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Pheochromocytoma

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https://www.readbyqxmd.com/read/28728228/-composite-pheochromocytoma-in-adrenal-gland-report-of-a-case
#1
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July 8, 2017: Zhonghua Bing Li Xue za Zhi Chinese Journal of Pathology
https://www.readbyqxmd.com/read/28724929/risk-factors-for-prolonged-hypotension-in-patients-with-pheochromocytoma-undergoing-laparoscopic-adrenalectomy-a-single-center-retrospective-study
#2
Shubin Wu, Weiyun Chen, Le Shen, Li Xu, Afang Zhu, Yuguang Huang
Prolonged hypotension during pheochromocytoma resection is a significant complication. We sought to investigate the predictors of prolonged hypotension in patients with pheochromocytoma undergoing laparoscopic adrenalectomy (LA). Patients with pheochromocytoma who underwent LA between 2012 and 2015 were surveyed. Patients were considered to have prolonged hypotension if they had a mean arterial blood pressure <60 mmHg or required ≥30 consecutive minutes of catecholamine support intraoperatively. Among 123 patients, 54 (43...
July 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28721348/systematic-genetic-screening-in-a-prospective-group-of-danish-patients-with-pheochromocytoma
#3
Morten Steen Svarer Hansen, Niels Jacobsen, Anja Lisbeth Frederiksen, Lars Lund, Marianne Skovsager Andersen, Dorte Glintborg
Recent guidelines recommend consideration of genetic screening in all newly diagnosed patients with pheochromocytoma. Patients diagnosed with pheochromocytoma in the Region of Southern Denmark during 2006-2013 without previously recognized monogenetic etiology were offered genetic screening for mutations in the VHL, RET, SDHB, SDHC, and SDHD genes. A total of 41 patients were included, and genetic data were available in 35. In four of the 35 patients, a pathogenic variant was identified prior to the diagnosis of pheochromocytoma (von Hippel-Lindau disease, n=2; neurofibromatosis type 1, n=2)...
2017: Research and Reports in Urology
https://www.readbyqxmd.com/read/28720665/targeted-exome-sequencing-of-krebs-cycle-genes-reveals-candidate-cancer-predisposing-mutations-in-pheochromocytomas-and-paragangliomas
#4
Laura Remacha, Iñaki Comino-Méndez, Susan Richter, Laura Contreras, Maria Currás-Freixes, Guillermo Pita, Rocío Letón, Antonio Galarreta, Rafael Torres-Pérez, Emiliano Honrado, Scherezade Jiménez, Lorena Maestre, Sebastian Moran, Manel Esteller, Jorgina Satrústegui, Graeme Eisenhofer, Mercedes Robledo, Alberto Cascon
Purpose: Mutations in Krebs cycle genes are frequently found in patients with pheochromocytomas/paragangliomas. Disruption of SDH, FH or MDH2 enzymatic activities lead to accumulation of specific metabolites, which give rise to epigenetic changes in the genome that cause a characteristic hypermethylated phenotype. Tumors showing this phenotype, but no alterations in the known predisposing genes, could harbor mutations in other Krebs cycle genes. <p>Experimental Design: We used downregulation and methylation of RBP1, as a marker of a hypermethylation phenotype, to select eleven pheochromocytomas and paragangliomas for targeted exome sequencing of a panel of Krebs cycle-related genes...
July 18, 2017: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/28715066/comparison-of-phenoxybenzamine-and-doxazosin-in-perioperative-management-of-patients-with-pheochromocytoma
#5
Klaudia Malec, Piotr Miśkiewicz, Agnieszka Witkowska, Ewa Krajewska, Sadegh Toutounchi, Zbigniew Gałązka, Mariusz Piotrowski, Agata Kącka, Tomasz Bednarczuk, Urszula Ambroziak
BACKGROUND: adrenalectomy with preoperative pharmacological preparation is strongly recommended in patients diagnosed with pheochromocytoma in order to prevent perioperative complications. AIM: to compare phenoxybenzamine and doxazosin in terms of perioperative hemodynamic status in patients with pheochromocytoma prepared to adrenalectomy. METHODS: retrospective analysis of 44 patients with pheochromocytoma (aged 16-80 yr, female-29) who underwent adrenalectomy...
