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NCT02526160

Study of KRN23 in Adults With X-linked Hypophosphatemia (XLH)

Completed Phase 3 Results posted Last updated 18 June 2024
What this trial tests

Phase 3 trial testing burosumab in X-linked Hypophosphatemia in 134 participants. Completed in 6 December 2018.

Timeline
22 October 2015
Primary endpoint
22 December 2016
6 December 2018

Quick facts

Lead sponsorKyowa Kirin, Inc.
PhasePhase 3
StatusCompleted
Study typeINTERVENTIONAL
Allocationrandomized
Designcrossover
Maskingquadruple
Primary purposetreatment
Enrollment134
Start date22 October 2015
Primary completion22 December 2016
Estimated completion6 December 2018
Sites25 locations across France, Italy, Japan, Ireland, United Kingdom, South Korea, United States

Drugs / interventions tested

Conditions studied

Sponsor

Kyowa Kirin, Inc. — full company profile →

Who can join

Adults 18 to 65, any sex, with X-linked Hypophosphatemia. Patients with the condition only — healthy volunteers not accepted.

Results — posted to ClinicalTrials.gov

Per-arm endpoint measurements with 95% confidence intervals where reported. Source: trial results section.

Percentage of Participants Achieving Mean Serum Phosphorus Levels Above the LLN (2.5 mg/dL [0.81 mmol/L]) at the Mid-Point of the Dose Interval, as Averaged Across Dose Cycles Between Baseline and Week 24 Primary · Baseline through Week 24
GroupValue95% CI
Placebo7.63.3 – 16.5
Burosumab92.683.9 – 96.8
Change From Baseline to Week 24 in Brief Pain Inventory (BPI) Question 3 (Q3; Worst Pain in Past 24 Hours) Score Secondary · Baseline, 24 weeks

The BPI evaluates the condition of all pain over the previous 24 hours. Two dimensions are measured: pain severity (worst, least, average, and now) and the impact of pain on functioning (pain interference with general activity, walking, work, mood, enjoyment of life, relations with others, and sleep). Question 3 of the short-form BPI (BPI-Q3) asks subjects to rate their pain at its worst in the last 24 hours on a scale of 0 (no pain) to 10 (pain as bad as you can imagine). From the generalized estimating equation (GEE) model, which includes the change from Baseline for the endpoint of interes

GroupValue95% CI
Placebo-0.32± 0.222
Burosumab-0.79± 0.211
Change From Baseline to Week 24 in the Western Ontario and McMaster University Osteoarthritis Index (WOMAC) Stiffness Score Secondary · Baseline, 24 weeks

The WOMAC is a 24-item participant-reported questionnaire with two domains, Stiffness (2 questions) and Physical Function (17 questions) over the previous 48 hours. The WOMAC is administered in a 5-point Likert-scale format using descriptors of none, mild, moderate, severe, and extreme corresponding to an ordinal scale of 0-4. Higher scores on the WOMAC indicate worse stiffness and functional limitations. Scores are normalized to a 0-100 metric where 0 was the best health state and 100 the worst. The GEE estimates are from the GEE model which includes the change from baseline for WOMAC Stiffn

GroupValue95% CI
Placebo0.46± 3.139
Burosumab-7.85± 3.034
Change From Baseline to Week 24 in the WOMAC Physical Function Score Secondary · Baseline, 24 weeks

The WOMAC is a 24-item participant-reported questionnaire with two domains, Stiffness (2 questions) and Physical Function (17 questions) over the previous 48 hours. The WOMAC is administered in a 5-point Likert-scale format using descriptors of none, mild, moderate, severe, and extreme corresponding to an ordinal scale of 0-4. Higher scores on the WOMAC indicate worse stiffness and functional limitations. Scores are normalized to a 0-100 metric where 0 was the best health state and 100 the worst. The GEE Estimates are from the GEE model which includes the change from baseline for WOMAC Physic

