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1.
Rev Med Liege ; 77(9): 538-543, 2022 Sep.
Artigo em Francês | MEDLINE | ID: mdl-36082602

RESUMO

Patients with insulin-treated type 1 diabetes (T1D) are exposed to hypoglycaemia, which may be serious. Serious cognitive impairment (including coma and seizure) that requires the help of a third party is a medical emergency. Besides the intravenous injection of glucose by a health care provider, its treatment consists of the subcutaneous or intramuscular injection of glucagon which may be performed by a family member. However, such an injection is not easy and puts off some people, which retards the initiation of a potentially life-saving therapy. The intranasal administration of 3 mg glucagon has been shown as efficacious as the subcutaneous or intramuscular injection of 1 mg glucagon in controlled studies carried out in both adult and youth patients with T1D. Stimulation and real-life studies among caregivers, patients and acquaintances showed a preference for nasal glucagon because of its easy and quick use. The launch of nasal glucagon (Baqsimi®) offers new perspectives for the ambulatory emergency management of severe hypoglycaemia and hypoglycaemic coma with a special obvious advantage in children.


La personne avec un diabète de type 1 (DT1) traité par insuline est exposée à un risque d'hypoglycémie, parfois grave. L'hypoglycémie sévère qui désigne tout trouble cognitif grave (y compris coma, convulsion) nécessitant l'intervention d'un tiers est une urgence médicale. Outre l'injection de glucose par voie intraveineuse, réservée à un personnel de santé, le traitement consiste en l'injection de glucagon par voie sous-cutanée ou intramusculaire qui peut être réalisée par un membre de l'entourage. Cependant, cette injection n'est pas aisée et rebute certaines personnes, ce qui retarde la mise en route d'un traitement potentiellement salvateur. L'administration nasale de glucagon 3 mg s'est avérée aussi performante que l'injection sous-cutanée ou intramusculaire de 1 mg dans des études contrôlées réalisées chez des patients DT1 adultes ou enfants/adolescents. Des études de simulation et de vraie vie réalisées auprès de soignants, de patients et de connaissances ont montré une préférence pour la forme nasale en raison de sa facilité et rapidité d'utilisation. La commercialisation du glucagon nasal (Baqsimi®) offre de nouvelles perspectives pour le traitement d'urgence ambulatoire de l'hypoglycémie sévère et du coma, avec un avantage particulièrement évident chez les enfants.


Assuntos
Diabetes Mellitus Tipo 1 , Hipoglicemia , Adolescente , Adulto , Glicemia , Criança , Coma/induzido quimicamente , Diabetes Mellitus Tipo 1/complicações , Diabetes Mellitus Tipo 1/tratamento farmacológico , Glucagon/efeitos adversos , Glucagon/uso terapêutico , Humanos , Hipoglicemia/induzido quimicamente , Hipoglicemiantes/efeitos adversos , Insulina
2.
Rev Med Liege ; 76(12): 884-889, 2021 12.
Artigo em Francês | MEDLINE | ID: mdl-34881833

RESUMO

The continuous and multidisciplinary care of children with type 1 diabetes contributes improving their quality of life. Nevertheless, psychological follow-up issues among parents of a diabetic child are less developed in studies. At present, there is a need to develop research on psychological parental adjustment in order to identify risk and protective factors for understanding the parental experience and improving the initiatives to prevent the parental distress. Our results argue for a crucial role of intolerance of uncertainty in parental concerns. This study supports the continuous psychological follow-up of parents in close collaboration with medical teams.


La prise en charge continue et pluridisciplinaire des enfants atteints de diabète de type 1 contribue à l'amélioration de leur qualité de vie. Cependant, les enjeux du suivi psychologique des parents d'un enfant diabétique sont moins développés dans les travaux de la littérature. À l'heure actuelle, il est nécessaire de réaliser des recherches portant sur l'ajustement psychologique parental afin d'identifier les facteurs de risque et de protection dans la compréhension du vécu des parents dans le but d'améliorer les initiatives de prévention de la détresse parentale. Nos résultats plaident pour un rôle non négligeable du facteur d'intolérance à l'incertitude au maintien des inquiétudes parentales. Cette étude confirme l'intérêt d'un suivi psychologique continu des parents en étroite collaboration avec les équipes médicales.


