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Reviews in Endocrine & Metabolic Disorders

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https://www.readbyqxmd.com/read/28916903/merkel-cell-carcinoma-epidemiology-pathogenesis-diagnosis-and-therapy
#1
REVIEW
Teresa Amaral, Ulrike Leiter, Claus Garbe
Merkel cell carcinoma (MCC) is a rare and aggressive skin cancer with a neuroendocrine phenotype. Incidence varies according to the geographic regions but is overall increasing. Different risk factors have been identified namely advanced age, immunosuppression, and ultraviolet light exposure. An association between MCC and polyomavirus infection is known. However, the exact mechanism that leads to carcinogenesis is yet to be fully understood. Surgery when feasible is the recommended treatment for localized disease, followed by adjuvant radiation or chemoradiation...
September 16, 2017: Reviews in Endocrine & Metabolic Disorders
https://www.readbyqxmd.com/read/28890993/chemotherapy-in-nets-when-and-how
#2
REVIEW
Anna Angelousi, Gregory Kaltsas, Anna Koumarianou, Martin O Weickert, Ashley Grossman
The majority of neuroendocrine tumours (NETs) are well-differentiated tumours that follow an indolent course, in contrast to a minority of poorly differentiated neuroendocrine carcinomas (NECs) which exhibit an aggressive course and assocaited with an overall short survival. Although surgery is the only curative treatment for NETs it is not always feasible,necessitating the application of other therapies including chemotherapy. Streptozotocin (STZ)-based regimens have long been used for advanced or metastatic well-to-moderately differentiated (G1-G2) NETs, especially those originating from the pancreas (pNETs)...
September 11, 2017: Reviews in Endocrine & Metabolic Disorders
https://www.readbyqxmd.com/read/28871510/cyto-histology-in-net-what-is-necessary-today-and-what-is-the-future
#3
REVIEW
Frediano Inzani, Gianluigi Petrone, Guido Fadda, Guido Rindi
The carcinoid as originally described is part of the relatively large family of neuroendocrine neoplasia found in almost every organ. Historical reasons back their current definitions. Neuroendocrine cancer is most frequently observed in the lung and the digestive tract. In the lung is defined as carcinoid (typical and atypical) for well differentiated, low to intermediate grade, and small cell and large cell neuroendocrine carcinoma for poorly differentiated, high grade. In the digestive system are respectively defined as neuroendocrine tumor (NET) and neuroendocrine carcinoma (NEC) of small and large cell types...
September 5, 2017: Reviews in Endocrine & Metabolic Disorders
https://www.readbyqxmd.com/read/28868578/management-of-pulmonary-neuroendocrine-tumors
#4
REVIEW
Robert A Ramirez, Aman Chauhan, Juan Gimenez, Katharine E H Thomas, Ioni Kokodis, Brianne A Voros
Neuroendocrine tumors (NETs) of the lung are divided into 4 major types: small cell lung cancer (SCLC), large cell neuroendocrine carcinoma (LCNEC), atypical carcinoid (AC) or typical carcinoid (TC). Each classification has distinctly different treatment paradigms, making an accurate initial diagnosis essential. The inconsistent clinical presentation of this disease, however, makes this difficult. The objective of this manuscript is to detail the diagnosis and management of the well differentiated pulmonary carcinoid (PC) tumors...
September 4, 2017: Reviews in Endocrine & Metabolic Disorders
https://www.readbyqxmd.com/read/28667465/the-role-of-vitamin-d-in-male-fertility-a-focus-on-the-testis
#5
REVIEW
Cristina de Angelis, Mariano Galdiero, Claudia Pivonello, Francesco Garifalos, Davide Menafra, Federica Cariati, Ciro Salzano, Giacomo Galdiero, Mariangela Piscopo, Alfonso Vece, Annamaria Colao, Rosario Pivonello
In the last decade, vitamin D has emerged as a pleiotropic molecule with a multitude of autocrine, paracrine and endocrine functions, mediated by classical genomic as well as non-classical non-genomic actions, on multiple target organs and systems. The expression of vitamin D receptor and vitamin D metabolizing enzymes in male reproductive system, particularly in the testis, suggests the occurrence of vitamin D synthesis and regulation as well as function in the testis. The role of vitamin D in the modulation of testis functions, including hormone production and spermatogenesis, has been investigated in animals and humans...
