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Lizana P, Mutis A, Palma-Millanao R, González-González A, Ceballos R, Quiroz A, Bardehle L, Hidalgo A, Torres F, Romero-López A, Venthur H. Comparative transcriptomic analysis of chemoreceptors in two sympatric scarab beetles, Hylamorpha elegans and Brachysternus prasinus. Comp Biochem Physiol Part D Genomics Proteomics 2024; 49:101174. [PMID: 38096641 DOI: 10.1016/j.cbd.2023.101174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Revised: 12/06/2023] [Accepted: 12/07/2023] [Indexed: 02/15/2024]
Abstract
Chemoreception through odorant receptors (ORs), ionotropic receptors (IRs) and gustatory receptors (GRs) represents the functions of key proteins in the chemical ecology of insects. Recent studies have identified chemoreceptors in coleopterans, facilitating the evolutionary analysis of not only ORs but also IRs and GRs. Thus, Cerambycidae, Tenebrionidae and Curculionidae have received increased attention. However, knowledge of the chemoreceptors from Scarabaeidae is still limited, particularly for those that are sympatric. Considering the roles of chemoreceptors, this analysis could shed light on evolutionary processes in the context of sympatry. Therefore, the aim of this study was to identify and compare the repertoires of ORs, GRs and IRs between two sympatric scarab beetles, Hylamorpha elegans and Brachysternus prasinus. Here, construction of the antennal transcriptomes of both scarab beetle species and analyses of their phylogeny, molecular evolution and relative expression were performed. Thus, 119 new candidate chemoreceptors were identified for the first time, including 17 transcripts for B. prasinus (1 GR, 3 IRs and 13 ORs) and 102 for H. elegans (22 GRs, 14 IRs and 66 ORs). Orthologs between the two scarab beetle species were found, revealing specific expansions as well as absence in some clades. Purifying selection appears to have occurred on H. elegans and B. prasinus ORs. Further efforts will be focused on target identification to characterize kairomone and/or pheromone receptors.
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Affiliation(s)
- Paula Lizana
- Programa de Doctorado en Ciencias de Recursos Naturales, Universidad de La Frontera, Temuco, Chile; Departamento de Ciencias Químicas y Recursos Naturales, Facultad de Ingeniería y Ciencias, Universidad de La Frontera, Temuco, Chile
| | - Ana Mutis
- Departamento de Ciencias Químicas y Recursos Naturales, Facultad de Ingeniería y Ciencias, Universidad de La Frontera, Temuco, Chile; Centro de Investigación Biotecnológica Aplicada al Medio Ambiente (CIBAMA), Universidad de La Frontera, Temuco, Chile
| | - Rubén Palma-Millanao
- Vicerrectoría de Investigación y Postgrado, Universidad de La Frontera, Temuco, Chile
| | - Angélica González-González
- Laboratorio de Interacciones Insecto-Planta, Instituto de Ciencias Biológicas, Universidad de Talca, Casilla 747, Talca, Chile
| | - Ricardo Ceballos
- Laboratorio de Ecología Química, Centro Tecnológico de Control Biológico, Instituto de Investigaciones Agropecuarias (INIA)-Quilamapu, Chillán, Chile
| | - Andrés Quiroz
- Departamento de Ciencias Químicas y Recursos Naturales, Facultad de Ingeniería y Ciencias, Universidad de La Frontera, Temuco, Chile; Centro de Investigación Biotecnológica Aplicada al Medio Ambiente (CIBAMA), Universidad de La Frontera, Temuco, Chile
| | - Leonardo Bardehle
- Departamento de Producción Agropecuaria, Facultad de Ciencias Agropecuarias y Forestales, Universidad de La Frontera, Temuco, Chile
| | - Alejandro Hidalgo
- Departamento de Ciencias Preclínicas, Facultad de Medicina, Universidad de La Frontera, Temuco, Chile
| | - Fernanda Torres
- Carrera de Química y Farmacia, Facultad de Medicina, Universidad de La Frontera, Temuco, Chile
| | - Angel Romero-López
- Laboratorio de Infoquímicos y Otros Productos Bióticos, Facultad de Ciencias Biológicas, Benemérita Universidad Autónoma de Puebla, Mexico
| | - Herbert Venthur
- Departamento de Ciencias Químicas y Recursos Naturales, Facultad de Ingeniería y Ciencias, Universidad de La Frontera, Temuco, Chile; Centro de Investigación Biotecnológica Aplicada al Medio Ambiente (CIBAMA), Universidad de La Frontera, Temuco, Chile.
