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Fitzpatrick D, Laird E, Ward M, Hoey L, Hughes CF, Strain JJ, Cunningham C, Healy M, Molloy AM, McNulty H, Lannon R, McCarroll K. Secondary hyperparathyroidism: Predictors and relationship with vitamin D status, bone turnover markers and bone mineral density. Bone 2024; 184:117108. [PMID: 38642819 DOI: 10.1016/j.bone.2024.117108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/05/2024] [Revised: 04/15/2024] [Accepted: 04/17/2024] [Indexed: 04/22/2024]
Abstract
INTRODUCTION Secondary hyperparathyroidism (SHPT) has adverse implications for bone health but is relatively understudied. In this study we examine the prevalence and determinants of SHPT and describe the relationship of SHPT with bone turnover markers and bone mineral density (BMD) in older Irish adults. METHOD Eligible participants (n = 4139) were identified from the Trinity-Ulster-Department of Agriculture (TUDA) study, a cohort of Irish adults aged ≥60 years. Exclusion criteria included an estimated glomerular filtration rate (eGFR) <30 ml/min and serum calcium >2.5 mmol/l to remove hyperparathyroidism due to advanced chronic kidney disease (CKD) and primary hyperparathyroidism respectively. The relationship between SHPT and bone turnover markers and BMD (measured by densitometry) was examined in a subsample (n = 1488). Vitamin D deficiency was defined as 25-hydroxyvitamin D [25 (OH)D] <30 nmol/l. RESULTS Participants had a mean age of 73.6 ± 7.9 years, 65.1 % were female and 19.4 % were found to be vitamin D deficient. The prevalence of SHPT decreased as vitamin D increased, from 30.6 % in those deficient to 9.8 % in those with 25(OH)D ≥ 50 nmol/l and increased with declining kidney function. In non‑calcium supplement users, principal determinants of SHPT were vitamin D deficiency (OR 4.18, CI 3.05-5.73, p < 0.001), eGFR 30-44 ml/min (OR 3.69, CI 2.44-5.57, p < 0.001), loop diuretic use (OR 3.52, CI 2.59-4.79, p < 0.001) and to a lesser extent body mass index (p = 0.001), eGFR 45-59 ml/min (p < 0.001) and 25(OH)D level 30-49 nmol/l (p = 0.002). Similar findings were observed in calcium supplement users, though proton pump inhibitors were also associated with SHPT (OR 1.55, CI 1.08-2.22, p = 0.018) while vitamin D 30-49 nmol/l was not. In participants with SHPT versus those without, bone turnover markers were higher: bone alkaline phosphatase (p = 0.017) and tartrate-resistant acid phosphatase (p = 0.033), whilst there was lower BMD at the neck of femur (0.880 vs. 0.903 g/cm2, p = 0.033) and total hip (0.968 vs. 0.995 g/cm2, P = 0.017). DISCUSSION The results show that up to one in six older Irish adults had SHPT and this was associated with lower BMD and higher concentrations of bone turnover markers. Both vitamin D deficiency and 25(OH)D level 30-49 nmol/l were important predictors of SHPT. Loop diuretics and PPIs may also increase the risk of SHPT, and their use may need to be carefully considered in this population. Further studies examining the potential impact of these factors on bone health in similar populations to our study sample are warranted.
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Affiliation(s)
- Donal Fitzpatrick
- Mercer's Institute for Research on Ageing, St James's Hospital, Dublin, Ireland; School of Medicine, Trinity College, Dublin, Ireland.
