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Dawalibi A, Alosaimi AA, Mohammad KS. Balancing the Scales: The Dual Role of Interleukins in Bone Metastatic Microenvironments. Int J Mol Sci 2024; 25:8163. [PMID: 39125732 PMCID: PMC11311339 DOI: 10.3390/ijms25158163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2024] [Revised: 07/15/2024] [Accepted: 07/19/2024] [Indexed: 08/12/2024] Open
Abstract
Bone metastases, a common and debilitating consequence of advanced cancers, involve a complex interplay between malignant cells and the bone microenvironment. Central to this interaction are interleukins (ILs), a group of cytokines with critical roles in immune modulation and inflammation. This review explores the dualistic nature of pro-inflammatory and anti-inflammatory interleukins in bone metastases, emphasizing their molecular mechanisms, pathological impacts, and therapeutic potential. Pro-inflammatory interleukins, such as IL-1, IL-6, and IL-8, have been identified as key drivers in promoting osteoclastogenesis, tumor proliferation, and angiogenesis. These cytokines create a favorable environment for cancer cell survival and bone degradation, contributing to the progression of metastatic lesions. Conversely, anti-inflammatory interleukins, including IL-4, IL-10, and IL-13, exhibit protective roles by modulating immune responses and inhibiting osteoclast activity. Understanding these opposing effects is crucial for developing targeted therapies aimed at disrupting the pathological processes in bone metastases. Key signaling pathways, including NF-κB, JAK/STAT, and MAPK, mediate the actions of these interleukins, influencing tumor cell survival, immune cell recruitment, and bone remodeling. Targeting these pathways presents promising therapeutic avenues. Current treatment strategies, such as the use of denosumab, tocilizumab, and emerging agents like bimekizumab and ANV419, highlight the potential of interleukin-targeted therapies in mitigating bone metastases. However, challenges such as therapeutic resistance, side effects, and long-term efficacy remain significant hurdles. This review also addresses the potential of interleukins as diagnostic and prognostic biomarkers, offering insights into patient stratification and personalized treatment approaches. Interleukins have multifaceted roles that depend on the context, including the environment, cell types, and cellular interactions. Despite substantial progress, gaps in research persist, particularly regarding the precise mechanisms by which interleukins influence the bone metastatic niche and their broader clinical implications. While not exhaustive, this overview underscores the critical roles of interleukins in bone metastases and highlights the need for continued research to fully elucidate their complex interactions and therapeutic potential. Addressing these gaps will be essential for advancing our understanding and treatment of bone metastases in cancer patients.
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Affiliation(s)
- Ahmad Dawalibi
- Department of Anatomy, College of Medicine, Alfaisal University, Riyadh 11533, Saudi Arabia;
| | - Amal Ahmed Alosaimi
- College of Medicine, Imam Mohammad Ibn Saud Islamic University, Riyadh 11432, Saudi Arabia;
| | - Khalid S. Mohammad
- Department of Anatomy, College of Medicine, Alfaisal University, Riyadh 11533, Saudi Arabia;
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AL-Otaibi NE, Alotaibi AS, Albekairy NA, Shawaqfeh MS, Alotaibi M, Alharbi S, Alkatheri A, Albekairy AM. Assessment of Risk Factors Associated with Bone and Mineral Disease Post-Renal Transplantation: “The Experiences of Two Centers”. TRANSPLANT RESEARCH AND RISK MANAGEMENT 2021. [DOI: 10.2147/trrm.s338844] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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Tantisattamo E, Ho BT, Workeneh BT. Editorial: Metabolic Changes After Kidney Transplantation. Front Med (Lausanne) 2021; 8:709644. [PMID: 34307432 PMCID: PMC8297834 DOI: 10.3389/fmed.2021.709644] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Accepted: 05/31/2021] [Indexed: 01/21/2023] Open
