Your browser doesn't support javascript.
loading
Show: 20 | 50 | 100
Results 1 - 15 de 15
Filter
1.
Med. interna (Caracas) ; 34(4): 256-261, 2018. ilus
Article in Spanish | LILACS, LIVECS | ID: biblio-1006210

ABSTRACT

Las enfermedades por depósito, representan un amplio espectro clínico de enfermedades. Una de las más frecuentes es la enfermedad de Gaucher, cuyo defecto primordial radica en el almacenamiento de glucosilceramida. Su prevalencia es 1/100.000 habitantes en países del Medio Oriente. En Suramérica es tan infrecuente que no se cuenta con estadísticas claras. Presentamos un paciente de 21 años de edad con antecedentes de diabetes mellitus tipo 1, quien inicia clínica 6 meses previos a su ingreso caracterizado por dolor en hipocondrio derecho, difuso, de moderada intensidad, intermitente, con periodos de acalmia de hasta 10 días, acompañado de náuseas, astenia, hiporexia y adinamia. Durante su hospitalización se realizan estudios de imagen que muestran hepatoesplenomegalia (homogénea) y en el laboratorio se encontraron transaminasas elevadas, anemia persistente y niveles de glucemia variables. Se realizan biopsias hepática y de medula ósea, compatibles con enfermedad por depósito tipo Gaucher. . Esta enfermedad es poco conocida en nuestro país, siendo la de mayor incidencia la enfermedad de Fabry. Se debe considerar la coexistencia con otras enfermedades metabólicas como diabetes tipo 1, que pudieran condicionar su aparición(AU)


Storage diseases represent a broad clinical spectrum. Gaucher´s disease, in which the primary defect lies in the storage of glucosylceramide has a prevalence of 1/100.000 in countries of the Middle East. In South America this disease is so infrequent, that there is no clear information about the prevalence. We present the case a 21-year old patient, with diabetes mellitus type 1 and a history of intermittent abdominal pain in the right hypochondrium, moderate intensity, nausea, asthenia, and hyporexia. The image studies showed homogeneous hepatosplenomegaly. The laboratory workup reported elevated transaminases, persistent anemia and fluctuating blood glucose levels. Hepatic and bone marrow biopsies were compatible with Gaucher type III disease. This disease is little known in our country, were Fabry´s disease is more common. Coexistence with other metabolic diseases such as diabetes should be considered(AU)


Subject(s)
Humans , Male , Adult , Diabetes Mellitus/genetics , Gaucher Disease/complications , Gaucher Disease/diagnostic imaging , Glucosylceramides/adverse effects , Genetic Diseases, Inborn
2.
Braz. j. pharm. sci ; 46(4): 643-649, Oct.-Dec. 2010. ilus, graf, tab
Article in English | LILACS | ID: lil-622863

ABSTRACT

Gaucher disease is a sphingolipidosis that leads to an accumulation of glucosylceramide. The objective of this study was to develop a methodology, based on the extraction, purification and quantification of glucosylceramide from blood plasma, for use in clinical research laboratories. Comparison of the glucosylceramide content in plasma from Gaucher disease patients, submitted to enzyme replacement therapy or otherwise, against that from normal individuals was also carried out. The glucosylceramide, separated from other glycosphingolipids by high performance thin layer chromatography (HPTLC) was chemically developed (CuSO4 / H3PO4) and the respective band confirmed by immunostaining (human anti-glucosylceramide antibody / peroxidase-conjugated secondary antibody). Chromatogram quantification by densitometry demonstrated that the glucosylceramide content in Gaucher disease patients was seventeen times higher than that in normal individuals, and seven times higher than that in patients on enzyme replacement therapy. The results obtained indicate that the methodology established can be used in complementary diagnosis and for treatment monitoring of Gaucher disease patients.


