A Phase 1 interventional study of Placebo and KRN23 in X-linked Hypophosphatemia, sponsored by Kyowa Kirin Co., Ltd.. Completed at 4 sites in United States. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2024-06-17.
Sponsored by Kyowa Kirin Co., Ltd. · Phase 1, Interventional, and Treatment
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Among 18 studies testing burosumab in Familial Hypophosphatemic Rickets — none open to participants now, none under way, none of them phase 3. burosumab · Familial Hypophosphatemic Rickets.
Among the 18 studies testing burosumab in Familial Hypophosphatemic Rickets, this one is the 5th largest by enrollment, is the only one that started in 2008, is one of 2 in phase 1, and was the 1st registered.
49 studies on the registry are indexed under Familial Hypophosphatemic Rickets; 8 are open to participants now.
Browse Familial Hypophosphatemic Rickets studies →None of the 18 studies testing burosumab in Familial Hypophosphatemic Rickets is open now. The open studies under Familial Hypophosphatemic Rickets, anywhere →
burosumab: first FDA approval 2018 (CRYSVITA), first EMA approval 2018. What it is approved for, and how studies give it, is on its page →
Of the 4 Familial Hypophosphatemic Rickets studies recruiting now, 2 set no upper age limit and 2 stop at 75 or younger; 3 take children under 18; 1 takes healthy volunteers.
This study: 18 Years and older · all sexes · no healthy volunteers.
The full table on the hub →This tab as a report to print or save as PDF → With an account.
18 studies; the count open now beside each. This study's row is marked.
A study in two phases is counted once above. Listed by phase, each with its combined phases: Phase 1 5 · Phase 2 6 · Phase 3 6 · Phase 4 4
First in 2008; this study’s year is marked. 1 started in 2008.
This study's enrollment of 42 is above the median of 28 across 29 interventional studies indexed under Familial Hypophosphatemic Rickets.
Median enrollment 26 across the 18 interventional studies. Of the 17 that completed or were terminated, 9 (53%) have results posted.
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15 of 18 have an industry lead sponsor. The 6 most frequent:
Kyowa Kirin Co., Ltd. is the lead sponsor of 159 studies on the registry; 8 are open to participants now.
21 studies in Familial Hypophosphatemic Rickets by Kyowa Kirin Co., Ltd.: 2 open now, 3 under way, none of them phase 3. Of 17 finished, 8 (47%) have results posted.
Among the 21 studies in Familial Hypophosphatemic Rickets by Kyowa Kirin Co., Ltd., this one is the 4th largest by enrollment of the 16 interventional ones that give a count, is the only one that started in 2008, is one of 2 in phase 1, and was the 1st registered.
Kyowa Kirin Co., Ltd.’s Familial Hypophosphatemic Rickets studies by the year they started, since 2008.
None of the studies under way reaches primary completion within a year.
Among the 18 studies testing burosumab in Familial Hypophosphatemic Rickets, from their registry updates:
Nothing recorded among them since 2026-09-25.
Among Kyowa Kirin Co., Ltd.’s 21 in Familial Hypophosphatemic Rickets:
This tab as a report to print or save as PDF → With an account.
The primary objective of this study is to assess the safety and tolerability of KRN23 after a single intravenous (IV) and subcutaneous (SC) administration in XLH patients.
Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
Exclusion Criteria:
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
GFR (glomerular filtration rate) is how much blood the kidneys filter each minute. It is usually estimated from a blood test — eGFR, by formulas such as CKD-EPI or MDRD — and some studies ask for it to be measured directly instead. Usually given in mL/min/1.73 m².
Check the method, the units and the minimum the study states. A value of 90 or above is in the normal-or-high range, but kidney damage can show in other tests too.
GFR and eGFR (kidney filtering)
GFR (glomerular filtration rate) is how much blood the kidneys filter each minute. It is usually estimated from a blood test — eGFR, by formulas such as CKD-EPI or MDRD — and some studies ask for it to be measured directly instead. Usually given in mL/min/1.73 m².
Check the method, the units and the minimum the study states. A value of 90 or above is in the normal-or-high range, but kidney damage can show in other tests too.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Single IV or SC administration on day 1
Drug: KRN23
Single IV or SC administration on day 1
Drug: Placebo
single dose IV or SC administration
Single IV administration on day 1: 0.003, 0.01, 0.03, 0.1 and 0.3 mg/kg and Single SC administration on day 1: 0.1, 0.3, 0.6 and 1.0 mg/kg
Safety and tolerability
AEs, etc
Time frame: Up to 7 weeks after dosing (maximally 11 weeks)
Effect to pharmacodynamic parameter
Change in Serum Phosphate
Time frame: Up to 7 weeks after dosing (maximally 11 weeks)
The record gives a start of Dec 2008, a primary completion of Dec 2011 and a completion of May 2013. It does not say whether these dates are actual or estimated.
How these figures are worked out, and which studies are left out of them.
This study is completed, as verified in Jun 2024. You cannot join it, but the record below documents what was studied.
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Studies of the drug tested here: Burosumab
Familial Hypophosphatemic Rickets →