A comparison between the Insulin Tolerance Test (ITT) and the combined growth Hormone Releasing Hormone and Arginine test to determine Growth Hormone (GH) status in cranially irradiated patients.

ISRCTN ISRCTN36070540
DOI https://doi.org/10.1186/ISRCTN36070540
Secondary identifying numbers N0063072321
Submission date
30/09/2005
Registration date
30/09/2005
Last edited
27/08/2008
Recruitment status
No longer recruiting
Overall study status
Completed
Condition category
Nutritional, Metabolic, Endocrine
Prospectively registered
Protocol
Statistical analysis plan
Results
Individual participant data

Plain English summary of protocol

Not provided at time of registration

Contact information

Prof S M Shalet
Scientific

Endocrinology
Christie Hospital NHS Trust
Wilmslow Road
Withington
Manchester
M20 4BX
United Kingdom

Phone +44 (0)161 446 3667
Email stephen.m.shalet@manchester.ac.uk

Study information

Study designRandomised controlled trial
Primary study designInterventional
Secondary study designRandomised controlled trial
Study setting(s)Hospital
Study typeTreatment
Scientific title
Study objectivesWe aim to study the pattern of growth hormone response to a combination of GHRH (growth hormone releasing hormone) plus Arginine in adults with radiation induced growth hormone deficiency, to find out whether this stimulation test can successfully replace the Insulin Tolerance Test (ITT) for the diagnosis of radiation-induced growth hormone.
Ethics approval(s)Not provided at time of registration
Health condition(s) or problem(s) studiedNutritional, Metabolic, Endocrine: Growth hormone deficiency
InterventionPatients will be reviewed in Endocrine Clinic. Those who fulfil the inclusion criteria will be invited to participate. An information sheet will provide full details of the study and what is involved. It is established practice that patients sign an informed consent before undergoing GH tests. Patients will undergo the ITT and GHRH+ARG. Stimulation tests in random order, at least three days apart. After overnight fasting, the patient will be admitted to the endocrine unit at 08:30h. A cannula will be inserted into a forearm vein and kept patent by normal saline. For the ITT, a bolus of 0.1u/kgregular insulin (actrapid) will be given intravenously and the blood glucose level measured (by glucometer) every 15 min. The patient will not be left unattended until the test is finished and the blood glucose level has returned to normal.
For the GHRH+Arginine test, a bolus of 1ug/kg GHRH24 will be infused over 30 min, from 0 to 30 min. Blood samples will be taken every 15 min from -15 to 120 min. They will be assayed for GH, IGF-I, IGFBP3 and Acid Labile sub-unit (ALS).
Intervention typeDrug
Pharmaceutical study type(s)
PhaseNot Specified
Drug / device / biological / vaccine name(s)combination of GHRH (growth hormone releasing hormone) plus Arginine
Primary outcome measurePrimary end point: growth hormone response to different provocative tests.
Secondary outcome measuresNot provided at time of registration
Overall study start date26/05/2000
Completion date31/12/2008

Eligibility

Participant type(s)Patient
Age groupAdult
SexNot Specified
Target number of participants30-40 patients from the Trust will be entered to this study.
Key inclusion criteriaNot provided at time of registration
Key exclusion criteria1. Patients with pituitary tumours or previous surgery in the hypothalamic-pituitary field (non radiation-induced damage)
2. Patients with active or uncured malignancy
3. Patients who are suffering from any condition or disease or taking any medication that might affect the function of the hypothalamic-pituitary axis or interfere with the interpretation of the tests
4. Failure to sign an informed consent
Date of first enrolment26/05/2000
Date of final enrolment31/12/2008

Locations

Countries of recruitment

  • England
  • United Kingdom

Study participating centre

Endocrinology
Manchester
M20 4BX
United Kingdom

Sponsor information

Department of Health
Government

Richmond House
79 Whitehall
London
SW1A 2NL
United Kingdom

Phone +44 (0)20 7307 2622
Email dhmail@doh.gsi.org.uk
Website http://www.dh.gov.uk/Home/fs/en

Funders

Funder type

Government

Christie Hospital NHS Trust, Christie Endocrinology Department Research Fund (UK), NHS R&D Support Funding

No information available

Results and Publications

Intention to publish date
Individual participant data (IPD) Intention to shareNo
IPD sharing plan summaryNot provided at time of registration
Publication and dissemination planNot provided at time of registration
IPD sharing plan

Study outputs

Output type Details Date created Date added Peer reviewed? Patient-facing?
Results article results 01/01/2003 Yes No