RESUMEN
We focused on over-dose insulin (250 IU/kg i.p.) induced gastric ulcers and then on other disturbances that were concomitantly induced in rats, seizures (eventually fatal), severely damaged neurons in cerebral cortex and hippocampus, hepatomegaly, fatty liver, increased AST, ALT and amylase serum values, breakdown of liver glycogen with profound hypoglycemia and calcification development. Calcium deposits were present in the blood vessel walls, hepatocytes surrounding blood vessels and sometimes even in parenchyma of the liver mainly as linear and only occasionally as granular accumulation. As an antidote after insulin, we applied the stable gastric pentadecapeptide BPC 157 (10 microg/kg) given (i) intraperitoneally or (ii) intragastrically immediately after insulin. Controls received simultaneously an equivolume of saline (5 ml/kg). Those rats that survived till the 180 minutes after over-dose application were further assessed. Interestingly, pentadecapeptide BPC 157, as an antiulcer peptide, may besides stomach ulcer consistently counteract all insulin disturbances and fatal outcome. BPC 157 rats showed no fatal outcome, they were mostly without hypoglycemic seizures with apparently higher blood glucose levels (glycogen was still present in hepatocytes), less liver pathology (i.e., normal liver weight, less fatty liver), decreased ALT, AST and amylase serum values, markedly less damaged neurons in brain and they only occasionally had small gastric lesions. BPC 157 rats exhibited mostly only dot-like calcium presentation. In conclusion, the success of BPC 157 therapy may indicate a likely role of BPC 157 in insulin controlling and BPC 157 may influence one or more causative process(es) after excessive insulin application.
Asunto(s)
Antiulcerosos/uso terapéutico , Antídotos/uso terapéutico , Hipoglucemia/prevención & control , Hipoglucemiantes/toxicidad , Insulina/toxicidad , Fragmentos de Péptidos/uso terapéutico , Proteínas/uso terapéutico , Úlcera Gástrica/prevención & control , Animales , Antiulcerosos/administración & dosificación , Antídotos/administración & dosificación , Encéfalo/efectos de los fármacos , Encéfalo/patología , Calcinosis/inducido químicamente , Calcinosis/prevención & control , Sobredosis de Droga/tratamiento farmacológico , Endotelio Vascular/efectos de los fármacos , Endotelio Vascular/patología , Glucógeno/metabolismo , Hepatomegalia/inducido químicamente , Hepatomegalia/patología , Hepatomegalia/prevención & control , Hipoglucemia/inducido químicamente , Hipoglucemia/complicaciones , Hipoglucemia/mortalidad , Hígado/irrigación sanguínea , Hígado/efectos de los fármacos , Hígado/metabolismo , Hígado/patología , Masculino , Neuronas/efectos de los fármacos , Neuronas/patología , Neuronas/fisiología , Fragmentos de Péptidos/administración & dosificación , Proteínas/administración & dosificación , Ratas , Ratas Wistar , Convulsiones/etiología , Convulsiones/prevención & control , Úlcera Gástrica/inducido químicamente , Úlcera Gástrica/patologíaRESUMEN
S-Adenosylhomocysteine (AdoHcy) hydrolase deficiency has been proven in a human only once, in a recently described Croatian boy. Here we report the clinical course and biochemical abnormalities of the younger brother of this proband. This younger brother has the same two mutations in the gene encoding AdoHcy hydrolase, and has been monitored since birth. We report, as well, outcomes during therapy for both patients. The information obtained suggests that the disease starts in utero and is characterized primarily by neuromuscular symptomatology (hypotonia, sluggishness, psychomotor delay, absent tendon reflexes, delayed myelination). The laboratory abnormalities are markedly increased creatine kinase and elevated aminotransferases, as well as specific amino acid aberrations that pinpoint the aetiology. The latter include, most importantly, markedly elevated plasma AdoHcy. Plasma S-adenosylmethionine (AdoMet) is also elevated, as is methionine (although the hypermethioninaemia may be absent or nonsignificant in the first weeks of life). The disease seems to be at least to some extent treatable, as shown by improved myelination and psychomotor development during dietary methionine restriction and supplementation with creatine and phosphatidylcholine.
Asunto(s)
Adenosilhomocisteinasa/deficiencia , Adenosilhomocisteinasa/genética , Aminoácidos/química , Encéfalo/patología , Preescolar , Creatina Quinasa/sangre , Croacia , Metilación de ADN , Eritrocitos/metabolismo , Exones , Salud de la Familia , Humanos , Lactante , Imagen por Resonancia Magnética , Espectroscopía de Resonancia Magnética , Masculino , Metionina/metabolismo , Mutación , Vaina de Mielina/química , Factores de Tiempo , Transaminasas/sangre , Resultado del TratamientoRESUMEN
A 14-year old boy was admitted for signs of heart failure and scapuloperoneal muscle weakness. He fulfilled the clinical, functional and diagnostic criteria for dilated cardiomyopathy. There was also a moderate increase in pulmonary vascular resistance. The immunohistochemical examination of the heart muscle revealed a slightly positive phytohemagglutinin reaction and minimal IgM deposits without complement. The electron microscopy examination disclosed increased numbers of abnormal mitochondria disrupting the usual cell structure; the mitochondria were of various sizes with irregular and abnormal structure of the cristae. The scapuloperoneal spinal muscular atrophy was mild and diagnosed according to clinical and electromyographic findings. Light microscope examination of the skeletal muscle revealed hypotrophic fibers. This patient is presumed to have postinflammatory mitochondriopathy and is currently being managed on low-dose digitalis, diuretics and captopril.
