1
|
CORM-3 Attenuates Oxidative Stress-Induced Bone Loss via the Nrf2/HO-1 Pathway. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2022; 2022:5098358. [PMID: 36035220 PMCID: PMC9402314 DOI: 10.1155/2022/5098358] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Accepted: 08/05/2022] [Indexed: 12/01/2022]
Abstract
Bone metabolism occurs in the entire life of an individual and is required for maintaining skeletal homeostasis. The imbalance between osteogenesis and osteoclastogenesis eventually leads to osteoporosis. Oxidative stress is considered a major cause of bone homeostasis disorder, and relieving excessive oxidative stress in bone mesenchymal stem cells (BMSCs) is a potential treatment strategy for osteoporosis. Carbon monoxide releasing molecule-3 (CORM-3), the classical donor of carbon monoxide (CO), possesses antioxidation, antiapoptosis, and anti-inflammatory properties. In our study, we found that CORM-3 could reduce reactive oxygen species (ROS) accumulation and prevent mitochondrial dysfunction thereby restoring the osteogenic potential of the BMSCs disrupted by hydrogen peroxide (H2O2) exposure. The action of CORM-3 was preliminarily considered the consequence of Nrf2/HO-1 axis activation. In addition, CORM-3 inhibited osteoclast formation in mouse primary bone marrow monocytes (BMMs) by inhibiting H2O2-induced polarization of M1 macrophages and endowing macrophages with M2 polarizating ability. Rat models further demonstrated that CORM-3 treatment could restore bone mass and enhance the expression of Nrf2 and osteogenic markers in the distal femurs. In summary, CORM-3 is a potential therapeutic agent for the treatment of osteoporosis.
Collapse
|
2
|
Akhter MP, Recker RR. High resolution imaging in bone tissue research-review. Bone 2021; 143:115620. [PMID: 32866682 DOI: 10.1016/j.bone.2020.115620] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Revised: 08/21/2020] [Accepted: 08/24/2020] [Indexed: 12/14/2022]
Abstract
This review article focuses on imaging of bone tissue to understand skeletal health with regards to bone quality. Skeletal fragility fractures are due to bone diseases such as osteoporosis which result in low bone mass and bone mineral density (BMD) leading to high risk of fragility fractures. Recent advances in imaging and analysis technologies have highly benefitted the field of biological sciences. In particular, their application in skeletal health has been of significant importance in understanding bone mechanical behavior (structure and properties) at the tissue level. While synchrotron based microCT technique has remained the gold standard for non-destructive evaluation of structure in material and biological sciences, several lab based microCT systems have been developed to provide high resolution imaging of specimens with greater access, and ease of use in laboratory settings. Lab based microCT scanners are widely used in the bone field as a standard tool to evaluate three-dimensional (3D) morphologies of bone structure at image resolutions appropriate for bone samples from small animals to bone biopsy specimens from humans. Both synchrotron and standard lab based microCT systems provide high resolution imaging ex vivo for a small sized specimen. A few X-ray based systems are also commercially available for in vivo scanning at relatively low image resolutions. Synchrotron-based CT microscopy is being used for various ultra-high-resolution image analyses using complex 3D software. However, the synchrotron-based CT technology is in high demand, allows only limited numbers of specimens, expensive, requires complex additional instrumentation, and is not easily available to researchers as it requires access to a synchrotron source which is always limited. Therefore, desktop laboratory scanners (microXCT, Zeiss/Xradia, Scanco, SkyScan. etc.), mimicking the synchrotron based CT technology or image resolution, have been developed to solve the accessibility issues. These lab based scanners have helped both material science, and the bone field to investigate bone tissue morphologies at submicron mage resolutions. Considerable progress has been made in both in vivo and ex vivo imaging towards providing high resolution images of bone tissue. Both clinical and research imaging technologies will continue to improve and help understand osteoporosis and other related skeletal issues in order to develop targeted treatments for bone fragility. This review summarizes the high resolution imaging work in bone research.
