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1.
Eur J Neurol ; 20(5): 748-55, 2013 May.
Artículo en Inglés | MEDLINE | ID: mdl-22891893

RESUMEN

BACKGROUND AND PURPOSE: In a recent trial in patients with chronic inflammatory demyelinating polyradiculoneuropathy (CIDP), the ICE study, grip strength measurement captured significantly more improvement in patients receiving immune globulin (IGIV-C) intravenously than in those receiving placebo. METHODS: We conducted a systematic analysis to determine the sensitivity of grip strength as an indicator of meaningful clinical changes in CIDP. RESULTS: A randomized double-blind trial was undertaken in 117 CIDP patients who received IGIV-C or placebo every 3 weeks for up to 24 weeks. Grip strength and inflammatory neuropathy cause and treatment (INCAT) disability scores were assessed at each visit, and the responsiveness of each scale was compared. A minimum clinically important difference cut-off value for grip strength (>8 kPa) and INCAT score (>1 point) was applied to assess the proportion of responders to IGIV-C versus placebo. This analysis showed that grip strength demonstrated significant improvement earlier (as early as day 16) than the INCAT disability scale in patients receiving IGIV-C compared with placebo. A significantly higher proportion of improvers were seen in the IGIV-C group (37.5%-50.9%) than in the placebo group (21.1%-25.9%) for grip strength at day 16, week 3, week 6 and the end of the first period. Also, grip strength showed within the first 6 weeks in the placebo group significantly more patients with a clinically meaningful deterioration (>8 kPa), compared with the INCAT (>1-point deterioration) findings. CONCLUSIONS: Grip strength can be considered a sensitive tool for assessing clinically relevant changes in patients with CIDP. Its use in daily practice is suggested.


Asunto(s)
Evaluación de la Discapacidad , Fuerza de la Mano/fisiología , Inmunoglobulinas Intravenosas/uso terapéutico , Factores Inmunológicos/uso terapéutico , Polirradiculoneuropatía Crónica Inflamatoria Desmielinizante/tratamiento farmacológico , Polirradiculoneuropatía Crónica Inflamatoria Desmielinizante/fisiopatología , Método Doble Ciego , Humanos
2.
Clin Exp Immunol ; 158 Suppl 1: 34-42, 2009 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-19883422

RESUMEN

Intravenous immunoglobulin (IVIg) is used increasingly in the management of patients with neurological conditions. The efficacy and safety of IVIg treatment in chronic inflammatory demyelinating polyradiculoneuropathy (CIDP) and Guillain-Barré syndrome (GBS) have been established clearly in randomized controlled trials and summarized in Cochrane systematic reviews. However, questions remain regarding the dose, timing and duration of IVIg treatment in both disorders. Reports about successful IVIg treatment in other neurological conditions exist, but its use remains investigational. IVIg has been shown to be efficacious as second-line therapy in patients with dermatomyositis and suggested to be of benefit in some patients with polymyositis. In patients with inclusion body myositis, IVIg was not shown to be effective. IVIg is also a treatment option in exacerbations of myasthenia gravis. Studies with IVIg in patients with Alzheimer's disease have reported increased plasma anti-Abeta antibody titres associated with decreased Abeta peptide levels in the cerebrospinal fluid following IVIg treatment. These changes at the molecular level were accompanied by improved cognitive function, and large-scale randomized trials are under way.


Asunto(s)
Enfermedades Autoinmunes del Sistema Nervioso/tratamiento farmacológico , Inmunoglobulinas Intravenosas/uso terapéutico , Enfermedad de Alzheimer/tratamiento farmacológico , Síndrome de Guillain-Barré/tratamiento farmacológico , Humanos , Miositis/tratamiento farmacológico , Polirradiculoneuropatía Crónica Inflamatoria Desmielinizante/tratamiento farmacológico
3.
PM R ; 1(1): 5-13, 2009 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-19627867

RESUMEN

BACKGROUND: Distal symmetric polyneuropathy (DSP) is the most common variety of neuropathy. Since the evaluation of this disorder is not standardized, the available literature was reviewed to provide evidence-based guidelines regarding the role of laboratory and genetic tests for the assessment of DSP. METHODS: A literature review using MEDLINE, EMBASE, Science Citation Index and Current Contents was performed to identify the best evidence regarding the evaluation of polyneuropathy published between 1980 and March 2007. Articles were classified according to a four-tiered level of evidence scheme and recommendations were based upon the level of evidence. RESULTS AND CONCLUSIONS: 1. Screening laboratory tests may be considered for all patients with polyneuropathy (Level C). Those tests that provide the highest yield of abnormality are blood glucose, serum B12 with metabolites (methylmalonic acid with or without homocysteine) and serum protein immunofixation electrophoresis (Level C). If there is no definite evidence of diabetes mellitus by routine testing of blood glucose, testing for impaired glucose tolerance may be considered in distal symmetric sensory polyneuropathy (Level C). 2. Genetic testing is established as useful for the accurate diagnosis and classification of hereditary neuropathies (Level A). Genetic testing may be considered in patients with cryptogenic polyneuropathy who exhibit a hereditary neuropathy phenotype (Level C). Initial genetic testing should be guided by the clinical phenotype, inheritance pattern, and electrodiagnostic (EDX) features and should focus on the most common abnormalities which are CMT1A duplication/HNPP deletion, Cx32 (GJB1), and MFN2 mutation screening. There is insufficient evidence to determine the usefulness of routine genetic testing in patients with cryptogenic polyneuropathy who do not exhibit a hereditary neuropathy phenotype (Level U).