September 2017: Reviews in Endocrine & Metabolic Disorders
https://www.readbyqxmd.com/read/28281103/current-evidence-on-vitamin-d-deficiency-and-kidney-transplant-what-s-new
#6
REVIEW
Gerardo Sarno, Riccardo Nappi, Barbara Altieri, Giacomo Tirabassi, Emanuele Muscogiuri, Gianmaria Salvio, Stavroula A Paschou, Aristide Ferrara, Enrico Russo, Daniela Vicedomini, Cerbone Vincenzo, Andromachi Vryonidou, Silvia Della Casa, Giancarlo Balercia, Francesco Orio, Paride De Rosa
Kidney transplant is the treatment of choice for end-stage chronic kidney disease. Kidneys generate 1,25-dihydroxyvitamin D (calcitriol) from 25-hydroxyvitamin D (calcidiol) for circulation in the blood to regulate calcium levels. Transplant patients with low calcidiol levels have an increased risk of metabolic and endocrine problems, cardiovascular disease, type 2 diabetes mellitus, poor graft survival, bone disorders, cancer, and mortality rate. The recommended calcidiol level after transplant is at least 30 ng/mL (75 nmol/L), which could require 1000-3000 IU/d vitamin D3 to achieve...
September 2017: Reviews in Endocrine & Metabolic Disorders
https://www.readbyqxmd.com/read/28214921/vitamin-d-administration-during-pregnancy-as-prevention-for-pregnancy-neonatal-and-postnatal-complications
#7
REVIEW
Carol L Wagner, Bruce W Hollis, Kalliopi Kotsa, Hana Fakhoury, Spyridon N Karras
Pregnancy represents a time of rapid bodily change, which includes physical proportions, physiology and responsibility. At this context, maternal vitamin D stores have been the objective of extensive scientific research during the last decades, focusing on their potential effects on maternal an neonatal health. A growing body of observational studies indicated that maternal hypovitaminosis D (as defined by maternal 25-hydroxyvitamin D [25(OH)D] levels <20 ng/ml or <50 nmol/l) is a significant risk factor for adverse neonatal outcomes including asthma, multiple sclerosis and other neurological disorders...
September 2017: Reviews in Endocrine & Metabolic Disorders
https://www.readbyqxmd.com/read/28102491/shedding-new-light-on-female-fertility-the-role-of-vitamin-d
#8
REVIEW
Giovanna Muscogiuri, Barbara Altieri, Cristina de Angelis, Stefano Palomba, Rosario Pivonello, Annamaria Colao, Francesco Orio
In the last decades several studies suggested that vitamin D is involved in the modulation of the reproductive process in women due to the expression of VDR and 1α-hydroxylase in reproductive tissues such as ovary, uterus, placenta, pituitary and hypothalamus. Vitamin D has also a role in the regulation of sex hormone steroidogenesis. Increasing evidence suggests that vitamin D might have a regulatory role in polycystic ovary syndrome (PCOS)-associated symptoms, including ovulatory dysfunction, insulin resistance and hyperandrogenism...
September 2017: Reviews in Endocrine & Metabolic Disorders
https://www.readbyqxmd.com/read/28092021/sunshine-vitamin-and-thyroid
#9
REVIEW
Immacolata Cristina Nettore, Luigi Albano, Paola Ungaro, Annamaria Colao, Paolo Emidio Macchia
Vitamin D exerts its canonical roles on the musculoskeletal system and in the calcium/phosphorus homeostasis. In the last years, increasing evidences suggested several extra-skeletal actions of this hormone, indicating that vitamin D may produce effects in almost all the body tissues. These are mediated by the presence of vitamin D receptor (VDR) and thanks to the presence of the 1-α-hydroxylase, the protein that converts the 25-hydroxyvitamin (calcidiol) to the active form 1,25-dihydroxyvitamin (calcitriol)...
September 2017: Reviews in Endocrine & Metabolic Disorders
https://www.readbyqxmd.com/read/28070798/does-vitamin-d-play-a-role-in-autoimmune-endocrine-disorders-a-proof-of-concept
#10
REVIEW
Barbara Altieri, Giovanna Muscogiuri, Luigi Barrea, Chantal Mathieu, Carla V Vallone, Luca Mascitelli, Giorgia Bizzaro, Vincenzo M Altieri, Giacomo Tirabassi, Giancarlo Balercia, Silvia Savastano, Nicola Bizzaro, Cristina L Ronchi, Annamaria Colao, Alfredo Pontecorvi, Silvia Della Casa
In the last few years, more attention has been given to the "non-calcemic" effect of vitamin D. Several observational studies and meta-analyses demonstrated an association between circulating levels of vitamin D and outcome of many common diseases, including endocrine diseases, chronic diseases, cancer progression, and autoimmune diseases. In particular, cells of the immune system (B cells, T cells, and antigen presenting cells), due to the expression of 1α-hydroxylase (CYP27B1), are able to synthesize the active metabolite of vitamin D, which shows immunomodulatory properties...
