Working... Menu

Study of Pharmacology of 17-OHPC in Pregnancy

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: NCT00409825
Recruitment Status : Completed
First Posted : December 11, 2006
Results First Posted : February 9, 2015
Last Update Posted : February 27, 2015
National Institutes of Health (NIH)
Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
Information provided by (Responsible Party):
University of Pittsburgh

Brief Summary:
We are examining the pharmacology of 17-OHPC in pregnancy, specifically between the second and third trimesters.

Condition or disease Intervention/treatment Phase
Pregnancy Drug: 17-OHPC Procedure: Blood Draws Phase 2

Detailed Description:
The recently completed trial by the National Institute of Child Health and Human Development (NICHD)-sponsored Maternal-Fetal Medicine Units (MFMU) Network has demonstrated that intramuscular 17-alpha-hydroxyprogesterone caproate (17-OHPC) substantially reduces the rate of preterm birth in women at high risk for preterm delivery because of a prior spontaneous preterm birth. No other strategy or treatment for prevention of preterm birth has proven to be effective. Consequently, the American College of Obstetricians and Gynecologists has cautiously supported this treatment but points out that much more information about this therapy and alternative therapies is required. Although a large body of evidence exists about the safety of this treatment, almost nothing is known about the pharmacology of this agent, especially in pregnancy. The purpose of this study is to define the pharmacology of 17-hydroxyprogesterone caproate in pregnancy. This protocol will focus on pharmacokinetics and placental transport and provide preliminary data on the pharmacoepidemiology of 17-OHPC. The primary research question of this study is: Do the pharmacokinetics of 17-OHPC as represented by area under the concentration vs. time curve after IM injection of 250 mg 17-OHPC differ between the second and third trimesters of pregnancy? We will obtain blood samples prior to and daily for one week after injection of 17-OHPC (8 samples total) for each of two parts of the study, with an optional third part for eligible subjects. Additionally, blood samples will be collected prior to each weekly injection of the study drug and at time of delivery. Approximately 60 subjects (ages 18-45) will be accrued at one of the Obstetrical Fetal Pharmacology Research Units (OPRU) Network sites, with 15 at Magee-Womens Hospital of the University of Pittsburgh Medical Center. Study treatment will be administered until delivery. The total duration of this multi-center study is 2-3 years.

Layout table for study information
Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 61 participants
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Basic Science
Official Title: A Study of the Pharmacology of 17-Hydroxyprogesterone Caproate in Pregnancy
Study Start Date : March 2006
Actual Primary Completion Date : April 2008
Actual Study Completion Date : February 2014

Resource links provided by the National Library of Medicine

Arm Intervention/treatment
Experimental: Part 1
Part 1 done after 4 weekly 17-OHPC injections completed, between 20 6/7 to 24 6/7 weeks gestation. 10 cc blood drawn pre-5th injection. 10 cc blood drawn 12 hours post-dose and 7 consecutive days. 24-hour urine collected days 4-5 within 7 days post-injection. Part 2 done 31 0/7 to 34 6/7 or at 35 0/7 weeks. 10 cc blood drawn pre weekly injection, 12 hours post-dose, and 7 consecutive days. 24-hour urine collected between days 4-5 within 7 days post-injection. A subject in whom Part 2 is performed during the last scheduled injection of 17-OHPC (at or around 35 0/7 weeks) will have the option to participate in Part 3, in which 10 cc of blood will be drawn serially over 21 days after completing Part 2. Blood will be drawn on days 9, 11, 14, 17, 20, 24, 28 after the last injection. Part 4: At the time of labor and delivery, subject will have 10cc of blood removed from a maternal peripheral vein. 10cc of blood will be collected from the placenta/umbilical cord after delivery.
Drug: 17-OHPC
Intra-muscular injection of 250 mg 17-OHPC administered weekly between the second and third trimesters of pregnancy, until time of delivery.
Other Name: 17-alpha-hydroxyprogesterone caproate

Procedure: Blood Draws
10 cc of blood will be drawn prior to the fifth weekly administration of 17-OHPC during second trimester of pregnancy, and then once daily for seven consecutive days post-dose. 10 cc of blood also will be drawn prior to weekly administration of 17-OHPC from sixth weekly dose in the second trimester until the last scheduled dose in the third trimester. Prior to this last scheduled dose, 10 cc of blood will be drawn, as well as once daily for seven consecutive days post-dose.

