51
|
Premaor MO, Das TK, Debiram I, Parker RA, Ninkovic M, Alexander GT, Compston JE. Fracture incidence after liver transplantation: results of a 10-year audit. QJM 2011; 104:599-606. [PMID: 21385830 PMCID: PMC3116679 DOI: 10.1093/qjmed/hcr025] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
BACKGROUND High rates of fracture following liver transplantation were reported in earlier years, but the impact of subsequent changes in immune suppression and the introduction of bone-protective therapy on fracture rate have not been reported. AIM The aim of this study was to document clinical fracture incidence during the period 1998-2008 in a single transplant centre, following the introduction of a bone management protocol. DESIGN It was designed as a retrospective cohort. METHODS Records were retrieved from 531 of 592 eligible patients in an audit of all patients undergoing a first liver transplant during the 10-year period. All fractures were verified radiologically. RESULTS The mean follow-up period was 61.4 months. Prior to transplantation 5.6% of patients had a history of fracture. Incident clinical fractures following transplantation were recorded in just 15 (3.5%) patients. The most common fracture site was the spine and the median time from transplant to fracture was 26 months (range 2-83 months). CONCLUSION There was a low fracture rate in patients undergoing liver transplantation in this centre over the past 10 years. This rate is lower than that in previous reports, which is likely to reflect the use of lower doses of prednisolone for immune suppression and the administration of bone-protective therapy to high-risk patients.
Collapse
Affiliation(s)
- M O Premaor
- Department of Medicine, Addenbrooke's Hospital, Cambridgeshire CB2 0QQ, UK.
| | | | | | | | | | | | | |
Collapse
|
52
|
Abstract
Vitamin D deficiency is prevalent among patients with end-stage organ failure awaiting transplant. Low serum 25-hydroxyvitamin D (25-OHD) levels in these patients may be related to many disease-specific factors, as well as decreased sunlight exposure and limited intake of foods containing vitamin D. Low serum 25-OHD levels are also extremely common following solid organ transplantation, both during the immediate postoperative period and in long-term graft recipients. Demographic and lifestyle factors are important in determining D status in transplant recipients. Worse vitamin D status is associated with poorer general health, lower albumin, and even decreased survival among these patients. Although several studies have demonstrated that active forms of vitamin D and its analogues prevent bone loss following transplantation, the data do not show consistent benefit. These therapies may have particular utility after renal transplantation. However, given the narrow therapeutic window with respect to hypercalcemia and hypercalciuria, and the demonstrated efficacy of bisphosphonates to prevent post-transplantation bone loss, we regard these agents as adjunctive rather than primary therapy for transplantation osteoporosis. The effects of 1,25(OH)(2)D on the immune system, which are still being elucidated, may have potential for reducing infections and preventing allograft rejection after transplantation.
Collapse
Affiliation(s)
- E M Stein
- Department of Medicine, Columbia University Medical Center, 630 West 168th Street, PH8-864, New York, NY 10032, USA.
| | | |
Collapse
|
53
|
Guañabens N, Parés A. Management of osteoporosis in liver disease. Clin Res Hepatol Gastroenterol 2011; 35:438-45. [PMID: 21546334 DOI: 10.1016/j.clinre.2011.03.007] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2011] [Accepted: 03/16/2011] [Indexed: 02/04/2023]
Abstract
Osteoporosis resulting in a high risk for fracture is a common complication in patients with liver disease, particularly in those with chronic cholestasis and with end-stage cirrhosis. The pathogenesis of bone loss in liver patients is poorly understood but it mainly results from low bone formation as a consequence of cholestasis or the harmful effects of alcohol or iron on osteoblasts. Increased bone resorption has also been described in cholestatic women with advanced disease. The management of bone disease in liver patients is addressed to reduce or avoid the risk factors for osteoporosis and fracture. Bisphosphonates associated with supplements of calcium and vitamin D are safe and effective for increasing bone mass in patients with chronic cholestasis and after liver transplantation, though no clear achievements in descreasing the incidence of fractures have been described, probably because of the low number of patients included in the therapeutic trials. Randomized studies assessing bisphosphonates in larger series of patients, the development of new drugs for osteoporosis and the improvement in the management of liver transplant recipients may change the future.
Collapse
Affiliation(s)
- Núria Guañabens
- Liver Unit, Department of Rheumatology, Hospital Clínic, CIBERhed, University of Barcelona, Barcelona, Spain
| | | |
Collapse
|
54
|
Wibaux C, Legroux-Gerot I, Dharancy S, Boleslawski E, Declerck N, Canva V, Mathurin P, Pruvot FR, Cortet B. Assessing bone status in patients awaiting liver transplantation. Joint Bone Spine 2011; 78:387-91. [PMID: 21565541 DOI: 10.1016/j.jbspin.2011.03.001] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/26/2010] [Indexed: 02/07/2023]
Abstract
UNLABELLED Osteoporosis is common in liver transplant recipients as a result of both iatrogenic factors and preexisting hepatic osteodystrophy. OBJECTIVES To assess the prevalences of osteoporosis and fractures and to identify risk factors for these two abnormalities in patients awaiting liver transplantation for end-stage liver disease. METHODS Between January 2006 and December 2007, patients on a liver transplant waiting list underwent a routine evaluation comprising the identification of risk factors for osteoporosis, radiographs of the spine, bone mineral density measurements (BMD), and laboratory tests (phosphate and calcium levels, hormone assays, liver function tests, and bone turnover markers). RESULTS We studied 99 patients (70 males and 20 females; mean age, 55 ± 8 years) including 75% with alcohol-induced cirrhosis with or without hepatocarcinoma. Among them, 36% had radiographic vertebral fractures, 38% had osteoporosis, 35% had osteopenia, and 88% had vitamin D insufficiency or deficiency (25(OH)vitamin D3<20 ng/mL). Lower BMD values were associated with vertebral fractures; the odds ratios and 95% confidence intervals for each BMD decrease of 1 SD were as follows: spine, 1.45 (95%CI, 1.1-1.9); total hip, 2.1 (95%CI, 1.3-3.2); and femoral neck, 2 (95%CI, 1.3-3.1) (P<0.05). Levels of bone resorption markers correlated negatively with BMD at the spine and hip. The Model for End-Stage Liver Disease score correlated negatively with hip BMD. CONCLUSION Our findings suggest high prevalences of low BMD values and vertebral fractures among patients awaiting liver transplantation. Bone status should be evaluated routinely in candidates to liver transplantation.
Collapse
Affiliation(s)
- Cécile Wibaux
- Service de rhumatologie, département universitaire de rhumatologie, université Nord de France, hôpital Roger-Salengro, CHRU de Lille, Lille, France.
| | | | | | | | | | | | | | | | | |
Collapse
|
55
|
Post-transplantation osteoporosis. ACTA ACUST UNITED AC 2011; 54:143-9. [PMID: 20485902 DOI: 10.1590/s0004-27302010000200009] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2009] [Accepted: 02/09/2010] [Indexed: 11/22/2022]
Abstract
Transplantation is an established therapy for many hematologic disorders as well as for end-stage diseases of the kidney, lung, liver, heart among others. Osteoporosis and a high incidence of fragility fractures have emerged as a complication of organ transplantation. Many factors contribute to the pathogenesis of osteoporosis following organ transplantation. In addition, most patients have some form of bone disease prior to transplantation, which is usually related to adverse effects of end-stage organ failure on the skeleton. This chapter reviews the mechanisms of bone loss that occur both in the early and late post-transplant periods including the contribution of immunosuppressive agents as well as the specific features of bone loss after kidney, lung, liver, cardiac and bone marrow transplantation. Prevention and treatment for osteoporosis in the transplant recipient will also be addressed.
Collapse
|
56
|
Abstract
Bone disease is a major complication of chronic liver disease. Osteomalacia is quite uncommon despite low vitamin D levels in the majority of patients with cirrhosis. In contrast, osteoporosis is quite common, occurring in up to 50% of patients. Osteoporosis can result in spontaneous or low-impact fractures in patients with chronic liver diseases, adversely affecting morbidity, quality of life, and survival. The general biology of osteoporosis, including its pathogenesis, diagnostic tools, and rationale for treatment, have been determined largely empirically from studies of postmenopausal women with osteoporosis. Treatment regimens with modification of risk factors, use of vitamin D, and supplementation with calcium and bisphosphonates have been shown to be effective in select groups of patients with chronic liver diseases.
