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https://www.readbyqxmd.com/read/28710078/endocrinology-and-the-brain-corticotropin-releasing-hormone-signaling
#1
Carolina Inda, Natalia G Armando, Paula A Dos Santos Claro, Susana Silberstein
Corticotropin-releasing hormone (CRH) is a key player of basal and stress activated responses in the hypothalamic-pituitary-adrenal axis (HPA) and in extrahypothalamic circuits, where it functions as a neuromodulator to orchestrate humoral and behavioral adaptive responses to stress. This review describes molecular components and cellular mechanisms involved in CRH signaling downstream of its G protein-coupled receptors (GPCRs) CRHR1 and CRHR2, and summarizes recent findings that challenge the classical view of GPCR signaling, and impact on our understanding of CRHRs function...
July 14, 2017: Endocrine Connections
https://www.readbyqxmd.com/read/28707167/supportive-care-for-patients-undergoing-immunotherapy
#2
Bernardo Leon Rapoport, Ronwyn van Eeden, Vincent Sibaud, Joel B Epstein, Jean Klastersky, Matti Aapro, Devan Moodley
Immune checkpoint inhibitors, a new class of cancer therapeutic agents, play an important role in the management of melanoma, NSCLC, and other malignancies. A workshop organized by three MASCC Study Groups: Oral Care, Skin Toxicities, and Neutropenia, Infection, and Myelosuppression during the MASCC Annual Meeting held in Adelaide, Australia on 23-25 June, 2016 focused on the new class of anti-cancer therapeutic agents. Topics in the workshop included the mechanism of action and clinical uses of immune anti-CTL4 and anti-PD1 antibodies, checkpoint inhibitor toxicities, including skin adverse events, gastrointestinal toxicities, oral complications, pulmonary toxicities, and endocrinological and immune-related infections...
July 13, 2017: Supportive Care in Cancer: Official Journal of the Multinational Association of Supportive Care in Cancer
https://www.readbyqxmd.com/read/28698112/slow-aging-in-mammals-lessons-from-african-mole-rats-and-bats
#3
REVIEW
Philip Dammann
Traditionally, the main mammalian models used in aging research have been mice and rats, i.e. short-lived species that obviously lack effective maintenance mechanisms to keep their soma in a functional state for prolonged periods of time. It is doubtful that life-extending mechanisms identified only in such short-lived species adequately reflect the diversity of longevity pathways that have naturally evolved in mammals, or that they have much relevance for long-lived species such as humans. Therefore, some complementary, long-lived mammalian models have been introduced to aging research in the past 15-20 years, particularly naked mole-rats (and to a lesser extent also other mole-rats) and bats...
July 8, 2017: Seminars in Cell & Developmental Biology
https://www.readbyqxmd.com/read/28684892/the-adaptability-of-somatic-stem-cells-a-review
#4
REVIEW
Kenyon S Tweedell
Cell and tissue specific somatic stem cells develop as dynamic populations of precursor cells to discrete tissue and organ differentiation during embryonic and fetal stages and their potential evolves with development. Some of their progeny are sequestered into separate cell niches of tissues as adult somatic stem cells at various times during organ development and differentiation These are diverse cell populations of stem and progenitor cells that respond to homeostatic needs for cell and tissue maintenance and the cycling of differentiated cells for physiological/ endocrinological changes...
2017: Journal of Stem Cells & Regenerative Medicine
https://www.readbyqxmd.com/read/28649097/-aging-and-homeostasis-aging-of-skeletal-muscle
#5
Ruriko Suzuki, Yoshifumi Tamura
With aging, insulin resistance and sarcopenia in skeletal muscle are induced, resulting in skeletal muscle aging. It is suggested that the former is one of the reasons that mitochondrial function decreases with aging, and the latter is due to endocrinologic dysfunction, neurological mechanism, nutritional deficiency and inactivity such as waste are complicatedly involved. Also, as sarcopenia progresses, the amount of physical activity further decreases, and it is also assumed that insulin resistance and sarcopenia progress synergistically...