GroupValue95% CI
Placebo1.79± 2.722
Burosumab-3.11± 2.553
Change From Baseline Over Time in BPI Worst Pain Score Secondary · Baseline, Weeks 12, 24, 36, 48, 72, 96

Change from baseline to post-baseline visits in BPI-Q3 (Worst Pain) score as averaged from daily diary scores recorded over 1 week and the study visit score. The BPI evaluates the condition of all pain over the previous 24 hours. Two dimensions are measured: pain severity (worst, least, average, and now) and the impact of pain on functioning (pain interference with general activity, walking, work, mood, enjoyment of life, relations with others, and sleep). Question 3 of the short-form BPI (BPI-Q3) asks subjects to rate their pain at its worst in the last 24 hours on a scale of 0 (no pain) to 1

Change at Week 12
GroupValue95% CI
Placebo-0.37± 0.216
Burosumab 1 mg/kg-0.62± 0.208
Change at Week 24
GroupValue95% CI
Placebo-0.31± 0.242
Burosumab 1 mg/kg-0.77± 0.228
Change at Week 36
GroupValue95% CI
Placebo-1.25± 0.234
Burosumab 1 mg/kg-0.95± 0.228
Change at Week 48
GroupValue95% CI
Placebo-1.49± 0.243
Burosumab 1 mg/kg-1.05± 0.230
Change at Week 72
GroupValue95% CI
Placebo-1.28± 0.283
Burosumab 1 mg/kg-1.21± 0.316
Change at Week 96
GroupValue95% CI
Placebo-0.99± 0.265
Burosumab 1 mg/kg-1.48± 0.299
Change From Baseline Over Time in BPI Pain Severity Score Secondary · Baseline, Weeks 12, 24, 36, 48, 72, 96

Change from baseline to post-baseline visits in BPI pain severity score as averaged from daily diary scores recorded over 1 week and the study visit score. The BPI evaluates the condition of all pain over the previous 24 hours. Two dimensions are measured: pain severity (worst, least, average, and now) and the impact of pain on functioning (pain interference with general activity, walking, work, mood, enjoyment of life, relations with others, and sleep). The severity of pain in the last 24 hours is rated on a scale of 0 (no pain) to 10 (pain as bad as you can imagine). The GEE Estimates are f

Change at Week 12
GroupValue95% CI
Placebo-0.32± 0.166
Burosumab 1 mg/kg-0.43± 0.163
Change at Week 24
GroupValue95% CI
Placebo-0.10± 0.211
Burosumab 1 mg/kg-0.53± 0.172
Change at Week 36
GroupValue95% CI
Placebo-0.97± 0.214
Burosumab 1 mg/kg-0.62± 0.184
Change at Week 48
GroupValue95% CI
Placebo-1.13± 0.205
Burosumab 1 mg/kg-0.79± 0.162
Change at Week 72
GroupValue95% CI
Placebo-1.36± 0.216
Burosumab 1 mg/kg-1.24± 0.231
Change at Week 96
GroupValue95% CI
Placebo-1.18± 0.195
Burosumab 1 mg/kg-1.42± 0.229
Change From Baseline Over Time in BPI Pain Interference Score Secondary · Baseline, Weeks 12, 24, 36, 48, 72, 96

Change from baseline to post-baseline visits in BPI pain interference score as recorded on the day of the study visit. The BPI evaluates the condition of all pain over the previous 24 hours. Two dimensions are measured: pain severity (worst, least, average, and now) and the impact of pain on functioning (pain interference with general activity, walking, work, mood, enjoyment of life, relations with others, and sleep). Pain interference in the last 24 hours is rated on a scale of 0 (does not interfere) to 10 (completely interferes). The GEE Estimates are from the GEE model which includes the c