Collapse
Affiliation(s)
- Bruce A Luxon
- Department of Medicine, Georgetown University, Washington, DC 20007, USA.
| |
Collapse
|
57
|
Short-term effects of zoledronate on the histomorphology of osteoclast in young albino rats. Ann Anat 2011; 193:509-15. [PMID: 21530208 DOI: 10.1016/j.aanat.2011.03.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2010] [Revised: 03/19/2011] [Accepted: 03/20/2011] [Indexed: 11/22/2022]
Abstract
The present study was conducted to histomorphometrically evaluate the effects of short-term administration of zoledronate, a third generation bisphosphonate, on the metaphysis of the proximal end of tibia in twenty day old male albino rats. Zoledronate (2.8 μg/kg body weight), was daily given subcutaneously for eleven days. The animals were sacrificed; tibiae were dissected out and decalcified in EDTA. Seven micron thick, serial longitudinal paraffin sections were stained with haematoxylin and eosin and examined under a Zeiss light microscope and Image Pro-Express Analyzer. In zoledronate treated rats, a significant increase (p<0.05) in the number of osteoclasts was observed both in the regions of primary spongiosa (zoledronate treated: 6.41 ± 0.30/mm(2), control: 2.90 ± 0.28/mm(2)) and secondary spongiosa (zoledronate treated: 49.58 ± 0.84/mm(2), control: 31.81 ± 2.02/mm(2)) along with a significant increase (p<0.05) in the length of the metaphyseal region as compared to the control group. The number of nuclei per osteoclast and area of the osteoclast also showed a significant increase (p<0.001; p<0.05 respectively) following the uptake of zoledronate. The findings in the present study, suggest that the osteoclasts are the primary sites of action of zoledronate resulting in decreased osteoclastic activity, which would account for the great increase in the number and size of inactive osteoclasts resulting in marked cancellous bone formation.
Collapse
|
58
|
Guadalix S, Martínez-Díaz-Guerra G, Lora D, Vargas C, Gómez-Juaristi M, Cobaleda B, González EM, Hawkins F. Effect of early risedronate treatment on bone mineral density and bone turnover markers after liver transplantation: a prospective single-center study. Transpl Int 2011; 24:657-65. [PMID: 21466595 DOI: 10.1111/j.1432-2277.2011.01253.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The aim of this study was to investigate the effect of risedronate (RIS) on bone loss and bone turnover markers after liver transplantation (LT). Patients with osteopenia or osteoporosis within the first month after LT were randomized to receive RIS 35 mg/week plus calcium 1000 mg/day and vitamin D(3) 800 IU/day (n = 45) or calcium and vitamin D(3) at same dosages (n = 44). Primary endpoint was change in bone mineral density (BMD) 6 and 12 months after LT. Secondary endpoints included changes in serum β-CrossLaps (β-CTX) and procollagen type 1 amino-terminal peptide (P1NP) and fracture rate. Spine X-rays were obtained at baseline and after 12 months. There was no significant difference in BMD changes between both treatment groups at any sites; either at 6 or 12 months. Spine BMD increased in both groups at 12 months vs. baseline (P = 0.001). RIS patients had a significant increase in intertrochanteric BMD at 12 months (P < 0.05 vs. baseline). Serum β-CTX decreased in both groups (P < 0.01), with significant differences between groups at 3 months. No significant difference in vertebral fracture incidence was found. After 12 months, BMD improved at lumbar spine and did not change at hip in both groups. Significant differences between both groups were not found. Other factors (calcium and vitamin D replacement, early prednisone withdrawal) seem to have also positive effects in BMD.
Collapse
Affiliation(s)
- Sonsoles Guadalix
- Hospital Universitario 12 de Octubre, Universidad Complutense, Madrid, Spain
| | | | | | | | | | | | | | | |
Collapse
|
59
|
Karabulut AB, Gül M, Karabulut E, Kiran TR, Ocak SG, Otlu O. Oxidant and antioxidant activity in rabbit livers treated with zoledronic acid. Transplant Proc 2011; 42:3820-2. [PMID: 21094863 DOI: 10.1016/j.transproceed.2010.06.017] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2010] [Revised: 05/21/2010] [Accepted: 06/18/2010] [Indexed: 12/20/2022]
Abstract
Zoledronic acid (ZA), a nitrogen-bearing bisphosphonate, is used to treat the hypercalcemia associated with cancer. In addition to its antiumor effects, it acts as an osteoclast inhibitor. To investigate the effects of ZA on oxidative stress and antioxidants, we studied reduced glutathione (GSH) and antioxidant gamma glutamate cysteine, including nitrite and nitrate, which are endproducts of nitric oxide (NO) as well as malondialdehyde (MDA) in rabbit liver tissue. In the study ZA (100 μg/kg) was administered to 7 rabbits that were fed ad libitum for comparison with untreated controls. MDA was studied using Thiobarbituric acid-reactive substance reduction, NO using cadmium reduction, GSH using an enzymatic method yielding dithinitrobenzene yellow substance. We observed significantly higher MDA and NO levels in the ZA group (P < .0001), whereas GSH levels were significantly lower (P < .0001). Tissues were examined histopathologically. According to our results we find ZA induced rabbit liver oxidative stress and decreases with antioxidant levels in liver tissue. Further studies are needed to explore the safe use of this agent.
Collapse
Affiliation(s)
- A B Karabulut
- Department of Clinical Biochemistry, Inonu University, Malatya, Turkey.
| | | | | | | | | | | |
Collapse
|
60
|
Sakhaee K. Osteoporosis following organ transplantation: pathogenesis, diagnosis and management. Expert Rev Endocrinol Metab 2011; 6:157-176. [PMID: 30290452 DOI: 10.1586/eem.10.86] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Organ transplantation has become popular for the management of various chronic illnesses. With the advent of modern immunosuppressive treatments, the longevity of transplant recipients has increased. Consequently, morbid complications such as osteoporosis and bone fractures are seen at an increasing frequency in this population. In most transplant recipients, bone mineral density (BMD) falls shortly after transplantation. However, bone fracture rate plateaus in all except for post-renal transplant patients. Although the underlying pathophysiologic mechanism for this difference is not fully understood, potential mechanisms for sustained bone loss in renal transplant recipients may be persistent phosphorus wasting and defective bone mineralization. Current treatment regimens are based on studies in a small numbers of subjects with BMD as the primary outcome. Although BMD is recognized as a gold standard in the assessment of bone fracture risk, to date, its association with bone fracture risk in the general post-transplant population is not robust. Therefore, randomized controlled trials with bone fracture as the primary end point are crucial. The development of noninvasive bone markers in distinguishing bone turnover and bone mineralization status is also pivotal since skeletal lesions are heterogeneous in various organ transplantations. The elucidation of these underlying skeletal lesions is necessary for the consideration of selective treatment in this population.
Collapse
Affiliation(s)
- Khashayar Sakhaee
- a UT Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390-8885, USA.
| |
Collapse
|
61
|
Hamdy RC. Zoledronic acid: clinical utility and patient considerations in osteoporosis and low bone mass. Drug Des Devel Ther 2010; 4:321-35. [PMID: 21151620 PMCID: PMC2998805 DOI: 10.2147/dddt.s6287] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
The availability of a once-a-year zoledronic acid infusion heralds a new era in the management of osteoporosis. It virtually eliminates the problem of poor compliance with orally administered bisphosphonates and, because it bypasses the gastrointestinal tract, it is not associated with gastrointestinal side effects. Zoledronic acid is effective for the treatment and prevention of postmenopausal osteoporosis, and for the treatment of osteoporosis in men, and glucocorticoid-induced osteoporosis. When administered within three months of a hip fracture, it reduces mortality and the risk of subsequent fractures. It is remarkably free of serious adverse effects. After administration of the intravenous infusion, about 18% of bisphosphonate-naïve patients experience an acute-phase reaction, including low-grade temperature, aches, and pains. This is reduced to about 9% in those who have been treated with oral bisphosphonates, and is further reduced by the concomitant and subsequent administration of acetaminophen. The likelihood and magnitude of the acute-phase reaction is less after the second infusion. Other adverse effects are similar to those encountered with other bisphosphonates. Because it is mostly excreted by the kidneys, zoledronic acid should not be administered to patients with a creatinine clearance less than 35 mL/min. It should not be administered to patients with hypocalcemia.
Collapse
Affiliation(s)
- Ronald C Hamdy
- Quillen Chair of Geriatrics and Gerontology, Quillen College of Medicine, East Tennessee State University, Box 70429, Johnson City, TN 37614, USA.
| |
Collapse
|
62
|
Resnick J, Gupta N, Wagner J, Costa G, Cruz RJ, Martin L, Koritsky DA, Perera S, Matarese L, Eid K, Schuster B, Roberts M, Greenspan S, Abu-Elmagd K. Skeletal integrity and visceral transplantation. Am J Transplant 2010; 10:2331-40. [PMID: 20825384 PMCID: PMC4869861 DOI: 10.1111/j.1600-6143.2010.03245.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Despite continuous improvement in long-term survival, there is no knowledge about risk of bone health impairment and management strategies before and after intestinal transplantation. Therefore, 147 adults were retrospectively studied via chart review; 70 long-term survivors, 53 candidates and 24 recipients with longitudinal follow-up. Evaluation process included measurement of bone mineral density (BMD) and allied biochemical markers. Both long-term survivors and candidates showed low bone mass with lower (p < 0.05) z-scores at hip, femoral neck and spine. Vitamin D deficiency and secondary hyperparathyroidism were observed in both groups. Prevalence of osteoporosis was 44% among long-term survivors and 36% in candidates with age, BMD, duration of parenteral nutrition, type of immunosuppression and rejection being significant risk factors. Fragility fractures occurred at a higher (p = 0.02) rate among long-term survivors (20%) compared to candidates (6%). The longitudinal study documented acceleration (p = 0.025) of bone loss after transplantation with a decline of 13.4% (femoral neck), 12.7% (hip) and 2.1% (spine). Alendronate reduced (p < 0.05) but did not prevent bone loss. In conclusion, intestinal transplant recipients are at risk of osteoporosis secondary to bone loss before and after transplantation. Accordingly, current management includes comprehensive preventive measures with prompt therapeutic intervention utilizing intravenous bisphosphonates or subcutaneous human PTH.