Assuntos
Diabetes Mellitus Tipo 1 , Adaptação Psicológica , Criança , Ajustamento Emocional , Humanos , Pais , Estudos Prospectivos , Qualidade de Vida , Estresse Psicológico
3.
Rev Med Liege ; 75(5-6): 406-409, 2020 May.
Artigo em Francês | MEDLINE | ID: mdl-32496688

RESUMO

These last few years, new advances in technologies and modern insulin regimens have improved diabetes care for children and adolescents and have led to the definition of new therapeutic goals.


Au cours de ces dernières années, les nouvelles avancées technologiques et thérapeutiques ont marqué la prise en charge du diabète de l'enfant et de l'adolescent amenant ainsi à définir de nouveaux objectifs thérapeutiques.


Assuntos
Diabetes Mellitus Tipo 1 , Hipoglicemiantes , Insulina , Adolescente , Criança , Diabetes Mellitus Tipo 1/tratamento farmacológico , Humanos , Hipoglicemiantes/uso terapêutico , Insulina/uso terapêutico
4.
Rev Med Liege ; 72(1): 37-42, 2017 Jan.
Artigo em Francês | MEDLINE | ID: mdl-28387076

RESUMO

Defining reference range is an essential tool for diagnostic. Age and sexe influences on thyroid hormone levels have been already discussed. In this study, we are defining a new pediatric reference range for TSH, FT3 and FT4 for Cobas C6000 analyzer. To do so, we have taken in account 0 to 18 year old outclinic patients. During the first year of life, thyroid hormone levels change dramatically before getting stabilized around 3 years old. We also compared our results to those obtained in a Canadian large-scale prospective study (the CALIPER initiative).


L'établissement de valeurs de référence thyroïdiennes pédiatriques est un élément essentiel dans l'aide au diagnostic des dysfonctionnements thyroïdiens chez l'enfant et l'adolescent. L'influence de l'âge et du sexe sur les concentrations des hormones thyroïdiennes a de nombreuses fois été évoquée. Dans cette étude, nous définissons un nouvel intervalle de référence pédiatrique pour la TSH, la FT3 et la FT4 sur l'analyseur Cobas C6000 (Roche). Pour ce faire, nous avons collecté les données des patients ambulants de 0 à 18 ans de notre institution. Au cours de la première année, les valeurs d'hormones thyroïdiennes fluctuent fortement avant de se stabiliser vers l'âge de 3 ans. Nous comparons également nos résultats à ceux d'une étude prospective de grande ampleur menée au Canada (étude CALIPER). e.


Assuntos
Hormônios Tireóideos/sangue , Adolescente , Criança , Pré-Escolar , Feminino , Humanos , Lactente , Recém-Nascido , Masculino , Valores de Referência , Estudos Retrospectivos
5.
Rev Med Liege ; 68(10): 531-6, 2013 Oct.
Artigo em Francês | MEDLINE | ID: mdl-24298728

RESUMO

Neonatal hyperthyroidism is a rare pathology, most often the consequence of Graves' disease in the mother. Around 0.2% of pregnant women have Graves disease and 1 to 2% of newborns of mother with Graves' disease. This article will describe the case of 4 newborns who have been diagnosed and treated in CHU-NDB between 2007 and 2011. The second part will focus on the new recommendations about the management of these young patients from foetal period to birth.


Assuntos
Doença de Graves/complicações , Hipertireoidismo/etiologia , Complicações na Gravidez/fisiopatologia , Feminino , Humanos , Hipertireoidismo/fisiopatologia , Hipertireoidismo/terapia , Recém-Nascido , Masculino , Gravidez , Complicações na Gravidez/epidemiologia
6.
Rev Med Liege ; 66(11): 581-8, 2011 Nov.
Artigo em Francês | MEDLINE | ID: mdl-22216731

RESUMO

The gynaecological issues encountered in children and teenagers lay at the intersection of paediatric endocrinology and gynaecology. More than ten years ago, an outpatient clinic in paediatric endocrinology and gynaecology has been created. Here, we review the last 6 years. 214 girls were included, considering only the first visit for each patient. Collected data are initial concern for this consultation, age at first consultation and confirmed or suspected diagnosis. A classification is done according to the initial concern of patients in six categories. Principal queries concern pubertal development, precocious pilosity or abnormalities in menstrual cycles. Vulvovaginitis and morphologic abnormalities are also frequently encountered. This consultation suggests a paediatric approach with a child feeling confident and a gynaecological examination with a specialist knowing the anatomy particularities and the development of the children. This article focuses on the importance of specific gynaecological examination in children and reviews the main diseases encountered.