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Lizana P, Godoy R, Martínez F, Wicher D, Kaltofen S, Guzmán L, Ramírez O, Cifuentes D, Mutis A, Venthur H. A highly conserved plant volatile odorant receptor detects a sex pheromone component of the greater wax moth, Galleria mellonella (Lepidoptera: Pyralidae). Insect Biochem Mol Biol 2023; 163:104031. [PMID: 37918449 DOI: 10.1016/j.ibmb.2023.104031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Revised: 10/26/2023] [Accepted: 10/28/2023] [Indexed: 11/04/2023]
Abstract
Odorant receptors (ORs) are key specialized units for mate and host finding in moths of the Ditrysia clade, to which 98% of the lepidopteran species belong. Moth ORs have evolved to respond to long unsaturated acetates, alcohols, or aldehydes (Type I sex pheromones), falling into conserved clades of pheromone receptors (PRs). These PRs might have evolved from old lineages of non-Ditrysian moths that use plant volatile-like pheromones. However, a Ditrysian moth called the greater wax moth, Galleria mellonella (a worldwide-distributed pest of beehives), uses C9-C11 saturated aldehydes as the main sex pheromone components (i.e., nonanal and undecanal). Thus, these aldehydes represent unusual components compared with the majority of moth species that use, for instance, Type I sex pheromones. Current evidence shows a lack of consensus in the amount of ORs for G. mellonella, although consistent in that the moth does not have conserved PRs. Using genomic data, 62 OR candidates were identified, 16 being new genes. Phylogeny showed no presence of ORs in conserved PR clades. However, an OR with the highest transcript abundance, GmelOR4, appeared in a conserved plant volatile-detecting clade. Functional findings from the HEK system showed the OR as sensitive to nonanal and 2-phenylacetaldehyde, but not to undecanal. It is believed that to date GmelOR4 represents the first, but likely not unique, OR with a stable function in detecting aldehydes that help maintain the life cycle of G. mellonella around honey bee colonies.
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Affiliation(s)
- Paula Lizana
- Programa de Doctorado en Ciencias de Recursos Naturales, Universidad de La Frontera, Temuco, Chile; Laboratorio de Química Ecológica, Departamento de Ciencias Químicas y Recursos Naturales, Facultad de Ingeniería y Ciencias, Universidad de La Frontera, Temuco, Chile
| | - Ricardo Godoy
- Laboratorio de Química Ecológica, Departamento de Ciencias Químicas y Recursos Naturales, Facultad de Ingeniería y Ciencias, Universidad de La Frontera, Temuco, Chile
| | - Francheska Martínez
- Laboratorio de Química Ecológica, Departamento de Ciencias Químicas y Recursos Naturales, Facultad de Ingeniería y Ciencias, Universidad de La Frontera, Temuco, Chile; Carrera de Bioquímica, Departamento de Ciencias Químicas y Recursos Naturales, Facultad de Ingeniería y Ciencias, Universidad de La Frontera, Temuco, Chile
| | - Dieter Wicher
- Max Planck Institute for Chemical Ecology, Department of Evolutionary Neuroethology, 07745, Jena, Germany
| | - Sabine Kaltofen
- Max Planck Institute for Chemical Ecology, Department of Evolutionary Neuroethology, 07745, Jena, Germany
| | - Leonardo Guzmán
- Departamento de Fisiología, Facultad de Ciencias Biológicas, Universidad de Concepción, Concepción, Chile
| | - Oscar Ramírez
- Departamento de Fisiología, Facultad de Ciencias Biológicas, Universidad de Concepción, Concepción, Chile
| | - Diego Cifuentes
- Departamento de Fisiología, Facultad de Ciencias Biológicas, Universidad de Concepción, Concepción, Chile
| | - Ana Mutis
- Centro de Investigación Biotecnológica Aplicada al Medio Ambiente (CIBAMA), Universidad de La Frontera, Temuco, Chile; Laboratorio de Química Ecológica, Departamento de Ciencias Químicas y Recursos Naturales, Facultad de Ingeniería y Ciencias, Universidad de La Frontera, Temuco, Chile
| | - Herbert Venthur
- Centro de Investigación Biotecnológica Aplicada al Medio Ambiente (CIBAMA), Universidad de La Frontera, Temuco, Chile; Laboratorio de Química Ecológica, Departamento de Ciencias Químicas y Recursos Naturales, Facultad de Ingeniería y Ciencias, Universidad de La Frontera, Temuco, Chile.