Collapse
Affiliation(s)
- J. Resnick
- Department of Medicine, University of Pittsburgh, Pittsburgh, PA
| | - N. Gupta
- Department of Medicine, University of Pittsburgh, Pittsburgh, PA
| | - J. Wagner
- Department of Medicine, University of Pittsburgh, Pittsburgh, PA
| | - G. Costa
- Department of Surgery, University of Pittsburgh, Pittsburgh, PA
| | - R. J. Cruz
- Department of Surgery, University of Pittsburgh, Pittsburgh, PA
| | - L. Martin
- Department of Surgery, University of Pittsburgh, Pittsburgh, PA
| | - D. A. Koritsky
- Department of Surgery, University of Pittsburgh, Pittsburgh, PA
| | - S. Perera
- Department of Medicine, University of Pittsburgh, Pittsburgh, PA,Department of Biostatistics, University of Pittsburgh, Pittsburgh, PA
| | - L. Matarese
- Department of Surgery, University of Pittsburgh, Pittsburgh, PA
| | - K. Eid
- Department of Surgery, University of Pittsburgh, Pittsburgh, PA
| | - B. Schuster
- Department of Surgery, University of Pittsburgh, Pittsburgh, PA
| | - M. Roberts
- Department of Medicine, University of Pittsburgh, Pittsburgh, PA
| | - S. Greenspan
- Department of Medicine, University of Pittsburgh, Pittsburgh, PA
| | - K. Abu-Elmagd
- Department of Surgery, University of Pittsburgh, Pittsburgh, PA, Corresponding author: Kareem M. Abu-Elmagd,
| |
Collapse
|
63
|
Dalle Carbonare L, Zanatta M, Gasparetto A, Valenti MT. Safety and tolerability of zoledronic acid and other bisphosphonates in osteoporosis management. Drug Healthc Patient Saf 2010; 2:121-37. [PMID: 21701624 PMCID: PMC3108695 DOI: 10.2147/dhps.s6285] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2010] [Indexed: 12/18/2022] Open
Abstract
Bisphosphonates (BPs) are widely used in the treatment of postmenopausal osteoporosis and other metabolic bone diseases. They bind strongly to bone matrix and reduce bone loss through inhibition of osteoclast activity. They are classified as nitrogen- and non-nitrogen-containing bisphosphonates (NBPs and NNBPs, respectively). The former inhibit farnesyl diphosphate synthase while the latter induce the production of toxic analogs of adenosine triphosphate. These mechanisms of action are associated with different antifracture efficacy, and NBPs show the most powerful action. Moreover, recent evidence indicates that NBPs can also stimulate osteoblast activity and differentiation. Several randomized control trials have demonstrated that NBPs significantly improve bone mineral density, suppress bone turnover, and reduce the incidence of both vertebral and nonvertebral fragility fractures. Although they are generally considered safe, some side effects are reported (esophagitis, acute phase reaction, hypocalcemia, uveitis), and compliance with therapy is often inadequate. In particular, gastrointestinal discomfort is frequent with the older daily oral administrations and is responsible for a high proportion of discontinuation. The most recent weekly and monthly formulations, and in particular the yearly infusion of zoledronate, significantly improve persistence with treatment, and optimize clinical, densitometric, and antifracture outcomes.
Collapse
Affiliation(s)
- Luca Dalle Carbonare
- Clinic of Internal Medicine D, Department of Medicine, University of Verona, Italy
| | | | | | | |
Collapse
|
64
|
Matsubara M, Yamachika E, Tsujigiwa H, Mizukawa N, Ueno T, Murakami J, Ishida N, Kaneda Y, Shirasu N, Takagi S. Suppressive effects of 1,4-dihydroxy-2-naphthoic acid administration on bone resorption. Osteoporos Int 2010; 21:1437-47. [PMID: 19813044 DOI: 10.1007/s00198-009-1075-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/08/2008] [Accepted: 08/26/2009] [Indexed: 12/16/2022]
Abstract
SUMMARY The main component of the metabolic by-products of fermentation by Propionibacterium freudenreichii ET-3 is 1,4-dihydroxy-2-naphthoic acid (DHNA), which has a naphthoquinone skeleton, as in vitamin K2. This study showed that DHNA improved bone mass reduction with osteoporosis model mice caused by FK506. INTRODUCTION Growth of the intestinal bacterium Lactobacillus bifidus is specifically facilitated by DHNA. The present study used osteoporosis model mice to investigate the effects of DHNA on bone remodeling. METHODS FK506, an immunosuppressant, was used to prepare osteoporosis model mice. Thirty mice were divided into three groups: FK group, FK+DHNA group, and control group. In the FK group, FK506 was administered to induce bone mass reduction. In the FK-DHNA group, FK506 and DHNA were administered concurrently to observe improvements in bone mass reduction. To ascertain systemic and local effects of DHNA, we investigated systemic pathological changes in colon, kidney function and cytokine dynamics, and morphological and organic changes in bone and osteoclast dynamics as assessed by culture experiments. RESULTS Compared to the FK group without DHNA, colon damage and kidney dysfunction were milder for FK+DHNA group, and production of inflammatory cytokines (interleukin (IL)-1beta, IL-6 and tumor necrosis factor (TNF)-alpha) was more suppressed. Furthermore, compared to the group without DHNA, histological analyses and radiography showed that bone resorption was suppressed for the DHNA group. Culture experiments using osteoclasts from murine bone marrow showed osteoclast suppression for the DHNA group compared to the group without DHNA. CONCLUSION These results show that DHNA has some effects for improving bone mass reduction caused by FK506.
Collapse
Affiliation(s)
- M Matsubara
- Department of Oral and Maxillofacial Reconstructive Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1 Sikata-cho, Okayama City, 7008525, Japan.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
65
|
Guañabens N, Parés A. Liver and bone. Arch Biochem Biophys 2010; 503:84-94. [PMID: 20537977 DOI: 10.1016/j.abb.2010.05.030] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2010] [Revised: 05/24/2010] [Accepted: 05/26/2010] [Indexed: 02/06/2023]
Abstract
Osteoporosis is a frequent complication in patients with chronic liver disease, especially in end-stages and in cases with chronic cholestasis, hemochromatosis and alcohol abuse. The problem is more critical in transplant patients when bone loss is accelerated during the period immediately after transplantation, leading to a greater incidence of fractures. Advanced age, low body mass index and severity of the liver disease are the main risk factors for bone disease in patients with cholestasis. Mechanisms underlying osteoporosis in chronic liver disease are complex and poorly understood, but osteoporosis mainly results from low bone formation, related to the effects of retained substances of cholestasis, such as bilirubin and bile acids, or to the effects of alcohol on osteoblastic cells. Increased bone resorption has also been described in cholestatic women with advanced disease. Although there is no specific treatment, bisphosphonates associated with supplements of calcium and vitamin D are effective for increasing bone mass in patients with chronic cholestasis and after liver transplantation. The outcome in reducing the incidence of fractures has not been adequately demonstrated essentially because of the low number of patients included in the therapeutic trials. Randomized studies assessing bisphosphonates in larger series of patients, the development of new drugs for osteoporosis and the improvement in the management of liver transplant recipients may change the future.
Collapse
Affiliation(s)
- Núria Guañabens
- Department of Rheumatology, University of Barcelona, Barcelona, Spain.
| | | |
Collapse
|
66
|
Abstract
Secondary osteoporosis is characterized by low bone mass with microarchitectural alterations in bone leading to fragility fractures in the presence of an underlying disease or medication. Scenarios that are highly suspicious for secondary osteoporosis include fragility fractures in younger men or premenopausal women, very low bone mineral density (BMD) values, and fractures despite anti-osteoporotic therapy. An open-minded approach with a detailed history and physical examination combined with first-line laboratory tests are aimed at identifying clinical risk factors for fractures, osteoporosis-inducing drugs, and underlying endocrine, gastrointestinal, hematologic, or rheumatic diseases, which then need to be confirmed by specific and/or more invasive tests. BMD should be assessed with bone densitometry at the hip and spine. Lateral X-rays of the thoracic and lumbar spine should be performed to identify or exclude prevalent vertebral fractures which may be clinically silent. Management of secondary osteoporosis includes treatment of the underlying disease, modification of medications known to affect the skeleton, and specific anti-osteoporotic therapy. Calcium and vitamin D supplementation should be initiated with doses that result in normocalcemia and serum 25-hydroxyvitamin D concentrations of at least 30 ng/ml. Oral and i.v. bisphosphonates are effective and safe drugs for most forms of secondary osteoporosis. Severe osteoporosis may require the use of teriparatide.
