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Cardiovascular DiseasesPhase 2DEFINENCT03449251

A Series of Pilot Studies to Evaluate the haemoDynamic and mEtabolic Effects oF apelIn aNd rElaxin

A Phase 2 study testing Apelin, Relaxin and Normal saline in people with Cardiovascular Diseases and Type 2 Diabetes Mellitus, run by Cambridge University Hospitals NHS Foundation Trust at 1 site in United Kingdom.

Active, not recruiting

Under way, not looking for participants. Everyone needed has enrolled. The study is still running.

Official record
Search all trials

Trial summary

Type two diabetes mellitus (T2DM) is a common, long term metabolic disorder characterised by hyperglycaemia (high blood glucose) resulting from insulin resistance and relative insulin insufficiency. Read more about this study

Who is it for?
Ages 18 to 75 yearsHealthy volunteers can take part
What is being tested?
Apelin, Relaxin and Normal saline
Type of treatment
Injection or infusion
Could I receive a placebo?
No, everyone receives an active treatment
How many people
170 participants
Where
1 siteUnited Kingdom
Study dates
28 Mar 2018to Dec 2026
Phase
Phase 2
Are there results?
Not yet: the study is under way

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 to 75 years
  • All sexes
  • Healthy volunteers accepted
  • Adult, Older adult

Who may be able to join

  • Healthy participants
  • Have given written informed consent to participate
  • Aged 18 to 70 years inclusive
  • Male or female
  • Current non-smoker
  • If female, either postmenopausal or on days 2-9 of menstrual cycle and negative pregnancy test performed on the day of the of visit
Show all 23Show fewer
  • BMI in range for studies 1 and 4: 18.5-24.9 kg/m2 with waist circumference lower than 88 centimetres (35 inches) for women or 102 cm (40 inches) for men, and/or body fat level less than 32 % for women or 25% for men
  • BMI in range for studies 2 and 3: 18.5-30.0 kg/m2 without limitations in waist circumference or body fat level
  • Overweight/obese participants
  • Have given written informed consent to participate
  • Aged 18 to 70 years inclusive
  • Male or female
  • Current non-smoker
  • If female, either postmenopausal or on days 2-9 of menstrual cycle and negative pregnancy test performed on the day of the of visit
  • BMI in range of 25-34.9 kg/m2 (inclusive) with either waist circumference higher than 88cm (35 inches) for women or 102 cm (40 inches) for men, and/or body fat levels in excess of 32% for women or 25% for men
  • Participants with type 2 diabetes mellitus
  • Have given written informed consent to participate
  • Aged 18 to 70 years inclusive
  • Male or female
  • Current non-smoker
  • If female, either postmenopausal or on days 2-9 of menstrual cycle and negative pregnancy test performed on the day of the of visit
  • BMI in range of 25-34.9 kg/m2 (inclusive) with either waist circumference higher than 88cm (35 inches) for women or 102 cm (40 inches) for men, and/or body fat levels in excess of 32% for women or 25% for men
  • Documented diagnosis of Type 2 Diabetes Mellitus, either diet controlled or treated with oral hypoglycaemic therapy

Who cannot join

  • Hypersensitivity to any of the study drugs or excipients
  • Systemic Hypertension (sustained BP >160/100mmHg) or hypotension (systolic BP below 90 mmHg)
  • Known heart disease
  • Implanted heart pace-maker or implantable cardioverter defibrillator (ICD)
  • Known active malignancy
  • Known renal failure (creatinine >140µmol/L)
Show all 20Show fewer
  • Known neurological disease
  • History of Scleroderma (Study 4 only)
  • Current pregnancy, breast feeding
  • Use of vasoactive medications or NSAIDS/aspirin within 24 hours of study visits
  • Use of caffeine within 24 hours of study visits
  • Current involvement in the active treatment phase of other research studies, (excluding observations/non-interventional)
  • Second or third-degree AV block, sino-atrial block, sick sinus syndrome or sinus bradycardia
  • Known HIV, hepatitis B or C
  • Needle phobia
  • Participants treated with formal anticoagulant therapy such as, but not limited to, heparin, warfarin or clopidogrel
  • Diagnosis of Type 1 Diabetes Mellitus or current usage of insulin or other injectable drugs for the treatment of diabetes such as but not limited to GLP1 agonists
  • BMI <18.5
  • Aged <18 or >70 years
  • Any other clinical reason which may preclude entry in the opinion of the investigator