Change at Week 12
GroupValue95% CI
Placebo-0.29± 0.215
Burosumab 1 mg/kg-0.51± 0.207
Change at Week 24
GroupValue95% CI
Placebo-0.28± 0.242
Burosumab 1 mg/kg-0.41± 0.207
Change at Week 36
GroupValue95% CI
Placebo-1.30± 0.260
Burosumab 1 mg/kg-0.79± 0.221
Change at Week 48
GroupValue95% CI
Placebo-1.28± 0.251
Burosumab 1 mg/kg-1.04± 0.235
Change at Week 72
GroupValue95% CI
Placebo-1.22± 0.247
Burosumab 1 mg/kg-1.24± 0.263
Change at Week 96
GroupValue95% CI
Placebo-1.08± 0.260
Burosumab 1 mg/kg-1.43± 0.234
Change From Baseline Over Time in WOMAC Stiffness Score Secondary · Baseline, Weeks 12, 24, 36, 48, 72, 96, 120, 144

The WOMAC is a 24-item participant-reported questionnaire with two domains, Stiffness (2 questions) and Physical Function (17 questions) over the previous 48 hours. The WOMAC is administered in a 5-point Likert-scale format using descriptors of none, mild, moderate, severe, and extreme corresponding to an ordinal scale of 0-4. Higher scores on the WOMAC indicate worse stiffness and functional limitations. Scores are normalized to a 0-100 metric where 0 was the best health state and 100 the worst. The GEE Estimates are from the GEE model which includes the change from baseline for WOMAC Stiffn

Change at Week 12
GroupValue95% CI
Placebo-1.24± 2.929
Burosumab 1 mg/kg-7.86± 3.622
Change at Week 24
GroupValue95% CI
Placebo0.20± 3.289
Burosumab 1 mg/kg-8.01± 2.968
Change at Week 36
GroupValue95% CI
Placebo-13.50± 3.422
Burosumab 1 mg/kg-12.58± 3.411
Change at Week 48
GroupValue95% CI
Placebo-15.83± 3.488
Burosumab 1 mg/kg-16.63± 3.302
Change at Week 72
GroupValue95% CI
Placebo-18.02± 3.613
Burosumab 1 mg/kg-15.47± 3.111
Change at Week 96
GroupValue95% CI
Placebo-17.67± 3.737
Burosumab 1 mg/kg-15.32± 3.577
Change at Week 120
GroupValue95% CI
Placebo-19.23± 3.404
Burosumab 1 mg/kg-20.57± 3.371
Change at Week 144
GroupValue95% CI
Placebo-30.64± 4.407
Burosumab 1 mg/kg-25.88± 4.501
Change From Baseline Over Time in WOMAC Physical Function Score Secondary · Baseline, Weeks 12, 24, 36, 48, 72, 96, 120, 144

The WOMAC is a 24-item participant-reported questionnaire with two domains, Stiffness (2 questions) and Physical Function (17 questions) over the previous 48 hours. The WOMAC is administered in a 5-point Likert-scale format using descriptors of none, mild, moderate, severe, and extreme corresponding to an ordinal scale of 0-4. Higher scores on the WOMAC indicate worse stiffness and functional limitations. Scores are normalized to a 0-100 metric where 0 was the best health state and 100 the worst. The GEE Estimates are from the GEE model which includes the change from baseline for WOMAC Stiffn

Change at Week 12
GroupValue95% CI
Placebo-1.40± 2.418
Burosumab 1 mg/kg-3.96± 1.787
Change at Week 24
GroupValue95% CI
Placebo1.14± 2.531
Burosumab 1 mg/kg-3.45± 2.193
Change at Week 36
GroupValue95% CI
Placebo-5.47± 2.694
Burosumab 1 mg/kg-7.14± 2.133
Change at Week 48
GroupValue95% CI
Placebo-7.15± 2.801
Burosumab 1 mg/kg-8.42± 2.057
Change at Week 72
GroupValue95% CI
Placebo-8.68± 2.835
Burosumab 1 mg/kg-8.66± 2.523
Change at Week 96
GroupValue95% CI
Placebo-8.41± 2.752
Burosumab 1 mg/kg-9.02± 2.270
Change at Week 120
GroupValue95% CI
Placebo-11.93± 2.685
Burosumab 1 mg/kg-11.98± 2.291
Change at Week 144
GroupValue95% CI
Placebo-19.49± 3.892
Burosumab 1 mg/kg-17.67± 4.061
Change From Baseline Over Time in BFI Worst Fatigue Score Secondary · Baseline, Weeks 12, 24, 36, 48, 72, 96