Affiliation(s)
- Ekamol Tantisattamo
- Harold Simmons Center for Kidney Disease Research and Epidemiology, Division of Nephrology, Hypertension and Kidney Transplantation, Department of Medicine, University of California, Irvine School of Medicine, Orange, CA, United States.,Nephrology Section, Department of Medicine, Tibor Rubin Veterans Affairs Medical Center, Veterans Affairs Long Beach Healthcare System, Long Beach, CA, United States.,Multi-Organ Transplant Center, Section of Nephrology, Department of Internal Medicine, William Beaumont Hospital, Oakland University William Beaumont School of Medicine, Royal Oak, MI, United States
| | - Bing T Ho
- Comprehensive Transplant Center, Division of Nephrology and Hypertension, Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL, United States
| | - Biruh T Workeneh
- Section of Nephrology, University of Texas MD Anderson Cancer Center, Houston, TX, United States
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Jie J, Li W, Wang G, Xu X. FK506 ameliorates osteoporosis caused by osteoblast apoptosis via suppressing the activated CaN/NFAT pathway during oxidative stress. Inflamm Res 2021; 70:789-797. [PMID: 34165588 DOI: 10.1007/s00011-021-01452-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2021] [Revised: 03/04/2021] [Accepted: 03/06/2021] [Indexed: 11/28/2022] Open
Abstract
OBJECTIVE Osteoporosis is affecting the health of postmenopausal women in the world. In case of that, we explored whether FK-506 could ameliorate osteoporosis by inhibiting the activated CaN/NFAT pathway during oxidative stress. METHODS First, the castrated rat model is constructed through the bilateral ovariectomy. Hologic Discovery (S/N 80347) dual-energy X-ray absorptiometry assessed bone mineral density (BMD) implemented at left femur of rats. Next, hematoxylin-eosin (H&E) staining observed and calculated the changes of bone trabecular, mean trabecular plate separation (Tb.Sp), mean trabecular plate thickness (Tb.Th), and bone volume fraction (BV/TV). Then, CCK-8 assay, TUNEL assay, ALP kit and alizarin red staining detected the viability, apoptosis, alkaline phosphatase (ALP) activity, and capacity of mineralization respectively. At last, commercially available kits detected the levels of ROS and SOD in transfected MC3T3-E1 cells and bone tissues, and Western blot analysis detected proteins related to apoptosis and CaN/NFAT pathway. RESULTS FK-506 increased the BMD and changes of bone trabecular in female castrated rats. FK-506 inhibited the oxidative stress and apoptosis by suppressing the activated CaN/NFAT pathway. Low dose of FK-506 improved the viability, ALP activity, and mineralization capacity. What's more, it suppressed the apoptosis of H2O2-induced MC3T3-E1 cells, which was deteriorated by the high dose of FK-506. Briefly, low dose of FK-506 inhibited the oxidative stress by suppressing the activated CaN/NFAT pathway, while high dose of that further inhibited the oxidative stress by suppressing the CaN/NFAT pathway. CONCLUSION FK-506 ameliorates osteoporosis resulted from osteoblastic apoptosis which caused by suppressing the activated CaN/NFAT pathway during oxidative stress.
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Affiliation(s)
- Jian Jie
- Department of Orthopedics, Pukou Branch Hospital of JiangSu Province Hospital (Nanjing Pukou Central Hospital), 166 Shanghe Street, Jiangpu Street, Pukou District, Nanjing, 211800, Jiangsu, China
| | - Weilin Li
- Department of Orthopedics, Pukou Branch Hospital of JiangSu Province Hospital (Nanjing Pukou Central Hospital), 166 Shanghe Street, Jiangpu Street, Pukou District, Nanjing, 211800, Jiangsu, China
| | - Guihua Wang
- Department of Orthopedics, Pukou Branch Hospital of JiangSu Province Hospital (Nanjing Pukou Central Hospital), 166 Shanghe Street, Jiangpu Street, Pukou District, Nanjing, 211800, Jiangsu, China
| | - Xiaoming Xu
- Department of Orthopedics, Pukou Branch Hospital of JiangSu Province Hospital (Nanjing Pukou Central Hospital), 166 Shanghe Street, Jiangpu Street, Pukou District, Nanjing, 211800, Jiangsu, China.