July 17, 2017: Kardiologia Polska
https://www.readbyqxmd.com/read/28707773/sudden-onset-of-pheochromocytoma-multisystem-crisis-at-38%C3%A2-weeks-of-gestation-resulted-in-intrauterine-fetal-death-a-case-report
#6
Jun Iwase, Michiko Yamanaka
A 24-year-old woman at 38 weeks of gestation with no past medical history was transferred to our hospital because of acute onset of severe dyspnea. Her conscious level was E4V2M5 on the Glasgow Coma Scale and she displayed stress cardiomyopathy (Takotsubo cardiomyopathy) with multiple organ failure. Intrauterine fetal death was confirmed. After immediate application of intubated ventilation, percutaneous cardiopulmonary support and hemodialysis, she was diagnosed with pheochromocytoma multisystem crisis. After multidisciplinary team discussion, surgical resection of the left pheochromocytoma was performed on the same day...
July 14, 2017: Journal of Obstetrics and Gynaecology Research
https://www.readbyqxmd.com/read/28705916/biodistribution-and-dosimetry-of-18-f-meta-fluorobenzyl-guanidine-mfbg-a-first-in-human-pet-ct-imaging-study-of-patients-with-neuroendocrine-malignancies
#7
Neeta Pandit-Taskar, Pat B Zanzonico, Kevin D Staton, Jorge A Carrasquillo, Diane Reidy-Lagunes, Serge K Lyashchenko, Eva Burnazi, Hanwen Zhang, Jason S Lewis, Ronald Blasberg, Steven M Larson, Wolfgang Andreas Weber, Shakeel Modak
Introduction: Iodine-123-meta-iodobenzylguanidine ((123)I-MIBG) imaging is currently a mainstay in the evaluation of many neuroendocrine tumors, especially neuroblastoma. (123)I-MIBG imaging has several limitations that can be overcome by the use of a PET agent. (18)F-MFBG is a positron emission tomography (PET) analog of MIBG that may allow for single-day, high-resolution quantitative imaging. We conducted a first-in-human study of (18)F-MFBG PET imaging to evaluate the safety, feasibility, pharmacokinetics, and dosimetry of (18)F-MFBG in neuroendocrine tumors (NETs)...
July 13, 2017: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/28704339/quantitative-analysis-of-normal-and-pathologic-adrenal-glands-with-18f-fdopa-pet-ct-focus-on-pheochromocytomas
#8
Aurélie Moreau, Anne L Giraudet, David Kryza, Françoise Borson-Chazot, Claire Bournaud, Thomas Mognetti, Jean-Christophe Lifante, Patrick Combemale, Francesco Giammarile, Claire Houzard
INTRODUCTION: Many studies have reported the high performance of 6-fluorine-18-fluorodihydroxyphenilalanine (F-FDOPA) PET/CT in the diagnosis of pheochromocytomas but nobody seems to have investigated physiological and pathological adrenal glands from a quantitative point of view. The purpose of the present study was to assess the quantitative F-FDOPA uptake of normal and pathologic adrenal glands and to establish thresholds to characterize pheochromocytomas. We were especially interested in characterizing the remaining adrenal glands captation after an adrenalectomy...
July 12, 2017: Nuclear Medicine Communications
https://www.readbyqxmd.com/read/28704098/accuracy-of-plasma-free-metanephrines-in-the-diagnosis-of-pheochromocytoma-and-paraganglioma-a-systematic-review-and-meta-analysis
#9
Yan Chen, Huangmeng Xiao, Xieda Zhou, Xiaoyu Huang, Yanbing Li, Haipeng Xiao, Xiaopei Cao
OBJECTIVE: Various studies have validated plasma free metanephrines as biomarkers for pheochromocytoma and paraganglioma (PPGL). This meta-analysis aimed to estimate the overall diagnostic accuracy of this biochemical test for PPGL. METHODS: We searched the PubMed, the Cochrane Library, Web of Science, Embase, Scopus, OvidSP, and ProQuest Dissertations & Theses databases from January 1, 1995 to December 2, 2016 and selected studies written in English that assessed plasma free metanephrines in the diagnosis of PPGL...
July 13, 2017: Endocrine Practice
https://www.readbyqxmd.com/read/28704094/takotsubo-like-cardiomyopathy-in-a-large-cohort-of-patients-with-pheochromocytoma-and-paraganglioma
#10
Nadia Gagnon, Samer Mansour, Yoel Bitton, Isabelle Bourdeau
Pheochromocytoma (PHEO) and paraganglioma (PGL) (PPGL) may cause acute Takotsubo-like catecholamine cardiomyopathy (TLC). OBJECTIVE: To determine the prevalence and clinical presentation of TLC in a large cohort of patients with PPGL. METHODS: We reviewed retrospectively the records of consecutive patients with PPGL investigated in our center from 1995 to 2016. We collected clinical and paraclinical data of patients that had TLC in this cohort. We performed a literature review of cases of TTC-related to PPGL described previously from 1990-2015...