Collapse
Affiliation(s)
- M P Akhter
- Creighton University Osteoporosis Research Center, Omaha, NE, United States of America.
| | - R R Recker
- Creighton University Osteoporosis Research Center, Omaha, NE, United States of America
| |
Collapse
|
3
|
Schepper JD, Collins F, Rios-Arce ND, Kang HJ, Schaefer L, Gardinier JD, Raghuvanshi R, Quinn RA, Britton R, Parameswaran N, McCabe LR. Involvement of the Gut Microbiota and Barrier Function in Glucocorticoid-Induced Osteoporosis. J Bone Miner Res 2020; 35:801-820. [PMID: 31886921 DOI: 10.1002/jbmr.3947] [Citation(s) in RCA: 96] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Revised: 12/05/2019] [Accepted: 12/14/2019] [Indexed: 12/14/2022]
Abstract
Glucocorticoids (GCs) are potent immune-modulating drugs with significant side effects, including glucocorticoid-induced osteoporosis (GIO). GCs directly induce osteoblast and osteocyte apoptosis but also alter intestinal microbiota composition. Although the gut microbiota is known to contribute to the regulation of bone density, its role in GIO has never been examined. To test this, male C57/Bl6J mice were treated for 8 weeks with GC (prednisolone, GC-Tx) in the presence or absence of broad-spectrum antibiotic treatment (ABX) to deplete the microbiota. Long-term ABX prevented GC-Tx-induced trabecular bone loss, showing the requirement of gut microbiota for GIO. Treatment of GC-Tx mice with a probiotic (Lactobacillus reuteri [LR]) prevented trabecular bone loss. Microbiota analyses indicated that GC-Tx changed the abundance of Verrucomicobiales and Bacteriodales phyla and random forest analyses indicated significant differences in abundance of Porphyromonadaceae and Clostridiales operational taxonomic units (OTUs) between groups. Furthermore, transplantation of GC-Tx mouse fecal material into recipient naïve, untreated WT mice caused bone loss, supporting a functional role for microbiota in GIO. We also report that GC caused intestinal barrier breaks, as evidenced by increased serum endotoxin level (2.4-fold), that were prevented by LR and ABX treatments. Enhancement of barrier function with a mucus supplement prevented both GC-Tx-induced barrier leakage and trabecular GIO. In bone, treatment with ABX, LR or a mucus supplement reduced GC-Tx-induced osteoblast and osteocyte apoptosis. GC-Tx suppression of Wnt10b in bone was restored by the LR and high-molecular-weight polymer (MDY) treatments as well as microbiota depletion. Finally, we identified that bone-specific Wnt10b overexpression prevented GIO. Taken together, our data highlight the previously unappreciated involvement of the gut microbiota and intestinal barrier function in trabecular GIO pathogenesis (including Wnt10b suppression and osteoblast and osteocyte apoptosis) and identify the gut as a novel therapeutic target for preventing GIO. © 2019 American Society for Bone and Mineral Research.
Collapse
Affiliation(s)
| | - Fraser Collins
- Department of Physiology, Michigan State University, East Lansing, MI, USA
| | - Naiomy Deliz Rios-Arce
- Department of Physiology, Michigan State University, East Lansing, MI, USA.,Comparative Medicine and Integrative Biology Program, Michigan State University, East Lansing, MI, USA
| | - Ho Jun Kang
- Department of Physiology, Michigan State University, East Lansing, MI, USA
| | - Laura Schaefer
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, USA
| | | | - Ruma Raghuvanshi
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, MI, USA
| | - Robert A Quinn
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, MI, USA
| | - Robert Britton
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, USA
| | | | - Laura R McCabe
- Department of Physiology, Michigan State University, East Lansing, MI, USA
| |
Collapse
|
4
|
Xu XL, Li WS, Wang XJ, Du YL, Kang XQ, Hu JB, Li SJ, Ying XY, You J, Du YZ. Endogenous sialic acid-engineered micelles: a multifunctional platform for on-demand methotrexate delivery and bone repair of rheumatoid arthritis. NANOSCALE 2018; 10:2923-2935. [PMID: 29369319 DOI: 10.1039/c7nr08430g] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Rheumatoid arthritis (RA) patients have suffered from the current drug therapeutic regimen because of its high toxicity and the absence of bone regeneration for existing erosion, seriously affecting the quality of life. Herein, a sialic acid-dextran-octadecanoic acid (SA-Dex-OA) conjugate was synthesized to form micelles with a 55.06 μg mL-1 critical micelle concentration. The obtained micelles can encapsulate a disease-modifying anti-rheumatic drug, methotrexate (MTX), with 4.28% (w/w) drug content, featuring sustained drug release behavior over 48 h. In vitro and in vivo studies showed that SA-Dex-OA micelles significantly improved accumulation and transportation through a combination of SA and E-selectin receptors in inflamed cells and arthritic paws highly expressing E-selectin. MTX-loaded SA-Dex-OA micelles not only significantly inhibited the inflammatory response, but also diminished the adverse effects of MTX, as reflected by the reduced alanine aminotransferase, aspartate aminotransferase, creatinine, and urea nitrogen levels. Most importantly, the bone mineral density in rats treated with MTX-loaded SA-Dex-OA micelles was significantly higher as compared to in those treated with free MTX and Dex-OA/MTX micelles (increasing from 391.4 to 417.4 to 492.7 mg cc-1), benefiting from the effects of endogenous sialic acid in promoting MC3T3-E1 cell differentiation and mineralization. It is anticipated that SA-based micelles with bone repair activities have great potential for RA treatment and other metabolic bone diseases with serious bone erosion.
