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endocrine and pituitary

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https://www.readbyqxmd.com/read/29783652/pituitary-gonadal-thyroid-hormones-and-endocrine-disruptors-in-pre-and-postmenopausal-nigerian-women-with-er-pr-and-her-2-positive-and-negative-breast-cancers
#1
Olulope Ajayi, Mabel Charles-Davies, John Anetor, Adeyinka Ademola
Breast cancer is broadly sub-divided into hormone responsive and non-hormone responsive subtypes. Estradiol has been associated with hormone responsive breast cancers. There is, however, a paucity of information on the role of sex hormones, gonadotropins, and thyroid hormone in non-hormone responsive breast cancer. This study aimed to determine differences in the serum levels of sex hormones, gonadotropins, thyroid hormones, and endocrine disruptors (lead, cadmium, and arsenic) in Nigerian women with hormone responsive and non-hormone responsive breast cancers...
May 18, 2018: Medical Sciences: Open Access Journal
https://www.readbyqxmd.com/read/29783006/technique-of-whole-sellar-stereotactic-radiosurgery-for-cushing-s-disease-results-from-a-multicenter-international-cohort-study
#2
Matthew J Shepard, Gautam U Mehta, Zhiyuan Xu, Hideyuki Kano, Nathaniel Sisterson, Yan-Hua Su, Michal Krsek, Ahmed M Nabeel, Amr El-Shehaby, Khaled A Kareem, Nuria Martinez-Moreno, David Mathieu, Brendan J McShane, Kevin Blas, Douglas Kondziolka, Inga Grills, John Y Lee, Roberto Martinez-Alvarez, Wael A Reda, Roman Liscak, Cheng-Chia Lee, L Dade Lunsford, Mary Lee Vance, Jason P Sheehan
BACKGROUND: Stereotactic radiosurgery (SRS) is used to manage patients with Cushing's disease (CD) who have failed surgical/medical management. As many patients with recurrent/persistent CD lack an identifiable adenoma on neuro-imaging, whole-sellar SRS has been increasingly employed. We therefore sought to define the outcomes of patients undergoing whole-sellar SRS. METHODS: An international, multicenter, retrospective cohort-design was used to define clinical/endocrine outcomes for patients undergoing whole-sellar SRS for CD...
May 18, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29779584/imaging-endocrinology-in-animal-models-of-endocrine-disease
#3
REVIEW
Patrice Mollard, Marie Schaeffer
Endocrine organs secrete a variety of hormones involved in the regulation of a multitude of body functions. Although pancreatic islets were discovered at the turn of the 19th century, other endocrine glands remained commonly described as diffuse endocrine systems. Over the last two decades, development of new imaging techniques and genetically-modified animals with cell-specific fluorescent tags or specific hormone deficiencies have enabled in vivo imaging of endocrine organs and revealed intricate endocrine cell network structures and plasticity...
June 2018: Best Practice & Research. Clinical Endocrinology & Metabolism
https://www.readbyqxmd.com/read/29778320/simultaneously-avoiding-the-hippocampus-and-hypothalamic-pituitary-axis-during-whole-brain-radiotherapy-a-planning-study
#4
Xing-Wen Fan, Juan-Qi Wang, Jun-Lan Wu, Hong-Bing Wang, Kai-Liang Wu
Whole brain radiotherapy (WBRT) is the preferred treatment for multiple brain metastases, and patients with limited-stage small cell lung cancer undergo prophylactic cranial irradiation after complete remission. However, neurotoxicity remains a complication. In addition to protecting the hippocampus from irradiation to preserve cognitive function, it is also critical to avoid irradiating the hypothalamic-pituitary axis to preserve endocrine and immune function. This study aimed to evaluate the feasibility of delivering WBRT while protecting the hippocampus and hypothalamic-pituitary axis...
May 16, 2018: Medical Dosimetry: Official Journal of the American Association of Medical Dosimetrists
https://www.readbyqxmd.com/read/29773976/facing-the-challenges-of-neuropeptide-gene-knockouts-why-do-they-not-inhibit-reproduction-in-adult-teleost-fish
#5
REVIEW
Vance L Trudeau
Genetic manipulation of teleost endocrine systems started with transgenic overexpression of pituitary growth hormone. Such strategies enhance growth and reduce fertility, but the fish still breed. Genome editing using transcription activator-like effector nuclease in zebrafish and medaka has established the role of follicle stimulating hormone for gonadal development and luteinizing hormone for ovulation. Attempts to genetically manipulate the hypophysiotropic neuropeptidergic systems have been less successful...
