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Associations Between Serum Leptin Level and Bone Turnover in Kidney Transplant Recipients
Associations between Serum Leptin Level and Bone Turnover in Kidney Transplant Recipients ʈ ʈ ʈ Csaba P. Kovesdy,*† Miklos Z. Molnar,‡§ Maria E. Czira, Anna Rudas, Akos Ujszaszi, Laszlo Rosivall,‡ Miklos Szathmari,¶ Adrian Covic,** Andras Keszei,†† Gabriella Beko,‡‡ ʈ Peter Lakatos,¶ Janos Kosa,¶ and Istvan Mucsi §§ *Division of Nephrology, Salem Veterans Affairs Medical Center, Salem, Virginia; †Division of Nephrology, University of Virginia, Charlottesville, Virginia; ‡Institute of Pathophysiology, Semmelweis University, Budapest, Hungary; §Harold Simmons Center for Chronic Disease Research & Epidemiology, Los Angeles Biomedical Research Institute at ʈ Harbor-University of California–Los Angeles Medical Center, Torrance, California; Institute of Behavioral Sciences, Semmelweis University, Budapest, Hungary; ¶First Department of Internal Medicine, Semmelweis University, Budapest, Hungary; **University of Medicine Gr T Popa, Iasi, Romania; ††Department of Epidemiology, Maastricht University, Maastricht, Netherlands; ‡‡Central Laboratory, Semmelweis University, Budapest, Hungary; and §§Division of Nephrology, Department of Medicine, McGill University Health Center, Montreal, Quebec, Canada Background and objectives: Obesity is associated with increased parathyroid hormone (PTH) in the general population and in patients with chronic kidney disease (CKD). A direct effect of adipose tissue on bone turnover through leptin production has been suggested, but such an association has not been explored in kidney transplant recipients. Design, setting, participants, & measurements: This study examined associations of serum leptin with PTH and with biomarkers of bone turnover (serum beta crosslaps [CTX, a marker of bone resorption] and osteocalcin [OC, a marker of bone formation]) in 978 kidney transplant recipients. Associations were examined in multivariable regression models. Path analyses were used to determine if the association of leptin with bone turnover is independent of PTH. -
A Left/Right Comparison of Twice-Daily Calcipotriol Ointment and Calcitriol Ointment in Patients with Psoriasis: the Effect on Keratinocyte Subpopulations
Acta Derm Venereol 2004; 84: 195–200 INVESTIGATIVE REPORT A Left/Right Comparison of Twice-Daily Calcipotriol Ointment and Calcitriol Ointment in Patients with Psoriasis: The Effect on Keratinocyte Subpopulations Mannon E.J. FRANSSEN, Gys J. DE JONGH, Piet E.J. VAN ERP and Peter C.M. VAN DE KERKHOF Department of Dermatology, University Medical Centre Nijmegen, The Netherlands Vitamin D3 analogues are a first-line treatment of Calcipotriol (Daivonex1,50mg/g ointment, Leo chronic plaque psoriasis, but so far, comparative clinical Pharmaceutical Products, Denmark) has been investi- studies on calcipotriol and calcitriol ointment are sparse, gated intensively during the last decade, and has proven and in particular no comparative studies are available on to be a valuable tool in the management of chronic cell biological effects of these compounds in vivo. Using plaque psoriasis. A review by Ashcroft et al. (1), based on flow cytometric assessment, we investigated whether these a large number of randomized controlled trials, showed compounds had different effects on the composition and that calcipotriol was at least as effective as potent DNA synthesis of epidermal cell populations responsible topical corticosteroids, 1a,-25-dihydroxycholecalciferol for the psoriatic phenotype. For 8 weeks, 20 patients with (calcitriol), short-contact dithranol, tacalcitol and coal psoriasis vulgaris were treated twice daily with calcipo- tar. Recently, Scott et al. (2) presented an overview of triol and calcitriol ointment in a left/right comparative studies on the use of calcipotriol ointment in the study. Before and after treatment, clinical assessment of management of psoriasis. They reconfirmed the super- target lesions was performed, together with flow cyto- ior efficacy of a twice-daily calcipotriol ointment metric analysis of epidermal subpopulations with respect regimen to the treatments as mentioned above, and to keratin (K) 10, K6, vimentin and DNA distribution. -
