Endocrinology and Metabolism

Original Articles

Calcium & Bone Metabolism
Effect of Vitamin D Supplementation on Risk of Fractures and Falls According to Dosage and Interval: A Meta-Analysis: Sung Hye Kong, Han Na Jang, Jung Hee Kim, Sang Wan Kim, Chan Soo Shin; Endocrinol Metab. 2022;37(2):344-358. Published online April 25, 2022; DOI: https://doi.org/10.3803/EnM.2021.1374

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Background
Although recent studies comparing various dosages and intervals of vitamin D supplementation have been published, it is yet to be elucidated whether there is an appropriate dose or interval to provide benefit regarding fracture risk. We aimed to assess the published evidence available to date regarding the putative beneficial effects of vitamin D supplements on fractures and falls according to various dosages and intervals.
Methods
We performed a meta-analysis of randomized controlled studies reporting associations between vitamin D supplementation and the risks of fractures and falls in PubMed, EMBASE, and Cochrane library. Studies with supplements of ergocalciferol or calcitriol, those with a number of event ≤10, or those with a follow-up duration of less than 6 months were also excluded.
Results
Thirty-two studies were included in the final analysis. Vitamin D supplementation with daily dose of 800 to 1,000 mg was associated with lower risks of osteoporotic fracture and fall (pooled relative risk [RR], 0.87; 95% confidence interval [CI], 0.78 to 0.97 and RR, 0.91; 95% CI, 0.85 to 0.98), while studies with <800 or >1,000 mg/day did not. Also, among intervals, daily administration of vitamin D was associated with the reduced risk of falls, while intermittent dose was not. Also, patients with vitamin D deficiency showed a significant risk reduction of falls after vitamin D supplementation.
Conclusion
Daily vitamin D dose of 800 to 1,000 IU was the most probable way to reduce the fracture and fall risk. Further studies designed with various regimens and targeted vitamin D levels are required to elucidate the benefits of vitamin D supplements.

Citations

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Association of vitamin and/or nutritional supplements with fall among patients with diabetes: A prospective study based on ACCORD and UK Biobank
Lingfang He, Tianqi Ma, Guogang Zhang, Xunjie Cheng, Yongping Bai
Frontiers in Nutrition.2023;[Epub] CrossRef
Vitamin D and Calcium in Osteoporosis, and the Role of Bone Turnover Markers: A Narrative Review of Recent Data from RCTs
Gavriela Voulgaridou, Sousana K. Papadopoulou, Paraskevi Detopoulou, Despoina Tsoumana, Constantinos Giaginis, Foivi S. Kondyli, Evgenia Lymperaki, Agathi Pritsa
Diseases.2023; 11(1): 29. CrossRef
Recent advances in the identification of related factors and preventive strategies of hip fracture
Yaohui Yu, Yudan Wang, Xiaoli Hou, Faming Tian
Frontiers in Public Health.2023;[Epub] CrossRef
Vitamin D for Clinical Diseases in Women: An Indispensable Factor in Medicine and Dentistry
Dario Calafiore, Leonzio Fortunato, Mario Migliario
Journal of Clinical Medicine.2022; 11(11): 3104. CrossRef
Malnutrition in Older Adults—Effect on Falls and Fractures: A Narrative Review
Malgorzata Kupisz-Urbanska, Ewa Marcinowska-Suchowierska
Nutrients.2022; 14(15): 3123. CrossRef
Role of vitamin D supplementation in the management of musculoskeletal diseases: update from an European Society of Clinical and Economical Aspects of Osteoporosis, Osteoarthritis and Musculoskeletal Diseases (ESCEO) working group
Thierry Chevalley, Maria Luisa Brandi, Kevin D. Cashman, Etienne Cavalier, Nicholas C. Harvey, Stefania Maggi, Cyrus Cooper, Nasser Al-Daghri, Oliver Bock, Olivier Bruyère, Mario Miguel Rosa, Bernard Cortet, Alfonso J. Cruz-Jentoft, Antonio Cherubini, Bes
Aging Clinical and Experimental Research.2022; 34(11): 2603. CrossRef