Trial locations and contacts

1 site in 1 country.

United Kingdom1 site
  • Addenbrooke's Hospital

    Cambridge, Cambridgeshire, CB20QQ

Other trials in United Kingdom

About this study

Official title: A Series of Pilot Studies to Evaluate the Haemodynamic and Metabolic Effects of Apelin and Relaxin in Healthy Humans, Subjects With Increased Weight and Patients With Type 2 Diabetes Mellitus

Type two diabetes mellitus (T2DM) is a common, long term metabolic disorder characterised by hyperglycaemia (high blood glucose) resulting from insulin resistance and relative insulin insufficiency. The risk of developing insulin resistance and subsequently T2DM is increased by being overweight and also through a sedentary lifestyle. As the onset can be gradual, physiological damage may have occurred prior to diagnosis. Diabetes is associated with the development of microvascular complications (diabetic nephropathy, neuropathy, and retinopathy), and macrovascular complications (coronary artery disease, peripheral arterial disease, and stroke). While there are many treatments available for T2DM, these complications may still arise, leading to significant morbidity and mortality. There is therefore an urgent need to identify novel signalling pathways that may contribute to the development of diabetes related complications. The identification of these pathways may ultimately lead to the development of new therapies targeting better blood glucose control and preventing these subsequent complications.

Both animal and human studies have indicated that two endogenous peptides, apelin and relaxin both act as vasodilators in the human cardiovascular system and could also have beneficial action in T2DM. Therefore, we aim to carry out experimental medicine studies to test this hypothesis, and explore the signalling pathway in the human vascular system.

Read the detailed description

An extensive body of evidence demonstrates a direct association between T2DM and cardiovascular complications and mortality. Unfortunately, current therapies for diabetes have failed to be translated into improvements in cardiovascular outcomes, highlighting an urgent need to develop novel therapeutic strategies that can ultimately achieve the dual outcome of improving glycaemic control and improving cardiovascular function.

While the precise cellular mechanisms involved remain to be elucidated, we hypothesise that the apelin and relaxin pathways meet these two criteria and therefore are potential therapeutic targets in conditions of abnormal glucose metabolism and heart failure.

Apelin and relaxin are safe for parenteral use as they are naturally occurring peptide hormones, have a short half-life and will be rapidly cleared. They target endogenous receptors and post-receptor signalling, and have been used in human trials without any significant side effects reported.

Being tested
Apelin, Relaxin, Normal saline, Verapamil, LN Monomethyl arginine
Keywords
Apelin, Relaxin
Medical subject headings
Cardiovascular Diseases, Diabetes Mellitus, Type 2

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • ApelinDrug

    Apelin is an endogenous peptide that activate a single G-protein couple receptor. Apelin inhibits insulin secretion, decreases glucose levels and increases insulin sensitivity.

  • RelaxinDrug

    Also called RLX

    Relaxin is RLN2 encoded endogenous peptide hormone, which binds to G protein coupled receptor RXFP1.

