World's Best Scientists 2026 revealed!

D-Index & Metrics

Biology and Biochemistry

D-Index
118
Citations
50344
World Ranking
700
National Ranking
444

Research.com Recognitions

  • 2001 - Member of the National Academy of Sciences
  • 1997 - Polish Academy of Science

Overview

Ryuzo Yanagimachi was affiliated with the University of Hawaii at Manoa in the United States. Their research focused primarily within the field of medicine, with a specialized emphasis on reproductive medicine and related subfields such as public health, environmental and occupational health, endocrinology, diabetes and metabolism, pediatrics, perinatology, child health, and genetics.

The main topics covered in Yanagimachi's work included reproductive biology and fertility, sperm and testicular function, hormonal and reproductive studies, genetic and clinical aspects of sex determination and chromosomal abnormalities, reproductive physiology in livestock, assisted reproductive technology and twin pregnancy, and prenatal screening and diagnostics.

Yanagimachi authored and co-authored several recent papers, reflecting ongoing contributions to various aspects of reproductive science. These papers included:

  • Acrosin is essential for sperm penetration through the zona pellucida in hamsters (2020, Proceedings of the National Academy of Sciences)
  • Mysteries and unsolved problems of mammalian fertilization and related topics (2022, Biology of Reproduction)
  • Mitochondrial Transfer into Human Oocytes Improved Embryo Quality and Clinical Outcomes in Recurrent Pregnancy Failure Cases (2023, International Journal of Molecular Sciences)
  • Both Cauda and Caput Epididymal Sperm Are Capable of Supporting Full-Term Development in FVB and CD-1 Mice (2020, Developmental Cell)
  • Sperm acrosome status before and during fertilization in the Chinese hamster (Cricetulus griseus), and observation of oviductal vesicles and globules (2021, Molecular Reproduction and Development)

Frequent coauthors associated with Yanagimachi's research included Miwa Tamura-Nakano, Michiko Hirose, Arata Honda, J. Fulka, and Shogo Matoba.

Publication venues where Yanagimachi's research appeared included:

  • Proceedings of the National Academy of Sciences
  • Biology of Reproduction
  • International Journal of Molecular Sciences
  • Developmental Cell
  • Molecular Reproduction and Development

Throughout their career, Yanagimachi was recognized with several honors, including membership in the National Academy of Sciences in 2001 and affiliation with the Polish Academy of Science in 1997.

Best Publications

  • Full-term development of mice from enucleated oocytes injected with cumulus cell nuclei

    T Wakayama;Anthony C F Perry;Anthony C F Perry;M Zuccotti;M Zuccotti;K R Johnson

  • Intracytoplasmic sperm injection in the mouse.

    Yasuyuki Kimura;R. Yanagimachi

  • The Use of Zona-Free Animal Ova as a Test-System for the Assessment of the Fertilizing Capacity of Human Spermatozoa

    Yanagimachi R;Yanagimachi H;Rogers Bj

  • Mechanisms of Fertilization in Mammals

    R. Yanagimachi

  • Epigenetic Instability in ES Cells and Cloned Mice

    David Humpherys;Kevin Eggan;Hidenori Akutsu;Konrad Hochedlinger

  • Hybrid vigor, fetal overgrowth, and viability of mice derived by nuclear cloning and tetraploid embryo complementation

    Kevin Eggan;Hidenori Akutsu;Janet Loring;Laurie Jackson-Grusby

  • Calcium dependence of the acrosome reaction and activation of guinea pig spermatozoa.

    R. Yanagimachi;N. Usui

  • Mammalian transgenesis by intracytoplasmic sperm injection

    Ryuzo Yanagimachi

  • Mice cloned from embryonic stem cells.

    Teruhiko Wakayama;Ivan Rodriguez;Anthony C. F. Perry;Ryuzo Yanagimachi

  • Cloning of male mice from adult tail-tip cells

    Teruhiko Wakayama;Ryuzo Yanagimachi

  • Incomplete reactivation of Oct4-related genes in mouse embryos cloned from somatic nuclei.

    Alex Bortvin;Kevin Eggan;Helen Skaletsky;Helen Skaletsky;Hidenori Akutsu

  • The movement of golden hamster spermatozoa before and after capacitation.

    R. Yanagimachi

  • Is calcium ionophore a universal activator for unfertilised eggs

    Richard A. Steinhardt;David Epel;Edward J. Carroll;Ryuzo Yanagimachi

  • Abnormal gene expression in cloned mice derived from embryonic stem cell and cumulus cell nuclei

    David Humpherys;Kevin Eggan;Hidenori Akutsu;Adam Friedman

  • Ultrastructural localization of lectin-binding sites on the zonae pellucidae and plasma membranes of mammalian eggs.

    G L Nicolson;R Yanagimachi;H Yanagimachi

  • Direct analysis of the chromosome constitution of human spermatozoa

    Edwina Rudak;Patricia A. Jacobs;Ryuzo Yanagimachi

  • Mouse oocytes injected with testicular spermatozoa or round spermatids can develop into normal offspring

    Y. Kimura;R. Yanagimachi

  • Microsurgical Injection of Spermatozoa into Hamster Eggs with Subsequent Transformation of Sperm Nuclei into Male Pronuclei

    Uehara T;Yanagimachi R

  • Development of normal offspring from oocytes injected with freeze-dried spermatozoa

    Teruhiko Wakayama;Ryuzo Yanagimachi

  • Cloned mice have an obese phenotype not transmitted to their offspring

    Kellie L.K. Tamashiro;Teruhiko Wakayama;Hidenori Akutsu;Yukiko Yamazaki

Frequent Co-Authors

Teruhiko Wakayama
Teruhiko Wakayama University of Yamanashi
Gary N. Cherr
Gary N. Cherr University of California, Davis
John R. McCarrey
John R. McCarrey The University of Texas at San Antonio
Anthony C.F. Perry
Anthony C.F. Perry University of Bath
Atsuo Ogura
Atsuo Ogura University of Tsukuba
Randall R. Sakai
Randall R. Sakai University of Cincinnati
Garth L. Nicolson
Garth L. Nicolson University of Helsinki
Marisa S. Bartolomei
Marisa S. Bartolomei University of Pennsylvania
Nechama S. Kosower
Nechama S. Kosower Tel Aviv University
Kevin Eggan
Kevin Eggan Harvard University

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