RESUMO
OBJECTIVE: To identify risk factors for a woman to experience pregnancy denial. DESIGN, SETTING AND POPULATION: A French multicentric prospective case-control study with 71 mother-infant dyads having experienced a pregnancy denial versus a control group of 71 dyads. METHODS: Data were collected in the week after delivery using an observational leaflet and two psychiatric scales (MINI and QSSP). MAIN OUTCOME MEASURES: Statistically significant differences between the two groups regarding social, demographic, medical and psychiatric data. RESULTS: Not being in a stable relationship (odds ratio [OR] 17.18, 95% CI 3.37-87.60]; P < 0.0001), not having a high school diploma (OR 1.11, 95% CI 1.04-1.38]; P < 0.0001) and having a psychiatric history (OR 6.33, 95% CI 1.62-24.76; P = 0.0002) were risk factors to experience pregnancy denial, whereas being older was a protective factor (OR 0.86, 95% CI 0.79-0.93; P = 0.0054) (logistic regression, Wald 95% CI). Other risk factors included late declarations of pregnancy history and past pregnancy denials (case n = 7, 9.7% versus 0% in controls; P = 0.01), past pregnancy denials in the family (case n = 13, 18% versus control n = 4, 5.6%; P = 0.03), and use of a contraceptive method (75% for cases versus 7% in control; P < 0.0001), primarily an oral contraceptive (75%). CONCLUSION: Family or personal history of pregnancy denial should be part of the systematic anamnesis during the first visit of a patient of child-bearing age. Further, our study points out that life context (young age, single status, socio-economic precarity, pill-based contraception) could be a trigger for pregnancy denial in certain women. TWEETABLE ABSTRACT: Life context can be a trigger for pregnancy denial.
Assuntos
Negação em Psicologia , Gravidez não Planejada/psicologia , Adulto , Estudos de Casos e Controles , Anticoncepção/psicologia , Anticoncepção/estatística & dados numéricos , Escolaridade , Feminino , França , Humanos , Modelos Logísticos , Idade Materna , Razão de Chances , Gravidez , Estudos Prospectivos , Fatores de Risco , Adulto JovemRESUMO
BACKGROUND: Difficulty of use of eyedrops is a factor associated with poor patient compliance that reduces treatment efficacy. The aim of this study was to evaluate the handiness and global acceptability of the new Abak timolol bottle (multidose preservative-free eyedrops) in comparison with that of other administration systems (classical multidose eyedrops or single-doses) in patients treated for glaucoma or ocular hypertension. METHODS: Cross-sectional, retrospective and multicentre study involving 41 ophthalmologists in France. Selected patients were those who had been treated with the new Abak bottle since at least two months, as a replacement for other beta-blocker eyedrops. Handiness and acceptability of the new Abak bottle in comparison with other delivery systems were evaluated using a questionnaire filled by the investigator. RESULTS: Almost all the patients were unanimous regarding the handiness of the new Abak bottle: easy to open for 96.5% of them, easy to handle for 96.0%, and easy to get drops for 91.1%. For all these criteria and in a general manner, patients preferred the new Abak bottle in comparison with the previous eyedrop container. These results were confirmed in the oldest patients. CONCLUSION: The new Abak bottle had a greater acceptability compared to preserved multidose eyedrops or to single-doses. Its handiness and the absence of preservative which may improve local tolerance are in favor of a greater compliance in chronically treated patients.