A doença de Gaucher é uma esfingolipidose caracterizada pelo acúmulo de glicosilceramida. O objetivo deste estudo foi desenvolver metodologia baseada na extração, purificação e quantificação da glicosilceramida plasmática a qual possa ser usada em laboratórios de pesquisa clínica. Após o desenvolvimento desta metodologia, foi proposto, também, comparar o conteúdo de glicosilceramida presente no plasma de pacientes com doença de Gaucher, submetidos ou não a tratamento, com aquele de indivíduos normais. A glicosilceramida, separada de outros glicoesfingolipídios por cromatografia de camada delgada de alto desempenho (HPTLC), foi revelada quimicamente (CuSO4/H3PO4) e a respectiva banda foi confirmada por imunorrevelação (anticorpo anti-glicosilceramida humana/anticorpo secundário conjudado à peroxidase). A quantificação do cromatograma por densitometria demonstrou que o conteúdo de glicosilceramida nos pacientes com doença de Gaucher era 17 vezes maior que aquele de indivíduos normais e 7 vezes maior que aquele dos pacientes com doença de Gaucher submetidos a tratamento com terapia de reposição enzimática. Os resultados obtidos demonstram que a metodologia estabelecida pode ser usada como diagnóstico complementar e como monitoração do tratamento de pacientes com doença de Gaucher.


Subject(s)
Humans , Gaucher Disease/blood , Glucosylceramides/chemistry , Glucosylceramides/blood , Diagnostic Techniques and Procedures/statistics & numerical data , Analysis of Variance , Blood Chemical Analysis/methods , Chromatography, High Pressure Liquid/methods
3.
Nutrition Research and Practice ; : 362-368, 2010.
Article in English | WPRIM | ID: wpr-69838

ABSTRACT

Oral administration of royal jelly (RJ) promotes wound healing in diabetic mice. Concerns have arisen regarding the efficacy of RJ on the wound healing process of normal skin cells. In this study, a wound was created by scratching normal human dermal fibroblasts, one of the major cells involved in the wound healing process. The area was promptly treated with RJ at varying concentrations of 0.1, 1.0, or 5 mg/ml for up to 48 hrs and migration was analyzed by evaluating closure of the wound margins. Furthermore, altered levels of lipids, which were recently reported to participate in the wound healing process, were analyzed by HPTLC and HPLC. Migration of fibroblasts peaked at 24 hrs after wounding. RJ treatment significantly accelerated the migration of fibroblasts in a dose-dependent manner at 8 hrs. Although RJ also accelerated the migration of fibroblasts at both 20 hrs and 24 hrs after wounding, the efficacy was less potent than at 8 hrs. Among various lipid classes within fibroblasts, the level of cholesterol was significantly decreased at 8 hrs following administration of both 0.1 ug/ml and 5 mg/ml RJ. Despite a dose-dependent increase in sphinganines, the levels of sphingosines, ceramides, and glucosylceramides were not altered with any concentration of RJ. We demonstrated that RJ enhances the migration of fibroblasts and alters the levels of various lipids involved in the wound healing process.


Subject(s)
Animals , Humans , Mice , Administration, Oral , Ceramides , Cholesterol , Chromatography, High Pressure Liquid , Fatty Acids , Fibroblasts , Glucosylceramides , Skin , Sphingosine , Wound Healing
4.
Rev. bras. hematol. hemoter ; 30(3): 193-201, 2008. ilus, tab, graf
Article in Portuguese | LILACS | ID: lil-496301

