A Phase 1 interventional study of KAI-4729 in Overweight or Obesity, sponsored by Kailera. Not yet recruiting at 1 site in United States. Open to participants aged 18 Years to 55 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2026-11-09.
Sponsored by Kailera · Phase 1, Interventional, and Basic science
The main objectives of this study are to assess the relative bioavailability of KAI-4729 subcutaneous (SC) injection in the upper arm and thigh compared with the abdomen and to measure the pharmacokinetics of KAI-4729 in plasma following a single SC dose in healthy non-Asian and Asian participants.
11,522 studies on the registry are indexed under Obesity; 2,033 are open to participants now.
This study's planned enrollment of 60 is below the median of 67 across 9,006 interventional studies indexed under Obesity.
Browse Obesity studies →Kailera is the lead sponsor of 9 studies on the registry; 2 are open to participants now.
Compared within Obesity, this study's primary condition as ClinicalTrials.gg classifies it; the registry's first condition term is Overweight. The counts are of registry records indexed under each term, refreshed daily. How we classify →
Key Inclusion Criteria:
Key Exclusion Criteria:
Note: Additional inclusion/exclusion criteria may apply, per protocol.
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.
Weight in kilograms divided by height in metres squared. Example: 70 kg and 1.75 m gives 70 ÷ (1.75 × 1.75) ≈ 22.9.
What counts as overweight or obesity differs between countries (some use lower cut-offs), so go by the range the study states.
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.
A blood test of average blood sugar over the past two to three months, given as a percentage or in mmol/mol. 6.5% (48 mmol/mol) or more is the usual threshold for diabetes, normally confirmed by a second test.
The human immunodeficiency virus, which weakens the immune system.
Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.
Hepatitis B is a virus that infects the liver. These are separate tests: HBsAg positive usually means a current infection (a recent vaccination can briefly cause it too); total anti-HBc (HBcAb) positive means an infection now or in the past; HBV DNA measures how much virus is in the blood.
Some studies accept a past infection if HBV DNA is undetectable, sometimes with antiviral medicine during the study. Check what this study allows.
Hepatitis C is a virus that infects the liver. An HCV antibody test can stay positive after an infection has cleared (and is occasionally positive without one); an HCV RNA test shows whether the virus is there now.
After treatment, hepatitis C counts as cured when HCV RNA is still undetectable 12 weeks or more after the treatment ended. Studies often accept people cured this way.
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Judged by the study doctor to matter for your health or for the study. It is a doctor’s decision, so ask the study team if you are unsure whether something counts.
An allergy, or another reaction of the immune system, to a substance. “Hypersensitivity to the study drug” means a known allergic reaction to it — not every side effect a medicine can have.
BMI (body mass index)
Weight in kilograms divided by height in metres squared. Example: 70 kg and 1.75 m gives 70 ÷ (1.75 × 1.75) ≈ 22.9.
What counts as overweight or obesity differs between countries (some use lower cut-offs), so go by the range the study states.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
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.
HbA1c
A blood test of average blood sugar over the past two to three months, given as a percentage or in mmol/mol. 6.5% (48 mmol/mol) or more is the usual threshold for diabetes, normally confirmed by a second test.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
HIV
The human immunodeficiency virus, which weakens the immune system.
Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Hepatitis B tests
Hepatitis B is a virus that infects the liver. These are separate tests: HBsAg positive usually means a current infection (a recent vaccination can briefly cause it too); total anti-HBc (HBcAb) positive means an infection now or in the past; HBV DNA measures how much virus is in the blood.
Some studies accept a past infection if HBV DNA is undetectable, sometimes with antiviral medicine during the study. Check what this study allows.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Hepatitis C tests
Hepatitis C is a virus that infects the liver. An HCV antibody test can stay positive after an infection has cleared (and is occasionally positive without one); an HCV RNA test shows whether the virus is there now.
After treatment, hepatitis C counts as cured when HCV RNA is still undetectable 12 weeks or more after the treatment ended. Studies often accept people cured this way.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Informed consent
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Clinically significant
Judged by the study doctor to matter for your health or for the study. It is a doctor’s decision, so ask the study team if you are unsure whether something counts.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Hypersensitivity
An allergy, or another reaction of the immune system, to a substance. “Hypersensitivity to the study drug” means a known allergic reaction to it — not every side effect a medicine can have.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Participants will receive KAI-4729 as a single SC injection into the upper arm on Day 1 of either Treatment Period 1, 2, or 3.
Drug: KAI-4729
Participants will receive KAI-4729 as a single SC injection into the abdomen on Day 1 of either Treatment Period 1, 2, or 3.
Drug: KAI-4729
Participants will receive KAI-4729 as a single SC injection into the thigh on Day 1 of either Treatment Period 1, 2, or 3.
Drug: KAI-4729
Asian participants will receive KAI-4729 as a single SC injection into the abdomen on Day 1 of Treatment Period 1.
Drug: KAI-4729
SC injection
Maximum Observed Plasma Concentration (Cmax) of KAI-4729 in the Upper Arm and Thigh Compared to the Abdomen
Time frame: Treatment Period 1, 2 and 3: Pre-dose and up to 29 days post-dose
Area Under the Concentration-time Curve From Time 0 to Time of Last Quantifiable Concentration (AUC0-t) of KAI-4729 in the Upper Arm and Thigh Compared to the Abdomen
Time frame: Treatment Period 1, 2 and 3: Pre-dose and up to 29 days post-dose
Area Under the Concentration-time Curve From Time 0 to Infinity (AUC0-inf) of KAI-4729 in the Upper Arm and Thigh Compared to the Abdomen
Time frame: Treatment Period 1, 2 and 3: Pre-dose and up to 29 days post-dose
Cmax of KAI-4729 in Healthy Non-Asian and Asian Participants
Time frame: Treatment Period 1, 2 and 3: Pre-dose and up to 29 days post-dose; Treatment Period 1: Pre-dose and up to 29 days post-dose (Asian Participants)
AUC0-t of KAI-4729 in Healthy Non-Asian and Asian Participants
Time frame: Treatment Period 1, 2 and 3: Pre-dose and up to 29 days post-dose; Treatment Period 1: Pre-dose and up to 29 days post-dose (Asian Participants)
AUC0-inf of KAI-4729 in Healthy Non-Asian and Asian Participants
Time frame: Treatment Period 1, 2 and 3: Pre-dose and up to 29 days post-dose; Treatment Period 1: Pre-dose and up to 29 days post-dose (Asian Participants)
Number of Participants Who Experience a Treatment-emergent Adverse Event (TEAE)
Time frame: Day 1 to Day 99
Number of Participants Who Experience a Serious Adverse Event (SAE)
Time frame: Day 1 to Day 99
Number of Participants Who Experience Antidrug Antibodies (ADAs) to KAI-4729
Time frame: Treatment Period 1, 2 and 3: Day 1, Day 8, Day 29 post-dose
Plan to share: No
No publications or documents are linked to this record.
Start is estimated for Nov 2026; primary completion for Apr 2027, 5 months later.
Of 334 industry-sponsored phase 1 interventional studies under Obesity, half reached primary completion within 9 months of starting (the median), counting those still running; a quarter within 5 and three quarters within 15. This study's planned 5 months is below that.
Counting every sponsor, half of 439 studies reached it within 11 months; a quarter within 6 and three quarters within 24.
How these figures are worked out, and which studies are left out of them.
From the registry record's own update history. This site started tracking changes on Sep 25, 2026; for anything earlier, see the record history on ClinicalTrials.gov ↗
This study is not yet recruiting, as verified in Nov 2026. You cannot join it, but the record below documents what was studied.
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