Assuntos
Embalagem de Medicamentos , Soluções Oftálmicas/administração & dosagem , Antagonistas Adrenérgicos beta/administração & dosagem , Adulto , Idoso , Idoso de 80 Anos ou mais , Estudos Transversais , Feminino , França , Glaucoma/tratamento farmacológico , Humanos , Masculino , Pessoa de Meia-Idade , Hipertensão Ocular/tratamento farmacológico , Soluções Oftálmicas/química , Aceitação pelo Paciente de Cuidados de Saúde , Cooperação do Paciente , Estudos Retrospectivos , Adulto JovemRESUMO
INTRODUCTION: We describe the case of a young woman affected by a benign ovarian teratoma with paraneoplastic encephalitis. Several cases have already been reported, but it is the first article that focuses on details of the psychiatric symptoms of this disorder. BACKGROUND: Paraneoplastic encephalitis usually begins with a prodromal phase, followed first by prominent psychiatric symptoms or, less frequently, short-term memory loss, seizure, catatonia-like symptoms, dyskynesias and, secondly, by autonomic instability and central hypoventilation requiring intensive care. In our case and to our knowledge, for the first time in the literature, the patient was hospitalized in a psychiatric unit for a suspected manic episode with psychotic features, in association with short-term memory impairment and anxiety. It has been shown that patients suffering from paraneoplastic encephalitis associated with ovarian teratoma display antibodies for anti-N-methyl-D-aspartate (NMDA) receptors in CSF or plasma (more specifically for the NR1 subunit of the NRl/NR2 heteromers required to form a functional NMDA receptor). The NR1/NR2B heteromers are preferentially expressed in the adult hippocampus/forebrain, which are brain regions involved in the pathogenesis of various psychiatric, psychotic in particular, symptoms. Furthermore, the glutamatergic NMDA receptors are the major mediator of excitotoxicity and their dysfunction had been associated with neurologic disorders, but also with schizophrenia and, more recently, with mood disorders. CASE REPORT: This case supports the idea that the dysfunction of NMDA receptors may play a major role in psychiatric disorders, especially in psychosis and affective disorders. This article will briefly summarize the different evidences and hypotheses reported in the literature on NMDA receptors implication and will report how these receptors may serve as therapeutic targets.
Assuntos
Autoanticorpos/líquido cefalorraquidiano , Neoplasias Ovarianas/psicologia , Síndromes Paraneoplásicas do Sistema Nervoso/diagnóstico , Síndromes Paraneoplásicas do Sistema Nervoso/psicologia , Receptores de N-Metil-D-Aspartato/imunologia , Teratoma/diagnóstico , Teratoma/psicologia , Transtorno Bipolar/diagnóstico , Transtorno Bipolar/imunologia , Transtorno Bipolar/psicologia , Encéfalo/patologia , Erros de Diagnóstico , Feminino , Humanos , Imageamento por Ressonância Magnética , Exame Neurológico , Neoplasias Ovarianas/diagnóstico , Neoplasias Ovarianas/imunologia , Síndromes Paraneoplásicas do Sistema Nervoso/imunologia , Equipe de Assistência ao Paciente , Teratoma/imunologia , Tomografia Computadorizada por Raios X , Adulto JovemRESUMO
Insulin-like growth factor-II (IGF-II) is an important regulator of embryonic growth and differentiation, but its function in postnatal life is unclear. To address this point, we generated transgenic mice harboring fusion genes in which a human IGF-II complementary DNA is placed under the transcriptional control of the rat phosphoenolpyruvate carboxykinase promoter. Transgene-specific messenger RNA was detected in liver, kidney, and several parts of the gut. Serum IGF-II levels in transgenic mice were 2-3 times higher than those in controls and increased after starvation. Circulating IGF-I correlated negatively and IGF-binding protein-2 (IGFBP-2) positively with IGF-II levels, suggesting that IGF-I is displaced from IGFBPs by IGF-II and that IGF-II is a major regulator of IGFBP-2. Serum levels of IGFBP-3 and IGFBP-4 tended to be higher in phosphoenolpyruvate carboxykinase-IGF-II transgenic mice than in controls, as evaluated by ligand blot analysis. Starvation reduced serum IGF-I, but increased IGFBP-2 in transgenic mice more markedly than in controls. Fasting insulin levels were significantly reduced in transgenic mice, whereas glucose levels were not influenced by elevated IGF-II. The body growth of 4- and 12-week-old mice was not significantly influenced by elevated IGF-II, but transgenic mice displayed increased kidney and testis weight at the age of 4 weeks, and increased adrenal weight at the age of 12 weeks. Our results demonstrate that elevated IGF-II in postnatal life has multiple endocrine consequences and subtle time-specific effects on organ growth.
