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Determination of urine catecholamines and metanephrines by reversed-phase liquid chromatography-tandem mass spectrometry 被引量:6
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作者 CHEUK Man-Yung LO Yun-Chuen POON Wing-Tat 《色谱》 CAS CSCD 北大核心 2017年第10期1042-1047,共6页
The measurement of urine catecholamine and metanephrine concentrations is important for biochemical screening and diagnosis of pheochromocytoma.The goal of this work was to develop a simple liquid chromatography-tande... The measurement of urine catecholamine and metanephrine concentrations is important for biochemical screening and diagnosis of pheochromocytoma.The goal of this work was to develop a simple liquid chromatography-tandem mass spectrometry(LC-MS/MS)method for determining catecholamines and metanephrines in urine to replace an existing liquid chromatographic method using electrochemical detection.Urine samples were prepared using Oasis weak-cation-exchange cartridges.The eluate was analyzed on an Agilent ZORBAX Eclipse Plus Phenyl-Hexyl column in 3 min.Adrenaline,noradrenaline,dopamine,metanephrine,normetanephrine,and their deuterated internal standards were monitored in positive electrospray ionization mode by multiple reaction monitoring(MRM).No evidence of ion suppression was observed.The assay was linear up to 5μmol/L for adrenaline,5μmol/L for noradrenaline,6.1μmol/L for dopamine,5.6μmol/L for metanephrine,and 34.6μmol/L for normetanephrine,with lower limits of quantification of 5,5,12,6 and 7nmol/L,respectively.The intra-day and inter-day precisions for all analytes ranged from 0.59%to 4.64%and1.98%to 4.80%,respectively.External quality assurance samples were assayed and showed excellent agreement with the target values.This simple method provides an improved assay for determining urine catecholamines and metanephrines. 展开更多
关键词 liquid chromatography-tandem mass SPECTROMETRY (LC-MS/MS) metanephrines CATECHOLAMINES PHEOCHROMOCYTOMA URINE
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Pancreatic paraganglioma diagnosed by endoscopic ultrasoundguided fine needle aspiration: A case report and review of literature 被引量:4
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作者 Gandhi Lanke John M Stewart Jeffrey H Lee 《World Journal of Gastroenterology》 SCIE CAS 2021年第37期6322-6331,共10页
BACKGROUND Pancreatic paragangliomas(PPGL)are rare benign neuroendocrine neoplasms but malignancy can occur.PPGL are often misdiagnosed as pancreatic neuroendocrine tumor or pancreatic adenocarcinoma.CASE SUMMARY We r... BACKGROUND Pancreatic paragangliomas(PPGL)are rare benign neuroendocrine neoplasms but malignancy can occur.PPGL are often misdiagnosed as pancreatic neuroendocrine tumor or pancreatic adenocarcinoma.CASE SUMMARY We reviewed 47 case reports of PPGL published in PubMed to date.Fifteen patients(15/47)with PPGL underwent endoscopic ultrasound-guided fine needle aspiration(EUS-FNA).Only six(6/15)were correctly diagnosed as PPGL.All patients with PPGL underwent surgical resection except three(one patient surgery was aborted because of hypertensive crisis,two patients had metastasis or involvement of major vessels).Our patient remained on close surveillance as she was asymptomatic.CONCLUSION Accurate preoperative diagnosis of PPGL can be safely achieved by EUS-FNA with immunohistochemistry.Multidisciplinary team approach should be considered to bring the optimal results in the management of PPGL. 展开更多
关键词 Pancreatic paraganglioma Endoscopic ultrasound-guided fine needle aspiration Meta-iodobenzylguanidine scan metanephrines GATA-3 IMMUNOHISTOCHEMISTRY Case report
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Another Undiagnosed Pheochromocytoma Causes Hypertensive Crisis in the Operating Room—What about a Rapid Blood Metanephrine Test?
