RESUMO
PURPOSE: The service configuration with distinct child and adolescent mental health services (CAMHS) and adult mental health services (AMHS) may be a barrier to continuity of care. Because of a lack of transition policy, CAMHS clinicians have to decide whether and when a young person should transition to AMHS. This study describes which characteristics are associated with the clinicians' advice to continue treatment at AMHS. METHODS: Demographic, family, clinical, treatment, and service-use characteristics of the MILESTONE cohort of 763 young people from 39 CAMHS in Europe were assessed using multi-informant and standardized assessment tools. Logistic mixed models were fitted to assess the relationship between these characteristics and clinicians' transition recommendations. RESULTS: Young people with higher clinician-rated severity of psychopathology scores, with self- and parent-reported need for ongoing treatment, with lower everyday functional skills and without self-reported psychotic experiences were more likely to be recommended to continue treatment. Among those who had been recommended to continue treatment, young people who used psychotropic medication, who had been in CAMHS for more than a year, and for whom appropriate AMHS were available were more likely to be recommended to continue treatment at AMHS. Young people whose parents indicated a need for ongoing treatment were more likely to be recommended to stay in CAMHS. CONCLUSION: Although the decision regarding continuity of treatment was mostly determined by a small set of clinical characteristics, the recommendation to continue treatment at AMHS was mostly affected by service-use related characteristics, such as the availability of appropriate services.
Assuntos
Transtornos Mentais , Serviços de Saúde Mental , Adolescente , Adulto , Criança , Demografia , Família , Humanos , Transtornos Mentais/diagnóstico , Transtornos Mentais/epidemiologia , Transtornos Mentais/terapia , PaisRESUMO
Transition in mental health care is the process ensuring continuity of care of a young patient arriving at the CAMHS (Child and Adolescent Mental Health Service) age boundary within mental health services. Transition refers to a transfer to an adult mental health service (AMHS), to private care or other mental health community services. A transition plan can also lead to a managed end of specialized care with involvement of a general practitioner or social services. For young people with a diagnosis of ADHD (Attention Deficit Hyperactivity Disorder) or ASD (Autism Spectrum Disorder), two disorders that persist into adulthood, an optimal transition would ensure continuity of care or facilitate access to specialized care in the case of a discharge. Transition typically occurs during adolescence, a known sensitive period when young people may experience major changes at several levels: physiological, psychological and social. Any barrier in the transition process resulting in discontinuity of care may worsen the symptoms of ADHD or ASD and can ultimately adversely affect the global mental health of young people with such neurodevelopmental disorders. The objectives of this narrative review are: 1/to identify the barriers in the transition process in mental health services often faced by young people with these two disorders; 2/to highlight specific recommendations for strengthening the CAMHS-AMHS interface that have been proposed by various countries in Europe.
Assuntos
Transtorno do Deficit de Atenção com Hiperatividade , Transtorno do Espectro Autista , Transição para Assistência do Adulto , Adolescente , Adulto , Transtorno do Deficit de Atenção com Hiperatividade/epidemiologia , Transtorno do Deficit de Atenção com Hiperatividade/psicologia , Transtorno do Deficit de Atenção com Hiperatividade/terapia , Transtorno do Espectro Autista/epidemiologia , Transtorno do Espectro Autista/terapia , Criança , Europa (Continente) , Humanos , Saúde MentalRESUMO
One hundred and seventy one-day-old female broiler chicks were randomly divided into three groups fed with different dietary treatments: basal control diet (C); C supplemented (2 g/kg) with an oregano aqueous extract (O); C supplemented (150 mg/kg) with vitamin E (E). Growth performance was evaluated at 21 (T1) and 42 days (T2). On the same days, morphological, histochemical and microbiological analyses were performed. The O group showed the highest (p < 0.01) body weight at T1, while no differences were observed at T2. Light microscopic observation and conventional histochemistry showed no differences with regard to the two sampling times, whereas significant differences emerged among the treatments. The O treatment generally enhanced goblet cell reactivity more than both the C and E treatments. Coliform count was lower in the ileum tract of the O group at both T1 and T2 (p < 0.05) and increased with age in all groups. Escherichia coli showed the lowest values in the caecum of the O group (p < 0.001) at both sampling times. Enterococci, lactobacilli and staphylococci populations showed no differences among the different experimental groups in the caecum. In the ileum, the O group did not exhibit the sharp decline (p < 0.001) in the lactic acid bacteria population observed in the other two experimental groups. In conclusion, oregano aqueous extract supplementation seemed to elicit the best response among treatments, enabling better growth performance, enhancing both the quantity and quality of glycoconjugates involved in indirect defence actions and significantly reducing both the coliform and E. coli counts.