Asunto(s)
Técnicas de Laboratorio Clínico , Polineuropatías/diagnóstico , Polineuropatías/genética , Electroforesis de las Proteínas Sanguíneas , Análisis Mutacional de ADN , Medicina Basada en la Evidencia , Prueba de Tolerancia a la Glucosa , Humanos , Patrón de Herencia , Polineuropatías/sangre , Vitamina B 12/sangre
4.
PM R ; 1(1): 14-22, 2009 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-19627868

RESUMEN

BACKGROUND: Distal symmetric polyneuropathy (DSP) is the most common variety of neuropathy. Since the evaluation of this disorder is not standardized, the available literature was reviewed to provide evidence-based guidelines regarding the role of autonomic testing, nerve biopsy and skin biopsy for the assessment of polyneuropathy. METHODS: A literature review using MEDLINE, EMBASE, Science Citation Index and Current Contents was performed to identify the best evidence regarding the evaluation of polyneuropathy published between 1980 and March 2007. Articles were classified according to a four-tiered level of evidence scheme and recommendations were based upon the level of evidence. RESULTS AND CONCLUSIONS: 1. Autonomic testing may be considered in the evaluation of patients with polyneuropathy to document autonomic nervous system dysfunction (Level B). Such testing should be considered especially for the evaluation of suspected autonomic neuropathy (Level B) and distal small fiber sensory polyneuropathy (SFSN) (Level C). A battery of validated tests is recommended to achieve the highest diagnostic accuracy (Level B). 2. Nerve biopsy is generally accepted as useful in the evaluation of certain neuropathies as in patients with suspected amyloid neuropathy, mononeuropathy multiplex due to vasculitis, or with atypical forms of chronic inflammatory demyelinating polyneuropathy (CIDP). However, the literature is insufficient to provide a recommendation regarding when a nerve biopsy may be useful in the evaluation of DSP (Level U). 3. Skin biopsy is a validated technique for determining intraepidermal nerve fiber (IENF) density and may be considered for the diagnosis of DSP, particularly SFSN (Level C). There is a need for additional prospective studies to define more exact guidelines for the evaluation of polyneuropathy.


Asunto(s)
Sistema Nervioso Autónomo/patología , Polineuropatías/diagnóstico , Piel/patología , Sistema Nervioso Autónomo/fisiopatología , Biopsia , Medicina Basada en la Evidencia , Humanos , Examen Neurológico , Polineuropatías/etiología , Polineuropatías/patología , Piel/inervación
5.
Neurology ; 72(15): 1337-44, 2009 Apr 14.
Artículo en Inglés | MEDLINE | ID: mdl-19365055

RESUMEN

BACKGROUND: Chronic inflammatory demyelinating polyradiculoneuropathy trials have demonstrated the efficacy of IV immunoglobulin vs placebo. However, these trails have not addressed the long-term impact on health-related quality of life (HRQoL). METHODS: One hundred seventeen patients in a randomized, double-blind, response-conditional crossover trial received immune globulin IV, 10% caprylate/chromatography purified (IGIV-C [Gamunex(R)]), or placebo every 3 weeks for up to 24 weeks in the first period (FP). Participants whose inflammatory neuropathy cause and treatment disability score did not improve by >/=1 point received alternate treatment in a 24-week crossover period (CP). In either period, participants who improved and completed treatment were eligible to be randomly reassigned to a blinded 24-week extension phase (EP). HRQoL analyses were conducted using the Short Form-36(R) (SF-36) and the Rotterdam Handicap Scale (RHS). RESULTS: In the FP, greater improvements in both SF-36 physical and mental component scores were observed with IGIV-C vs placebo, with a significant improvement in the physical component score (difference 4.4 points; 95% confidence interval [CI] 0.7-8.0). Improvements in all SF-36 domains favored IGIV-C vs placebo, with physical functioning, role-physical, social functioning, and mental health reaching significance. Participants receiving IGIV-C experienced a larger improvement in RHS vs those receiving placebo (difference 3.4 points; 95% CI 1.4-5.5; p = 0.001). In the CP, similar general trends were observed. In the EP, mean SF-36 improvements were generally improved or maintained in participants who continued IGIV-C therapy; however, worsening was observed in participants re-randomized to placebo. CONCLUSIONS: Long-term therapy with immune globulin IV, 10% caprylate/chromatography purified, improves and maintains health-related quality of life in chronic inflammatory demyelinating polyradiculoneuropathy.