  • Normal salineDrug

    Also called Saline

    Vehicle

  • VerapamilDiagnostic test

    NO independent challenge agent

  • LN Monomethyl arginineDiagnostic test

    Also called LNMMA

    Basal NO synthase inhibitor

Study groups in NCT03449251
Study groupRoleWhat they receive
Substudy 1A - ApelinExperimentalIn sub-study 1A Healthy participants will receive systemic infusions of Apelin to establish a dose range
Receives: Drug: Apelin
Substudy 1B - Apelin/Normal SalineExperimentalIn sub-study 1B , individuals with Type 2 Diabetes and individuals with increase weight will receive systemic infusions of Apelin or Normal Saline
Receives: Drug: Apelin; Drug: Normal saline
Substudy 2A - Relaxin/Normal SalineExperimentalIn sub-study 2A Healthy participants will receive intra-arterial infusions of Relaxin
Receives: Drug: Relaxin; Drug: Normal saline
Substudy 2B - RelaxinExperimentalIn sub-study 2B Healthy participants will receive intra-arterial infusions of Relaxin followed by verapamil (on a background infusion of either LN Monomethyl Arginine or Normal Saline, to test effects on nitric oxide)
Receives: Drug: Relaxin; Diagnostic Test: Verapamil; Diagnostic Test: LN Monomethyl arginine
Substudy 3A - Relaxin with Apelin/SalineExperimentalIn sub-study 3A Healthy participants will receive intra-arterial infusions of Relaxin (background infusion apelin/Normal Saline)
Receives: Drug: Apelin; Drug: Relaxin; Drug: Normal saline
Substudy 3B - Apelin with Relaxin/SalineExperimentalIn sub-study 3B Healthy participants will receive intra-arterial infusions of Apelin (background infusion Relaxin/Normal Saline)
Receives: Drug: Apelin; Drug: Relaxin; Drug: Normal saline
Substudy 4 - Apelin and RelaxinExperimentalIn sub-study 4 Healthy participants, Individuals with Type 2 Diabetes and Individuals with increase weight will receive systemic infusions of Normal saline, Relaxin, Apelin and relaxin
Receives: Drug: Apelin; Drug: Relaxin
Substudy 5 - Relaxin/SalineExperimentalIn sub-study 5 Healthy participants will be allocated to 1 of 4 Relaxin dosing groups and will receive dorsal hand vein infusion of 3 incremental doses of Normal Saline/ D5W and Relaxin
Receives: Drug: Relaxin; Drug: Normal saline

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Sub-study 1a: Changes in markers of glucose homeostasis in healthy participants after infusion of apelin (Glucose)

    Glucose, in mmol/l

    Measured: Visit 2 to visit 4, over a period of up to 8 weeks

  2. Sub-study 1a: Changes in markers of glucose homeostasis in healthy participants after infusion of apelin (C-Peptide)

    C-peptide, in pmol/L

    Measured: Visit 2 to visit 4, over a period of up to 8 weeks

  3. Sub-study 1a: Changes in markers of glucose homeostasis in healthy participants after infusion of apelin (Glucagon)

    Glucagon, in pg/ml

    Measured: Visit 2 to visit 4, over a period of up to 8 weeks

  4. Sub-study 1a: Changes in markers of glucose homeostasis in healthy participants after infusion of apelin (Insulin)

    Insulin, in pmol/L

    Measured: Visit 2 to visit 4, over a period of up to 8 weeks

  5. Sub-study 1a: Changes in markers of glucose homeostasis in healthy participants after infusion of apelin (TNF-alpha)

    TNF-alpha, in pg/ml

    Measured: Visit 2 to visit 4, over a period of up to 8 weeks

  6. Sub-study 1b: Changes in markers of glucose homeostasis in participants with increased weight and participants with type 2 diabetes mellitus after infusion of apelin with or without mixed meal tolerance in obese/overweight and T2DM participants

    Glucose, in mmol/l

    Measured: Visit 2 to visit 5, over a period of up to 14 weeks

  7. Sub-study 1b: Changes in markers of glucose homeostasis in participants with increased weight and participants with type 2 diabetes mellitus after infusion of apelin with or without mixed meal tolerance in obese/overweight and T2DM participants