ABSTRACT

A doença de Gaucher tipo 1 é a doença de depósito lisossômico mais freqüente. De herança autossômica recessiva, é caracterizada pela deficiência da atividade da enzima glicocerebrosidase e o acúmulo patológico de seu substrato, a glicosilceramida, nas células da linhagem dos monócitos/macrófagos principalmente no baço, fígado e medula óssea. As manifestações são heterogêneas e incluem hepatoesplenomegalia, anemia, trombocitopenia, infiltração da medula óssea e lesões esqueléticas. Avaliaram-se os efeitos da terapia de reposição enzimática (TRE) sobre a anemia, trombocitopenia, hepatoesplenomegalia, estatura (crianças e adolescentes) e dor óssea em noventa pacientes com doença de Gaucher tipo 1 tratados por período de 24 meses no estado de São Paulo. Os principais sinais e sintomas antes do início do tratamento foram anemia (50 por cento), trombocitopenia (59 por cento), hepatomegalia (97 por cento), esplenomegalia (96 por cento), baixa estatura (46 por cento) e dor óssea (62 por cento). A dose média de TRE foi 35U/kg a cada duas semanas. A recuperação da anemia, da trombocitopenia e da dor óssea foi mais intensa aos seis meses de tratamento, e da hepatoesplenomegalia e da baixa estatura aos 18 meses. Após a melhora, a maioria dos pacientes manteve-se estável. Ao final de 24 meses de TRE, pelo menos 88 por cento dos pacientes atingiram os objetivos terapêuticos para anemia, 80 por cento para trombocitopenia, 34 por cento para hepatoesplenomegalia, 77 por cento para baixa estatura e 76 por cento para dor óssea. Novos estudos são necessários para avaliar a resposta terapêutica em longo prazo, principalmente em relação às alterações ósseas e de estatura, que podem apresentar resposta mais tardia e lenta.


Type 1 Gaucher's disease, the most common lysosomal storage disorder, is caused by an autosomal recessive deficiency of glucocerebrosidase that results in a pathologic accumulation of its substrate, glucocerebroside, in the cells of the monocyte/macrophage lineage mainly of the spleen, liver and bone marrow. The symptoms are heterogeneous and include hepatosplenomegaly, anemia, thrombocytopenia, bone marrow infiltration, and skeletal lesions. We evaluated the effects of enzyme replacement therapy (ERT) on anemia, thrombocytopenia, hepatosplenomegaly, growth retardation (children and adolescents) and bone pain among 90 patients with type 1 Gaucher's disease treated during 24 months in Sao Paulo State. Baseline signs and symptoms were anemia (50 percent), thrombocytopenia (59 percent), hepatomegaly (97 percent), splenomegaly (96 percent), growth retardation (46 percent) and bone pain (62 percent). The mean dose of ERT was 35 U/kg every two weeks. Reduction in anemia, thrombocytopenia and bone pain was greatest during the first six months of ERT and of hepatosplenomegaly and growth retardation within 18 months. Improvements were sustained by most of the patients during the follow-up. Within 24 months of ERT, therapeutic goals were achieved in at least 88 percent of patients with anemia, 80 percent with thrombocytopenia, 34 percent with hepatosplenomegaly, 77 percent with growth retardation and 76 percent with bone pain. Other studies are needed to evaluate the treatment efficacy over a longer period, mainly for skeletal lesions and growth retardation, which may present a slower recovery due to low penetration of imiglucerase in bones.


Subject(s)
Gaucher Disease , Spleen , Splenomegaly , Therapeutics , Thrombocytopenia , Treatment Outcome , Enzyme Replacement Therapy , Glucosylceramidase , Glucosylceramides , Hepatomegaly , Anemia , Macrophages
5.
Tunisie Medicale [La]. 2005; 83 (1): 43-47
in French | IMEMR | ID: emr-75253

ABSTRACT

Gaucher's disease, rare, hereditary and potentially mortal affection is characterized by the reduced concentration of the glucocerebroside lipid within the macrophage lysosomes. We report the case of a young 2 years old patient treated by transfusion since he was 9 months because of chronic anemia. According the clinical examination, the general state of the patients was bad with important delayed stanturoponderal growth, a cutaneomucous paller and enormous splenomegaly. The blood count formula showed anemia with major thrombocytopenia. The myelogram was poor and the osteomedullar biopsy showed the presence of Gaucher's cells. The diagnosis has been confirmed by enzymatic dosage [Leucocytar b-glucosidase]. The treatment of the patient has been substitutive enzymatic [inifucerase] with very favorable response. During Gaucher's disease, the enzymatic deficiency results in the pathologic accumulation of the substrate [glucocerebroside] in the lyososomes, this metabolic overloading may cause polyvisceral disease with spontaneous evolution after mortal. The recent discovery of a recombining glucocerebrosidase [imiglucerase] transformed the prognosis of this disease


