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Parathyroid hormone

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https://www.readbyqxmd.com/read/28732226/intermittent-administration-of-parathyroid-hormone-ameliorated-alveolar-bone-loss-in-experimental-periodontitis-in-streptozotocin-induced-diabetic-rats
#1
Helin Chen, Taozi Fu, Yuanyuan Ma, Xiangnan Wu, Xianxian Li, Xinyi Li, Jiefei Shen, Hang Wang
OBJECTIVE: Intermittent administration of parathyroid hormone (PTH) has been demonstrated to have anabolic effects on bone metabolism and is approved for use in the treatment of osteoporosis. This study evaluates the role of intermittent PTH administration on alveolar bone loss in streptozotocin (STZ)-induced diabetic rats. DESIGN: Fifty male Sprague Dawley rats were randomly divided into the following five groups: (1) a control group (saline placebo without ligature and STZ injection), (2) a PTH group (PTH administration without ligature and STZ injection), (3) an L group (saline placebo with ligature), (4) an L+STZ group (saline placebo with ligature and STZ injection), and (5) an L+STZ+PTH group (PTH administration with ligature and STZ injection)...
July 5, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/28730419/the-intriguing-connections-of-leptin-to-hyperparathyroidism
#2
REVIEW
Stergios A Polyzos, Leonidas Duntas, Jens Bollerslev
PURPOSE: Leptin has been implicated in bone metabolism, but the association with parathyroid gland function has not been fully clarified. This review aimed to summarize evidence of the association between leptin and hyperparathyroidism, both primary and secondary, elucidating the potential pathophysiologic and therapeutic consequences between leptin and parathyroid hormone, hopefully prompting the design of new studies. RESULTS: Experimental studies indicate a positive loop between leptin and parathyroid hormone in primary hyperparathyroidism...
July 20, 2017: Endocrine
https://www.readbyqxmd.com/read/28729033/metabolic-acidosis-is-common-and-associates-with-disease-progression-in-children-with-chronic-kidney-disease
#3
Jérôme Harambat, Kevin Kunzmann, Karolis Azukaitis, Aysun K Bayazit, Nur Canpolat, Anke Doyon, Ali Duzova, Anna Niemirska, Betul Sözeri, Daniela Thurn-Valsassina, Ali Anarat, Lucie Bessenay, Cengiz Candan, Amira Peco-Antic, Alev Yilmaz, Sibylle Tschumi, Sara Testa, Augustina Jankauskiene, Hakan Erdogan, Alejandra Rosales, Harika Alpay, Francesca Lugani, Klaus Arbeiter, Francesca Mencarelli, Aysel Kiyak, Osman Dönmez, Dorota Drozdz, Anette Melk, Uwe Querfeld, Franz Schaefer
Recent studies in adult chronic kidney disease (CKD) suggest that metabolic acidosis is associated with faster decline in estimated glomerular filtration rate (eGFR). Alkali therapies improve the course of kidney disease. Here we investigated the prevalence and determinants of abnormal serum bicarbonate values and whether metabolic acidosis may be deleterious to children with CKD. Associations between follow-up serum bicarbonate levels categorized as under 18, 18 to under 22, and 22 or more mmol/l and CKD outcomes in 704 children in the Cardiovascular Comorbidity in Children with CKD Study, a prospective cohort of pediatric patients with CKD stages 3-5, were studied...
July 17, 2017: Kidney International
https://www.readbyqxmd.com/read/28728874/profile-of-chronic-kidney-disease-related-mineral-bone-disorders-in-newly-diagnosed-advanced-predialysis-diabetic-kidney-disease-patients-a-hospital-based-cross-sectional-study
#4
S Ray, A M Beatrice, A Ghosh, S Pramanik, R Bhattacharjee, S Ghosh, A Raychaudhury, S Mukhopadhyay, S Chowdhury
AIM: Chronic kidney disease related-mineral bone disorder (CKD-MBD) has been poorly studied in pre-dialysis Indian CKD population. There are limited data on the pattern of these disturbances in diabetic CKD patients. Therefore, a study was conducted to find out the profile of mineral bone disorders in T2DM patients with pre-dialysis CKD. METHODS: In this cross-sectional design, diabetic patients with newly-diagnosed stage 4 and 5 CKD were evaluated. Serum levels of calcium, phosphorus, intact parathyroid hormone (iPTH), 25 hydroxy vitamin D and total alkaline phosphatase (ALP) were measured in all patients...