Assuntos
Carboidratos/química , Galinhas , Intestinos/microbiologia , Origanum/química , Extratos Vegetais/química , Vitamina E/química , Ração Animal/análise , Fenômenos Fisiológicos da Nutrição Animal , Animais , Dieta/veterinária , FemininoRESUMO
Previous research suggests that parental psychopathology predicts suicidal behavior among offspring; however, the more fine-grained associations between specific parental disorders and distinct stages of the pathway to suicide are not well understood. We set out to test the hypothesis that parental disorders associated with negative mood would predict offspring suicide ideation, whereas disorders characterized by impulsive aggression (for example, antisocial personality) and anxiety/agitation (for example, panic disorder) would predict which offspring act on their suicide ideation and make a suicide attempt. Data were collected during face-to-face interviews conducted on nationally representative samples (N=55 299; age 18+) from 21 countries around the world. We tested the associations between a range of parental disorders and the onset and persistence over time (that is, time since most recent episode controlling for age of onset and time since onset) of subsequent suicidal behavior (suicide ideation, plans and attempts) among offspring. Analyses tested bivariate and multivariate associations between each parental disorder and distinct forms of suicidal behavior. Results revealed that each parental disorder examined increased the risk of suicide ideation among offspring, parental generalized anxiety and depression emerged as the only predictors of the onset and persistence (respectively) of suicide plans among offspring with ideation, whereas parental antisocial personality and anxiety disorders emerged as the only predictors of the onset and persistence of suicide attempts among ideators. A dose-response relation between parental disorders and respondent risk of suicide ideation and attempt was also found. Parental death by suicide was a particularly strong predictor of persistence of suicide attempts among offspring. These associations remained significant after controlling for comorbidity of parental disorders and for the presence of mental disorders among offspring. These findings should inform future explorations of the mechanisms of intergenerational transmission of suicidal behavior.
Assuntos
Saúde Global/estatística & dados numéricos , Inquéritos Epidemiológicos/estatística & dados numéricos , Pais/psicologia , Psicopatologia/estatística & dados numéricos , Ideação Suicida , Tentativa de Suicídio/psicologia , Adolescente , Adulto , Transtornos de Ansiedade/epidemiologia , Transtornos de Ansiedade/psicologia , Saúde da Família , Humanos , Transtornos do Humor/epidemiologia , Transtornos do Humor/psicologia , Prevalência , Fatores de RiscoRESUMO
BACKGROUND: Although many studies suggest that, on average, depression-specific psychotherapy and antidepressant pharmacotherapy are efficacious, we know relatively little about which patients are more likely to respond to one versus the other. We sought to determine whether measures of spectrum psychopathology are useful in deciding which patients with unipolar depression should receive pharmacotherapy versus depression-specific psychotherapy. METHOD: A total of 318 adult out-patients with major depression were randomly assigned to escitalopram pharmacotherapy or interpersonal psychotherapy (IPT) at academic medical centers at Pittsburgh, Pennsylvania and Pisa, Italy. Our main focus was on predictors and moderators of time to remission on monotherapy at 12 weeks. RESULTS: Participants with higher scores on the need for medical reassurance factor of the Panic-Agoraphobic Spectrum Self-Report (PAS-SR) had more rapid remission with IPT and those with lower scores on the psychomotor activation factor of the Mood Spectrum Self-Report (MOODS-SR) experienced more rapid remission with selective serotonin reuptake inhibitor (SSRI) pharmacotherapy. Non-specific predictors of longer time to remission with monotherapy included several panic spectrum and mood spectrum factors and the Social Phobia Spectrum (SHY) total score. Higher baseline scores on the 17- and 25-item Hamilton Depression Rating Scales (HAMD-17 and HAMD-25) and the Work and Social Adjustment Scale (WSAS) also predicted a longer time to remission, whereas being married predicted a shorter time to remission. CONCLUSIONS: This exploratory study identified several non-specific predictors but few moderators of psychotherapy versus pharmacotherapy outcome. It offers useful indicators of the characteristics of patients that are generally difficult to treat, but only limited guidance as to who benefits from IPT versus SSRI pharmacotherapy.
