Section 4 of 6
Clinical evidence
159 evidence topics · 30 sources
Study summaries
ConfIdeS
Objective
Kidney function objective
Location and study date
Participating sites
Study design
ConfIdeS, NCT04935177: design
Randomization ratio
Eligibility criteria
Treatment
ConfIdeS, NCT04935177: control-arm treatments
Study outcomes
Rationale for using estimated glomerular filtration rate at 12 months as the primary endpoint
Validation of the primary endpoint as a surrogate for long-term clinical benefit
No evidence found.
Statistical analysis description
Number of participants (Planned and analyzed)
ConfIdeS, NCT04935177: randomized population
Description of analysis sets
No evidence found.
Results
Participant disposition
Baseline characteristics
No evidence found.
Efficacy results
ConfIdeS, NCT04935177: dialysis dependence
Health-related quality of life and patient-reported outcomes
No evidence found.
Safety results
ConfIdeS, NCT04935177: antibody-mediated rejection
Study limitations
Summary
ConfIdeS randomized 64 participants but was open label, and its control arm allowed several desensitization approaches or continued waiting. The comparison therefore does not isolate imlifidase against one standardized active regimen. The rejection counts use denominators of 28 and 13 rather than the complete randomized population, so they should not be interpreted as randomized-population rejection risks. The reported primary comparison concerns kidney function at 12 months, not a demonstrated long-term survival benefit.
Highdes
Objective
Desensitization objective
Location and study date
Recruitment start and participating countries
| Study characteristic | Quoted record |
|---|---|
| Recruitment start | “30 Sep 2016” |
| Participating country | “Sweden” |
| Participating country | “France” |
| Participating country | “United States” |
Study design
Eligibility criteria
Transplant donor eligibility
Treatment
Dosing groups
| Regimen | Dose |
|---|---|
| Single intravenous infusion | “0.25 mg/kg” |
| Two intravenous infusions | “2 x 0.25 mg/kg” |
Study outcomes
Rationale for using crossmatch conversion within 24 hours as the primary endpoint
Crossmatch conversion and access to transplantation
Statistical analysis description
Number of participants (Planned and analyzed)
Description of analysis sets
Registry analysis populations and statistical approach
| Analysis | Quoted record |
|---|---|
| Primary efficacy analysis set | “Full analysis” |
| Primary endpoint analysis population | “19” |
| Endpoint summaries | “descriptive statistics” |
Results
Participant disposition
Baseline characteristics
Median sensitization
| Baseline characteristic | Quoted value |
|---|---|
| Median calculated panel-reactive antibody | “99.83%” |
Efficacy results
Highdes, NCT02790437: crossmatch conversion
Long-term follow-up: survival
Health-related quality of life and patient-reported outcomes
No evidence found.
Safety results
Highdes, NCT02790437: antibody-mediated rejection
Long-term follow-up: antibody-mediated rejection
Study limitations
Summary
Highdes enrolled 19 participants without a randomized control group. Its primary endpoint was crossmatch conversion, which enables transplantation but does not alone establish long-term graft survival or freedom from rejection. The five-year single-site report concerns 8 participants from the same trial, not an additional independent trial population.
13-HMedIdeS-03
Objective
Primary study objective
Location and study date
Country and recruitment start
| Study characteristic | Quoted record |
|---|---|
| Country | “Sweden” |
| Recruitment start | “04 Jun 2015” |
Study design
Eligibility criteria
No evidence found.
Treatment
Intravenous dose groups
| Group | Dose |
|---|---|
| First dose group | “0.25 mg/kg” |
| Second dose group | “0.50 mg/kg” |
Study outcomes
Rationale for using safety parameters as the primary endpoint
Not applicable.
Statistical analysis description
Number of participants (Planned and analyzed)
Description of analysis sets
Statistical approach
Results
Participant disposition
Baseline characteristics
Efficacy results
Health-related quality of life and patient-reported outcomes
No evidence found.