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Venthur H, Lizana P, Manosalva L, Rojas V, Godoy R, Rocha A, Aguilera I, Palma-Millanao R, Fajardo V, Quiroz A, Mutis A. Analysis of glutathione-S-transferases from larvae of Galleria mellonella (Lepidoptera, Pyralidae) with potential alkaloid detoxification function. Front Physiol 2022; 13:989006. [PMID: 36148307 PMCID: PMC9486002 DOI: 10.3389/fphys.2022.989006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Accepted: 08/12/2022] [Indexed: 11/13/2022] Open
Abstract
The greater wax moth, Galleria mellonella, is a global pest for beehives, doing damage in the larval stage. Although a significant number of studies have reported on larvae and adults, to date no effective pest control has been implemented. In this study, we tested larval resistance to alkaloids from Berberis microphylla, and the objective was to identify enzymes that participate in alkaloid detoxification through enzymatic assays, bioinformatics analysis and qRT-PCR. Findings suggest glutathione-S-transferases (GSTs), from an increased metabolic mechanism, are responsible for alkaloid detoxification rather than cytochrome P450 (CYP), carboxylesterases (CarE). A bioinformatics analysis from transcriptome data revealed 22 GSTs present in both G. mellonella larvae and adults. The qRT-PCR experiments corroborated the presence of the 22 GSTs in larvae, where GST8 and GST20 stood out with the highest expression after berberine treatment. Structural information around GST8 and GST20 suggests that GST8 could bind berberine stronger than GST20. These findings represent an important advance in the study of detoxification enzymes in G. mellonella, expanding the role of delta-class GSTs towards alkaloids. Likewise, GST inhibition by alkaloid analogs is proposed in the framework of integrated pest management strategies.
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Affiliation(s)
- Herbert Venthur
- Departamento de Ciencias Químicas y Recursos Naturales, Facultad de Ingeniería y Ciencias, Universidad de La Frontera, Temuco, Chile
- Centro de Investigación Biotecnológica Aplicada al Medio Ambiente, CIBAMA, Universidad de La Frontera, Temuco, Chile
| | - Paula Lizana
- Programa de Doctorado en Ciencias de Recursos Naturales, Universidad de La Frontera, Temuco, Chile
| | - Loreto Manosalva
- Facultad de Ciencias, Universidad de Magallanes, Punta Arenas, Chile
| | - Valentina Rojas
- Programa de Doctorado en Ciencias de Recursos Naturales, Universidad de La Frontera, Temuco, Chile
| | - Ricardo Godoy
- Programa de Doctorado en Ciencias de Recursos Naturales, Universidad de La Frontera, Temuco, Chile
| | - Adonis Rocha
- Carrera de Bioquímica, Departamento de Ciencias Químicas y Recursos Naturales, Universidad de La Frontera, Temuco, Chile
| | - Iván Aguilera
- Carrera de Bioquímica, Departamento de Ciencias Químicas y Recursos Naturales, Universidad de La Frontera, Temuco, Chile
| | - Rubén Palma-Millanao
- Laboratorio de Ciencias de Insectos, Instituto de Investigaciones Agropecuarias, INIA, Vilcún, Chile
| | - Victor Fajardo
- Facultad de Ciencias, Universidad de Magallanes, Punta Arenas, Chile
| | - Andrés Quiroz
- Departamento de Ciencias Químicas y Recursos Naturales, Facultad de Ingeniería y Ciencias, Universidad de La Frontera, Temuco, Chile
- Centro de Investigación Biotecnológica Aplicada al Medio Ambiente, CIBAMA, Universidad de La Frontera, Temuco, Chile
| | - Ana Mutis
- Departamento de Ciencias Químicas y Recursos Naturales, Facultad de Ingeniería y Ciencias, Universidad de La Frontera, Temuco, Chile
- Centro de Investigación Biotecnológica Aplicada al Medio Ambiente, CIBAMA, Universidad de La Frontera, Temuco, Chile
- *Correspondence: Ana Mutis,
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Lizana P, Mutis A, Quiroz A, Venthur H. Insights Into Chemosensory Proteins From Non-Model Insects: Advances and Perspectives in the Context of Pest Management. Front Physiol 2022; 13:924750. [PMID: 36072856 PMCID: PMC9441497 DOI: 10.3389/fphys.2022.924750] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Accepted: 06/13/2022] [Indexed: 12/04/2022] Open