Assuntos
Endocrinologia , Exame Ginecológico , Ginecologia , Pediatria , Encaminhamento e Consulta , Adolescente , Serviços de Saúde do Adolescente/organização & administração , Instituições de Assistência Ambulatorial/organização & administração , Bélgica/epidemiologia , Criança , Serviços de Saúde da Criança/organização & administração , Pré-Escolar , Doenças do Sistema Endócrino/diagnóstico , Feminino , Doenças dos Genitais Femininos/diagnóstico , Doenças dos Genitais Femininos/epidemiologia , Exame Ginecológico/métodos , Exame Ginecológico/normas , Exame Ginecológico/estatística & dados numéricos , Humanos , Lactente , Distúrbios Menstruais/diagnóstico , Distúrbios Menstruais/epidemiologia , Exame Físico/estatística & dados numéricos , Estudos Retrospectivos , Doenças Vaginais/diagnóstico , Doenças Vaginais/epidemiologia , Doenças da Vulva/diagnóstico , Doenças da Vulva/epidemiologia , Adulto Jovem
7.
Rev Med Liege ; 65(11): 634-41, 2010 Nov.
Artigo em Francês | MEDLINE | ID: mdl-21189530

RESUMO

Congenital Isolated hypogonadotropic hypogonadism (CIHH) is caused by an inherited mechanism of impairment of the pituitary-gonadal axis, interfering with gonads' control. Currently, different forms of HHCI with (Kallmann syndrome or KS) or without anosmia-hyposmia are known. There are six forms of KS already described but in several cases no genetic mutation is found. The genetic anomalies already described are: KAL1 (locus Xp23) coding for anosmine-1, KAL-2 or FGFRI (8p11. locus 2 - p11.1) coding for Fibroblast Growth Factor Receptor 1 (FGFR1), KAL4 or PROk2 (locus 3p21.1) and KAL3 or ProKR2 (locus 20p13) coding respectively for the Prokinecitin-2 and its receptor, KAL5 or CHD7 (locus_8q12.1) coding for a chromodomain helicase DNA-binding protein-7 gene (CHD7) and lastly KAL6 or FGF8 (10Q 24 loci) coding for Fibroblast Growth Factor 8. The other genetic anomalies without anosmia are less frequent. These are associated either with Gnrhl gene (8p2-11. 2), GnRHR (4q21.2), GPR54 (19p13),TAC3R or neurokinine receptor 3 (4 q 25), LH (19q13.32) or FSH (11p13). The isolated congenital hypogonadotrophic hypogonadism phenotype is variable depending on gender, the importance of the deficit, and ultimately, according to a specific regulatory mechanism of the axis, affected by an inherited genetic anomaly. In this review, we describe the essential aspects of the different phenotypes and genotypes of HHCI, in order to assess clinicians an early disease's diagnosis and management.


Assuntos
Hipogonadismo/congênito , Hipogonadismo/genética , Diagnóstico Diferencial , Aconselhamento Genético , Humanos , Hipogonadismo/diagnóstico , Hipogonadismo/terapia
8.
Horm Res ; 69(6): 334-42, 2008.
Artigo em Inglês | MEDLINE | ID: mdl-18504392

RESUMO

BACKGROUND/AIMS: Few data are available about parental concerns and psychosocial functioning of young children born small for gestational age (SGA) treated with growth hormone (GH). The present study focused on the perception of short stature and the concerns and expectations of the parents regarding GH treatment. METHODS: Forty prepubertal short SGA children, randomized into a GH-treated and a GH-untreated group, and their parents were evaluated by a questionnaire and a semi-structured interview at start and after 2 years of follow-up. RESULTS: Before start, 85% of the parents were concerned about short stature, 76% expected an increase in adult height of > or =10 cm and 81% expected a positive impact on well-being. Half of the parents expressed fears regarding GH treatment. After 2 years, more parents of treated children reported obvious growth and physical changes, and fewer parents reported teasing because of short stature. An improvement of well-being was reported by half of the parents of treated and untreated children. Fears about GH treatment disappeared almost completely. CONCLUSION: The perspective of GH treatment induced major adult height expectations. In treated children, the physical effects of GH treatment became obvious, teasing because of short stature decreased and initial concerns about short stature and GH therapy decreased.