Asunto(s)
Inmunoglobulinas Intravenosas/uso terapéutico , Polirradiculoneuropatía Crónica Inflamatoria Desmielinizante/psicología , Polirradiculoneuropatía Crónica Inflamatoria Desmielinizante/terapia , Adolescente , Adulto , Estudios Cruzados , Método Doble Ciego , Humanos , Salud Mental , Calidad de Vida , Conducta Social , Adulto Joven
6.
Muscle Nerve ; 39(1): 116-25, 2009 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-19086068

RESUMEN

Distal symmetric polyneuropathy (DSP) is the most common variety of neuropathy. Since the evaluation of this disorder is not standardized, the available literature was reviewed to provide evidence-based guidelines regarding the role of laboratory and genetic tests for the assessment of DSP. A literature review using MEDLINE, EMBASE, Science Citation Index, and Current Contents was performed to identify the best evidence regarding the evaluation of polyneuropathy published between 1980 and March 2007. Articles were classified according to a four-tiered level of evidence scheme and recommendations were based on the level of evidence. (1) Screening laboratory tests may be considered for all patients with polyneuropathy (Level C). Those tests that provide the highest yield of abnormality are blood glucose, serum B(12) with metabolites (methylmalonic acid with or without homocysteine), and serum protein immunofixation electrophoresis (Level C). If there is no definite evidence of diabetes mellitus by routine testing of blood glucose, testing for impaired glucose tolerance may be considered in distal symmetric sensory polyneuropathy (Level C). (2) Genetic testing is established as useful for the accurate diagnosis and classification of hereditary neuropathies (Level A). Genetic testing may be considered in patients with cryptogenic polyneuropathy who exhibit a hereditary neuropathy phenotype (Level C). Initial genetic testing should be guided by the clinical phenotype, inheritance pattern, and electrodiagnostic (EDX) features and should focus on the most common abnormalities, which are CMT1A duplication/HNPP deletion, Cx32 (GJB1), and MFN2 mutation screening. There is insufficient evidence to determine the usefulness of routine genetic testing in patients with cryptogenic polyneuropathy who do not exhibit a hereditary neuropathy phenotype (Level U).


Asunto(s)
Técnicas de Laboratorio Clínico/métodos , Predisposición Genética a la Enfermedad/genética , Nervios Periféricos/fisiopatología , Polineuropatías/diagnóstico , Polineuropatías/genética , Algoritmos , Técnicas de Laboratorio Clínico/normas , Análisis Mutacional de ADN , Medicina Basada en la Evidencia , Pruebas Genéticas/métodos , Pruebas Genéticas/normas , Humanos , Patrón de Herencia/genética , Nervios Periféricos/metabolismo , Polineuropatías/fisiopatología , Valor Predictivo de las Pruebas
7.
Muscle Nerve ; 39(1): 106-15, 2009 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-19086069

RESUMEN

Distal symmetric polyneuropathy (DSP) is the most common variety of neuropathy. Since the evaluation of this disorder is not standardized, the available literature was reviewed to provide evidence-based guidelines regarding the role of autonomic testing, nerve biopsy, and skin biopsy for the assessment of polyneuropathy. A literature review using MEDLINE, EMBASE, Science Citation Index, and Current Contents was performed to identify the best evidence regarding the evaluation of polyneuropathy published between 1980 and March 2007. Articles were classified according to a four-tiered level of evidence scheme and recommendations were based on the level of evidence. (1) Autonomic testing may be considered in the evaluation of patients with polyneuropathy to document autonomic nervous system dysfunction (Level B). Such testing should be considered especially for the evaluation of suspected autonomic neuropathy (Level B) and distal small fiber sensory polyneuropathy (SFSN) (Level C). A battery of validated tests is recommended to achieve the highest diagnostic accuracy (Level B). (2) Nerve biopsy is generally accepted as useful in the evaluation of certain neuropathies as in patients with suspected amyloid neuropathy, mononeuropathy multiplex due to vasculitis, or with atypical forms of chronic inflammatory demyelinating polyneuropathy (CIDP). However, the literature is insufficient to provide a recommendation regarding when a nerve biopsy may be useful in the evaluation of DSP (Level U). (3) Skin biopsy is a validated technique for determining intraepidermal nerve fiber (IENF) density and may be considered for the diagnosis of DSP, particularly SFSN (Level C). There is a need for additional prospective studies to define more exact guidelines for the evaluation of polyneuropathy.