July 13, 2017: Endocrine Practice
https://www.readbyqxmd.com/read/28702269/marker-negative-pheochromocytoma-associated-with-inferior-vena-cava-thrombosis
#11
S Poudyal, M Pradhan, S Chapagain, B R Luitel, P R Chalise, U K Sharma, P R Gyawali
Pheochromocytoma associated with inferior vena cava (IVC) thrombosis is very rare. A 27-year-old female presented with right flank pain and hypertensive urgency. Contrast-enhanced CT abdomen and gadolinium-contrast MRI abdomen revealed right adrenal mass suspicious of malignancy with invasion and compression to the right IVC wall along with IVC thrombus extending from the level of renal veins to the level of confluence with hepatic veins. Her routine laboratory investigations including 24-hour urine fractionated metanephrines, vanillylmandelic acid, and cortisol were normal...
2017: Case Reports in Urology
https://www.readbyqxmd.com/read/28702111/innate-function-of-house-dust-mite-allergens-robust-enzymatic-degradation-of-extracellular-matrix-at-elevated-ph
#12
Kumiko Oida, Lukas Einhorn, Ina Herrmann, Lucia Panakova, Yvonne Resch, Susanne Vrtala, Gerlinde Hofstetter, Akane Tanaka, Hiroshi Matsuda, Erika Jensen-Jarolim
BACKGROUND: Exposure to the house dust mite Dermatophagoides pteronyssinus (D.p.) increases the risk for developing allergic diseases in humans and their best friends, the dogs. Here, we explored whether this allergenic mite via its enzymes may impact the cutaneous extracellular matrix (ECM), which critically determines epithelial barrier integrity both structurally and functionally. METHODS: Two extracts obtained from either dust-purified or cultured D.p. bodies were used in the present study...
2017: World Allergy Organization Journal
https://www.readbyqxmd.com/read/28698968/inhibition-of-poly-adp-ribose-polymerase-1-enhances-gene-expression-of-selected-sirtuins-and-app-cleaving-enzymes-in-amyloid-beta-cytotoxicity
#13
Przemysław L Wencel, Walter J Lukiw, Joanna B Strosznajder, Robert Piotr Strosznajder
Poly(ADP-ribose) polymerases (PARPs) and sirtuins (SIRTs) are involved in the regulation of cell metabolism, transcription, and DNA repair. Alterations of these enzymes may play a crucial role in Alzheimer's disease (AD). Our previous results indicated that amyloid beta (Aβ) peptides and inflammation led to activation of PARP1 and cell death. This study focused on a role of PARP1 in the regulation of gene expression for SIRTs and beta-amyloid precursor protein (βAPP) cleaving enzymes under Aβ42 oligomers (AβO) toxicity in pheochromocytoma cells (PC12) in culture...
July 12, 2017: Molecular Neurobiology
https://www.readbyqxmd.com/read/28698189/a-comprehensive-review-on-men-2b
#14
Frederic Castinetti, Jeff Moley, Lois M Mulligan, Steven G Waguespack
MEN2B is a very rare autosomal dominant hereditary tumor syndrome associated with medullary thyroid carcinoma (MTC) in 100% cases, pheochromocytoma in 50% cases, and multiple extra-endocrine features, many of which can be quite disabling. Only few data are available in the literature. The aim of this review is to try to give further insights into the natural history of the disease and to point out the missing evidence that would help clinicians optimize the management of such patients. MEN2B is mainly characterized by the early occurrence of MTC, which led the American Thyroid Association to recommend preventive thyroidectomy before the age of 1...
July 11, 2017: Endocrine-related Cancer
https://www.readbyqxmd.com/read/28694771/nupr1-modulates-methamphetamine-induced-dopaminergic-neuronal-apoptosis-and-autophagy-through-chop-trib3-mediated-endoplasmic-reticulum-stress-signaling-pathway
#15
Xiang Xu, Enping Huang, Yunchun Tai, Xu Zhao, Xuebing Chen, Chuanxiang Chen, Rui Chen, Chao Liu, Zhoumeng Lin, Huijun Wang, Wei-Bing Xie
Methamphetamine (METH) is an illegal and widely abused psychoactive stimulant. METH exposure causes detrimental effects on multiple organ systems, primarily the nervous system, especially dopaminergic pathways, in both laboratory animals and humans. In this study, we hypothesized that Nuclear protein 1 (Nupr1/com1/p8) is involved in METH-induced neuronal apoptosis and autophagy through endoplasmic reticulum (ER) stress signaling pathway. To test this hypothesis, we measured the expression levels of Nupr1, ER stress protein markers CHOP and Trib3, apoptosis-related protein markers cleaved-caspase3 and PARP, as well as autophagy-related protein markers LC3 and Beclin-1 in brain tissues of adult male Sprague-Dawley (SD) rats, rat primary cultured neurons and the rat adrenal pheochromocytoma cells (PC12 cells) after METH exposure...