Collapse
Affiliation(s)
- Xiao-Ling Xu
- Institute of Pharmaceutics, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, PR China.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
5
|
Leib ES, Winzenrieth R. Bone status in glucocorticoid-treated men and women. Osteoporos Int 2016; 27:39-48. [PMID: 26252975 DOI: 10.1007/s00198-015-3211-1] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/12/2015] [Accepted: 06/12/2015] [Indexed: 01/01/2023]
Abstract
UNLABELLED We recorded the results of areal bone mineral density (aBMD) and microarchitecture of the bone measured by trabecular bone score (TBS) in 416 glucocorticoid-treated men and women aged 40 years and older with or without fracture to 1104 controls. TBS better discriminated those with fracture compared to aBMD. These differences were the greatest in men. INTRODUCTION The aim of this study is to evaluate glucocorticoid (GC)-induced effects on areal bone mineral density (aBMD) and bone microarchitectural texture measured by trabecular bone score (TBS). METHODS TBS and aBMD were evaluated at L1-L4 postero-anterior (PA) spine by dual X-ray absorptiometry (DXA) in 1520 men and women aged 40 years and over. Four hundred sixteen subjects who received GCs (≥5 mg/day, for ≥3 months) were matched with 1104 sex-, age-, and BMI-matched control subjects. Clinical data, osteoporotic fractures (OPF), and dietary habits were documented in the medical report. RESULTS GC-treated patients were characterized by a significant decrease of TBS (1.267 vs. 1.298, p < 0.001) compared with control-matched subjects while no change in BMD was observed at any sites. These decreases were even more pronounced when fracture status was taken into account (1.222 vs. 1.298, p < 0.001). The odds ratio (OR) for TBS was 1.44 (1.095-1.89) for OPF, whereas no association was found for BMD at any sites (all p > 0.3). A similar effect on microarchitecture measured by TBS was seen by the presence of fracture as by the use of glucocorticoids. An influence on TBS by sex was also noted with a decrease in TBS of greater magnitude in men. CONCLUSIONS GC-treated individuals have a significant deterioration of bone microarchitectural texture as assessed by TBS which is more marked in those with OPF and in men. TBS seems to be more sensitive than aBMD for GC-related fracture detection and should be a good surrogate indicator of bone health in such secondary osteoporosis.
Collapse
Affiliation(s)
- E S Leib
- Department of Medicine, University of Vermont College of Medicine, Burlington, VT, USA
| | - R Winzenrieth
- R & D Department, Med-Imaps, 5 rue Henri Becquerel, Merignac, 33700, Bordeaux, France.
