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PK and Safety of SI-722 in IC/BPS

A Randomized, Double-Blind, Placebo-Controlled, Single Ascending Dose Study to Evaluate the Pharmacokinetics, Safety, and Tolerability of SI-722 Intravesical Instillation in Interstitial Cystitis/Bladder Pain Syndrome Subjects

Status
Completed
Phases
Phase 1Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT04208087
Enrollment
33
Registered
2019-12-23
Start date
2020-03-30
Completion date
2021-01-12
Last updated
2023-12-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Bladder Pain Syndrome, Interstitial Cystitis

Keywords

Bladder, Intravesical Injection, Interstitial Cystitis

Brief summary

This study is designed randomized, double-blind, placebo-controlled trial in Interstitial Cystitis/Bladder Pain Syndrome patients.

Interventions

DRUGSI-722

SI-722 will be intravesically instilled.

DRUGPlacebo

Placebo will be intravesically instilled.

Sponsors

Seikagaku Corporation
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
SEQUENTIAL
Primary purpose
TREATMENT
Masking
QUADRUPLE (Subject, Caregiver, Investigator, Outcomes Assessor)

Eligibility

Sex/Gender
ALL
Age
18 Years to 80 Years
Healthy volunteers
No

Inclusion criteria

* Males or females, ≥18 and ≤80 years of age * A score of 19 or greater on the Bladder Pain/Interstitial Cystitis Symptom Score (BPIC-SS)

Exclusion criteria

* Urinary tract infection ≤30 days * Treatment with intravesical therapy ≤60 days * Treatment with any opioid therapy ≤7 days * History of bladder hydrodistension ≤3 months * Has cancer or a past history of any cancer ≤5 years * Body mass index (BMI) ≥40 kg/m2

Design outcomes

Primary

MeasureTime frameDescription
Maximum Plasma Concentration (Cmax) for SI-7224 weeksSI-722 concentrations in plasma were measured using collected blood samples, and plasma PK parameters for SI-722 were estimated.

Countries

United States

Participant flow

Participants by arm

ArmCount
Placebo
The participants received a single intravesical instillation of Placebo
8
Low Dose of SI-722
The participants received a single intravesical instillation of Low Dose of SI-722
6
Medium Dose of SI-722
The participants received a single intravesical instillation of Medium Dose of SI-722
6
Medium-high Dose of SI-722
The participants received a single intravesical instillation of Medium-high Dose of SI-722
6
High Dose of SI-722
The participants received a single intravesical instillation of High Dose of SI-722
7
Total33

Withdrawals & dropouts

PeriodReasonFG000FG001FG002FG003FG004
Overall StudyAdverse Event10000
Overall StudyOther00001
Overall StudyWithdrawal by Subject00100

Baseline characteristics

CharacteristicPlaceboLow Dose of SI-722Medium Dose of SI-722Medium-high Dose of SI-722High Dose of SI-722Total
Age, Continuous55.6 years
STANDARD_DEVIATION 16.15
41.8 years
STANDARD_DEVIATION 6.4
51.0 years
STANDARD_DEVIATION 14.91
54.0 years
STANDARD_DEVIATION 17.79
45.4 years
STANDARD_DEVIATION 11.47
49.8 years
STANDARD_DEVIATION 14.16
Body Mass Index27.13 kilograms/meter square
STANDARD_DEVIATION 5.79
32.52 kilograms/meter square
STANDARD_DEVIATION 4.37
26.20 kilograms/meter square
STANDARD_DEVIATION 3.23
23.63 kilograms/meter square
STANDARD_DEVIATION 3.39
28.59 kilograms/meter square
STANDARD_DEVIATION 6.01
27.61 kilograms/meter square
STANDARD_DEVIATION 5.35
Ethnicity (NIH/OMB)
Hispanic or Latino
2 Participants5 Participants3 Participants1 Participants1 Participants12 Participants
Ethnicity (NIH/OMB)
Not Hispanic or Latino
6 Participants1 Participants3 Participants5 Participants6 Participants21 Participants
Ethnicity (NIH/OMB)
Unknown or Not Reported
0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
American Indian or Alaska Native
0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
Asian
0 Participants0 Participants1 Participants0 Participants0 Participants1 Participants
Race (NIH/OMB)
Black or African American
2 Participants1 Participants0 Participants0 Participants2 Participants5 Participants
Race (NIH/OMB)
More than one race
0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
Unknown or Not Reported
0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
White
6 Participants5 Participants5 Participants6 Participants5 Participants27 Participants
Sex: Female, Male
Female
6 Participants3 Participants5 Participants4 Participants7 Participants25 Participants
Sex: Female, Male
Male
2 Participants3 Participants1 Participants2 Participants0 Participants8 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
EG002
affected / at risk
EG003
affected / at risk
EG004
affected / at risk
deaths
Total, all-cause mortality
0 / 80 / 60 / 60 / 60 / 6
other
Total, other adverse events
4 / 81 / 61 / 63 / 63 / 6
serious
Total, serious adverse events
0 / 80 / 60 / 60 / 60 / 6

Outcome results

Primary

Maximum Plasma Concentration (Cmax) for SI-722

SI-722 concentrations in plasma were measured using collected blood samples, and plasma PK parameters for SI-722 were estimated.

Time frame: 4 weeks

Population: The PK Population is defined as all subjects who received SI-722 and who provided at least 1 evaluable PK sample. One participant in the High Dose group was excluded from PK population because the subject discontinued before IP administration due to difficulty with drawing blood.

ArmMeasureValue (MEAN)
Low Dose of SI-722Maximum Plasma Concentration (Cmax) for SI-722NA ng/mL
Medium Dose of SI-722Maximum Plasma Concentration (Cmax) for SI-722NA ng/mL
Medium-high Dose of SI-722Maximum Plasma Concentration (Cmax) for SI-722NA ng/mL
High Dose of SI-722Maximum Plasma Concentration (Cmax) for SI-722NA ng/mL

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026