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KARADUMAN U, KARADUMAN B, ÇELİK İ, GÜRSEL M. The Effects of Cyclosporine and Tacrolimus on Gingiva and Alveolar Bone of Rats. CLINICAL AND EXPERIMENTAL HEALTH SCIENCES 2021. [DOI: 10.33808/clinexphealthsci.835833] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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6
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Nash A, Samoylova M, Leuthner T, Zhu M, Lin L, Meyer JN, Brennan TV. Effects of Immunosuppressive Medications on Mitochondrial Function. J Surg Res 2020; 249:50-57. [PMID: 31918330 PMCID: PMC7136143 DOI: 10.1016/j.jss.2019.12.010] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2019] [Revised: 11/14/2019] [Accepted: 12/06/2019] [Indexed: 12/12/2022]
Abstract
BACKGROUND Immunosuppressive medications are widely used for the prevention of allograft rejection in transplantation and graft-versus-host disease after allogeneic hematopoietic stem cell transplantation. Despite their clinical utility, these medications are accompanied by multiple off-target effects, some of which may be mediated by their effects on mitochondria. METHODS We examined the effect of commonly used immunosuppressive reagents, mycophenolate mofetil (MMF), cyclosporine A (CsA), rapamycin, and tacrolimus on mitochondrial function in human T-cells. T-cells were cultured in the presence of immunosuppressive medications in a range of therapeutic doses. After incubation, mitochondrial membrane potential, reactive oxygen species (ROS) production, and apoptotic cell death were measured by flow cytometry after staining with DiOC6, MitoSOX Red, and Annexin V and 7-AAD, respectively. Increases in cytosolic cytochrome c were demonstrated by Western blot. T-cell basal oxygen consumption rates were measured using a Seahorse bioanalyzer. RESULTS T-cells demonstrated significant levels of mitochondrial depolarization after treatment with therapeutic levels of MMF but not after treatment with CsA, tacrolimus, or rapamycin. Only MMF induced T-cell ROS production and induced significant levels of apoptotic cell death that were associated with increased levels of cytosolic cytochrome c. MMF decreased T-cell basal oxygen consumption within its therapeutic range, and CsA demonstrated a trend toward this result. CONCLUSIONS The impairment of mitochondrial function by commonly used immunosuppressive reagents may impair T-cell differentiation and function by decreasing energy production, producing toxic ROS, and inducing apoptotic cell death.
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Affiliation(s)
- Amanda Nash
- Department of Surgery, Duke University Medical Center, Durham, North Carolina
| | - Mariya Samoylova
- Department of Surgery, Duke University Medical Center, Durham, North Carolina
| | - Tess Leuthner
- Nicholas School of the Environment, Duke University, Durham, North Carolina
| | - Minghua Zhu
- Department of Surgery, Duke University Medical Center, Durham, North Carolina
| | - Liwen Lin
- Department of Surgery, Duke University Medical Center, Durham, North Carolina
| | - Joel N Meyer
- Nicholas School of the Environment, Duke University, Durham, North Carolina
| | - Todd V Brennan
- Department of Surgery, Cedars-Sinai Medical Center, Los Angeles, California.