Abstract
Nowadays, insect chemosensation represents a key aspect of integrated pest management in the Anthropocene epoch. Olfaction-related proteins have been the focus of studies due to their function in vital processes, such ashost finding and reproduction behavior. Hence, most research has been based on the study of model insects, namely Drosophila melanogaster, Bombyx mori or Tribolium castaneum. Over the passage of time and the advance of new molecular techniques, insects considered non-models have been studied, contributing greatly to the knowledge of insect olfactory systems and enhanced pest control methods. In this review, a reference point for non-model insects is proposed and the concept of model and non-model insects is discussed. Likewise, it summarizes and discusses the progress and contribution in the olfaction field of both model and non-model insects considered pests in agriculture.
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Affiliation(s)
- Paula Lizana
- Programa de Doctorado en Ciencias de Recursos Naturales, Universidad de La Frontera, Temuco, Chile
- Laboratorio de Química Ecológica, Departamento de Ciencias Químicas y Recursos Naturales, Facultad de Ingeniería y Ciencias, Universidad de La Frontera, Temuco, Chile
| | - Ana Mutis
- Laboratorio de Química Ecológica, Departamento de Ciencias Químicas y Recursos Naturales, Facultad de Ingeniería y Ciencias, Universidad de La Frontera, Temuco, Chile
| | - Andrés Quiroz
- Laboratorio de Química Ecológica, Departamento de Ciencias Químicas y Recursos Naturales, Facultad de Ingeniería y Ciencias, Universidad de La Frontera, Temuco, Chile
| | - Herbert Venthur
- Laboratorio de Química Ecológica, Departamento de Ciencias Químicas y Recursos Naturales, Facultad de Ingeniería y Ciencias, Universidad de La Frontera, Temuco, Chile
- *Correspondence: Herbert Venthur,
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Lizana P, Machuca J, Larama G, Quiroz A, Mutis A, Venthur H. Mating-based regulation and ligand binding of an odorant-binding protein support the inverse sexual communication of the greater wax moth, Galleria mellonella (Lepidoptera: Pyralidae). Insect Mol Biol 2020; 29:337-351. [PMID: 32065441 DOI: 10.1111/imb.12638] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2019] [Revised: 02/06/2020] [Accepted: 02/07/2020] [Indexed: 06/10/2023]
Abstract
In moths, sex pheromones play a key role in mate finding. These chemicals are transported in the antennae by odorant-binding proteins (OBPs). Commonly, males encounter conspecific females; therefore, several OBPs are male-biased. Less is known, however, about how the olfactory system of moths has evolved toward inverse sexual communication, ie where females seek males. Therefore, the objective of this study was to identify the profile of OBPs and their expression patterns in the bee hive pest, Galleria mellonella, a moth that uses inverse sexual communication. Here, OBP-related transcripts were identified by an RNA Sequencing (RNA-Seq) approach and analysed through both Reverse Transcription Polymerase Chain Reaction (RT-PCR) in different tissues and quantitative real-time PCR for two states, virgin and postmating. Our results indicate that G. mellonella has 20 OBPs distributed amongst different tissues. Interestingly, 17 of the 20 OBPs were significantly down-regulated after mating in females, whereas only OBP7 was up-regulated. By contrast, 18 OBP transcripts were up-regulated in males after mating. Additionally, binding assays and structural simulations showed general odorant-binding protein 2 (GOBP2) was able to bind sex pheromone components and analogues. These findings suggest a possible role of OBPs, especially GOBPs, in the inverse sexual communication of G. mellonella, with gene expression regulated as a response to mating.
