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1.
Clin Endocrinol (Oxf) ; 94(1): 12-23, 2021 01.
Artículo en Inglés | MEDLINE | ID: mdl-32702779

RESUMEN

BACKGROUND: Ganglioneuromas are very rare tumours of the sympathetic nervous system. Clinical and pathological knowledge is currently based on largely incomparable registries and case series that focus on paediatric or adrenal cases. To comprehensively characterize the full clinical spectrum across ages and locations, a meta-analysis was performed where amenable and complemented by systematic literature review of individual patient data (IPD). DESIGN: Articles containing "ganglioneuroma" in English on humans, published from 1/1/1995-6/27/2018, were identified from PubMed. Aggregate data from 10 eligible patient series on 19 variables were considerably inhomogeneous, restricting meta-analysis to age and gender distribution. To determine basic disease characteristics across ages and locations, IPD were retrieved from case reports and small case series (PROSPERO CRD42018010247). RESULTS: Individual patient data representing 364 cases revealed that 65.7% (60.6%-70.4%) were diagnosed in adults, more frequently in females (62%, 56.9%-66.9%). 24.5% (20.3%-39.1%) were discovered incidentally. Most often, ganglioneuromas developed in abdomen/pelvis (66.2, 32.1% adrenal). With age, the proportion of ganglioneuroma localizations with high post-surgical complication rate (35.6% head/neck and 16.3% thorax) decreased. Contrarily, the diagnosis of adrenal ganglioneuromas (<1% post-surgical complications) increased with age. Hormone production, hypertension or coincidence with another non-neuroblastic neural-crest-derived tumour component was more common for adrenal location. Recurrence and metastatic spread have not been reported for ganglioneuromas without secondary tumour component. CONCLUSIONS: This work summarizes characteristics of the currently largest number of international GN patients across all ages. The data confirm a benign nature of GN, independent of age. Age-related differences in predominant tumour location, associated post-surgical complications and hormone production suggest case-centred management strategies.


Asunto(s)
Neoplasias de las Glándulas Suprarrenales , Ganglioneuroma , Neoplasias Primarias Secundarias , Adulto , Niño , Femenino , Humanos , Recurrencia Local de Neoplasia , Sistema de Registros
2.
Clin Endocrinol (Oxf) ; 85(1): 62-9, 2016 07.
Artículo en Inglés | MEDLINE | ID: mdl-26998836

RESUMEN

OBJECTIVE: Pharmacological treatment is mandatory in patients with hormonally functional phaeochromocytoma and paraganglioma (PHAEO/PGL). We evaluated if patients initially diagnosed with hormonally functional PHAEO/PGL by various medical subspecialties received proper adrenoceptor blockade, and analysed factors predicting the prescription of adequate treatment. METHODS: In a retrospective cohort study, we reviewed data from patients initially diagnosed with hormonally functional PHAEO/PGL outside the National Institutes of Health and Cedars-Sinai Medical Center, who were referred to these institutions between January 2001 and April 2015. Logistic regression was used to assess factors associated with proper adrenoceptor blockade. RESULTS: A total of 381 patients were included. Adequate pharmacological treatment was prescribed to 69·3%, of which 93·1% received α-adrenoceptor blockers. Regarding patients who were inappropriately treated, 53% did not receive any medication. Independent predictors of the prescription of a proper blockade were the diagnosis by endocrinologists [odds ratio (OR) 4·14; 95% confidence interval (CI), 2·51-6·85; P < 0·001], the presence of high blood pressure (OR 5·94; 95% CI, 3·11-11·33; P < 0·001) and the evidence of metastasis (OR 5·96; 95% CI, 1·93-18·46; P = 0·002). CONCLUSIONS: Although most patients received adequate pharmacological treatment, almost one-third were either not treated or received inappropriate medications. The diagnosis by endocrinologists, the presence of high blood pressure and the evidence of metastatic disease were identified as independent predictors of a proper blockade. These results highlight the need to educate physicians about the importance of starting adequate adrenoceptor blockade in all patients with hormonally functional PHAEO/PGL.


Asunto(s)
Neoplasias de las Glándulas Suprarrenales/tratamiento farmacológico , Antagonistas Adrenérgicos/uso terapéutico , Paraganglioma/tratamiento farmacológico , Feocromocitoma/tratamiento farmacológico , Guías de Práctica Clínica como Asunto/normas , Adulto , Antihipertensivos/uso terapéutico , Estudios de Cohortes , Femenino , Humanos , Hipertensión , Masculino , Persona de Mediana Edad , Metástasis de la Neoplasia , Receptores Adrenérgicos , Estudios Retrospectivos , Estados Unidos , Adulto Joven
3.
J Vasc Interv Radiol ; 27(9): 1342-1349, 2016 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-27461586