Change from baseline to post-baseline visits in Brief Fatigue Inventory Question 3 (Worst Fatigue in Past 24 Hours; BFI-Q3) as averaged from daily diary scores recorded over 1 week and the study visit score. The BFI is a self-reported questionnaire consisting of 9 items related to fatigue rated on a 0 to 10 numerical scale with a recall period of 24 hours. Two dimensions are measured: fatigue severity and the interference of fatigue on daily life (activity, mood, walking ability, work, relations with others, and enjoyment of life). Participants are asked to rate their worst fatigue over the pa

Change at Week 12
GroupValue95% CI
Placebo-0.53± 0.266
Burosumab 1 mg/kg-0.44± 0.261
Change at Week 24
GroupValue95% CI
Placebo-0.45± 0.298
Burosumab 1 mg/kg-0.65± 0.280
Change at Week 36
GroupValue95% CI
Placebo-1.23± 0.305
Burosumab 1 mg/kg-0.90± 0.271
Change at Week 48
GroupValue95% CI
Placebo-1.21± 0.317
Burosumab 1 mg/kg-0.99± 0.295
Change at Week 72
GroupValue95% CI
Placebo-0.79± 0.352
Burosumab 1 mg/kg-0.58± 0.309
Change at Week 96
GroupValue95% CI
Placebo-0.82± 0.362
Burosumab 1 mg/kg-0.75± 0.306
Change From Baseline Over Time in BFI Global Fatigue Score Secondary · Baseline, Weeks 12, 24, 36, 48, 72, 96

Change from baseline to post-baseline visits in BFI global fatigue score, calculated by averaging all 9 BFI items as recorded on the day of the study visit. The BFI is a self-reported questionnaire consisting of 9 items related to fatigue that are rated on a numerical scale with a recall period of 24 hours. Two dimensions are measured: fatigue severity and the interference of fatigue on daily life (activity, mood, walking ability, work, relations with others, and enjoyment of life). BFI Global Fatigue score was calculated by averaging all 9 items on the BFI. Global scores range from 0 to 10, w

Change at Week 12
GroupValue95% CI
Placebo-0.14± 0.262
Burosumab 1 mg/kg-0.18± 0.261
Change at Week 24
GroupValue95% CI
Placebo-0.08± 0.292
Burosumab 1 mg/kg0.05± 0.261
Change at Week 36
GroupValue95% CI
Placebo-0.69± 0.315
Burosumab 1 mg/kg-0.54± 0.283
Change at Week 48
GroupValue95% CI
Placebo-0.75± 0.303
Burosumab 1 mg/kg-0.45± 0.275
Change at Week 72
GroupValue95% CI
Placebo-0.72± 0.304
Burosumab 1 mg/kg-0.78± 0.266
Change at Week 96
GroupValue95% CI
Placebo-0.86± 0.291
Burosumab 1 mg/kg-0.80± 0.285
Change From Baseline Over Time in Biochemical Marker of Bone Remodeling Procollagen Type 1 N-Propeptide (P1NP) Secondary · Baseline, Weeks 12, 24, 36, 48, 72, 96
Change at Week 12
GroupValue95% CI
Placebo-1.86± 5.958
Burosumab 1 mg/kg96.22± 14.264
Change at Week 24
GroupValue95% CI
Placebo2.95± 6.423
Burosumab 1 mg/kg63.50± 7.239
Change at Week 36
GroupValue95% CI
Placebo100.00± 10.562
Burosumab 1 mg/kg49.71± 6.786
Change at Week 48
GroupValue95% CI
Placebo85.12± 11.037
Burosumab 1 mg/kg40.07± 7.292
Change at Week 72
GroupValue95% CI
Placebo48.98± 7.286
Burosumab 1 mg/kg18.04± 9.186
Change at Week 96
GroupValue95% CI
Placebo22.98± 7.075
Burosumab 1 mg/kg12.48± 8.661