    C-peptide, in pmol/L

    Measured: Visit 2 to visit 5, over a period of up to 14 weeks

  8. Sub-study 1b: Changes in markers of glucose homeostasis in participants with increased weight and participants with type 2 diabetes mellitus after infusion of apelin with or without mixed meal tolerance in obese/overweight and T2DM participants

    Glucagon, in pg/ml

    Measured: Visit 2 to visit 5, over a period of up to 14 weeks

  9. Sub-study 1b: Changes in markers of glucose homeostasis in participants with increased weight and participants with type 2 diabetes mellitus after infusion of apelin with or without mixed meal tolerance in obese/overweight and T2DM participants

    Insulin, in pmol/L

    Measured: Visit 2 to visit 5, over a period of up to 14 weeks

  10. Sub-study 1b: Changes in markers of glucose homeostasis in participants with increased weight and participants with type 2 diabetes mellitus after infusion of apelin with or without mixed meal tolerance in obese/overweight and T2DM participants

    TNF-alpha, in pg/ml

    Measured: Visit 2 to visit 5, over a period of up to 14 weeks

  11. Sub-study 2a: Change in forearm blood flow parameters in healthy participants after infusion of relaxin (Absolute Flow)

    Absolute flow in the infused arm, in mg/dL/min

    Measured: Within visit 2, over a period of up to 4 weeks

  12. Sub-study 2a: Change in forearm blood flow parameters in healthy participants after infusion of relaxin (Percentage Change)

    Percentage change in the infused arm, in %

    Measured: Within visit 2, over a period of up to 4 weeks

  13. Sub-study 2a: Change in forearm blood flow parameters in healthy participants after infusion of relaxin (Ratio)

    Ratio, expressed as a number (no units as this is a ratio)

    Measured: Within visit 2, over a period of up to 4 weeks

  14. Sub-study 2b: Change in forearm blood flow parameters in healthy participants after infusion of relaxin in the presence of L-NMMA or normal saline

    Ratio; absolute flow and percentage change in the infused arm

    Measured: Visit 2 to visit 3, over a period of up to 10 weeks

  15. Sub-study 2b: Change in forearm blood flow parameters in health participants after infusion of verapamil in the presence of L-NMMA or normal saline (Ratio)

    Ratio; expressed as a number (no units as this is a ratio)

    Measured: Visit 2 to visit 3, over a period of up to 10 weeks

  16. Sub-study 2b: Change in forearm blood flow parameters in health participants after infusion of verapamil in the presence of L-NMMA or normal saline (Absolute Flow)

    Absolute flow in the infused arm, in mg/dL/min

    Measured: Visit 2 to visit 3, over a period of up to 10 weeks

  17. Sub-study 2b: Change in forearm blood flow parameters in health participants after infusion of verapamil in the presence of L-NMMA or normal saline (Percentage Change)

    Percentage change in the infused arm, In %

    Measured: Visit 2 to visit 3, over a period of up to 10 weeks

  18. Sub-Study 3a: Change in forearm blood flow parameters in healthy participants after incremental infusions of intra-arterial relaxin in the presence of apelin

    Ratio; absolute flow and percentage change in the infused arm

    Measured: Visit 2 to visit 3, over a period of up to 10 weeks

  19. Sub-Study 3a: Change in forearm blood flow parameters in healthy participants after incremental infusions of intra-arterial relaxin in the presence of apelin (Ratio)

    Ratio, expressed as a number (no units as this is a ratio)

    Measured: Visit 2 to visit 3, over a period of up to 10 weeks

  20. Sub-Study 3a: Change in forearm blood flow parameters in healthy participants after incremental infusions of intra-arterial relaxin in the presence of apelin (Absolute Flow)

    Absolute flow in the infused arm, in mg/dL/min

    Measured: Visit 2 to visit 3, over a period of up to 10 weeks

  21. Sub-Study 3a: Change in forearm blood flow parameters in healthy participants after incremental infusions of intra-arterial relaxin in the presence of apelin (Percentage Change)