Asunto(s)
Enfermedades del Sistema Nervioso Autónomo/diagnóstico , Nervios Periféricos/patología , Polineuropatías/diagnóstico , Fibras Simpáticas Posganglionares/patología , Enfermedades del Sistema Nervioso Autónomo/fisiopatología , Axones/patología , Biopsia , Electrodiagnóstico , Medicina Basada en la Evidencia , Humanos , Conducción Nerviosa/fisiología , Nervios Periféricos/fisiopatología , Polineuropatías/fisiopatología , Valor Predictivo de las Pruebas , Células Receptoras Sensoriales/patología , Piel/inervación , Piel/patología , Fibras Simpáticas Posganglionares/fisiopatología
8.
Neurology ; 72(2): 185-92, 2009 Jan 13.
Artículo en Inglés | MEDLINE | ID: mdl-19056666

RESUMEN

BACKGROUND: Distal symmetric polyneuropathy (DSP) is the most common variety of neuropathy. Since the evaluation of this disorder is not standardized, the available literature was reviewed to provide evidence-based guidelines regarding the role of laboratory and genetic tests for the assessment of DSP. METHODS: A literature review using MEDLINE, EMBASE, and Current Contents was performed to identify the best evidence regarding the evaluation of polyneuropathy published between 1980 and March 2007. Articles were classified according to a four-tiered level of evidence scheme and recommendations were based upon the level of evidence. RESULTS AND RECOMMENDATIONS: 1) Screening laboratory tests may be considered for all patients with polyneuropathy (Level C). Those tests that provide the highest yield of abnormality are blood glucose, serum B12 with metabolites (methylmalonic acid with or without homocysteine), and serum protein immunofixation electrophoresis (Level C). If there is no definite evidence of diabetes mellitus by routine testing of blood glucose, testing for impaired glucose tolerance may be considered in distal symmetric sensory polyneuropathy (Level C). 2) Genetic testing should be conducted for the accurate diagnosis and classification of hereditary neuropathies (Level A). Genetic testing may be considered in patients with cryptogenic polyneuropathy who exhibit a hereditary neuropathy phenotype (Level C). Initial genetic testing should be guided by the clinical phenotype, inheritance pattern, and electrodiagnostic features and should focus on the most common abnormalities which are CMT1A duplication/HNPP deletion, Cx32 (GJB1), and MFN2 mutation screening. There is insufficient evidence to determine the usefulness of routine genetic testing in patients with cryptogenic polyneuropathy who do not exhibit a hereditary neuropathy phenotype (Level U).


Asunto(s)
Técnicas de Laboratorio Clínico/normas , Predisposición Genética a la Enfermedad/genética , Polineuropatías/diagnóstico , Polineuropatías/genética , Análisis Mutacional de ADN/normas , Neuropatías Diabéticas/diagnóstico , Neuropatías Diabéticas/metabolismo , Neuropatías Diabéticas/fisiopatología , Diagnóstico Diferencial , Pruebas Genéticas/normas , Prueba de Tolerancia a la Glucosa/normas , Humanos , Patrón de Herencia , Mutación/genética , Polineuropatías/fisiopatología
9.
Neurology ; 72(2): 177-84, 2009 Jan 13.
Artículo en Inglés | MEDLINE | ID: mdl-19056667

RESUMEN

BACKGROUND: Distal symmetric polyneuropathy (DSP) is the most common variety of neuropathy. Since the evaluation of this disorder is not standardized, the available literature was reviewed to provide evidence-based guidelines regarding the role of autonomic testing, nerve biopsy, and skin biopsy for the assessment of polyneuropathy. METHODS: A literature review using MEDLINE, EMBASE, and Current Contents was performed to identify the best evidence regarding the evaluation of polyneuropathy published between 1980 and March 2007. Articles were classified according to a four-tiered level of evidence scheme and recommendations were based upon the level of evidence. RESULTS AND RECOMMENDATIONS: 1) Autonomic testing should be considered in the evaluation of patients with polyneuropathy to document autonomic nervous system dysfunction (Level B). Such testing should be considered especially for the evaluation of suspected autonomic neuropathy (Level B) and distal small fiber sensory polyneuropathy (SFSN) (Level C). A battery of validated tests is recommended to achieve the highest diagnostic accuracy (Level B). 2) Nerve biopsy is generally accepted as useful in the evaluation of certain neuropathies as in patients with suspected amyloid neuropathy, mononeuropathy multiplex due to vasculitis, or with atypical forms of chronic inflammatory demyelinating polyneuropathy (CIDP). However, the literature is insufficient to provide a recommendation regarding when a nerve biopsy may be useful in the evaluation of DSP (Level U). 3) Skin biopsy is a validated technique for determining intraepidermal nerve fiber density and may be considered for the diagnosis of DSP, particularly SFSN (Level C). There is a need for additional prospective studies to define more exact guidelines for the evaluation of polyneuropathy.


Asunto(s)
Nervios Periféricos/patología , Polineuropatías/diagnóstico , Células Receptoras Sensoriales/patología , Enfermedades del Sistema Nervioso Autónomo/diagnóstico , Enfermedades del Sistema Nervioso Autónomo/etiología , Enfermedades del Sistema Nervioso Autónomo/fisiopatología , Vías Autónomas/patología , Vías Autónomas/fisiopatología , Biopsia/métodos , Biopsia/normas , Electrodiagnóstico/métodos , Electrodiagnóstico/normas , Medicina Basada en la Evidencia/métodos , Medicina Basada en la Evidencia/normas , Humanos , Examen Neurológico/métodos , Examen Neurológico/normas , Nervios Periféricos/fisiopatología , Polineuropatías/fisiopatología , Piel/inervación , Piel/fisiopatología
10.
Eur J Neurol ; 15(12): 1300-3, 2008 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-19049545