Assuntos
Estatura , Hormônio do Crescimento Humano/uso terapêutico , Recém-Nascido Pequeno para a Idade Gestacional/crescimento & desenvolvimento , Percepção , Desempenho Psicomotor , Criança , Pré-Escolar , Feminino , Humanos , Recém-Nascido , Recém-Nascido Pequeno para a Idade Gestacional/psicologia , Masculino , Pais/psicologia , Satisfação do Paciente , Comportamento Social
9.
Int J Endocrinol ; 2018: 6421243, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-29849621

RESUMO

OBJECTIVES: Information on the efficacy of GH treatment in short SGA children starting their treatment in adolescence is limited. Therefore, adult height (AH), total height gain, and pubertal height gain were evaluated in short SGA children who started GH treatment at pubertal onset. PATIENT AND METHODS: Growth data of 47 short SGA adolescents (22 boys) who started GH treatment at pubertal onset (PUB group) were compared with results from 27 short SGA patients (11 boys) who started GH therapy at least 1 year before pubertal onset (PrePUB group). RESULTS: The PUB group achieved a mean (±SD) total height gain of 0.8 ± 0.7 SDS and an AH of -2.5 ± 0.7 SDS after 4.1 ± 1.1 years of GH treatment with a dosage of 41.8 ± 8.4 µg/kg/day. These results were comparable with those in the PrePUB group, which was treated for a longer duration (5.8 ± 2.1 years), resulting in a total height gain of 1.1 ± 0.7 SDS and an AH of -2.1 ± 1.0 SDS. Multiple regression analysis showed a significantly lower height gain in pubertal patients, females, and patients weighing less at start of GH treatment. An AH above -2 SDS and above the parent-specific lower limit of height was, respectively, reached in 28% and 70% of PUB and 44% and 67% of PrePUB patients (NS). AH SDS was positively correlated with the height SDS at start of GH. CONCLUSIONS: Short SGA adolescents starting GH therapy at an early pubertal stage have a modest and variable height gain. A normal AH can be expected in one third of the patients, especially in those with a smaller height deficit at onset of GH treatment.

10.
J Clin Invest ; 93(4): 1828-33, 1994 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-8163681

RESUMO

The regulation of ACTH receptor binding sites and mRNA by ACTH and angiotensin II (A-II) was studied using cultured human adrenal fasciculata reticularis cells (HAC). These cells expressed two major ACTH receptor transcripts of 1.8 and 3.4 kb and three minor ones of 4, 7, and 11 kb. ACTH increased the levels of all these transcripts in a time- and dose-dependent manner. At a maximal concentration of 10(-8) M, ACTH enhanced 21- and 4-fold the level of ACTH receptor mRNA and the number of receptors per cell, respectively. Pretreatment of HAC with A-II produced a dose-dependent enhancement of ACTH receptor mRNA that was associated with an increase of both ACTH receptor number and responsiveness to this hormone. The effects of A-II were completely blocked by an AT1 receptor subtype antagonist but not by an AT2 antagonist. The effects of ACTH together with A-II on ACTH receptor mRNA were greater than those induced by each hormone alone. These results show that ACTH receptor number and mRNA are positively regulated by the two main hormones (ACTH and A-II) which, in vivo, regulate adrenocortical functions. In addition, they also show that HAC are a target for A-II. Thus, regulation of ACTH receptors may be one mechanism by which ACTH and A-II regulate adrenocortical functions under both normal and pathological conditions.


