Elucidation of the Effects of Growth Hormone (GH) Deficiency and GH Replacement on Clot and Platelet

August 16, 2019 updated by: The Leeds Teaching Hospitals NHS Trust

Large population studies of hypopituitary adults (patients with pituitary gland failure) on conventional hormone replacement, but not growth hormone, have an approximate two fold increase in death rate (mortality). The vast majority of this excess mortality relates to vascular disease. While it is possible that overreplacement with steroids, underreplacement with thyroid hormones and sex hormone deficiency contribute, there are increasing data to support a role for GH in the cause of the excess vascular risk. Although a number of surrogates of vascular risk are described in patients with GH deficiency (GHD), how these translate mechanistically into atherothrombotic (blockage of the arteries) disease has not been fully elucidated.

This proposed study will analyse both traditional (body composition, serum lipids, handling of sugars)and more complex markers (inflammation, procoagulation, fibrinolysis) of vascular risk/disease. In addition the study will examine 24hr blood pressure, arterial wall thickness, clot structure and function, as well as platelet action. Measurements will be performed at baseline and will be reassessed after patients have been on a stable dose of GH replacement for at least three months.

The results of the study will characterise risk factors for vascular disease, and take this a step further to elucidate how these changes translate mechanistically in to vascular damage.

Study Overview

Status

Unknown

Conditions

Intervention / Treatment

Study Type

Observational

Enrollment (Anticipated)

150

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

16 years to 90 years (Child, Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Sampling Method

Non-Probability Sample

Study Population

Hypopituitary adults

Description

Inclusion Criteria:

  • Able to give written consent
  • Adults with confirmed GHD (Insulin stimulation test <3ug/L)
  • Other hormone replacement therapy stable for at least three months

Exclusion Criteria:

  • active malignancy
  • an acute vascular event within three months of the study
  • any therapy other than hormone replacement
  • serum creatinine >120 micromol/l
  • abnormal LFTs (ALT>3 fold upper limit of normal)

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Observational Models: Cohort
  • Time Perspectives: Prospective

Cohorts and Interventions

Group / Cohort
Intervention / Treatment
Growth Hormone Therapy
Drug: Growth Hormone Therapy
Control Group

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
Turbidity analysis.
Time Frame: up to 3 years
up to 3 years

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

The Leeds Teaching Hospitals NHS Trust

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

June 1, 2013

Primary Completion (Anticipated)

July 30, 2020

Study Completion (Anticipated)

July 30, 2020

Study Registration Dates

First Submitted

January 20, 2014

First Submitted That Met QC Criteria

January 28, 2014

First Posted (Estimate)

January 30, 2014

Study Record Updates

Last Update Posted (Actual)

August 19, 2019

Last Update Submitted That Met QC Criteria

August 16, 2019

Last Verified

August 1, 2019

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • ED12/10391
  • 13/YH/0061 (Other Identifier: Research Ethics Committee)

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

product manufactured in and exported from the U.S.

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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