September 2017: Reviews in Endocrine & Metabolic Disorders
https://www.readbyqxmd.com/read/28032296/vitamin-d-musculoskeletal-health
#11
REVIEW
Harjit Pal Bhattoa, Jerzy Konstantynowicz, Natalia Laszcz, Marek Wojcik, Pawel Pludowski
Perhaps the role of Vitamin D supplementation has been most exhaustively studied in calcium absorption, skeletal wellbeing, muscular potency, balance and risk of falling. Nonetheless, new data has emerged and the recent research on sarcopenia makes the topic increasingly interesting. Given the socioeconomic burden of the musculoskeletal consequences of hypovitaminosis D it is vital to keep abreast with the latest literature in the field. The recommended Vitamin D supplementation dose should suffice to increase the serum 25 hydroxyvitamin D level to 30 ng/mL (75 nmol/L) and this level should be optimally maintained with a maintenance dose, particularly for those diagnosed with osteoporosis...
September 2017: Reviews in Endocrine & Metabolic Disorders
https://www.readbyqxmd.com/read/27761790/adrenal-disorders-is-there-any-role-for-vitamin-d
#12
REVIEW
Giacomo Tirabassi, Gianmaria Salvio, Barbara Altieri, Cristina L Ronchi, Silvia Della Casa, Alfredo Pontecorvi, Giancarlo Balercia
An emerging branch of research is examining the linkage between Vitamin D and nonskeletal disorders, including endocrine diseases. In this regard, a still little studied aspect concerns the involvement of vitamin D in adrenal gland disorders. Adrenal gland disorders, which might be theoretically affected by vitamin D unbalance, include adrenal insufficiency, Cushing's syndrome, adrenocortical tumors and hyperaldosteronism. In this review, we provide an updated document, which tries to collect and discuss the limited evidence to be found in the literature about the relationship between vitamin D and adrenal disorders...
September 2017: Reviews in Endocrine & Metabolic Disorders
https://www.readbyqxmd.com/read/28551827/new-light-on-an-old-vitamin-the-role-of-the-sunshine-vitamin-d-in-chronic-disease
#13
EDITORIAL
Christian A Koch
No abstract text is available yet for this article.
June 2017: Reviews in Endocrine & Metabolic Disorders
https://www.readbyqxmd.com/read/28516265/the-vitamin-d-deficiency-pandemic-approaches-for-diagnosis-treatment-and-prevention
#14
REVIEW
Michael F Holick
Vitamin D deficiency and insufficiency is a global health issue that afflicts more than one billion children and adults worldwide. The consequences of vitamin D deficiency cannot be under estimated. There has been an association of vitamin D deficiency with a myriad of acute and chronic illnesses including preeclampsia, childhood dental caries, periodontitis, autoimmune disorders, infectious diseases, cardiovascular disease, deadly cancers, type 2 diabetes and neurological disorders. This review is to put into perspective the controversy surrounding the definition for vitamin D deficiency and insufficiency as well as providing guidance for how to treat and prevent vitamin D deficiency...
June 2017: Reviews in Endocrine & Metabolic Disorders
https://www.readbyqxmd.com/read/28451877/vitamin-d-concentrations-cardiovascular-risk-and-events-a-review-of-epidemiological-evidence
#15
REVIEW
Martin Robert Grübler, Winfried März, Stefan Pilz, Tanja B Grammer, Christian Trummer, Christian Müllner, Verena Schwetz, Marlene Pandis, Nicolas Verheyen, Andreas Tomaschitz, Antonella Fiordelisi, Daniela Laudisio, Ersilia Cipolletta, Guido Iaccarino
Vitamin D has long been established as an elemental factor of bone physiology. Beyond mineral metabolism, the expression of the vitamin D receptor has been identified throughout the cardiovascular (CV) system. Experimental studies showed beneficial effects of vitamin D on heart and vessels, but vitamin D intoxication in animals also led to hypercalcemia and vascular calcification. Our knowledge has been extended by epidemiological studies that showed that 25-hydroxyvitamin D (25(OH)D) levels are inversely associated with an increased CV risk itself, but also with established CV risk factors, such as arterial hypertension, endothelial dysfunction and atherosclerosis...