Subject(s)
Humans , Male , Gaucher Disease/drug therapy , Glucosylceramidase , Lysosomes , Review , Glucosylceramides
6.
Acta Pharmaceutica Sinica ; (12): 525-527, 2004.
Article in Chinese | WPRIM | ID: wpr-302771

ABSTRACT

<p><b>AIM</b>To study the bioactive components from Helicia nilagirica.</p><p><b>METHODS</b>Compounds were separated with a combination of multi-chromatography. Their chemical structures were determined on the basis of spectral analysis and chemical evidence.</p><p><b>RESULTS</b>Two compounds were isolated from the leaves of Helicia nilagirica. Compound 1 was elucidated as 1-O-3-D-glucopyranosyl-(2S,3S,4R,8Z)-2-[(2'R)-2'-hyd roxylignocenoyl-amino]-8-octadecene-1, 3, 4-triol. Compound 2 was an analogue of 1.</p><p><b>CONCLUSION</b>The two compounds are new cerebrosides.</p>


Subject(s)
Cerebrosides , Chemistry , Glucosylceramides , Chemistry , Molecular Conformation , Molecular Structure , Plant Leaves , Chemistry , Plants, Medicinal , Chemistry , Proteaceae , Chemistry
7.
Chinese Journal of Medical Genetics ; (6): 381-384, 2003.
Article in Chinese | WPRIM | ID: wpr-329454

ABSTRACT

<p><b>OBJECTIVE</b>To design and make trial of a new therapy for Gaucher disease.</p><p><b>METHODS</b>A substrate analogue of beta-Glc (glucocerebroside analogue, GCA) was used as a molecular chaperon. Normal and mutant skin fibroblasts were cultured with or without GCA. The activity of beta-Glc was assayed by fluorescent enzymologic techniques. The amount of beta-Glc was determined using Western blot. The beta -Glc was localized by double cell stain experiment. The degradation of glucocerebroside was assessed by thin layer chromatography (TLC) experiment using 14C-Serine.</p><p><b>RESULTS</b>It was found that GCA could enhance the activity and amount of beta-Glc with F213I mutation. It also promoted the beta-Glc with F213I mutation to the lysosome and accelerated the degradation of glucocerebroside.</p><p><b>CONCLUSION</b>The low molecular compound analogous to beta-Glc substrate (GCA ) may be a new therapeutic strategy for Gaucher's disease with F213I mutation.</p>


Subject(s)
Humans , Amino Acid Substitution , Blotting, Western , Cells, Cultured , Enzyme Induction , Gaucher Disease , Drug Therapy , Genetics , Glucosylceramidase , Genetics , Metabolism , Glucosylceramides , Metabolism , Pharmacology , Immunohistochemistry , Mutation , Substrate Specificity
8.
São Paulo; s.n; 2003. [78] p.
Thesis in Portuguese | LILACS | ID: lil-352268

ABSTRACT

Este estudo analisou o perfil cromatográfico dos glicoesfingolipídeos neutros e gangliosídeos de 18 invertebrados. Glicoesfingohpídeos (GSLs) totais foram purificados em colunas de DEAE-Sephadex e Florisil. Em todas as amostras de GSLs neutros observou-se monohexosil ceramida (CMH). Os GSLs foram quantificados após fracionamento por cromatografia de alta resolução em camada delgada (HPTLC) e coloração com orcinol por densitometria 525 nm. As concentrações totais de GSLs neutros variaram de 0,1 g de GSLs/g de tecido na renda a 93,50 g de GSLs/g de tecido no tenébrio. Estudos sobre a identificação dos CIXIS foram realizados após purificação por HPTLC preparativa. As bandas de CI IS puras foram submetidas a hidrólise ácida total com ácido trifluoroacético e o açúcar encontrado em quase todos os CXIHs dos invertebrados foi a glucose. Resíduos de manose foram observados nos CNIFIs da bolacha-do-mar, grilo, abelha e besouro, e fucose somente no CXZI-IP1 do pepino-do-mar. Por hidrólise ácida total, para a identificação dos açúcares dos diferentes CDHs, detectou-se a presença de resíduos de glucose, galactose e manose. A partir dos fitos Echinodermata e Xfollusca foram detectados, em concentrações relevantes, GSLs neutros com cadeias mais longas como CDH, CTH e globosídeo, sugerindo que animais filogeneticamente superiores a Platyhelminthes expressam uma maior diversidade de glicosiltransferases. Entre 18 invertebrados estudados, somente quatro animais apresentaram gangliosídeos com concentrações totais que variam de 1,26 g de GSLs/g de tecido no pepino-do-mar a 9,60g de GSLs/g de tecido na bolacha-do-mar. A presença de CMHs contendo ácidos graxos 2-hidroxilados foi analisada por imunocoloração de placas de HPTLC utilizando o mAb MEST-2. CMHs reativos com o mAb MEST-2 foram detectados em: esponja, anêmona-do-mar, pepino-do-mar e marisco. Os CMHs foram também analisados por radioimunoensaio de fase sólida quanto a reatividade com mAb MEST-2. Os diferentes CMHs apresentaram reatividade simililares às obtidas por imunocoloração de placas de HPTLC...