Calcium & Bone Metabolism
Association between Elevated Plasma Homocysteine and Low Skeletal Muscle Mass in Asymptomatic Adults: Jae-Hyeong Choi, Jin-Woo Seo, Mi-Yeon Lee, Yong-Taek Lee, Kyung Jae Yoon, Chul-Hyun Park; Endocrinol Metab. 2022;37(2):333-343. Published online February 8, 2022; DOI: https://doi.org/10.3803/EnM.2021.1202

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Background
Homocysteine has been drawing attention with a closed linkage with skeletal muscle. However, the association of hyperhomocysteinemia with decreased skeletal muscle mass remains unclear. We aimed to investigate the association of hyperhomocysteinemia with low skeletal muscle mass (LMM) in asymptomatic adults.
Methods
This was a cross-sectional study of 114,583 community-dwelling adults without cancer, stroke, or cardiovascular diseases who underwent measurements of plasma homocysteine and body composition analysis from 2012 to 2018. Hyperhomocysteinemia was defined as >15 μmol/L. Skeletal muscle mass index (SMI) was calculated based on appendicular muscle mass (kg)/height (m)². Participants were classified into three groups based on SMI: “normal,” “mildly low,” and “severely low.”
Results
The prevalence of hyperhomocysteinemia was the highest in subjects with severely LMM (12.9%), followed by those with mildly LMM (9.8%), and those with normal muscle mass (8.5%) (P for trend <0.001). In a multivariable logistic regression model, hyperhomocysteinemia was significantly associated with having a mildly LMM (odds ratio [OR], 1.305; 95% confidence interval [CI], 1.224 to 1.392) and severely LMM (OR, 1.958; 95% CI, 1.667 to 2.286), respectively. One unit increment of log-transformed homocysteine was associated with 1.360 and 2.169 times higher risk of having mildly LMM and severely LMM, respectively.
Conclusion
We demonstrated that elevated homocysteine has an independent association with LMM in asymptomatic adults, supporting that hyperhomocysteinemia itself can be a risk for decline in skeletal musculature.

Citations

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The role of the mitochondrial trans-sulfuration in cerebro-cardio renal dysfunction during trisomy down syndrome
Sathnur Pushpakumar, Mahavir Singh, Utpal Sen, N. Tyagi, Suresh C. Tyagi
Molecular and Cellular Biochemistry.2023;[Epub] CrossRef
Relationship between hyperhomocysteinemia and coexisting obesity with low skeletal muscle mass in asymptomatic adult population
Tae Kyung Yoo, Hye Chang Rhim, Yong-Taek Lee, Kyung Jae Yoon, Chul-Hyun Park
Scientific Reports.2022;[Epub] CrossRef
Causal effects of homocysteine levels on the components of sarcopenia: A two-sample mendelian randomization study
Hongwei Yu, Gan Luo, Tianwei Sun, Qiong Tang
Frontiers in Genetics.2022;[Epub] CrossRef
Association between serum homocysteine and sarcopenia among hospitalized older Chinese adults: a cross-sectional study
Bing Lu, Lingyu Shen, Haiqiong Zhu, Ling Xi, Wei Wang, Xiaojun Ouyang
BMC Geriatrics.2022;[Epub] CrossRef

Calcium & Bone Metabolism
Real-World Safety and Effectiveness of Denosumab in Patients with Osteoporosis: A Prospective, Observational Study in South Korea: Yumie Rhee, Dong-Gune Chang, Jeonghoon Ha, Sooa Kim, Yusun Lee, Euna Jo, Jung-Min Koh; Endocrinol Metab. 2022;37(3):497-505. Published online June 3, 2022; DOI: https://doi.org/10.3803/EnM.2022.1427

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Background
The efficacy and safety of denosumab have been established in a phase 3, randomized, placebo-controlled trial in Korean postmenopausal women with osteoporosis. This postmarketing surveillance study was aimed to investigate the safety and effectiveness of denosumab in Korean real-world clinical practice.
Methods
Patients with osteoporosis who had received denosumab per the Korean approved indications in the postmarketing setting between September 2014 and September 2019 were enrolled. The primary endpoint was the incidence of adverse events (AEs) and adverse drug reactions (ADRs). The secondary endpoint was the percent change from baseline in bone mineral density (BMD) of the lumbar spine, total hip, and femoral neck.
Results
Of the 3,221 patients enrolled, 3,185 were included in the safety analysis set; 2,973 (93.3%) were female, and the mean± standard deviation (SD) age was 68.9±9.9 years. The mean±SD study period was 350.0±71.4 days. AEs, fatal AEs, and ADRs occurred in 19.3%, 0.8%, and 1.6%, respectively. The most frequent AEs, occurring in >0.5% of patients, were dizziness (0.7%), arthralgia (0.7%), back pain (0.6%), and myalgia (0.6%). Hypocalcemia occurred in 0.3% of patients. There were no cases of osteonecrosis of the jaw and atypical femoral fracture. Mean±SD percent change from baseline in BMD of the lumbar spine, total hip, and femoral neck was 7.3%±23.6%, 3.6%±31.4%, and 3.2%±10.7%, respectively.
Conclusion
The safety and effectiveness of denosumab in Korean patients with osteoporosis in this study were comparable with those in the Korean randomized controlled trial, with no new safety findings.

