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Biology and Biochemistry

D-Index
57
Citations
7749
World Ranking
14117
National Ranking
492

Overview

Richard Oko is affiliated with Queen's University in Canada and has contributed extensively to research in Medicine as well as Biochemistry, Genetics, and Molecular Biology. Their work spans several subfields including Reproductive Medicine, Genetics, Public Health, Environmental and Occupational Health, Nutrition and Dietetics, and Molecular Biology.

The scientist's research primarily addresses topics such as Sperm and Testicular Function, Reproductive Biology and Fertility, Animal Genetics and Reproduction, Selenium in Biological Systems, Reproductive Physiology in Livestock, Trace Elements in Health, and Genetic and Clinical Aspects of Sex Determination and Chromosomal Abnormalities.

Frequent coauthors in Richard Oko's collaborative efforts include Peter Šutovský, Lauren E Hamilton, A.D. Barth, V.E.A. Perry, and Michal Zigo.

Their recent papers include the following:

  • Zinc is a master-regulator of sperm function associated with binding, motility, and metabolic modulation during porcine sperm capacitation (2022, Communications Biology)
  • Sperm Cohort-Specific Zinc Signature Acquisition and Capacitation-Induced Zinc Flux Regulate Sperm-Oviduct and Sperm-Zona Pellucida Interactions (2020, International Journal of Molecular Sciences)
  • Sperm proteins ODF2 and PAWP as markers of fertility in breeding bulls (2021, Cell and Tissue Research)
  • Core Histones Are Constituents of the Perinuclear Theca of Murid Spermatozoa: An Assessment of Their Synthesis and Assembly during Spermiogenesis and Function after Gametic Fusion (2021, International Journal of Molecular Sciences)
  • Sperm Redox System Equilibrium: Implications for Fertilization and Male Fertility (2022, Advances in experimental medicine and biology)

They frequently publish in specialized venues including Advances in anatomy, embryology and cell biology, International Journal of Molecular Sciences, Communications Biology, Cell and Tissue Research, and Advances in experimental medicine and biology.

Richard Oko has also contributed to book publications, notably with Springer Science+Business Media. One significant book title is Abnormal Morphology of Bovine Spermatozoa, published in 2025.

Best Publications

  • Mammalian Selenoprotein Thioredoxin-glutathione Reductase ROLES IN DISULFIDE BOND FORMATION AND SPERM MATURATION

    Dan Su;Sergey V. Novoselov;Qi An Sun;Mohamed E. Moustafa

  • PAWP, a Sperm-specific WW Domain-binding Protein, Promotes Meiotic Resumption and Pronuclear Development during Fertilization * ♦

    Alexander T.H. Wu;Peter Sutovsky;Gaurishankar Manandhar;Wei Xu

  • Characterization of Sptrx, a Novel Member of the Thioredoxin Family Specifically Expressed in Human Spermatozoa

    Antonio Miranda-Vizuete;Johanna Ljung;Anastasios E. Damdimopoulos;Jan Åke Gustafsson

  • Spag4, a novel sperm protein, binds outer dense-fiber protein Odf1 and localizes to microtubules of manchette and axoneme.

    Xueping Shao;H. A. Tarnasky;J. P. Lee;R. Oko

  • Role of epithelial cells of the male excurrent duct system of the rat in the endocytosis or secretion of sulfated glycoprotein-2 (clusterin).

    L Hermo;J Wright;R Oko;C R Morales

  • Interactions of sperm perinuclear theca with the oocyte: implications for oocyte activation, anti-polyspermy defense, and assisted reproduction.

    Peter Sutovsky;Gaurishankar Manandhar;Alex Wu;Richard Oko

  • Chromatin reorganization in rat spermatids during the disappearance of testis-specific histone, H1t, and the appearance of transition proteins TP1 and TP2.

    R J Oko;V Jando;C L Wagner;W S Kistler

  • Sperm-derived WW domain-binding protein, PAWP, elicits calcium oscillations and oocyte activation in humans and mice

    Mahmoud Aarabi;Hanna Balakier;Siamak Bashar;Sergey I. Moskovtsev

  • Characterization of human thioredoxin-like 2. A novel microtubule-binding thioredoxin expressed predominantly in the cilia of lung airway epithelium and spermatid manchette and axoneme.

    Christine M. Sadek;Alberto Jiménez;Anastasios E. Damdimopoulos;Thomas Kieselbach

  • Interactional cloning of the 84-kDa major outer dense fiber protein Odf84. Leucine zippers mediate associations of Odf84 and Odf27.

    Xueping Shao;Heide A. Tarnasky;Uwe Schalles;Richard Oko

  • Immunocytochemical localization of proteins utilized in the formation of outer dense fibers and fibrous sheath in rat spermatids: an electron microscope study.

    Y. Clermont;R. Oko;L. Hermo

  • A Novel Testicular Protein, with Sequence Similarities to a Family of Lipid Binding Proteins, Is a Major Component of the Rat Sperm Perinuclear Theca

    Richard Oko;Carlos R. Morales

  • The removal of the sperm perinuclear theca and its association with the bovine oocyte surface during fertilization.

    Peter Sutovsky;Richard Oko;Laura Hewitson;Gerald Schatten

  • Developmental expression of the 84-kDa ODF sperm protein: localization to both the cortex and medulla of outer dense fibers and to the connecting piece.

    U. Schalles;Xueping Shao;F. A. Van Der Hoorn;R. Oko

  • Biogenesis of sperm perinuclear theca and its role in sperm functional competence and fertilization.

    Richard Oko;Peter Sutovsky

  • Molecular cloning and developmental expression of an mRNA encoding the 27 kDa outer dense fiber protein of rat spermatozoa.

    C. R. Morales;R. Oko;Y. Clermont

  • The mammalian testis-specific thioredoxin system

    Antonio Miranda-Vizuete;Christine M. Sadek;Alberto Jiménez;William J. Krause

  • The extracellular protein coat of the inner acrosomal membrane is involved in zona pellucida binding and penetration during fertilization: characterization of its most prominent polypeptide (IAM38).

    Yang Yu;Wei Xu;Young-Joo Yi;Peter Sutovsky

  • Germ cell-specific DNA and RNA binding proteins p48/52 are expressed at specific stages of male germ cell development and are present in the chromatoid body

    R. Oko;R. Korley;M.T. Murray;N.B. Hecht

  • The major subacrosomal occupant of bull spermatozoa is a novel histone H2B variant associated with the forming acrosome during spermiogenesis.

    Ritu B. Aul;Richard J. Oko

Frequent Co-Authors

Peter Sutovsky
Peter Sutovsky University of Missouri
Antonio Miranda-Vizuete
Antonio Miranda-Vizuete Spanish National Research Council
Gerald Schatten
Gerald Schatten University of Pittsburgh
Carlos R. Morales
Carlos R. Morales McGill University
Louis Hermo
Louis Hermo McGill University
Giannis Spyrou
Giannis Spyrou Linköping University
Jan-Åke Gustafsson
Jan-Åke Gustafsson University of Houston
Markku Pelto-Huikko
Markku Pelto-Huikko Tampere University
João Ramalho-Santos
João Ramalho-Santos University of Coimbra
Charles J. Flickinger
Charles J. Flickinger University of Virginia

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