    Percentage change in the infused arm, In %

    Measured: Visit 2 to visit 3, over a period of up to 10 weeks

  22. Sub-Study 3b: Change in forearm blood flow parameters in healthy participants after incremental infusions of intra-arterial apelin in the presence of relaxin (Ratio)

    Ratio, expressed as a number (no units as this is a ratio)

    Measured: Visit 2 to visit 3, over a period of up to 10 weeks

  23. Sub-Study 3b: Change in forearm blood flow parameters in healthy participants after incremental infusions of intra-arterial apelin in the presence of relaxin (Absolute Flow)

    Absolute flow in the infused arm, in mg/dL/min

    Measured: Visit 2 to visit 3, over a period of up to 10 weeks

  24. Sub-Study 3b: Change in forearm blood flow parameters in healthy participants after incremental infusions of intra-arterial apelin in the presence of relaxin (Percentage Change)

    Percentage change in the infused arm, In %

    Measured: Visit 2 to visit 3, over a period of up to 10 weeks

  25. Sub-study 4: Changes in markers of glucose homeostasis healthy participants, participants with increased weight and participants with type 2 diabetes mellitus after infusion of relaxin with and without apelin (Glucose)

    Glucose, in each of the groups, in mmol/L

    Measured: Visit 2 to Visit 4, over a period of up to 8 weeks

  26. Sub-study 4: Changes in markers of glucose homeostasis healthy participants, participants with increased weight and participants with type 2 diabetes mellitus after infusion of relaxin with and without apelin (C-peptide)

    C-peptide, in each of the groups, in pmol/L

    Measured: Visit 2 to Visit 4, over a period of up to 8 weeks

  27. Sub-study 4: Changes in markers of glucose homeostasis healthy participants, participants with increased weight and participants with type 2 diabetes mellitus after infusion of relaxin with and without apelin (Glucagon)

    glucagon, in each of the groups,in pg/ml

    Measured: Visit 2 to Visit 4, over a period of up to 8 weeks

  28. Sub-study 4: Changes in markers of glucose homeostasis healthy participants, participants with increased weight and participants with type 2 diabetes mellitus after infusion of relaxin with and without apelin (Insulin)

    Insulin, in each of the groups, in pmol/L

    Measured: Visit 2 to Visit 4, over a period of up to 8 weeks

  29. Sub-study 4: Changes in markers of glucose homeostasis healthy participants, participants with increased weight and participants with type 2 diabetes mellitus after infusion of relaxin with and without apelin (TNF-alpha)

    TNF-alpha, in each of the groups, in pg/ml

    Measured: Visit 2 to Visit 4, over a period of up to 8 weeks

  30. Sub-study 5: Change in hand vein diameter after relaxin infusion in healthy participants

    Hand vein Demeter is measured using Aellig dorsal hand vein technique

    Measured: Visit 2

Secondary outcomes (28)
  1. Sub-study 1a: Changes in parameters of cardiovascular haemodynamics in healthy participants after infusion of apelin (Echocardiography)

    Cardiac output measured by Echocardiography, in L/min

    Measured: Visit 2 to visit 4, over a period of up to 8 weeks

  2. Sub-study 1a: Changes in parameters of cardiovascular haemodynamics in healthy participants after infusion of apelin (Innocor)

    Cardiac output measured by Innocor, in L/min

    Measured: Visit 2 to visit 4, over a period of up to 8 weeks

  3. Sub-study 1a: Changes in parameters of cardiovascular haemodynamics in healthy participants after infusion of apelin (Bioimpedance)

    Cardiac output measured by bioimpedance, in L/min

    Measured: Visit 2 to visit 4, over a period of up to 8 weeks

  4. Sub-study 1b: Changes in parameters of cardiovascular haemodynamics in obese/overweight and T2DM participants after infusion of apelin (Echocardiography)