Assuntos
Fator de Crescimento Insulin-Like II/fisiologia , Camundongos Transgênicos/crescimento & desenvolvimento , Animais , Glicemia/análise , Proteínas de Transporte/sangue , DNA Complementar/análise , DNA Complementar/genética , Jejum/fisiologia , Regulação da Expressão Gênica , Regulação Enzimológica da Expressão Gênica , Crescimento/fisiologia , Insulina/sangue , Proteína 2 de Ligação a Fator de Crescimento Semelhante à Insulina , Proteína 4 de Ligação a Fator de Crescimento Semelhante à Insulina , Proteínas de Ligação a Fator de Crescimento Semelhante a Insulina , Fator de Crescimento Insulin-Like I/análise , Fator de Crescimento Insulin-Like II/análise , Fator de Crescimento Insulin-Like II/genética , Camundongos , Dados de Sequência Molecular , Fosfoenolpiruvato Carboxiquinase (GTP)/sangue , Fosfoenolpiruvato Carboxiquinase (GTP)/genética , Fosfoenolpiruvato Carboxiquinase (GTP)/fisiologia , RNA Mensageiro/análise , RNA Mensageiro/genética , RadioimunoensaioRESUMO
Insulin-like growth factor (IGF)-binding protein-2 (IGFBP-2) has been shown to inhibit IGF-dependent cell proliferation in a number of in vitro studies. However, no in vivo model of IGFBP-2 overexpression has been established so far. Therefore, we have generated transgenic mice, in which expression of a mouse IGFBP-2 complementary DNA is controlled by the cytomegalovirus (CMV) promoter. In two independent transgenic strains, transgene expression was highest in pancreas and stomach, followed by skeletal muscle, heart, colon, spleen, adipose tissue, brain, and kidney. Within the pancreas, IGFBP-2 expression was found in the islets but not in the exocrine part. Serum IGFBP-2 levels of CMV-IGFBP-2 transgenic mice were about 3-fold (P < 0.05) increased, compared with controls, whereas serum levels of IGF-I and IGF-II were unaffected by IGFBP-2 overexpression. Fasted serum glucose and fasted insulin levels were slightly reduced in transgenic mice, compared with controls. Postprandial serum glucose insulin levels were not affected by the genotype. At days later than 23, body weights of transgenic mice were significantly (P < 0.05) reduced in both sexes, compared with nontransgenic littermates. This reduction in body weight was mainly attributable to significantly (P < 0.05) lower carcass weights of CMV-IGFBP-2 transgenic vs. control mice. In contrast, absolute organ weights were not (or only as a tendency) reduced, except for the weight of the spleen, which was significantly (P < 0.05) lower in male transgenic than in control mice. Our data suggest that IGFBP-2 represents a negative regulator of postnatal growth in mice, potentially by reducing the bioavailability of IGF-I.
Assuntos
Expressão Gênica , Proteína 2 de Ligação a Fator de Crescimento Semelhante à Insulina/genética , Aumento de Peso , Animais , Glicemia/metabolismo , Northern Blotting , Citomegalovirus/genética , DNA Complementar/genética , Jejum , Feminino , Mucosa Gástrica/metabolismo , Imuno-Histoquímica , Insulina/sangue , Masculino , Camundongos , Camundongos Transgênicos , Especificidade de Órgãos , Pâncreas/metabolismo , Regiões Promotoras Genéticas , RNA Mensageiro/análise , Somatomedinas/metabolismoRESUMO
A 5-year-old boy with severe aplastic anemia failed to respond to cyclosporine (CYA), prednisolone and antilymphocyte globulin (ALG). No suitable sibling marrow donor was available, but an HLA-matched unrelated donor was identified. The patient was conditioned with cyclophosphamide (CY), 50 mg/kg/day for 4 days, total nodal irradiation (8 Gy), and ALG 30 mg/kg/day for 3 days. GVHD prophylaxis consisted of daily CYA, methotrexate (MTX) and ALG. The patient failed to achieve sustained engraftment. He was reconditioned with high-dose prednisolone and anti-T lymphocyte monoclonal antibody OKT3. The boy was reinfused with the same donor marrow on day 0 (+49/first BMT). No GVHD prophylaxis was given the second time. He received G-CSF on days 0 to +20 after the second transplant. Full engraftment was achieved on day +16 (+65). However, on day +31 (80) he developed a biopsy-proven B cell lymphoproliferative disorder (BLPD). After the OKT3 administration was stopped and treatment with ganciclovir and high-dose immunoglobulin was initiated, the BLPD resolved and the patient was discharged on day +50 (99). He is currently well with a functioning graft 266 (305) days posttransplant, with no sign of GVHD.