Collapse
Affiliation(s)
- Lorenz C Hofbauer
- Division of Endocrinology, Diabetes, and Bone Diseases, Department of Medicine III and Center of Regenerative Therapies Dresden (CRTD), Technical University Medical Center, Fetscherstrasse 74, Dresden, Germany.
| | | | | |
Collapse
|
67
|
|
68
|
Frith J, Newton JL. Liver disease in older women. Maturitas 2010; 65:210-4. [DOI: 10.1016/j.maturitas.2009.11.010] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2009] [Accepted: 11/04/2009] [Indexed: 01/10/2023]
|
69
|
Kaemmerer D, Lehmann G, Wolf G, Settmacher U, Hommann M. Treatment of osteoporosis after liver transplantation with ibandronate. Transpl Int 2010; 23:753-9. [PMID: 20158691 DOI: 10.1111/j.1432-2277.2010.01061.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Osteoporosis is a major side-effect after liver transplantation (LTX). Therefore, the objective of the study was to evaluate the efficacy of ibandronate to reduce fractures after LTX. Seventy-four patients after LTX were included in the study and measurements of bone mineral density (BMD) of lumbar spine and proximal femur using dual energy X-ray absorptiometry (DEXA) were performed prior to and 3, 6, 12 and 24 months after surgery. The study group (IBA) consisted of 34 patients who received calcium (1 g/day), vitamin D3 (800-1000 IE/day) and ibandronate 2 mg every 3 months intravenously for 1 year. The control group consisted of 40 patients (CON) who received calcium and vitamin D3 at the same dosages. Prevalence of new fractures was predefined as primary endpoint. Changes of BMD and biochemical markers of bone metabolism were also investigated. In all patients, we found a reduction of BMD in the first few months after LTX. In the lumbar spine and the proximal femur the maximum reduction occurred 3 and 6 months post-LTX. One and 2 years after transplantation, the group receiving ibandronate demonstrated a better recovery from loss of BMD and a significantly lower prevalence of fractures (IBA 2 vs. CON 10 P < 0.04, chi(2)). Ibandronate with calcium and vitamin D3 reduces the BMD-loss after LTX and decreases the rate of bone fractures significantly.
Collapse
Affiliation(s)
- Daniel Kaemmerer
- Department of General and Visceral Surgery, Zentralklinik GmbH Bad Berka, Bad Berka, Germany.
| | | | | | | | | |
Collapse
|
70
|
Bodingbauer M, Pakrah B, Kristo I, Marschalek J, Burghuber C, Györi G, Kainz A, Rasoul-Rockenschaub S, Klaushofer K, Muehlbacher F, Oberbauer R. Non-persistent effect of short-term bisphosphonate treatment in preventing fractures after liver transplantation. Transpl Int 2010; 23:118-20. [DOI: 10.1111/j.1432-2277.2009.00918.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
71
|
Kasturi KS, Chennareddygari S, Mummadi RR. Effect of bisphosphonates on bone mineral density in liver transplant patients: a meta-analysis and systematic review of randomized controlled trials. Transpl Int 2009; 23:200-7. [PMID: 19793074 DOI: 10.1111/j.1432-2277.2009.00976.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
SUMMARY Bone mineral density (BMD) loss after liver transplantation (LT) results in considerable morbidity with the increased risk of fractures. Data on the efficacy of bisphosphonate use in post LT patients is scarce. This meta-analysis aims to summarize the results from published randomized controlled trials (RCTs) on the topic of interest. Electronic databases were searched to identify relevant publications. A total of 157 articles were identified and reviewed. Individual authors were contacted from relevant RCTs to obtain individual patient data where necessary to uniformly quantify BMD values post LT pre- and post LT. A total of six RCTs were used for final data extraction. (i) Lumbar Spine: In 364 patients (six studies, 182 in intervention and control groups each), bisphosphonate therapy improved BMD by 0.03 g/cm(2) (95% C.I. 0.01-0.05 g/cm(2); P = 0.02) at 12 months post LT. (ii) Femoral neck: In 268 patients (four studies, 130 bisphosphonate, 138 control), bisphosphonate use did not result in a statistically significant change in BMD at the end of 1 year. None of the studies noted serious adverse effects related to bisphosphonate administration. Data on incident fractures could not be pooled because of heterogeneity. Bisphosphonate therapy during the first year in LT recipients appears to reduce accelerated bone loss and improve bone mineral density at the lumbar spine.
Collapse
Affiliation(s)
- Krishna S Kasturi
- Division of Gastroenterology and Hepatology, University of Texas Medical Branch, Galveston, TX 77555, USA.
| | | | | |
Collapse
|
72
|
Zoledronic acid in the treatment of bone metastases by hepatocellular carcinoma: a case series. Cancer Chemother Pharmacol 2009; 65:1137-43. [PMID: 19760218 DOI: 10.1007/s00280-009-1122-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2009] [Accepted: 09/02/2009] [Indexed: 12/14/2022]
Abstract
PURPOSE The survival of patients with hepatocellular carcinoma (HCC) has improved with advancements in various diagnostic tools and treatment modalities. Consequently, bone metastases from HCC are diagnosed more frequently. The aims of the present study was to describe the clinical features and treatment of HCC patients presenting with bone metastases. In particular, we evaluated the role of zoledronic acid in these patients especially with regard to pain reduction, analgesic drug consumption and safety. METHODS Between December 2006 and July 2008, we recruited 17 (male:female, 12:5, median age, 68 years; age range, 62-85 years) consecutive patients. Spinal metastases were present in 11 patients (64.7%). Zoledronic acid was administered in all patients (total number of administrations, 107; mean number of administrations, 6.29). RESULTS A total of 15 patients received at least three administrations of zoledronic acid and reported clinical benefit with pain reduction and tapering of analgesic drugs. Before starting treatment, the mean VAS for patients who received at least three administrations (15/17 patients) of zoledronic acid was 7.1 (+/-0.24), and after 3 months 5.3 (+/-0.20). This improvement was independent of the sex, the extent of metastasis and the concomitant anticancer treatment. No significant side effects were registered in this series of patients. Median survival was 10 months (CI 6,353-13,647). CONCLUSIONS Zoledronic acid may be helpful in treating bone metastases in HCC patients. Patients regularly receiving zoledronic acid showed significant pain relief.
Collapse
|
73
|
Doggrell SA. Clinical efficacy and safety of zoledronic acid in osteoporosis and Paget's bone disease. Expert Rev Endocrinol Metab 2009; 4:405-415. [PMID: 30736183 DOI: 10.1586/eem.09.23] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Osteoporosis and Paget's bone disease are the most common diseases of the bone. In addition to glucocorticoid treatment, there are many other secondary causes of osteoporosis. Bisphosphonates are used to treat these bone conditions. Zoledronic acid is the most potent bisphosphonate at inhibiting bone resorption. In osteoporosis, zoledronic acid increases bone mineral density for at least 1 year following a single intravenous administration. The efficacy and safety of zoledronic acid in the treatment of osteoporosis and Paget's bone disease are reviewed. This article also covers the studies of the effects of zoledronic acid in the bone loss associated with the secondary osteoporosis.
Collapse
Affiliation(s)
- Sheila A Doggrell
- a School of Life Sciences, Queensland University of Technology, GPO Box 2334, Brisbane, QLD 4001, Australia.
| |
Collapse
|
74
|
Lv Y, Yuan S, Chen J, Yi J, Yao Q, Ling R, Wang T, Li N, Zhang J, Wang H, Wang L. Zoledronic acid may be a treatment option for hyperparathyroidism. Med Hypotheses 2009; 73:458. [DOI: 10.1016/j.mehy.2009.04.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2009] [Revised: 04/03/2009] [Accepted: 04/08/2009] [Indexed: 11/26/2022]
|
75
|
Gasser RW. Cholestasis and metabolic bone disease - a clinical review. Wien Med Wochenschr 2009; 158:553-7. [PMID: 18998071 DOI: 10.1007/s10354-008-0594-z] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2008] [Accepted: 04/01/2008] [Indexed: 11/29/2022]
Abstract
Metabolic bone disease, mainly osteopenia/osteoporosis and occasionally osteomalacia, is a major extrahepatic manifestation of chronic cholestatic liver disease (synonym: hepatic osteodystrophy). Reduced bone mineral density is found in up to 60% and atraumatic fractures in about 20% of patients with chronic liver disease. Hepatic osteodystrophy is characterized by reduced formation and increased resorption of bone; major risk factors are chronic cholestasis and advanced cirrhosis. Pathogenetic mechanisms include genetic factors, abnormalities of calcium, vitamin D, vitamin K and bilirubin metabolism, IGF-1 deficiency, the RANKL/OPG-system, hypogonadism, drugs harmful to bone, lifestyle factors (smoking, alcoholism, immobility), malnutrition and low body mass index. Screening for osteopenia should be performed and reversible risk factors must be corrected. At present, bisphosphonates are the predominantly used specific drugs for the treatment of osteoporosis in chronic liver disease. After orthotopic liver transplantation bone mineral density improves in long-term follow-up. Studies are needed for fracture prevention in chronic liver disease.
