Rhodnius prolixus Antennae.

Olfactory proteins mediate a wide range of essential behaviors for insect survival. Odorant binding proteins (OBPs) are small soluble olfactory proteins involved in the transport of odor molecules (=odorants) through the sensillum lymph to odorant receptors, which are housed on the dendritic membrane of olfactory sensory neurons also known as olfactory receptor neurons. Thus, a better understanding of the role(s) of OBPs from Rhodnius prolixus, one of the main vectors of Chagas disease, may ultimately lead to new strategies for vector management. Here we aimed at functionally characterize OBPs from R. prolixus. Genes of interest were selected using conventional bioinformatics approaches and subsequent quantification by qPCR. We screened and estimated expression in different tissues of 17 OBPs from R. prolixus adults. These analyses showed that 11 OBPs were expressed in all tissues, whereas six OBP genes were specific to antennae. Two OBP genes, RproOBP6 and RproOBP13, were expressed in both male and female antennae thus suggesting that they might be involved in the recognition of semiochemicals mediating behaviors common to both sexes, such host finding (for a blood meal). Transcripts for RproOBP17 and RproOBP21 were enriched in female antennae and possibly involved in the detection of oviposition attractants or other semiochemicals mediating female-specific behaviors. By contrast, RproOBP26 and RproOBP27 might be involved in the reception of sex pheromones given that their transcripts were highly expressed in male antennae. To test this hypothesis, we silenced RproOBP27 using RNAi and examined the sexual behavior of the phenotype. Indeed, adult males treated with dsOBP27 spent significantly less time close to females as compared to controls. Additionally, docking analysis suggested that RproOBP27 binds to putative sex pheromones. We therefore concluded that RproOBP27 might be a pheromone-binding protein.

History, epidemiology and diagnostics of dengue in the American and Brazilian contexts: a review.

Dengue virus (DENV), an arbovirus transmitted by mosquitoes, has become a major threat to American human life, reaching approximately 23 million cases from 1980 to 2017. Brazil is among the countries most affected by this terrible viral disease, with 13.6 million cases. DENV has four different serotypes, DENV1-4, which show a broad clinical spectrum. Dengue creates a staggering epidemiological and economic burden for endemic countries. Without a specific therapy and with a commercial vaccine that presents some problems relative to its full effectiveness, initiatives to improve vector control strategies, early disease diagnostics and the development of vaccines and antiviral drugs are priorities. In this study, we present the probable origins of dengue in America and the trajectories of its spread. Overall, dengue diagnostics are costly, making the monitoring of dengue epidemiology more difficult and affecting physicians' therapeutic decisions regarding dengue patients, especially in developing countries. This review also highlights some recent and important findings regarding dengue in Brazil and the Americas. We also summarize the existing DENV polymerase chain reaction (PCR) diagnostic tests to provide an improved reference since these tests are useful and accurate at discriminating DENV from other flaviviruses that co-circulate in the Americas. Additionally, these DENV PCR assays ensure virus serotyping, enabling epidemiologic monitoring.

Proteomic analysis of the kissing bug Rhodnius prolixus antenna.

Reception of odorants is essential in insects' life since the chemical signals in the environment (=semiochemicals) convey information about availability of hosts for a blood meal, mates for reproduction, sites for oviposition and other relevant information for fitness in the environment. Once they reach the antennae, these semiochemicals bind to odorant-binding proteins and are transported through the sensillar lymph until reach the odorant receptors. Such perireceptor events, particularly the interactions with transport proteins, are the liaison between the external environment and the entire neuroethological system and, therefore, a potential target to disrupt insect chemical communication. In this study, a proteomic profile of female and male antennae of Rhodnius prolixus, a vector of Chagas disease, was obtained in an attempt to unravel the entire repertoire of olfactory proteins involved in perireceptor events. Using shotgun proteomics and two-dimensional gel electrophoresis approaches followed by nano liquid chromatography coupled with tandem LTQ Velos Orbitrap mass spectrometry, we have identified 581 unique proteins. Putative olfactory proteins, including 17 odorant binding proteins, 6 chemosensory proteins, 2 odorant receptors, 3 transient receptor channels and 1 gustatory receptor were identified. Proteins involved in general cellular functions such as generation of precursor metabolites, energy generation and catabolism were expressed at high levels. Additionally, proteins that take part in signal transduction, ion binding, and stress response, kinase and oxidoreductase activity were frequent in antennae from both sexes. This proteome strategy unraveled for the first time the complex nature of perireceptor and other olfactory events that occur in R. prolixus antennae, including evidence for phosphorylation of odorant-binding and chemosensory proteins. These findings not only increase our understanding of the olfactory process in triatomine species, but also identify potential molecular targets to be explored for population control of such insect vectors.