Assuntos
Citalopram/uso terapêutico , Transtorno Depressivo Maior/terapia , Psicoterapia , Inibidores Seletivos de Recaptação de Serotonina/uso terapêutico , Adulto , Afeto , Ansiedade/psicologia , Transtorno Depressivo Maior/tratamento farmacológico , Transtorno Depressivo Maior/psicologia , Feminino , Humanos , Masculino , Valor Preditivo dos Testes , Modelos de Riscos Proporcionais , Escalas de Graduação Psiquiátrica , Testes Psicológicos , Indução de Remissão , Fatores de TempoRESUMO
BACKGROUND: To date, few randomized controlled trials (RCTs) of major depression have examined suicidal ideation as an outcome measure. Our aim is to determine the incidence of treatment-emergent suicidal ideation (ESI) and behaviors during the acute phase of treatment with an SSRI antidepressant or interpersonal psychotherapy (IPT) in patients with unipolar major depression. METHODS: In a two-site RCT, 291 adult outpatients with nonpsychotic major depression and a Hamilton Depression Rating Scale (HDRS) score ≥15 were randomly allocated to IPT or SSRI. Participants who did not remit with monotherapy received augmentation with the other treatment. ESI was defined as a post-baseline HDRS suicidality item score ≥2 or a post-baseline Quick Inventory of Depressive Symptomatology (QIDS) score ≥2 in patients with a baseline score ≤1. RESULTS: Of the 231 participants who had no suicidal ideation at baseline, 32 (13.8%) subsequently exhibited ESI on at least one post-baseline visit. Time to suicidal ideation was significantly longer in patients allocated to SSRI compared to those allocated to IPT (HR = 2.21, 95% CI 1.04-4.66, P = .038), even after controlling for treatment augmentation, benzodiazepine use, and comorbidity with anxiety disorders. Worsening of suicidal ideation occurred in 7/60 patients who had suicidal ideation at baseline. In the large majority of cases, suicidal ideation was successfully managed with the study protocol. CONCLUSIONS: In the context of careful monitoring and frequent contact, selective serotonin reuptake inhibitor (SSRI) was associated with a lower risk of ESI than IPT and both SSRI and IPT appeared to be safe treatments for patients with past suicide attempts, none of whom exhibited ESI during the study.
Assuntos
Citalopram/efeitos adversos , Citalopram/uso terapêutico , Transtorno Depressivo Maior/tratamento farmacológico , Psicoterapia , Inibidores Seletivos de Recaptação de Serotonina/efeitos adversos , Inibidores Seletivos de Recaptação de Serotonina/uso terapêutico , Ideação Suicida , Adulto , Transtornos de Ansiedade/diagnóstico , Transtornos de Ansiedade/tratamento farmacológico , Transtornos de Ansiedade/psicologia , Benzodiazepinas/efeitos adversos , Benzodiazepinas/uso terapêutico , Terapia Combinada , Comorbidade , Transtorno Depressivo Maior/diagnóstico , Transtorno Depressivo Maior/psicologia , Progressão da Doença , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Inventário de Personalidade/estatística & dados numéricos , PsicometriaRESUMO
BACKGROUND: The painful experience of mourning after suicide can be further complicated by the stigma surrounding suicide survival. We investigated how grief and depression influence the perception of stigma towards survivors in a sample of help-seeking persons bereaved through suicide. METHODS: Cross-sectional design. Information on sociodemographic variables and responses to the Stigma of Suicide Survivor Scale, Beck Depression Inventory (BDI) and Inventory of Complicated Grief (ICG) was collected from 240 people bereaved through suicide who consecutively accessed an online support initiative. RESULTS: Despite the strong correlation between ICG and BDI scores, the intensity of depressive but not of grief symptoms was related to perceived stigma towards survivors. Time since loss was also positively related to levels of perceived stigma against survivors. The links between depression and perceived stigma persisted after taking into account relationship with the deceased and other sociodemographic factors. LIMITATIONS: The main study limitations are the cross-sectional design, reliance on self-report measures, and the self-selection of the sample of people bereaved through suicide, seeking help through a website. Social support was not measured and the sample included a large proportion of women. CONCLUSIONS: Specific interventions designed for persons bereaved by suicide should consider that psychological distress and mourning are qualitatively different reactions to a suicide loss. The relationship among perceived stigma, depressive suffering and time elapsed since the suicide loss suggests the usefulness of closely investigating the experience of stigma in all people bereaved through suicide with depressive symptoms, even long after the event.