Adverse events — posted to ClinicalTrials.gov

Time frame: From first dose of study drug through the end of study plus 4 weeks (+ 5 days). Mean (SE) duration of exposure to burosumab for all periods combined through EOS II was 771.3 (21.97) days (range: 167 - 957) in the burosumab->burosumab group and 625.7 (19.40) days (range: 165 - 844) in the placebo->burosumab group.. Reporting threshold: 5%. Adverse-event reports describe events observed during the trial — not all are caused by the drug.

Placebo (DB Period)
Serious: 1/66 (2%)
Deaths: 0/66
Placebo -> Burosumab (OL Period)
Serious: 10/66 (15%)
Deaths: 0/66
Burosumab -> Burosumab (Combined DB and OL Period)
Serious: 12/68 (18%)
Deaths: 1/68
Total Burosumab (Combined DB and OL Period)
Serious: 22/134 (16%)
Deaths: 1/134

Serious adverse events (35 terms)

ReactionSystemPlacebo (DB Period)Placebo -> Burosumab (OL P…Burosumab -> Burosumab (Co…Total Burosumab (Combined …
ArthralgiaMusculoskeletal and connective tissue disorders
MyelopathyNervous system disorders
PalpitationsCardiac disorders
ColitisGastrointestinal disorders
Duodenal UlcerGastrointestinal disorders
IleusGastrointestinal disorders
Irritable Bowel SyndromeGastrointestinal disorders
Periodontal DiseaseGastrointestinal disorders
Peritoneal AdhesionsGastrointestinal disorders
CholelithiasisHepatobiliary disorders
GastroenteritisInfections and infestations
Medical Device Site InfectionInfections and infestations
OverdoseInjury, poisoning and procedural complications
Procedural NauseaInjury, poisoning and procedural complications
Procedural VomitingInjury, poisoning and procedural complications
Road Traffic AccidentInjury, poisoning and procedural complications
Subdural HaematomaInjury, poisoning and procedural complications
Back PainMusculoskeletal and connective tissue disorders
Cervical Spinal StenosisMusculoskeletal and connective tissue disorders
Joint Range Of Motion DecreasedMusculoskeletal and connective tissue disorders
Knee DeformityMusculoskeletal and connective tissue disorders
Musculoskeletal PainMusculoskeletal and connective tissue disorders
OsteoarthritisMusculoskeletal and connective tissue disorders
PseudarthrosisMusculoskeletal and connective tissue disorders
Spinal Column StenosisMusculoskeletal and connective tissue disorders
Other adverse events (72 terms — click to expand)

ReactionSystemPlacebo (DB Period)Placebo -> Burosumab (OL P…Burosumab -> Burosumab (Co…Total Burosumab (Combined …
NasopharyngitisInfections and infestations
ArthralgiaMusculoskeletal and connective tissue disorders
HeadacheNervous system disorders
Back PainMusculoskeletal and connective tissue disorders
FatigueGeneral disorders
Pain In ExtremityMusculoskeletal and connective tissue disorders
Tooth AbscessInfections and infestations
ToothacheGastrointestinal disorders
Vitamin D DeficiencyMetabolism and nutrition disorders
Musculoskeletal PainMusculoskeletal and connective tissue disorders
PainGeneral disorders
Restless Legs SyndromeNervous system disorders
CoughRespiratory, thoracic and mediastinal disorders
Muscle SpasmsMusculoskeletal and connective tissue disorders
DiarrhoeaGastrointestinal disorders
Vitamin D DecreasedInvestigations
NauseaGastrointestinal disorders
DizzinessNervous system disorders
Injection Site ReactionGeneral disorders
InfluenzaInfections and infestations
Procedural PainInjury, poisoning and procedural complications
InsomniaPsychiatric disorders
ConstipationGastrointestinal disorders
Upper Respiratory Tract InfectionInfections and infestations
Bone PainMusculoskeletal and connective tissue disorders
FallInjury, poisoning and procedural complications
MyalgiaMusculoskeletal and connective tissue disorders
HypertensionVascular disorders
Injection Site ErythemaGeneral disorders
Joint SwellingMusculoskeletal and connective tissue disorders
DepressionPsychiatric disorders
Oropharyngeal PainRespiratory, thoracic and mediastinal disorders
Injection Site PruritusGeneral disorders
Seasonal AllergyImmune system disorders
Urinary Tract InfectionInfections and infestations
VomitingGastrointestinal disorders
BronchitisInfections and infestations
HypoaesthesiaNervous system disorders
Nasal CongestionRespiratory, thoracic and mediastinal disorders
Abdominal Pain UpperGastrointestinal disorders