| | - Eamon Laird
- Department of Health & Nutritional Sciences, Atlantic Technological University Sligo, Ireland
| | - Mary Ward
- Nutrition Innovation Centre for Food and Health, University of Ulster, Coleraine BT52 1SA, Northern Ireland, United Kingdom of Great Britain and Northern Ireland
| | - Leane Hoey
- Nutrition Innovation Centre for Food and Health, University of Ulster, Coleraine BT52 1SA, Northern Ireland, United Kingdom of Great Britain and Northern Ireland
| | - Catherine F Hughes
- Nutrition Innovation Centre for Food and Health, University of Ulster, Coleraine BT52 1SA, Northern Ireland, United Kingdom of Great Britain and Northern Ireland
| | - J J Strain
- Nutrition Innovation Centre for Food and Health, University of Ulster, Coleraine BT52 1SA, Northern Ireland, United Kingdom of Great Britain and Northern Ireland
| | - Conal Cunningham
- Mercer's Institute for Research on Ageing, St James's Hospital, Dublin, Ireland
| | - Martin Healy
- Department of Biochemistry, St James's Hospital, Dublin, Ireland
| | - Anne M Molloy
- School of Medicine, Trinity College, Dublin, Ireland
| | - Helene McNulty
- Nutrition Innovation Centre for Food and Health, University of Ulster, Coleraine BT52 1SA, Northern Ireland, United Kingdom of Great Britain and Northern Ireland
| | - Rosaleen Lannon
- Mercer's Institute for Research on Ageing, St James's Hospital, Dublin, Ireland; School of Medicine, Trinity College, Dublin, Ireland
| | - Kevin McCarroll
- Mercer's Institute for Research on Ageing, St James's Hospital, Dublin, Ireland; School of Medicine, Trinity College, Dublin, Ireland
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Verly E, Lapauw B, Verroken C. Evaluation of the thiazide challenge test to differentiate primary from hypercalciuria-related hyperparathyroidism. J Clin Endocrinol Metab 2024:dgae239. [PMID: 38605120 DOI: 10.1210/clinem/dgae239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Revised: 03/21/2024] [Accepted: 04/08/2024] [Indexed: 04/13/2024]
Abstract
CONTEXT treatment of primary hyperparathyroidism (PHPT) and secondary hyperparathyroidism due to idiopathic hypercalciuria (SHPT-IH) is markedly different. Robust diagnostic tools to differentiate between both entities are however lacking. OBJECTIVE evaluate the thiazide challenge test (TCT) in clinical practice, its aid in clinical decision making, evaluate the accuracy (sensitivity, specificity) and potentially useful parameters of the TCT. DESIGN monocentric observational retrospective cohort study from January 2017 to November 2023. SETTING outpatient, Ghent University Hospital (Belgium). PATIENTS 25 adult patients with hypercalciuria, elevated parathyroid hormone (PTH), and high-normal or elevated serum calcium that underwent a TCT. INTERVENTION TCT. OUTCOME MEASURES serum, urinary biochemical parameters before and after testing, clinical and imaging outcomes, treatment, and follow-up. RESULTS patients with a TCT-based working diagnosis of PHPT show greater increases in albumin-adjusted calcium and total serum calcium concentration than patients with SHPT-IH (+0,11 ± 0,10 vs. + 0,0071 ± 0,10mmol/l; p = 0,025 and +0,14 ± 0,12 vs. + 0,012 ± 0,15mmol/l; p = 0,024 respectively). The TCT-based working diagnosis of PHPT has a sensitivity of 81,8%, a specificity of 77,8% and a likelihood ratio of 3,68 of estimating a correct final diagnosis.Urinary calcium excretion, PTH, calcium-phosphorous ratio, PTH-inhibition rate, and parathyroid function index do not differ significantly in patients with PHPT compared to those with SHPT-IH. CONCLUSION the TCT aids in discriminating patients with PHPT from those with SHPT-IH based on a rise in serum calcium. Other parameters are not different between both groups. Larger prospective trials are necessary to further define the diagnostic potential of the TCT, its most appropriate biochemical outcome variables, and decision cut-offs.
