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pheochromocytoma treatment

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https://www.readbyqxmd.com/read/28694434/laquinimod-treatment-in-the-r6-2-mouse-model
#1
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
#2
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/28685506/update-on-modern-management-of-pheochromocytoma-and-paraganglioma
#3
REVIEW
Jacques W M Lenders, Graeme Eisenhofer
Despite all technical progress in modern diagnostic methods and treatment modalities of pheochromocytoma/paraganglioma, early consideration of the presence of these tumors remains the pivotal link towards the best possible outcome for patients. A timely diagnosis and proper treatment can prevent the wide variety of potentially catastrophic cardiovascular complications. Modern biochemical testing should include tests that offer the best available diagnostic performance, measurements of metanephrines and 3-methoxytyramine in plasma or urine...
June 2017: Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28685225/phase-ii-trial-of-pazopanib-in-advanced-progressive-malignant-pheochromocytoma-and-paraganglioma
#4
Sina Jasim, Vera J Suman, Camilo Jimenez, Pamela Harris, Kostandinos Sideras, Jill K Burton, Francis Paul Worden, Richard J Auchus, Keith C Bible
INTRODUCTION: Pheochromocytomas and paragangliomas (Pheo/PGL) are rare, vascular, sometimes malignant endocrine tumors. Case reports indicate the activity of vascular endothelium growth factor receptor-targeted kinase inhibitors in these cancers. OBJECTIVES: To assess the antitumor activity and tolerability of pazopanib in progressive malignant Pheo/PGL. PATIENTS AND METHODS: This multicenter Phase II trial (MC107C) enrolled individuals  ≥18 years old with disease progression ≤ 6 months prior to registration, Eastern Cooperative Oncology Group PS 0-2, and measurable disease (response evaluation criteria in solid tumors 1...
August 2017: Endocrine
https://www.readbyqxmd.com/read/28677782/nicd-inhibits-cell-proliferation-and-promotes-apoptosis-and-autophagy-in-pc12-cells
#5
Bo Li, Ping Duan, Xuefei Han, Wenhai Yan, Ying Xing
Pheochromocytoma is a tumor of the adrenal medulla for which surgical resection is the only therapy. Though the Notch1 signaling pathway has been suggested as a target for pheochromocytoma treatment, the effect of Notch1 intracellular domain (NICD) on pheochromocytoma cell growth remains unknown. In the present study, the effect of NICD on pheochromocytoma cell growth was examined, by use of a tetracycline‑inducible system for NICD overexpression in the PC12 pheochromocytoma cell line. Flow cytometry was used to determine the effect of NICD on cell cycle phase distribution and apoptosis in PC12 cells...
June 29, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28675758/metformin-suppresses-proliferation-and-viability-of-rat-pheochromocytoma-cells
#6
Min Li, Xiuli Jiang, Tingwei Su, Lei Jiang, Weiwei Zhou, Weiqing Wang
BACKGROUND Previous studies have clearly demonstrated that metformin inhibits cell proliferation and cell growth in many types of human cancers. Increased survival rates in patients with breast and lung cancer receiving metformin have also been observed. However, the effect of metformin on pheochromocytoma cells remains unexplored. MATERIAL AND METHODS Rat pheochromocytoma cells (PC12 cells) were cultured and treated with metformin or vehicle control. Cell proliferation, cell-cycle, apoptosis, genes expression, and the signaling pathways involved were analyzed in PC12 cells...
July 4, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/28670912/mandibular-lytic-lesion-in-familial-paraganglioma-syndrome-type-i-a-clinical-conundrum
#7
Parul Sinha, Sonia N Yuen, Rebecca D Chernock, Bruce H Haughey
OBJECTIVE: The entity of primary mandibular paraganglioma (PGL) is not well accepted within the head and neck. Mandibular PGLs hitherto reported in literature are malignant metastatic lesions, mostly from a pheochromocytoma. METHODS: We report a case of mandibular lytic lesion in a young female with multifocal PGLs but no family history of PGLs. We also performed a literature search to identify published cases of mandibular PGL. RESULTS: Lack of established criteria for malignancy in a PGL made diagnosis and treatment challenging...