Safety results
Study limitations
Summary
This unblinded study enrolled 10 participants in two dose groups of 5 and used descriptive analyses. It does not provide a randomized estimate of treatment effect. Its 52 and 54 adverse-event counts are numbers of events, not numbers of affected participants. The combined early-trial publication should not be added to this enrollment count as an independent population.
14-HMedIdeS-04
Objective
Protocol objective
Location and study date
Study design
Protocol study design
Eligibility criteria
Treatment
Protocol imlifidase dose
Post-transplant immunosuppression in the combined publication
Study outcomes
Rationale for using allograft rejection as the primary endpoint
Endpoint-specific validation
No evidence found.
Statistical analysis description
Number of participants (Planned and analyzed)
Protocol planned enrollment
| Population | Participants |
|---|---|
| Planned | “20” |
Sponsor-reported enrollment for NCT02426684
| Population | Participants |
|---|---|
| Enrolled | “17” |
United States participants in the combined publication
| Population | Participants |
|---|---|
| United States subgroup in the earlier publication | “14” |
Description of analysis sets
Protocol statistical limitation
Results
Participant disposition
No evidence found.
Baseline characteristics
No evidence found.
Efficacy results
HLA-incompatible transplantation: pooled donor-specific antibody reduction across the early studies
Health-related quality of life and patient-reported outcomes
No evidence found.
Safety results
Combined early-trial safety results: pooled, not specific to the United States study
Study limitations
Summary
The protocol describes an exploratory open-label study that was not powered for efficacy endpoints. Planned enrollment was 20 participants, and the later sponsor update reported 17. The earlier combined publication included 14 United States participants and reported several outcomes across 25 participants from both countries. Those pooled efficacy and safety counts must not be treated as outcomes for all 17 participants in this study alone.
20-HMedIdeS-19
Objective
Post-authorization efficacy objective
Location and study date
Recruitment and geographic coverage
| Study characteristic | Quoted record |
|---|---|
| First participant enrolled | “May 2022” |
| Participating transplant centers | “22” |
| Participating countries | “11” |
Study design
Reference-group design
Eligibility criteria
Treatment
Pretreatment before transplantation
Study outcomes
Rationale for using graft failure-free survival at one year as the primary endpoint
Validation against a randomized comparator
No evidence found.
Statistical analysis description
Number of participants (Planned and analyzed)
European post-authorization efficacy study: enrollment
Description of analysis sets
Analysis sets in the sponsor presentation
| Population | Imlifidase | Concurrent reference |
|---|---|---|
| Safety analysis set | “51 (100)” | “63 (100)” |
| Intention-to-treat analysis set | “50 (98.0)” | “63 (100)” |
Results
Participant disposition
Trial completion in the sponsor presentation
| Disposition | Imlifidase | Concurrent reference |
|---|---|---|
| Completed trial | “48 (94.1)” | “57 (90.5)” |
Baseline characteristics
Efficacy results
European post-authorization efficacy study: one-year outcomes
One-year kidney function in the results announcement
| Outcome | Quoted value |
|---|---|
| Mean eGFR, mL/min/1.73 m² | “52.4” |
Health-related quality of life and patient-reported outcomes
No evidence found.
Safety results
Serious treatment-emergent adverse events in the sponsor presentation
| Population | Participants |
|---|---|
| Imlifidase safety population with serious treatment-emergent adverse events | “28 (54.9)” |
Study limitations
Summary
The presentation distinguishes a safety population of 51 imlifidase-treated participants from an intention-to-treat population of 50. Its concurrent reference cohort is explicitly non-comparative, so the reported outcomes do not constitute a randomized comparative-effectiveness estimate. Forty-eight imlifidase-treated participants completed the trial. The one-year results do not resolve longer-term graft outcomes.
17-HMedIdeS-14
Objective
Location and study date
Parent-trial treatment period
Study design
Eligibility criteria
Analysis eligibility
Treatment
No evidence found.
Study outcomes
Rationale for using long-term graft survival as the primary endpoint
Kidney function assessment
Surrogate endpoint justification for survival outcomes
Not applicable.