Determinantes socioeconômicos e gestacionais do peso ao nascer de crianças nascidas a termo / Socioeconomic and gestational determinants of birth weight of term infants

Objetivo: Identificar os fatores sociais e gestacionais associados ao peso ao nascer de crianças nascidas a termo. Métodos: Trata-se de estudo transversal realizado entre setembro de 2004 e julho de 2005. As informações foram obtidas por meio da Declaração de Nascidos Vivos e de visita domiciliar subsequente ao nascimento da criança. Resultados: O peso médio ao nascer na amostra estudada foi de 3,146 (±375 g), sendo que a incidência de nascidos vivos com baixo peso ao nascer foi de 7,5%. Observou-se, na análise multivariada, que crianças do gênero feminino, idade materna inferior a 19 anos, o hábito de fumar durante a gestação e maior aglomeração de pessoas no domicílio associaram se significantemente com menor média de peso ao nascer. A diferença mais expressiva ocorreu entre as crianças cujas mães eram tabagistas, com uma média de peso dessas crianças menor que 258grs quando comparadas com mães não tabagistas (p=0,001). De forma conjunta, esses fatores responderam por 16% da variação do peso ao nascer. Conclusão: Considera-se necessário maior investimento na atenção básica, na tentativa de reduzir o número de gestantes adolescentes e do hábito de fumar durante a gestação, dentre outros fatores relevantes para a saúde do recém-nascido (AU)

Objective: To identify the social and gestational factors associated with birth weight of full-term newborns. Methods: A cross-sectional study was conducted between September 2004 and July 2005. The information was obtained through the Statement of Live Birth and subsequent home visit after the child's birth. Results: The mean birth weight in the sample was 3,146 (± 375 grams), and the incidence of low birth weight was 7.5%. In the multivariate analysis female children, maternal age less than 19 years, smoking during pregnancy and greater overcrowding in the home were associated with significantly lower mean birth weight. The most significant difference was seen among children whose mothers were smokers, with a mean birth weight less than 258grs compared to nonsmoking mothers (p = 0.001). Jointly, these factors accounted for 16% of the variation in birth weight. Conclusion: Greater investment in primary care is required, in an attempt to reduce the number of adolescent pregnancies and smoking during pregnancy, among other factors relevant to the health of the newborn. (AU)

A look inside odorant-binding proteins in insect chemoreception.

Detection of chemical signals from the environment through olfaction is an indispensable mechanism for maintaining an insect's life, evoking critical behavioral responses. Among several proteins involved in the olfactory perception process, the odorant binding protein (OBP) has been shown to be essential for a normally functioning olfactory system. This paper discusses the role of OBPs in insect chemoreception. Here, structural aspects, mechanisms of action and binding affinity of such proteins are reviewed, as well as their promising application as molecular targets for the development of new strategies for insect population management and other technological purposes.

Comparative proteome analysis reveals that blood and sugar meals induce differential protein expression in Aedes aegypti female heads.

Aedes aegypti females ingest sugar or blood to obtain the nutrients needed to maintain cellular homeostasis. During human blood ingestion, female mosquitoes may transmit different viruses such as dengue, yellow fever and, more recently, zika and chikungunya. Here, we report changes in protein expression in the heads of adult female Ae. aegypti mosquitoes in response to the ingestion of blood or sugar. Proteins extracted from the heads of Ae. aegypti fed exclusively on blood (BF) or sugar (SF) were trypsin hydrolyzed (off-gel) and analyzed by the reverse-phase nano-liquid chromatography coupled with hybrid mass spectrometry. A total of 1139 proteins were identified in female heads, representing 7.4% of the predicted proteins in Ae. aegypti genome (total = 15 419 active genes). Gene ontology annotation and categories showed that, in this insect, the head was rich in proteins involved in the metabolic process, proton transport, organelle, macromolecular complex, structural molecule activity, antioxidant activity, and catalytic activity. Our report is the first indicating that many of the annotated genes are translated into functional proteins in heads of adult female Ae. aegypti. Interestingly, we identified 8.7 times more exclusively expressed proteins involved in signal transduction, replication-transcription-translation (5.5 x), and transport (2.9 x) activity in BF than in SF groups. This paper discusses the protein profile of Ae. aegypti female heads and its implications for blood ingestion and carbohydrate intake.