2018: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/29773951/the-role-of-neuroinflammation-and-neurovascular-dysfunction-in-major-depressive-disorder
#6
REVIEW
Sang Won Jeon, Yong-Ku Kim
Although depression has generally been explained with monoamine theory, it is far more multifactorial, and therapies that address the disease's pathway have not been developed. In this context, an understanding of neuroinflammation and neurovascular dysfunction would enable a more comprehensive approach to depression. Inflammation is in a sense a type of allostatic load involving the immune, endocrine, and nervous systems. Neuroinflammation is involved in the pathophysiology of depression by increasing proinflammatory cytokines, activating the hypothalamus-pituitary-adrenal axis, increasing glucocorticoid resistance, and affecting serotonin synthesis and metabolism, neuronal apoptosis and neurogenesis, and neuroplasticity...
2018: Journal of Inflammation Research
https://www.readbyqxmd.com/read/29772978/outcomes-of-the-addition-of-pasireotide-to-traditional-adrenal-directed-treatment-for-dogs-with-pituitary-dependent-hyperadrenocorticism-secondary-to-macroadenoma-9-cases-2013-2015
#7
Maya Lottati, David S Bruyette
OBJECTIVE To evaluate clinical signs, endocrine test results, and pituitary tumor size for dogs with medically managed pituitary-dependent hyperadrenocorticism (PDH) and macroadenoma following 6 months of concurrent treatment with pasireotide. DESIGN Prospective case series. ANIMALS 9 client-owned dogs with PDH and macroadenoma in which PDH had been successfully managed with adrenal-directed treatment (trilostane or mitotane). PROCEDURES Dogs were given pasireotide (0.03 mg/kg [0.014 mg/lb], SC, q 12 h) for 6 months, while adrenal-directed treatment was continued...
June 1, 2018: Journal of the American Veterinary Medical Association
https://www.readbyqxmd.com/read/29771302/physical-linkage-of-estrogen-receptor-%C3%AE-and-aromatase-in-rat-oligocrine-and-endocrine-actions-of-cns-produced-estrogens
#8
Emiliya M Storman, Nai-Jiang Liu, Martin W Wessendorf, Alan R Gintzler
Rapid-signaling membrane estrogen receptors and aromatase are present throughout the central nervous system (CNS), enabling acute regulation of CNS estrogenic signaling. We previously reported that spinal membrane aromatase (mAro) and membrane estrogen receptor α (mERα) oligomerize (1). Since their organizational relationship would likely influence functions of locally produced estrogens, we quantified the mAro and mERα that are physically associated and non-associated in two functionally different regions of rat CNS - spinal cord, which has predominantly neural functionalities, and hypothalamus, which has both neural and endocrine capabilities...
May 15, 2018: Endocrinology
https://www.readbyqxmd.com/read/29767762/surgical-outcomes-following-repeat-transsphenoidal-surgery-for-nonfunctional-pituitary-adenomas-a-retrospective-comparative-study
#9
Joshua Bakhsheshian, Sarah Wheeler, Ben A Strickland, Martin H Pham, Robert C Rennert, John Carmichael, Martin Weiss, Gabriel Zada
BACKGROUND: Endonasal transsphenoidal surgery (ETSS) remains the preferred treatment for recurrent or residual nonfunctional pituitary adenomas (NFPAs). However, surgical complications and outcomes with repeat ETSS are unclear. OBJECTIVE: To compare outcomes from primary and repeat ETSS in patients with NFPAs. METHODS: Retrospective review of ETSS for NFPAs at USC University Hospital and LAC + USC Medical Center between 2000 and 2015. Patients with ≥3-mo follow-up data were included...
May 15, 2018: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/29767287/screening-for-comorbid-conditions-in-patients-enrolled-in-the-soda-registry-a-2-year-observational-analysis
#10
Whitney W Woodmansee, Murray B Gordon, Mark E Molitch, Adriana G Ioachimescu, Don W Carver, Beloo Mirakhur, David Cox, Roberto Salvatori
PURPOSE: This 2-year analysis assessed frequency of comorbidities and comorbidity screening in the Somatuline® (lanreotide, LAN) Depot for Acromegaly (SODA) registry. METHODS: Patient data collected included pituitary hormone deficiencies, sleep studies, echocardiograms, gallbladder sonographies, colonoscopies, and glycated hemoglobin (HbA1c) levels. Insulin-like growth factor-1 (IGF-1) and growth hormone levels in patients with (DM) and without (non-DM) diabetes mellitus were analyzed...