The Role of Reproductive Hormones in Epithelial Ovarian Carcinogenesis
H Gharwan et al. Hormones and epithelial 22:6 R339–R363 Review ovarian cancer The role of reproductive hormones in epithelial ovarian carcinogenesis Helen Gharwan1, Kristen P Bunch2,3 and Christina M Annunziata2 1National Cancer Institute, National Institutes of Health, 10 Center Drive, Building 10, 12N226, Bethesda, Correspondence Maryland 20892-1906, USA should be addressed 2Women’s Malignancies Branch, National Cancer Institute, National Institutes of Health, Center for Cancer Research, to H Gharwan Bethesda, Maryland, USA Email 3Department of Gynecologic Oncology, Walter Reed National Military Medical Center, Bethesda, Maryland, USA [email protected] Abstract Epithelial ovarian cancer comprises w85% of all ovarian cancer cases. Despite acceptance Key Words regarding the influence of reproductive hormones on ovarian cancer risk and considerable " ovarian cancer advances in the understanding of epithelial ovarian carcinogenesis on a molecular level, " hormone action complete understanding of the biologic processes underlying malignant transformation of " reproductive ovarian surface epithelium is lacking. Various hypotheses have been proposed over the past " immune several decades to explain the etiology of the disease. The role of reproductive hormones in " endocrine epithelial ovarian carcinogenesis remains a key topic of research. Primary questions in the field of ovarian cancer biology center on its developmental cell of origin, the positive and negative effects of each class of hormones on ovarian cancer initiation and progression, and the role of the immune system in the ovarian cancer microenvironment. The development of the female reproductive tract is dictated by the hormonal milieu during embryogenesis. Endocrine-Related Cancer Intensive research efforts have revealed that ovarian cancer is a heterogenous disease that may develop from multiple extra-ovarian tissues, including both Mu¨ llerian (fallopian tubes, endometrium) and non-Mu¨ llerian structures (gastrointestinal tissue), contributing to its heterogeneity and distinct histologic subtypes. -
The ENDOCRINE SYSTEM Luteinizinghormones Hormone/Follicle-Stimulating Are Chemical Hormone Messengers
the ENDOCRINE SYSTEM LuteinizingHormones hormone/follicle-stimulating are chemical hormone messengers. (LH/FSH) They bind to specific target cells Crucial for sex cell production Growth hormone–releasingwith receptors, hormone regulate (GHRH) metabolism and the sleep cycle, and contribute Thyrotropin-releasing hormone (TRH) Regulatesto thyroid-stimulating growth and hormone development. release The endocrine glands and organs secrete Corticotropin-releasing hormone (CRH) Regulatesthese to release hormones of adrenocorticotropin all over that is vitalthe to body. the production of cortisol (stress response hormone). The hypothalamus is a collection of specialized cells that serve as the central relay system between the nervous and endocrine systems. hypothalamus Growth hormone-releasing hormone (GHRH) Thyrotropin-releasing hormone (TRH) Regulates the release of thyroid-stimulating hormones Luteinizing hormone/follicle-stimulating hormone (LH/FSH) Crucial for sex cell production Corticotropin-releasing hormone (CRH) Regulates the release of adrenocorticotropin that’s vital to the production of cortisol 2 The hypothalamus translates the signals from the brain into hormones. From there, the hormones then travel to the pituitary gland. Located at the base of the brain inferior to