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Affiliation(s)
- P Lizana
- Carrera de Bioquímica, Departamento de Ciencias Químicas y Recursos Naturales, Universidad de La Frontera, Temuco, Chile
- Laboratorio de Química Ecológica, Departamento de Ciencias Químicas y Recursos Naturales, Universidad de La Frontera, Temuco, Chile
| | - J Machuca
- Laboratorio de Química Ecológica, Departamento de Ciencias Químicas y Recursos Naturales, Universidad de La Frontera, Temuco, Chile
| | - G Larama
- Centro de Excelencia de Modelación y Computación Científica, Universidad de La Frontera, Temuco, Chile
| | - A Quiroz
- Laboratorio de Química Ecológica, Departamento de Ciencias Químicas y Recursos Naturales, Universidad de La Frontera, Temuco, Chile
- Centro de Investigación Biotecnológica Aplicada al Medio Ambiente, CIBAMA, Universidad de La Frontera, Temuco, Chile
| | - A Mutis
- Laboratorio de Química Ecológica, Departamento de Ciencias Químicas y Recursos Naturales, Universidad de La Frontera, Temuco, Chile
- Centro de Investigación Biotecnológica Aplicada al Medio Ambiente, CIBAMA, Universidad de La Frontera, Temuco, Chile
| | - H Venthur
- Laboratorio de Química Ecológica, Departamento de Ciencias Químicas y Recursos Naturales, Universidad de La Frontera, Temuco, Chile
- Centro de Investigación Biotecnológica Aplicada al Medio Ambiente, CIBAMA, Universidad de La Frontera, Temuco, Chile
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Godoy R, Aburto C, Lizana P, Venthur H, Palma-Millanao R, Méndez L, Panichini M, Moraga F, Bardehle L, Quiroz A, Mutis A. Antennal Morphology and Localization of a Pheromone-Binding Protein of Lobesia botrana (Denis & Schiffermüller) (Lepidoptera: Tortricidae). Neotrop Entomol 2019; 48:422-432. [PMID: 30414018 DOI: 10.1007/s13744-018-0648-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Accepted: 10/29/2018] [Indexed: 06/08/2023]
Abstract
In the sensory system of insects, olfactory sensilla constitute important functional elements for discriminating odors. Therefore, we used light microscopy and scanning electron microscopy to investigate the morphology and distribution of sensilla in the antennae of Lobesia botrana (Denis & Schiffermüller). In addition, we studied the expression of the gene encoding for pheromone-binding protein 1 (LbotPBP1) by in situ hybridization. Lobesia botrana antennae are filiform and are subdivided into three segments: scape, pedicel, and flagellum. The number of flagellum and their overall length were significantly higher and longer in males than in females. Six morphological types of sensilla (trichodea, chaetica, coeloconica, auricillica, basiconica, and styloconica) were identified on the antennae of both sexes. Trichodea sensilla were the most abundant on the antennae of L. botrana, and three subtypes, discerned by their lengths, were observed. However, sensilla trichodea subtype III was only present in male antennae. Moreover, LbotPBP1 expression was restricted to this type of sensilla, thus confirming its olfactory role, specifically under the context of sexual pheromone perception.