Primary Outcome Measures :
  1. Change in the Area Under the Concentration vs. Time Curve in the Second and Third Trimesters of Pregnancy. [ Time Frame: Second and third trimesters of pregnancy ]

    Change in the area under the concentration vs. time curve in the second and third trimesters of pregnancy.

    We compared AUC at each PK study visit. Measurements were obtained at 0, 1, 2, 3, 4, 5, 6, 7 days.

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.

Layout table for eligibility information
Ages Eligible for Study:   18 Years to 45 Years   (Adult)
Sexes Eligible for Study:   Female
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Singleton gestation prior to 20 0/7 weeks gestation
  • Planning to receive or receiving 17-OHPC (250 mg IM weekly)
  • Previous history of preterm birth
  • Able to give consent

Exclusion Criteria:

  • Fetal demise, anomaly, or growth restriction
  • Hepatic or renal dysfunction
  • Placental previa or abruptio placenta
  • Polyhydramnios/oligohydramnios
  • Short cervix or planned cerclage
  • Chronic use of steroids, antiepileptics, antihypertensives, SSRS, street drugs
  • Participation in another interventional study that influences gestational age at delivery
  • Heparin treatment of known platelet count <100,000/mm3 (because of contraindication to intra-muscular injections)

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): NCT00409825

Layout table for location information
United States, District of Columbia
Georgetown University
Washington, District of Columbia, United States, 20010
United States, Pennsylvania
Magee-Womens Hospital of University of Pittsburgh Medical Center
Pittsburgh, Pennsylvania, United States, 15213
United States, Texas
University of Texas
Galveston, Texas, United States, 77555
United States, Washington
University of Washington
Seattle, Washington, United States, 98195
Sponsors and Collaborators
University of Pittsburgh
National Institutes of Health (NIH)
Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
Layout table for investigator information
Principal Investigator: Steve N. Caritis, MD University of Pittsburgh

ACOG News Release: Progesterone recommended in certain high risk pregnancies to help prevent preterm birth. October 31, 2003
Kiesling H, Elmquist A: Acta Endocrinol 28:502, 1958
Langecker J, Harwart A, Junkmann K: Arch exptl Pathol. Pharacol 225:309, 1955.
Wierner M, Luiu C, Plotz E: Acta Endocrinol 36:511, 1961.
Endocrinology & human gestation. IN: Reproductive Endocrinology, p458. Edited by EY Adashi, Lippincott-Raven Publishers, Philadelphia, PA 1996.
Lye S: Personal communication
Reprotox Database. Hydroxyprogesterone 17-. Reprotox. org. March 1, 2003.
Florey K: Hydroxyprogesterone caproate. IN: Analytical profiles of drug substances. Vol 4. 208-224 Editors: Academic Press, NY, NY, 1975.

Layout table for additonal information
Responsible Party: University of Pittsburgh Identifier: NCT00409825     History of Changes
Other Study ID Numbers: IRB #0603056
5U10HD047905-02 ( U.S. NIH Grant/Contract )
First Posted: December 11, 2006    Key Record Dates
Results First Posted: February 9, 2015
Last Update Posted: February 27, 2015
Last Verified: February 2015

Additional relevant MeSH terms:
Layout table for MeSH terms
17 alpha-Hydroxyprogesterone Caproate
Estrogen Antagonists
Hormone Antagonists
Hormones, Hormone Substitutes, and Hormone Antagonists
Physiological Effects of Drugs