K. Niwa

发表

Influence of cumulus cells on in vitro fertilization of bovine oocytes derived from in vitro maturation

K. Okuda, R. Chian, K. Niwa, 1995 .

Identification, localization and involvement of glycosidases in sperm-zona interaction using frozen-thawed ejaculated pig spermatozoa.

K. Iga, Kwang-wook Park, K. Niwa, 2000 .

Effects of phosphate, energy substrates, and amino acids on development of in vitro-matured, in vitro-fertilized bovine oocytes in a chemically defined, protein-free culture medium.

J. Kim, K. Okuda, J. M. Lim, 1993, Biology of reproduction.

Effects of different protein supplements in fertilization medium on in vitro penetration of cumulus-intact and cumulus-free bovine oocytes matured in culture.

P. Tajik, T. Murase, K. Niwa, 1993, Theriogenology.

Effect of Monosaccharide L-fucose and Polysaccharide Fucoidan on Sperm ??L-fucosidase Activity and Relation to Sperm-oocyte Interaction in Pig

K. Niwa, Y. Piao, C. K. Park, 2007 .

Binding of Lectins to the Zona Pellucida of In Vitro Matured Pig Oocytes and Sperm-Oocyte Interaction In Vitro.

K. Iga, K. Niwa, Xuexiong Song, 1999 .

Effects of sperm treatments on the in vitro development of bovine oocytes in semidefined and defined media.

H. Rodríguez-Martínez, B. Larsson, K. Niwa, 1997, Theriogenology.

Ca2+‐Regulating mechanisms that modulate bull sperm capacitation and acrosomal exocytosis as determined by chlortetracycline analysis

K. Niwa, L. Fraser, L. R. Abeydeera, 1995, Molecular reproduction and development.

Effects of Estrous Bovine Cervical Mucus on Capacitation and the Acrosome Reaction of Frozen-Thawed Spermatozoa in Vitro.

K. Okuda, K. Niwa, T. Murase, 1992 .

Early events of in-vitro fertilization of cat eggs by epididymal spermatozoa.

A. Iritani, Y. Hosoi, K. Niwa, 1985, Journal of reproduction and fertility.

Capacitation status and in vitro fertility of boar spermatozoa: effects of seminal plasma, cumulus-oocyte-complexes-conditioned medium and hyaluronan.

H. Rodríguez-Martínez, T. Nagai, A. Asano, 2002, International journal of andrology.

Effect of pretreatment of rat spermatozoa with high concentrations of NaCl on sperm capacitation and fertilization of eggs in vitro.

M. C. Chang, K. Niwa, 1975, Biology of reproduction.

DNA stability and thiol-disulphide status of rat sperm nuclei during epididymal maturation and penetration of oocytes

K. Niwa, H. Funahashi, S. Said, 1999, Zygote.

Effects of 17beta-estradiol on in vitro maturation of pig oocytes in protein-free medium.

M. Hunter, K. Niwa, Q. Li, 2004, The Journal of reproduction and development.

Effects of 17β-Estradiol on In Vitro Maturation of Pig Oocytes in Protein-Free Medium

L. Qing, M. Hunter, K. Niwa, 2000 .

Production of plasminogen activators (PAs) in bovine cumulus-oocyte complexes during maturation in vitro: effects of epidermal growth factor on production of PAs in oocytes and cumulus cells.

S. Choi, K. Niwa, K. W. Park, 1999, Biology of reproduction.

STUDIES ON TUMOR NECR()SIS FACTOR-a AND ITS RECEPTOR IN BOVINE CORPUS LUTEIJM

K. Okuda, R. Sakumoto, K. Niwa, 2011 .

Localisation of the hyaluronan receptor CD44 in porcine cumulus cells during in vivo and in vitro maturation

H. Rodríguez-Martínez, E. Sato, K. Niwa, 2002, Zygote.

Development of rat oocytes following intracytoplasmic injection of sperm heads isolated from testicular and epididymal spermatozoa.