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Affiliation(s)
- R Godoy
- Carrera de Bioquímica, Departamento de Ciencias Químicas y Recursos Naturales, Universidad de La Frontera, La Araucanía, 4811230, Temuco, Chile
- Centro de Investigación Biotecnológica Aplicada al Medio Ambiente (CIBAMA), Universidad de La Frontera, Av. Francisco Salazar 01145, Casilla 54-D, Temuco, Chile
| | - C Aburto
- Carrera de Bioquímica, Departamento de Ciencias Químicas y Recursos Naturales, Universidad de La Frontera, La Araucanía, 4811230, Temuco, Chile
| | - P Lizana
- Carrera de Bioquímica, Departamento de Ciencias Químicas y Recursos Naturales, Universidad de La Frontera, La Araucanía, 4811230, Temuco, Chile
| | - H Venthur
- Centro de Investigación Biotecnológica Aplicada al Medio Ambiente (CIBAMA), Universidad de La Frontera, Av. Francisco Salazar 01145, Casilla 54-D, Temuco, Chile
- Laboratorio de Química Ecológica, Departamento de Ciencias Químicas y Recursos Naturales, Universidad de La Frontera, Araucanía, Temuco, Chile
| | - R Palma-Millanao
- Instituto de Ciencias Biológicas, Millennium Nucleus Centre in Molecular Ecology and Evolutionary Applications in the Agroecosystems, Universidad de Talca, Talca, Chile
| | - L Méndez
- Centro de Investigación Biotecnológica Aplicada al Medio Ambiente (CIBAMA), Universidad de La Frontera, Av. Francisco Salazar 01145, Casilla 54-D, Temuco, Chile
| | - M Panichini
- Instituto de Investigaciones Agropecuarias (INIA Quilamapu), Chillán, Chile
| | - F Moraga
- Doctorado en Ciencias de Recursos Naturales, Facultad de Ingeniería y Ciencias, Universidad de La Frontera, Temuco, Chile
| | - L Bardehle
- Centro de Investigación Biotecnológica Aplicada al Medio Ambiente (CIBAMA), Universidad de La Frontera, Av. Francisco Salazar 01145, Casilla 54-D, Temuco, Chile
- Laboratorio de Química Ecológica, Departamento de Ciencias Químicas y Recursos Naturales, Universidad de La Frontera, Araucanía, Temuco, Chile
- Scientific and Technological Bioresource Nucleus (BIOREN-UFRO), Universidad de La Frontera, Temuco, Chile
| | - A Quiroz
- Centro de Investigación Biotecnológica Aplicada al Medio Ambiente (CIBAMA), Universidad de La Frontera, Av. Francisco Salazar 01145, Casilla 54-D, Temuco, Chile
- Laboratorio de Química Ecológica, Departamento de Ciencias Químicas y Recursos Naturales, Universidad de La Frontera, Araucanía, Temuco, Chile
| | - A Mutis
- Centro de Investigación Biotecnológica Aplicada al Medio Ambiente (CIBAMA), Universidad de La Frontera, Av. Francisco Salazar 01145, Casilla 54-D, Temuco, Chile.
- Laboratorio de Química Ecológica, Departamento de Ciencias Químicas y Recursos Naturales, Universidad de La Frontera, Araucanía, Temuco, Chile.
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Pacheco B, Lizana P, Celhay I. [Clinical differences between suicide and non suicide attempter hospitalized adolescents]. Rev Med Chil 2010; 138:160-167. [PMID: 20461303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
BACKGROUND Suicide is the third cause of death among adolescents in United States and between 5 to 12% of teenagers have a history of suicide attempt. Therefore, suicide is a public health problem in this age group. AIM To compare the clinical characteristics of hospitalized adolescents who attempted suicide with those without a history of suicide attempt. MATERIAL AND METHODS The clinical records of adolescents aged less than 18 years, hospitalized in a psychiatric clinic, were analyzed. Forty six patients aged 15 +/-2 years (72% females) had a history of suicide attempt and were considered cases and 81 patients aged 15 +/-2 years (52% females) did not have a history of suicide attempt and were considered controls. Demographical and clinical characteristics of both groups were compared. Psychiatric diagnoses were based on the Diagnostic and Statistical Manual of Mental Disorders IV (DSMIV). RESULTS No significant differences were found between groups in the length of hospital stay. The most common psychiatric diagnosis was depressive disorder, found in 71 and 35% of suicide and non-suicide attempters, respectively (p < 0.01). Personality diagnosis was deferred in most studied cases. CONCLUSIONS Depression is more common among hospitalized adolescents who attempt suicide.