RESUMEN

PURPOSE: To compare cone-beam computed tomography (CT) navigation vs conventional CT image guidance during biopsies. MATERIALS AND METHODS: Patients scheduled for image-guided biopsies were prospectively and randomly assigned to conventional CT guidance vs cone-beam CT navigation. Radiation dose, accuracy of final needle position, rate of histopathologic diagnosis, and number of needle repositions to reach the target (defined as pullback to adjust position) were compared. RESULTS: A total of 58 patients (mean age, 57 y; 62.1% men) were randomized: 29 patients underwent 33 biopsies with CT guidance and 29 patients with 33 lesions underwent biopsy with cone-beam CT navigation. The average body mass index (BMI) was similar between groups, at 28.8 kg/m(2) ± 6.55 (P = .18). There was no difference between groups in terms of patient and lesion characteristics (eg, size, depth). The average lesion size was 29.1 ± 12.7mm for CT group vs 32.1mm ±16.8mm for cone-beam CT group (P < 0.59). Location of lesions was equally divided between the 2 groups, 20 lung lesions, 18 renal lesions and 20 other abdominal lesions. Mean number of needle repositions in the cone-beam CT group was 0.3 ± 0.5, compared with 1.9 ± 2.3 with conventional CT (P < .001). The average skin entry dose was 29% lower with cone-beam CT than with conventional CT (P < .04 accounting for BMI). The average estimated effective dose for the planning scan from phantom data was 49% lower with cone-beam CT vs conventional CT (P = .018). Accuracy, defined as the difference between planned and final needle positions, was 4.9 mm ± 4.1 for the cone-beam CT group, compared with 12.2 mm ± 8.1 for conventional CT (P < .001). Histopathologic diagnosis rates were similar between groups, at 90.9% for conventional CT and 93.9% for cone-beam CT (P = .67). CONCLUSIONS: Cone-beam CT navigation for biopsies improved targeting accuracy with fewer needle repositions, lower skin entry dose, and lower effective dose for planning scan, and a comparable histopathologic diagnosis rate.


Asunto(s)
Biopsia con Aguja/métodos , Tomografía Computarizada de Haz Cónico , Biopsia Guiada por Imagen/métodos , Neoplasias/patología , Radiografía Intervencional/métodos , Tomografía Computarizada por Rayos X , Adulto , Anciano , Biopsia con Aguja/efectos adversos , Biopsia con Aguja/instrumentación , Tomografía Computarizada de Haz Cónico/efectos adversos , Femenino , Humanos , Biopsia Guiada por Imagen/efectos adversos , Biopsia Guiada por Imagen/instrumentación , Masculino , Persona de Mediana Edad , Agujas , Neoplasias/diagnóstico por imagen , Valor Predictivo de las Pruebas , Estudios Prospectivos , Dosis de Radiación , Exposición a la Radiación/efectos adversos , Exposición a la Radiación/prevención & control , Radiografía Intervencional/efectos adversos , Tomografía Computarizada por Rayos X/efectos adversos
4.
Ann Rheum Dis ; 74(9): 1714-9, 2015 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-24906637

RESUMEN

OBJECTIVE: To study efficacy and safety of escalating doses of canakinumab, a fully human anti-IL-1ß monoclonal antibody in the severe cryopyrin-associated periodic syndrome, neonatal-onset multisystem inflammatory disease (NOMID). METHODS: 6 patients were enrolled in this 24-month, open-label phase I/II study. All underwent anakinra withdrawal. The initial subcutaneous canakinumab dose was 150 mg (or 2 mg/kg in patients ≤40 kg) or 300 mg (or 4 mg/kg) with escalation up to 600 mg (or 8 mg/kg) every 4 weeks. Full remission was remission of patient-reported clinical components and measures of systemic inflammation and CNS inflammation. Hearing, vision and safety were assessed. Primary endpoint was full remission at month 6. RESULTS: All patients flared after anakinra withdrawal, and symptoms and serum inflammatory markers improved with canakinumab. All patients required dose escalation to the maximum dose. At month 6, none had full remission, although 4/6 achieved inflammatory remission, based on disease activity diary scores and normal C-reactive proteins. None had CNS remission; 5/6 due to persistent CNS leucocytosis. At the last study visit, 5/6 patients achieved inflammatory remission and 4/6 had continued CNS leucocytosis. Visual acuity and field were stable in all patients, progressive hearing loss occurred in 1/10 ears. Adverse events (AEs) were rare. One serious AE (abscess due to a methicillin-resistant Staphylococcus aureus infection) occurred. CONCLUSIONS: Canakinumab at the studied doses improves symptoms and serum inflammatory features of NOMID, although low-grade CNS leukocytosis in four patients and headaches in one additional patient persisted. Whether further dose intensifications are beneficial in these cases remains to be assessed. CLINICALTRIALSGOV IDENTIFIER: NCT00770601.


Asunto(s)
Anticuerpos Monoclonales/administración & dosificación , Síndromes Periódicos Asociados a Criopirina/tratamiento farmacológico , Interleucina-1beta/antagonistas & inhibidores , Adolescente , Adulto , Anticuerpos Monoclonales/uso terapéutico , Anticuerpos Monoclonales Humanizados , Proteína C-Reactiva/metabolismo , Líquido Cefalorraquídeo/citología , Niño , Síndromes Periódicos Asociados a Criopirina/complicaciones , Síndromes Periódicos Asociados a Criopirina/metabolismo , Femenino , Cefalea/tratamiento farmacológico , Cefalea/etiología , Humanos , Recuento de Leucocitos , Masculino , Inducción de Remisión , Resultado del Tratamiento , Adulto Joven
5.
Palliat Support Care ; 13(5): 1165-83, 2015 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-25273677