Citations

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Adverse Effects of Denosumab in Kidney Transplant Recipients: A 20-Year Retrospective Single-Center Observation Study in Central Taiwan
Tsung-Yin Tsai, Zi-Hong You, Shang-Feng Tsai, Ming-Ju Wu, Tung-Min Yu, Ya-Wen Chuang, Yung-Chieh Lin, Ya-Lian Deng, Chiann-Yi Hsu, Cheng-Hsu Chen
Transplantation Proceedings.2023;[Epub] CrossRef
Persistence with Denosumab in Male Osteoporosis Patients: A Real-World, Non-Interventional Multicenter Study
Chaiho Jeong, Jeongmin Lee, Jinyoung Kim, Jeonghoon Ha, Kwanhoon Jo, Yejee Lim, Mee Kyoung Kim, Hyuk-Sang Kwon, Tae-Seo Sohn, Ki-Ho Song, Moo Il Kang, Ki-Hyun Baek
Endocrinology and Metabolism.2023; 38(2): 260. CrossRef
Denosumab

Reactions Weekly.2022; 1919(1): 221. CrossRef
Denosumab, an effective osteoporosis treatment option for men
Sung Hye Kong
The Korean Journal of Internal Medicine.2022; 37(5): 947. CrossRef

Calcium & Bone Metabolism
Decreased Serum Level of Sclerostin in Older Adults with Sarcopenia: Seong Hee Ahn, Hee-Won Jung, Eunju Lee, Ji Yeon Baek, Il-Young Jang, So Jeong Park, Jin Young Lee, Eunah Choi, Yun Sun Lee, Seongbin Hong, Beom-Jun Kim; Endocrinol Metab. 2022;37(3):487-496. Published online May 27, 2022; DOI: https://doi.org/10.3803/EnM.2022.1428

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Background
Although muscles and bones interact with each other through various secretory factors, the role of sclerostin, an osteocyte-secreted factor, on muscle metabolism has not been well studied. We investigated the levels of serum sclerostin in Korean older adults with sarcopenia.
Methods
Blood samples were collected from 129 participants who underwent evaluation of muscle mass and function in an outpatient geriatric clinic of a teaching hospital. Sarcopenia and related parameters were determined using cutoff values for the Asian population. Serum sclerostin levels were measured using an enzyme-linked immunosorbent assay.
Results
The mean age of the participants was 69.6 years, and 20 participants (15.5%) were classified as having sarcopenia. After adjusting for age, sex, and body mass index, serum sclerostin levels were significantly lower in participants with sarcopenia, low muscle mass, or weak muscle strength (P=0.003 to 0.045). Serum sclerostin levels were positively associated with skeletal muscle index and grip strength after adjusting for confounders (P=0.001 and P=0.003), whereas sarcopenic phenotype score showed a negative association (P=0.006). These increases in muscle mass and strength were also dose dependent as serum sclerostin levels increased (P for trends=0.003 and P for trends=0.015). Higher serum sclerostin levels were associated with lower odds ratio (ORs) for sarcopenia, low muscle mass, and weak muscle strength after adjusting for confounders (OR, 0.27 to 0.50; P<0.001 to 0.025).
Conclusion
Higher serum sclerostin levels were associated with a lower risk of sarcopenia, low muscle mass, and weak muscle strength in Korean older adults.