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Prytuła A, Cransberg K, Raes A. Drug-metabolizing enzymes CYP3A as a link between tacrolimus and vitamin D in renal transplant recipients: is it relevant in clinical practice? Pediatr Nephrol 2019; 34:1201-1210. [PMID: 30058048 DOI: 10.1007/s00467-018-4030-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/30/2018] [Revised: 07/10/2018] [Accepted: 07/20/2018] [Indexed: 01/08/2023]
Abstract
CYP3A enzymes are involved in the metabolism of calcineurin inhibitor tacrolimus as well as vitamin D. In this review, we summarize the clinical aspects of CYP3A-mediated metabolism of tacrolimus and vitamin D with emphasis on the influence of single-nucleotide polymorphisms on tacrolimus disposition. We describe the utility of 4β hydroxycholesterol as a marker of CYP3A activity. Then, we discuss the possible interaction between calcineurin inhibitors and vitamin D in solid organ transplant recipients. Also, we review other mechanisms which may contribute to side effects of calcineurin inhibitors on bone. Lastly, suggestions for future research and clinical perspectives are discussed.
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Affiliation(s)
- Agnieszka Prytuła
- Paediatric Nephrology and Rheumatology Department, Ghent University Hospital, C Heymanslaan 10, 9000, Ghent, Belgium.
| | - Karlien Cransberg
- Paediatric Nephrology Department, Erasmus MC- Sophia Children's Hospital, Rotterdam, the Netherlands
| | - Ann Raes
- Paediatric Nephrology and Rheumatology Department, Ghent University Hospital, C Heymanslaan 10, 9000, Ghent, Belgium.,Safepedrug Unit, Ghent, Belgium
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8
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Gebauer J, Higham C, Langer T, Denzer C, Brabant G. Long-Term Endocrine and Metabolic Consequences of Cancer Treatment: A Systematic Review. Endocr Rev 2019; 40:711-767. [PMID: 30476004 DOI: 10.1210/er.2018-00092] [Citation(s) in RCA: 77] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/12/2018] [Accepted: 06/21/2018] [Indexed: 02/08/2023]
Abstract
The number of patients surviving ≥5 years after initial cancer diagnosis has significantly increased during the last decades due to considerable improvements in the treatment of many cancer entities. A negative consequence of this is that the emergence of long-term sequelae and endocrine disorders account for a high proportion of these. These late effects can occur decades after cancer treatment and affect up to 50% of childhood cancer survivors. Multiple predisposing factors for endocrine late effects have been identified, including radiation, sex, and age at the time of diagnosis. A systematic literature search has been conducted using the PubMed database to offer a detailed overview of the spectrum of late endocrine disorders following oncological treatment. Most data are based on late effects of treatment in former childhood cancer patients for whom specific guidelines and recommendations already exist, whereas current knowledge concerning late effects in adult-onset cancer survivors is much less clear. Endocrine sequelae of cancer therapy include functional alterations in hypothalamic-pituitary, thyroid, parathyroid, adrenal, and gonadal regulation as well as bone and metabolic complications. Surgery, radiotherapy, chemotherapy, and immunotherapy all contribute to these sequelae. Following irradiation, endocrine organs such as the thyroid are also at risk for subsequent malignancies. Although diagnosis and management of functional and neoplastic long-term consequences of cancer therapy are comparable to other causes of endocrine disorders, cancer survivors need individually structured follow-up care in specialized surveillance centers to improve care for this rapidly growing group of patients.
