Influence of meal intervention on clock gene expression and hormone in saliva

Influence of meal intervention on clock gene expression and hormone in saliva - Six consecutive days of meal intervention

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

JPRN

Registry ID

JPRN-UMIN000032346

Enrollment

Registered

2018-04-23

Start date

2015-07-15

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

healthy subjects

Interventions

6 days of meal intervention (3 meals) 6 days of meal intervention (breakfast skipping)

Eligibility

Sex/Gender

Male

Inclusion criteria

Inclusion criteria: Eating breakfast everyday and living a regular wake/sleep

Exclusion criteria

Exclusion criteria: Smoker, thyroid disease, diabetes

Design outcomes

Primary

Measure	Time frame
Energy metabolism at sixth day of meal intervention (energy expenditure, substrate oxidation, and respiratory quotient measured using metabolic chamber) Continuous blood level from first to sixth meal intervention Expression of clock gene in blood and saliva at sixth day of meal intervention Heart rate variability at sixth day of meal intervention Melatonin onset at sixth day of meal intervention	—

Secondary

Measure	Time frame
Body composition between first and last meal intervention	—

Countries

Japan

Contacts

Public ContactMakoto Satoh

University of Tsukuba International Institute for Integrative Sloop Medicine

mk-satoh@outlook.com029-853-5643

Outcome results

None listed

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