Citations

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Determinants of bone mass in older adults with normal- and overweight derived from the crosstalk with muscle and adipose tissue
Carina O. Walowski, Catrin Herpich, Janna Enderle, Wiebke Braun, Marcus Both, Mario Hasler, Manfred J. Müller, Kristina Norman, Anja Bosy-Westphal
Scientific Reports.2023;[Epub] CrossRef
Role of the Osteocyte in Musculoskeletal Disease
Anika Shimonty, Lynda F. Bonewald, Fabrizio Pin
Current Osteoporosis Reports.2023; 21(3): 303. CrossRef
Sclerostin as a Putative Myokine in Sarcopenia
Hyon-Seung Yi
Endocrinology and Metabolism.2022; 37(3): 430. CrossRef
Organokines, Sarcopenia, and Metabolic Repercussions: The Vicious Cycle and the Interplay with Exercise
Giulia Minniti, Letícia Maria Pescinini-Salzedas, Guilherme Almeida dos Santos Minniti, Lucas Fornari Laurindo, Sandra Maria Barbalho, Renata Vargas Sinatora, Lance Alan Sloan, Rafael Santos de Argollo Haber, Adriano Cressoni Araújo, Karina Quesada, Jesse
International Journal of Molecular Sciences.2022; 23(21): 13452. CrossRef

Review Article

Calcium & Bone Metabolism
Review and Update of the Risk Factors and Prevention of Antiresorptive-Related Osteonecrosis of the Jaw: Ha Young Kim; Endocrinol Metab. 2021;36(5):917-927. Published online October 21, 2021; DOI: https://doi.org/10.3803/EnM.2021.1170

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Antiresorptive-related osteonecrosis of the jaw (ARONJ) is a rare but serious adverse event of bisphosphonate or denosumab administration; it is associated with severe pain and a deteriorated quality of life. Since its first report in 2003, there have been many studies on its definition, epidemiology, pathophysiology, diagnosis, and treatment. Nevertheless, the epidemiology and mechanisms underlying this condition have not yet been fully delineated and several risk factors are known. Moreover, as there is no effective treatment currently available for osteonecrosis of the jaw, prevention is essential. Furthermore, close cooperation between prescribing physicians and dentists is important. The aim of this review was to provide up-to-date information regarding the risk factors and prevention of ARONJ from a physician’s perspective.

Citations

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When and how to stop denosumab therapy in a patient with osteoporosis
Eirena L. Goulden, Rachel K. Crowley
Clinical Endocrinology.2023; 98(5): 649. CrossRef
Safety and Efficacy of Pamidronate in Neonatal Hypercalcemia Caused by Subcutaneous Fat Necrosis: A Case Report
Stefano Martinelli, Marco Pitea, Italo Francesco Gatelli, Tara Raouf, Graziano Barera, Ottavio Vitelli
Frontiers in Pediatrics.2022;[Epub] CrossRef
Zoledronic acid for osteoporosis and associated low-energy fractures
S. S. Rodionova, A. F. Kolondaev, A. N. Torgashin, I. A. Solomyannik
Meditsinskiy sovet = Medical Council.2022; (21): 163. CrossRef

Original Article

Calcium & Bone Metabolism Big Data Articles (National Health Insurance Service Database)
Hip Fracture Risk According to Diabetic Kidney Disease Phenotype in a Korean Population: Seung Eun Lee, Juhwan Yoo, Kyoung-Ah Kim, Kyungdo Han, Han Seok Choi; Endocrinol Metab. 2022;37(1):148-158. Published online February 28, 2022; DOI: https://doi.org/10.3803/EnM.2021.1315

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Background
Diabetic kidney disease (DKD) is associated with an elevated risk of fractures. However, little is known about the association between proteinuric or non-proteinuric DKD and the risk of hip fracture. Thus, we investigated the incidence of hip fractures among Korean adults with type 2 diabetes mellitus (T2DM) stratified by DKD phenotype.
Methods
In this retrospective cohort study using the Korean National Health Insurance Service database, patients with T2DM who received at least one general health checkup between 2009 and 2012 were followed until the date of hip fracture, death, or December 31, 2018. We classified the DKD phenotype by proteinuria and estimated glomerular filtration rate (eGFR), as follows: no DKD (PU⁻GFR⁻), proteinuric DKD with normal eGFR (PU⁺GFR⁻), non-proteinuric DKD with reduced eGFR (PU⁻GFR⁺), and proteinuric DKD with reduced eGFR (PU⁺GFR⁺)
Results
The cumulative incidence of hip fractures was highest in the PU⁺GFR⁺ group, followed by the PU⁻GFR⁺ group and the PU⁺GFR⁻ group. After adjustment for confounding factors, the hazard ratio (HR) for hip fracture was still highest in the PU⁺GFR⁺ group. However, the PU⁺GFR⁻ group had a higher HR for hip fracture than the PU⁻GFR⁺ group (PU⁺GFR⁺ : HR, 1.69; 95% confidence interval [CI], 1.57 to 1.81; PU⁺GFR⁻ : HR, 1.37; 95% CI, 1.30 to 1.46; PU⁻GFR⁺ : HR, 1.20; 95% CI, 1.16 to 1.24 using the PU⁻GFR⁻ group as the reference category).
Conclusion
The present study demonstrated that DKD was significantly associated with a higher risk of hip fracture, with proteinuria as a major determinant.

