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Parathyroid hormone related

Qian Zhang, Le Wang, Hongbing Zeng, Yongman Lv, Yi Huang
BACKGROUND: Pulmonary hypertension (PH) is a rare disease often associated with high mortality and is recently recognized as a common complication secondary to chronic kidney disease (CKD). Epidemiological data for this disorder across the spectrum of CKD is poorly understood. METHODS: We retrospectively analyzed 705 CKD patients with complete clinical records from July 2013 to September 2015. All the patients were estimated by echocardiography and PH was defined as pulmonary artery systolic pressure (PASP) > 35 mmHg...
March 20, 2018: BMC Nephrology
Kenji Yorita, Kazuya Tsuji, Yoko Takano, Naoto Kuroda, Kei Sakamoto, Kaoru Arii, Yukio Yoshimoto, Kimiko Nakatani, Satoshi Ito
BACKGROUND: Acantholytic squamous cell carcinoma (ASQCC), histologically characterized by intercellular bridge loosening, is recognized as a rare variant of squamous cell carcinoma (SQCC). ASQCC may demonstrate a worse prognosis than conventional SQCC. Pulmonary ASQCC is particularly rare; its biological behavior and prognostic data have not been reported. CASE PRESENTATION: We report the clinical and autopsy findings of a 71-year-old Japanese man with pulmonary ASQCC...
March 16, 2018: BMC Cancer
Ji-Hye Kim, Ae Ri Kim, Yun Hui Choi, Aeryun Kim, Yongsung Sohn, Gye-Hyeong Woo, Jeong-Heon Cha, Eun-Jung Bak, Yun-Jung Yoo
BACKGROUND: Periodontitis is an infectious disease that manifests as alveolar bone loss surrounding the roots of teeth. Diabetes aggravates periodontitis-induced alveolar bone loss via suppression of bone formation. Intermittent parathyroid hormone (PTH) administration displays an anabolic effect on bone. In this study, we investigated the effect of intermittent PTH administration on alveolar bone loss in type 1 diabetic rats with periodontitis. METHODS: Rats were divided into control (C), periodontitis (P), periodontitis treated with PTH (P + PTH), diabetes with periodontitis (DP), and diabetes with periodontitis treated with PTH (DP + PTH) groups...
March 15, 2018: Journal of Translational Medicine
Teruyo Nakatani, Tiffany Chen, Joshua Johnson, Jennifer J Westendorf, Nicola C Partridge
Histone deacetylase 4 (Hdac4) is known to control chondrocyte hypertrophy and bone formation. We have previously shown that parathyroid hormone (PTH) regulates many aspects of Hdac4 function in osteoblastic cells in vitro; however, in vivo confirmation was previously precluded by pre-weaning lethality of the Hdac4 deficient mice. To analyze the function of Hdac4 in bone in mature animals, we generated mice with osteoblast lineage-specific knockout of Hdac4 (Hdac4ob-/- ) by crossing transgenic mice expressing Cre recombinase under the control of a 2...
March 15, 2018: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
Aya Shibamoto, Toru Ogawa, Joke Duyck, Katleen Vandamme, Ignace Naert, Keiichi Sasaki
The objective of this study is to examine the effect of low-magnitude, high-frequency (LMHF) loading, and anti-osteoporosis medications such as parathyroid hormone (PTH) and bisphosphonates on peri-implant bone healing in an osteoporosis model, and to assess their combined effects on these processes. Thirteen-week-old ovariectomized rats (n = 44) were divided into three groups: PTH, alendronate, and saline. After 3 weeks of drug administration, titanium implants were inserted into the tibiae. Each group was subdivided into two groups: with or without LMHF loading via whole-body vibration (50 Hz at 0...
March 13, 2018: International Journal of Oral Science
Beata Znorko, Dariusz Pawlak, Ewa Oksztulska-Kolanek, Tomasz Domaniewski, Anna Pryczynicz, Alicja Roszczenko, Joanna Rogalska, Paweł Lipowicz, Michał Doroszko, Malgorzata Michalina Brzoska, Krystyna Pawlak
Osteoprotegerin (OPG), receptor activator of NF-κB ligand (RANKL), and parathyroid hormone (PTH) play a central role in the regulation of bone turnover in chronic kidney disease (CKD), but their influence on bone mineral density (BMD) and strength remains unclear, particularly in children. We studied the clinical significance of OPG and RANKL in relation to PTH, femur weight, BMD, and bone biomechanical properties in growing rats after one month (CKD-1) and three months (CKD-3) of surgically-induced mild CKD...
March 9, 2018: Cytokine
Diddier Prada, Jia Zhong, Elena Colicino, Antonella Zanobetti, Joel Schwartz, Nicholas Dagincourt, Shona C Fang, Itai Kloog, Joseph M Zmuda, Michael Holick, Luis A Herrera, Lifang Hou, Francesca Dominici, Benedetta Bartali, Andrea A Baccarelli
Background: Air particulate matter (PM) is a ubiquitous environmental exposure associated with oxidation, inflammation, and age-related chronic disease. Whether PM is associated with loss of bone mineral density (BMD) and risk of bone fractures is undetermined. Methods: We conducted two complementary studies of: (i) long-term PM <2.5 μm (PM2.5 ) levels and osteoporosis-related fracture hospital admissions among 9.2 million Medicare enrollees of the Northeast/Mid-Atlantic United States between 2003-2010; (ii) long-term black carbon [BC] and PM2...