K. Niwa, M.-S. Han, S. Said, 2003, Theriogenology.

Develop to Term Rat Oocytes Injected with Heat-Dried Sperm Heads

Min Kyu Kim, J. H. Lee, KyungBon Lee, 2013, PloS one.

Vitrification of rat embryos at various developmental stages.

M. Kasai, K. Niwa, M.-S. Han, 2003, Theriogenology.

In Vivo Development of Vitrified Rat Embryos: Effects of Timing and Sites of Transfer to Recipient Females1

M. Kasai, K. Niwa, Myung-sook Han, 2004, Biology of reproduction.

Factors Affecting Development In Vitro of Bovine and Rat 1-Cell Embryos

K. Miyoshi, K. Niwa, H. Funahashi, 1996 .

Maturation-promoting factor (MPF) is responsible for the transformation of sperm nuclei to metaphase chromosomes in maturing bovine oocytes in vitro.

K. Okuda, K. Niwa, L. R. Abeydeera, 1993, Journal of reproduction and fertility.

Stage-specific requirement of cysteine during in vitro maturation of porcine oocytes for glutathione synthesis associated with male pronuclear formation.

K. Sawai, K. Niwa, H. Funahashi, 1997, Biology of reproduction.

Penetration of zona-free hamster eggs in vitro by goat spermatozoa preincubated in the reproductive tract isolated from a maturing gilt.

H. Imai, A. Iritani, K. Niwa, 1980, The Journal of experimental zoology.

Fertilization of rat eggs in vitro at various times before and after ovulation with special reference to fertilization of ovarian oocytes matured in culture.

M. C. Chang, K. Niwa, M. Chang, 1975, Journal of reproduction and fertility.

Effectiveness of in vitro maturation and in vitro fertilization techniques in pigs.

K. Niwa, 2020, Journal of reproduction and fertility. Supplement.

Developmental Abilities of Rat and Mouse Pronuclear Eggs Following Interspecific Nuclear or Cytoplasmic Transplantation

K. Niwa, H. Funahashi, 1992 .

Activation, Pronuclear Formation, and Development In Vitro of Pig Oocytes Following Intracytoplasmic Injection of Freeze-Dried Spermatozoa1

K. Niwa, Ki-Eun Park, In‐Kiu Kwon, 2004, Biology of reproduction.

In-vitro penetration of pig oocytes matured in culture by frozen-thawed ejaculated spermatozoa.

K. Okuda, W. Wang, K. Niwa, 1991, Journal of reproduction and fertility.

Sperm penetration in vitro of pig follicular oocytes matured in culture.

H. Imai, A. Iritani, K. Niwa, 1978, Journal of reproduction and fertility.

Effects of cysteine in serum-free maturation medium on male pronuclear formation of maturing pig oocytes penetrated in vitro

K. Sawai, K. Niwa, H. Funahashi, 1997 .

Effect of sperm penetration in vitro on completion of first meiosis by bovine oocytes arrested at various stages in culture.

R. Chian, K. Niwa, H. Nakahara, 1992, Journal of reproduction and fertility.

Both fertilization promoting peptide and adenosine stimulate capacitation but inhibit spontaneous acrosome loss in ejaculated boar spermatozoa in vitro

T. Nagai, K. Niwa, L. Fraser, 2000, Molecular reproduction and development.

Optimal sperm concentration and minimal number of spermatozoa for fertilization in vitro of rat eggs.

M. C. Chang, K. Niwa, M. Chang, 1974, Journal of reproduction and fertility.

Effects of feeder cells and growth factors on the proliferation of mouse primordial germ cells

T. Tokunaga, H. Imai, K. Niwa, 1995 .

Sperm penetration in vitro of human oocytes matured in a chemically defined medium.

A. Iritani, T. Nishimoto, K. Niwa, 1982, Journal of reproduction and fertility.

Temporal relationship between insemination and sperm penetration in immature rats, with special reference to the effect of incubation of spermatozoa.

M. C. Chang, K. Niwa, 1975, Fertility and sterility.

Effect of chondroitin sulfate C on sperm capacitation and fertilization parameters in vitro in pigs.