2017: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/28694434/laquinimod-treatment-in-the-r6-2-mouse-model
#16
Gisa Ellrichmann, Alina Blusch, Oluwaseun Fatoba, Janine Brunner, Liat Hayardeny, Michael Hayden, Dominik Sehr, Konstanze F Winklhofer, Carsten Saft, Ralf Gold
The transgenic mouse model R6/2 exhibits Huntington's disease (HD)-like deficits and basic pathophysiological similarities. We also used the pheochromocytoma-12 (PC12)-cell-line-model to investigate the effect of laquinimod on metabolic activity. Laquinimod is an orally administered immunomodulatory substance currently under development for the treatment of multiple sclerosis (MS) and HD. As an essential effect, increased levels of BDNF were observed. Therefore, we investigated the therapeutic efficacy of laquinimod in the R6/2 model, focusing on its neuroprotective capacity...
July 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28693096/chiral-penicillamine-modified-selenium-nanoparticles-enantioselectively-inhibit-metal-induced-amyloid-%C3%AE-aggregation-for-treating-alzheimer-s-disease
#17
Dongdong Sun, Weiwei Zhang, Qianqian Yu, Xu Chen, Meng Xu, Yanhui Zhou, Jie Liu
Nanometer-scale chirality has gained significant interest from different research fields due to its fundamental importance in nature and living matter. In this study, we design and synthesize chiral penicillamine-capped selenium nanoparticles (l-/d-Pen@Se NPs) that can act as a novel class of chiral amyloid-β (Aβ) inhibitors. In this work, d-Pen@Se NPs demonstrate higher inhibition efficiency, as well as ameliorate cognition and memory impairments. We used rat pheochromocytoma (PC12) cells to perform real-time cell analysis assay (RTCA) to probe the potential cytotoxicity of l-/d-Pen@Se NPs...
June 27, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28691036/detection-of-secondary-causes-and-coexisting-diseases-in-hypertensive-patients-osa-and-pa-are-the-common-causes-associated-with-hypertension
#18
Lei Wang, Nanfang Li, Xiaoguang Yao, Guijuan Chang, Delian Zhang, Mulalibieke Heizhati, Menghui Wang, Qin Luo, Jianqiong Kong
BACKGROUND: Since the control rate of blood pressure is lower in mainland China, the aim of this study is to investigate the proportion of secondary causes and coexisting diseases of hypertension in hypertensive patients. METHODS: Data on consecutive patients with hypertension who visited the Hypertension Center. Diseases were detected using an established strict screening protocol. RESULTS: Detection rate of secondary causes and coexisting diseases of hypertension was 39...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28688648/nationwide-review-of-hormonally-active-adrenal-tumors-highlights-high-morbidity-in-pheochromocytoma
#19
Punam P Parikh, Gustavo A Rubio, Josefina C Farra, John I Lew
BACKGROUND: Adrenal adenomas are benign tumors often discovered incidentally, and >70% are hormonally inactive. The remaining subset may produce excess aldosterone, cortisol, or catecholamine. Perioperative outcomes after adrenalectomy for such "hormonally active" tumors remain unclear. This study examines in-hospital outcomes after unilateral adrenalectomy for hormonally active tumors. METHODS: A retrospective review was performed using the Nationwide Inpatient Sample (2006-2011) to identify patients undergoing unilateral adrenalectomy for hormonally active or inactive tumors...
July 2017: Journal of Surgical Research
https://www.readbyqxmd.com/read/28687023/adrenalectomy-for-incidentaloma-lessons-learned-from-a-single-centre-series-of-274-patients
#20
Sébastien Gaujoux, Adeline Aimé, Guillaume Assié, Roberto Ciuni, Stéphane Bonnet, Florence Tenenbaum, Jérome Bertherat, Bertrand Dousset
BACKGROUND: Adrenal incidentalomas are increasingly diagnosed and include a wide spectrum of lesions from benign adenomas to secreting or malignant lesions. The aim of the present study is to report a large single-institution experience of patients undergoing surgery for adrenal incidentaloma with particular attention to their diagnosis and post-operative course and the evolution of surgical practice over time. METHODS: From 1993 to 2013, 274 patients underwent adrenalectomy for incidentaloma...
July 7, 2017: ANZ Journal of Surgery
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