Asunto(s)
Cardiomiopatía Dilatada/complicaciones , Miopatías Mitocondriales/patología , Atrofia Muscular Espinal/complicaciones , Adolescente , Cardiomiopatía Dilatada/patología , Humanos , Masculino , Mitocondrias Cardíacas/ultraestructura , Mitocondrias Musculares/ultraestructura , Atrofia Muscular Espinal/patologíaRESUMEN
In the present work the expression of vimentin and glial fibrillary acidic protein (GFAP) was determined in homotypic, transitional and heterotypic astroglial neoplastic areas and gemistocytes. The expression of these intermediate filament (IF) proteins within oligodendroglial neoplastic cells was determined as well. The intensity of vimentin and GFAP immunoreactivity as well as the number of immunoreactive cells within astroglial areas of different grades of differentiation were different. While there was no immunoreactivity within heterotypic areas, transitional areas and gemistocytes mainly show the same intensity of immunoreactivity and number of immunoreactive cells for both analyzed IF proteins. Within homotypic astroglial areas the number of GFAP positive cells and intensity of GFAP immunoreactivity were higher than the same vimentin parameters. It is well known that vimentin and GFAP may form heteropolymers both in vitro and in vivo. Transitions in vimentin/GFAP expression reflect not only normal development of astroglial cells but occur also with the induction of neoplastic process. Our results suggest that immunoreaction intensity and number of vimentin or GFAP immunoreactive cells correlates with the degree of differentiation of specific neoplastic cell populations. It is suggested that transitions in vimentin and GFAP expression occur in the course of neoplastic progression presumably by the modulation of their incorporation into the same IF system according to the degree of neoplastic cell differentiation.
Asunto(s)
Neoplasias Encefálicas/química , Transformación Celular Neoplásica/metabolismo , Proteína Ácida Fibrilar de la Glía/análisis , Glioma/química , Vimentina/análisis , HumanosRESUMEN
In this paper eight patients with myogenic or neurogenic muscle disorders are presented, in whom cardiomiopathy was also found. Six patients developed a dilated cardiomiopathy associated with neurogenic atrophies or progressive muscular dystrophy. In patients with Mb. Friedreich and HSNM type II together with the total dilatation of the septum hypertrophy was observed and in patients with spinal muscular amyotrophy of scapuloperoneal type atriomyopathy dominated. In two patients with mitochondrial disorders a hypertrophic cardiomyopathy was found. One of them had mitochondrial encephalomyoneuropathy and the other mitochondrial encephalopathy with myoclonic epilepsy. In none of them a restrictive cardiomyopathy was found. From the presentation could be concluded that in neurogenic muscle diseases and progressive muscular dystrophy respectively most frequently dilated cardiomyopathies have been developed. Hypertrophic cardiomyopathies are usually found in children with mitochondrial disorders.
Asunto(s)
Cardiomiopatía Dilatada/complicaciones , Cardiomiopatía Hipertrófica/complicaciones , Enfermedades Neuromusculares/complicaciones , Adolescente , Cardiomiopatía Dilatada/diagnóstico , Cardiomiopatía Hipertrófica/diagnóstico , Niño , Preescolar , Electrocardiografía , Femenino , Humanos , Lactante , MasculinoRESUMEN
A case of medullomyoblastoma, arising in the cerebellar vermis of a five-year-old boy, is presented. The light and electron microscopic features of the tumor are described and compared to other published cases. Within typical medulloblastoma areas light microscopy revealed signs of neuroblastic differentiation thus indicating its neuroepithelial origin. No signs of glial differentiation were found. Myogenic tumor component formed irregular, distinctly separated islands although some intermingling of two cell types was observed at the borders between the two zones. Within the myogenic tumor component, electron microscopy revealed rhabdomyoblastic elements in different stages of differentiation, frequently forming small groups encompassed by the same basement membrane. No indication of a common host cell for two cell lines was observed. No mesenchymal elements other than muscle, and no indication of possible teratoid origin of this tumor were observed. Considering histogenesis of muscle elements within this neuroepithelial tumor, the origin from multipotential neural-crest-derived ectomesenchymal cells seems the most appropriate one.
Asunto(s)
Neoplasias Cerebelosas , Meduloblastoma , Neoplasias Cerebelosas/diagnóstico por imagen , Neoplasias Cerebelosas/patología , Preescolar , Humanos , Masculino , Meduloblastoma/diagnóstico por imagen , Meduloblastoma/patología , RadiografíaRESUMEN
In this paper three cases with peculiar disease of the cerebellar cortex are presented. The disease is well known as L'hermitte-Duclos disease (LDD), but nowadays it is also called "dysplastic granulo-molecular hypertrophy of the cerebellar cortex" according to the modern theories of its etiology. Curious changes of the cerebellum in LDD are probably the result of a combination of delayed migration of Purkinje cells which occurs during the intrauterine period of cerebellar development, and of reactive hypertrophy of granular cells. Presented cases of L'hermitte-Duclos disease are, according to the literature, more or less typical by their clinical appearance and by their histological findings. Our electromicroscopical data support the findings of those authors who found only axodendritic sinapses on the hypertrophied ganglion cells, according to the idea that those cells are originally granular cells of the cerebellar cortex. CT scan of all our patients revealed parallel, worm-like, hyperdense formations in a hypodense process of the cerebellum. The same picture existed in some other described patients, but attention was paid to it. We consider this picture on the computed tomography to be characteristic, if not even patognomonic for the L'hermitte-Duclos disease, which gives us an entirely new scientific contribution in the process of the diagnosis of this peculiar disease.