June 2017: Reviews in Endocrine & Metabolic Disorders
https://www.readbyqxmd.com/read/28229265/low-vitamin-d-status-and-obesity-role-of-nutritionist
#16
REVIEW
Silvia Savastano, Luigi Barrea, Maria Cristina Savanelli, Francesca Nappi, Carolina Di Somma, Francesco Orio, Annamaria Colao
Low vitamin D status and obesity have concomitantly reached epidemic levels worldwide. Up to now the direction of the association between low vitamin D status and obesity, the exact mechanisms responsible for this association and the clinical usefulness to increase vitamin D status for reducing adiposity still warrant further evaluation. The aim of the present review was to examine the current evidence linking low vitamin D status and obesity in relation to the role of the nutritionist. On the one side, considering obesity as a causal factor, low sun exposure in obese individuals due to their sedentary lifestyle and less outdoor activity, vitamin D sequestration in adipose tissue, and volumetric dilution of ingested or cutaneously synthesized vitamin D3 in the large fat mass of obese patients, might represent some of the factors playing a major role in the pathogenesis of the low vitamin D status...
June 2017: Reviews in Endocrine & Metabolic Disorders
https://www.readbyqxmd.com/read/28213657/the-roles-of-uvb-and-vitamin-d-in-reducing-risk-of-cancer-incidence-and-mortality-a-review-of-the-epidemiology-clinical-trials-and-mechanisms
#17
REVIEW
Meis Moukayed, William B Grant
Global cancer incidence and mortality rates are high and increasing. Thus, it is imperative to find novel solutions to preventing cancer incidence and treating it at an affordable yet efficacious manner. The solar UVB-vitamin D-cancer hypothesis was first proposed in 1980 based on a geographical ecological study. Since then, numerous ecological and observational studies as well as studies of mechanisms have provided support for the hypothesis. However, observational studies have not provided consistent support, in part due to using a single blood draw from any season to use for serum 25-hydroxyvitamin D [25(OH)D] concentration in prospective studies with long follow-up times...
June 2017: Reviews in Endocrine & Metabolic Disorders
https://www.readbyqxmd.com/read/28176237/vitamin-d-and-its-role-in-psoriasis-an-overview-of-the-dermatologist-and-nutritionist
#18
REVIEW
Luigi Barrea, Maria Cristina Savanelli, Carolina Di Somma, Maddalena Napolitano, Matteo Megna, Annamaria Colao, Silvia Savastano
Psoriasis is a chronic immune-mediated inflammatory skin disease. Psoriasis lesions are characterized by hyper-proliferation of epidermal keratinocytes associated with inflammatory cellular infiltrate in both dermis and epidermis. The epidermis is the natural source of vitamin D synthesis by sunlight action. Recently, a role for vitamin D in the pathogenesis of different skin diseases, including psoriasis, has been reported. Indeed, significant associations between low vitamin D status and psoriasis have been systematically observed...
June 2017: Reviews in Endocrine & Metabolic Disorders
https://www.readbyqxmd.com/read/28062940/vitamin-d-and-diabetes-mellitus-causal-or-casual-association
#19
REVIEW
M Grammatiki, E Rapti, S Karras, R A Ajjan, Kalliopi Kotsa
The incidence of both type 2 and type 1 diabetes mellitus has been increasing worldwide. Vitamin D deficiency, or the awareness of its prevalence, has also been increasing. Vitamin D may have a role in the pathogenic mechanisms predisposing to type 2 diabetes by modulating insulin resistance and/or pancreatic β-cell function. Vitamin D status or elements involved in its activation or transport may also be involved in the development of type 1 diabetes mellitus through immunomodulatory role . Based on these observations a potential association between vitamin D and diabetes has been hypothesized...
June 2017: Reviews in Endocrine & Metabolic Disorders
https://www.readbyqxmd.com/read/27645613/low-serum-vitamin-d-status-air-pollution-and-obesity-a-dangerous-liaison
#20
REVIEW
Luigi Barrea, Silvia Savastano, Carolina Di Somma, Maria Cristina Savanelli, Francesca Nappi, Lidia Albanese, Francesco Orio, Annamaria Colao
The aim of this review is to provide a general overview of the possible associations among the vitamin D status, air pollution and obesity. Sunlight exposure accounts in humans for more than 90 % of the production of vitamin D. Among emerging factors influencing sunlight-induced synthesis of vitamin D, prospective and observational studies proved that air pollution constitutes an independent risk factor in the pathogenesis of vitamin D hypovitaminosis. In addition, environmental pollutants can affect risk of obesity when inhaled, in combination with unhealthy diet and lifestyle...
June 2017: Reviews in Endocrine & Metabolic Disorders
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