June 1, 2017: Annals of Otology, Rhinology, and Laryngology
https://www.readbyqxmd.com/read/28667082/new-hif2a-inhibitors-implications-for-pheochromocytomas-and-paragangliomas
#8
Rodrigo Almeida Toledo
Two recent independent studies published in Nature show robust responses of clear cell renal cell carcinoma (ccRCC) cell lines, preclinical ccRCC xenograft models and, remarkably, a patient with progressive ccRCC despite receiving multiple lines of treatment, to the long-awaited, recently developed inhibitors of hypoxia-inducible factor 2-alpha (HIF2α). This Commentary is based on the recognition of similar molecular drivers in ccRCC and the endocrine neoplasias pheochromocytomas and paragangliomas (PPGLs), ultimately leading to stabilization of HIFs...
June 30, 2017: Endocrine-related Cancer
https://www.readbyqxmd.com/read/28666346/insulin-secretion-and-insulin-sensitivity-before-and-after-surgical-treatment-of-pheochromocytoma-or-paraganglioma
#9
Hisako Komada, Yushi Hirota, Anna So, Tomoaki Nakamura, Yoko Okuno, Hidenori Fukuoka, Genzo Iguchi, Yutaka Takahashi, Kazuhiko Sakaguchi, Wataru Ogawa
Context: Pheochromocytoma and paraganglioma are catecholamine-producing tumors that often impair glucose tolerance. The effects of these tumors on insulin sensitivity and insulin secretion in patients have remained unclear, however. Objective: To characterize the influence of pheochromocytoma or paraganglioma on glucose tolerance, we comprehensively analyzed various parameters related to insulin secretion or insulin sensitivity in patients with these tumors. Design: Hyperglycemic and hyperinsulinemic-euglycemic clamps as well as an oral glucose tolerance test (OGTT) were performed in subjects before and after tumor excision...
June 28, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28662711/repurposing-propranolol-as-a-drug-for-the-treatment-of-retinal-haemangioblastomas-in-von-hippel-lindau-disease
#10
Virginia Albiñana, Rosa María Jiménez Escribano, Isabel Soler, Luis Rodríguez Padial, Lucia Recio-Poveda, Karina Villar Gómez de Las Heras, Luisa María Botella
BACKGROUND: Von Hippel-Lindau (VHL) disease is a rare oncological disease with an incidence of 1:36,000, and is characterized by the growth of different types of tumours. Haemangioblastomas in the central nervous system (CNS) and retina, renal carcinoma and pheochromocytomas are the most common tumours. The absence of treatment for VHL leads to the need of repeated surgeries as the only option for these patients. Targeting VHL-derived tumours with drugs with reduced side effects is urgent to avoid repeated CNS surgeries...
June 29, 2017: Orphanet Journal of Rare Diseases
https://www.readbyqxmd.com/read/28660991/insulin-resistance-in-endocrine-disorders-treatment-options
#11
Anita Rogowicz-Frontczak, Anna Majchrzak, Dorota Zozulińska-Ziółkiewicz
Changes in sensitivity to insulin occur in the course of a number of endocrine disorders. Most of the hormones through their antagonistic action to insulin lead to increased hepatic glucose output and its decreased utilisation in peripheral tissues. Carbohydrate disorders observed in endocrine diseases result from the phenomenon of insulin resistance, and in some cases also a reduction in insulin secretion is present. Abnormalities of glucose metabolism are observed in acromegaly, but also in growth hormone deficiency, hypercortisolism in the course of Cushing's syndrome, hyper- or hypothyroidism, primary hyperparathyroidism, aldosteronism, pheochromocytoma, congenital hypertrophy of the adrenal glands, polycystic ovaries syndrome, hypogonadism, or other hormonally active neuroendocrine tumours...