July 8, 2017: Diabetes & Metabolic Syndrome
https://www.readbyqxmd.com/read/28727763/loss-of-receptor-activity-modifying-protein-2-in-mice-causes-placental-dysfunction-and-alters-pth1r-regulation
#5
Mahita Kadmiel, Brooke C Matson, Scott T Espenschied, Patricia M Lenhart, Kathleen M Caron
Receptor activity-modifying protein 2 (Ramp2) is a single-pass transmembrane protein that heterodimerizes with several family B G-protein coupled receptors to alter their function. Ramp2 has been primarily characterized in association with calcitonin receptor-like receptor (Calcrl, CLR), forming the canonical receptor complex for the endocrine peptide adrenomedullin (Adm, AM). However, we previously demonstrated that Ramp2+/- female mice display a constellation of endocrine-related phenotypes that are distinct from those of Adm+/- and Calcrl+/- mice, implying that RAMP2 has physiological functions beyond its canonical complex...
2017: PloS One
https://www.readbyqxmd.com/read/28726185/raising-awareness-on-the-therapeutic-role-of-cholecalciferol-in-ckd-a-multidisciplinary-based-opinion
#6
REVIEW
Sandro Giannini, Sandro Mazzaferro, Salvatore Minisola, Luca De Nicola, Maurizio Rossini, Mario Cozzolino
Vitamin D is recognized to play an essential role in health and disease. In kidney disease, vitamin D analogs have gained recognition for their involvement and potential therapeutic importance. Nephrologists are aware of the use of oral native vitamin D supplementation, however, uncertainty still exists with regard to the use of this treatment option in chronic kidney disease as well as clinical settings related to chronic kidney disease, where vitamin D supplementation may be an appropriate therapeutic choice...
July 19, 2017: Endocrine
https://www.readbyqxmd.com/read/28726134/non-functioning-parathyroid-carcinoma-a-case-report
#7
Nobuyasu Suganuma, Hiroyuki Iwasaki, Satoru Shimizu, Tatsuya Yoshida, Takashi Yamanaka, Izumi Kojima, Haruhiko Yamazaki, Soji Toda, Hirotaka Nakayama, Katsuhiko Masudo, Yasushi Rino, Kae Kawachi, Yohei Miyagi, Akio Miyake, Kenichi Ohashi, Munetaka Masuda
BACKGROUND: Non-functioning parathyroid carcinoma is a rare disease that is difficult to distinguish from other diseases based on the lack of hyperparathyroidism. This is a report of non-functioning parathyroid carcinoma diagnosed by reverse transcription polymerase chain reaction (RT-PCR) targeting parathyroid hormone (PTH) messenger RNA. CASE PRESENTATION: The patient is a 67-year-old male who visited our hospital for the chief complaint of hoarseness. A 5-cm mass was observed in the right lobe of the thyroid gland, and poorly differentiated thyroid carcinoma was suspected according to the fine-needle biopsy results...
December 2017: Surgical Case Reports
https://www.readbyqxmd.com/read/28725317/prevalence-of-metabolic-syndrome-among-the-end-stage-renal-disease-patients-on-hemodialysis
#8
Khaled A Alswat, Awwadh Althobaiti, Khulod Alsaadi, Amaal Saeed Alkhaldi, Maryam Mutlaq Alharthi, Walaa Abduraheem Abuharba, Ahmed A Alzaidi
BACKGROUND: Patients with metabolic syndrome (MetS) have a 2.6-fold greater risk of incident chronic kidney disease (CKD). The primary goal of this study was to assess the prevalence of MetS in patients with end-stage renal disease (ESRD) who are on hemodialysis (HD) and the impact of MetS presence on HD-related outcomes. METHODS: This is a cross-sectional study conducted in the Dialysis Center, King Abdulaziz Specialist Hospital, Taif, Saudi Arabia. It was conducted among ESRD patients that attended the Dialysis Center between August 2013 and September 2016...
August 2017: Journal of Clinical Medicine Research
https://www.readbyqxmd.com/read/28724055/bone-turnover-after-bariatric-surgery
#9
Thalita Lima Melo, Leila Froeder, Leandro da Cunha Baia, Ita Pfeferman Heilberg
Objective: The aim of the present study was to evaluate parameters of bone and mineral metabolism after bariatric surgery. Subjects and methods: This sectional study included data from medical records from 61 bariatric surgery (BS) patients (minimum period of 6 months after the procedure) and from 30 class II and III obese patients as a control group (Cont), consisting of daily dietary intake of macronutrients, calcium and sodium, serum 25(OH)D and parathyroid hormone (PTH) and other biochemical serum and urinary parameters...