RESUMEN

BACKGROUND: Cerebellar syndrome and small fiber neuropathy may complicate celiac disease (CD) and may be resistant to a strict gluten-free diet. METHODS: Case series. RESULTS: We report three patients with biopsy-proven CD who developed cerebellar ataxia and neuropathic pain despite strict adherence to a gluten-free diet. A small fiber neuropathy was suggested by skin biopsy findings in two patients. All patients' symptoms, including small fiber neuropathy symptoms, responded to treatment with intravenous immunoglobulin (IVIG). Discontinuation of IVIG in two patients resulted in worsened ataxia that reversed after resumption of IVIG. CONCLUSION: Intravenous immunoglobulin may be effective in treating cerebellar ataxia and small fiber neuropathy associated with CD, suggesting an immune pathogenesis. Further prospective, controlled studies are necessary to determine the long-term response to IVIG or other immunomodulation therapy.


Asunto(s)
Enfermedad Celíaca/complicaciones , Ataxia Cerebelosa/tratamiento farmacológico , Ataxia Cerebelosa/inmunología , Inmunoglobulinas Intravenosas/administración & dosificación , Enfermedades del Sistema Nervioso Periférico/tratamiento farmacológico , Enfermedades del Sistema Nervioso Periférico/inmunología , Adulto , Vías Aferentes/efectos de los fármacos , Vías Aferentes/inmunología , Vías Aferentes/fisiopatología , Ataxia Cerebelosa/fisiopatología , Cerebelo/efectos de los fármacos , Cerebelo/inmunología , Cerebelo/fisiopatología , Progresión de la Enfermedad , Relación Dosis-Respuesta a Droga , Femenino , Humanos , Fibras Nerviosas Amielínicas/efectos de los fármacos , Fibras Nerviosas Amielínicas/inmunología , Fibras Nerviosas Amielínicas/patología , Nociceptores/efectos de los fármacos , Nociceptores/inmunología , Nociceptores/patología , Nervios Periféricos/efectos de los fármacos , Nervios Periféricos/inmunología , Nervios Periféricos/patología , Enfermedades del Sistema Nervioso Periférico/fisiopatología , Tractos Espinocerebelares/efectos de los fármacos , Tractos Espinocerebelares/inmunología , Tractos Espinocerebelares/fisiopatología , Resultado del Tratamiento
11.
J Neurol Neurosurg Psychiatry ; 78(8): 902-4, 2007 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-17353253

RESUMEN

Patients with anti-myelin associated glycoprotein (anti-MAG) neuropathy have uniform slowing without temporal dispersion, but do usually have disproportionately distal slowing. We evaluated distal compound muscle action potential (CMAP) dispersion in 29 patients with anti-MAG/sulphated glucuronyl paragloboside (SGPG) neuropathy (titres > or = 12,800). Among 138 motor responses, 15% (tibial), 7.3% (peroneal), 10.7% (median) and 13.8% (ulnar) had distal CMAP duration > 9 ms. Disproportionate distal slowing with normal distal CMAP duration in the arms may be useful to differentiate chronic inflammatory demyelinating polyneuropathy from anti-MAG/SGPG associated neuropathy.


Asunto(s)
Potenciales de Acción , Músculo Esquelético/fisiopatología , Glicoproteína Asociada a Mielina/inmunología , Polineuropatías/fisiopatología , Anticuerpos , Brazo/fisiología , Electrofisiología , Femenino , Globósidos/inmunología , Humanos , Masculino , Persona de Mediana Edad , Polineuropatías/inmunología , Estudios Retrospectivos
12.
Neurology ; 66(12): 1923-5, 2006 Jun 27.
Artículo en Inglés | MEDLINE | ID: mdl-16801661

RESUMEN

The authors report six patients with multifocal axonal polyneuropathy and the subsequent diagnosis of celiac disease (CD). Five patients did not improve or had only modest improvement following dietary intervention or immune therapies; one patient with marked weakness and mild electrodiagnostic findings had complete resolution of the neuropathy following immunomodulatory therapy. CD may be a cause of multifocal axonal polyneuropathy.


Asunto(s)
Enfermedad Celíaca/diagnóstico , Enfermedad Celíaca/terapia , Lesión Axonal Difusa/diagnóstico , Lesión Axonal Difusa/terapia , Enfermedades del Sistema Nervioso Periférico/diagnóstico , Enfermedades del Sistema Nervioso Periférico/terapia , Adulto , Enfermedad Celíaca/complicaciones , Lesión Axonal Difusa/etiología , Femenino , Humanos , Masculino , Persona de Mediana Edad , Enfermedades del Sistema Nervioso Periférico/etiología , Resultado del Tratamiento
13.
Neurol Neurophysiol Neurosci ; : 7, 2006 Dec 22.
Artículo en Inglés | MEDLINE | ID: mdl-17260084