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Affiliation(s)
- Bernardo Pacheco
- Departamento de Psiquiatría, Facultad de Medicina, Pontificia Universidad Católica de ChileSantiago, Chile.
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Cordella P, Castro L, Díaz C, Zavala C, Lizana P. Las madres de adolescentes y jóvenes chilenos con trastornos alimentarios. Rev Med Chil 2009. [DOI: 10.4067/s0034-98872009000600008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Cordella P, Castro L, Díaz C, Zavala C, Lizana P. [Eating disorders inventory scores among mothers of adolescents with and without eating disorders]. Rev Med Chil 2009; 137:785-790. [PMID: 19746280] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
BACKGROUND Parents have a control role in the development and treatment of eating disorders among teenagers. AIM To compare attitudes, beliefs and behaviors between mothers of patients with eating disorders and mothers of teenagers without these disorders. MATERIAL AND METHODS Twenty one mother-sibling pairs of adolescents with eating disorders and 15 pairs of adolescents without this condition, but of similar age, were studied. The eating disorders inventory (EDI-2), a self administered questionnaire that includes 91 items, was applied. RESULTS No differences in any of the subscales of EDI-2 were observed between mothers of teenagers with or without eating disorders. No differences in perfectionism, maturity fears, impulsivity and interpersonal distrust were observed between adolescents with and without eating disorders. The latter had a lesser drive for thinness and inefficacy. CONCLUSIONS In this sample, no differences in behaviors, attitudes and beliefs about food, were observed between mothers of adolescents with and without eating disorders.
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Affiliation(s)
- Patricia Cordella
- Unidad de Trastornos de Alimentación, Departamento de Psiquiatría, Escuela de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile.
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Cordella P, Lizana P, Urrejola P, Figueroa D, del Río P, Hodgson I, San Martín C, Unger C. [Program of eating disorders in Chilean adolescents and young adults: six months outcome]. Rev Med Chil 2006; 134:973-80. [PMID: 17130984 DOI: 10.4067/s0034-98872006000800005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
BACKGROUND Eating disorders may have serious organic consequences derived from under nutrition, specific nutrient deficiencies and electrolytic disturbances and reach a mortality as high as 12%. AIM To describe the features and outcome after six months of treatment of patients attending the Eating Disorders Unit at the Catholic University Hospital in Chile. MATERIAL AND METHODS Review of medical records of patients with eating disorders that received a multidisciplinary treatment by a team of nutritionists, psychiatrists and psychologists and were seen at least twice in a period of six months. RESULTS The records of 81 patients (mean age 16.3+/-3 years, only one male) were included in the review. Forty nine patients had Anorexia Nervosa of the restricting type, five of the purging type, 22 had Bulimia Nervosa of the purging type and two of the non purging type and three patients had an eating disorder not otherwise specified. Eighty percent consulted within the first year of symptom appearance. Sixty five percent came from families with both parents living together, 57% had a rigid and agglutinated family structure and 65% had occult crises. Depression or dysthymia was found in 45% of patients and drug therapy was required at the beginning of treatment in 25%. Obsessive traits (40.4%) were significantly related to restrictive eaters. A past history of obesity or overweight was common. After six months of treatment, body mass index increasing significantly in restrictive eaters with obsessive traits and occult family crises was noticed. CONCLUSIONS A multidisciplinary therapeutic intervention improved body mass index and family symptoms in patients with restrictive eating disorders.
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Affiliation(s)
- Patricia Cordella
- Programa Trastornos de Alimentación, Pontificia Universidad Católica de Chile, Chile.
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