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Affiliation(s)
- Judith Gebauer
- Experimental and Clinical Endocrinology, University Hospital of Schleswig-Holstein, Campus Luebeck, Luebeck, Germany
| | - Claire Higham
- Department of Endocrinology, Christie Hospital NHS Foundation Trust, Manchester, United Kingdom.,Manchester Academic Health Science Centre, University of Manchester, Manchester, United Kingdom
| | - Thorsten Langer
- Division of Pediatric Hematology and Oncology, University Hospital of Schleswig-Holstein, Campus Luebeck, Luebeck, Germany
| | - Christian Denzer
- Department of Pediatrics and Adolescent Medicine, Division of Pediatric Endocrinology and Diabetes, Ulm University Medical Center, Ulm, Germany
| | - Georg Brabant
- Experimental and Clinical Endocrinology, University Hospital of Schleswig-Holstein, Campus Luebeck, Luebeck, Germany.,Department of Endocrinology, Christie Hospital NHS Foundation Trust, Manchester, United Kingdom
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Florenzano P, Ferreira C, Nesterova G, Roberts MS, Tella SH, de Castro LF, Brown SM, Whitaker A, Pereira RC, Bulas D, Gafni RI, Salusky IB, Gahl WA, Collins MT. Skeletal Consequences of Nephropathic Cystinosis. J Bone Miner Res 2018; 33:1870-1880. [PMID: 29905968 DOI: 10.1002/jbmr.3522] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/25/2018] [Revised: 05/18/2018] [Accepted: 06/06/2018] [Indexed: 01/03/2023]
Abstract
Nephropathic cystinosis is a rare lysosomal storage disorder. Patients present in the first year of life with renal Fanconi syndrome that evolves to progressive chronic kidney disease (CKD). Despite the multiple risk factors for bone disease, the frequency and severity of skeletal disorders in nephropathic cystinosis have not been described. We performed systematic bone and mineral evaluations of subjects with cystinosis seen at the NIH (n = 30), including history and physical examination, serum and urine biochemistries, DXA, vertebral fracture assessment, skeletal radiographs, and renal ultrasound. Additionally, histomorphometric analyses are reported on six subjects seen at the UCLA Bone and Mineral Metabolism Clinic. In NIH subjects, mean age was 20 years (range, 5 to 44 years), 60% were CKD stages G1 to G4, and 40% had a renal transplant. Mean bone mineral density (BMD) Z-scores were decreased in the femoral neck, total hip, and 1/3 radius (p < 0.05). Low bone mass at one or more sites was present in 46% of subjects. Twenty-seven percent of subjects reported one or more long bone fractures. Thirty-two percent of subjects had incidental vertebral fractures, which were unrelated to transplant status. Long-bone deformity/bowing was present in 64%; 50% had scoliosis. Diffuse osteosclerosis was present in 21% of evaluated subjects. Risk factors included CKD, phosphate wasting, hypercalciuria, secondary hyperparathyroidism, hypovitaminosis D, male hypogonadism, metabolic acidosis, and glucocorticoid/immunosuppressive therapy. Sixty-one percent of the non-transplanted subjects had ultrasonographic evidence of nephrocalcinosis or nephrolithiasis. Histomorphometric analyses showed impaired mineralization in four of six studied subjects. We conclude that skeletal deformities, decreased bone mass, and vertebral fractures are common and relevant complications of nephropathic cystinosis, even before renal transplantation. Efforts to minimize risk factors for skeletal disease include optimizing mineral metabolism and hormonal status, combined with monitoring for nephrocalcinosis/nephrolithiasis. © 2018 This article is a U.S. Government work and is in the public domain in the USA.
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Affiliation(s)
- Pablo Florenzano
- Section on Skeletal Disorders and Mineral Homeostasis, National Institutes of Dental and Craniofacial Research (NIDCR), National Institutes of Health (NIH), Bethesda, MD, USA.,Endocrinology Department, School of Medicine, Pontificia Universidad Catolica de Chile, Santiago, Chile
| | - Carlos Ferreira
- Medical Genetics Branch, National Human Genome Research Institute (NHGRI), National Institutes of Health (NIH), Bethesda, MD, USA
| | - Galina Nesterova
- Medical Genetics Branch, National Human Genome Research Institute (NHGRI), National Institutes of Health (NIH), Bethesda, MD, USA
| | - Mary Scott Roberts
- Section on Skeletal Disorders and Mineral Homeostasis, National Institutes of Dental and Craniofacial Research (NIDCR), National Institutes of Health (NIH), Bethesda, MD, USA
