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pituitary tumor

D-W Wang, Y-Q Wang, H-S Shu
OBJECTIVE: Extracellular signal-regulated kinase (ERK)/mitogen activated protein kinase (MAPK) signal pathway participates in cell proliferation, cycle, and apoptosis. MiR-16 is down-regulated in the pituitary tumor. This study investigated the role and related mechanism of miR-16 on pituitary tumor proliferation, cycle, and apoptosis. PATIENTS AND METHODS: Dual-luciferase reporter assay was conducted to demonstrate the targeted regulation between miR-16 and MEK1...
March 2018: European Review for Medical and Pharmacological Sciences
Isabella P P Grande, Paulo V G H Amorim, Ane Caroline Thé B Freire, Raquel S Jallad, Nina R Musolino, Valter A Cescato, Gilberto O da Silva, Marcello D Bronstein, Ericka B Trarbach
Sirtuins 1-7 (SIRT) are a highly conserved family of histone deacetylases involved in the regulation of longevity that have a considerable impact in transcription, DNA repair regulation, telomeric stability, cell senescence and apoptosis. In the present study, SIRT1-7 mRNA levels were evaluated in 37 somatotropinomas and 31 nonfunctioning pituitary adenomas (NFPAs) using qPCR and relation to tumor size, invasiveness and Ki-67 proliferative index was made. Overexpression of SIRT1 was observed in 86.5% of somatotropinomas versus 41...
March 21, 2018: Pituitary
Elisa Vaiani, Cintia Morales, Florencia Soto, Yeny Blanco, Carlos Rugilo, Marta Ciaccio, Alicia Belgorosky
Giant prolactinomas are rare pituitary adenomas characterized by their great local invasion. In this paper, we report a 15-year-old male with left retro-ocular pain and ipsilateral exophthalmos of 4 months of evolution, secondary to a tumour in the base of the skull that invaded the orbit. Hormonal studies revealed serum prolactin of 6913,7 ng/ml (normal value < 20), confirming the diagnosis of giant prolactinoma. The patient started treatment with the dopaminergic agonist cabergoline in increasing doses...
April 1, 2018: Archivos Argentinos de Pediatría
Toshihiko Wakabayashi, Atsushi Natsume, Junki Mizusawa, Hiroshi Katayama, Haruhiko Fukuda, Minako Sumi, Ryo Nishikawa, Yoshitaka Narita, Yoshihiro Muragaki, Takashi Maruyama, Tamio Ito, Takaaki Beppu, Hideo Nakamura, Takamasa Kayama, Shinya Sato, Motoo Nagane, Kazuhiko Mishima, Yoko Nakasu, Kaoru Kurisu, Fumiyuki Yamasaki, Kazuhiko Sugiyama, Takanori Onishi, Yasuo Iwadate, Mizuhiko Terasaki, Hiroyuki Kobayashi, Akira Matsumura, Eiichi Ishikawa, Hikaru Sasaki, Akitake Mukasa, Takayuki Matsuo, Hirofumi Hirano, Toshihiro Kumabe, Nobusada Shinoura, Naoya Hashimoto, Tomokazu Aoki, Akio Asai, Tatsuya Abe, Atsuo Yoshino, Yoshiki Arakawa, Kenichiro Asano, Koji Yoshimoto, Soichiro Shibui
PURPOSE: This study explored the superiority of temozolomide (TMZ) + interferonβ (IFNβ) to standard TMZ as treatment for newly diagnosed glioblastoma (GBM) via randomized phase II screening design. EXPERIMENTAL DESIGN: Eligibility criteria included histologically proven GBM, with 50% of the tumor located in supratentorial areas, without involvement of the optic, olfactory nerves, and pituitary gland and without multiple lesions and dissemination. Patients in the TMZ + radiotherapy (RT) arm received RT (2...
March 20, 2018: Journal of Neuro-oncology
Wang Song, Liu Qian, Guo Jing, Feng Jie, Shan Xiaosong, Liu Chunhui, Li Yangfang, Li Guilin, Hua Gao, Zhang Yazhuo
Non-functioning pituitary adenomas (NFPAs) are the most common pituitary tumors and mainly invade the sphenoid, cavernous sinus or dura mate. Aberrant regulation of the Wnt signaling pathway plays an important role in tumorigenesis. This study was designed to investigate the relationships between secreted frizzled-related proteins (sFRPs), WIF1 genes and the invasion of NFPAs by tissue microassays (TMAs) of samples from 163 patients. Significantly weaker staining of WIF1 and sFRP4 were detected in the invasive group compared with the non-invasive group by TMAs (p = 0...