Citations

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Fracture risks associated with sodium-glucose cotransporter-2 inhibitors in type 2 diabetes patients across eGFR and albuminuria categories: A population-based study in Hong Kong
David Tak Wai Lui, Tingting Wu, Eric Ho Man Tang, Ivan Chi Ho Au, Chi Ho Lee, Yu Cho Woo, Kathryn Choon Beng Tan, Carlos King Ho Wong
Diabetes Research and Clinical Practice.2023; 197: 110576. CrossRef
Diagnose und Management der Osteoporose bei Diabetes mellitus (Update 2023)
Christian Muschitz, Alexandra Kautzky-Willer, Yvonne Winhofer, Martina Rauner, Judith Haschka, Daniel Cejka, Robert Wakolbinger-Habel, Peter Pietschmann
Wiener klinische Wochenschrift.2023; 135(S1): 207. CrossRef
Association between exercise and risk of fractures in new-onset type 2 diabetes: a retrospective cohort study
Seung Eun Lee, Juhwan Yoo, Bong-Seong Kim, Kyoung-Ah Kim, Kyungdo Han, Han Seok Choi
Archives of Osteoporosis.2023;[Epub] CrossRef

Review Articles

Calcium & Bone Metabolism
Discontinuing Denosumab: Can It Be Done Safely? A Review of the Literature: Wei Lin Tay, Donovan Tay; Endocrinol Metab. 2022;37(2):183-194. Published online April 14, 2022; DOI: https://doi.org/10.3803/EnM.2021.1369

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Denosumab, which has been approved for the treatment of osteoporosis since 2010, is a fully humanised monoclonal antibody against a cytokine, receptor activator of nuclear factor kappa B ligand (RANKL), involved in bone resorption. Continued use of denosumab results in a potent and sustained decrease in bone turnover, an increase in bone mineral density (BMD), and a reduction in vertebral and hip fractures. The anti-resorptive effects of denosumab are reversible upon cessation, and this reversal is accompanied by a transient marked increase in bone turnover that is associated with bone loss, and of concern, an increased risk of multiple vertebral fractures. In this review, we outline the effects of denosumab withdrawal on bone turnover markers, BMD, histomorphometry, and fracture risk. We provide an update on recent clinical trials that sought to answer how clinicians can transition away from denosumab safely with follow-on therapy to mitigate bone loss and summarise the recommendations of various international guidelines.

Citations

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Loss of lower extremity bone mineral density 1 year after denosumab is discontinued in persons with subacute spinal cord injury
Christopher M. Cirnigliaro, Michael F. La Fountaine, J. Scott Parrott, Steven C. Kirshblum, Susan J. Sauer, Sue A. Shapses, Isa A. McClure, William A. Bauman
Osteoporosis International.2023; 34(4): 741. CrossRef
Persistence with Denosumab in Male Osteoporosis Patients: A Real-World, Non-Interventional Multicenter Study
Chaiho Jeong, Jeongmin Lee, Jinyoung Kim, Jeonghoon Ha, Kwanhoon Jo, Yejee Lim, Mee Kyoung Kim, Hyuk-Sang Kwon, Tae-Seo Sohn, Ki-Ho Song, Moo Il Kang, Ki-Hyun Baek
Endocrinology and Metabolism.2023; 38(2): 260. CrossRef

Calcium & Bone Metabolism
Applications of Machine Learning in Bone and Mineral Research: Sung Hye Kong, Chan Soo Shin; Endocrinol Metab. 2021;36(5):928-937. Published online October 21, 2021; DOI: https://doi.org/10.3803/EnM.2021.1111

