Observational study of placebo effect for a variable factor between individuals-reactive character mediated serotonin transporter genotype

Observational study of placebo effect for a variable factor between individuals-reactive character mediated serotonin transporter genotype - placebo effect for a variable factor between individuals

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

JPRN

Registry ID

JPRN-UMIN000022301

Enrollment

Registered

2017-08-31

Start date

2014-04-01

Completion date

Unknown

Last updated

2026-06-29

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

Conditions

Hearthy volunteers

Interventions

placebo drug (lactose) caffine

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: Participants who Candidates received a doctor's examination and physical examination(height, weight, temperature, and blood pressure)

Exclusion criteria

Exclusion criteria: Participants are selected by doctor

Design outcomes

Primary

Measure	Time frame
Finding of responders and non-responders for placebo effect by gene polymorphism of serotonine trasporter	—

Secondary

Measure	Time frame
Finding of cognitive indicator of placebo reaction by brain prefrontal cortex activity	—

Countries

Japan

Contacts

Public ContactMinae Isawa

Faculty of Pharmacy, Keio University Division of Pharmaceutics

isawa-mn@pha.keio.ac.jp03-5400-2660

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026