2017: Clinical Calcium
https://www.readbyqxmd.com/read/28642047/erectile-dysfunction-in-young-men-a-review-of-the-prevalence-and-risk-factors
#6
REVIEW
Hoang Minh Tue Nguyen, Andrew T Gabrielson, Wayne J G Hellstrom
INTRODUCTION: Erectile dysfunction (ED) is an important health concern that can significantly affect a man's psychosocial well-being. ED has traditionally been considered a disease of old age; however, contemporary evidence suggests a growing incidence of ED in men younger than 40 years. The process of achieving an erection is multifaceted; there are many potential mechanisms that can be disrupted. It is critical to identify the specific causes of ED before proceeding with potentially costly and invasive therapeutic options...
June 19, 2017: Sexual Medicine Reviews
https://www.readbyqxmd.com/read/28637857/acute-peaks-of-testosterone-suppress-paternal-care-evidence-from-individual-hormonal-reaction-norms
#7
Wolfgang Goymann, Pamela Flores Dávila
A long-standing tenet of evolutionary endocrinology states that testosterone mediates the life-history trade-off between mating and paternal care. However, the support for a role of testosterone in suppressing paternal care is mixed: implantation studies in birds suggest that high-level testosterone implants suppress paternal care, but circulating levels of testosterone and paternal care are typically not correlated. Because any trade-off in real life must be realized with hormone levels that are within an individual's reaction norm, it is crucial to show that natural changes in the hormone can modulate behaviour...
June 28, 2017: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/28611019/mechanisms-in-endocrinology-aberrations-of-the-x-chromosome-as-cause-of-male-infertility
#8
Albrecht Röpke, Frank Tüttelmann
Male infertility is most commonly caused by spermatogenetic failure, clinically noted as oligo- or azoospermia. Today, in approximately 20% of azoospermic patients, a causal genetic defect can be identified. The most frequent genetic causes of azoospermia (or severe oligozoospermia) are Klinefelter syndrome (47,XXY), structural chromosomal abnormalities and Y-chromosomal microdeletions. Consistently with Ohno's law, the human X chromosome is the most stable of all the chromosomes, but contrary to Ohno's law, the X chromosome is loaded with regions of acquired, rapidly evolving genes, which are of special interest because they are predominantly expressed in the testis...
June 13, 2017: European Journal of Endocrinology
https://www.readbyqxmd.com/read/28603206/clinical-practice-and-mechanism-of-endocrinological-adverse-events-associated-with-immune-checkpoint-inhibitors
#9
Shintaro Iwama, Hiroshi Arima
  Immune checkpoint inhibitors, used for cancer immunotherapy, show anti-tumor effects through T cell activations. Monoclonal antibodies against cytotoxic T lymphocyte antigen-4 (CTLA-4), programmed cell death (PD)-1, or PD-ligand 1 which is a ligand of PD-1 have been shown to be effective in the treatments of advanced cancers including malignant melanoma, non-small cell lung cancer, and renal cell carcinoma. However, these drugs also have immune-related adverse events (irAEs). The irAEs, which have unique characteristics different from those seen in conventional cytotoxic anti-tumor medicines, are observed in the several tissues such as skin, gastrointestinal tract, liver, lung, muscle, nerve and endocrine systems...
2017: Nihon Rinshō Men'eki Gakkai Kaishi, Japanese Journal of Clinical Immunology
https://www.readbyqxmd.com/read/28566439/mechanisms-in-endocrinology-the-sexually-dimorphic-role-of-androgens-in-human-metabolic-disease
#10
REVIEW
Lina Schiffer, Punith Kempegowda, Wiebke Arlt, Michael W O'Reilly
Female androgen excess and male androgen deficiency manifest with an overlapping adverse metabolic phenotype, including abdominal obesity, insulin resistance, type 2 diabetes mellitus, non-alcoholic fatty liver disease and an increased risk of cardiovascular disease. Here, we review the impact of androgens on metabolic target tissues in an attempt to unravel the complex mechanistic links with metabolic dysfunction; we also evaluate clinical studies examining the associations between metabolic disease and disorders of androgen metabolism in men and women...
September 2017: European Journal of Endocrinology
https://www.readbyqxmd.com/read/28538228/glycemic-control-in-the-treatment-of-psoriasis
#11
Wilfred Ip, Mark G Kirchhof
Psoriasis is a common chronic inflammatory skin disease that manifests as scaly erythematous plaques as a consequence of keratinocyte hyperproliferation and inflammation. It is commonly associated with diabetes, obesity, and the metabolic syndrome. While there are numerous approved treatment options available, they have limitations including availability, toxicities such as immunosuppression, and high cost. There is increasing evidence to suggest that several hypoglycemic agents used in the treatment of type 2 diabetes, including glucagon-like peptide-1 receptor agonists, dipeptidyl peptidase-4 inhibitors, thiazolidinediones and biguanides, exert beneficial effects in psoriasis...