| |
Collapse
|
6
|
Zou W, Yang S, Zhang T, Sun H, Wang Y, Xue H, Zhou D. Hypoxia enhances glucocorticoid-induced apoptosis and cell cycle arrest via the PI3K/Akt signaling pathway in osteoblastic cells. J Bone Miner Metab 2015; 33:615-24. [PMID: 25230819 DOI: 10.1007/s00774-014-0627-1] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/30/2014] [Accepted: 08/18/2014] [Indexed: 12/12/2022]
Abstract
Although osteonecrosis of the femoral head is a known primary limitation of long-term or high-dose clinical administration of glucocorticoids, the mechanisms underlying this side effect remain unclear. Hypoxia is an important biological state under numerous pathological conditions. In this study, we investigated glucocorticoid-induced osteonecrosis under hypoxic conditions in the MC3T3-E1 osteoblast cell line using a cell cytotoxicity assay, flow cytometry, and western blotting. 6α-Methylprednisolone sodium succinate (MPSL) more effectively induced apoptosis and G0/G1 arrest of MC3T3-E1 osteoblasts under hypoxic conditions than under normoxic conditions. Correspondingly, MPSL more effectively upregulated cellular levels of cleaved caspase 3, p53, and its target p21, and downregulated cyclin D1 levels in hypoxia. Moreover, overexpression of Akt abrogated the MPSL activation of p53, p21, and cleaved caspase 3 and the attenuation of cyclin D1 expression and rescued osteoblasts from MPSL-induced cell cycle arrest and apoptosis, indicating that phosphatidylinositol 3-kinase (PI3K)/Akt signaling might play an essential role in MPSL-induced inhibition of osteoblasts. Furthermore, the suppression of PI3K/Akt signaling and upregualtion of cellular p85α monomer levels by MPSL were more pronounced under hypoxic conditions than under normoxic conditions. Finally, we found that the enhancement of the effects of MPSL under hypoxic conditions was attributed to hypoxia-upregulated glucocorticoid receptor activity. In conclusion, our results demonstrate that MPSL, a synthetic glucocorticoid receptor agonist, promotes the level of p85α and inhibits PI3K/Akt signaling to induce apoptosis and cell cycle arrest in osteoblasts, and that this effect is enhanced under hypoxic conditions.
Collapse
Affiliation(s)
- Wanjing Zou
- Department of Histology and Embryology, School of Basic Medical Sciences, Capital Medical University, Beijing, 100069, People's Republic of China
| | - Shu Yang
- Department of Histology and Embryology, School of Basic Medical Sciences, Capital Medical University, Beijing, 100069, People's Republic of China
| | - Tie Zhang
- Department of Histology and Embryology, School of Basic Medical Sciences, Capital Medical University, Beijing, 100069, People's Republic of China
| | - Haimei Sun
- Department of Histology and Embryology, School of Basic Medical Sciences, Capital Medical University, Beijing, 100069, People's Republic of China
| | - Yuying Wang
- Department of Histology and Embryology, School of Basic Medical Sciences, Capital Medical University, Beijing, 100069, People's Republic of China
| | - Hong Xue
- Department of Histology and Embryology, School of Basic Medical Sciences, Capital Medical University, Beijing, 100069, People's Republic of China
| | - Deshan Zhou
- Department of Histology and Embryology, School of Basic Medical Sciences, Capital Medical University, Beijing, 100069, People's Republic of China.
| |
Collapse
|
7
|
Quan L, Zhang Y, Crielaard BJ, Dusad A, Lele SM, Rijcken CJF, Metselaar JM, Kostková H, Etrych T, Ulbrich K, Kiessling F, Mikuls TR, Hennink WE, Storm G, Lammers T, Wang D. Nanomedicines for inflammatory arthritis: head-to-head comparison of glucocorticoid-containing polymers, micelles, and liposomes. ACS NANO 2014; 8:458-466. [PMID: 24341611 PMCID: PMC3947749 DOI: 10.1021/nn4048205] [Citation(s) in RCA: 118] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
As an emerging research direction, nanomedicine has been increasingly utilized to treat inflammatory diseases. In this head-to-head comparison study, four established nanomedicine formulations of dexamethasone, including liposomes (L-Dex), core-cross-linked micelles (M-Dex), slow releasing polymeric prodrugs (P-Dex-slow), and fast releasing polymeric prodrugs (P-Dex-fast), were evaluated in an adjuvant-induced arthritis rat model with an equivalent dose treatment design. It was found that after a single i.v. injection, the formulations with the slower drug release kinetics (i.e., M-Dex and P-Dex-slow) maintained longer duration of therapeutic activity than those with relatively faster drug release kinetics, resulting in better joint protection. This finding will be instructional in the future development and optimization of nanomedicines for the clinical management of rheumatoid arthritis. The outcome of this study also illustrates the value of such head-to-head comparison studies in translational nanomedicine research.
