Zoledronic acid is a new, highly potent bisphosphonate drug under clinical evaluation. A radioimmunoassay has been developed to determine zoledronic acid concentration in human serum, plasma, and urine. The assay utilizes rabbit polyclonal antisera against a zoledronic acid-BSA conjugate and a [125I]zoledronic acid derivative as tracer in a competitive format adapted to microtiter plates. The assay shows a LLOQ 0.4 ng/ml in serum or plasma (interassay%CV=17%, accuracy 97%), 5 ng/ml in urine (21%, 98%). In 23 patients receiving 4, 8 or 16 mg of zoledronic acid, drug concentrations in plasma were dose proportional and showed a multiphasic profile, followed by a prolonged gradual decline to concentrations near the LLOQ. Zoledronic acid disposition in plasma and the recovery of only 40-50% of the dose in urine are consistent with the rapid and extensive uptake by and slow release from bone in parallel with renal clearance, typically shown by bisphosphonates.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/s0731-7085(02)00218-2 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Osteoporosis Caused by Monoallelic Variant of WNT1 Gene in Four Pediatric Patients.
Am J Med Genet A
January 2025
Department of Endocrinology, Genetics and Metabolism, Beijing Children's Hospital, Capital Medical University, Beijing, China.
Pediatric patients of autosomal dominant early onset osteoporosis conferred by heterozygous mutation in the WNT1 (OMIM: 615221) were rarely reported, and therapy in pediatrics is relatively inexperienced. The clinical and genotypic characteristics and treatment process of four children with osteoporosis caused by WNT1 monoallelic variation were analyzed. The patients admitted from June 2023 to January 2024.
View Article and Find Full Text PDFBisphosphonate-mineralized nano-IFNγ suppresses residual tumor growth caused by incomplete radiofrequency ablation through metabolically remodeling tumor-associated macrophages.
Theranostics
January 2025
Beijing Key Laboratory of Molecular Pharmaceutics and Drug Delivery Systems, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China.
Radiofrequency ablation (RFA), as a minimally invasive surgery strategy based on local thermal-killing effect, is widely used in the clinical treatment of multiple solid tumors. Nevertheless, RFA cannot achieve the complete elimination of tumor lesions with larger burden or proximity to blood vessels. Incomplete RFA (iRFA) has even been validated to promote residual tumor growth due to the suppressive tumor immune microenvironment (TIME).
View Article and Find Full Text PDFComparative Analysis of Extracorporeal Shockwave Therapy, Bisphosphonate, and Wharton Jelly-Derived Mesenchymal Stem Cells in Preserving Bone and Cartilage Integrity and Modulating IL31, IL33, and BMP2 in the Cartilage of Ovariectomized Rat Model.
Biomedicines
December 2024
Department of Orthopedic Surgery, Sports Medicine, Kaohsiung Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Kaohsiung 833, Taiwan.
Osteoporosis (OP) is a chronic inflammatory bone disease characterized by reduced bone structure and strength, leading to increased fracture risk. Effective therapies targeting both bone and cartilage are limited. This study compared the therapeutic effects of extracorporeal shockwave therapy (ESWT), bisphosphonate (Aclasta), and human Wharton jelly-derived mesenchymal stem cells (WJMSCs) in a rat model of OP.
View Article and Find Full Text PDFCraniofacial Effects of Zoledronic Acid on the Osteogenesis Imperfecta Mouse (-/-) Model of Severe Osteogenesis Imperfecta.
Biomedicines
November 2024
Pole of Morphology, Institute of Experimental and Clinical Research, UCLouvain, 1200 Brussels, Belgium.
Osteogenesis imperfecta (OI) is a rare genetic disorder affecting mainly type I collagen, which leads to bone fragility and deformities. OI patients also present craniofacial abnormalities such as macrocephaly and malocclusion. Recently, craniofacial dysmorphism was highlighted in the osteogenesis imperfecta mouse (oim), a validated model of the most severe form of OI.
View Article and Find Full Text PDFZoledronic Acid Regulates Osteoclasts via miR-483-5p in the BRONJ.
Oral Dis
January 2025
State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China.
Objectives: Bisphosphonate-related osteonecrosis of the jaw (BRONJ) is a severe complication of bisphosphonate therapy, with unclear mechanisms. This study investigates the regulatory impact of zoledronic acid (ZOL) on osteoclasts and microRNA (miRNA) expression.
Materials And Methods: Raw264.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!