K. Niwa, Z. Xu, Y. Piao, 2008, Animal reproduction science.

Penetration in vitro of zona-free pig oocytes by homologous and heterologous spermatozoa.

K. Niwa, X. Songa, Yasuhiro Kawai, 2002, Theriogenology.

Time requirement for capacitation of boar spermatozoa assessed by their ability to penetrate the zona-free hamster egg.

H. Imai, A. Iritani, K. Niwa, 1979, Journal of reproduction and fertility.

Amino acids in maturation medium and presence of cumulus cells at fertilization promote male pronuclear formation in porcine oocytes matured and penetrated in vitro.

H. Ka, K. Sawai, W. Wang, 1997, Biology of reproduction.

Bovine Oocytes Can Be Penetrated in Modified Tris-buffered Medium

K. Niwa, Kwang‐Wook Park, 2009 .

Synergistic effect of caffeine and heparin on in-vitro fertilization of cattle oocytes matured in culture.

K. Niwa, O. Ohgoda, 1988, Theriogenology.

Effect of polyvinylpyrrolidone on bovine oocyte maturation in vitro and subsequent fertilization and embryonic development.

Lan Xu, L. Tosca, R. Chian, 2007, Reproductive biomedicine online.

Ultrastructural observations of boar spermatozoa penetrating zona-free hamster eggs.

H. Imai, A. Iritani, K. Niwa, 1980, Biology of Reproduction.

Penetration in vitro of zona-free hamster eggs by ejaculated boar spermatozoa.

H. Imai, A. Iritani, K. Niwa, 1977, Journal of reproduction and fertility.

Requirement of capacitation for sperm penetration of zona-free rat eggs.

M. C. Chang, K. Niwa, 1975, Journal of reproduction and fertility.

Fertilization in vitro of eggs and first cleavage of embryos in different strains of mice.

A. Iritani, K. Niwa, M. Araki, 1980, Biology of reproduction.

Various conditions for the fertilization of rat eggs in vitro.

M. C. Chang, K. Niwa, 1974, Biology of reproduction.

Electric fusion of 2-cell rat embryo blastomeres.

K. Niwa, H. Funahashi, 1990 .

The effect of sperm concentrations during preincubation and at insemination on fertilization of rat eggs in vitro.

H. Nishimura, A. Iritani, M. Miyake, 1982, The Journal of experimental zoology.

Effects of sperm concentration on the capacitation of rat spermatozoa.

M. C. Chang, K. Niwa, 1974, The Journal of experimental zoology.

Functional analysis using chlortetracycline fluorescence and in vitro fertilization of frozen-thawed ejaculated boar spermatozoa incubated in a protein-free chemically defined medium.

W. Wang, K. Niwa, L. Fraser, 1995, Journal of reproduction and fertility.

Development of rat one-cell embryos in a chemically defined medium: effects of glucose, phosphate and osmolarity.

K. Okuda, K. Miyoshi, K. Niwa, 1994, Journal of reproduction and fertility.

In vitro penetration of zona pellucida of salt-stored bovine oocytes before and after maturation by frozen-thawed spermatozoa.

K. Okuda, R. Chian, K. Niwa, 1991, Theriogenology.

The importance of NaCl concentration in a chemically defined medium for the development of bovine oocytes matured and fertilized in vitro.

J. Kim, K. Okuda, J. M. Lim, 1994, Theriogenology.

Possible Involvement of Insulin-like Growth Factor-I in Mediating the Stimulatory Effect of Recombinant Bovine Growth Hormone on Maturation of Bovine Oocytes In Vitro

A. Bartke, K. Iga, K. Niwa, 1998 .

In vitro fertilization of bovine oocytes in a chemically defined, protein-free medium varying the bicarbonate concentration.

K. Okuda, P. Tajik, W. Wang, 1994, Biology of reproduction.

Fertilization in vitro of rat eggs as affected by the maturity of the females and the sperm concentration.