Assuntos
Córtex Suprarrenal/efeitos dos fármacos , Hormônio Adrenocorticotrópico/farmacologia , Angiotensina II/farmacologia , RNA Mensageiro/análise , Receptores da Corticotropina/efeitos dos fármacos , Córtex Suprarrenal/química , Adulto , Sequência de Bases , Células Cultivadas , Humanos , Dados de Sequência Molecular , Receptores da Corticotropina/análise , Receptores da Corticotropina/genética
11.
J Clin Invest ; 95(4): 1429-39, 1995 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-7706446

RESUMO

We have studied the role of gap junction-mediated intercellular communication on the steroidogenic response of bovine (BAC) and human (HAC) adrenal fasciculo-reticularis cells in culture to corticotropin (ACTH). Indirect immunofluorescence analyses showed that intact human and bovine adreno-cortical tissue as well as HAC and BAC in culture expressed the gap junction protein connexin43 (also termed alpha 1 connexin). Both HAC and BAC were functionally coupled through gap junctions as demonstrated by microinjection of a low molecular mass fluorescent probe, Lucifer yellow. The cell-to-cell transfer of the probe was blocked by 18 alpha-glycyrrhetinic acid (GA), an inhibitor of gap junction-mediated intercellular communication. GA markedly decreased the steroidogenic response (cortisol production) of both HAC and BAC to low (10 pM) but not to high (5 nM) concentrations of ACTH. GA had no inhibitory effect on the steroidogenic response to 8 Br-cAMP (at either low or high concentrations) and did neither modify the binding of 125I-ACTH to its receptor nor the ACTH-induced cAMP production. BAC cultured at high or low cell densities (2.4 x 10(5) vs. 0.24 x 10(5) cells/cm2) exhibited distinct levels of intercellular communication and were differently responsive to sub-maximal ACTH concentrations. The ACTH ED50 values for cortisol production were 8.5 +/- 1.3 and 45 +/- 14 pM (P < 0.02) for BAC cultured at high and low density, respectively. In the presence of GA, there was a shift of the ACTH concentration-response curves in the two culture conditions. The ACTH ED50 of high density and low density cultured BAC increased 25- and 5-fold, respectively, and became similar (220 +/- 90 and 250 +/- 120 pM). These results demonstrate that gap junction-mediated communication between hormone-responsive and nonresponsive cells is one mechanism by which adrenal cells increase their responsiveness to low ACTH concentrations.


Assuntos
Córtex Suprarrenal/fisiologia , Hormônio Adrenocorticotrópico/fisiologia , Comunicação Celular/fisiologia , Junções Comunicantes/fisiologia , Córtex Suprarrenal/citologia , Córtex Suprarrenal/metabolismo , Hormônio Adrenocorticotrópico/farmacologia , Animais , Bovinos , Células Cultivadas , AMP Cíclico/biossíntese , Relação Dose-Resposta a Droga , Junções Comunicantes/efeitos dos fármacos , Ácido Glicirretínico/farmacologia , Humanos , Hidrocortisona/metabolismo , Vitamina A/farmacologia , Zona Fasciculada/citologia , Zona Fasciculada/fisiologia
12.
J Clin Invest ; 96(5): 2236-46, 1995 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-7593610

RESUMO

Glucocorticoid-suppressible hyperaldosteronism is a dominantly inherited form of hypertension believed to be caused by the presence of a hybrid CYP11B1/CYP11B2 gene which has arisen from an unequal crossing over between the two CYP11B genes in a previous meiosis. We have studied a French pedigree with seven affected individuals in which two affected individuals also have adrenal tumors and two others have micronodular adrenal hyperplasia. One of the adrenal tumors and the surrounding adrenal tissue has been removed, giving a rare opportunity to study the regulation and action of the hybrid gene causing the disease. The hybrid CYP11B gene was demonstrated to be expressed at higher levels than either CYP11B1 or CYP11B2 in the cortex of the adrenal by RT-PCR and Northern blot analysis. In situ hybridization showed that both CYP11B1 and the hybrid gene were expressed in all three zones of the cortex. In cell culture experiments hybrid gene expression was stimulated by ACTH leading to increased production of aldosterone and the hybrid steroids characteristic of glucocorticoid-suppressible hyperaldosteronism. The genetic basis of the adrenal pathologies in this family is not known but may be related to the duplication causing the hyperaldosteronism.


