ClinicalTrials.gov
ClinicalTrials.gov Menu

Human Sperm Binding to Transgenic Mouse Eggs

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.
ClinicalTrials.gov Identifier: NCT00340587
Recruitment Status : Completed
First Posted : June 21, 2006
Last Update Posted : April 5, 2018
Sponsor:
Information provided by (Responsible Party):
National Institutes of Health Clinical Center (CC) ( National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) )

Brief Summary:
At fertilization, the binding of sperm to the zona pellucida induces the acrosome reaction releasing lytic enzymes that facilitate the passage of the sperm through the zona. The sperm then fuses with the egg's plasm membrane and enters the egg's cytoplasm. The zona pellucida, an extracellular matrix composed of three glycoproteins (ZP1, ZP2, ZP3), mediates the species-specific binding of sperm to egg. Although homologous proteins are present in mouse and humans, human sperm will not bind to the mouse zona pellucida and when the zona pellucida is experimentally removed, human sperm will not bind or fuse to the mouse egg's plasm membrane. We have created transgenic mouse lines that express one or more human zona proteins. We wish to determine if human sperm will bind to these chimeric zonae and if this binding will induce the human sperm acrosome reaction. Sperm and devitalized eggs will be collected by collaborating institution(s) under protocols and consent forms approved by that institution's IRB. Only procedures already being performed on subjects for diagnostic or treatment purposes will be used.

Condition or disease
Fertilization

Detailed Description:
At fertilization, the binding of sperm to the zona pellucida induces the acrosome reaction releasing lytic enzymes that facilitate the passage of the sperm through the zona. The sperm then fuses with the egg s plasma membrane and enters the egg s cytoplasm. The zona pellucida, an extracellular matrix composed of three or four glycoproteins, mediates the species-specific binding of sperm to egg. Although homologous proteins are present in mouse and humans, human sperm will not bind to the mouse zona pellucida and when the zona pellucida is experimentally removed, human sperm will not bind or fuse to the mouse egg's plasma membrane. We have established transgenic mouse lines that express one or more human or rat zona proteins. We wish to determine if human sperm will bind to these chimeric zonae and if this binding will induce the human sperm acrosome reaction. Sperm and devitalized eggs will be collected by collaborating institution(s) under protocols and consent forms approved by that institution's IRB. Alternatively, anonymous fertile human sperm will be obtained from a commercial sperm bank using a donor consent agreement. Only procedures already being performed on subjects for diagnostic or treatment purposes will be used.

Study Type : Observational
Actual Enrollment : 13 participants
Official Title: Human Sperm Binding to Transgenic Mouse Eggs
Study Start Date : May 2, 1997
Study Completion Date : February 24, 2016




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.


Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Criteria
  • INCLUSION CRITERIA:

Without regard to ethnic/race background, all subjects will be men and women over the age of 18 who are neither mentally retarded nor disabled.


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 ClinicalTrials.gov identifier (NCT number): NCT00340587


Locations
United States, Maryland
Suburban Hospital
Bethesda, Maryland, United States, 20814
Sponsors and Collaborators
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
Investigators
Principal Investigator: Jurrien Dean, M.D. National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)

Publications:
Responsible Party: National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
ClinicalTrials.gov Identifier: NCT00340587     History of Changes
Other Study ID Numbers: 999997039
OH97-DK-N039
First Posted: June 21, 2006    Key Record Dates
Last Update Posted: April 5, 2018
Last Verified: February 24, 2016

Keywords provided by National Institutes of Health Clinical Center (CC) ( National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) ):
Zona Pellucida
Human Eggs
ZP1, ZP2, ZP3
Fertilization