RESUMEN

OBJECTIVE: Clinical practice aims to respect patient autonomy by basing treatment decisions for incapacitated patients on their own preferences. Yet many patients do not complete an advance directive, and those who do frequently just designate a family member to make decisions for them. This finding raises the concern that clinical practice may be based on a mistaken understanding of patient priorities. The present study aimed to collect systematic data on how patients prioritize the goals of treatment decision making. METHOD: We employed a self-administered, quantitative survey of patients in a tertiary care center. RESULTS: Some 80% or more of the 1169 respondents (response rate = 59.8%) ranked six of eight listed goals for treatment decision making as important. When asked which goal was most important, 38.8% identified obtaining desired or avoiding unwanted treatments, 20.0% identified minimizing stress or financial burden on their family, and 14.6% identified having their family help to make treatment decisions. No single goal was designated as most important by 25.0% of participants. SIGNIFICANCE OF RESULTS: Patients endorsed three primary goals with respect to decision making during periods of incapacity: being treated consistent with their own preferences; minimizing the burden on their family; and involving their family in the decision-making process. However, no single goal was prioritized by a clear majority of patients. These findings suggest that advance care planning should not be limited to documenting patients' treatment preferences. Clinicians should also discuss and document patients' priorities for how decisions are to be made. Moreover, future research should evaluate ways to modify current practice to promote all three of patients primary goals for treatment decision making.


Asunto(s)
Planificación Anticipada de Atención/normas , Toma de Decisiones , Relaciones Familiares , Prioridad del Paciente , Apoderado , Adulto , Anciano , District of Columbia , Composición Familiar , Femenino , Humanos , Masculino , Persona de Mediana Edad , Encuestas y Cuestionarios
6.
Eur J Clin Invest ; 44(4): 365-71, 2014 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-24467715

RESUMEN

BACKGROUND: Measurement of plasma/urinary catecholamine metabolites--especially normetanephrine (NMN)--represents a gold standard in biochemical detection of succinate dehydrogenase subunit B (SDHB) and D (SDHD)-related pheochromocytomas (PHEO) and paragangliomas (PGL). This study was designed to assess diagnostic utility of chromogranin A (CgA) alone or in combination with NMN in patients with PHEO/PGL related to mutations in SDHB and SDHD. MATERIALS AND METHODS: A retrospective study of SDHB and SDHD NIH patients' cohort, which included 41 patients with SDHB mutation-related PHEO/sPGL and 18 patients with either SDHD or SDHB mutation-related head and neck PGL (HNPGL) with both CgA and NMN measured at the time of diagnosis at NIH. RESULTS: In the SDHB group, CgA showed sensitivity of 73.2% and specificity of 95.9%, while for NMN they were 70.7% and 98.6%, respectively. Elevations in CgA and NMN were complementary in 92.7% of patients with proven tumors. Both tests performed well on receiver operating characteristic curve analysis. CgA levels were elevated in 76.9% of SDHB patients and in 80% of patients with metastatic disease and normal NMN levels. CgA values in patients with HNPGL were significantly lower than in patients with PHEO/sPGL. CONCLUSION: CgA is a valuable complementary biomarker in work-up of SDHB-related PHEO/sPGL. In combination with plasma NMN, CgA further enhances tumor detection by 22.0% with minimal loss in specificity. Although non-specific for PHEO/PGL, CgA may well supplement plasma NMN to facilitate diagnostic evaluation of SDHB-related PHEO/sPGL, especially where the measurement of plasma metanephrines could otherwise be delayed by decreased availability or cost restriction.


Asunto(s)
Cromogranina A/metabolismo , Neoplasias de Cabeza y Cuello/diagnóstico , Paraganglioma/diagnóstico , Adulto , Anciano , Biomarcadores/metabolismo , Niño , Preescolar , Neoplasias de Cabeza y Cuello/genética , Humanos , Persona de Mediana Edad , Mutación/genética , Normetanefrina/metabolismo , Paraganglioma/genética , Curva ROC , Estudios Retrospectivos , Sensibilidad y Especificidad , Succinato Deshidrogenasa/genética , Succinato Deshidrogenasa/metabolismo , Adulto Joven
7.
BMC Cancer ; 14: 523, 2014 Jul 21.
Artículo en Inglés | MEDLINE | ID: mdl-25048685

RESUMEN

BACKGROUND: Succinate dehydrogenase subunit B (SDHB) mutations are associated with aggressive pheochromocytoma (PHEO)/paraganglioma (PGL) behavior, often resulting in metastatic disease and fatal outcomes. These tumors are often larger, extra-adrenal, and contain lower catecholamine concentrations than other hereditary PHEOs/PGLs. This study evaluated the size and age at diagnosis of primary SDHB-related PHEOs/PGLs as independent predictors of their metastatic behavior and outcome (survival). METHODS: One hundred six patients with SDHB mutation-related PHEO/PGL were included in this retrospective study. The recorded largest diameters, locations, and patient ages at initial diagnosis of SDHB-related primary tumors were analyzed in the context of time to metastasis and patient survival. RESULTS: First, the development of metastatic disease in patients with primary tumors ≥4.5 cm was significantly earlier than in patients with smaller tumors (P = 0.003). Second, patients with primary tumors larger than 5.5 cm also had worse overall survival than patients with smaller tumors (P = 0.008). Third, age at initial diagnosis was found to be an independent predictor of patient survival (PHEOs: P = 0.041; PGLs: P < 0.001). Fourth, we did not observe a significant difference in survival based on the specific SDHB mutations or patient sex. CONCLUSION: Receiver operating characteristic curves established 4.5 cm as the best value to dichotomize the primary SDHB-related PHEO/PGL in order to evaluate the development of metastatic disease and 5.5 cm as the best value for survival prediction. Subsequently, the size of the primary tumor was found as an age-independent predictor of patient survival and metastases development in PGL. In both PHEO and PGL, age at diagnosis was found to be a size-independent predictor of patient survival. No significant difference was found in metastases development or patient survival between males and females or among specific SDHB mutations. This data further extends and supports previous recommendations that carriers with SDHB mutations must undergo early and regular evaluations to detect PHEO/PGL in order to achieve the best clinical outcome.