March 16, 2018: Molecular and Cellular Endocrinology
Roman Rotermund, Till Burkhardt, Zaina Rohani, Roman Jung, Jens Aberle, Jörg Flitsch
OBJECTIVE: There is no ideal marker to identify residual tumor tissue after surgery in patients with acromegaly. The purpose was to elucidate if early postoperative hormone testing gives reliable information regarding complete resection of a GH-producing pituitary adenoma. DESIGN: Fourty-eight patients undergoing surgery for acromegaly from 04/2013-05/2014 were prospectively examined for random GH, IGF1, and GH levels after oral glucose tolerance testing (OGTT) in the early postoperative phase and on follow-up...
March 8, 2018: Growth Hormone & IGF Research
Lee A Zimmer, Norberto Andaluz
Endoscopic transsphenoidal surgery for pituitary tumors is an increasingly common practice. Little has been reported on the incidence and treatment of postoperative epistaxis in this population. The aim of this study was to analyze the incidence of postoperative epistaxis and formulate a treatment algorithm based on our experience. We performed a case series with chart review. A total of 434 consecutive patients who had endoscopic transsphenoidal pituitary surgery were identified between April 2006 and November 2013...
March 2018: Ear, Nose, & Throat Journal
Levent Trabzonlu, Tugce Agirlar Trabzonlu, Yesim Gurbuz, Savas Ceylan
Here, we present a case of pituitary adenoma producing adrenocorticotropic hormone (ACTH) in a 19-year-old woman. The patient was admitted to neurosurgery clinic because of a headache and decreased visual acuity. Transsphenoidal resection was performed. Microscopic examination of the tumor revealed signet-ring-like cell areas intermixed with conventional pituitary adenoma cells. Both populations of tumor cells showed immunoreactivity for chromogranin, synaptophysin, and ACTH. To date, there have been 3 reports of pituitary adenoma with signet-ring-like changes...
March 17, 2018: Applied Immunohistochemistry & Molecular Morphology: AIMM
M McGowan, M K Holland, G Boe-Hansen
This review focuses on current understanding of prenatal, prepubertal and post-pubertal development of the male reproductive system of cattle. The critical developmental events occur during the first 3 to 4 months of gestation and the first ~6 to 9 months after birth. The Wilms Tumor-1 and SRY proteins play critical roles in early development and differentiation of the fetal testis, which in turn drives gestational development of the entire male reproductive system. The hypothalamic-pituitary-gonadal axis matures earlier in the bovine fetus than other domestic species with descent of the testes into the scrotum occurring around the 4th month of gestation...
March 19, 2018: Animal: An International Journal of Animal Bioscience
Maria Eugenia Sabatino, Ezequiel Grondona, Liliana D V Sosa, Bethania Mongi Bragato, Lucia Carreño, Virginia Juarez, Rodrigo A da Silva, Aline Remor, Lucila de Bortoli, Roberta de Paula Martins, Pablo A Pérez, Juan Pablo Petiti, Silvina Gutiérrez, Alicia I Torres, Alexandra Latini, Ana L De Paul
The cellular transformation of normal functional cells to neoplastic ones implies alterations in the cellular metabolism and mitochondrial function in order to provide the bioenergetics and growth requirements for tumour growth progression. Currently, the mitochondrial physiology and dynamic shift during pituitary tumour development are not well understood. Pituitary tumors present endocrine neoplastic benign growth which, in previous reports, we had shown that in addition to increased proliferation, these tumours were also characterized by cellular senescence signs with no indication of apoptosis...
March 13, 2018: Free Radical Biology & Medicine
Bo Diao, Ying Liu, Guo-Zheng Xu, Yi Zhang, Jun Xie, Jie Gong
Galectin-3 (Gal-3), a β-galactoside-binding protein, has been implicated in cell proliferation, cell adhesion, and the progression and metastasis of various types of cancer. The present study investigated the involvement of Gal-3 in the tumorigenesis and progression of pituitary tumors using three rat pituitary tumor cell lines. Following transfection with Gal-3 expression and interference vectors, the impact of Gal-3 on proliferation, apoptosis and migration of pituitary tumor cells was been investigated...