Collapse
Affiliation(s)
- Rudolf W Gasser
- Division of General Internal Medicine, Department of Internal Medicine, Medical University of Innsbruck, Innsbruck, Austria.
| |
Collapse
|
76
|
Abstract
Transplantation is an established therapy for end-stage diseases of the kidney, endocrine pancreas, heart, liver, lung, intestines and for many hematological disorders. Current immunosuppressive regimens with glucocorticoids and calcineurin inhibitors produce excellent patient and graft survival rates. This has resulted in both increases in transplant numbers and an increased recognition of previously neglected long-term complications of transplantation such as fractures and osteoporosis. Both pretransplantation bone disease and immunosuppressive therapy result in rapid bone loss and increased fracture rates. Patients are particularly at risk early after transplantation. The bone health of candidates for organ transplantation should be assessed with bone densitometry of the hip and spine. Spinal x-rays should be performed to diagnose prevalent fractures. Any secondary causes of osteoporosis should be identified and treated. Vitamin D deficiency should be corrected with vitamin D doses selected to achieve a serum 25-hydroxyvitamin D concentration of at least 20 ng/ml. All patients should receive calcium. Patients with kidney failure should be evaluated and treated for chronic kidney disease-mineral and bone disorder, including renal osteodystrophy. Secondary hyperparathyroidism, in particular, should be treated. Treatment is indicated in the immediate posttransplantation period irrespective of bone mineral density because further rapid bone loss will occur in the first several months after transplantation. Long-term organ transplant recipients should also have bone mass measurement and treatment of osteoporosis. Oral and iv bisphosphonates are the most promising approach for the management of transplantation osteoporosis. Active vitamin D metabolites may have additional benefits in reducing hyperparathyroidism, particularly after kidney transplantation.
Collapse
Affiliation(s)
- Peter R Ebeling
- Department of Medicine (Royal Melbourne Hospital/Western Hospital) and Endocrinology, The University of Melbourne, Western Hospital, Gordon Street, Footscray 3011, Victoria, Australia.
| |
Collapse
|
77
|
Stein EM, Cohen A, Freeby M, Rogers H, Kokolus S, Scott V, Mancini D, Restaino S, Brown R, McMahon DJ, Shane E. Severe vitamin D deficiency among heart and liver transplant recipients. Clin Transplant 2009; 23:861-5. [PMID: 19453643 DOI: 10.1111/j.1399-0012.2009.00989.x] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
INTRODUCTION Although patients with end-stage organ failure are at high risk for vitamin D deficiency because of limited sunlight exposure and hepatic dysfunction, few studies have measured 25-hydroxy vitamin D (25OHD) at the time of transplantation. METHODS We measured serum 25OHD immediately after transplantation in 69 heart and liver transplant recipients. RESULTS Forty-six heart and 23 liver transplant recipients were evaluated (mean age 53 yr). Mean 25OHD was well below the lower limit of the normal range (43.2 +/- 21.2 nmol/L). Ninety-one percent had levels below 75 nmol/L, the threshold commonly used to denote sufficiency, and 71% had levels below 50 nmol/L. Severe deficiency (25OHD <25 nmol/L) was found in 16%. Vitamin D levels did not differ by race, age, gender, or season. Mean 25OHD was lower among liver than heart transplant recipients (34.4 +/- 17.5 vs. 47.7 +/- 20.7 nmol/L; p < 0.03). Among liver transplant recipients, 22% had undetectable levels (<17 nmol/L). CONCLUSIONS Vitamin D deficiency is highly prevalent among heart and liver transplant recipients; those with liver failure are at greatest risk. As vitamin D deficiency has many serious skeletal and extra-skeletal sequelae, physicians who treat transplant patients should maintain a high degree of vigilance for this problem.
Collapse
Affiliation(s)
- Emily M Stein
- Department of Medicine, College of Physicians and Surgeons, Columbia University, New York, NY 10032, USA
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
78
|
Orthotopic liver transplantation and what to do during follow-up: recommendations for the practitioner. ACTA ACUST UNITED AC 2008; 6:23-36. [PMID: 19029996 DOI: 10.1038/ncpgasthep1312] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2008] [Accepted: 10/01/2008] [Indexed: 12/18/2022]
Abstract
Improvements in surgical technique and the introduction of several new immunosuppressive medications mean that outcome after orthotopic liver transplantation (OLT) has improved continuously over the past 15 years. Given the increasing longevity of patients after OLT, the recognition and prevention of long-term complications after transplantation have become ever more important. With respect to graft function, physicians responsible for the everyday care of patients following transplantation should be particularly aware of the risk of late and chronic rejection episodes and of recurrence of the underlying liver disease. The major challenge of post-transplant care is, however, how best to prevent and manage the long-term adverse effects caused by the immunosuppressive medications prescribed. Screening investigations for early diagnosis of malignancy, strict control of cardiovascular risk factors, preservation of renal function, and prevention of infections are, therefore, fundamental. This Review suggests guidelines for the management of OLT recipients to improve long-term survival, overall outcome and health-related quality of life.
Collapse
|
79
|
Monegal A, Guañabens N, Suárez MJ, Suárez F, Clemente G, García-González M, De la Mata M, Serrano T, Casafont F, Tome S, Torne S, Barrios C, Navasa M. Pamidronate in the prevention of bone loss after liver transplantation: a randomized controlled trial. Transpl Int 2008; 22:198-206. [PMID: 18796000 DOI: 10.1111/j.1432-2277.2008.00763.x] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Rapid bone loss and high rates of fractures occur following liver transplantation. To analyze the effect of intravenous pamidronate on bone loss after liver transplantation. A randomized, double-blind, placebo-controlled study was performed. Seventy-nine patients were randomized to two groups of treatment: the pamidronate group (n = 38) was treated with 90 mg/IV of pamidronate within the first 2 weeks and at 3 months after transplantation; the placebo group (n = 41) received glucose infusions at the same time points. All patients received calcium and vitamin D. Bone mineral density (BMD) at the lumbar spine (L(2)-L(4)) and proximal femur using dual energy X-ray absorptiometry and also spinal X-rays were performed before, and at 6 and 12 months after liver transplantation. Biochemical and hormonal determinations were performed previous to transplantation, at 24 h before and after treatment, as well as at 6 and 12 months after liver transplantation. At 12 months after transplantation, there were significant differences in lumbar BMD changes (6 months: pamidronate 1.6% vs. placebo 0.8%, P = NS; 12 months: pamidronate 2.9% vs. placebo 1%, P < 0.05). Femoral neck BMD decreased in the pamidronate- and placebo groups during the first 6 months (6 months: pamidronate -3.1% vs. placebo -2.9%, P = NS; 12 months: pamidronate -3.2% vs. placebo -3.1%, P = NS). BMD at the trochanter remained stable in the pamidronate group, whilst a reduction was observed in the placebo group at 6 months (6 months: pamidronate -0.7% vs. placebo -3.7%, P < 0.05; 12 months: pamidronate -0.5% vs. placebo -1.2%, P = NS). Moreover, no significant differences in the incidence of fractures, serum parathyroid hormone and serum 25-hydroxyvitamin D values between both groups were found. Pamidronate did not increase the risk of serious adverse events. The results of this study show that 90 mg of intravenous pamidronate within the first 2 weeks and at 3 months following liver transplantation preserve lumbar bone mass during the first year, without significant adverse events. However, pamidronate does not reduce bone loss at the femoral neck and furthermore it does not reduce skeletal fractures.
Collapse
Affiliation(s)
- Ana Monegal
- Department of Rheumatology, Hospital Clínic i Provincial, Barcelona, Spain.