Statistical analysis description
Number of participants (Planned and analyzed)
Five-year follow-up extension, NCT03611621: population
Description of analysis sets
Results
Participant disposition
Five-year assessment population
| Population | Participants |
|---|---|
| Functioning grafts with reported five-year eGFR | “24” |
Baseline characteristics
Baseline sensitization
| Characteristic | Quoted value |
|---|---|
| Median cPRA | “99.62%” |
Efficacy results
Five-year follow-up extension, NCT03611621: patient and graft survival
Health-related quality of life and patient-reported outcomes
No evidence found.
Safety results
Five-year follow-up extension, NCT03611621: late antibody-mediated rejection
Study limitations
Summary
This non-interventional follow-up analysis includes 39 crossmatch-positive participants from earlier trials. It is not a new randomized treatment comparison. Five-year kidney-function estimates were available for 24 functioning grafts, so these estimates are conditional on graft function and available follow-up rather than representing all original participants. The three-year, five-year, and correspondence publications concern overlapping follow-up evidence and should not be counted as separate trial populations.
High-strength donor-specific antibody single-center cohort
Objective
Transplantation objective
Location and study date
No evidence found.
Study design
Single-center experience
Eligibility criteria
Treatment
Timing of IdeS administration
Study outcomes
Rationale for using crossmatch conversion as the primary endpoint
Not applicable.
Statistical analysis description
Number of participants (Planned and analyzed)
Reported cohort
| Population | Participants |
|---|---|
| Transplant candidates | “7” |
Description of analysis sets
No evidence found.
Results
Participant disposition
No evidence found.
Baseline characteristics
Baseline sensitization and donor type
| Characteristic | Quoted value |
|---|---|
| Calculated panel-reactive antibody range | “cPRA98-100%” |
| Deceased donors | “5” |
| Living donors | “2” |
Efficacy results
High-strength donor-specific antibody: allograft function
Health-related quality of life and patient-reported outcomes
No evidence found.
Safety results
High-strength donor-specific antibody: DSA rebound and rejection
Serious adverse events attributed to IdeS
Study limitations
Summary
This single-center report describes 7 participants, including 5 deceased-donor and 2 living-donor transplant recipients. All had functioning grafts at a median follow-up of 235 days, but 3 experienced antibody rebound and antibody-mediated rejection. The small series does not provide a randomized comparator. Its participants should not be assumed to be independent of other trial or follow-up publications without confirmation of participant overlap.
Positive-crossmatch deceased-donor real-world cohort
Objective
Clinical-practice study objective
Location and study date
Minimum observation period
Study design
Initial clinical-practice cohort
Eligibility criteria
Crossmatch eligibility
Treatment
Study outcomes
Rationale for using crossmatch conversion as the primary endpoint
Not applicable.
Statistical analysis description
Number of participants (Planned and analyzed)
Reported cohort size
| Population | Participants |
|---|---|
| Transplanted cohort | “9” |
Description of analysis sets
No evidence found.
Results
Participant disposition
No evidence found.
Baseline characteristics
Efficacy results
Positive crossmatch against a deceased donor: crossmatch conversion
Health-related quality of life and patient-reported outcomes
No evidence found.
Safety results
Positive crossmatch against a deceased donor: graft loss, death, and infections
Study limitations
Summary
This clinical-practice cohort comprised 9 transplanted participants with at least 3 months of follow-up. The mean reported follow-up was 7 months. Crossmatch conversion occurred after one imlifidase injection, but 4 participants developed at least one infection. The small cohort and short follow-up do not establish comparative effectiveness or long-term graft survival.
DINKY
Objective
Pediatric treatment objective
Location and study date
Planned United Kingdom site
Study design
Eligibility criteria
Age eligibility
Treatment
Timing of imlifidase treatment
Study outcomes
Rationale for using crossmatch conversion as the primary endpoint
Crossmatch conversion rationale
Statistical analysis description
Number of participants (Planned and analyzed)
Planned enrollment in the research summary
| Population | Participants |
|---|---|
| Planned | “10” |
Description of analysis sets
No evidence found.