July 13, 2017: Archives of Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28723610/pediatric-reference-intervals-for-29-ortho-vitros-5600-immunoassays-using-the-caliper-cohort-of-healthy-children-and-adolescents
#10
Victoria Higgins, Angela W S Fung, Man Khun Chan, Joseph Macri, Khosrow Adeli
BACKGROUND: Accurate reference intervals (RIs) based on a healthy pediatric population are essential for pediatric test result interpretation. The CALIPER project has recruited a large healthy cohort and completed a series of a priori studies to address gaps in pediatric RIs. As immunoassays from different manufacturers for endocrine and special chemistry markers are not standardized and show marked intermethod differences, direct RI studies are needed for each major analytical platform...
July 19, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28721611/bone-targeting-parathyroid-hormone-conjugates-outperform-unmodified-pth-in-the-anabolic-treatment-of-osteoporosis-in-rats
#11
Yang Yang, Ali Aghazadeh-Habashi, Arash Panahifar, Yuchin Wu, Krishna H Bhandari, Michael R Doschak
Synthetic parathyroid hormone (PTH) is clinically indicated for the treatment of osteoporosis, through its anabolic effects on parathyroid hormone receptors (PTHRs), located on osteoblast cells. However, the bioavailability of PTH for bone cells is restricted by the short half-life of PTH and the widespread distribution of PTHRs in non-skeletal tissues. To impart affinity for mineralized bone surfaces, bisphosphonate (BP)-mediated PTH analogues were synthesized, characterized, and evaluated in vitro and in vivo...
July 18, 2017: Drug Delivery and Translational Research
https://www.readbyqxmd.com/read/28721141/impact-of-25-hydroxyvitamin-d-free-and-bioavailable-fractions-of-vitamin-d-and-vitamin-d-binding-protein-levels-on-metabolic-syndrome-components
#12
Marta Pelczyńska, Teresa Grzelak, Marcelina Sperling, Paweł Bogdański, Danuta Pupek-Musialik, Krystyna Czyżewska
INTRODUCTION: Various forms of vitamin D and factors involved in their metabolism can play a role in the etiopathogenesis of metabolic disorders. This paper aims to define the relationship between concentration of the hydroxylated form of vitamin D (25(OH)D), the fraction of free and bioavailable vitamin D, and of vitamin D binding protein (VDBP) levels on the one hand and the prevalence of metabolic syndrome components on the other. MATERIAL AND METHODS: The studies were conducted on 79 people, including 52 with metabolic syndrome (MetS+) and 27 without it (MetS-)...
June 2017: Archives of Medical Science: AMS
https://www.readbyqxmd.com/read/28720522/patients-with-non-ambulatory-cerebral-palsy-have-higher-sclerostin-levels-and-lower-bone-mineral-density-than-patients-with-ambulatory-cerebral-palsy
#13
Yoon-Kyum Shin, Young Kwon Yoon, Kyung Bae Chung, Yumie Rhee, Sung-Rae Cho
Bone loss is a serious clinical issue in patients with cerebral palsy (CP). Sclerostin has garnered interest as a key mechanosensor in osteocytes, leading to considerations of the therapeutic utilization of anti-sclerostin medications. This study was undertaken to determine associations among mechanical unloading, sclerostin levels, and bone imbalance in patients with CP. A total of 28 patients with CP participated in this cross-sectional study. The following measurements were taken: anthropometrics, clinical diagnosis of CP subtype and ambulatory status, bone mineral density (BMD) z-scores at the lumbar spine and hip, and blood biochemical markers, including sclerostin, parathyroid hormone (PTH), osteocalcin, C-terminal telopeptide, 25-hydroxyvitamin D, 1,25-dihydroxyvitamin D, creatinine, calcium, and phosphorus...
July 15, 2017: Bone
https://www.readbyqxmd.com/read/28719612/renal-osteodystrophy-in-the-obesity-era-is-metabolic-syndrome-relevant
#14
Janaina Da Silva Martins, João Henrique Castro, Nestor A Sainz Rueda, Luciene Machado Dos Reis, Vanda Jorgetti, Rosa Maria Affonso Moysés, Jacqueline Teixeira Caramori
BACKGROUND: Observational studies have shown a beneficial effect of obesity on bone health; however, most of those studies were not based on bone biopsies. Metabolic syndrome (MetS) could have an effect on bone remodeling. However, there are no data on the effects of MetS in the presence of renal osteodystrophy. OBJECTIVE: The aim of this study was to investigate associations between MetS and renal osteodystrophy using the bone histomorphometric turnover-mineralization-volume (TMV) classification...