November 2017: Lancet. Planetary Health
Jürgen Floege, Kate Tsirtsonis, Jan Iles, Tilman B Drueke, Glenn M Chertow, Patrick Parfrey
The calcimimetic cinacalcet is used to treat secondary hyperparathyroidism in patients receiving dialysis, and asymptomatic hypocalcemia is often observed following its initiation. Here we investigated the incidence, predictors and therapeutic consequences of hypocalcemia by a post hoc analysis of the randomized, double-blind, placebo-controlled EValuation Of Cinacalcet Hydrochloride Therapy to Lower CardioVascular Events (EVOLVE) trial. Hypocalcemia was classified as mild (total serum calcium 8.0-8.39 mg/dL), moderate (7...
March 7, 2018: Kidney International
Wei Ling Lau, Yoshitsugu Obi, Kamyar Kalantar-Zadeh
Secondary hyperparathyroidism develops in CKD due to a combination of vitamin D deficiency, hypocalcemia, and hyperphosphatemia, and it exists in nearly all patients at the time of dialysis initiation. There is insufficient data on whether to prefer vitamin D analogs compared with calcimimetics, but the available evidence suggests advantages with combination therapy. Calcium derangements, patient adherence, side effects, and cost limit the use of these agents. When parathyroid hormone level persists >800 pg/ml for >6 months, despite exhaustive medical interventions, monoclonal proliferation with nodular hyperplasia is likely present along with decreased expression of vitamin D and calcium-sensing receptors...
March 9, 2018: Clinical Journal of the American Society of Nephrology: CJASN
Primploy Greeviroj, Thidarat Kitrungphaiboon, Pisut Katavetin, Kearkiat Praditpornsilpa, Somchai Eiam-Ong, Bertrand L Jaber, Paweena Susantitaphong
BACKGROUND: Cinacalcet could decrease serum calcium, phosphate, and parathyroid hormone (PTH) in previous meta-analyses. However, the effect of cinacalcet on the new biomarkers such as fibroblast growth factor-23 (FGF-23), bone markers, and vascular calcification are still unestablished. We conducted a meta-analysis to examine the effects of cinacalcet on all laboratory and clinical spectrums of chronic kidney disease-mineral bone disorders (CKD-MBD). METHODS: A systematic literature search was conducted in MEDLINE, Scopus, Cochrane Central Register of Controlled Trials, and Clinical Trials...
March 7, 2018: Nephron
Xiao Zheng, Wen Kang, Huihui Liu, Shanyu Guo
It is abundantly clear that tumor-derived parathyroid hormone-related protein (PTHrP), receptor activator of nuclear factor-κB ligand (RANKL) and osteoprotegerin (OPG) are central contributors in promoting osteolytic process of breast carcinoma bone metastasis. Forcusing on this molecular basis, the study was undertaken to explore the inhibition effects of total flavonoids from Scutellaria barbata D. Don (TF-SB) on human breast carcinoma bone metastasis. MDA-MB-231 cells and nude mouse models of breast cancer bone metastasis were given TF-SB in different concentrations...
February 27, 2018: International Journal of Molecular Medicine
Yi-Bang Cheng, Qian-Hui Guo, Dong-Yan Zhang, Ying Wang, Qi-Fang Huang, Chang-Sheng Sheng, Ji-Guang Wang, Jan A Staessen, Yan Li
OBJECTIVE: Carotid-femoral pulse wave velocity (cfPWV) was associated with serum parathyroid hormone (PTH) in untreated Chinese. We investigated in the same cohort whether cfPWV, brachial-ankle (baPWV) and heart-brachial (hbPWV) pulse wave velocity (PWV) were associated with rs6127099 (CYP24A1) and rs4074995 (RGS14). A previously published genome-wide association study demonstrated that each additional copy of the T (rs6127099) or G (rs4074995) allele was associated with a 7% or 3% higher serum PTH, respectively...
March 5, 2018: Blood Pressure
Larysse Maira Campos-Verdes, Danylo Rafhael Costa-Silva, João Paulo da Silva-Sampaio, Maria da Conceição Barros-Oliveira, Carla Solange Escórcio-Dourado, Luana Mota Martins, Fabiane Araújo Sampaio, Camila Revoredo, Francisco Adelton Alves-Ribeiro, Benedito Borges da Silva
Polymorphism of the calcium-sensing receptor gene (CaSR or CaR) has been associated with an increased risk for breast cancer. This receptor plays an important role in calcium homeostasis, and has also been detected in several tissues that are unrelated to calcium metabolism, such as the skin, brain, and breast. The calcium-sensing receptor on cellular level, it regulates cell differentiation, proliferation, cell death, and gene expression. In breast cancer cells, CaSR seems to stimulate secretion of the parathyroid hormone-related protein (PTHrP), which stimulates cellular proliferation...