RESUMEN

PURPOSE: To correlate the electrodiagnostic and clinical features of patients with demyelinating abnormalities and neuropathy of otherwise unknown etiology. METHODS: We examined the records of patient with demyelinating abnormalities and no other cause for neuropathy that were evaluated in our electrophysiology laboratory over the course of a year, to correlate the clinical and electrodiagnostic features. RESULTS: Eight percent of all patients had one or more demyelinating abnormalities. Demyelinating features were significantly more numerous in generalized or asymmetric neuropathy than in distal polyneuropathy. The peroneal nerve was the most commonly affected in all phenotypes, and none of the patients with distal neuropathy had F-wave prolongation in the demyelinating range. CONCLUSIONS: The number and type of demyelinating abnormalities in patients with polyneuropathy vary with the clinical phenotype. The clinical presentation should be considered in developing or evaluating electrodiagnostic criteria for demyelinating neuropathies.


Asunto(s)
Enfermedades Desmielinizantes/diagnóstico , Enfermedades Desmielinizantes/fisiopatología , Electrodiagnóstico/métodos , Nervios Periféricos/fisiopatología , Enfermedades del Sistema Nervioso Periférico/diagnóstico , Enfermedades del Sistema Nervioso Periférico/fisiopatología , Adulto , Anciano , Anciano de 80 o más Años , Brazo/inervación , Brazo/fisiopatología , Enfermedades Desmielinizantes/etiología , Diagnóstico Diferencial , Estimulación Eléctrica , Femenino , Lateralidad Funcional/fisiología , Humanos , Pierna/inervación , Pierna/fisiopatología , Masculino , Persona de Mediana Edad , Fibras Nerviosas Mielínicas/patología , Fibras Nerviosas Mielínicas/fisiología , Conducción Nerviosa/fisiología , Nervios Periféricos/patología , Enfermedades del Sistema Nervioso Periférico/etiología , Nervio Peroneo/patología , Nervio Peroneo/fisiopatología , Fenotipo , Valor Predictivo de las Pruebas , Reflejo/fisiología , Reproducibilidad de los Resultados
14.
Cell Mol Life Sci ; 62(7-8): 791-9, 2005 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-15868404

RESUMEN

The extra-intestinal manifestations of celiac disease (CD), including ataxia and peripheral neuropathy, are increasingly being recognized as the presenting symptoms of this autoimmune disease. Although there is a greater understanding of the pathogenesis of the intestinal lesions in CD the mechanisms behind the neurologic manifestations of CD have not been elucidated. In this article, the authors review the cellular and molecular mechanisms behind the histopathologic changes in the intestine, discuss the presentation and characteristics of neurologic manifestations of CD, review the data on the mechanisms behind these manifestations, and discuss the diagnosis and treatment of CD. Molecular mimicry and intermolecular help may play a role in the development of neurologic complications.


Asunto(s)
Enfermedades Autoinmunes/etiología , Enfermedad Celíaca/fisiopatología , Enfermedades del Sistema Nervioso/fisiopatología , Enfermedades Autoinmunes/inmunología , Enfermedad Celíaca/complicaciones , Enfermedad Celíaca/diagnóstico , Enfermedad Celíaca/inmunología , Glútenes/inmunología , Humanos , Intestinos/enzimología , Intestinos/inmunología , Intestinos/patología , Enfermedades del Sistema Nervioso/etiología , Enfermedades del Sistema Nervioso/inmunología , Linfocitos T/inmunología , Linfocitos T/patología , Transglutaminasas/metabolismo
15.
Brain ; 128(Pt 4): 867-79, 2005 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-15705608

RESUMEN

Peripheral neuropathy (PN) in inflammatory bowel disease (IBD) patients has been reported as individual cases or small series; however, its clinical and electrodiagnostic features have not been well characterized. We conducted a retrospective review of patients with PN and either Crohn's disease (CD) or ulcerative colitis (UC). Eighteen patients with CD and 15 patients with UC were identified after other PN causes were excluded. Male predominance and mean age of PN presentation in the fifties was seen in both groups. Demyelinating neuropathy (CIDP or MMN) occurred in close to 30% of the patients, in a higher percentage of women, than in the non-demyelinating patients. One-third of CD and UC patients had small-fibre or large-fibre sensory axonal PN, while approximately 40% of the CD and UC patients had large-fibre axonal sensorimotor PN. PN symptoms began earlier in the course of CD than in UC (P < 0.05). Patients with large-fibre axonal PN were older than patients with small-fibre sensory axonal PN (P < 0.05). Close to 60% of each group received immunotherapy with different agents. Half of those treated with CD and 40% with UC had demyelinating PN. Most of the patients who completed immunotherapy in both groups improved; all the patients with demyelinating neuropathy had either moderate or major improvement. The PN syndromes in IBD patients are diverse. Demyelinating forms may occur at any time, but early in the IBD course, pure sensory neuropathy is more common. Response to immunotherapy may occur in both demyelinating and axonal neuropathies.