2017: PloS One
https://www.readbyqxmd.com/read/28715881/comparison-of-bone-metabolism-based-on-the-different-ages-and-competition-levels-of-junior-and-high-school-female-rhythmic-gymnasts
#15
Taewoong Oh, Tatsuki Naka
PURPOSE: This study was to clarify the effect of age and competition level by measuring bone metabolism markers and bone mineral density measurements of junior high school and high school female rhythmic gymnasts, who restrict their diets to maintain a low body weight, while routinely undertaking long hours of high-intensity exercise, comparing the gymnasts based on their elite/non-elite. METHODS: The study investigated 7 junior high school and 12 high school female rhythmic gymnasts...
June 30, 2017: Journal of Exercise Nutrition & Biochemistry
https://www.readbyqxmd.com/read/28713236/modulation-of-calcitonin-parathyroid-hormone-and-thyroid-hormone-secretion-by-electrical-stimulation-of-sympathetic-and-parasympathetic-nerves-in-anesthetized-rats
#16
Harumi Hotta, Akiko Onda, Harue Suzuki, Philip Milliken, Arun Sridhar
The thyroid and parathyroid glands are dually innervated by sympathetic (cervical sympathetic trunk [CST]) and parasympathetic (superior laryngeal nerve [SLN]) nerve fibers. We examined the effects of electrical stimulation of efferent or afferent nerve fibers innervating the thyroid and parathyroid glands on the secretion of immunoreactive calcitonin (iCT), parathyroid hormone (iPTH), 3,3',5-triiodothyronine (iT3), and thyroxine (iT4) from the thyroid and parathyroid glands. In anesthetized and artificially ventilated rats, thyroid venous blood was collected...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28711905/the-prevalence-subtypes-and-associated-factors-of-hyperuricemia-in-lupus-nephritis-patients-at-chronic-kidney-disease-stages-1-3
#17
Simeng Liu, Yijun Gong, Hong Ren, Wen Zhang, Xiaonong Chen, Tong Zhou, Xiao Li, Nan Chen
There is a high prevalence of hyperuricemia (HUA) in the chronic kidney disease (CKD) population. However, there's a dearth of research on HUA's prevalence, subtypes, early detection, and treatment strategies of HUA in lupus nephritis (LN) patients. The aim of this study is to address these knowledge gaps. LN patients presenting to the Department of Nephrology at Shanghai Rui Jin Hospital from January 2011 to January 2016 were recruited. The effective sample size was derived using the power analysis. The demographic, clinical and laboratory characteristics of the LN patients with HUA were compared with those of patients without HUA...
July 6, 2017: Oncotarget
https://www.readbyqxmd.com/read/28711370/assessing-the-risk-of-hypercalcemic-crisis-in-patients-with-primary-hyperparathyroidism
#18
Andrew J Lowell, Norah M Bushman, Xing Wang, Yue Ma, Susan C Pitt, Rebecca S Sippel, David F Schneider, Reese W Randle
BACKGROUND: Hypercalcemic crisis (HC) is a potentially life-threatening manifestation of primary hyperparathyroidism (PHPT). This study aimed to identify patients with PHPT at greatest risk for developing HC. METHODS: This retrospective cohort study included patients with a preoperative calcium of at least 12 mg/dL undergoing initial parathyroidectomy for PHPT from 11/2000 to 03/2016. We compared those with HC, defined as needing hospitalization for hypercalcemia, to those without HC...
July 12, 2017: Journal of Surgical Research
https://www.readbyqxmd.com/read/28711070/female-adolescents-with-chronic-or-end-stage-kidney-disease-and-strategies-for-their-care
#19
Maria E Diaz-Gonzalez De Ferris, Ana Catalina Alvarez-Elías, Michael Ted Ferris, Mara Medeiros
The prevalence of chronic or end-stage kidney disease in pediatric girls is lower than in boys, however, girls have unique morbidities that can have great effect on their quality of life. For female adolescents, creatinine excretion peaks at approximately 14 years of age and is significantly less than males, owing to lower muscle mass. Females have higher nitric oxide activity, and estrogens may contribute to lower blood pressure. Females excrete less growth hormone during the prepubertal and pubertal years...
July 2017: Seminars in Nephrology
https://www.readbyqxmd.com/read/28708916/assessment-of-parathyroid-hormone-serum-level-as-a-predictor-for-bone-condition-around-dental-implants
#20
Piotr Hadrowicz, Joanna Hadrowicz, Marcin Kozakiewicz, Adam Gesing
PURPOSE: The aim of this prospective study was to evaluate parathyroid hormone serum level as a potential single factor of bone metabolism around dental implants. MATERIALS AND METHODS: Parathyroid hormone levels were measured before implantation. Intraoral digital radiographs were taken in standardized conditions in all cases: immediately after implantation, immediately after functional loading, and 3, 6, 9, 12, 18, and 24 months after functional loading. The next phase was to align all radiographs geometrically...
July 2017: International Journal of Oral & Maxillofacial Implants
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