Assuntos
Anemia Aplástica/terapia , Transplante de Medula Óssea/efeitos adversos , Rejeição de Enxerto/prevenção & controle , Imunossupressores/uso terapêutico , Transtornos Linfoproliferativos/terapia , Muromonab-CD3/uso terapêutico , Transplante de Medula Óssea/imunologia , Pré-Escolar , Teste de Histocompatibilidade , Humanos , Imunoglobulinas Intravenosas/uso terapêutico , Transtornos Linfoproliferativos/etiologia , MasculinoRESUMO
Mice investigated in this study were generated by selecting a sub-population of the NMRI out-bred stock (C), for high (H) or low (L) 8-week body weight. After 58 generations of selection, 8-week body weights of the sub-populations were markedly different if compared to controls. To investigate endocrine changes causing the altered growth performance in the different lines of mice, we analysed several components of the growth hormone (GH)/insulin-like growth factor (IGF) system. Pituitary weights of male and female L mice were significantly smaller than those of C and H mice. Relative to body weight, pituitary weights of male mice from the three lines did not differ, however pituitary weight-to-body weight-ratios of female L mice were significantly greater than those of H females. Mean volume densities of somatotropic cells were significantly smaller in L mice than in C and H mice. Serum IGF-I concentrations were significantly lower in the L line than in the C and H lines. H mice displayed significantly increased serum insulin levels both after ad libitum feeding and after a 14 hour fasting period. Ligand blot analysis of serum IGF-binding proteins (IGFBPs) revealed a significant reduction of circulating IGFBP-3 in L mice as compared to C and H mice. In contrast, serum IGFBP-2 mRNA levels were significantly increased in male L mice and showed non significant increases in female L mice. Hepatic IGFBP-2 mRNA levels were significantly increased in L mice and decreased in H mice as compared to C mice. Expression of IGFBP-4 mRNA in the liver was significantly decreased in both selection lines (L, H) as compared to the random-bred controls. Our findings demonstrate that altered growth of mice resulting from selection for body weight is associated with complex changes in the endocrine network of the GH/IGF system.
Assuntos
Peso Corporal , Hormônio do Crescimento/metabolismo , Fator de Crescimento Insulin-Like I/metabolismo , Camundongos/crescimento & desenvolvimento , Tecido Adiposo/crescimento & desenvolvimento , Tecido Adiposo/metabolismo , Animais , Feminino , Regulação da Expressão Gênica , Imuno-Histoquímica , Insulina/sangue , Proteínas de Ligação a Fator de Crescimento Semelhante a Insulina/sangue , Proteínas de Ligação a Fator de Crescimento Semelhante a Insulina/genética , Fígado/metabolismo , Masculino , Camundongos/metabolismo , Tamanho do Órgão , Hipófise/citologia , Hipófise/crescimento & desenvolvimento , Hipófise/metabolismo , RNA Mensageiro/metabolismo , Caracteres SexuaisRESUMO
This study was conducted to investigate the relationships between results of computer-assisted semen analysis (spermatozoal motility and sperm head morphometry) and fertility of boars. In addition, concentrations of insulin-like growth factor (IGF)-I and IGF-II in seminal plasma were determined. The nonreturn rate (NRR) and the number of live-born piglets were compatible with the requirements of artificial insemination for all boars included in this study. Semen samples of 12 boars (Pietrain; 3 ejaculates each) were evaluated for spermatozoal motility and sperm head dimensions using computer-assisted methods. Native semen samples were centrifuged, and seminal plasma was frozen at -20 degrees C until assayed for IGF-I and IGF-II by specific radioimmunoassays. Spermatozoa of boars with a higher NRR (>86%) had a significantly slower average velocity of motile spermatozoa when compared with that of boars with an NRR below 86%. High-fertility boars (NRR > 86%) had significantly smaller sperm heads than did boars with an NRR below 86%, and their sperm heads were less elongated. Substantial concentrations of IGF-I (8.4-22.2 ng/mL) and IGF-II (12.1-19.8 ng/mL) could be measured in porcine seminal plasma; however, there was no correlation between IGF levels and semen parameters or individual fertility.
