A1 Journal article – refereed
Teriparatide Treatment in Patients With WNT1 or PLS3 Mutation-Related Early-Onset Osteoporosis: A Pilot Study

List of Authors: Valimaki VV, Makitie O, Pereira R, Laine C, Wesseling-Perry K, Maatta J, Kirjavainen M, Viljakainen H, Valimaki MJ
Publication year: 2017
Journal: Journal of Clinical Endocrinology and Metabolism
Journal acronym: J CLIN ENDOCR METAB
Volume number: 102
Issue number: 2
Number of pages: 10
ISSN: 0021-972X
eISSN: 1945-7197

Context: We previously identified 2 Finnish families with dominantly inherited, low-turnover osteoporosis caused by mutations in WNT1 or PLS3.Objective, Design, and Setting: This prospective, longitudinal, uncontrolled study was undertaken to evaluate whether these patients respond to teriparatide.Patients and Intervention: We recruited 6 adults (median age, 54 years); 3 with a WNT1 missense mutation, c.652T>G, and 3 with a PLS3 splice mutation, c.73-24T>A, to receive teriparatide 20 mg daily for 24 months. Five patients had previously used bisphosphonates.Main Outcome Measures: Outcome measures included lumbar spine and hip bone mineral density (BMD) by dual-energy X-ray absorptiometry, distal radius peripheral quantitative computed tomography, spinal radiography, serum bone turnover markers, paired iliac crest biopsies.Results: All patients showed increases in formation markers procollagen type 1 amino-terminal propeptide (90% to 398%) and osteocalcin (50% to 280%) and in resorption markers cross-linked C-terminal telopeptide of type I collagen (58% to 457%) and tartrate-resistant acid phosphatase 5b (20% to 68%) in first 6 months. Lumbar spine BMD increased 5.2% to 7.9% in 5 patients and femoral neck BMD 2.6% to 7.8% in 4 patients in 24 months. Distal radius cortical volumetric BMD decreased 5.4% to 26.1%. In histomorphometric analyses, osteoid indices increased more consistently in patients with WNT1 vs PLS3 mutation. Eroded surface decreased 44% to 100% in all patients. Adipocyte number increased in 5 patients studied.Conclusions: Patients with WNT1 or PLS3 mutation-related osteoporosis responded to teriparatide treatment. Future studies are needed to evaluate whether observed changes translate to fracture resistance.

Last updated on 2019-20-07 at 03:43