Assuntos
Depressão/psicologia , Pesar , Comportamento de Busca de Ajuda , Estigma Social , Suicídio/psicologia , Sobreviventes/psicologia , Adolescente , Adulto , Idoso , Estudos Transversais , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Percepção , Autorrelato , Apoio Social , Estresse Psicológico , Adulto JovemRESUMO
The presence and distribution of cells positive to orexin A (OXA) and to orexin type 2 receptor (OX2R) were investigated in the gastrointestinal tract of neonatal dogs by means of immunohistochemical techniques. The orexin A-positive cells were identified with some of the endocrine cells in the stomach and in the duodenum; they were both of the open and closed type and were lacking in the large intestine. In the stomach, a large subset of orexin A-positive cells also showed gastrin-like immunoreactivity while, in the duodenum, many of them seemed to store serotonin. The orexin type 2 receptor-positive cells were evidenced all along the gastrointestinal tract examined, also in the large intestine, and they showed the same morphological characteristics as those positive to orexin A. Moreover, the immunohistochemical techniques revealed intense positivity for both orexin A and orexin type 2 receptor in the neurons and fibers of the enteric nervous system. A large subset of orexin A-positive neurons seemed to store substance P.
Assuntos
Cães/fisiologia , Duodeno/metabolismo , Células Enteroendócrinas/metabolismo , Mucosa Gástrica/metabolismo , Peptídeos e Proteínas de Sinalização Intracelular/metabolismo , Neuropeptídeos/metabolismo , Receptores Acoplados a Proteínas G/metabolismo , Receptores de Neuropeptídeos/metabolismo , Animais , Animais Recém-Nascidos , Contagem de Células , Cães/anatomia & histologia , Duodeno/citologia , Células Enteroendócrinas/citologia , Feminino , Imuno-Histoquímica , Masculino , Receptores de Orexina , Orexinas , Estômago/citologiaRESUMO
REASONS FOR PERFORMING STUDY: Sialic acids modulate the metabolite transport across membranes and may be involved in protection against pathogenic agents. The presence of sialoderivatives in the equine mandibular gland requires further study. OBJECTIVE: To biochemically visualise in situ the presence of sialoderivatives, by means of mild and strong periodate oxidation and alcoholic saponification, combined with lectin histochemistry and sialidase digestion in order to hypothesise roles for detached sialoderivatives. METHODS: Mandibular glands were removed from 8 mature horses of both sexes and subjected to histochemical procedures, including periodate oxidation, saponfication and lectin staining. Controls were based upon the omission of peroxidase-conjugated lectins and respective enzyme-free buffers. RESULTS: The reactivities of PNA and RCA I lectins were affected by sialidase treatment, whether preceded by saponification or not, showing that the dimer N-acetyl-sialic acid-beta-Gal was linked (1-3)GalNAc and (1-4)GlcNAc. In acinar cells the sequence sialic acid-beta-Gal(1-3)GalNAc showed sialic residues acetylated at C4 only and at C4 and C7 and/or C8 and/or C9(alpha2-6Gal) in both sexes, while in female mandibular gland also C4 and C9(alpha2-3Gal) acetylated residues were present. Sialic acid linked to beta-Gal(1-4)GlcNAc was prevalently C4 and C7 and/or C8 and/or C9(alpha2-6Gal and alpha2-3Gal) acetylated, whereas only a minor quantity showed acetyl groups at C7 and/or C8 and/or C9(alpha2-6Gal) in the acinar cells of both sexes. CONCLUSIONS: The great variety of sialic acid residues expressed by equine mandibular gland could assume an important role in the defensive mechanisms towards pathogen agents and, compared with those of cattle, probably represents an example of molecular species-specificity related to different alimentary habits.
Assuntos
Cavalos/fisiologia , Lectinas , Ácido N-Acetilneuramínico , Glândulas Salivares/metabolismo , Glândula Submandibular/metabolismo , Animais , Feminino , Histocitoquímica , Cavalos/metabolismo , Lectinas/metabolismo , Masculino , Mandíbula , Ácido N-Acetilneuramínico/análogos & derivados , Ácido N-Acetilneuramínico/química , Ácido N-Acetilneuramínico/metabolismo , Neuraminidase/metabolismo , Glândulas Salivares/química , Glândulas Salivares/enzimologia , Especificidade da Espécie , Glândula Submandibular/química , Glândula Submandibular/enzimologiaRESUMO
In Italy, postvention models specifically designed for people surviving the suicide of a loved one are very scarce. The SOPRoxi project was developed to respond to this particular lack. By involving different professional and nonprofessional figures (GPs, mental health professionals, social workers, volunteers, etc), the SOPRoxi project aims to remove the stigma associated with this condition and to offer adequate, multifaceted help to survivors.