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In this unprecedented era of the overwhelming volume of medical data, machine learning can be a promising tool that may shed light on an individualized approach and a better understanding of the disease in the field of osteoporosis research, similar to that in other research fields. This review aimed to provide an overview of the latest studies using machine learning to address issues, mainly focusing on osteoporosis and fractures. Machine learning models for diagnosing and classifying osteoporosis and detecting fractures from images have shown promising performance. Fracture risk prediction is another promising field of research, and studies are being conducted using various data sources. However, these approaches may be biased due to the nature of the techniques or the quality of the data. Therefore, more studies based on the proposed guidelines are needed to improve the technical feasibility and generalizability of artificial intelligence algorithms.

Citations

Citations to this article as recorded by

Development and validation of common data model-based fracture prediction model using machine learning algorithm
Sung Hye Kong, Sihyeon Kim, Yisak Kim, Jung Hee Kim, Kwangsoo Kim, Chan Soo Shin
Osteoporosis International.2023;[Epub] CrossRef
Quality use of artificial intelligence in medical imaging: What do radiologists need to know?
Stacy K Goergen, Helen ML Frazer, Sandeep Reddy
Journal of Medical Imaging and Radiation Oncology.2022; 66(2): 225. CrossRef

Original Article

Calcium & Bone Metabolism
Development of a Spine X-Ray-Based Fracture Prediction Model Using a Deep Learning Algorithm: Sung Hye Kong, Jae-Won Lee, Byeong Uk Bae, Jin Kyeong Sung, Kyu Hwan Jung, Jung Hee Kim, Chan Soo Shin; Endocrinol Metab. 2022;37(4):674-683. Published online August 5, 2022; DOI: https://doi.org/10.3803/EnM.2022.1461

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Background
Since image-based fracture prediction models using deep learning are lacking, we aimed to develop an X-ray-based fracture prediction model using deep learning with longitudinal data.
Methods
This study included 1,595 participants aged 50 to 75 years with at least two lumbosacral radiographs without baseline fractures from 2010 to 2015 at Seoul National University Hospital. Positive and negative cases were defined according to whether vertebral fractures developed during follow-up. The cases were divided into training (n=1,416) and test (n=179) sets. A convolutional neural network (CNN)-based prediction algorithm, DeepSurv, was trained with images and baseline clinical information (age, sex, body mass index, glucocorticoid use, and secondary osteoporosis). The concordance index (C-index) was used to compare performance between DeepSurv and the Fracture Risk Assessment Tool (FRAX) and Cox proportional hazard (CoxPH) models.
Results
Of the total participants, 1,188 (74.4%) were women, and the mean age was 60.5 years. During a mean follow-up period of 40.7 months, vertebral fractures occurred in 7.5% (120/1,595) of participants. In the test set, when DeepSurv learned with images and clinical features, it showed higher performance than FRAX and CoxPH in terms of C-index values (DeepSurv, 0.612; 95% confidence interval [CI], 0.571 to 0.653; FRAX, 0.547; CoxPH, 0.594; 95% CI, 0.552 to 0.555). Notably, the DeepSurv method without clinical features had a higher C-index (0.614; 95% CI, 0.572 to 0.656) than that of FRAX in women.
Conclusion
DeepSurv, a CNN-based prediction algorithm using baseline image and clinical information, outperformed the FRAX and CoxPH models in predicting osteoporotic fracture from spine radiographs in a longitudinal cohort.

Citations

Citations to this article as recorded by

A Meaningful Journey to Predict Fractures with Deep Learning
Jeonghoon Ha
Endocrinology and Metabolism.2022; 37(4): 617. CrossRef
New Horizons: Artificial Intelligence Tools for Managing Osteoporosis
Hans Peter Dimai
The Journal of Clinical Endocrinology & Metabolism.2022;[Epub] CrossRef

Review Articles

Calcium & Bone Metabolism
Interplay of Vitamin D and CYP3A4 Polymorphisms in Endocrine Disorders and Cancer: Siva Swapna Kasarla, Vannuruswamy Garikapati, Yashwant Kumar, Sujatha Dodoala; Endocrinol Metab. 2022;37(3):392-407. Published online June 3, 2022; DOI: https://doi.org/10.3803/EnM.2021.1349