2017: Endokrynologia Polska
https://www.readbyqxmd.com/read/28641581/thyrotoxic-and-pheochromocytoma-multisystem-crisis-a-case-report
#12
Kodai Suzuki, Takahito Miyake, Hideshi Okada, Fuminori Yamaji, Yuichiro Kitagawa, Tetsuya Fukuta, Ryu Yasuda, Yoshihito Tanaka, Haruka Okamoto, Sho Nachi, Tomoaki Doi, Takahiro Yoshida, Keisuke Kumada, Shozo Yoshida, Hiroaki Ushikoshi, Izumi Toyoda, Shinji Ogura
BACKGROUND: Thyrotoxic crisis and pheochromocytoma multisystem crisis are rare, life-threatening, emergency endocrine diseases with various clinical manifestations. Here we report a case of a patient who simultaneously developed thyrotoxic crisis and pheochromocytoma multisystem crisis and required intensive cardiovascular management. CASE PRESENTATION: A 60-year-old Asian man experienced nausea and vomiting, and subsequently developed dyspnea and cold sweats while farming...
June 23, 2017: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/28639759/-diabetes-mellitus-secondary-to-an-endocrine-pathology-when-to-think-about-it
#13
Nathalie Rouiller, François R Jornayvaz
An endocrine disease can be associated with glucose intolerance or diabetes mellitus, and the latter can falsely be considered as type 2 diabetes. Glycemic imbalance can be a direct or indirect consequence of excessive hormone production. Endocrine diseases such as acromegaly, Cushing's syndrome and pheochromocytoma can increase glucose production and cause insulin resistance. Hyperthyroidism, hyperaldosteronism, glucagonoma and somatostatinoma lead to hyperglycemia by other physiopathological mechanisms detailed in this article...
May 31, 2017: Revue Médicale Suisse
https://www.readbyqxmd.com/read/28638863/neuroprotective-effect-of-terminalia-chebula-extracts-and-ellagic-acid-in-pc12-cells
#14
Yuh-Chiang Shen, Chi-Wen Juan, Che-San Lin, Chien-Chih Chen, Chia-Lin Chang
BACKGROUND: Alzheimer's disease (AD) is one of the common neurodegenerative disorders among elderly. The purpose of this study was to determine the neuroprotective effect and mechanisms of action underlying the Terminalia chebula extracts and ellagic acid by using beta-amyloid25-35 (Aβ25-35)-induced cell toxicity in an undifferentiated pheochromocytoma (PC12) cell line. MATERIALS AND METHODS: The T. chebula extracts were prepared using the methanol, water, and 95% ethanol...
2017: African Journal of Traditional, Complementary, and Alternative Medicines: AJTCAM
https://www.readbyqxmd.com/read/28629153/compositional-characteristics-and-in-vitro-evaluations-of-antioxidant-and-neuroprotective-properties-of-crude-extracts-of-fucoidan-prepared-from-compressional-puffing-pretreated-sargassum-crassifolium
#15
Wen-Ning Yang, Po-Wei Chen, Chun-Yung Huang
Fucoidan, a fucose-containing sulfated polysaccharide with diverse biological functions, is mainly recovered from brown algae. In this study, we utilized a compressional-puffing process (CPP) to pretreat Sargassum crassifolium (SC) and extracted fucoidans from SC by warm water. Three fucoidan extracts (SC1: puffing at 0 kg/cm²; SC2: puffing at 1.7 kg/cm²; and SC3: puffing at 6.3 kg/cm²) were obtained, and their composition, and antioxidant and neuroprotective activities were examined. The results suggest that CPP decreased the bulk density of algal samples, expanded the algal cellular structures, and eliminated the unpleasant algal odor...
June 18, 2017: Marine Drugs
https://www.readbyqxmd.com/read/28587338/mediation-of-insulin-growth-factor-1-in-alzheimer-s-disease-and-the-mechanism-of-prnp-genetic-expression-and-the-pi3k-akt-signaling-pathway
#16
Guohong Jiang, Changming Wang, Jun Zhang, Haijun Liu
The aim of the study was to examine the mediation of insulin growth factor-1 (IGF-1) in Alzheimer's disease (AD), as well as the underlying mechanism of the PRNP genetic expression and PI3K/Akt signaling pathway. The Aβ25-35-incubated rat adrenal pheochromocytoma cell (PC12) in vitro was established, constituting the AD model. Different doses (0, 20, 40 and 80 ng/ml) of IGF-1 were used in PC12 cells and the level of PRNP mRNA was tested after 24 h using the quantitative PCR method and the level of APP protein was assessed using western blot analysis...