May 16, 2018: Endocrine
https://www.readbyqxmd.com/read/29764029/-staged-transcranial-and-transsphenoidal-surgery-for-giant-pituitary-adenomas-a-retrospective-study-of-21-cases
#11
D Y Liao, Z Y Liu, J Zhang, Q Q Ren, X Y Liu, J G Xu
Objective: To investigate the effect of the second-stage transcranial and transsphenoidal approach for giant pituitary tumors. Methods: A retrospective review of 21 patients, who had undergone the transcranial surgery and then transsphenoidal surgery for giant pituitary adenomas from 2012 to 2015 in the neurosurgery department of West China Hospital, was performed. Visual findings, endocrine presentation, complications, and tumor types were collected. All data were based on clinical feature, MRI, and follow-up...
May 8, 2018: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/29763783/sex-differences-in-the-acth-and-cortisol-response-to-pharmacological-probes-are-stressor-specific-and-occur-regardless-of-alcohol-dependence-history
#12
Robert M Anthenelli, Jaimee L Heffner, Thomas J Blom, Belinda E Daniel, Benjamin S McKenna, Gary S Wand
Women and men differ in their risk for developing stress-related conditions such as alcohol use and anxiety disorders and there are gender differences in the typical sequence in which these disorders co-occur. However, the neural systems underlying these gender-biased psychopathologies and clinical course modifiers in humans are poorly understood and may involve both central and peripheral mechanisms regulating the limbic-hypothalamic-pituitary-adrenal axis. In the present randomized, double blind, placebo-controlled, triple-dummy crossover study, we juxtaposed a centrally-acting, citalopram (2 mg/unit BMI) neuroendocrine stimulation test with a peripherally-acting, dexamethasone (Dex) (1...
May 4, 2018: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/29757421/stereotactic-radiosurgery-for-acromegaly-an-international-multicenter-retrospective-cohort-study
#13
Dale Ding, Gautam U Mehta, Mohana Rao Patibandla, Cheng-Chia Lee, Roman Liscak, Hideyuki Kano, Fu-Yuan Pai, Mikulas Kosak, Nathaniel D Sisterson, Roberto Martinez-Alvarez, Nuria Martinez-Moreno, David Mathieu, Inga S Grills, Kevin Blas, Kuei Lee, Christopher P Cifarelli, Gennadiy A Katsevman, John Y K Lee, Brendan McShane, Douglas Kondziolka, L Dade Lunsford, Mary Lee Vance, Jason P Sheehan
BACKGROUND: Stereotactic radiosurgery (SRS) is a treatment option for persistent or recurrent acromegaly secondary to a growth hormone secreting pituitary adenoma, but its efficacy is inadequately defined. OBJECTIVE: To assess, in a multicenter, retrospective cohort study, the outcomes of SRS for acromegaly and determine predictors. METHODS: We pooled and analyzed data from 10 participating institutions of the International Gamma Knife Research Foundation for patients with acromegaly who underwent SRS with endocrine follow-up of ≥6 mo...
May 10, 2018: Neurosurgery
https://www.readbyqxmd.com/read/29757344/complex-integration-of-intrinsic-and-peripheral-signaling-is-required-for-pituitary-gland-development
#14
Whitney Edwards, Lori T Raetzman
The coordination of pituitary development is complicated and requires input from multiple cellular processes. Recent research has provided insight into key molecular determinants that govern cell fate specification in the pituitary. Moreover, increasing research aimed to identify, characterize and functionally describe the presumptive pituitary stem cell population has allowed for a better understanding of the processes that govern endocrine cell differentiation in the developing pituitary. The culmination of this research has led to the ability of investigators to recapitulate some of embryonic pituitary development in vitro, the first steps to developing novel regenerative therapies for pituitary diseases...
May 10, 2018: Biology of Reproduction
https://www.readbyqxmd.com/read/29756419/growth-hormone-and-aging-updated-review
#15
REVIEW
Andrzej Bartke
Role of growth hormone (GH) in mammalian aging is actively explored in clinical, epidemiological, and experimental studies. The age-related decline in GH levels is variously interpreted as a symptom of neuroendocrine aging, as one of causes of altered body composition and other unwelcome symptoms of aging, or as a mechanism of natural protection from cancer and other chronic diseases. Absence of GH signals due to mutations affecting anterior pituitary development, GH secretion, or GH receptors produces an impressive extension of longevity in laboratory mice...