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
80
|
Misof BM, Bodingbauer M, Roschger P, Wekerle T, Pakrah B, Haas M, Kainz A, Oberbauer R, Mühlbacher F, Klaushofer K. Short-term effects of high-dose zoledronic acid treatment on bone mineralization density distribution after orthotopic liver transplantation. Calcif Tissue Int 2008; 83:167-75. [PMID: 18712431 DOI: 10.1007/s00223-008-9161-2] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/22/2008] [Accepted: 07/02/2008] [Indexed: 10/21/2022]
Abstract
Patients with "hepatic" bone disease exhibit increased fracture incidence. The effects on bone material properties, their changes due to orthotopic liver transplantation (OLT), as well as zolendronate (ZOL) treatment have not yet been investigated. We studied bone mineralization density distribution (BMDD) in paired transiliacal biopsies (at and 6 months after OLT) from patients (control CON n = 18, treatment group ZOL n = 21, the latter treated with i.v. ZOL at doses of 4 mg/month) for how bone at the material level was affected by the "hepatic" disease in general, as well as by OLT and ZOL in particular. (1) BMDD parameters at baseline reflected disturbed bone matrix mineralization in "hepatic" bone disease combined with low turnover. Trabecular bone displayed a decrease in mean and most frequent calcium concentration (Ca(MEAN) -2.9% and Ca(PEAK) -2.8%, respectively; both P < 0.001), increased heterogeneity of mineralization (Ca(WIDTH) +12.2%, P = 0.01), and increased percentage of bone areas with low mineralization (Ca(LOW) +32.4%, P = 0.02) compared to normal; however, there were no differences compared to cortical bone. (2) Six months after OLT, ZOL-treated trabecular bone displayed reduced Ca(LOW) (-32.0%, P = 0.047), cortical bone increased Ca(MEAN) (+4.2%, P = 0.009), increased Ca(PEAK) (+3.3%, P = 0.040), and decreased Ca(LOW) (-55.7, P = 0.038) compared to CON and increased Ca(MEAN) compared to baseline (+1.9, P = 0.032) without any signs of hyper- or defective mineralization. These changes as consequence of the antiresorptive action of ZOL visible already after 6 months result in beneficial effects on bone matrix mineralization, likely contributing to the significant decrease in fracture incidence observed in these patients 2 years post transplantation.
Collapse
Affiliation(s)
- B M Misof
- Ludwig Boltzmann Institute of Osteology at Hanusch Hospital of WGKK and AUVA Trauma Center Meidling, 4th Medical Department at Hanusch Hospital, UKH Meidling, Kundratstr. 37, 1120 Vienna, Austria.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
81
|
Evaluation and management of bone disease and fractures post transplant. Transplant Rev (Orlando) 2008; 22:52-61. [PMID: 18631858 DOI: 10.1016/j.trre.2007.09.001] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Bone disease is common in recipients of kidney, liver, heart, and lung transplants and results in fractures in 20-40% of patients, a rate much higher than expected for age. Fractures occur because of the presence of bone disease as well as other factors such as neuropathy, poor balance, inactivity, and low body or muscle mass. Major contributors to bone disease include both preexisting bone disease and bone loss post transplant, which is greatest in the first 6-12 months when steroid doses are highest. Bone disease in kidney transplant recipients should be considered different from that which occurs in other solid organ transplant recipients for several reasons including the presence of renal osteodystrophy, which contributes to low bone mineral density in these patients; the location of fractures (more common in the legs and feet in these patients than in spine and hips as in other solid organ recipients); and the potential danger in using bisphosphonate therapy, which may cause more harm than good in kidney transplant recipients with low bone turnover. Evaluation in all patients should preferably occur in the pretransplant period or early post transplant and should include assessment of fracture risk as well as metabolic factors that can contribute to bone disease. Bone mineral density measurement is recommended in all patients even if its predictive value for fracture risk in the transplant population is unproven. Management of bone disease should be directed toward decreasing fracture risk as well as improving bone density. Pharmacologic and nonpharmacologic treatment strategies are discussed in this review. Although there have been many studies describing a beneficial effect of bisphosphonates and vitamin D analogues on bone density, none have been powered to detect a decrease in fracture rate.
Collapse
|
82
|
Abstract
Osteoporosis, characterized by loss of bone strength leading to fragility fractures, is a common event in patients who have primary biliary cirrhosis. Although its pathogenesis is not well known, it results mainly from low bone formation. There is no specific treatment, but bisphosphonates, especially alendronate, effectively increases bone mass and prevents bone loss. Despite these favorable effects on bone mass, no clear effects on decreasing the fracture rate are demonstrated, probably because of the low number of patients included in the trials. The potential usefulness of new agents requires further evaluation.
Collapse
|
83
|
Hay JE. How effective is bisphosphonate treatment for preventing bone fractures after liver transplantation? ACTA ACUST UNITED AC 2008; 5:190-1. [DOI: 10.1038/ncpgasthep1065] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2007] [Accepted: 11/19/2007] [Indexed: 11/09/2022]
|
84
|
Abstract
PURPOSE OF REVIEW To present an overview of the peer-reviewed literature relating to glucocorticoid-induced osteoporosis that has been published since January 2006. RECENT FINDINGS Understanding the pathophysiology of bone loss resulting from glucocorticoid use has become clearer. The role of the receptor-activated nuclear factor kappaB-ligand-osteoprotogerin system has been clarified and will likely lead to better targeted therapies. Minimal trauma fractures occur in patients treated with glucocorticoids at higher bone mineral density than is seen with other primary or secondary causes of osteoporosis. Uncertainty still remains about the lowest dose of glucocorticoids that is not associated with bone loss. Bisphosphonates remain the treatment of choice for glucocorticoid-induced osteoporosis, but despite this effective therapy the disease remains under recognized and undertreated. SUMMARY Glucocorticoid-induced osteoporosis is a leading cause of secondary osteoporosis, one of the more devastating consequences of glucocorticoid therapy. Bone mineral density underestimates the risk of fragility fractures in glucocorticoid-induced osteoporosis, which may account for the underrecognition and undertreatment of the disease prior to fracture.
Collapse
Affiliation(s)
- Karen Koenig Berris
- Department of Internal Medicine, Wayne State University, Detroit, Michigan, USA
| | | | | |
Collapse
|
85
|
Abstract
Osteoporosis is prevalent in transplant recipients and is related to pre- and post-transplantation factors. Low bone density and fractures may antedate transplantation, related to traditional risk factors for osteoporosis, effects of chronic illness, and end-stage organ failure and its therapy, on the skeleton. Bone loss after transplantation is related to adverse effects of immunosuppressive drugs (glucocorticoids and calcineurin inhibitors) on bone remodeling. Newer immunosuppressive medications may permit lower doses of glucocorticoids and may be associated with decreased bone loss and fractures. Bisphosphonates are currently the most effective agents for the prevention and treatment of post-transplantation osteoporosis.
Collapse
Affiliation(s)
- Emily Stein
- Division of Endocrinology, Department of Medicine, College of Physicians & Surgeons, Columbia University, 630 West 168th Street, PH8-864, New York, NY 10032, USA
| | | | | |
Collapse
|
86
|
Matsunaga T, Shigetomi M, Hashimoto T, Suzuki H, Gondo T, Tanaka H, Sugiyama T, Taguchi T. Effects of bisphosphonate treatment on bone repair under immunosuppression using cyclosporine A in adult rats. Osteoporos Int 2007; 18:1531-40. [PMID: 17492246 DOI: 10.1007/s00198-007-0387-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/22/2006] [Accepted: 04/17/2007] [Indexed: 11/29/2022]
Abstract
UNLABELLED The effect of cyclosporine A on bone turnover remains unclear. Using adult rats with vascularized bone transplantation, we show that long-term cyclosporine A administration increases bone turnover and zoledronic acid treatment enhances the reconstruction of cyclosporine A-administered skeleton. Bisphosphonates might be efficacious in human bone repair under immunosuppression using cyclosporine A. INTRODUCTION Bisphosphonate treatment effectively prevents bone loss after transplantation. However, recent evidence from gain- and loss-of-function experiments has indicated that calcineurin inhibitors, such as cyclosporine A (CsA), reduce bone turnover, and severely suppressed bone turnover might delay the union of human fractured bone. The purpose of this study was to investigate the effects of bisphosphonate treatment on the repair of CsA-administered skeleton. METHODS After skeletal reconstruction by vascularized tibial grafting, adult recipient rats were treated with intramuscular CsA (10 mg/kg/day) and low-dose (0.2 microg/kg/week) or high-dose (2 microg/kg/week) subcutaneous zoledronic acid alone or in combination for 8 weeks. Biochemical parameters were measured in blood and urine. The reconstructed skeleton was analyzed using soft X-ray, histology, dual energy X-ray absorptiometry, and three-point bending test. RESULTS CsA induced mild renal dysfunction, hyperparathyroidism and high bone turnover. High-dose zoledronic acid delayed cortical bone union at the distal host-graft junction, but its combination with CsA did not cause such a delay. High-dose zoledronic acid prevented CsA-induced bone loss and bone fragility in the reconstructed skeleton. CONCLUSION In this rat model, long-term CsA administration increases bone turnover, at least partly, through hyperparathyroidism and high-dose zoledronic acid treatment does not impair the union of CsA-administered bone.