    Cardiac output measured by Echocardiography, in L/min

    Measured: VIsit 2 to visit 4, over a period of up to 8 weeks

  5. Sub-study 1b: Changes in parameters of cardiovascular haemodynamics in obese/overweight and T2DM participants after infusion of apelin (Innocor)

    Cardiac output measured by Innocor, in L/min

    Measured: Visit 2 to visit 4, over a period of up to 8 weeks

  6. Sub-study 1b: Changes in parameters of cardiovascular haemodynamics in obese/overweight and T2DM participants after infusion of apelin (Bioimpedance)

    Cardiac output measured by bioimpedance, in L/min

    Measured: Visit 2 to visit 4, over a period of up to 8 weeks

  7. Sub-study 1b: Changes in parameters of cardiovascular haemodynamics in obese/overweight and T2DM participants after infusion of apelin,after a mixed meal challenge (Echocardiography)

    Cardiac output measured by Echocardiography, in L/min

    Measured: Visit 2 to visit 4, over a period of up to 8 weeks

  8. Sub-study 1b: Changes in parameters of cardiovascular haemodynamics in obese/overweight and T2DM participants after infusion of apelin, after a mixed meal challenge (Innocor)

    Cardiac output measured by Innocor, in L/min

    Measured: Visit 2 to visit 4, over a period of up to 8 weeks

  9. Sub-study 1b: Changes in parameters of cardiovascular haemodynamics in obese/overweight and T2DM participants after infusion of apelin,after a mixed meal challenge (Bioimpedance)

    Cardiac output measured by bioimpedance, in L/min

    Measured: VIsit 2 to visit 4, over a period of up to 8 weeks

  10. Sub-study 1b: Changes in markers of glucose homeostasis after infusion of apelin in obese/overweight and T2DM, after a mixed meal challenge (Clugose)

    Glucose, in mmol/L

    Measured: Visit 2 to visit 5, over a period of up to 14 weeks

  11. Sub-study 1b: Changes in markers of glucose homeostasis after infusion of apelin in obese/overweight and T2DM, after a mixed meal challenge (C-peptide)

    C-peptide, in pmol/L

    Measured: Visit 2 to visit 5, over a period of up to 14 weeks

  12. Sub-study 1b: Changes in markers of glucose homeostasis after infusion of apelin in obese/overweight and T2DM, after a mixed meal challenge (Glucagon)

    Glucagon, in pg/ml

    Measured: Visit 2 to visit 5, over a period of up to 14 weeks

  13. Sub-study 1b: Changes in markers of glucose homeostasis after infusion of apelin in obese/overweight and T2DM, after a mixed meal challenge (Insulin)

    Insulin, in pmol/L

    Measured: Visit 2 to visit 5, over a period of up to 14 weeks

  14. Sub-study 1b: Changes in markers of glucose homeostasis after infusion of apelin in obese/overweight and T2DM, after a mixed meal challenge (TNF alpha)

    TNF alpha, in pg/ml

    Measured: Visit 2 to visit 5, over a period of up to 14 weeks

  15. Sub-study 2b: Change in forearm blood flow parameters after infusion of verapamil in the presence of L-NMMA or saline (Ratio)

    Ratio,expressed as a number (no units as this is a ratio)

    Measured: Visit 2 to visit 3, over a period of up to 10 weeks

  16. Sub-study 2b: Change in forearm blood flow parameters after infusion of verapamil in the presence of L-NMMA or saline (Absolute Flow)

    Absolute flow in the infused arm, in mg/dL/min

    Measured: Visit 2 to visit 3, over a period of up to 10 weeks

  17. Sub-study 2b: Change in forearm blood flow parameters after infusion of verapamil in the presence of L-NMMA or saline (Percentage Change)