Assuntos
Neoplasias das Glândulas Suprarrenais/genética , Glândulas Suprarrenais/enzimologia , Sistema Enzimático do Citocromo P-450/genética , Glucocorticoides/metabolismo , Hiperaldosteronismo/genética , Esteroide 11-beta-Hidroxilase/genética , Neoplasias das Glândulas Suprarrenais/metabolismo , Glândulas Suprarrenais/patologia , Hormônio Adrenocorticotrópico/farmacologia , Angiotensina II/farmacologia , Sequência de Bases , Células Cultivadas , Citocromo P-450 CYP11B2 , Feminino , França , Regulação Enzimológica da Expressão Gênica , Humanos , Hiperaldosteronismo/metabolismo , Hibridização In Situ , Masculino , Dados de Sequência Molecular , Linhagem , Reação em Cadeia da Polimerase
13.
Eur J Endocrinol ; 156(2): 195-201, 2007 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-17287409

RESUMO

OBJECTIVE AND DESIGN: Children born small for gestational age (SGA) are not only at risk for short stature, but also for neurodevelopmental and behavioral problems. In this study, we analyzed the effects of high-dose GH therapy on cognitive development and psychosocial functioning in 34 prepubertal (3-8 years) short SGA children, equally randomized into a GH-treated group (TRG) and an untreated group (UTRG). METHODS: At start and after 2 years, children underwent standardized tests measuring the intellectual abilities (Wechsler Preschool and Primary Scale of Intelligence-Revised, or Wechsler Intelligence Scale for Children-Revised); their parents completed a standardized questionnaire evaluating psychosocial functioning (Child Behavior Checklist; CBCL). RESULTS: At start, total IQ scores were significantly (P < 0.05) lower in the SGA group than in the general population: 32% of the SGA patients had scores below 85. After 2 years, IQ scores remained unchanged in the TRG, but increased significantly (P < 0.05) in the UTRG. After exclusion of children with developmental problems, however, no significant changes in IQ scores occurred in the UTRG as well as the TRG. At baseline, 24% (8/34) children had problematic CBCL total problems scores, equally distributed among the two groups; no significant changes in the different subscale scores occurred after 2 years. CONCLUSION: No beneficial effect of 2 years of GH therapy on cognitive and behavioral profile could be observed in a cohort of rather young short SGA children presenting a variable degree of developmental delay and behavioral problems. Subsequent follow-up could reveal potential long-term effects of GH therapy on development and behavior.


Assuntos
Desenvolvimento Infantil/efeitos dos fármacos , Cognição/efeitos dos fármacos , Deficiências do Desenvolvimento/tratamento farmacológico , Hormônio do Crescimento Humano/administração & dosagem , Recém-Nascido Pequeno para a Idade Gestacional , Estatura , Criança , Comportamento Infantil , Pré-Escolar , Estudos de Coortes , Escolaridade , Feminino , Humanos , Recém-Nascido , Testes de Inteligência , Masculino , Psicologia
14.
J Neuroendocrinol ; 19(3): 181-8, 2007 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-17280591

RESUMO

The present study aimed to investigate the effects of leptin and ghrelin on pulsatile pulsatile gonadotrophin-releasing hormone (GnRH) secretion in vitro with emphasis on neuropeptide mediators and changes between prepuberty (15 days) and sexual maturity (50 days) in the male rat. When hypothalamic explants were studied 90 min after an intraperitoneal injection of leptin, ghrelin or agouti-related protein (AgRP) at 15 days, the GnRH interpulse interval (IPI) was significantly increased by ghrelin and AgRP and decreased by leptin. At 50 days, an increase in GnRH IPI was also caused by ghrelin and AgRP. When the peptides were directly incubated with the explants, the effects of leptin and AgRP in vitro were consistent with those seen after in vivo administration. By contrast, ghrelin resulted in a reduction of GnRH IPI and this was observed at 15 days only. To delineate the neuropeptide mediators of leptin and the effects of ghrelin in the hypothalamus, various hypothalamic neuropeptides and antagonists were used in vitro. At 15 days, the GnRH IPI was significantly decreased after incubation with cocaine and amphetamine-regulated transcript (CART), alpha-melanocyte-stimulating hormone, corticotrophin-releasing factor (CRF) and neuropeptide Y (NPY). The reduction of GnRH IPI caused by leptin was partially prevented by either an anti-CART antiserum or SHU 9119, a melanocortin MC3/MC4 receptor antagonist or a CRF receptor antagonist. The NPY-Y5 receptor antagonist did not influence the effects of leptin whereas that antagonist totally prevented the decrease in GnRH IPI caused by ghrelin. The ghrelin-induced reduction of GnRH IPI was partially prevented by SHU 9119. When used alone, SHU 9119 or a CRF-receptor antagonist resulted in increased GnRH IPI at 50 days while they had no effects at 15 days. The NPY-Y5 receptor antagonist resulted in increased GnRH IPI at 15 and 50 days. In conclusion, leptin and ghrelin show opposing effects on pulsatile GnRH secretion after administration in vivo whereas they both have stimulatory effects in vitro. Such effects involve consistently the anorectic peptides CART and CRF for leptin that are mainly active at 15 days. The melanocortigenic system appears to mediate the effects of both leptin and ghrelin. The effects of ghrelin also involve NPY receptors and operate effectively before and at sexual maturity.