Collapse
Affiliation(s)
- Lingdong Quan
- Department of Pharmaceutical Sciences, University of Nebraska Medical Center, Omaha, Nebraska 68198, (USA)
| | - Yijia Zhang
- Department of Pharmaceutical Sciences, University of Nebraska Medical Center, Omaha, Nebraska 68198, (USA)
| | - Bart J. Crielaard
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht, (The Netherlands)
| | - Anand Dusad
- Department of Pharmaceutical Sciences, University of Nebraska Medical Center, Omaha, Nebraska 68198, (USA)
| | - Subodh M. Lele
- Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha, Nebraska 68198, (USA)
| | | | - Josbert M Metselaar
- Department of Targeted Therapeutics, MIRA Institute for Biomedical Technology and Technical Medicine, University of Twente, PO Box 217, 7500 AE, Enschede (The Netherlands)
| | - Hana Kostková
- Institute of Macromolecular Chemistry AS CR, v.v.i., Heyrovského nám. 2, 162 06 Prague 6, (Czech Republic)
| | - Tomáš Etrych
- Institute of Macromolecular Chemistry AS CR, v.v.i., Heyrovského nám. 2, 162 06 Prague 6, (Czech Republic)
| | - Karel Ulbrich
- Institute of Macromolecular Chemistry AS CR, v.v.i., Heyrovského nám. 2, 162 06 Prague 6, (Czech Republic)
| | - Fabian Kiessling
- Department of Experimental Molecular Imaging, University Clinic and Helmholtz Institute for Biomedical Engineering, RWTH - Aachen University, Pauwelsstrasse 30, 52074 Aachen (Germany)
| | - Ted R. Mikuls
- Omaha VA Medical Center, 4101 Woolworth Avenue, Omaha, (USA)
- Department Internal Medicine, Division of Rheumatology, University of Nebraska Medical Center, Omaha, NE 68198, (USA)
| | - Wim E. Hennink
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht, (The Netherlands)
| | - Gert Storm
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht, (The Netherlands)
- Department of Targeted Therapeutics, MIRA Institute for Biomedical Technology and Technical Medicine, University of Twente, PO Box 217, 7500 AE, Enschede (The Netherlands)
| | - Twan Lammers
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht, (The Netherlands)
- Department of Targeted Therapeutics, MIRA Institute for Biomedical Technology and Technical Medicine, University of Twente, PO Box 217, 7500 AE, Enschede (The Netherlands)
- Department of Experimental Molecular Imaging, University Clinic and Helmholtz Institute for Biomedical Engineering, RWTH - Aachen University, Pauwelsstrasse 30, 52074 Aachen (Germany)
| | - Dong Wang
- Department of Pharmaceutical Sciences, University of Nebraska Medical Center, Omaha, Nebraska 68198, (USA)
| |
Collapse
|
8
|
Yuan F, Tabor DE, Nelson RK, Yuan H, Zhang Y, Nuxoll J, Bynoté KK, Lele SM, Wang D, Gould KA. A dexamethasone prodrug reduces the renal macrophage response and provides enhanced resolution of established murine lupus nephritis. PLoS One 2013; 8:e81483. [PMID: 24312306 PMCID: PMC3842961 DOI: 10.1371/journal.pone.0081483] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2013] [Accepted: 10/22/2013] [Indexed: 12/03/2022] Open
Abstract
We evaluated the ability of a macromolecular prodrug of dexamethasone (P-Dex) to treat lupus nephritis in (NZB × NZW)F1 mice. We also explored the mechanism underlying the anti-inflammatory effects of this prodrug. P-Dex eliminated albuminuria in most (NZB × NZW)F1 mice. Furthermore, P-Dex reduced the incidence of severe nephritis and extended lifespan in these mice. P-Dex treatment also prevented the development of lupus-associated hypertension and vasculitis. Although P-Dex did not reduce serum levels of anti-dsDNA antibodies or glomerular immune complexes, P-Dex reduced macrophage recruitment to the kidney and attenuated tubulointerstitial injury. In contrast to what was observed with free dexamethasone, P-Dex did not induce any deterioration of bone quality. However, P-Dex did lead to reduced peripheral white blood cell counts and adrenal gland atrophy. These results suggest that P-Dex is more effective and less toxic than free dexamethasone for the treatment of lupus nephritis in (NZB × NZW)F1 mice. Furthermore, the data suggest that P-Dex may treat nephritis by attenuating the renal inflammatory response to immune complexes, leading to decreased immune cell infiltration and diminished renal inflammation and injury.