Asunto(s)
Neoplasias de las Glándulas Suprarrenales/patología , Metástasis de la Neoplasia/patología , Paraganglioma/patología , Feocromocitoma/patología , Succinato Deshidrogenasa/genética , Neoplasias de las Glándulas Suprarrenales/diagnóstico , Neoplasias de las Glándulas Suprarrenales/genética , Adulto , Factores de Edad , Detección Precoz del Cáncer , Femenino , Humanos , Masculino , Metástasis de la Neoplasia/genética , Paraganglioma/diagnóstico , Paraganglioma/genética , Feocromocitoma/diagnóstico , Feocromocitoma/genética , Estudios Retrospectivos , Factores de Riesgo , Análisis de Supervivencia , Adulto Joven
8.
Arthritis Rheum ; 64(7): 2375-86, 2012 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-22294344

RESUMEN

OBJECTIVE: Blocking interleukin-1 with anakinra in patients with the autoinflammatory syndrome neonatal-onset multisystem inflammatory disease (NOMID) reduces systemic and organ-specific inflammation. However, the impact of long-term treatment has not been established. This study was undertaken to evaluate the long-term effect of anakinra on clinical and laboratory outcomes and safety in patients with NOMID. METHODS: We conducted a cohort study of 26 NOMID patients ages 0.80-42.17 years who were followed up at the NIH and treated with anakinra 1-5 mg/kg/day for at least 36 months. Disease activity was assessed using daily diaries, questionnaires, and C-reactive protein level. Central nervous system (CNS) inflammation, hearing, vision, and safety were evaluated. RESULTS: Sustained improvements in diary scores, parent's/patient's and physician's global scores of disease activity, parent's/patient's pain scores, and inflammatory markers were observed (all P<0.001 at 36 and 60 months). At 36 and 60 months, CNS inflammation was suppressed, with decreased cerebrospinal fluid white blood cell counts (P=0.0026 and P=0.0076, respectively), albumin levels, and opening pressures (P=0.0012 and P<0.001, respectively). Most patients showed stable or improved hearing. Cochlear enhancement on magnetic resonance imaging correlated with continued hearing loss. Visual acuity and peripheral vision were stable. Low optic nerve size correlated with poor visual field. Bony lesions progressed. Adverse events other than viral infections were rare, and all patients continued to receive the medication. CONCLUSION: These findings indicate that anakinra provides sustained efficacy in the treatment of NOMID for up to 5 years, with the requirement of dose escalation. Damage progression in the CNS, ear, and eye, but not bone, is preventable. Anakinra is well tolerated overall.


Asunto(s)
Antirreumáticos/uso terapéutico , Síndromes Periódicos Asociados a Criopirina/tratamiento farmacológico , Progresión de la Enfermedad , Proteína Antagonista del Receptor de Interleucina 1/uso terapéutico , Adolescente , Adulto , Antirreumáticos/administración & dosificación , Proteína C-Reactiva , Niño , Preescolar , Síndromes Periódicos Asociados a Criopirina/patología , Femenino , Humanos , Lactante , Recién Nacido , Inflamación/tratamiento farmacológico , Inflamación/patología , Proteína Antagonista del Receptor de Interleucina 1/administración & dosificación , Masculino , Encuestas y Cuestionarios , Resultado del Tratamiento
9.
J Vasc Interv Radiol ; 23(7): 953-961.e2, 2012 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-22609287

RESUMEN

PURPOSE: Prosthetic arteriovenous or arterial-arterial bypass grafts can thrombose and be resistant to revascularization. A thrombosed bypass graft model was created to evaluate the potential therapeutic enhancement and safety profile of pulsed high-intensity-focused ultrasound (pHIFU) on pharmaceutical thrombolysis. MATERIALS AND METHODS: In swine, a right carotid-carotid expanded polytetrafluoroethylene bypass graft was surgically constructed, containing a 40% stenosis at its distal end to induce graft thrombosis. The revascularization procedure was performed 7 days after surgery. After model development and dose response experiments (n = 11), two cohorts were studied: pHIFU with tissue plasminogen activator (TPA; n = 4) and sham pHIFU with TPA (n = 3). The experiments were identical in both groups except no energy was delivered in the sham pHIFU group. Serial angiograms were obtained in all cases. The area of graft opacified by contrast medium on angiograms was quantified with digital image processing software. A blinded reviewer calculated the change in the graft area opacified by contrast medium and expressed it as a percentage, representing percentage of thrombolysis. RESULTS: Combining pHIFU with 0.5 mg of TPA resulted in a 52% ± 4% increase in thrombolysis on angiograms obtained at 30 minutes, compared with a 9% ± 14% increase with sham pHIFU and 0.5 mg TPA (P = .003). Histopathologic examination demonstrated no differences between the groups. CONCLUSIONS: Thrombolysis of occluded bypass grafts was significantly increased when combining pHIFU and TPA versus sham pHIFU and TPA. These results suggest that application of pHIFU may augment thrombolysis with a reduced time and dose.