the hypothalamus, the pituitary gland secretes endorphins, controls several other endocrine glands, and regulates the ovulation and menstrual cycles. pituitary gland 3 The anterior lobe regulates the activity of the thyroid, adrenals, and reproductive glands by producing hormones that regulate bone and tissue growth in addition to playing a role in the absorption of nutrients and minerals. anterior lobe Prolactin Vital to activating milk production in new mothers Thyrotropin Stimulates the thyroid to produce thyroid hormones vital to metabolic regulation Corticotropin Vital in stimulating the adrenal gland and the “fight-or-flight” response 4 The posterior lobe stores hormones produced by the hypothalamus. -
A Clinical Update on Vitamin D Deficiency and Secondary
References 1. Mehrotra R, Kermah D, Budoff M, et al. Hypovitaminosis D in chronic 17. Ennis JL, Worcester EM, Coe FL, Sprague SM. Current recommended 32. Thimachai P, Supasyndh O, Chaiprasert A, Satirapoj B. Efficacy of High 38. Kramer H, Berns JS, Choi MJ, et al. 25-Hydroxyvitamin D testing and kidney disease. Clin J Am Soc Nephrol. 2008;3:1144-1151. 25-hydroxyvitamin D targets for chronic kidney disease management vs. Conventional Ergocalciferol Dose for Increasing 25-Hydroxyvitamin supplementation in CKD: an NKF-KDOQI controversies report. Am J may be too low. J Nephrol. 2016;29:63-70. D and Suppressing Parathyroid Hormone Levels in Stage III-IV CKD Kidney Dis. 2014;64:499-509. 2. Hollick MF. Vitamin D: importance in the prevention of cancers, type 1 with Vitamin D Deficiency/Insufficiency: A Randomized Controlled Trial. diabetes, heart disease, and osteoporosis. Am J Clin Nutr 18. OPKO. OPKO diagnostics point-of-care system. Available at: http:// J Med Assoc Thai. 2015;98:643-648. 39. Jetter A, Egli A, Dawson-Hughes B, et al. Pharmacokinetics of oral 2004;79:362-371. www.opko.com/products/point-of-care-diagnostics/. Accessed vitamin D(3) and calcifediol. Bone. 2014;59:14-19. September 2 2015. 33. Kovesdy CP, Lu JL, Malakauskas SM, et al. Paricalcitol versus 3. Giovannucci E, Liu Y, Rimm EB, et al. Prospective study of predictors ergocalciferol for secondary hyperparathyroidism in CKD stages 3 and 40. Petkovich M, Melnick J, White J, et al. Modified-release oral calcifediol of vitamin D status and cancer incidence and mortality in men. -
Endocrine Paraneoplastic Syndromes: a Review
Endocrinology & Metabolism International Journal Review Article Open Access Endocrine paraneoplastic syndromes: a review Abstract Volume 1 Issue 1 - 2015 Paraneoplastic endocrine syndromes result from ectopic production of hormones by Hala Ahmadieh,1 Asma Arabi2 different tumors. Hypercalcemia of malignancy is the most common, mostly caused by 1Division of Endocrinology, American University of Beirut, ectopic parathyroid hormone related peptide (PTHrP) production which increases bone Lebanon resorption. Other causes include the rare ectopic parathyroid hormone (PTH) production, 2Department of Internal Medicine, American University of ectopic production of 1, 25-(OH)2 vitamin D by the tumor and its adjacent macrophages and Beirut-Medical Center, Lebanon bone metastasis which by itself in addition to the local production of PTHrP at the level of the bone lead to bone resorption and thus hypercalcemia. Treatment includes extracellular Correspondence: Asma Arabi, Department of Internal fluid volume repletion, bisphosphonates or denosumab and calcitonin. Ectopic Cushing’s Medicine, Division of Endocrinology, American University of syndrome caused by ectopic ACTH production results in hypokalemia, proximal muscle Beirut-Medical Center, Po Box 11-0236, Riad El-Solh, Beirut, weakness, easy bruisability, hypertension, diabetes and psychiatric abnormalities including Lebanon, Email depression and mood disorders. Different diagnostic measures help to differentiate Cushing’s disease from ectopic Cushing’s syndrome. Treatment includes surgical resection Received: October 26, 2014 | Published: January 02, 2015 of tumor and medical therapy to suppress excess cortisol production. Ectopic secretion of ADH has been associated with different tumor types. The best treatment options include removal of the underlying tumor, chemotherapy, or radiotherapy in addition to free water restriction, demeclocycline and vaptans. -