June 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28585682/the-usefulness-of-laparoscopic-adrenalectomy-in-the-treatment-of-adrenal-neoplasms-a-single-centre-experience
#17
Ryszard Pogorzelski, Sadegh Toutounchi, Ewa Krajewska, Patryk Fiszer, Agata Kącka, Mariusz Piotrowski, Małgorzata Szostek, Tomasz Wołoszko, Krzysztof Celejewski, Urszula Ambroziak, Tomasz Bednarczuk, Zbigniew Gałązka
INTRODUCTION: Adrenal neoplasms comprise about 10% of all tumours affecting this organ and constitute a significant, at first diagnostic and subsequently therapeutic, problem, especially since a relatively high proportion of neoplastic lesions are asymptomatic. The number of diagnosed metastases to adrenal glands is increasing. Surgical treatment involves both open surgery as well as laparoscopy. MATERIAL AND METHODS: There were 235 adrenalectomies performed at our centre due to various indications over the past four years...
June 6, 2017: Endokrynologia Polska
https://www.readbyqxmd.com/read/28566531/sdhb-mutation-carriers-with-malignant-pheochromocytoma-respond-better-to-cvd
#18
Lauren Fishbein, Sivan Ben-Maimon, Stephen Keefe, Keith Cengel, Daniel A Pryma, Arturo Loaiza-Bonilla, Douglas L Fraker, Katherine L Nathanson, Debbie L Cohen
Pheochromocytomas and paragangliomas (PCC/PGL) are tumors in the adrenal medulla and extra adrenal sites, respectively. About a quarter are metastatic, often with a long latency period. Some PCC/PGL are defined as clinically aggressive given extensive local invasion into adjacent normal tissue. These tumors, like metastatic PCC/PGL, cannot be surgically cured and patients can have continued secretion of excessive catecholamines with all related sequelae. For patients with metastatic or aggressive tumors, treatment options are limited...
May 31, 2017: Endocrine-related Cancer
https://www.readbyqxmd.com/read/28550366/minimally-invasive-resection-of-adrenal-masses-in-infants-and-children-results-of-a-european-multi-center-survey
#19
Francesco Fascetti-Leon, Giovanni Scotton, Luca Pio, Raimundo Beltrà, Paolo Caione, Ciro Esposito, Girolamo Mattioli, Amulya K Saxena, Sabine Sarnaki, Piergiorgio Gamba
BACKGROUND: Minimal access adrenal surgery (MAAS) for adrenal pathologies is the standard for many pediatric surgical centers. However, the literature offers few reports and minimal evidence from small case series. The aim of this study was to evaluate the outcomes of pediatric MAAS through a multi-center data analysis. METHOD: Pediatric patients who underwent MAAS between January 2002 and December 2013 were retrospectively included. Data analysis was conducted using Spss software (Welch's t-test, X-square, Fisher tests, multiple regression model)...
May 26, 2017: Surgical Endoscopy
https://www.readbyqxmd.com/read/28515932/single-stage-laparoscopic-adrenalectomy-for-pheochromocytoma-and-enucleation-of-a-pancreatic-neuroendocrine-tumor-in-von-hippel-lindau-disease-a-case-report
#20
Marco Casaccia, Simona Macina, Rosario Fornaro
Von Hippel-Lindau (VHL) disease is an inherited syndrome with autosomal-dominant transmission, characterized by central nervous system and retinal hemangioblastomas, visceral cysts and tumors. Optimal surgical treatment, including its timing, remains a controversial topic. The present study reports the case of a 67-year-old female patient with adrenal and pancreatic manifestations of VHL. A laparoscopic cortex-sparing left adrenalectomy for a 4-cm pheochromocytoma and pancreatic enucleation for pancreatic polypeptidoma of the pancreas tail were performed during the same operative procedure...
May 2017: Molecular and Clinical Oncology
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