Asunto(s)
Enfermedades Inflamatorias del Intestino/complicaciones , Enfermedades del Sistema Nervioso Periférico/etiología , Adulto , Factores de Edad , Anciano , Colitis Ulcerosa/complicaciones , Colitis Ulcerosa/terapia , Enfermedad de Crohn/complicaciones , Enfermedad de Crohn/terapia , Enfermedades Desmielinizantes/etiología , Enfermedades Desmielinizantes/terapia , Femenino , Humanos , Inmunoterapia , Enfermedades Inflamatorias del Intestino/terapia , Masculino , Persona de Mediana Edad , Fibras Musculares Esqueléticas/patología , Enfermedades del Sistema Nervioso Periférico/patología , Estudios Retrospectivos , Factores Sexuales , Resultado del Tratamiento
16.
Neurology ; 64(2): 199-207, 2005 Jan 25.
Artículo en Inglés | MEDLINE | ID: mdl-15668414

RESUMEN

The objective of this report was to develop a case definition of distal symmetric polyneuropathy to standardize and facilitate clinical research and epidemiologic studies. A formalized consensus process was employed to reach agreement after a systematic review and classification of evidence from the literature. The literature indicates that symptoms alone have relatively poor diagnostic accuracy in predicting the presence of polyneuropathy; signs are better predictors of polyneuropathy than symptoms; and single abnormalities on examination are less sensitive than multiple abnormalities in predicting the presence of polyneuropathy. The combination of neuropathic symptoms, signs, and electrodiagnostic findings provides the most accurate diagnosis of distal symmetric polyneuropathy. A set of case definitions was rank ordered by likelihood of disease. The highest likelihood of polyneuropathy (useful for clinical trials) occurs with a combination of multiple symptoms, multiple signs, and abnormal electrodiagnostic studies. A modest likelihood of polyneuropathy (useful for field or epidemiologic studies) occurs with a combination of multiple symptoms and multiple signs when the results of electrodiagnostic studies are not available. A lower likelihood of polyneuropathy occurs when electrodiagnostic studies and signs are discordant. For research purposes, the best approach to defining distal symmetric polyneuropathy is a set of case definitions rank ordered by estimated likelihood of disease. The inclusion of this formalized case definition in clinical and epidemiologic research studies will ensure greater consistency of case selection.


Asunto(s)
Técnicas de Diagnóstico Neurológico , Electrodiagnóstico , Polineuropatías/diagnóstico , Protocolos Clínicos , Ensayos Clínicos como Asunto , Neuropatías Diabéticas/clasificación , Neuropatías Diabéticas/diagnóstico , Diagnóstico Diferencial , Electromiografía , Medicina Basada en la Evidencia , Testimonio de Experto , Humanos , Conducción Nerviosa , Examen Neurológico , Polineuropatías/clasificación , Polineuropatías/epidemiología , Reflejo Anormal , Sensibilidad y Especificidad , Sociedades Médicas , Terminología como Asunto
17.
Muscle Nerve ; 31(1): 113-23, 2005 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-15536624

RESUMEN

The objective of this report was to develop a case definition of "distal symmetrical polyneuropathy" to standardize and facilitate clinical research and epidemiological studies. A formalized consensus process was employed to reach agreement after a systematic review and classification of evidence from the literature. The literature indicates that symptoms alone have relatively poor diagnostic accuracy in predicting the presence of polyneuropathy; signs are better predictors of polyneuropathy than symptoms; and single abnormalities on examination are less sensitive than multiple abnormalities in predicting the presence of polyneuropathy. The combination of neuropathic symptoms, signs, and electrodiagnostic findings provides the most accurate diagnosis of distal symmetrical polyneuropathy. A set of case definitions was rank ordered by likelihood of disease. The highest likelihood of polyneuropathy (useful for clinical trials) occurs with a combination of multiple symptoms, multiple signs, and abnormal electrodiagnostic studies. A modest likelihood of polyneuropathy (useful for field or epidemiological studies) occurs with a combination of multiple symptoms and multiple signs when the results of electrodiagnostic studies are not available. A lower likelihood of polyneuropathy occurs when electrodiagnostic studies and signs are discordant. For research purposes, the best approach for defining distal symmetrical polyneuropathy is a set of case definitions rank ordered by estimated likelihood of disease. The inclusion of this formalized case definition in clinical and epidemiological research studies will ensure greater consistency of case selection.


Asunto(s)
Electrodiagnóstico/normas , Enfermedades del Sistema Nervioso Periférico/diagnóstico , Polineuropatías/diagnóstico , Medicina Basada en la Evidencia , Humanos , Enfermedades del Sistema Nervioso Periférico/fisiopatología , Polineuropatías/fisiopatología , Guías de Práctica Clínica como Asunto
18.
Neurology ; 60(10): 1581-5, 2003 May 27.
Artículo en Inglés | MEDLINE | ID: mdl-12771245