TGF-Β Signaling Proteins and CYP24A1 May Serve As Surrogate
1437 Original Article TGF-β signaling proteins and CYP24A1 may serve as surrogate markers for progesterone calcitriol treatment in ovarian and endometrial cancers of different histological types Ana Paucarmayta1, Hannah Taitz1, Yovanni Casablanca1,2,3, Gustavo C. Rodriguez4, G. Larry Maxwell2,3,5, Kathleen M. Darcy2,3,6, Viqar Syed1,3,7 1Department of Obstetrics and Gynecology, Uniformed Services University of the Health Sciences, Bethesda, MD, USA; 2Gynecologic Cancer Center of Excellence, 3John P. Murtha Cancer Center, Department of Obstetrics and Gynecology, Uniformed Services University of the Health Sciences and Walter Reed National Military Medical Center, Bethesda, MD, USA; 4Division of Gynecologic Oncology, NorthShore University HealthSystem, University of Chicago, Evanston, IL, USA; 5Department of Obstetrics and Gynecology, Inova Fairfax Hospital, Falls Church, VA, USA; 6Inova Schar Cancer Institute, Inova Center for Personalized Health, Falls Church, VA, USA; 7Department of Molecular and Cell Biology, Uniformed Services University of the Health Sciences, Bethesda, MD, USA Contributions: (I) Conception and design: KM Darcy, GL Maxwell, V Syed; (II) Administrative support: None; (III) Provision of study materials or patients: None; (IV) Collection and assembly of data: A Paucarmayta, H Taitz, V Syed; (V) Data analysis and interpretation: A Paucarmayta, H Taitz, KM Darcy, V Syed; (VI) Manuscript writing: All authors; (VII) Final approval of manuscript: All authors. Correspondence to: Viqar Syed. John P. Murtha Cancer Center, Department of Obstetrics and Gynecology, Department of Molecular and Cell Biology, Uniformed Services University of the Health Sciences, 4301 Jones Bridge Road, Room# A-3080, Bethesda, MD, USA. Email: [email protected]. Background: Strategies are needed to coordinately block drivers and induce suppressors of cancer to reduce incidence and improve outcomes for individuals with inherited or acquired risk. -
Vitamin D3 Constrains Estrogen's Effects and Influences Mammary
www.nature.com/scientificreports OPEN Vitamin D3 constrains estrogen’s efects and infuences mammary epithelial organization in 3D Received: 16 January 2019 Accepted: 18 April 2019 cultures Published: xx xx xxxx Nafs Hasan 1, Carlos Sonnenschein1,2 & Ana M. Soto 1,2 Vitamin D3 (vitD3) and its active metabolite, calcitriol (1,25-(OH)2D3), afect multiple tissue types by interacting with the vitamin D receptor (VDR). Although vitD3 defciency has been correlated with increased incidence of breast cancer and less favorable outcomes, randomized clinical trials have yet to provide conclusive evidence on the efcacy of vitD3 in preventing or treating breast cancer. Additionally, experimental studies are needed to assess the biological plausibility of these outcomes. The mammary gland of VDR KO mice shows a forid phenotype revealing alterations of developmental processes that are largely regulated by mammotropic hormones. However, most research conducted on vitD3’s efects used 2D cell cultures and supra-physiological doses of vitD3, conditions that spare the microenvironment in which morphogenesis takes place. We investigated the role of vitD3 in mammary epithelial morphogenesis using two 3D culture models. VitD3 interfered with estrogen’s actions on T47D human breast cancer cells in 3D diferently at diferent doses, and recapitulated what is observed in vivo. Also, vitD3 can act autonomously and afected the organization of estrogen-insensitive MCF10A cells in 3D collagen matrix by infuencing collagen fber organization. Thus, vitD3 modulates mammary tissue organization independent of its efects on cell proliferation. Breast cancer remains a major cause of mortality among women worldwide. Epidemiological studies have shown that key stages during breast development are particularly susceptible to the efects of carcinogens. -