Assuntos
Intervenção em Crise/métodos , Projetos de Pesquisa , Tentativa de Suicídio/psicologia , Sobreviventes/psicologia , Humanos , Grupos de AutoajudaRESUMO
The neuropeptide oxytocin (OXT) has been proposed as a treatment for a number of neuropsychiatric disorders characterised by impaired social behaviour, including schizophrenia. Although several studies have reported the chronic administration of OXT to be safe and tolerable, its effects on circulating levels of OXT, as well as the related neuropeptide arginine vasopressin (AVP), have not been assessed. In the present study, in a within-subjects cross-over, double-blind, randomised controlled trial, we assayed the plasma levels of OXT and AVP in 31 patients with schizophrenia who were treated daily for 4 months with 40 IU of intranasal OXT or placebo. Our data indicate a mean ± SD baseline OXT concentration of 1.62 ± 0.68 pg/ml, as determined by radioimmunoassay, which did not display any significant variation after chronic treatment with OXT or placebo. Similarly, the mean ± SD baseline AVP value of 2.40 ± 1.26 pg/ml remained unchanged. The present study also assessed cardiovascular and body fluid indicators (osmolality, plasma sodium concentration and systolic blood pressure), as well as a parameter for food intake (body mass index), with all observed to remain stable. By reporting that daily treatment with 40 IU of intranasal OXT or placebo for 4 months does not impact on OXT and AVP plasma levels, nor on cardiovascular, body fluids and food intake parameters, the present study represents an important step towards developing OXT as a safe treatment.
Assuntos
Neurofisinas/sangue , Ocitocina/administração & dosagem , Ocitocina/sangue , Precursores de Proteínas/sangue , Esquizofrenia/sangue , Esquizofrenia/tratamento farmacológico , Vasopressinas/sangue , Administração Intranasal , Adolescente , Adulto , Pressão Sanguínea/efeitos dos fármacos , Estudos Cross-Over , Método Duplo-Cego , Ingestão de Alimentos/efeitos dos fármacos , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Neurofisinas/farmacocinética , Concentração Osmolar , Ocitocina/farmacocinética , Ocitocina/uso terapêutico , Precursores de Proteínas/farmacocinética , Sódio/sangue , Vasopressinas/farmacocinética , Adulto JovemRESUMO
Localization of individual glycosidic residues and sialic acid acceptor sugars was investigated by conjugated lectins in the rabbit oviduct under physiological hormonal conditions and human chorionic gonadotropin (HCG) administration. Ampulla and isthmus were found to exhibit lectin binding profiles typical of each hormonal stage. Two different sialylated glycomolecules were identified within the epithelial lining; in particular, sialoglycoconjugates characterized by the terminal sequence sialic acid-galactose were visualized in the secretory cells and the sialic acid-N-acetylgalactosamine terminal disaccharides were localized on both ciliated and secretory cells of the entire oviduct. Surface and cytoplasmic sialoglycoconjugates were also found to exhibit a differential behaviour inside the two oviduct tracts examined. Present findings further supported the idea that in ampulla and isthmus, the greatest modifications consequent to hormone treatment take place at different times.
Assuntos
Acetilgalactosamina/análise , Gonadotropina Coriônica/administração & dosagem , Tubas Uterinas/metabolismo , Galactose/análise , Lectinas/metabolismo , Ácidos Siálicos/análise , Sialoglicoproteínas/metabolismo , Animais , Epitélio/metabolismo , Feminino , Peroxidase do Rábano Silvestre , CoelhosRESUMO
The aim of this study was to assess any predictive factors for repeated attempted suicide and completed suicide in a 1-year follow-up on a sample of elderly European suicide attempters (60 years and over). From 1990 to 1993, 63 subjects completed the first interview and were recontacted after 1 year. At follow-up, eight subjects (12.7%) had taken their lives and seven (11.1%) had repeated at least one suicide attempt. On comparison of repeaters and non-repeaters, differences emerged in terms of death of the father in childhood and for mean Suicidal Intent Score. At the end of follow-up period, repeaters reported a more frequent desire to repeat suicidal behaviour and judged their mental health and social assistance received to be worse. Suicides and non-repeaters differed especially in relation to death of father during childhood and number of contacts with General Practitioner. Interpretation of the results must take into account the smallness of the test sample, the difficulties in obtaining complete data for the follow-up interview, the lack of a control group and a diagnosis formulated in a hospital consultation setting. The study confirms, however, the high risk of repetition of suicidal behaviour in the elderly. In old age suicidal ideation is often sustained over long periods of time and requests for help are addressed to relatives and GPs. An interesting finding is the more frequent death of the father during childhood among repeaters.
