Quality assurance of human sperm for ICSI, exclusion of sperm with double and single strand breaks

2006 Fiscal Year Final Research Report Summary

• Project/Area Number: 17591761
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Obstetrics and gynecology
• Research Institution: Tokyo Dental College
• Principal Investigator: KANEKO Satoru Tokyo Dental College, Department of Dentistry, associate professor, 歯学部, 講師 (40214457)
• Co-Investigator(Kenkyū-buntansha): ISHIKAWA Hiromichi Tokyo Dental College, professor, 歯学部, 教授 (60112679)
• Project Period (FY): 2005 – 2006
• Keywords: sperm / DNA / double strand break / single strand break / deoxy-adenosine

Research Abstract

1.The present study developed single cell pulse field electrophoresis (SPCPGE) to develop whole DNA fibers, furthermore they were elongated up to 0.5-1.0 mm by the use of pendular motion stage in SPCFGE.
2.Human sperm culture in low oxygen concentration suppressed the induction of double strand breaks in DNA fibers.
3.The patients with HIV usually take anti-HIV drugs. In these, nuclear base analogs might affect spermatogenesis, especially some damages might occur in sperm DNA. The present study established the method for complete exclusion of HIV from the washed sperm suspension by means of equilibrium sedimentation, differential velocity centrifugation and subsequent swim up. SPCFGE confirmed that almost all the sperm in the resulting sperm suspension were without double strand break in DNA.
4.Human seminal plasma involved extracellular DNA fragments. The present study developed the method for selective adenine extraction from DNA fibers by means of acid denature. The amount of DNA was not correlated with semen qualities such as sperm concentration, motility, morphology. It was extremely high in Klieinfelter syndrome.

Research Products

• [Journal Article] Complete removal of HIV-1 RNA and proviral DNA from semen by the swim-up method : assisted reproduction technique using spermatozoa free from HIV-1. (2006)
  • Author(s): Kato S, Hanabusa H, Kaneko S, Takakuwa K, Suzuki M, Kuji N, Jinno M, Tanaka R, Kojima K, Iwashita M, Yoshimura Y, Tanaka K
  • Journal Title: AIDS 20 Pages: 967-973
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] Complete removal of HIV-1 RNA and proviral DNA from semen by the swim-up method : assisted reproduction technique using spermatozoa free from HIV-l. (2006)
  • Author(s): Kato S, Hanabusa H, Kaneko S, Takakuwa K, Suzuki M, Kuji N, Jinno M, Tanaka R, Kojima K, Iwashita M, Yoshimura Y, Tanaka K.
  • Journal Title: AIDS 20 Pages: 967-973
  • Description: 「研究成果報告書概要(欧文)」より