Results
Participant disposition
No evidence found.
Baseline characteristics
No evidence found.
Efficacy results
No evidence found.
Health-related quality of life and patient-reported outcomes
No evidence found.
Safety results
No evidence found.
Study limitations
Summary
The research summary describes a single-arm pediatric trial with planned enrollment of 10 participants aged 1 to 17 years. This design does not provide a randomized comparator. No study results are included in this report, so the planned study cannot establish pediatric efficacy or safety here.
Lupus nephritis retransplantation case report
Objective
Immunoglobulin monitoring
Location and study date
No evidence found.
Study design
Eligibility criteria
Not applicable.
Treatment
Treatment before retransplantation
Study outcomes
Rationale for using donor-specific antibody reduction as the primary endpoint
Not applicable.
Statistical analysis description
Number of participants (Planned and analyzed)
Description of analysis sets
Not applicable.
Results
Participant disposition
No evidence found.
Baseline characteristics
Baseline features
| Characteristic | Quoted record |
|---|---|
| Underlying kidney disease | “lupus nephritis” |
| Sensitization | “cPRA>99 %” |
Efficacy results
Maximum reported total IgG depletion at 36 hours
| Outcome | Quoted value |
|---|---|
| Total IgG reduction from baseline | “-75 %” |
Health-related quality of life and patient-reported outcomes
No evidence found.
Safety results
No evidence found.
Study limitations
Summary
The report concerns one 51-year-old woman with lupus nephritis undergoing retransplantation. The absence of donor-specific antibody rebound at six months is an individual observation, not an estimate of response probability. The case does not establish comparative efficacy or safety in other highly sensitized transplant candidates.
Desensitization with Imlifidase case report
Objective
No evidence found.
Location and study date
No evidence found.
Study design
No evidence found.
Eligibility criteria
No evidence found.
Treatment
No evidence found.
Study outcomes
Rationale for using clinical transplant outcomes as the primary endpoint
Not applicable.
Statistical analysis description
Number of participants (Planned and analyzed)
No evidence found.
Description of analysis sets
No evidence found.
Results
Participant disposition
No evidence found.
Baseline characteristics
No evidence found.
Efficacy results
Health-related quality of life and patient-reported outcomes
No evidence found.
Safety results
No evidence found.
Study limitations
No evidence found.
Anti-MICA antibody case report
Objective
Antibody monitoring objective
Location and study date
No evidence found.
Study design
Individual recipient report
Eligibility criteria
Not applicable.
Treatment
Treatment used after rejection
Study outcomes
Rationale for using Anti-MICA antibody reduction as the primary endpoint
Not applicable.
Statistical analysis description
Number of participants (Planned and analyzed)
Reported participant
Description of analysis sets
Not applicable.
Results
Participant disposition
No evidence found.
Baseline characteristics
Baseline donor-specific antibodies
Efficacy results
Health-related quality of life and patient-reported outcomes
No evidence found.
Safety results
Study limitations
Summary
This report describes one recipient with preformed anti-MICA donor-specific antibodies. Antibody rebound occurred after 14 days, and early antibody-mediated rejection was reported. Later antibody removal followed immunoadsorption and daratumumab, so that outcome cannot be attributed to imlifidase alone.
Molecular diagnosis of early alloimmune injury case report
Objective
No evidence found.
Location and study date
No evidence found.
Study design
No evidence found.
Eligibility criteria
No evidence found.
Treatment
No evidence found.
Study outcomes
Rationale for using molecular assessment of alloimmune injury as the primary endpoint
Not applicable.
Statistical analysis description
Number of participants (Planned and analyzed)
No evidence found.
Description of analysis sets
No evidence found.
Results
Participant disposition
No evidence found.
Baseline characteristics
No evidence found.
Efficacy results
Health-related quality of life and patient-reported outcomes
No evidence found.
Safety results
No evidence found.
Study limitations
No evidence found.
Pediatric compassionate-use case report
Objective
No evidence found.
Location and study date
No evidence found.