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Affiliation(s)
- Ewout Verly
- Ghent University Hospital (Department of Endocrinology, Unit for Osteoporosis and Metabolic Bone Diseases)
| | - Bruno Lapauw
- Ghent University Hospital (Department of Endocrinology, Unit for Osteoporosis and Metabolic Bone Diseases), Ghent University (Department of Internal Medicine and Pediatrics)
| | - Charlotte Verroken
- Ghent University Hospital (Department of Endocrinology, Unit for Osteoporosis and Metabolic Bone Diseases)
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Halimi C, Bor C, Chieze R, Saint-Jacques C, Périé S, Wagner I, Talbot JN, Montravers F, Letavernier E, Buob D, Daudon M, Frochot V, Haymann JP. Comparison of normocalcemic versus hypercalcemic primary hyperparathyroidism in a hypercalciuric renal stone population. J Clin Endocrinol Metab 2024:dgae162. [PMID: 38497124 DOI: 10.1210/clinem/dgae162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/12/2023] [Revised: 02/09/2024] [Accepted: 03/11/2024] [Indexed: 03/19/2024]
Abstract
CONTEXT Primary hyperparathyroidism (PHPT) is commonly diagnosed in the setting of hypercalcemia, whereas normocalcemic primary hyperparathyroidism (NHPT) may be misdiagnosed. OBJECTIVE Our objective was to compare hypercalcemic hyperparathyroidism (HPHPT) versus NHPT hypercalciuric renal stone patients. DESIGN AND SETTING We took advantage of a routine calcium load test performed in hypercalciuric renal stone patients to assess retrospectively among PHPT patients, prevalence and characteristics of NHPT and HPHPT under a calcium restricted diet. RESULTS Among 1671 hypercalciuric patients included, 91 patients have a final diagnosis of PHPT(post load ionized calcium (iCa)>1.31 mmol/L and PTH>30 pg/ml). Prevalence of NHPT is 40% of all PHPT, however according to total serum calcium 4/35 NHPT and 7/56 HPHPT would have been misclassified in the other group. 18/35 NHPT and 40/56 HPHPT underwent parathyroidectomy. No significant characteristics related to parathyroid weight, stone composition or bone remodeling biomarkers is detected between groups. Whereas iCa is higher in HPHPT in fasting state and after calcium load, we found no difference for calcium diet, 24-hour calciuria, or calcitriol. Of notice, renal calcium excretion (FECa) post load increases by 303% in NHPT but only 176% in HPHPT (p=0.01) likely explained by a lesser PTH decrease (p=0.02). However, a strong negative association (p<0.0001) detected between pooled pre and post load iCa and PTH only in NHPT group suggests a persistent efficient PTH-CaSR control within parathyroid glands in this group. CONCLUSION Our data show the relevance of dynamic tests to unmask NHPT in hypercalciuric renal stone patients.
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Affiliation(s)
- Caroline Halimi
- Service ORL et chirurgie cervico-faciale, Hôpital Bichat, Assistance Publique-Hôpitaux de Paris, Paris, France
- Sorbonne Université, INSERM, Unité mixte de Recherche 1155, Kidney Research Centre, AP-HP, Hôpital Tenon, Paris, France
| | - Clemence Bor
- Service de Nephrologie, Hôpital Européen de Paris, Aubervilliers, France
| | - Remi Chieze
- Service d'Explorations Fonctionnelles, Hôpital Tenon, Assistance Publique-Hôpitaux de Paris, Paris, France
| | - Camille Saint-Jacques
- Service d'Explorations Fonctionnelles, Hôpital Tenon, Assistance Publique-Hôpitaux de Paris, Paris, France
| | - Sophie Périé
- Service ORL et chirurgie cervico-faciale, Centre Hospitalier Privé Ambroise Paré Hartmann, Neuilly sur Seine, France
| | - Isabelle Wagner
- Service ORL et chirurgie cervico-faciale, Hôpital Tenon, Assistance Publique-Hôpitaux de Paris, Paris, France
| | - Jean-Noel Talbot
- Service de médecine nucléaire, Hôpital Tenon, Assistance Publique-Hôpitaux de Paris, Paris, France
- Institut National des Sciences et Techniques Nucléaires (INSTN), Saclay, France
| | - Françoise Montravers
- Service de médecine nucléaire, Hôpital Tenon, Assistance Publique-Hôpitaux de Paris, Paris, France
| | - Emmanuel Letavernier
- Sorbonne Université, INSERM, Unité mixte de Recherche 1155, Kidney Research Centre, AP-HP, Hôpital Tenon, Paris, France
- Service d'Explorations Fonctionnelles, Hôpital Tenon, Assistance Publique-Hôpitaux de Paris, Paris, France
| | - David Buob
- Sorbonne Université, INSERM, Unité mixte de Recherche 1155, Kidney Research Centre, AP-HP, Hôpital Tenon, Paris, France
- Service d'anatomo-pathologie, Hôpital Tenon, Assistance Publique-Hôpitaux de Paris, Paris, France
| | - Michel Daudon