Asunto(s)
Trombosis/etiología , Trombosis/terapia , Injerto Vascular/efectos adversos , Animales , Terapia Combinada , Ultrasonido Enfocado de Alta Intensidad de Ablación , Porcinos , Terapia Trombolítica , Activador de Tejido Plasminógeno , Resultado del Tratamiento
10.
AJOB Empir Bioeth ; 13(3): 137-151, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-34596487

RESUMEN

BACKGROUND: Many patients have three primary goals for how treatment decisions are made for them in the event of decisional incapacity. They want to be treated consistent with their preferences and values, they want their family to be involved in making decisions, and they want to minimize the stress on their family. The present paper investigates how patients' beliefs about surrogate decision-making influence which of these three goals they prioritize. Methods: Quantitative survey of 1,169 U.S. patients to assess their beliefs about surrogate decision-making, and how these beliefs influence patients' priorities for surrogate decision-making. Results: Most patients believed that families in general (68.8%) and their own family in particular (83.4%) frequently, almost always, or always know which treatments the patient would want in the event of incapacity. Patients with these beliefs were more likely to prioritize the goal of involving their family in treatment decision-making over the goal of minimizing family stress. Most patients (77.4%) also believed their family would experience significant stress from helping to make treatment decisions. However, patients' priorities were largely unchanged by this belief. Conclusions: Prior reports suggest that patients overestimate the extent to which their family knows which treatments they want in the event of decisional incapacity. The present analysis adds that these patients might be more likely to prioritize the goal of involving their family in treatment decision-making, even when this results in the family experiencing significant distress. This finding highlights that patients' misinformed beliefs about their family's knowledge might influence patients' priorities for surrogate decision-making, raising important questions for clinical practice, policy, and future research.Supplemental data for this article is available online at https://doi.org/10.1080/23294515.2021.1983665.


Asunto(s)
Toma de Decisiones , Humanos , Encuestas y Cuestionarios
12.
Front Endocrinol (Lausanne) ; 12: 589451, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-33776908

RESUMEN

Paragangliomas and pheochromocytomas (PPGLs) are chromaffin tumors associated with severe catecholamine-induced morbidities. Surgical removal is often curative. However, complete resection may not be an option for patients with succinate dehydrogenase subunit A-D (SDHx) mutations. SDHx mutations are associated with a high risk for multiple recurrent, and metastatic PPGLs. Treatment options in these cases are limited and prognosis is dismal once metastases are present. Identification of new therapeutic targets and candidate drugs is thus urgently needed. Previously, we showed elevated expression of succinate receptor 1 (SUCNR1) in SDHB PPGLs and SDHD head and neck paragangliomas. Its ligand succinate has been reported to accumulate due to SDHx mutations. We thus hypothesize that autocrine stimulation of SUCNR1 plays a role in the pathogenesis of SDHx mutation-derived PPGLs. We confirmed elevated SUCNR1 expression in SDHx PPGLs and after SDHB knockout in progenitor cells derived from a human pheochromocytoma (hPheo1). Succinate significantly increased viability of SUCNR1-transfected PC12 and ERK pathway signaling compared to control cells. Candidate SUCNR1 inhibitors successfully reversed proliferative effects of succinate. Our data reveal an unrecognized oncometabolic function of succinate in SDHx PPGLs, providing a growth advantage via SUCNR1.


Asunto(s)
Paraganglioma/metabolismo , Feocromocitoma/metabolismo , Receptores Acoplados a Proteínas G/metabolismo , Succinato Deshidrogenasa/deficiencia , Ácido Succínico/metabolismo , Animales , Humanos , Ratones , Mutación , Paraganglioma/tratamiento farmacológico , Paraganglioma/enzimología , Paraganglioma/genética , Feocromocitoma/tratamiento farmacológico , Feocromocitoma/enzimología , Feocromocitoma/genética , Subunidades de Proteína/genética , Subunidades de Proteína/metabolismo , Ratas , Receptores Acoplados a Proteínas G/antagonistas & inhibidores , Receptores Acoplados a Proteínas G/genética , Succinato Deshidrogenasa/genética
13.
Cell Tissue Res ; 340(3): 607-12, 2010 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-20440513

RESUMEN

Progress in high throughput "-omic" techniques now allows the simultaneous measurement of expression levels of thousands of genes and promises the improved understanding of the molecular biology of diseases such as cancer. Detection of the dysfunction of molecular pathways in diseases requires healthy control tissue. This is difficult to obtain from pheochromocytomas (PHEOs), rare chromaffin tumors derived from adrenal medulla. The two options for obtaining adrenal tissue are: (1) whole organ removal post-mortem or during radical nephrectomy; (2) removal during PHEO surgery. Access to high quality normal adrenal tissue is limited. Removal of whole adrenals during nephrectomy is rare, because of improved surgical techniques. For adrenals removed post-mortem, the lag time to proper organ perfusion causes uncontrolled tissue degradation. Adjacent normal adrenal tissue can almost never be obtained from resected PHEOs, because they often replace the entire medulla or are well-encapsulated. If a margin of normal adrenal is attached to a resected PHEO, it seldom contains any medulla. The clean separation of medulla and cortex is further complicated, because their border is convoluted, and because adult adrenal consists of approximately 90% cortex. Thus, the quality of separation has to be evaluated with specific medullary and cortical markers. We describe the successful dissection of highly pure, medullary tissue from adrenals snap-frozen upon resection during radical nephrectomy or after brain death. Separation quality has been verified by quantitative reverse transcription with polymerase chain reaction for the medullary enzymes, tyrosine hydroxylase, and chromogranin A, and for the cortical enzyme, steroidogenic acute regulator.