Collapse
Affiliation(s)
- Fang Yuan
- Department of Pharmaceutical Sciences, University of Nebraska Medical Center, Omaha, Nebraska, United States of America
| | - Dana E. Tabor
- Department of Genetics, Cell Biology & Anatomy, University of Nebraska Medical Center, Omaha, Nebraska, United States of America
| | - Richard K. Nelson
- Department of Genetics, Cell Biology & Anatomy, University of Nebraska Medical Center, Omaha, Nebraska, United States of America
| | - Hongjiang Yuan
- Department of Pharmaceutical Sciences, University of Nebraska Medical Center, Omaha, Nebraska, United States of America
| | - Yijia Zhang
- Department of Pharmaceutical Sciences, University of Nebraska Medical Center, Omaha, Nebraska, United States of America
| | - Jenny Nuxoll
- Department of Genetics, Cell Biology & Anatomy, University of Nebraska Medical Center, Omaha, Nebraska, United States of America
| | - Kimberly K. Bynoté
- Department of Genetics, Cell Biology & Anatomy, University of Nebraska Medical Center, Omaha, Nebraska, United States of America
| | - Subodh M. Lele
- Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha, Nebraska, United States of America
| | - Dong Wang
- Department of Pharmaceutical Sciences, University of Nebraska Medical Center, Omaha, Nebraska, United States of America
- * (DW); (KAG)
| | - Karen A. Gould
- Department of Genetics, Cell Biology & Anatomy, University of Nebraska Medical Center, Omaha, Nebraska, United States of America
- * (DW); (KAG)
| |
Collapse
|
9
|
Yuan F, Nelson RK, Tabor DE, Zhang Y, Akhter MP, Gould KA, Wang D. Dexamethasone prodrug treatment prevents nephritis in lupus-prone (NZB × NZW)F1 mice without causing systemic side effects. ACTA ACUST UNITED AC 2013; 64:4029-39. [PMID: 22886616 DOI: 10.1002/art.34667] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2011] [Accepted: 08/02/2012] [Indexed: 01/31/2023]
Abstract
OBJECTIVE To evaluate the potentially improved therapeutic efficacy and safety of nephrotropic macromolecular prodrugs of glucocorticoids (GCs) for the treatment of lupus nephritis. METHODS Lupus-prone female (NZB × NZW)F1 mice received monthly injections of N-(2-hydroxypropyl) methacrylamide copolymer-based dexamethasone prodrug (P-Dex) or daily injections of dexamethasone phosphate sodium (Dex; overall dose equivalent to that of P-Dex) for 2 months. During treatment, the mice were monitored for albuminuria, mean arterial pressure, and serum autoantibody levels. Nephritis, renal immune complex levels, and macrophage infiltration were evaluated histologically. Bone quality was analyzed using peripheral dual x-ray absorptiometry and micro-computed tomography. The in vivo distribution of P-Dex was investigated using optical imaging, immunohistochemistry, and fluorescence-activated cell sorting (FACS). The antiinflammatory effect of P-Dex was validated using lipopolysaccharide-activated human proximal tubule epithelial (HK-2) cells. RESULTS Monthly P-Dex injections completely abolished albuminuria in the (NZB × NZW)F1 mice; this approach was significantly more efficacious than daily Dex treatment. P-Dex treatment did not reduce serum levels of anti-double-stranded DNA antibodies or renal immune complexes but did decrease macrophage infiltration, which is a marker of chronic inflammation. Immunohistochemical and FACS analyses revealed that P-Dex was primarily sequestered by proximal tubule epithelial cells, and that it could attenuate the inflammatory response in HK-2 cell culture. In contrast to Dex treatment, P-Dex treatment did not lead to any significant deterioration of bone quality or reduction in the level of total serum IgG. CONCLUSION Macromolecularization of GCs renders them nephrotropic. Protracted retention, subcellular processing, and activation of GC prodrugs by kidney cells would potentiate nephritis resolution, with a reduced risk of systemic toxicities.
Collapse
Affiliation(s)
- Fang Yuan
- University of Nebraska Medical Center, NE 68198, USA
| | | | | | | | | | | | | |
Collapse
|
10
|
Disuse-related decline in trabecular bone structure. Biomech Model Mechanobiol 2010; 10:423-9. [DOI: 10.1007/s10237-010-0244-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2010] [Accepted: 07/17/2010] [Indexed: 10/19/2022]
|