2017: Dermatology: International Journal for Clinical and Investigative Dermatology
https://www.readbyqxmd.com/read/28487297/mechanisms-in-endocrinology-towards-the-clinical-translation-of-stem-cell-therapy-for-type-1-diabetes
#12
Daniel Espes, Joey Lau Börjesson, Per-Ola Carlsson
Insulin producing cells derived from human embryonic stem cells (hESCs) or induced pluripotent stem cells (iPSCs) have for long been a promising, but elusive treatment far from clinical translation into type 1 diabetes therapy. However, the field is now on the verge of moving such insulin-producing cells into clinical trials. Although stem cell therapies provide great opportunities, there are also potential risks such as teratoma formation associated with the treatment. Many considerations are needed on how to proceed with clinical translation, including whether to use hESCs or iPSCs, and whether encapsulation of tissue will be needed...
May 9, 2017: European Journal of Endocrinology
https://www.readbyqxmd.com/read/28450305/mechanisms-in-endocrinology-update-on-pathogenesis-of-primary-adrenal-insufficiency-beyond-steroid-enzyme-deficiency-and-autoimmune-adrenal-destruction
#13
Christa Flueck
Primary adrenal insufficiency (PAI) is potentially life threatening, but rare. In children genetic defects prevail, while adults suffer mostly from acquired forms. The spectrum of genetic defects has increased in recent years with the use of next generation sequencing methods and reaches now far beyond genetic defects in known enzymes of steroidogenesis. Cofactor disorders such as P450 oxidoreductase (POR) deficiency manifesting as a complex form of congenital adrenal hyperplasia with a broad clinical phenotype have come to the forth...
April 27, 2017: European Journal of Endocrinology
https://www.readbyqxmd.com/read/28428227/mechanisms-in-endocrinology-the-multiple-facets-of-ghrh-gh-igf-i-axis-lessons-from-lifetime-untreated-isolated-gh-deficiency-due-to-a-ghrh-receptor-gene-mutation
#14
REVIEW
Manuel H Aguiar-Oliveira, Anita H O Souza, Carla R P Oliveira, Viviane C Campos, Luíz A Oliveira-Neto, Roberto Salvatori
Twenty years ago, we described kindred of 105 individuals with isolated GH deficiency (IGHD) in Itabaianinha County, in northeast Brazil, carrying a homozygous mutation in the GH-releasing hormone receptor gene. These subjects exhibit markedly reduced GH responsiveness to stimulatory tests, and anterior pituitary hypoplasia. Serum concentrations of IGF-I, IGF binding protein type 3 and the acid-labile subunit are markedly reduced, with a lesser reduction of IGF-II. The most striking physical findings of these IGHD individuals are the proportionate short stature, doll facies, high-pitched voice and visceral obesity with reduced fat-free mass...
August 2017: European Journal of Endocrinology
https://www.readbyqxmd.com/read/28426724/cloning-retinoid-and-peroxisome-proliferator-activated-nuclear-receptors-of-the-pacific-oyster-and-in-silico-binding-to-environmental-chemicals
#15
Susanne Vogeler, Tamara S Galloway, Michail Isupov, Tim P Bean
Disruption of nuclear receptors, a transcription factor superfamily regulating gene expression in animals, is one proposed mechanism through which pollution causes effects in aquatic invertebrates. Environmental pollutants have the ability to interfere with the receptor's functions through direct binding and inducing incorrect signals. Limited knowledge of invertebrate endocrinology and molecular regulatory mechanisms, however, impede the understanding of endocrine disruptive effects in many aquatic invertebrate species...