Asunto(s)
Médula Suprarrenal/enzimología , Cromogranina A/metabolismo , Fosfoproteínas/metabolismo , Técnicas de Cultivo de Tejidos/métodos , Tirosina 3-Monooxigenasa/metabolismo , Corteza Suprarrenal/patología , Médula Suprarrenal/patología , Anciano , Biomarcadores/metabolismo , Cromogranina A/genética , Femenino , Humanos , Masculino , Persona de Mediana Edad , Fosfoproteínas/genética , ARN Mensajero/genética , ARN Mensajero/metabolismo
14.
Blood ; 112(5): 2092-100, 2008 Sep 01.
Artículo en Inglés | MEDLINE | ID: mdl-18523146

RESUMEN

A reliable estimate of peripheral blood stem cell (PBSC) mobilization response to granulocyte colony-stimulating factor (G-CSF) may identify donors at risk for poor mobilization and help optimize transplantation approaches. We studied 639 allogeneic PBSC collections performed in 412 white, 75 black, 116 Hispanic, and 36 Asian/Pacific adult donors who were prescribed G-CSF dosed at either 10 or 16 microg/kg per day for 5 days followed by large-volume leukapheresis (LVL). Additional LVL (mean, 11 L) to collect lymphocytes for donor lymphocyte infusion (DLI) and other therapies was performed before G-CSF administration in 299 of these donors. Day 5 preapheresis blood CD34(+) cell counts after mobilization were significantly lower in whites compared with blacks, Hispanics, and Asian/Pacific donors (79 vs 104, 94, and 101 cells/microL, P < .001). In addition, donors who underwent lymphapheresis before mobilization had higher CD34(+) cell counts than donors who did not (94 vs 79 cells/microL, P < .001). In multivariate analysis, higher post-G-CSF CD34(+) cell counts were most strongly associated with the total amount of G-CSF received, followed by the pre-G-CSF platelet count, pre-G-CSF mononuclear count, and performance of prior LVL for DLI collection. Age, white ethnicity, and female gender were associated with significantly lower post-G-CSF CD34(+) cell counts.


Asunto(s)
Movilización de Célula Madre Hematopoyética/métodos , Trasplante de Células Madre de Sangre Periférica , Donantes de Tejidos , Adulto , Antígenos CD34/sangre , Recuento de Células Sanguíneas , Eliminación de Componentes Sanguíneos/métodos , Etnicidad , Femenino , Factor Estimulante de Colonias de Granulocitos/administración & dosificación , Humanos , Leucaféresis , Masculino , Persona de Mediana Edad , Proteínas Recombinantes , Trasplante Homólogo
15.
Clin Endocrinol (Oxf) ; 72(5): 709-15, 2010 May.
Artículo en Inglés | MEDLINE | ID: mdl-20447070

RESUMEN

CONTEXT: The substitution of liothyronine (L-T3) for levothyroxine (L-T4) is commonly employed during thyroid hormone (TH) withdrawal in preparation for diagnostic and therapeutic interventions on thyroid cancer patients. Presently, only limited data are available on the L-T3 for L-T4 therapeutic substitution. Objective To characterize the pharmcodynamic equivalence of L-T3 and L-T4. DESIGN: Randomized, double-blind, cross-over intervention study. SETTING: NIH clinical center. PATIENTS: Ten thyroidectomized patients. INTERVENTIONS: Study participants were treated with L-T3 or L-T4 with a target TSH >or= 0.5

Asunto(s)
Terapia de Reemplazo de Hormonas , Hipotiroidismo/tratamiento farmacológico , Tiroxina/uso terapéutico , Triyodotironina/uso terapéutico , Área Bajo la Curva , Estudios Cruzados , Método Doble Ciego , Femenino , Humanos , Hipotiroidismo/sangre , Hipotiroidismo/cirugía , Masculino , Tasa de Depuración Metabólica , Persona de Mediana Edad , Equivalencia Terapéutica , Pruebas de Función de la Tiroides , Tiroidectomía , Tirotropina/sangre , Tiroxina/farmacocinética , Resultado del Tratamiento , Triyodotironina/farmacocinética
16.
Ann Intern Med ; 150(1): 27-32, 2009 Jan 06.
Artículo en Inglés | MEDLINE | ID: mdl-19124817

RESUMEN

BACKGROUND: Contrast-enhanced computed tomography (CT) is useful for localizing pheochromocytoma. However, in patients with suspected pheochromocytoma, CT is often canceled or not performed because of the strong belief that intravenous contrast may induce hypertensive crisis. OBJECTIVE: To examine whether intravenous low-osmolar contrast administration during CT induces catecholamine release that increases blood pressure or heart rate. DESIGN: Prospective study. SETTING: Warren G. Magnuson Clinical Center, National Institutes of Health, Bethesda, Maryland. PARTICIPANTS: 22 patients with pheochromocytoma (15 nonadrenal and 7 adrenal) and 8 unmatched control participants without pheochromocytoma. MEASUREMENTS: Plasma catecholamine levels, blood pressure, and heart rate. RESULTS: Plasma catecholamine levels within and between groups did not significantly differ before and after intravenous administration of low-osmolar CT contrast. Patients with pheochromocytoma experienced a clinically and statistically significant increase in diastolic blood pressure that was not accompanied by corresponding increases in plasma catecholamine levels. The difference became non-statistically significant after adjustment for use of alpha- and beta-blockers. LIMITATION: The study lacked a placebo group, and the sample was relatively small. CONCLUSION: Intravenous low-osmolar contrast-enhanced CT can safely be used in patients with pheochromocytoma who are not receiving alpha- or beta-blockers. FUNDING: Eunice Kennedy Shriver National Institute of Child Health and Development, National Institutes of Health.