    Percentage change in the infused arm, In %

    Measured: Visit 2 to visit 3, over a period of up to 10 weeks

  18. Sub-study 4: Change in cardiovascular haemodynamics after infusion of relaxin (Echocardiography)

    Cardiac output measured by Echocardiography, in L/min

    Measured: Visit 2 to visit 4, over a period of up to 8 weeks

  19. Sub-study 4: Change in cardiovascular haemodynamics after infusion of relaxin (Bioimpedance)

    Cardiac output measured by bioimpedance, in L/min

    Measured: Visit 2 to visit 4, over a period of up to 8 weeks

  20. Sub-study 4: Change in cardiovascular haemodynamics after infusion of relaxin (Innocor)

    Cardiac output measured by Innocor, in L/min

    Measured: Visit 2 to visit 4, over a period of up to 8 weeks

  21. Sub-study 4: Change in cardiovascular haemodynamics after combined infusion of relaxin and apelin (Echocardiography)

    Cardiac output measured by Echocardiography, in L/min

    Measured: Visit 2 to visit 4, over a period of up to 8 weeks

  22. Sub-study 4: Change in cardiovascular haemodynamics after combined infusion of relaxin and apelin (Bioimpedance)

    Cardiac output measured by bioimpedance, in L/min

    Measured: Visit 2 to visit 4, over a period of up to 8 weeks

  23. Sub-study 4: Change in cardiovascular haemodynamics after combined infusion of relaxin and apelin (Innocor)

    Cardiac output measured by Innocor, in L/min

    Measured: Visit 2 to visit 4, over a period of up to 8 weeks

  24. Sub-study 4: Change in glucose homeostasis after combined infusion of relaxin and apelin (Glucose)

    Glucose, in mmol/L

    Measured: Visit 2 to visit 4, over a period of up to 8 weeks

  25. Substudy 4: Change in glucose homeostasis after combined infusion of relaxin and apelin (C-peptide)

    C-peptide, in pmol/L

    Measured: Visit 2 to visit 4, over a period of up to 8 weeks

  26. Sub-study 4: Change in glucose homeostasis after combined infusion of relaxin and apelin (Glucagon)

    Glucagon, in pg/ml

    Measured: Visit 2 to visit 4, over a period of up to 8 weeks

  27. Sub-study 4: Change in glucose homeostasis after combined infusion of relaxin and apelin (Insulin)

    Insulin, in pmol/L

    Measured: Visit 2 to visit 4, over a period of up to 8 weeks

  28. Sub-study 4: Change in glucose homeostasis after combined infusion of relaxin and apelin (TNF alpha)

    TNF alpha, glucose homeostasis

    Measured: Visit 2 to visit 4, over a period of up to 8 weeks

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted28 Feb 2018
  2. Study start28 Mar 2018
  3. Primary completionDec 2026 (estimated)
  4. Study completionDec 2026 (estimated)

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 2
Primary purpose
Other
Allocation
Randomised
Intervention model
Parallel groups
Masking
Triple blind
Who is masked
Participant, Investigator, Outcomes assessor
Enrolment
170 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT03449251
Sponsor's protocol ID
DEFINE (A094666)
Acronym
DEFINE
Status last verified
Sep 2026
First submitted
6 Feb 2018
Last updated
30 Sep 2026
Results posted
No
Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
Undecided

Questions about this trial

What is this clinical trial studying?

A Phase 2 study testing Apelin, Relaxin and Normal saline in people with Cardiovascular Diseases and Type 2 Diabetes Mellitus, run by Cambridge University Hospitals NHS Foundation Trust at 1 site in United Kingdom.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 23 inclusion and 20 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: under way, not looking for participants, as of the sponsor's last update on 30 Sep 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in United Kingdom. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

This study is still under way. Results are not available in the source record yet.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Sub-study 1a: Changes in markers of glucose homeostasis in healthy participants after infusion of apelin (Glucose) (time frame: Visit 2 to visit 4, over a period of up to 8 weeks). The study lists 30 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 30 Sep 2026.

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