March 5, 2018: Cancer Investigation
Brandon H Kim, Alexey Pereverzev, Shuying Zhu, Abby Oi Man Tong, S Jeffrey Dixon, Peter Chidiac
Parathyroid hormone (PTH) activates the PTH/PTH-related peptide receptor (PTH1R) on osteoblasts and other target cells. Mechanical stimulation of cells, including osteoblasts, causes release of nucleotides such as ATP into the extracellular fluid. In addition to its role as an energy source, ATP serves as an agonist at P2 receptors and an allosteric regulator of many proteins. We investigated the effects of concentrations of extracellular ATP, comparable to those that activate low affinity P2X7 receptors, on PTH1R signaling...
March 1, 2018: Cellular Signalling
Andrew J Shepherd, Aaron D Mickle, Suraj Kadunganattil, Hongzhen Hu, Durga P Mohapatra
Bone metastasis in breast, prostate and lung cancers often leads to chronic pain, which is poorly managed by existing analgesics. The neurobiological mechanisms that underlie chronic pain associated with bone-metastasized cancers are not well understood, but sensitization of peripheral nociceptors by tumor microenvironment factors has been demonstrated to be important. Parathyroid hormone-related peptide (PTHrP) is highly expressed in bone-metastasized breast and prostate cancers, and is critical to growth and proliferation of these tumors in the bone tumor microenvironment...
2018: Frontiers in Cellular Neuroscience
Lian He, Wan-Yu He, La-Ta A, Wen-Ling Yang, Ai-Hua Zhang
BACKGROUND/AIMS: Vascular calcification, which involves an active cellular transformation of vascular smooth muscle cells into bone forming cells, is prevalent and predicts mortality in dialysis patients. Its mechanisms are complex and unclear. We presume that irisin, a newly identified myokine also may play roles in vascular calcification in hemodialysis patients. This study aims to evaluate serum irisin levels and establish their relation to vascular calcification and other parameters in hemodialysis patients...
February 22, 2018: Kidney & Blood Pressure Research
Yuhui Zhang, Darsy Darssan, Elaine M Pascoe, David W Johnson, Haichen Pi, Jie Dong
Background: Vitamin D deficiency is highly prevalent in patients on dialysis. Although vitamin D deficiency is closely associated with cardiovascular disease (CVD) and high mortality in the general population, the relationship between serum 25-hydroxyvitamin D [25(OH)D] and all-cause and cardiovascular mortality in dialysis patients is uncertain. We aim to explore the relationship between serum 25(OH)D levels and all-cause and cardiovascular mortality in dialysis patients. Methods: This is a systematic review and meta-analysis of clinical studies among patients receiving maintenance dialysis...
February 21, 2018: Nephrology, Dialysis, Transplantation
Mikkel Bo Brent, Annemarie Brüel, Jesper Skovhus Thomsen
Osteopenia and sarcopenia develops rapidly during disuse. The study investigated whether intermittent parathyroid hormone (1-34) (PTH) and growth hormone (GH) administered alone or in combination could prevent or mitigate disuse osteopenia and sarcopenia in rats. Disuse was achieved by injecting 4 IU botulinum toxin A (BTX) into the right hindlimb musculature of 12-14-week-old female Wistar rats. Seventy-two rats were divided into six groups: 1. Baseline; 2. Ctrl; 3. BTX; 4. BTX + GH; 5. BTX + PTH; 6...
February 20, 2018: Bone
Anara Karaca, Vijayram Reddy Malladi, Yan Zhu, Olta Tafaj, Elena Paltrinieri, Joy Y Wu, Qing He, Murat Bastepe
GNAS mutations leading to constitutively active stimulatory G protein alpha-subunit (Gsα) cause different tumors, fibrous dysplasia of bone, and McCune-Albright syndrome, which are typically not associated with short stature. Enhanced signaling of the parathyroid hormone/parathyroid hormone-related peptide receptor, which couples to multiple G proteins including Gsα, leads to short bones with delayed endochondral ossification. It has remained unknown whether constitutive Gsα activity also impairs bone growth...
February 20, 2018: Bone
Tao Peng, Zhao Hu, Xiangdong Yang, Yanxia Gao, Chengjun Ma
RATIONALE: Acute kidney injury (AKI) with hyperparathyroidism caused by nitrite was rare, and renal function and parathyroid hormone (PTH) decreased to normal range after therapy. PATIENT CONCERNS: Acute kidney injury was diagnosed in a 40-year-old male with hyperparathyroidism and cyanosis of his hands and both forearms. DIAGNOSES: The patient ate some recently pickled vegetables, and he experienced nausea, vomiting and diarrhoea without oliguria or anuria; Additionally, his hands and both forearms had a typical blue ash appearance...
February 2018: Medicine (Baltimore)
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