Asunto(s)
Catecolaminas/sangre , Medios de Contraste/efectos adversos , Hipertensión/inducido químicamente , Feocromocitoma/sangre , Feocromocitoma/diagnóstico por imagen , Tomografía Computarizada por Rayos X/efectos adversos , Neoplasias de las Glándulas Suprarrenales/sangre , Neoplasias de las Glándulas Suprarrenales/diagnóstico por imagen , Adulto , Presión Sanguínea/efectos de los fármacos , Medios de Contraste/administración & dosificación , Femenino , Frecuencia Cardíaca/efectos de los fármacos , Humanos , Inyecciones Intravenosas , Masculino , Persona de Mediana Edad , Concentración Osmolar , Estudios Prospectivos , Tomografía Computarizada por Rayos X/métodos , Adulto Joven
17.
Ann Intern Med ; 151(4): 229-40, W49-51, 2009 Aug 18.
Artículo en Inglés | MEDLINE | ID: mdl-19687490

RESUMEN

BACKGROUND: Extracts of the medicinal plant Tripterygium wilfordii Hook F (TwHF) have been used in China for centuries to treat a spectrum of inflammatory diseases. OBJECTIVE: To compare the benefits and side effects of TwHF extract with those of sulfasalazine for the treatment of active rheumatoid arthritis. DESIGN: Randomized, controlled trial. A computer-generated code with random, permuted blocks was used to assign treatment. SETTING: 2 U.S. academic centers (National Institutes of Health, Bethesda, Maryland, and University of Texas, Dallas, Texas) and 9 rheumatology subspecialty clinics (in Dallas and Austin, Texas; Tampa and Fort Lauderdale, Florida; Arlington, Virginia; Duncanville, Pennsylvania; Wheaton and Greenbelt, Maryland; and Lansing, Michigan). PATIENTS: 121 patients with active rheumatoid arthritis and 6 or more painful and swollen joints. INTERVENTION: TwHF extract, 60 mg 3 times daily, or sulfasalazine, 1 g twice daily. Patients could continue stable doses of oral prednisone or nonsteroidal anti-inflammatory drugs but had to stop taking disease-modifying antirheumatic drugs at least 28 days before randomization. MEASUREMENTS: The primary outcome was the rate of achievement of 20% improvement in the American College of Rheumatology criteria (ACR 20) at 24 weeks. Secondary end points were safety; radiographic scores of joint damage; and serum levels of interleukin-6, cholesterol, cortisol, and adrenocorticotropic hormone. RESULTS: Outcome data were available for only 62 patients at 24 weeks. In a mixed-model analysis that imputed data for patients who dropped out, 65.0% (95% CI, 51.6% to 76.9%) of the TwHF group and 32.8% (CI, 21.3% to 46.0%) of the sulfasalazine group met the ACR 20 response criteria (P=0.001). Patients receiving TwHF also had significantly higher response rates for ACR 50 and ACR 70 in mixed-model analyses. Analyses of only completers showed similar significant differences between the treatment groups. Significant improvement was demonstrated in all individual components of the ACR response, including the Health Assessment Questionnaire disability score. Interleukin-6 levels rapidly and significantly decreased in the TwHF group. Although not statistically significant, radiographic progression was lower in the TwHF group. The frequency of adverse events was similar in both groups. LIMITATIONS: Only 62% and 41% of patients continued receiving TwHF extract and sulfasalazine, respectively, during the 24 weeks of the study. Long-term outcome data were not collected on participants who discontinued treatment. CONCLUSION: In patients who continued treatment for 24 weeks and could also use stable oral prednisone and nonsteroidal anti-inflammatory drugs, attainment of the ACR 20 response criteria was significantly greater with TwHF extract than with sulfasalazine.


Asunto(s)
Antirreumáticos/uso terapéutico , Artritis Reumatoide/tratamiento farmacológico , Fitoterapia , Extractos Vegetales/uso terapéutico , Sulfasalazina/uso terapéutico , Tripterygium , Adulto , Anciano , Antiinflamatorios no Esteroideos/uso terapéutico , Antirreumáticos/efectos adversos , Quimioterapia Combinada , Femenino , Enfermedades Gastrointestinales/inducido químicamente , Humanos , Masculino , Persona de Mediana Edad , Cooperación del Paciente , Fitoterapia/efectos adversos , Extractos Vegetales/efectos adversos , Prednisona/uso terapéutico , Sulfasalazina/efectos adversos
18.
Clin Imaging ; 59(1): 84-87, 2020 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-31760282

RESUMEN

The present case illustrates cardiac magnetic resonance imaging (MRI) and three-dimensional (3D) printed anatomic model findings of a coronary-cameral fistula (CCF) and double-chambered right ventricle (DCRV). A pregnant woman presented with palpitations and near syncope. A non-contrast cardiac MRI showed CCF connecting to a DCRV. Post-delivery, the patient had a contrast-enhanced MRI and 3D printed anatomic model to better evaluate her aberrant anatomy.