Study design
No evidence found.
Eligibility criteria
No evidence found.
Treatment
No evidence found.
Study outcomes
Rationale for using clinical transplant outcomes as the primary endpoint
Not applicable.
Statistical analysis description
Number of participants (Planned and analyzed)
No evidence found.
Description of analysis sets
No evidence found.
Results
Participant disposition
No evidence found.
Baseline characteristics
No evidence found.
Efficacy results
Health-related quality of life and patient-reported outcomes
No evidence found.
Safety results
No evidence found.
Study limitations
No evidence found.
NCT03897205
Objective
Trial indication
Location and study date
Multinational trial sites
| Characteristic | Quoted count |
|---|---|
| Transplant centers | “14” |
Study design
Eligibility criteria
Treatment
Randomized treatments
| Arm | Quoted treatment |
|---|---|
| Enzyme therapy | “imlifidase” |
| Active comparator | “PLEX” |
Study outcomes
Rationale for using donor-specific antibody reduction within five days as the primary endpoint
Statistical analysis description
Number of participants (Planned and analyzed)
Randomized population
| Population | Participants |
|---|---|
| Randomized | “Thirty” |
Description of analysis sets
Primary-endpoint analysis model
Results
Participant disposition
No evidence found.
Baseline characteristics
No evidence found.
Efficacy results
Post-transplant antibody-mediated rejection treatment, not pretransplant desensitization
Health-related quality of life and patient-reported outcomes
No evidence found.
Safety results
Study limitations
Summary
This randomized study addressed treatment of established antibody-mediated rejection after transplantation, not pretransplant desensitization. Thirty participants were randomized, and the trial was open label. Greater donor-specific antibody reduction with imlifidase did not establish clinical benefit; four graft losses occurred in the imlifidase arm and one in the plasma-exchange arm. These findings should not be pooled as direct evidence for the pretransplant indication.
13-HMedIdeS-02
Objective
Location and study date
No evidence found.
Study design
Eligibility criteria
Kidney disease population
Treatment
Dose levels
| Dose level | Quoted dose |
|---|---|
| Lower dose per infusion | “0.12 mg/kg” |
| Higher dose per infusion | “0.25 mg/kg” |
Study outcomes
Rationale for using safety and tolerability as the primary endpoint
Not applicable.
Statistical analysis description
Number of participants (Planned and analyzed)
Enrolled population
Description of analysis sets
Results
Participant disposition
No evidence found.
Baseline characteristics
Baseline sensitization
| Characteristic | Quoted value |
|---|---|
| Median cytotoxic panel-reactive antibody | “64%” |
Efficacy results
Pharmacodynamics: NCT02224820
Health-related quality of life and patient-reported outcomes
No evidence found.
Safety results
Study limitations
Summary
This single-center, open-label ascending-dose study enrolled 8 participants with chronic kidney disease. It establishes pharmacodynamic and immunogenicity observations in a small population, not a randomized estimate of transplantation benefit or long-term safety. IgG depletion within 48 hours and anti-IdeS antibody development are distinct outcomes and should not be equated with sustained clinical benefit.
11-HMedIdeS-01
Objective
First-in-human objective
Location and study date
Study design
Allocation and masking
Eligibility criteria
Healthy-volunteer population
Treatment
Phase 1 study in healthy subjects: NCT01802697
Study outcomes
Rationale for using safety and tolerability as the primary endpoint
Not applicable.
Statistical analysis description
Number of participants (Planned and analyzed)
Description of analysis sets
Results
Participant disposition
No evidence found.
Baseline characteristics
No evidence found.
Efficacy results
Phase 1 pharmacodynamic response
Health-related quality of life and patient-reported outcomes
No evidence found.
Safety results
Serious adverse events
Study limitations
Summary
The trial included 29 healthy male participants, with 20 receiving IdeS and 9 receiving placebo. No formal power calculation was performed. Although the study reported no serious adverse events, its small healthy-volunteer population does not establish safety or efficacy in highly sensitized kidney transplant candidates receiving concomitant immunosuppression.