Assuntos
Fator de Crescimento Insulin-Like II/análise , Fator de Crescimento Insulin-Like I/análise , Sêmen/química , Sêmen/citologia , Cabeça do Espermatozoide , Motilidade dos Espermatozoides , Animais , Fertilidade , Inseminação Artificial , Masculino , SuínosRESUMO
Insulin-like growth factor-I (IGF-I) is an important factor for germ cell development and maturation of spermatozoa. Actions of IGFs are modulated by IGF-binding proteins (IGFBPs) that may, depending on their concentration and site of expression, inhibit or enhance effects of IGF-I. We characterized IGFs and IGFBPs in seminal plasma from bulls routinely used for artificial insemination (AI) and from bulls producing poor-quality semen (low mass and individual motility of spermatozoa). IGFs were measured by specific radioimmunoassay in 22 samples of seminal plasma from nine different AI bulls with high (> 76.8%), average (72.8-73.4%), or low (< 69.5%) nonreturn rate (NRR). IGF-I and IGF-II levels were 144 +/- 9 ng/ml (mean +/- SE; range, 79-238 ng/ml) and 144 +/- 10 ng/ml (range, 55-221 ng/ml), respectively, and did not correlate with NRRs. IGF-I concentrations in seminal plasma from bulls producing poor-quality semen (n = 10) were significantly (P < 0.05) greater (194 +/- 26 ng/ml; range, 94-370 ng/ml), whereas IGF-II levels were significantly (P < 0.05) lower (93 +/- 17 ng/ml; range, 38-183 ng/ml) than in AI bulls. Ligand blot analysis of seminal plasma for IGFBPs revealed the presence of a 38-/45-kDa doublet band and a 30-kDa IGFBP. These IGFBPs were identified as IGFBP-3 and IGFBP-5, respectively, by immunoprecipitation using specific antibodies. In addition, a low amount of IGFBP-4 was detected in bovine seminal plasma by immunoprecipitation. There was a marked difference in the activity of IGFBPs between individual bulls, with a relatively small within-bull variance. The differences in IGFBP activities did not correlate with the fertilization capacity of the bulls in vivo or in vitro nor with immunoreactive IGF-I and IGF-II levels in seminal plasma. Our results demonstrate the presence of IGFBPs in bovine seminal plasma. In contrast to human seminal plasma, high activity of IGFBP-3 was detected in seminal plasma of some bulls, suggesting species-specific regulation of IGFBP activity by proteases.
Assuntos
Proteínas de Ligação a Fator de Crescimento Semelhante a Insulina/análise , Sêmen/química , Somatomedinas/análise , Animais , Bovinos , Eletroforese em Gel de Poliacrilamida/veterinária , Humanos , Ligantes , MasculinoRESUMO
BACKGROUND: Tumours of the eyelid and orbit with different biological behaviour and localisation may cause eyelid swelling. Orbital meningiomas are rare, particularly in childhood and adolescence. CASE REPORT: We report the case of an 8-year-old girl with frontobasal meningioma, who was admitted to the hospital because of a one-sided upper eyelid swelling. With the example of this case, the diagnosis, treatment and aftercare of meningiomas in childhood and adolescence will be discussed. CONCLUSIONS: The treatment strategy of meningiomas in childhood requires a close interdisciplinary cooperation of ophthalmology, paediatric oncology, neurosurgery and radiotherapy. Moreover, controlled investigations should yield information about the efficiency of modern irradiation techniques or adjuvant chemotherapy in the treatment of inoperable or malignant meningiomas.