| | - Sri Harsha Tella
- Section on Skeletal Disorders and Mineral Homeostasis, National Institutes of Dental and Craniofacial Research (NIDCR), National Institutes of Health (NIH), Bethesda, MD, USA
| | - Luis Fernandez de Castro
- Section on Skeletal Disorders and Mineral Homeostasis, National Institutes of Dental and Craniofacial Research (NIDCR), National Institutes of Health (NIH), Bethesda, MD, USA
| | - Sydney M Brown
- Section on Skeletal Disorders and Mineral Homeostasis, National Institutes of Dental and Craniofacial Research (NIDCR), National Institutes of Health (NIH), Bethesda, MD, USA
| | - Adom Whitaker
- Section on Skeletal Disorders and Mineral Homeostasis, National Institutes of Dental and Craniofacial Research (NIDCR), National Institutes of Health (NIH), Bethesda, MD, USA
| | - Renata C Pereira
- Division of Nephrology, Department of Pediatrics, David Geffen School of Medicine, University of California, Los Angeles (UCLA), Los Angeles, CA, USA
| | - Dorothy Bulas
- Division of Radiology, Children's National Health System, Washington, DC, USA
| | - Rachel I Gafni
- Section on Skeletal Disorders and Mineral Homeostasis, National Institutes of Dental and Craniofacial Research (NIDCR), National Institutes of Health (NIH), Bethesda, MD, USA
| | - Isidro B Salusky
- Division of Nephrology, Department of Pediatrics, David Geffen School of Medicine, University of California, Los Angeles (UCLA), Los Angeles, CA, USA
| | - William A Gahl
- Medical Genetics Branch, National Human Genome Research Institute (NHGRI), National Institutes of Health (NIH), Bethesda, MD, USA
| | - Michael T Collins
- Section on Skeletal Disorders and Mineral Homeostasis, National Institutes of Dental and Craniofacial Research (NIDCR), National Institutes of Health (NIH), Bethesda, MD, USA
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Vangala C, Pan J, Cotton RT, Ramanathan V. Mineral and Bone Disorders After Kidney Transplantation. Front Med (Lausanne) 2018; 5:211. [PMID: 30109232 PMCID: PMC6079303 DOI: 10.3389/fmed.2018.00211] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Accepted: 07/09/2018] [Indexed: 12/16/2022] Open
Abstract
The risk of mineral and bone disorders among patients with chronic kidney disease is substantially elevated, owing largely to alterations in calcium, phosphorus, vitamin D, parathyroid hormone, and fibroblast growth factor 23. The interwoven relationship among these minerals and hormones results in maladaptive responses that are differentially affected by the process of kidney transplantation. Interpretation of conventional labs, imaging, and other fracture risk assessment tools are not standardized in the post-transplant setting. Post-transplant bone disease is not uniformly improved and considerable variation exists in monitoring and treatment practices. A spectrum of abnormalities such as hypophosphatemia, hypercalcemia, hyperparathyroidism, osteomalacia, osteopenia, and osteoporosis are commonly encountered in the post-transplant period. Thus, reducing fracture risk and other bone-related complications requires recognition of these abnormalities along with the risk incurred by concomitant immunosuppression use. As kidney transplant recipients continue to age, the drivers of bone disease vary throughout the post-transplant period among persistent hyperparathyroidism, de novo hyperparathyroidism, and osteoporosis. The use of anti-resorptive therapies require understanding of different options and the clinical scenarios that warrant their use. With limited studies underscoring clinical events such as fractures, expert understanding of MBD physiology, and surrogate marker interpretation is needed to determine ideal and individualized therapy.
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Affiliation(s)
- Chandan Vangala
- Division of Nephrology and Solid-Organ Transplantation, Michael E. DeBakey VA Medical Center, Houston, TX, United States
| | - Jenny Pan
- Division of Nephrology and Solid-Organ Transplantation, Michael E. DeBakey VA Medical Center, Houston, TX, United States
| | - Ronald T Cotton
- Division of Abdominal Transplantation, Department of Surgery, Baylor College of Medicine, Houston, TX, United States
| | - Venkat Ramanathan
- Division of Nephrology and Solid-Organ Transplantation, Michael E. DeBakey VA Medical Center, Houston, TX, United States
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