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Vitamin D has received considerable optimistic attention as a potentially important factor in many pathological states over the past few decades. However, the proportion of the active form of vitamin D metabolites responsible for biological activity is highly questionable in disease states due to flexible alterations in the enzymes responsible for their metabolism. For instance, CYP3A4 plays a crucial role in the biotransformation of vitamin D and other drug substances. Food-drug and/or drug-drug interactions, the disease state, genetic polymorphism, age, sex, diet, and environmental factors all influence CYP3A4 activity. Genetic polymorphisms in CYP450-encoding genes have received considerable attention in the past few decades due to their extensive impact on the pharmacokinetic and dynamic properties of drugs and endogenous substances. In this review, we focused on CYP3A4 polymorphisms and their interplay with vitamin D metabolism and summarized the role of vitamin D in calcium homeostasis, bone diseases, diabetes, cancer, other diseases, and drug substances. We also reviewed clinical observations pertaining to CYP3A4 polymorphisms among the aforementioned disease conditions. In addition, we highlighted the future perspectives of studying the pharmacogenetics of CYP3A4, which may have potential clinical significance for developing novel diagnostic genetic markers that will ascertain disease risk and progression.

Citations

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Heat stress as a potential risk factor for vitamin D deficiency
Martina Balducci, Letizia Pruccoli, Andrea Tarozzi
Medical Hypotheses.2023; 176: 111085. CrossRef

Calcium & Bone Metabolism
Updates on Paget’s Disease of Bone: Yong Jun Choi, Young Bae Sohn, Yoon-Sok Chung; Endocrinol Metab. 2022;37(5):732-743. Published online October 25, 2022; DOI: https://doi.org/10.3803/EnM.2022.1575

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Paget’s disease of the bone is a prevalent bone disease characterized by disorganized bone remodeling; however, it is comparatively uncommon in East Asian countries, including China, Japan, and Korea. The exact cause still remains unknown. In genetically susceptible individuals, environmental triggers such as paramyxoviral infections are likely to cause the disease. Increased osteoclast activity results in increased bone resorption, which attracts osteoblasts and generates new bone matrix. Fast bone resorption and formation lead to the development of disorganized bone tissue. Increasing serum alkaline phosphatase or unique radiographic lesions may serve as the diagnostic indicators. Common symptoms include bone pain, bowing of the long bones, an enlarged skull, and hearing loss. The diagnosis is frequently confirmed by radiographic and nuclear scintigraphy of the bone. Further, bisphosphonates such as zoledronic acid and pamidronate are effective for its treatment. Moreover, biochemical monitoring is superior to the symptoms as a recurrence indicator. This article discusses the updates of Paget’s disease of bone with a clinical case.

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Newly Diagnosed Monostotic Paget’s Disease of Bone during Living Kidney Donor Candidate Evaluation
Diana Jędrzejuk, Paweł Poznański, Paweł Szewczyk, Oktawia Mazanowska, Marek Bolanowski, Magdalena Krajewska, Dorota Kamińska
Biomedicines.2023; 11(2): 401. CrossRef

Editorial

Calcium & Bone Metabolism
Sclerostin as a Putative Myokine in Sarcopenia: Hyon-Seung Yi; Endocrinol Metab. 2022;37(3):430-431. Published online June 29, 2022; DOI: https://doi.org/10.3803/EnM.2022.303

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Citations

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Organokines, Sarcopenia, and Metabolic Repercussions: The Vicious Cycle and the Interplay with Exercise
Giulia Minniti, Letícia Maria Pescinini-Salzedas, Guilherme Almeida dos Santos Minniti, Lucas Fornari Laurindo, Sandra Maria Barbalho, Renata Vargas Sinatora, Lance Alan Sloan, Rafael Santos de Argollo Haber, Adriano Cressoni Araújo, Karina Quesada, Jesse
International Journal of Molecular Sciences.2022; 23(21): 13452. CrossRef

Review Articles

Calcium & Bone Metabolism
A Key Metabolic Regulator of Bone and Cartilage Health: Elizabeth Pérez-Hernández, Jesús Javier Pastrana-Carballo, Fernando Gómez-Chávez, Ramesh C. Gupta, Nury Pérez-Hernández; Endocrinol Metab. 2022;37(4):559-574. Published online August 8, 2022; DOI: https://doi.org/10.3803/EnM.2022.1443