Collapse
Affiliation(s)
- T Matsunaga
- Department of Orthopaedic Surgery, Yamaguchi University School of Medicine, 1-1-1 Minamikogushi, Yamaguchi 755-8505, Japan
| | | | | | | | | | | | | | | |
Collapse
|
87
|
Labio ED, Del Rosario DB, Strasser SI, McCaughan GW, Crawford BA. Effect of ascites on bone density measurement in cirrhosis. J Clin Densitom 2007; 10:391-4. [PMID: 17703977 DOI: 10.1016/j.jocd.2007.07.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/12/2007] [Revised: 06/14/2007] [Accepted: 07/02/2007] [Indexed: 12/28/2022]
Abstract
Cirrhosis is an independent risk factor for the development of osteoporosis. The presence of ascites in patients with cirrhosis may affect the accuracy of bone density measurement in the spine. Twenty cirrhotic patients had bone mineral density (BMD) measurements of the lumbar spine, femoral neck, hip, and total body using dual-energy X-ray absorptiometry (DXA; Lunar Prodigy) before and after large-volume paracentesis. To establish short-term precision of DXA measurement, 28 healthy adults also had duplicate BMD measurements on the same day. After paracentesis (6.4+/-2.0 L), there was a significant increase in the spine BMD of 4.2% (p=0.003) and in the total hip BMD of 1.3% (p=0.002), but there was no change in the femoral neck or total body. No significant differences (p>0.1) were seen in duplicate BMD measurements at any site among the healthy cohort. Within-patient changes in spine (p=0.001) and total hip (p=0.001) BMD measurements were significantly greater in patients with ascites than in the healthy cohort. These changes in BMD measurements were not associated with age, gender, amount of fluid removed, or time interval between measurements. These results suggest that ascites cause a fluid artifact in the soft tissue and bone interface that can falsely lower BMD measurements, particularly in the spine.
Collapse
Affiliation(s)
- Eternity D Labio
- NHMRC Center of Clinical Research Excellence to Improve Outcome in Chronic Liver Disease, AW Morrow Gastroenterology and Liver Center, University of Sydney, Camperdown, New South Wales, Australia
| | | | | | | | | |
Collapse
|
88
|
Abstract
Osteomalacia rarely occurs in adult patients with chronic liver disease despite a low serum vitamin D level being reported in up to two-thirds of patients with cirrhosis. In contrast, osteoporosis, which increases the risk of vertebral fractures, occurs in 12%-55% of patients with cirrhosis. Although the prevalence is probably falling, as shown by a fall from 57%-26% in patients with biliary disease requiring liver transplantation over the last 2 decades, it still accounts for significant patient morbidity. Bone density also falls in the first 3 months after liver transplantation, and pretransplant fractures are predictive of posttransplant fractures. Many of the known risk factors for postmenopausal osteoporosis exist in the cirrhotic population, such as excess alcohol intake, steroid use, poor nutrition, and hypogonadism. There is also an increased risk of osteoporosis in patients without cirrhosis, particularly those with hemochromatosis and biliary disease. The diagnosis is made with bone density measurements. The effective treatment is largely based on evidence from postmenopausal osteoporosis as there have been only a few small clinical trials of patients with chronic liver disease. Bisphosphonates are the mainstay of treatment; they have been shown to be effective in biliary disease and are well tolerated.
Collapse
Affiliation(s)
- Jane Collier
- Department of Hepatology, John Radcliffe Hospital, Headington, Oxford, United Kingdom
| |
Collapse
|
89
|
Hashimoto T, Shigetomi M, Ohno T, Matsunaga T, Muramatsu K, Tanaka H, Sugiyama T, Taguchi T. Sequential treatment with intermittent low-dose human parathyroid hormone (1-34) and bisphosphonate enhances large-size skeletal reconstruction by vascularized bone transplantation. Calcif Tissue Int 2007; 81:232-9. [PMID: 17674071 DOI: 10.1007/s00223-007-9056-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/18/2007] [Accepted: 06/27/2007] [Indexed: 10/23/2022]
Abstract
Vascularized bone transplantation enables reconstruction of large skeletal defects, but this process needs a long time. Since short-term intermittent parathyroid hormone (PTH) enhances rat fracture healing, we investigated the effects of 4-week intermittent low-dose (10 microg/kg/day) or high-dose (100 microg/kg/day) PTH followed by 4-week vehicle, low-dose or high-dose intermittent PTH, or zoledronic acid (ZOL, 2 micro/kg/week), a potent bisphosphonate, on large skeletal reconstruction by vascularized tibial grafting in rats. Compared to 8-week vehicle, 8-week low-dose PTH did not significantly increase the serum osteocalcin level as well as the urinary deoxypyridinoline level, while 4-week low-dose or high-dose PTH followed by 4-week ZOL decreased both of these levels. Eight-week PTH increased the bone mass of the graft and strength of the reconstructed skeleton in a dose-dependent manner; notably, the reconstructed skeleton showed an obviously higher response to PTH compared to the contralateral nonoperated femur. In contrast, 4-week PTH followed by 4-week vehicle reduced these effects and caused local bone loss at the host-graft junctions. Four-week PTH followed by 4-week ZOL did not induce such bone loss; however, 4-week high-dose PTH followed by 4-week ZOL caused a large callus in the distal cortical junction. Four-week PTH followed by 4-week ZOL increased the bone mass and strength similarly to 8-week PTH. These preliminary findings suggest, for the first time, that sequential treatment with short-term intermittent low-dose PTH and bisphosphonate as well as long-term intermittent low-dose PTH treatment enhance large skeletal reconstruction by vascularized bone transplantation, though early timing of sequential antiresorptive treatment could result in delay of bone repair.
Collapse
Affiliation(s)
- Takahiro Hashimoto
- Department of Orthopedic Surgery, Yamaguchi University School of Medicine, 1-1-1 Minamikogushi, Yamaguchi 755-8505, Japan
| | | | | | | | | | | | | | | |
Collapse
|
90
|
Kulak CAM, Borba VZC, Kulak Júnior J, Shane E. Transplantation osteoporosis. ACTA ACUST UNITED AC 2007; 50:783-92. [PMID: 17117303 DOI: 10.1590/s0004-27302006000400023] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2006] [Accepted: 06/10/2006] [Indexed: 11/21/2022]
Abstract
In the past two decades, there has been a rapid increase in the number of organ transplanted worldwide, including Brazil, along with an improvement in survival and quality of life of the transplant recipients. Osteoporosis and a high incidence of fragility fractures have emerged as a complication of organ transplantation. Many factors contribute to the pathogenesis of osteoporosis following organ transplantation. In addition, most patients have some form of bone disease prior to transplantation, which is usually related to adverse effects of end-stage organ failure on the skeleton. This chapter reviews the mechanisms of bone loss that occur both in the early and late post-transplant periods, as well as the features specific to bone loss after kidney, lung, liver, cardiac and bone marrow transplantation. Prevention and treatment for osteoporosis should be instituted prior and in the early and late phase after transplantation, and will also be addressed in this article.
Collapse
Affiliation(s)
- Carolina A M Kulak
- SEMPR, Department of Endocrinology and Metabology, Federal University of Parana, PR, Brazil
| | | | | | | |
Collapse
|
91
|
Bodingbauer M, Wekerle T, Pakrah B, Roschger P, Peck-Radosavljevic M, Silberhumer G, Grampp S, Rockenschaub S, Berlakovich G, Steininger R, Klaushofer K, Oberbauer R, Mühlbacher F. Prophylactic bisphosphonate treatment prevents bone fractures after liver transplantation. Am J Transplant 2007; 7:1763-9. [PMID: 17511759 DOI: 10.1111/j.1600-6143.2007.01844.x] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
A randomized controlled prospective open-label single center trial was performed. At the time of transplantation patients were randomly assigned to one of two treatment arms: The study group of 47 patients received zoledronic acid (ZOL, 8 infusions at 4 mg during the first 12 months after LT), calcium (1000 mg/d) and vitamin D (800 IE/d). The control group consisted of 49 patients who received calcium and vitamin D at same doses (CON). The incidence of bone fractures or death was predefined as the primary endpoint. Secondary endpoints included bone mineral density (BMD), serum biochemical markers of bone metabolism, parameters of trabecular bone histomorphometry and mineralization density distribution (BMDD). Patients were followed up for 24 months. Analysis was performed on an intention-to-treat basis. The primary endpoint fracture or death was reached in 26% of patients in the ZOL group and 46% in the CON group (p = 0.047, log rank test). Densitometry results were different between the groups at the femoral neck at 6 months after LT (mean+/-SD BMD ZOL: 0.80 +/- 0.19 g/cm2 vs. CON: 0.73 +/- 0.14 g/cm2, p = 0.036). Mixed linear models of biochemical bone markers showed less increase of osteocalcin in the ZOL group and histomorphometry and BMDD indicated a reduction in bone turnover. Prophylactic treatment with the bisphosphonate zoledronic acid reduces bone turnover and fractures after liver transplantation.
Collapse
Affiliation(s)
- M Bodingbauer
- Division of Transplantation, Department of Surgery, Medical University of Vienna, Vienna, Austria.