RESUMEN

BACKGROUND: Celiac disease (CD) is a chronic inflammatory enteropathy resulting from sensitivity to ingested gluten. Neurologic complications are estimated to occur in 10% of affected patients, with ataxia and peripheral neuropathy being the most common problems. The incidence and clinical presentation of patients with CD-associated peripheral neuropathy have not previously been investigated. OBJECTIVE: To determine the incidence of CD in patients with neuropathy and to characterize the clinical presentation. METHODS: The records of 20 patients with neuropathy and biopsy-confirmed CD were reviewed. RESULTS: Six of the 20 patients had neuropathic symptoms alone without gastrointestinal involvement, and neuropathic symptoms preceded other CD symptoms in another 3 patients. All patients had burning, tingling, and numbness in their hands and feet, with distal sensory loss, and nine had diffuse paresthesias involving the face, trunk, or lumbosacral region. Only two had weakness. Results of electrophysiologic studies were normal or mildly abnormal in 18 (90%) of the patients. Sural nerve biopsies, obtained from three patients, revealed mild to severe axonopathy. Using the agglutination assay, 13 (65%) of the patients were positive for ganglioside antibodies. Excluding patients who were referred with the diagnosis of celiac neuropathy, CD was seen in approximately 2.5% of all neuropathy patients and in 8% of patients with neuropathy and normal electrophysiologic studies seen at our center. CONCLUSION: CD is commonly associated with sensory neuropathy and should be considered even in the absence of gastrointestinal symptoms.


Asunto(s)
Enfermedad Celíaca/complicaciones , Trastornos Neurológicos de la Marcha/etiología , Parestesia/etiología , Adulto , Anciano , Anciano de 80 o más Años , Especificidad de Anticuerpos , Biopsia , Enfermedad Celíaca/dietoterapia , Enfermedad Celíaca/inmunología , Femenino , Trastornos Neurológicos de la Marcha/inmunología , Gangliósidos/inmunología , Gliadina/inmunología , Glútenes/efectos adversos , Humanos , Inmunoglobulina A/inmunología , Masculino , Persona de Mediana Edad , Parestesia/inmunología , Estudios Retrospectivos , Nervio Sural/patología , Transglutaminasas/inmunología
19.
J Allergy Clin Immunol ; 108(4 Suppl): S126-32, 2001 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-11586280

RESUMEN

Intravenous gamma globulin (IVIg) is used in the treatment of immunologic diseases that affect the entire neuroaxis, including the brain, spinal cord, peripheral nerves, muscles, and neuromuscular junction. The panel reviewed the available literature on the use of IVIg in order to evaluate the efficacy of this therapy in neuroimmunologic diseases. In prospective, rigorously controlled, double-blinded clinical trials, IVIg was found to have proven efficacy in the Guillain-Barré syndrome, chronic inflammatory demyelinating polyneuropathy, multifocal motor neuropathy, dermatomyositis, and Lambert-Eaton myasthenic syndrome. It was found to be probably effective in myasthenia gravis and polymyositis, and possibly effective in several other neuroimmunologic diseases. Further studies are needed to evaluate the use of IVIg for neuroimmunologic diseases in which its efficacy is suspected but not proven and to elucidate its mechanisms of action.


Asunto(s)
Enfermedades del Sistema Inmune/terapia , Inmunoglobulinas Intravenosas/uso terapéutico , Enfermedades del Sistema Nervioso/terapia , Ensayos Clínicos como Asunto , Humanos
20.
Neurology ; 56(7): 855-60, 2001 Apr 10.
Artículo en Inglés | MEDLINE | ID: mdl-11294921

RESUMEN

OBJECTIVE: To develop a rapid assay for the detection and measurement of anti-GM(1) ganglioside antibodies in patients with neuropathy, using a surface plasmon resonance-based biosensor. BACKGROUND: Elevated levels of anti-GM(1) ganglioside antibodies are observed in patients with acute and chronic motor neuropathies. Assays for detecting anti-GM(1) antibodies in serum are increasingly being used to help the physician in the evaluation of these patients. METHODS: Antigens were immobilized by adsorption of GM(1) (active) and GM(2) (control) gangliosides onto a dextran-based sensor chip which is in contact with a flow cell carrying the sample. Interaction of specific antibodies directed against GM(1) with the ganglioside-coated sensor chip caused a change in refractive index at the surface of the chip, which was detected by an optical sensor, using the phenomenon of surface plasmon resonance. Sera from patients and healthy individuals were analyzed by the new assay and results were compared with those from ELISA. Anti-GM(1) antibody isotype was identified by using a secondary antibody. RESULTS: The binding of anti-GM(1) antibodies to the immobilized GM(1) was observed in real time after reference subtraction of the response from GM(2) control. The response was proportional to antibody concentration. The assay exhibited high specificity for sera from patients with multifocal motor neuropathy and Guillain-Barré syndrome with antibodies against GM(1). CONCLUSIONS: The surface plasmon resonance biosensor assay offers a rapid system for directly measuring antibody levels in serum without the use of any labels, while comparing favorably with the ELISA system in sensitivity and specificity.


Asunto(s)
Anticuerpos Antiidiotipos/sangre , Gangliósido G(M1)/sangre , Enfermedades del Sistema Nervioso/sangre , Resonancia por Plasmón de Superficie/métodos , Ensayo de Inmunoadsorción Enzimática , Humanos , Factores de Tiempo
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