Subject(s)
Biological Evolution , Gangliosides , Glucosylceramides , Glycosphingolipids , Invertebrates
9.
Säo Paulo; s.n; 2002. [166] p. ilus, tab, graf.
Thesis in Portuguese | LILACS | ID: lil-308647

ABSTRACT

Para um melhor entendimento da importancia e do papel biológico dos glicoesfingolipídeos (GSLs) e suas relaçoes com as doenças causadas por diferentes fungos patogênicos, nós analisamos as estruturas moleculares de GSLs de diferentes fungos como: Paracoccidioides brasiliensis, Histoplasma capsulatum, Sporothrix schenckii, Candida albicans, Cryptococcus neoformans, Cryptococcus laurentii, Cryptococcus albidus and Aspergillus fumigatus. GSLs de fungos foram isolados e purificados por DEAE-Sephadex, HPLC e HPTLC preparativa. As estruturas foram elucidadas por espectroscopia por 1-D e 2-D NMR, ESIIMS-CID/MS e GC/MS. Foram descritas as estruturas de glicosilinositol fosforilceramidas (GIPCs) presentes nas formas de micélio e levedura de P. brasiliensis: Pb-1 (Galf(31->6(Manpa1-->3)Manpa1->21ns1->P-->1Cer) e Pb-2 (Manpa1->3Manpa1->21ns1->P->1Cer), 0 GIPC Pb-1 apresentou reatividade com todos os soros de pacientes com PCM testados, e esta reatividade é devida ao resíduo terminal de (3-Galf. Foram descritos também os GIPCs de S. schenckii, sendo que os GIPCs da forma de micélio descritos sao: Ss-M1 (Manpa1-->61ns1-->P-->1Cer), Ss-M2 (Manpa1--->3Manpa1->61ns1->P->1Cer), Ss-M3 (Manpa1->3(Galpp1->4)Manpa1->21ns1->P->1Cer), e das formas de levedura sao: Ss-Y1 (Manpa1-->3Manpa1 ->61ns1->P-->1 Cer), Ss-Y2 (Manpa1->3Manpa1->2/61ns1->P->1Cer) e Ss-Y6 (Manpa1->3Manpa1->6GIcNH2a1->21ns1->P->1Cer). Esta foi a primeira descriçao de glicoesfingolipídeos com os "cores" Manpa1-),61ns e GlcNH2a1->21ns. Foram caracterizados também monohexosil ceramidas (CMHs) de P. brasiliensis, H. capsulatum, A. fumigatus, A. niger, Cryptococcus spp, C. albicans e S. schenckii. Estudos estruturais de CMHs de P. brasiliensis e H. capsulatum mostraram a presença de altos níveis de insaturaçao (E)-03 nos ácidos graxo das formas de micélio, quando comparados com as...(au)


Subject(s)
Antibodies, Monoclonal , Fungi , Glucosylceramides , Glycolipids , Molecular Structure
10.
Rev. mex. pueric. ped ; 8(44): 61-68, nov.-dic. 2000. ilus, graf
Article in Spanish | LILACS | ID: lil-302896