Most-reported serious reactions: Arthralgia, Myelopathy, Palpitations, Colitis, Duodenal Ulcer, Ileus, Irritable Bowel Syndrome, Periodontal Disease.

Data from ClinicalTrials.gov NCT02526160 adverse events section.

Sponsor's own description

The primary efficacy objective of this study is to establish the effect of burosumab treatment compared with placebo on increasing serum phosphorus levels in adults with XLH.

Publications & conference data

8 peer-reviewed publications reference this trial (live from Europe PMC):

  1. FGF23 and its role in X-linked hypophosphatemia-related morbidity.
    Beck-Nielsen SS, Mughal Z, Haffner D, Nilsson O, et al · · 2019 · cited 199× · PMID 30808384 · DOI 10.1186/s13023-019-1014-8
  2. Antibodies to watch in 2018.
    Kaplon H, Reichert JM. · · 2018 · cited 179× · PMID 29300693 · DOI 10.1080/19420862.2018.1415671
  3. Outcome of adult patients with X-linked hypophosphatemia caused by PHEX gene mutations.
    Chesher D, Oddy M, Darbar U, Sayal P, et al · · 2018 · cited 97× · PMID 29460029 · DOI 10.1007/s10545-018-0147-6
  4. Burosumab Improved Histomorphometric Measures of Osteomalacia in Adults with X-Linked Hypophosphatemia: A Phase 3, Single-Arm, International Trial.
    Insogna KL, Rauch F, Kamenický P, Ito N, et al · · 2019 · cited 95× · PMID 31369697 · DOI 10.1002/jbmr.3843
  5. Burosumab treatment in adults with X-linked hypophosphataemia: 96-week patient-reported outcomes and ambulatory function from a randomised phase 3 trial and open-label extension.
    Briot K, Portale AA, Brandi ML, Carpenter TO, et al · · 2021 · cited 54× · PMID 34548383 · DOI 10.1136/rmdopen-2021-001714
  6. Musculoskeletal Features in Adults With X-linked Hypophosphatemia: An Analysis of Clinical Trial and Survey Data.
    Javaid MK, Ward L, Pinedo-Villanueva R, Rylands AJ, et al · · 2022 · cited 38× · PMID 34636401 · DOI 10.1210/clinem/dgab739
  7. Benefit of burosumab in adults with X-linked hypophosphataemia (XLH) is maintained with long-term treatment.
    Kamenicky P, Briot K, Brandi ML, Cohen-Solal M, et al · · 2023 · cited 28× · PMID 36854566 · DOI 10.1136/rmdopen-2022-002676
  8. Pharmacological management of X-linked hypophosphataemia.
    Imel EA, White KE. · · 2019 · cited 20× · PMID 30207609 · DOI 10.1111/bcp.13763

Verify or expand the search:

Other trials of burosumab

Trials testing the same drug.

Other recruiting trials for X-linked Hypophosphatemia

Currently open trials in the same condition.

Other Kyowa Kirin, Inc. trials

Trials by the same sponsor.

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