Physiological Adaptations in Pregnancy-Resources Table
Responsibility/ Adaptations in Pregnancy Additional Information Hormones ➢ Maintaining homeostasis Perinatal Nursing – 2021 ➢ Regulation of growth Simpson, Creehan, O’Brien-Abel, Roth ➢ Development and Cellular communication & Rohan Chapter three – Physiological Changes of Pregnancy Blackburn, Susan Tucker Page 48 Placenta ➢ Responsible for transfer of nutrients to the fetus ❖ Placental Hormones are critical and waste products away from the fetus for many of the metabolic and ➢ Functions as the fetal lungs, gi, liver, kidney and endocrine changes during endocrine organ pregnancy ➢ Major Hormones ❖ Fetal bone growth and placental ❖ hCG - Human chorionic gonadotropin calcium transport is mediated ❖ hPL – Human Placental Lactogen by Parathyroid hormone related ❖ Estrogen protein or PTHrP ❖ Progesterone ❖ Corticotrophin-releasing ❖ Serves as an endocrine gland hormone or CRH and PGs have a ❖ Major Hormones major role in initiation of ❖ hCG - Human chorionic gonadotropin myometrial contractility and ❖ hPL – Human Placental Lactogen labor onset ❖ Estrogen Page 49 ❖ Progesterone ➢ HCG ➢ Primarily secreted by the placenta Page 49 1 | P a g e ➢ Major function is to maintain progesterone and estrogen production by the corpus luteum until the placental function is adequate (approximately 10 weeks post-conception) ➢ Thought to have a role in fetal testosterone and corticosteroid production and angiogenesis ➢ Found in maternal serum by within 7-8 days after implantation ➢ Positive pregnancy test – 3 weeks after conception and 5 weeks after LMP ➢ Elevated -
Paclitaxel, Carboplatin and 1,25-D3 Inhibit Proliferation of Endometrial
ANTICANCER RESEARCH 37 : 6575-6581 (2017) doi:10.21873/anticanres.12114 Paclitaxel, Carboplatin and 1,25-D3 Inhibit Proliferation of Endometrial Cancer Cells In Vitro TEA KUITTINEN 1, PÄIVI ROVIO 1, SYNNÖVE STAFF 1,2 , TIINA LUUKKAALA 3,4 , ANNE KALLIONIEMI 5,6 , SEIJA GRÉNMAN 7,8 , MARITA LAURILA 9 and JOHANNA MÄENPÄÄ 1,10 1Department of Obstetrics and Gynaecology, Tampere University Hospital, Tampere, Finland; 2Laboratory of Cancer Biology, BioMediTech Institute, Faculty of Medicine and Life Sciences, University of Tampere, Tampere, Finland; 3Research and Innovation Centre, Tampere University Hospital, Tampere, Finland; 4Health Sciences, Faculty of Social Sciences, University of Tampere, Tampere, Finland; 5BioMediTech Institute and Faculty of Medicine and Life Sciences, University of Tampere, Tampere, Finland; 6Fimlab Ltd, Tampere University Hospital, Tampere, Finland; 7Department of Obstetrics and Gynaecology, Turku University Hospital, Turku, Finland; 8University of Turku, Turku, Finland; 9Department of Pathology, Fimlab Ltd, Tampere University Hospital, Tampere, Finland; 10 Faculty of Medicine and Life Sciences, University of Tampere, Tampere, Finland Abstract. Background/Aim: Endometrial cancer cells are combination of these compounds. The corresponding numbers known to be sensitive to carboplatin and paclitaxel. in UT-EC-3 were 70%, 33% and 65%, respectively. 1,25-D3 Further more , vitamin D (1,25-D3) has been reported to inhibit suppressed cell growth 88% with paclitaxel, 63% with endometrial cancer cell growth both as a single agent and carboplatin and 87% with their combination in the UT-EC-1 combined with carboplatin. However, there are no studies cell line. Conclusion: In both cell lines, single-agent paclitaxel comparing the effect of paclitaxel and carboplatin as single was as effective as the combination of the compounds and agents vs. -