Asunto(s)
Enfermedad de la Arteria Coronaria/patología , Cardiopatías Congénitas/patología , Ventrículos Cardíacos/anomalías , Impresión Tridimensional , Fístula Vascular/patología , Adulto , Enfermedad de la Arteria Coronaria/complicaciones , Femenino , Cardiopatías Congénitas/complicaciones , Humanos , Angiografía por Resonancia Magnética/métodos , Modelos Anatómicos , Fístula Vascular/complicaciones
19.
J Cancer Res Clin Oncol ; 146(4): 1051-1063, 2020 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-32062700

RESUMEN

PURPOSE: Pheochromocytomas/paragangliomas (PHEOs/PGLs) are rare in children with only a few SDHB mutation-related cases. Previous studies on children were conducted in small cohorts. This large set of pediatric patients provides robust data in the evaluation of clinical outcomes. METHODS: Sixty-four pediatric PHEO/PGL patients with SDHB germline mutations were included in the present study. The clinical presentation, disease course, and survival rate were evaluated. RESULTS: Thirty-eight males and 26 females were diagnosed with PHEO/PGL at a median age of 13 years. The majority of patients displayed norepinephrine hypersecretion and 73.44% initially presented with a solitary tumor. Metastases developed in 70% of patients at the median age of 16 years and were mostly diagnosed first 2 years and in years 12-18 post-diagnosis. The presence of metastases at the time of diagnosis had a strong negative impact on survival in males but not in females. The estimated 5-, 10-, and 20-year survival rates were 100%, 97.14%, and 77.71%, respectively. CONCLUSION: The present report has highlighted several important aspects in the management of pediatric patients with SDHB mutations associated-PHEO/PGL. Initial diagnostic evaluation of SDHB mutation carriers should be started at age of 5-6 years with initial work-up focusing on abdominal region. Thorough follow-up is crucial first 2 years post-diagnosis and more frequent follow-ups are needed in years 10-20 post-diagnosis due to the increased risk of metastases. Although this age group developed metastasis as early as 5 years from diagnosis, we have shown that the overall 20-year prognosis and survival are good.


Asunto(s)
Neoplasias de las Glándulas Suprarrenales/genética , Paraganglioma/genética , Feocromocitoma/genética , Succinato Deshidrogenasa/genética , Adolescente , Neoplasias de las Glándulas Suprarrenales/enzimología , Neoplasias de las Glándulas Suprarrenales/patología , Adulto , Niño , Preescolar , Femenino , Mutación de Línea Germinal , Humanos , Estimación de Kaplan-Meier , Masculino , Estadificación de Neoplasias , Paraganglioma/enzimología , Paraganglioma/patología , Feocromocitoma/enzimología , Feocromocitoma/patología , Pronóstico , Adulto Joven
20.
N Engl J Med ; 355(6): 581-92, 2006 Aug 10.
Artículo en Inglés | MEDLINE | ID: mdl-16899778

RESUMEN

BACKGROUND: Neonatal-onset multisystem inflammatory disease is characterized by fever, urticarial rash, aseptic meningitis, deforming arthropathy, hearing loss, and mental retardation. Many patients have mutations in the cold-induced autoinflammatory syndrome 1 (CIAS1) gene, encoding cryopyrin, a protein that regulates inflammation. METHODS: We selected 18 patients with neonatal-onset multisystem inflammatory disease (12 with identifiable CIAS1 mutations) to receive anakinra, an interleukin-1-receptor antagonist (1 to 2 mg per kilogram of body weight per day subcutaneously). In 11 patients, anakinra was withdrawn at three months until a flare occurred. The primary end points included changes in scores in a daily diary of symptoms, serum levels of amyloid A and C-reactive protein, and the erythrocyte sedimentation rate from baseline to month 3 and from month 3 until a disease flare. RESULTS: All 18 patients had a rapid response to anakinra, with disappearance of rash. Diary scores improved (P<0.001) and serum amyloid A (from a median of 174 mg to 8 mg per liter), C-reactive protein (from a median of 5.29 mg to 0.34 mg per deciliter), and the erythrocyte sedimentation rate decreased at month 3 (all P<0.001), and remained low at month 6. Magnetic resonance imaging showed improvement in cochlear and leptomeningeal lesions as compared with baseline. Withdrawal of anakinra uniformly resulted in relapse within days; retreatment led to rapid improvement. There were no drug-related serious adverse events. CONCLUSIONS: Daily injections of anakinra markedly improved clinical and laboratory manifestations in patients with neonatal-onset multisystem inflammatory disease, with or without CIAS1 mutations. (ClinicalTrials.gov number, NCT00069329 [ClinicalTrials.gov].).


Asunto(s)
Inflamación/tratamiento farmacológico , Receptores de Interleucina-1/antagonistas & inhibidores , Sialoglicoproteínas/uso terapéutico , Urticaria/tratamiento farmacológico , Adolescente , Adulto , Proteínas Portadoras/genética , Niño , Preescolar , Femenino , Pérdida Auditiva/tratamiento farmacológico , Humanos , Inflamación/genética , Discapacidad Intelectual , Proteína Antagonista del Receptor de Interleucina 1 , Masculino , Meningitis/tratamiento farmacológico , Mutación , Proteína con Dominio Pirina 3 de la Familia NLR , Papiledema/tratamiento farmacológico , Sialoglicoproteínas/efectos adversos , Síndrome
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