2017: PloS One
https://www.readbyqxmd.com/read/28403787/role-of-tissue-renin-angiotensin-system-and-the-chymase-angiotensin-1-12-axis-in-the-pathogenesis-of-diabetic-retinopathy
#16
Mohammad Shamsul Ola, Abdullah S Alhomida, Carlos M Ferrario, Sarfaraz Ahmad
Diabetic retinopathy (DR) is a major diabetes complication and the leading cause for vision loss and blindness in the adult human population. Diabetes, being an endocrinological disorder dysregulate a number of hormonal systems including the renin angiotensin system (RAS), which thereby may damage both vascular and neuronal cells in the retina. Angiotensin II (Ang II), an active component of the RAS is increased in diabetic retina, and may play a significant role in neurovascular damage leading to the progression of DR...
April 7, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28381451/mechanisms-in-endocrinology-genetic-regulation-of-bone-formation-from-monogenic-to-complex-bone-disorders
#17
Eveline Boudin, Wim Van Hul
Throughout life, bone is continuously remodelled to be able to fulfil its multiple functions. The importance of strictly regulating the bone remodelling process, which is defined by the sequential actions of osteoclasts and osteoblasts, is shown by a variety of disorders with abnormalities in bone mass and strength. The best known and most common example of such a disorder is osteoporosis which is marked by a decreased bone mass and strength that consequently results in an increased fracture risk. As osteoporosis is a serious health problem, a large amount of studies focusses on elucidating the aetiology of the disease as well as on the identification of novel therapeutic targets for the treatment of osteoporotic patients...
April 5, 2017: European Journal of Endocrinology
https://www.readbyqxmd.com/read/28377377/mechanisms-in-endocrinology-neurodevelopmental-disorders-in-children-born-to-mothers-with-thyroid-dysfunction-evidence-of-fetal-programming
#18
REVIEW
Stine Linding Andersen, Allan Carlé, Jesper Karmisholt, Inge Bülow Pedersen, Stig Andersen
Fetal programming is a long-standing, but still evolving, concept that links exposures during pregnancy to the later development of disease in the offspring. A fetal programming effect has been considered within different endocrine axes and in relation to different maternal endocrine diseases. In this critical review, we describe and discuss the hypothesis of fetal programming by maternal thyroid dysfunction in the context of fetal brain development and neurodevelopmental disorders in the offspring. Thyroid hormones are important regulators of early brain development, and evidence from experimental and observational human studies have demonstrated structural and functional abnormalities in the brain caused by the lack or excess of thyroid hormone during fetal brain development...
July 2017: European Journal of Endocrinology
https://www.readbyqxmd.com/read/28272006/solitary-metastasis-of-clear-renal-cell-carcinoma-to-thyroid-gland-three-reported-cases-with-review-of-the-literature
#19
Jaromir Astl, Abdulrahman Ali Bahannan, Jaroslava Dušková, Z Novák, P Vlcek, Jan Betka
Metastasis to the head and neck and more specifically to the thyroid gland from distant primary tumors is less common in comparison to the local regional metastasis of squamous cell carcinomas of the upper aero-digestive tract. Preoperative diagnosis of these cases can be difficult. The authors present three cases with distant solitary metastases of clear renal cell carcinoma to the thyroid gland with ambiguous mechanism of tumor spread to the thyroid. Solitary metastases of clear renal cell carcinomas are an uncommon variant of metastasis of this tumor and may imitate thyroid well differentiated carcinoma which most commonly affects the thyroid gland...
January 2017: Gulf Journal of Oncology
https://www.readbyqxmd.com/read/28264815/mechanisms-in-endocrinology-aging-and-anti-aging-a-combo-endocrinology-overview
#20
REVIEW
Evanthia Diamanti-Kandarakis, Maurizio Dattilo, Djuro Macut, Leonidas Duntas, Efstathios S Gonos, Dimitrios G Goulis, Christina Kanaka Gantenbein, Marianna Kapetanou, Eftychia Koukkou, Irene Lambrinoudaki, Marina Michalaki, Shahla Eftekhari-Nader, Renato Pasquali, Melpomeni Peppa, Marinella Tzanela, Evangeline Vassilatou, Andromachi Vryonidou
Aging and its underlying pathophysiological background has always attracted the attention of the scientific society. Defined as the gradual, time-dependent, heterogeneous decline of physiological functions, aging is orchestrated by a plethora of molecular mechanisms, which vividly interact to alter body homeostasis. The ability of an organism to adjust to these alterations, in conjunction with the dynamic effect of various environmental stimuli across lifespan, promotes longevity, frailty or disease. Endocrine function undergoes major changes during aging, as well...
June 2017: European Journal of Endocrinology
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