Calcitriol, Parathyroid Hormone, and Accumulation of Aluminum in Bone in Dogs with Renal Failure
Calcitriol, parathyroid hormone, and accumulation of aluminum in bone in dogs with renal failure. H H Malluche, … , C Matthews, P Fanti J Clin Invest. 1987;79(3):754-761. https://doi.org/10.1172/JCI112881. Research Article Accumulation of aluminum in bone is a frequent finding in patients requiring chronic dialysis and is associated with considerable morbidity and/or mortality. Until now, evidence seemed to point to relatively low circulating levels of parathyroid hormone as a contributing factor, but because levels of parathyroid hormone and calcitriol are interrelated, calcitriol might be also involved. In this study we employed an animal model to evaluate the single and combined effects of parathyroid hormone and calcitriol on bone aluminum accumulation. The results show significantly less aluminum accumulation in calcitriol-replete dogs independent of the presence or absence of parathyroid hormone. These results indicate that low levels of calcitriol may play a role in the development of aluminum related bone disease. Further studies are needed to demonstrate whether administration of calcitriol in patients with renal insufficiency will prevent development of aluminum-related bone disease. Find the latest version: https://jci.me/112881/pdf Calcitriol, Parathyroid Hormone, and Accumulation of Aluminum in Bone in Dogs with Renal Failure Hartmut H. Malluche, Marie-Claude Faugere, Robert M. Friedler, Clifford Matthews, and Paolo Fanti Division ofNephrology, Bone and Mineral Metabolism, Department ofMedicine, University ofKentucky, Lexington, Kentucky 40536-0084 Abstract We found patients with predominant hyperparathyroid bone disease to have less stainable bone aluminum than those with Accumulation of aluminum in bone is a frequent finding in pa- mixed uremic osteodystrophy or low turnover osteomalacia (8) tients requiring chronic dialysis and is associated with consid- whereas Alfrey et al. -
The Regulation of Parathyroid Hormone Secretion and Synthesis
BRIEF REVIEW www.jasn.org The Regulation of Parathyroid Hormone Secretion and Synthesis Rajiv Kumar* and James R. Thompson† *Division of Nephrology and Hypertension, Department of Internal Medicine, Biochemistry and Molecular Biology, and †Department of Physiology, Biophysics and Bioengineering, Mayo Clinic College of Medicine, Mayo Clinic, Rochester, Minnesota ABSTRACT Secondary hyperparathyroidism classically appears during the course of chronic renal basis of these observations regarding failure and sometimes after renal transplantation. Understanding the mechanisms by pathogenesis, therapy for 2°HPT in the which parathyroid hormone (PTH) synthesis and secretion are normally regulated is context of CKD and ESRD includes the important in devising methods to regulate overactivity and hyperplasia of the para- control of serum phosphate concentra- ϩ thyroid gland after the onset of renal insufficiency. Rapid regulation of PTH secretion tions, the administration of Ca2 and in response to variations in serum calcium is mediated by G-protein coupled, calcium- vitamin D analogs, and the administra- sensing receptors on parathyroid cells, whereas alterations in the stability of mRNA- tion of calcimimetics.33,34,16,35,36 encoding PTH by mRNA-binding proteins occur in response to prolonged changes in Nevertheless, 2°HPT remains a signifi- serum calcium. Independent of changes in intestinal calcium absorption and serum cant clinical problem and additional meth- calcium, 1␣,25-dihydroxyvitamin D also represses the transcription of PTH by associ- ods for the treatment of this condition would ating with the vitamin D receptor, which heterodimerizes with retinoic acid X receptors be helpful, especially in refractory situations, to bind vitamin D-response elements within the PTH gene.