Assuntos
Hormônio Liberador de Gonadotropina/metabolismo , Hipotálamo/metabolismo , Leptina/fisiologia , Hormônios Peptídicos/fisiologia , Maturidade Sexual/fisiologia , Proteína Relacionada com Agouti , Análise de Variância , Animais , Hormônio Liberador da Corticotropina/metabolismo , Feminino , Grelina , Técnicas In Vitro , Peptídeos e Proteínas de Sinalização Intercelular/fisiologia , Masculino , Proteínas do Tecido Nervoso/metabolismo , Periodicidade , Ratos , Ratos Wistar , Receptores de Melanocortina/fisiologia , Transdução de Sinais/fisiologia , Estatísticas não Paramétricas
16.
Rev Med Liege ; 61(7-8): 593-9, 2006.
Artigo em Francês | MEDLINE | ID: mdl-17020234

RESUMO

Prader Willi syndrome can be viewed as a physiopathological model of obesity. Such patients deserve specific management, preferably in a multidisciplinary setting. The paper reports on 6 patients followed in the paediatric endocrine service at the University of Liege.


Assuntos
Equipe de Assistência ao Paciente , Síndrome de Prader-Willi/terapia , Criança , Humanos , Síndrome de Prader-Willi/diagnóstico , Síndrome de Prader-Willi/genética
17.
Endocrinology ; 146(5): 2313-23, 2005 May.
Artigo em Inglês | MEDLINE | ID: mdl-15661860

RESUMO

Although the interactions between sex steroids and GnRH have been extensively studied, little is known about the mechanism of estradiol (E2) effects on GnRH secretion. In the present study, we used retrochiasmatic hypothalamic explants of 50-d-old male rats, and we observed that E2 significantly increased the glutamate-evoked GnRH secretion in vitro within 15 min in a dose-dependent manner. E2 also significantly increased the L-arginine-evoked GnRH secretion. E2 effects were time dependent because the initially ineffective 10(-9) M concentration became effective after 5 h of incubation. The E2 effects involved the estrogen receptor (ER) alpha because they were similarly obtained with the specific ER alpha agonist 1,3,5-tris(4-hydroxyphenyl)-4-propyl-1H-pyrazole. The use of glutamate receptor agonists and antagonists indicated that E2 effects on GnRH secretion evoked by both glutamate and L-arginine involved the 2-amino-3-hydroxy-5-methyl-4-isoxazol propionic acid/kainate receptors. Similar E2 effects on the kainate-evoked secretion were observed throughout development in both sexes. The observation of similar E2 effects using explants containing the median eminence alone indicated that the median eminence was a direct target for E2 rapid effects on the glutamate-evoked GnRH secretion. The signaling pathways involved in E2 effects included an increase in intracellular calcium and the activation of protein kinase A, protein kinase C, and MAPK. It is concluded that E2 can stimulate the glutamate- and nitric oxide-evoked GnRH secretion in vitro through a rapid pathway involving the ER and kainate receptor as well as through a slower mechanism responding to lower E2 concentrations.