April 2018: Oncology Letters
Khaled Elshazly, Varun R Kshettry, Christopher J Farrell, Gurston Nyquist, Marc Rosen, James J Evans
BACKGROUND: Giant pituitary adenomas represent a surgical challenge. We present the results of the endoscopic endonasal approach (EEA) for giant pituitary adenomas. METHODS: We retrospectively reviewed medical records of 55 patients with giant pituitary adenomas (> 4 cm in maximum diameter) that underwent an EEA from 2008 - 2016. Factors affecting the extent of resection (EOR) were evaluated. RESULTS: Mean age was 55.5 years. All tumors were non-functional except in four patients (GH-secreting [2], ACTH-secreting [1], prolactinoma [1])...
March 12, 2018: World Neurosurgery
B A Kadashev, A N Konovalov, L I Astaf'eva, P L Kalinin, M A Kutin, I S Klochkova, D V Fomichev, O I Sharipov, D N Andreev
The pituitary stalk (PS) is a relatively thin bundle connecting the hypophyseal stalk to the pituitary gland; it consists of both axons of the hypothalamic nuclei (terminating in the neurohypophysis) and the system of portal vessels. Compression of the PS by a space-occupying lesion or its transection (forced or intended) during surgery may lead to the development of endocrine disorders: hypopituitarism, diabetes insipidus, and hyperprolactinemia. The modern literature lacks studies evaluating the severity of endocrine disorders depending on the PS condition before and after surgery...
2018: Zhurnal Voprosy Neĭrokhirurgii Imeni N. N. Burdenko
Adrian F Daly, Emily Castermans, Lindsey Oudijk, Mirtha A Guitelman, Pablo Beckers, Iulia Potorac, Sebastian J C M M Neggers, Nathalie Sacre, Aj Van der Lely, Vincent Bours, Wouter W de Herder, Albert Beckers
Copy number variations (CNV), an important genetic mechanism in inherited tumor genetics, can affect large genetic regions or can be limited to smaller regions within genes, such deletions of single exons. Such exon deletions can be challenging to identify and sequencing can be normal in these cases. Multiplex ligation dependent probe amplification (MLPA) can identify CNV of individual exons. Mutations in the MAX gene are associated with a risk of sporadic and hereditary pheochromocytoma. As mutations in other pheochromocytoma related genes can also cause pituitary tumors (3P-Association), we studied whether MAX exon deletions were involved in the etiology of patients with an unexplained association of multiple endocrine neoplasia including pituitary adenoma and pheochromocytoma...
March 13, 2018: Endocrine-related Cancer
Luis V Syro, Fabio Rotondo, Leon D Ortiz, Kalman Kovacs
Temozolomide is an alkylating chemotherapeutic agent used in malignant neuroendocrine neoplasia, melanoma, brain metastases, and an essential component of adjuvant therapy in the treatment of glioblastoma multiforme and anaplastic astrocytoma. Since 2006 it has been used for the treatment of pituitary carcinomas and aggressive pituitary adenomas. Here, we discuss the current indications and results of temozolomide therapy in pituitary tumors, as well as frequently asked questions regarding temozolomide treatment, duration of therapy, dosage, tumor recurrence, and resistance...
March 13, 2018: Endocrine-related Cancer
Michael T Milano, Jimm Grimm, Scott G Soltys, Ellen Yorke, Vitali Moiseenko, Wolfgang A Tomé, Arjun Sahgal, Jinyu Xue, Lijun Ma, Timothy D Solberg, John P Kirkpatrick, Louis S Constine, John C Flickinger, Lawrence B Marks, Issam El Naqa
PURPOSE: Dosimetric and clinical predictors of radiation-induced optic nerve/chiasm neuropathy (RION) after single-fraction stereotactic radiosurgery (SRS) or hypofractionated (2-5 fractions) radiosurgery (fSRS) were analyzed from pooled data that were extracted from published reports (PubMed indexed from 1990 to June 2015). This study was undertaken as part of the American Association of Physicists in Medicine Working Group on Stereotactic Body Radiotherapy, investigating normal tissue complication probability (NTCP) after hypofractionated radiation...
January 31, 2018: International Journal of Radiation Oncology, Biology, Physics
Z Huo, D R Zhong
No abstract text is available yet for this article.
March 6, 2018: Zhonghua Yi Xue za Zhi [Chinese medical journal]
Z B Wu
No abstract text is available yet for this article.
March 6, 2018: Zhonghua Yi Xue za Zhi [Chinese medical journal]
X H Liu, Y C Jiao, R Z Wang
No abstract text is available yet for this article.
March 6, 2018: Zhonghua Yi Xue za Zhi [Chinese medical journal]
X Y Liu, S S Cai, S Zhang, X F Wang
No abstract text is available yet for this article.
March 8, 2018: Zhonghua Bing Li Xue za Zhi Chinese Journal of Pathology
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