ABSTRACT

La enfermedad de Gaucher es un trastorno hereditario, causado por la deficiencia de la enzima glucocerebrosidasa, producida en los lisosomas. Esta enzima participa en el metabolismo del glucolípido cerebrósido; su deficiencia provoca la acumulación de éste en los macrófagos; dichas células se han denominado células de Gaucher y se acumulan en hígado, bazo y médula ósea. Se presenta el caso de dos hermanos con enfermedad de Gaucher tipo 1; con terapia de reemplazo enzimático a base de imiglucerase (cerezyme) endovenoso durante un año, lo que revirtió los síntomas de la enfermedad de Gaucher. La imiglucerase inyectable es una forma modificada de la enzima glucocerebrosidasa, producto obtenido por ingeniería genética, indicada en pacientes con diagnóstico de enfermedad de Gaucher tipo 1.1,2


Subject(s)
Humans , Male , Female , Splenomegaly , Gaucher Disease , Glucosylceramides , Hepatomegaly , Biomedical Engineering/methods
11.
Rev. bras. anal. clin ; 32(1): 39-41, 2000. ilus
Article in Portuguese | LILACS | ID: lil-306217

ABSTRACT

Foi avaliada a excreçäo urinária de oligossacarídeos em pacientes portadores da doença de Gaucher tipo 1 (DG1) comparando-a com aquela de indivíduos normais com o objetivo de se estabelecer um método de identificaçäo para estes pacientes. Amostras de urina foram dessalificadas por cromatografia de gel-filtraçäo e aplicadas em placas de cromatografia de camada delgada (CCD) para a identificaçäo dos oligossacarídeos através de suas bandas correspondentes. Foi observado que a excreçäo de oligossacarídeos na urina, representada por 5 bandas que foram visualizdas após borrifar a placa com uma soluçäo composta por 0,25 porcento de orcinol em ácido sulfúrico 20 porcento, foram identificadas somente nos pacientes com DG1 mas näo nos indivíduos normais. O método foi considerado suficientemente sensível para identificar os indivíduos com o distúrbio, além disso a CCD é uma técnica útil para a detecçäo da DG1, considerando ser um teste feito na urina e com custos relativamente baixos. O problema do método parece ser o tempo necessário para a preparaçäo das amostras


Subject(s)
Humans , Male , Female , beta-Glucosidase , Gaucher Disease/genetics , Glucosylceramidase , Glucosylceramides , Oligosaccharides , Chromatography, Thin Layer , Urine
12.
Bol. méd. postgrado ; 13(3/4): 46-53, jul.-dic. 1997. ilus, tab
Article in Spanish | LILACS | ID: lil-261453

ABSTRACT

Se reporta un caso de enfermedad de Gaucher. La enfermedad es un trastorno familiar crónico raro que se debe a la acumulación progresiva de glucocerebrósido en las células fagociticas del sistema de monocitos y macrófagos. Es producida por el déficit de ß-Glucocerebrosidasa. La enfermedad se hereda de forma autosómica recesiva. Usualmente existen esplenomegalia, anemia, trombocitopenia y leucopenia. Fue necesario practicar esplenectomía. Evolución postoperatoria buena. Una hermana del paciente presenta la enfermedad


Subject(s)
Humans , Male , Adult , Anemia/classification , Cells , Gaucher Disease/diagnosis , Glucosylceramides/administration & dosage , Splenomegaly/diagnosis , Thrombocytopenia/classification
13.
Braz. j. med. biol. res ; 29(11): 1441-4, Nov. 1996. ilus, tab
Article in English | LILACS | ID: lil-187202

ABSTRACT

Twelve different species of neutral monohexosyl ceramides (CMHs) and two species of neutral monohexosyl ceramides were isolated form mycelium and yeast forms of Paracoccidioides brasiliensis, respectively, by a combination of ion-exchange chromatography, HPLC, and HPTLC. The glucosylceramides did not react with sera from patients with paracoccidioidomycosis (PCM). Carbohydrate analysis indicated that CMHs contain glucose. Analysis of (1)H-NMR and mass spectrometry data suggest that the structure of the CMHs is Glcpbeta1(Cer (mycelium forms present 12 different ceramides and yeast forms present 2 different ceramides). The composition of the lipid moieties was analyzed by negative fast atom bombardment mass spectrometry. No glycosphingolipid other than glucosylceramide was detected in P. brasiliensis.