Assuntos
Estradiol/farmacologia , Hormônio Liberador de Gonadotropina/metabolismo , Hipotálamo/metabolismo , Receptores de Estrogênio/fisiologia , Receptores de Ácido Caínico/fisiologia , Transdução de Sinais/fisiologia , Envelhecimento , Animais , Arginina/farmacologia , Receptor alfa de Estrogênio/agonistas , Receptor alfa de Estrogênio/fisiologia , Feminino , Ácido Glutâmico/farmacologia , Hipotálamo/efeitos dos fármacos , Cinética , Masculino , Eminência Mediana/efeitos dos fármacos , Eminência Mediana/metabolismo , Óxido Nítrico/farmacologia , Área Pré-Óptica/efeitos dos fármacos , Área Pré-Óptica/metabolismo , Ratos , Ratos Wistar , Receptores de Glutamato/efeitos dos fármacos , Receptores de Glutamato/fisiologia , Receptores de Ácido Caínico/efeitos dos fármacos
18.
Diabetes Care ; 22(11): 1845-50, 1999 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-10546018

RESUMO

OBJECTIVE: Adults with type 1 diabetes may have abnormal alterations in heart rate variability (HRV) due to cardiac autonomic neuropathy. This prospective study was performed to determine whether HRV can be used to detect subclinical autonomic neuropathy in diabetic children. RESEARCH DESIGN AND METHODS: We examined five time domain and three frequency domain HRV indices determined from 24-h Holter recordings in 73 diabetic children and adolescents aged 3-18 years (mean 12.1 years) with a mean duration of diabetes of 55 months. The measures were compared with normal ranges. Z scores were established for each parameter and were compared with classic risk factors of other diabetic complications. RESULTS: Most HRV indices were significantly depressed in children aged > or = 11 years, and the levels of HRV abnormalities were significantly correlated with long-term metabolic control (mean GHb for 4 years) in that age-group. In younger patients, HRV indices were within the normal range and were not correlated with the level of metabolic control. Illness duration and microalbuminuria but not short-term metabolic control (most recent GHb) were also independently predictive of HRV abnormalities. CONCLUSIONS: These results suggest that early puberty is a critical period for the development of diabetic cardiac autonomic dysfunction. Therefore, all type 1 diabetic patients should be screened for this complication by HRV analysis beginning at the first stage of puberty regardless of illness duration, microalbuminuria, and level of metabolic control.


Assuntos
Doenças do Sistema Nervoso Autônomo/fisiopatologia , Diabetes Mellitus Tipo 1/fisiopatologia , Neuropatias Diabéticas/fisiopatologia , Frequência Cardíaca/fisiologia , Coração/inervação , Adolescente , Doenças do Sistema Nervoso Autônomo/epidemiologia , Bélgica/epidemiologia , Criança , Pré-Escolar , Diabetes Mellitus Tipo 1/complicações , Neuropatias Diabéticas/epidemiologia , Eletrocardiografia Ambulatorial , Humanos , Modelos Lineares , Prevalência , Fatores de Risco
19.
Rev Med Liege ; 60(5-6): 320-1, 2005.
Artigo em Francês | MEDLINE | ID: mdl-16035287

RESUMO

The management of adolescents with diabetes mellitus involves specific aspects at diagnosis and during follow-up. A type 2 diabetes should be excluded at diagnosis since this condition is increasingly observed in closed relationhip with the progression of obesity in young people. During initial education process, the parents should be involved while a specific space and time for interaction with the adolescents is required. During follow-up, all aspects of the adolescent process should be taken into account together with diabetes. This includes risk-taking or exploratory behaviours, feeling of being different, angryness and difficulties for the adolescents to consider the long-term complication risk. Special attention should be devoted to the transition towards adult care.


Assuntos
Comportamento do Adolescente , Diabetes Mellitus Tipo 2/complicações , Diabetes Mellitus Tipo 2/terapia , Assunção de Riscos , Adolescente , Serviços de Saúde do Adolescente , Ira , Humanos , Obesidade/etiologia , Obesidade/prevenção & controle , Autoimagem
20.
Rev Med Liege ; 60(5-6): 313-9, 2005.
Artigo em Francês | MEDLINE | ID: mdl-16041859

RESUMO

The management and follow up of diabetes in youth is a multidisciplinary challenge due to both short and long term objectives. Awareness of the feelings and problems faced by the families is critical. The experience of our team has started in the 1960s and is briefly described and updated in this article.


Assuntos
Proteção da Criança , Diabetes Mellitus/terapia , Educação de Pacientes como Assunto , Criança , Pré-Escolar , Diabetes Mellitus/diagnóstico , Diagnóstico Diferencial , Humanos , Estado Nutricional , Equipe de Assistência ao Paciente , Pediatria , Apoio Social
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