Assuntos
Envelhecimento/psicologia , Tentativa de Suicídio/etnologia , Tentativa de Suicídio/psicologia , Idoso , Idoso de 80 Anos ou mais , Europa (Continente)/etnologia , Feminino , Humanos , Acontecimentos que Mudam a Vida , Estudos Longitudinais , Masculino , Pessoa de Meia-Idade , Recidiva , Fatores de RiscoRESUMO
The aim of the study was to compare the management of suicide attempts by patients in Sweden and Italy with a view to providing a perspective on differences in treatment. Two consecutive samples of suicide attempters from Huddinge (n=97) and Padua (n=100) were studied in terms of sociodemographic characteristics, previous care, referral, medical and psychiatric care, hospitalization, aftercare, and short-term compliance. In Italian somatic management of acute suicidal crises, there are more physicians specializing in anesthesia or internal medicine working in ambulances and emergency wards, and there is a heavier emphasis on somatic care. Swedish management procedures seem to entail more medical examinations and biohumoral tests. Moreover, the procedures at the Swedish hospital give priority to early psychiatric intervention, and admission to psychiatric inpatient care is more frequent. However, it is not normal practice in emergency psychiatric care at either of the centers for specialists to serve in the immediate liaison consultation. There are differences in assessment and treatment between the two countries that may provide a perspective on their procedures, implying that current procedures for managing patients belonging to groups identified as "high-risk" in terms of suicide may be modified.
Assuntos
Serviços de Emergência Psiquiátrica/organização & administração , Serviços de Saúde Mental/organização & administração , Psiquiatria/organização & administração , Encaminhamento e Consulta/organização & administração , Tentativa de Suicídio/prevenção & controle , Adolescente , Adulto , Assistência ao Convalescente/organização & administração , Idoso , Idoso de 80 Anos ou mais , Feminino , Hospitalização/estatística & dados numéricos , Humanos , Itália , Masculino , Pessoa de Meia-Idade , Cooperação do Paciente/psicologia , Cooperação do Paciente/estatística & dados numéricos , Qualidade da Assistência à Saúde , Fatores Socioeconômicos , Tentativa de Suicídio/psicologia , Tentativa de Suicídio/estatística & dados numéricos , SuéciaRESUMO
Traditional non-lectin staining methods and lectin histochemistry combined with specific exoglycosidase digestion were used to investigate the histological structure of these glands and to visualize the occurrence and composition of salivary glycoconjugates. The quail lingual glands comprise the anterior lingual gland, with rostral and caudal portions that differ in morphology and histochemical staining, and the posterior lingual gland devoid of regional differences. Carbohydrate histochemistry further differentiated the secretory structures by revealing a heterogeneous cell population of tubules within the rostral and caudal portions of the anterior gland, and a rather homogeneous staining of the tubuloalveolar elements in the rostral portion of the anterior lingual gland and in the posterior gland. Tubuloalveolar secretory cells mainly produced sulphate-containing molecules. In addition, sialoglycoconjugates were present in both anterior and posterior lingual glands, whereas fucoglycoconjugates were visualized only in the anterior gland.
Assuntos
Coturnix/anatomia & histologia , Glicoconjugados/análise , Glândulas Salivares/anatomia & histologia , Glândulas Salivares/química , Acetilgalactosamina/análise , Animais , Fucose/análise , Glicoconjugados/química , Histocitoquímica , Lectinas , Masculino , Ácidos Siálicos/análise , Língua/anatomia & histologiaRESUMO
Lectin histochemistry combined with glycosidase digestion was used to investigate the presence of glucidic residues and identify the terminal residues and their acceptor sugars in these glands. Quantitative evaluation of lectin-positive sites was made by histophotometrical scanning. Lectin histochemistry demonstrated that the anteromedial portion contains disaccharides sialic acid-D-Gal, sialic acid-D-GalNAc and Fuc-D-Gal, and that the anterolateral portion contains the terminal dimer sialic acid-D-Gal only. These findings have hypothetical significance in terms of the known functions of chicken anterior lingual glands.