Assuntos
Edema/diagnóstico , Edema/etiologia , Neoplasias Palpebrais/complicações , Neoplasias Palpebrais/diagnóstico , Meningioma/complicações , Meningioma/diagnóstico , Adolescente , Criança , Doenças Palpebrais/complicações , Doenças Palpebrais/diagnóstico , Feminino , HumanosRESUMO
Pediatric patients with relapsed metastatic tumors have a poor prognosis and new treatment strategies are warranted. We present preliminary results of a pilot study, evaluating the feasibility and toxicity of transplantation of haploidentical T and B cell depleted grafts with high numbers of NK cells. 6 patients with relapsed metastatic neuroblastomas (n = 4), rhabdomyosarcoma (n = 1) or Ewing's sarcoma (n = 1) after previous autologous transplantation received CD3/CD19 depleted grafts from mismatched family donors with a median number of 16 x 10 (6)/kg stem cells, 167 x 10 (6)/kg Natural Killer cells and only 5.4 x 10 (4)/kg residual T cells. A melphalan-based, reduced intensity conditioning was used. Despite pretransplant chemotherapy, patients entered transplantation with significant tumor burden. Primary engraftment occurred in 6/6 patients. One patient had secondary graft failure. Hematopoietic recovery was rapid (ANC > 0.5 x 10 (9)/L: 11 days (9-12); independence from platelet substitution: 8 days (7-11)). Four patients had acute GvHD grade II, limited chronic GvHD was observed in 2 patients. No transplant-related mortality and only low toxicity occurred. Four patients died from progression, two patients are alive. Overall median survival time is 6 months (2-11) to date. Analysis of posttransplant NK cell function revealed stable cytotoxic activity against K562 targets, whereas activity against neuroblastoma targets was low. Stimulation with cytokines and use of appropriate antibodies clearly enhanced specific lysis in vitro. In summary, these preliminary results indicate the feasibility and low toxicity even in intensively pre-treated patients with neuroblastomas/sarcomas. This approach may form the basis for posttransplant immunomodulation and other therapeutic strategies. Further experience is warranted to evaluate the method.
Assuntos
Efeito Enxerto vs Tumor , Células Matadoras Naturais/imunologia , Neuroblastoma/terapia , Transplante de Células-Tronco de Sangue Periférico , Rabdomiossarcoma/terapia , Sarcoma de Ewing/terapia , Doença Aguda , Adolescente , Adulto , Criança , Pré-Escolar , Testes Imunológicos de Citotoxicidade , Progressão da Doença , Estudos de Viabilidade , Seguimentos , Haploidia , Humanos , Projetos Piloto , Fatores de Tempo , Condicionamento Pré-Transplante , Transplante Homólogo , Resultado do TratamentoRESUMO
Insulin-like growth factor (IGF)-I and IGF-II serum and kidney tissue concentrations were measured in compensatory kidney growth in infantile and adult rats. We hypothesized that the known switch from IGF-II in fetal life to IGF-I in adult life may be responsible for the different modes of compensatory kidney growth, which are mainly characterized by hyperplasia in infantile rats and hypertrophy in adult rats. While IGF-I serum concentrations increased with age in infantile rats, kidney tissue concentrations of IGF-I showed a similar increase in both age groups after uninephrectomy. In adult rats, serum and kidney tissue concentrations of IGF-II were unchanged by uninephrectomy. In infantile rats, however, a significant increase in both serum and kidney concentrations of IGF-II was observed with a maximum at day 5 after uninephrectomy. To investigate if compensatory kidney growth is dependent on hyperperfusion of the remnant kidney, the left renal artery was clipped in infantile rats. The clipped kidney showed growth retardation despite normal kidney tissue concentrations of IGF-I and IGF-II. The contralateral kidney was enlarged and IGF-II kidney concentrations were elevated. However, animals with one clipped kidney and nephrectomy of the contralateral kidney showed compensatory kidney growth of the clipped kidney combined with increased IGF-II kidney tissue concentrations. We conclude that IGF-II mainly promotes compensatory kidney growth in infantile rats by hyperplasia. Hyperperfusion of the remnant kidney seems to be unnecessary for initiation of compensatory kidney growth.
Assuntos
Fator de Crescimento Insulin-Like II/metabolismo , Rim/crescimento & desenvolvimento , Envelhecimento/metabolismo , Envelhecimento/fisiologia , Animais , Peso Corporal , Hiperplasia , Hipertrofia , Fator de Crescimento Insulin-Like I/metabolismo , Rim/metabolismo , Masculino , Nefrectomia , Tamanho do Órgão , Radioimunoensaio , Ratos , Ratos Sprague-DawleyRESUMO
The case of an eight year old girl is presented who was seen because of secondary enuresis and recurrent urinary tract infection. Detailed examinations revealed urinary retention and sustained renal insufficiency (Creatinine clearance: 11 ml/min x 1.73 m2) due to a pseudo-neurogenic bladder. After improvement of renal function by continuous bladder drainage, bladder dysfunction was successfully treated by medication (Phenoxybenzamine, Baclofen), conventional physical therapy and biofeedback.
