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Growth Hormone Administration and Its Effects on Cardiovascular Risk Factors in Growth Hormone Deficient Women

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00136032
Recruitment Status : Completed
First Posted : August 26, 2005
Last Update Posted : February 18, 2008
Information provided by:
Massachusetts General Hospital

Brief Summary:

The purpose of the study is to evaluate the effects of growth hormone replacement on women with growth hormone deficiency. Growth hormone deficiency means the body no longer produces growth hormone due to a tumor or some kind of disease of the brain in an area called the pituitary/hypothalamic region. This is the area of the brain where growth hormone is normally produced. We, the researchers at Massachusetts General Hospital, will establish the effects of growth hormone replacement on cardiovascular parameters (laboratory tests, the flexibility of the arteries, changes in heart rate) in women with growth hormone deficiency. Our goal is to see if this therapy:

  • has effects on women's cardiovascular risk markers (special blood tests which indicate how healthy the heart and arteries are)
  • has effects on women's types and levels of various substances circulating in their blood
  • in women affects the stiffness of their arteries and heart rate variability in parallel with changes in cardiovascular risk markers
  • has different effects depending on whether women are pre or post menopausal.

Participation in this study is expected to last approximately 12 months.

Condition or disease Intervention/treatment Phase
Growth Hormone Deficiency Drug: Somatropin Drug: Placebo Not Applicable

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 63 participants
Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: Double (Participant, Investigator)
Primary Purpose: Treatment
Official Title: Gender-Specific Effects of Physiologic GH Administration on Cardiovascular Risk Factors in Women With Growth Hormone Deficiency
Study Start Date : January 2002
Actual Primary Completion Date : November 2006
Actual Study Completion Date : November 2006

Arm Intervention/treatment
Active Comparator: 1 Drug: Somatropin
Stratified based on age and estrogen status from 3 to 6 mcg/kg/day
Other Name: Genotropin

Placebo Comparator: 2 Drug: Placebo
Dosage based on age and estrogen status ranging from 3 to 6 mcg/kg/day

Primary Outcome Measures :
  1. Gender specific effects on cardiovascular risk markers [ Time Frame: baseline, 1, 3, 6, 7, 9, and 12 months ]

Secondary Outcome Measures :
  1. Heart Rate Variability [ Time Frame: baseline, 3, 6, 9, and 12 months ]
  2. Quality of Life [ Time Frame: baseline, 1, 3, 6, 7, 9, and 12 months ]

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.

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Ages Eligible for Study:   18 Years to 65 Years   (Adult, Older Adult)
Sexes Eligible for Study:   Female
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • GH deficiency due to pituitary or hypothalamic tumors or disease affecting this area. Subjects will have been treated with medication, surgery, radiation, or a combination of these. GH deficiency will be defined as a peak plasma GH of less than 5 ng/ml in response to insulin tolerance testing or growth hormone releasing hormone (GHRH) plus arginine stimulation test. In subjects with suspected hypothalamic dysfunction the arginine plus L-dopa stimulation test may be used, with a cutoff of 1.7 ng/ml for diagnosis of GH deficiency. Partial GH deficiency will be defined as a GH peak of 5 to 9 ng/ml (inclusive) during insulin tolerance testing or GHRH plus arginine testing.
  • GH deficiency will also be diagnosed if insulin-like growth factor-I (IGF-I) levels are below 2 standard deviations for the age-sex normal range in a patient with at least two documented hormone deficiencies.
  • Subjects must have evidence of a stable pituitary mass (for at least 12 months) if there is a history of a tumor except in the case of ACTH-producing microadenomas, where no follow-up imaging is required after cure.
  • Subjects age 40 and over must have a screening mammogram if they have not already had one within one year prior to their baseline visit

Exclusion Criteria:

  • Active Cushing's disease within 1 year
  • History of acromegaly
  • Untreated thyroid or adrenal insufficiency. Subjects on replacement therapy must be stable for at least 3 months prior to entry into the study.
  • History of malignancy except for skin cancer and except for childhood solid malignancy with documented cure for > 10 years prior to starting the study
  • Hemoglobin <10.0 gm/dl
  • Hepatic or renal disease (SGPT/SGOT > 3x upper limit of normal (ULN) or creatinine levels >2.5 mg/dl)
  • Congestive heart failure (CHF) (New York Heart Association's classification system Class II-IV CHF will be excluded)
  • History of unstable cardiovascular disease (coronary artery or cerebrovascular disease) or symptoms within one year prior to entry into the study
  • Diabetes mellitus
  • Pregnancy or nursing
  • Active carpal tunnel syndrome

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT00136032

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United States, Massachusetts
Massachusetts General Hospital
Boston, Massachusetts, United States, 02114
Sponsors and Collaborators
Massachusetts General Hospital
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Principal Investigator: Anne Klibanski, M.D Massachusetts General Hospital

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Responsible Party: Anne Klibanski, MD, Massachusetts General Hospital / Harvard Medical School Identifier: NCT00136032    
Other Study ID Numbers: 2001p-001761
First Posted: August 26, 2005    Key Record Dates
Last Update Posted: February 18, 2008
Last Verified: February 2008
Keywords provided by Massachusetts General Hospital:
Growth Hormone
Cardiovascular risk
GH Deficiency
Pituitary Tumor
Pituitary Disease
Additional relevant MeSH terms:
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Dwarfism, Pituitary
Endocrine System Diseases
Bone Diseases, Developmental
Bone Diseases
Musculoskeletal Diseases
Bone Diseases, Endocrine
Pituitary Diseases
Hypothalamic Diseases
Brain Diseases
Central Nervous System Diseases
Nervous System Diseases