Assuntos
Carboidratos/química , Galinhas/metabolismo , Glicosídeo Hidrolases , Lectinas , Glândulas Salivares Menores/metabolismo , Língua/metabolismo , Acetilgalactosamina/química , Animais , Configuração de Carboidratos , Galinhas/anatomia & histologia , Feminino , Fucose/química , Galactose/química , Técnicas Imunoenzimáticas , Masculino , Manose/química , Glândulas Salivares Menores/citologia , Ácidos Siálicos/química , Coloração e Rotulagem , Língua/citologiaRESUMO
We investigated the occurrence of endogenous lectins in the mouse submandibular gland using anti-lectin antibodies that selectively bound the respective hapten lectins which have formed a complex with the appropriate hapten sugars and endogenous lectins. Findings supported the idea that endogenous lectins could interact with sugar residues and perform several roles including packaging, immobilization and transport of glucidic material. A functional meaning in the defence from some pathogenous agents was also postulated. Animal lectins seem to play roles related to their localization like occurs in the plants.
Assuntos
Lectinas/isolamento & purificação , Glândula Submandibular/química , Animais , Transporte Biológico , Metabolismo dos Carboidratos , Feminino , Imuno-Histoquímica , Lectinas/metabolismo , Masculino , Camundongos , Glândula Submandibular/anatomia & histologiaRESUMO
The chicken anterior lingual glands contain a large amount of sialoglycoconjugates. This study is aimed at discriminating between them, on the basis of the degree of acetylation and the acceptor sugars, by means of lectins combined with neuraminidase digestion and treatment with oxidizing and deacetylating agents. In the anteromedial part of lingual glands, only low concentrations of periodate-labile sialic acid having alpha 2-3,6-galactose and alpha 2-6-N-acetylgalactosamine acceptor sugars were present. Mostly, C7 and/or C8 acetylated sialic acids occurred, while C9 acetylated sialic acid linked alpha 2-3-galactose and alpha 2-6-N-acetylgalactosamine were restricted to some cells. In the anterolateral part, sialic acid linked alpha 2-6-N-acetylgalactosamine was not acetylated, while sialoderivatives alpha 2-3 linked to galactose were mainly C9 acetylated.
Assuntos
Lectinas/metabolismo , Freio Lingual/química , Glândulas Salivares Menores/química , Ácidos Siálicos/análise , Acetilação , Acetilgalactosamina/metabolismo , Animais , Sítios de Ligação , Galinhas , Feminino , Galactose/metabolismo , Imuno-Histoquímica , Freio Lingual/metabolismo , Masculino , Ácido N-Acetilneuramínico , Neuraminidase/metabolismo , Oxirredução , Ácido Periódico/química , Glândulas Salivares Menores/metabolismo , Ácidos Siálicos/metabolismoRESUMO
The existence and distribution of vasoactive intestinal polypeptide (VIP), and Met-enkephalin pentapeptide were investigated by means of the peroxidase-antiperoxidase (PAP) technique in rabbit submandibular and sublingual glands. In the submandibular gland, VIP immunostaining was observed in some peripheral acinar cells, while in sublingual one VIP positive fibres surrounded semilunes. Ductal cells of both glands were also reactive. These findings suggested a role of VIP in regulating volume and composition of salivary secretion.
Assuntos
Encefalina Metionina/análise , Glândula Sublingual/citologia , Glândula Submandibular/citologia , Peptídeo Intestinal Vasoativo/análise , Animais , Soros Imunes , Imuno-Histoquímica , CoelhosRESUMO
An immunohistochemical study was conducted in order to visualize an endogenous lectin, having specificity for alpha-L-fucose residues, in the ampullary and isthmic tracts of the rabbit oviduct. 2 different sequences (S1 and S2) were tested using antilectin UEA I antibody. Reactive sites towards S2 sequence were localized at ciliated cell level in the ampulla; in the isthmus, instead, the staining was present both in ciliated and secretory cells. A role in the sugar immobilization and gamete and zygote protection was postulated for the endogenous lectin evidenced.