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
92
|
Pengel L, Barcena L, Morris PJ. Registry of randomized controlled trials in transplantation: January 1 to June 30, 2006. Transplantation 2007; 83:1001-14. [PMID: 17452884 DOI: 10.1097/01.tp.0000260740.17516.4d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Affiliation(s)
- Liset Pengel
- Centre for Evidence in Transplantation, Clinical Effectiveness Unit, Royal College of Surgeons of England and London School of Hygiene and Tropical Medicine, University of London, London, United Kingdom
| | | | | |
Collapse
|
93
|
Abstract
Transplantation is an established therapy for end-stage diseases of the kidney, endocrine pancreas, heart, liver, and lung, and for many hematologic disorders. Improved survival rates have been accompanied by increased recognition of previously neglected long-term complications of transplantation such as fractures and osteoporosis. Pretransplantation bone disease and immunosuppressive therapy result in rapid bone loss and increased fracture rates early after transplantation. Patients should be assessed and pretransplantation bone disease should be treated. Preventive therapy initiated in the immediate posttransplantation period is indicated in patients with osteopenia or osteoporosis, as further bone loss will occur in the first several months after transplantation. Long-term organ transplant recipients should also have bone mass measurement and treatment of osteoporosis. Bisphosphonates are the most promising approach for the management of transplantation osteoporosis. Active vitamin D metabolites may have additional benefits in reducing hyperparathyroidism, particularly after kidney transplantation. Large, multicenter treatment trials with oral or parenteral bisphosphonates and calcitriol are recommended.
Collapse
Affiliation(s)
- Peter R Ebeling
- Department of Medicine (RMH/WH), University of Melbourne, Western Hospital, Footscray Vic 3011, Australia.
| |
Collapse
|
94
|
Abstract
Bisphosphonates, which are potent bone resorption inhibitors, currently are the mainstay of treatment for osteoporosis. Antifracture efficacy has been demonstrated for at least three nitrogen-containing bisphosphonates in oral formulations that are designed to be administered in weekly or monthly dosing regimens. Frequent reports of adverse events, primarily related to the upper gastrointestinal tract, and the strict dosing schedule necessary for oral bisphosphonate therapy are considered the major reasons for disappointing adherence to therapy. New intravenous formulations have been developed that allow dosing at very long intervals, thus avoiding the gastrointestinal complications associated with oral bisphosphonates and, it is hoped, improving compliance, particularly for patients who are intolerant of oral bisphosphonates or have contraindications to their use. This alternative approach holds promise for improved outcomes of osteoporosis treatment and ultimately for reduced health care costs related to caring for people with fragility fractures.
Collapse
Affiliation(s)
- Roberto Civitelli
- Division of Bone and Mineral Diseases, Washington University in St. Louis, 660 S. Euclid Avenue, St. Louis, MO 63110, USA.
| | | | | |
Collapse
|
95
|
Sethi A, Stravitz RT. Review article: medical management of the liver transplant recipient - a primer for non-transplant doctors. Aliment Pharmacol Ther 2007; 25:229-45. [PMID: 17217455 DOI: 10.1111/j.1365-2036.2006.03166.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
BACKGROUND Survival 10 years after orthotopic liver transplantation now approaches 65%. Consequently, community doctors must manage the metabolic and neoplastic complications of orthotopic liver transplantation in an ageing population. AIMS To review common sources of morbidity and mortality in long-term orthotopic liver transplantation recipients, and to make evidence-based recommendations regarding their management. METHODS Pertinent studies and reviews were identified by literature search through PubMed. Where evidence-based recommendations could not be gleaned from the literature, expert opinion was obtained from syllabi of national meetings. RESULTS The two most common causes of morbidity and mortality in orthotopic liver transplantation recipients are atherosclerotic vascular disease and de novo malignancy. The pathogenesis of many complications begins before orthotopic liver transplantation, and many are potentially modifiable. Most complications, however, can be directly ascribed to immunosuppressive agents. Despite improvements in our understanding of the pathogenesis and epidemiology of the metabolic and neoplastic complications of orthotopic liver transplantation, remarkably few randomized-controlled studies exist to define their optimal management. CONCLUSIONS Orthotopic liver transplantation recipients experience and succumb to the same afflictions of old age as non-transplant patients, but with greater frequency and at an earlier age. Most recommendations regarding surveillance for, and treatment of, medical complications of orthotopic liver transplantation remain based upon expert opinion rather than evidence-based medicine.
Collapse
Affiliation(s)
- A Sethi
- Section of Hepatology and Liver Transplant Program, Virginia Commonwealth University, Richmond, VA 23298-0341, USA
| | | |
Collapse
|
96
|
Crawford BA, Labio ED, Strasser SI, McCaughan GW. Vitamin D replacement for cirrhosis-related bone disease. ACTA ACUST UNITED AC 2006; 3:689-99. [PMID: 17130879 DOI: 10.1038/ncpgasthep0637] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2006] [Accepted: 08/23/2006] [Indexed: 12/17/2022]
Abstract
The osteoporotic fracture rate in patients with chronic liver disease is approximately twice that of age-matched, control individuals. About 66% of patients with moderately severe cirrhosis and 96% of patients awaiting liver transplantation have vitamin D deficiency. Studies have shown a strong correlation between vitamin D deficiency and bone density, particularly in the hip. Previous studies of vitamin D therapy in cirrhosis-related bone disease have had major design flaws. Most reports and guidelines on the treatment of hepatic bone disease have concluded that vitamin D deficiency does not have a significant pathogenetic role in the development of osteoporosis in cirrhosis, and that there is no evidence for a therapeutic effect of vitamin D supplementation. Conversely, it is generally recommended that patients with cirrhosis and low bone density should receive calcium and vitamin D supplementation; yet there is a paucity of reliable data on the optimal doses to use, as well as a lack of clearly demonstrated benefit. We believe that clinical trials of vitamin D therapy in these patients with liver disease are warranted. As low-dose oral supplementation often will not normalize vitamin D levels or suppress parathyroid hormone activity in cirrhotic patients, high-dose, parenteral vitamin D might be preferable, but further long-term studies are required to assess the benefits and safety of this approach.
Collapse
Affiliation(s)
- Bronwyn A Crawford
- Royal Prince Alfred Hospital and Concord General Repatriation Hospital, and a Senior Clinical Lecturer in the Faculty of Medicine at the University of Sydney, Australia.
| | | | | | | |
Collapse
|
97
|
Grigg AP, Shuttleworth P, Reynolds J, Schwarer AP, Szer J, Bradstock K, Hui C, Herrmann R, Ebeling PR. Pamidronate reduces bone loss after allogeneic stem cell transplantation. J Clin Endocrinol Metab 2006; 91:3835-43. [PMID: 16835281 DOI: 10.1210/jc.2006-0684] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
BACKGROUND Rapid bone loss occurs from the proximal femur after allogeneic stem cell transplantation (alloSCT). OBJECTIVE The objective of the study was to evaluate effects of high-dose pamidronate therapy on bone loss (BMD) after alloSCT. DESIGN This was a randomized, multicenter, open-label, 12-month prospective study of iv pamidronate (90 mg/month) beginning before conditioning vs. no pamidronate. All 116 patients also received calcitriol (0.25 microg/d) and calcium (1000 mg/d), which were continued for another year. MAIN OUTCOME MEASURES Primary objectives were to compare changes in BMD 12 months after alloSCT at the femoral neck, lumbar spine, and total hip between the treatment arms and assess influences of glucocorticoid and cyclosporin therapy on these changes. RESULTS Pamidronate reduced bone loss at the spine, femoral neck, and total hip by 5.6, 7.7, and 4.9% (all P < or = 0.003), respectively, at 12 months. However, BMD of the femoral neck and total hip was still 2.8 and 3.5% lower than baseline, respectively (P < 0.05) with pamidronate. Only differences at the total hip remained significant between the two groups at 24 months. Benefits were restricted to patients receiving an average daily prednisolone dose greater than 10 mg and cyclosporin therapy for more than 5 months within the first 6 months of alloSCT. CONCLUSIONS Pamidronate markedly reduced but did not completely prevent postallogeneic bone marrow transplantation bone loss. BMD benefits were greatest in patients on higher doses of immunosuppressive therapy, but most were lost 12 months after stopping pamidronate. Studies of more potent bisphosphonates or anabolic therapy with PTH after alloSCT are warranted with the aim of durable maintenance of bone mass.
Collapse
Affiliation(s)
- A P Grigg
- Department of Medicine, University of Melbourne, Western Hospital, Footscray 3011, Australia
| | | | | | | | | | | | | | | | | |
Collapse
|
98
|
Affiliation(s)
- Albert Parés
- Liver Unit, Digestive Diseases Institute and Metabolic Bone Diseases Unit, Department of Rheumatology Hospital Clínic, IDIBAPS, Barcelona, Spain.
| | | |
Collapse
|
99
|
|