Subject(s)
Animals , Glucosylceramides/isolation & purification , Paracoccidioides/chemistry , Chromatography , Glucosylceramides/chemistry , Magnetic Resonance Spectroscopy , Mass Spectrometry
14.
Braz. j. med. biol. res ; 27(2): 317-22, Feb. 1994. tab
Article in English | LILACS | ID: lil-140270

ABSTRACT

We studied the role of the association between glycosylphosphatidylinositol (GPI)-anchored proteins and glycosphingolipid (GSL) clusters in apical targeting using gD1-DAF, a GPI-anchored protein that is sorted differentially by three epithelial cell lines. Differently from MDCK cells, where both gD1-DAF and glucosylceramide (GlcCer) are sorted to the apical membrane, in MDCK Concanavalin A-resistant cells (MDCK-ConAr) gD1-DAF was mis-sorted to both surfaces but GlcCer was still targeted to the apical surface. In both MDCK and MDCK-ConAr cells, gD1-DAF became associated with TX-100 insoluble GSL clusters during transport to the cell surface. In contrast to MDCK cells, the Fischer rat thyroid (FRT) cell line targeted both gD1-DAF and GlcCer basolaterally. Both MDCK and FRT cells had the ability to assemble GSLs into TX-100-insoluble complexes, but, surprisingly, in FRT cells, gD1-DAF did not associate with GSLs and, therefore, remained completely soluble in TX100. This clustering defect in FRT cells correlated with the absence of VIP21/caveolin, a protein localized to both the plasma membrane caveolae and the TGN. This suggests that VIP21/caveolin may have an important role in recruiting GPI-anchored proteins into GSL complexes, necessary for their apical sorting. However,since MDCK-ConAr cells expressed caveolin and clustered GPI-anchored proteins normally, yet mis-sorted them, our results also indicate that clustering and caveolin are not sufficient for apical targeting and that additional factors are required for the accurate apical sorting of GPI-anchored proteins


Subject(s)
Epithelium/cytology , Phosphatidylinositols/classification , Glycolipids/classification , Glycosphingolipids , Cell Line , Concanavalin A , Glucosylceramides
15.
Rev. colomb. gastroenterol ; 5(1): 33-9, ene.-mar. 1990. ilus, tab
Article in Spanish | LILACS | ID: lil-221457

ABSTRACT

La enfermedad de Gaucher es un desorden hereditario en el metabolismo de los glucocerebrósidos (glucosil ceramidas). Es causada por la deficiencia de glucocerebridasa lisosomal que cataliza la liberación de glucosa de la glucosil ceramida. El exceso de este glucocerebrósido se acumula en las células reticuloendoteliales, las cuales toman su apariencia característica. Masas de estas células de Gaucher infiltran y hacen crecer órganos como el bazo, hígado, nodos linfáticos y alternan la estructura y función de otros órganos como huesos y pulmones. Se han reconocido variantes de esta enfermedad, las cuales parecen ser debidas a diferentes mutaciones, afectando el mismo locus genético o un similar. Se presentan dos casos de esta enfermedad en dos hermanos de raza negra, procedentes de Buenaventura (Valle). El mayor se sexo masculino tiene 18 años, y la hermana 16 años. No hay otros casos en la familia. Se presentan con hepatoesplenomegalia gigante, retardo en el desarrollo físico y sexual y uno de ellos con convulsiones. Se hace el diagnóstico por medio de aspirado y biopsia de medula osea


Subject(s)
Humans , Male , Female , Adolescent , Gaucher Disease/diagnosis , Glucosylceramidase , Glucosylceramides , Hepatomegaly
SELECTION OF CITATIONS
SEARCH DETAIL