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作者 Carrie Rosenberg Ricardo Gomez 《Open Journal of Anesthesiology》 2013年第2期93-96,共4页
Undiagnosed pheochromocytoma is a cause of hypertension intraoperatively. Hypertension from pheochromocytoma catecholamine secretion is potentially fatal and requires immediate treatment with cardiac afterload reducti... Undiagnosed pheochromocytoma is a cause of hypertension intraoperatively. Hypertension from pheochromocytoma catecholamine secretion is potentially fatal and requires immediate treatment with cardiac afterload reduction and preload augmentation for end-organ protection. Diagnosis and management in the acute period can be complex in the context of co-existing disease, other possible causes of hypertension, and the anesthetized patient who is unable to provide historical clues. This case report highlights the plausibility that pheochromocytomas may be more likely to present sub-clinically in elderly patients with severe vascular disease, so we suggest the potential utility of studying whether reduced vascular responsiveness is protective in any way to catecholamine load. Above all, as an increasing number of case reports of pheochromocytoma discovery intra-operatively emerge, many with catastrophic outcomes, the development value and feasibility of a rapid, on-site blood metanephrine test should be considered. Existing diagnostic methods of pheochromocytoma are relatively time-consuming and not useful in the acute situation. 展开更多
关键词 PHEOCHROMOCYTOMA metanephrines CATECHOLAMINES PERIOPERATIVE Hypertension
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Adrenomedullary Function in Cohort of Brazilian Pediatric Patients with Classic Congenital Adrenal Hyperplasia
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作者 Talita Soriano Cruz Hovland Izabel Calland Ricarte Beserra 《Journal of Endocrinology Research》 2020年第1期20-25,共6页
Congenital Adrenal Hyperplasia is a group of autosomal recessive disorders resulting from deficiency of enzymes essential for the synthesis of cortisol.Disease of the adrenal cortex,but there may be involvement adreno... Congenital Adrenal Hyperplasia is a group of autosomal recessive disorders resulting from deficiency of enzymes essential for the synthesis of cortisol.Disease of the adrenal cortex,but there may be involvement adrenomedullary.Cortisol and epinephrine are directly related to the individual’s stress response.Lower values of epinephrine in children with congenital adrenal hyperplasia could be related to increased clinical complications and hospitalizations rate.We evaluated the serum values of metanephrines and normetanephrines in children and adolescents with classic congenital adrenal hyperplasia and primary hypothyroidism and possible correlations with disease and hospitalizations.Cross-sectional study involved 29 patients(10 simple virilizing and 19 salt-wasting),and control group of 28 patients with primary hypothyroidism(10 overt and 18 subclinical).There were no differences in age(p=0.24)and metanephrine(p=0.34)or normetanephrine values(p=0.85)between groups.Hospitalization rate was higher in the cases than in the controls(51 x 12).We conclude the serum values of metanephrine and normetanephrine in patients with congenital adrenal hyperplasia were within the normal values of reference,with no significant difference of group with primary hypothiroidism.The number of hospitalizations in the case was high in relation to the control,mainly in salt-wasting. 展开更多
关键词 Classical congenital adrenal hyperplasia Adrenal medulla NORMETANEPHRINE Metanephrine HOSPITALIZATION
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人血浆中3-甲氧基肾上腺素和3-甲氧基去甲肾上腺素的萃取和浓度检测方法研究
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作者 彭婷 范燕华 《生物化工》 2021年第6期86-89,94,共5页
目的:建立固相萃取-高效液相-电化学检测器联用法测定人血浆中3-甲氧基肾上腺素(Metanephrine,MN)和3-甲氧基去甲肾上腺素(Normetanephrine,NMN)浓度的方法。方法:采用固相萃取弱阳离子交换小柱萃取人血浆中的MN和NMN,用HPLC-ECD测定其... 目的:建立固相萃取-高效液相-电化学检测器联用法测定人血浆中3-甲氧基肾上腺素(Metanephrine,MN)和3-甲氧基去甲肾上腺素(Normetanephrine,NMN)浓度的方法。方法:采用固相萃取弱阳离子交换小柱萃取人血浆中的MN和NMN,用HPLC-ECD测定其浓度,并对其方法专属性、回收率进行研究。结果:MN线性相关系数R^(2)=0.9972,NMN线性相关系数R^(2)=0.9996;MN的提取回收率和方法回收率为84.34%和99.10%,NMN的提取回收率和方法回收率为90.55%和100.48%。结论:本课题建立的固相萃取-高效液相色谱-电化学检测器联用检测法检测人血浆中MN和NMN的浓度,操作简单,提取率较高,为临床人血浆中MN和NMN浓度检测提供方法学参考。 展开更多
关键词 3-甲氧基肾上腺素(Metanephrine MN) 3-甲氧基去甲肾上腺素(Normetanephrine NMN) 高效液相色谱法 电化学检测器
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