Assuntos
Injúria Renal Aguda/diagnóstico , Bexiga Urinaria Neurogênica/diagnóstico , Retenção Urinária/diagnóstico , Injúria Renal Aguda/terapia , Baclofeno/administração & dosagem , Biorretroalimentação Psicológica , Criança , Terapia Combinada , Feminino , Seguimentos , Humanos , Fenoxibenzamina/administração & dosagem , Modalidades de Fisioterapia , Síndrome , Bexiga Urinaria Neurogênica/terapia , Retenção Urinária/terapiaRESUMO
The objective of this study was to quantify insulin-like growth factor (IGF) binding proteins (IGFBPs) in the synovial fluid (SF) and plasma of patients with rheumatic diseases and to study the role of these proteins in the regulation of cartilage proteoglycan (PG) synthesis. Immunological determination of IGFBP-2, IGFBP-3, IGF-I, IGF-II, interleukin-1 beta (IL-1 beta) and tumour necrosis factor alpha (TNF alpha) was undertaken in the SF and plasma of 115 patients with rheumatoid arthritis (RA; n = 53), osteoarthritis (OA; n = 44) and other rheumatic disorders. We also determined the effects of SF on bovine cartilage PG synthesis in culture. IGFBP-2 and IGFBP-3 were elevated in the plasma (by 38% and 28%, respectively) and SF (by 56% and 59%, respectively) of patients with RA compared to age- and sex-matched OA controls (determined by RIA and confirmed by Western ligand blot). IGF-I and IGF-II did not differ significantly between the two groups. OA SF, and, to a lesser extent, RA SF stimulated cartilage PG synthesis in culture, and more than 60% of this activity was neutralised by a specific monoclonal anti-IGF-I antibody. Human IGFBP-3 dose-dependently inhibited the stimulation of cartilage PG synthesis effected by SF or human IGF-I. In RA patients, the SF concentration of IGFBP-3 was positively correlated with SF levels of IL-1 beta and TNF alpha, with the serum levels of C-reactive protein and with the erythrocyte sedimentation rate. We concluded that IGF-I is, under the conditions studied, the most important anabolic factor in human SF with respect to articular cartilage PG synthesis. The bioactivity of IGF-I in joints is modulated by IGFBP-3, which is elevated in RA SF compared to OA SF. Elevated IGFBP-3 in RA SF may reduce the availability of IGF-I to articular chondrocytes, thus interfering with cartilage PG synthesis in RA.
Assuntos
Artrite Reumatoide/metabolismo , Cartilagem/metabolismo , Proteína 3 de Ligação a Fator de Crescimento Semelhante à Insulina/biossíntese , Fator de Crescimento Insulin-Like I/farmacologia , Proteoglicanas/biossíntese , Líquido Sinovial/metabolismo , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Animais , Artrite Reumatoide/patologia , Cartilagem/efeitos dos fármacos , Bovinos , Técnicas de Cultura , Antagonismo de Drogas , Feminino , Humanos , Proteína 3 de Ligação a Fator de Crescimento Semelhante à Insulina/farmacologia , Masculino , Pessoa de Meia-IdadeRESUMO
The expression of the insulin-like growth factor binding protein-2 (IGFBP-2) was assayed in mononuclear cells originating from different organs of the immune system. All mononuclear cells studied did express IGFBP-2, but the expression level was found to be dependent on the cell type and origin of the cell. T cells showed a higher expression of IGFBP-2 mRNA than did B cells, and CD34+ stem cells expressed IGFBP-2 mRNA at a high level. Expression was highest in bone marrow and thymus. Stimulation of peripheral mononuclear cells resulted in a marked increase of IGFBP-2 mRNA and also intracellular IGFBP-2, as analysed by fluorescence staining. This increase parallels the increase of other known T-cell activation markers. Furthermore, the increase of intracellular IGFBP-2 seems to precede T-cell blast formation and all T cells in active phases of the cell cycle have high levels of IGFBP-2. Our results provide a basis for further investigations on the contribution of the IGF-system to the regulation of T-cell proliferation and differentiation. IGFBP-2, in particular, may have an important influence in the regulation of T-cell activation and proliferation.