May 11, 2018: World Journal of Men's Health
https://www.readbyqxmd.com/read/29755406/the-role-of-kiss1-neurons-as-integrators-of-endocrine-metabolic-and-environmental-factors-in-the-hypothalamic-pituitary-gonadal-axis
#16
REVIEW
Shel-Hwa Yeo, William H Colledge
Kisspeptin-GPR54 signaling in the hypothalamus is required for reproduction and fertility in mammals. Kiss1 neurons are key regulators of gonadotropin-releasing hormone (GnRH) release and modulation of the hypothalamic-pituitary-gonadal (HPG) axis. Arcuate Kiss1 neurons project to GnRH nerve terminals in the median eminence, orchestrating the pulsatile secretion of luteinizing hormone (LH) through the intricate interaction between GnRH pulse frequency and the pituitary gonadotrophs. Arcuate Kiss1 neurons, also known as KNDy neurons in rodents and ruminants because of their co-expression of neurokinin B and dynorphin represent an ideal hub to receive afferent inputs from other brain regions in response to physiological and environmental changes, which can regulate the HPG axis...
2018: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/29754643/pregnancy-in-patients-with-cushing-s-syndrome
#17
REVIEW
Marcio Carlos Machado, Maria Candida Barisson Vilares Fragoso, Marcello Delano Bronstein
Progress in diagnosis and treatment of endocrine diseases has made pregnancy possible for women with endocrinopathies, including Cushing's syndrome (CS). The risk of maternal-fetal complications in patients who are not biochemically controlled, however, is substantial. Therefore, the surgical and/or medical control of hypercortisolism is mandatory prior to conceiving. A diagnosis of de novo CS during gestation is difficult due to changes in the hypothalamic-pituitary-adrenal axis during pregnancy, which may lead to some clinical features suggestive of CS along with abnormal laboratory tests...
June 2018: Endocrinology and Metabolism Clinics of North America
https://www.readbyqxmd.com/read/29754636/outcomes-of-pituitary-radiation-for-cushing-s-disease
#18
REVIEW
Natasha Ironside, Ching-Jen Chen, Cheng-Chia Lee, Daniel M Trifiletti, Mary Lee Vance, Jason P Sheehan
Achievement of biochemical remission with preservation of normal pituitary function is the goal of treatment for Cushing's disease. For patients with persistent or recurrent Cushing's disease after transsphenoidal resection, radiation therapy may be a safe and effective treatment. Stereotactic radiosurgery is favored over conventional fractionated external beam radiation. Hormonal recurrence rates range from 0% to 36% at 8 years after treatment. Tumor control rates are high. New pituitary hormone deficiency is the most common adverse effect after stereotactic radiosurgery and external beam radiation...
June 2018: Endocrinology and Metabolism Clinics of North America
https://www.readbyqxmd.com/read/29753028/pituitary-somatolactotropes-evade-an-oncogenic-response-to-ras
#19
Allyson K Roof, Tammy Trudeau, Arthur Gutierrez-Hartmann
Distinct cell types have been shown to respond to activated Ras signaling in a cell-specific manner. In contrast to its pro-tumorigenic role in some human epithelial cancers, oncogenic Ras triggers differentiation of pheochromocytoma cells and medullary thyroid carcinoma cells. Furthermore, we have previously demonstrated that in pituitary somatolactotropes, activated Ras promotes differentiation and is not sufficient to drive tumorigenesis. These findings demonstrate that lactotrope cells have the ability to evade the tumorigenic fate that is often associated with persistent activation of Ras/ERK signaling, and suggest that there may be differential expression of inhibitory signaling molecules or negative cell cycle regulators that act as a brake to prevent the tumorigenic effects of sustained Ras signaling...
May 9, 2018: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/29752700/neuro-radiological-features-can-predict-hypopituitarism-in-primary-autoimmune-hypophysitis
#20
Tommaso Tartaglione, Sabrina Chiloiro, Maria Elena Laino, Antonella Giampietro, Simona Gaudino, Angelo Zoli, Antonio Bianchi, Alfredo Pontecorvi, Cesare Colosimo, Laura De Marinis
Primary autoimmune hypophysitis (PAH) is considered an underdiagnosed disease, due to the difficulty in reaching a definitive diagnosis. PAH clinical diagnosis remains an exclusion diagnosis. We aimed to correlate PAH neuro-radiological signs to endocrine features and evaluate their prognostic role. 24 PAH cases were enrolled and classified according to neuro-radiological signs: in 12 adeno-hypophysitis (AHs), 8 infundibulo-neuro-hypophysitis (INHs) and 4 pan-hypophysitis (PHs). Secondary hypogonadism developed more frequently in INHs as compared to AHs (54...
May 11, 2018: Pituitary
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