- Service d'Explorations Fonctionnelles, Hôpital Tenon, Assistance Publique-Hôpitaux de Paris, Paris, France
| | - Vincent Frochot
- Sorbonne Université, INSERM, Unité mixte de Recherche 1155, Kidney Research Centre, AP-HP, Hôpital Tenon, Paris, France
- Service d'Explorations Fonctionnelles, Hôpital Tenon, Assistance Publique-Hôpitaux de Paris, Paris, France
| | - Jean-Philippe Haymann
- Sorbonne Université, INSERM, Unité mixte de Recherche 1155, Kidney Research Centre, AP-HP, Hôpital Tenon, Paris, France
- Service d'Explorations Fonctionnelles, Hôpital Tenon, Assistance Publique-Hôpitaux de Paris, Paris, France
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Kalaria T, Lawson AJ, Duffy J, Agravatt A, Harris S, Ford C, Gama R, Webster C, Geberhiwot T. Age-specific Reference Intervals of Abbott Intact PTH-Potential Impacts on Clinical Care. J Endocr Soc 2024; 8:bvae004. [PMID: 38292595 PMCID: PMC10825829 DOI: 10.1210/jendso/bvae004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Indexed: 02/01/2024] Open
Abstract
Background PTH assays are not standardized; therefore, method-specific PTH reference intervals are required for interpretation of results. PTH increases with age in adults but age-related reference intervals for the Abbott intact PTH (iPTH) assay are not available. Methods Deidentified serum PTH results from September 2015 to November 2022 were retrieved from the laboratory information system of a laboratory serving a cosmopolitan population in central-west England for individuals aged 18 years and older if the estimated glomerular filtration rate was ≥60 mL/min, serum 25-hydroxyvitamin D was >50 nmol/L, and serum albumin-adjusted calcium and serum phosphate were within reference intervals. Age-specific reference intervals for Abbott iPTH were derived by an indirect method using the refineR algorithm. Results PTH increased with age and correlated with age when controlled for 25-hydroxyvitamin D, estimated glomerular filtration rate, and adjusted calcium (r = 0.093, P < .001). The iPTH age-specific reference intervals for 4 age partitions of 18 to 45 years, 46 to 60 years, 61 to 80 years, and 81 to 95 years were 1.6 to 8.6 pmol/L, 1.8 to 9.5 pmol/L, 2.0 to 11.3 pmol/L, and 2.3 to 12.3 pmol/L, respectively. PTH was higher in women compared with men (P < .001). Sex-specific age-related reference intervals could not be derived because of the limited sample size. Conclusion Age-specific Abbott iPTH reference intervals were derived. Application of age-specific reference intervals will impact the diagnosis and management of normocalcemic hyperparathyroidism, based on current definitions, and secondary hyperparathyroidism. Additional studies are required to clarify the effect of sex and ethnicity on PTH.
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Affiliation(s)
- Tejas Kalaria
- Clinical Biochemistry, University Hospitals Birmingham NHS Foundation Trust, Birmingham, B15 2GW, UK
| | - Alexander J Lawson
- Clinical Biochemistry, University Hospitals Birmingham NHS Foundation Trust, Birmingham, B15 2GW, UK
| | - Joanne Duffy
- Clinical Biochemistry, University Hospitals Birmingham NHS Foundation Trust, Birmingham, B15 2GW, UK
| | | | - Steve Harris
- Black Country Pathology Services, The Royal Wolverhampton NHS Trust, Wolverhampton, WV10 0QP, UK
| | - Clare Ford
- Black Country Pathology Services, The Royal Wolverhampton NHS Trust, Wolverhampton, WV10 0QP, UK
| | - Rousseau Gama
- Black Country Pathology Services, The Royal Wolverhampton NHS Trust, Wolverhampton, WV10 0QP, UK
- School of Medicine and Clinical Practice, University of Wolverhampton, Wolverhampton, WV1 1LY, UK
| | - Craig Webster
- Clinical Biochemistry, University Hospitals Birmingham NHS Foundation Trust, Birmingham, B15 2GW, UK
| | - Tarekegn Geberhiwot
- Centre for Endocrinology, Diabetes, and Metabolism, Queen Elizabeth Hospital, Birmingham, B15 2TH, UK
- Institute of Metabolism and Systems Research, University of Birmingham, Birmingham, B15 2TT, UK
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Wermers RA. Incidence of Primary Hyperparathyroidism in the Current Era: Have We Finally Reached a Steady State? J Clin Endocrinol Metab 2023; 108:e1749-e1750. [PMID: 37170854 PMCID: PMC10655524 DOI: 10.1210/clinem/dgad267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Accepted: 05/09/2023] [Indexed: 05/13/2023]
Affiliation(s)
- Robert A Wermers
- Division of Endocrinology, Diabetes, Metabolism and Nutrition and Department of Medicine, Mayo Clinic, Rochester, MN 55905, USA
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