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Abstract PDF PubReader ePub Crossref - TDM: Taurine, a cysteine-derived zwitterionic sulfonic acid, is a common ingredient in energy drinks and is naturally found in fish and other seafood. In humans, taurine is produced mainly in the liver, and it can also be obtained from food. In target tissues, such as the retina, heart, and skeletal muscle, it functions as an essential antioxidant, osmolyte, and antiapoptotic agent. Taurine is also involved in energy metabolism and calcium homeostasis. Taurine plays a considerable role in bone growth and development, and high-profile reports have demonstrated the importance of its metabolism for bone health. However, these reports have not been collated for more than 10 years. Therefore, this review focuses on taurine–bone interactions and covers recently discovered aspects of taurine’s effects on osteoblastogenesis, osteoclastogenesis, bone structure, and bone pathologies (e.g., osteoporosis and fracture healing), with due attention to the taurine–cartilage relationship.

Calcium & Bone Metabolism
Update on Preoperative Parathyroid Localization in Primary Hyperparathyroidism: Hye-Sun Park, Namki Hong, Jong Ju Jeong, Mijin Yun, Yumie Rhee; Endocrinol Metab. 2022;37(5):744-755. Published online October 25, 2022; DOI: https://doi.org/10.3803/EnM.2022.1589

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Abstract PDF PubReader ePub Crossref - TDM: Parathyroidectomy is the treatment of choice for primary hyperparathyroidism when the clinical criteria are met. Although bilateral neck exploration is traditionally the standard method for surgery, minimally invasive parathyroidectomy (MIP), or focused parathyroidectomy, has been widely accepted with comparable curative outcomes. For successful MIP, accurate preoperative localization of parathyroid lesions is essential. However, no consensus exists on the optimal approach for localization. Currently, ultrasonography and technetium-99m-sestamibi–single photon emission computed tomography/computed tomography are widely accepted in most cases. However, exact localization cannot always be achieved, especially in cases with multiglandular disease, ectopic glands, recurrent disease, and normocalcemic primary hyperparathyroidism. Therefore, new modalities for preoperative localization have been developed and evaluated. Positron emission tomography/computed tomography and parathyroid venous sampling have demonstrated improvements in sensitivity and accuracy. Both anatomical and functional information can be obtained by combining these methods. As each approach has its advantages and disadvantages, the localization study should be deliberately chosen based on each patient’s clinical profile, costs, radiation exposure, and the availability of experienced experts. In this review, we summarize various methods for the localization of hyperfunctioning parathyroid tissues in primary hyperparathyroidism.

Original Article

Calcium & Bone Metabolism
Bone Mineral Density Screening Interval and Transition to Osteoporosis in Asian Women: Hyunju Park, Heera Yang, Jung Heo, Hye Won Jang, Jae Hoon Chung, Tae Hyuk Kim, Yong-Ki Min, Sun Wook Kim; Endocrinol Metab. 2022;37(3):506-512. Published online June 9, 2022; DOI: https://doi.org/10.3803/EnM.2022.1429

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Abstract PDF PubReader ePub Crossref - TDM: Background
Bone mineral density (BMD) testing is indicated for women aged 65 years, but screening strategies for osteoporosis are controversial. Currently, there is no study focusing on the BMD testing interval in Asian populations. The current study aimed to evaluate the estimated time interval for screening osteoporosis.
Methods
We conducted a study of 6,385 subjects aged 50 years and older who underwent dual-energy X-ray absorptiometry screening more than twice at Samsung Medical Center as participants in a routine health checkup. Subjects were divided based on baseline T-score into mild osteopenia (T-score, <–1.0 to >–1.5), moderate osteopenia (T-score, ≤–1.5 to >–2.0), and severe osteopenia (T-score, ≤–2.0 to >–2.5). Information about personal medical and social history was collected by a structured questionnaire.
Results
The adjusted estimated BMD testing interval for 10% of the subjects to develop osteoporosis was 13.2 years in mild osteopenia, 5.0 years in moderate osteopenia, and 1.5 years in severe osteopenia.
Conclusion
Our study provides extended information about BMD screening intervals in Asian female population. Baseline T-score was important for predicting BMD screening interval, and repeat BMD testing within 5 years might not be necessary in mild osteopenia subjects.

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