M. C. Chang, K. Niwa, 1973, Journal of reproduction and fertility.

Inhibition of Mammalian Fertilization in Vitro by Membrane Vesicles from Seminal Plasma

K. Niwa, B. K. Davis, 1974, Proceedings of the Society for Experimental Biology and Medicine. Society for Experimental Biology and Medicine.

Activation and penetration in vitro of pig oocytes treated with calcium ionophore.

A. Asano, K. Niwa, 2004, The Journal of reproduction and development.

Effect of Treatment of In Vitro Matured Pig Oocytes with Calcium Ionophore on Monospermic Penetration In Vitro

Koji Niwa, Xue-Xiong Song, Xian-Mian Zhao, 2002 .

Effect of sperm concentration during preincubation in a defined medium on fertilization in vitro of pig follicular oocytes.

T. Nagai, A. Iritani, K. Niwa, 1984, Journal of reproduction and fertility.

Capacitation of bull spermatozoa and fertilization in vitro of cattle follicular oocytes matured in culture.

K Niwa, A. Iritani, A Iritani, 1977, Journal of reproduction and fertility.

Glucose requirement at different developmental stages of in vitro fertilized bovine embryos cultured in semi-defined medium.

J. Kim, K. Okuda, K. Niwa, 1993, Theriogenology.

Effects of osmolarity and amino acids in a chemically defined medium on development of rat one-cell embryos.

K. Okuda, K. Miyoshi, K. Niwa, 1995, Journal of reproduction and fertility.

Effect of various hexoses on sperm capacitation and penetration of rat eggs in vitro.

A. Iritani, K. Niwa, 1978, Journal of reproduction and fertility.

Stage-specific requirement of phosphate for development of rat 1-cell embryos in a chemically defined medium

K. Miyoshi, K. Niwa, 1997, Zygote.

Effect of the Presence of Glucose during Fertilization and/or Culture in a Chemically Semi-Defined Medium on the Development of Bovine Oocytes Matured and Fertilized in Vitro

K. Okuda, J. Lim, K. Niwa, 1993 .

Fertilization and early cleavage in vitro of ageing bovine oocytes after maturation in culture.

R. Chian, K. Niwa, H. Nakahara, 1992, Theriogenology.

Effect of cumulus cells present during different periods of culture on maturation in vitro of bovine oocytes

R. Chian, K. Niwa, 1994 .

Effects of cumulus cells on male pronuclear formation and subsequent early development of bovine oocytes in vitro.

R. Chian, M. Sirard, K. Niwa, 1994, Theriogenology.

Fertilization in vitro of rabbit eggs by epididymal spermatozoa capacitated in a chemically defined medium.

A. Iritani, Y. Hosoi, K. Niwa, 1981, Biology of reproduction.

Protective effect of sucrose on the survival of mouse and rat embryos stored at 0°C

A. Iritani, M. Kasai, K. Niwa, 1983 .

Effects of partial removal of cytoplasmic lipid on survival of vitrified germinal vesicle stage pig oocytes.

K. Niwa, Myung-sook Han, In‐Kiu Kwon, 2005, The Journal of reproduction and development.

Stage-dependent development of rat 1-cell embryos in a chemically defined medium after fertilization in vivo and in vitro.

K. Miyoshi, T. Kono, K. Niwa, 1997, Biology of reproduction.

Efficacy and safety of Macrolane™ for breast enhancement: A 12-month follow-up study in Asian women

Satoru Yamaguchi, Koji Niwa, S. Yamaguchi, 2013, Journal of plastic surgery and hand surgery.

Penetration of porcine oocytes during maturation in vitro by cryopreserved, ejaculated spermatozoa.

K. Okuda, W. Wang, K. Niwa, 1994, Biology of reproduction.

Synergetic effects of epidermal growth factor and gonadotropins on the cytoplasmic maturation of pig oocytes in a serum–free medium

W. Wang, K. Niwa, 1995, Zygote.

Transformation of sperm nuclei into metaphase chromosomes in maturing pig oocytes penetrated in vitro

W. Wang, K. Niwa, 1997, Zygote.

Effects of Fetal Calf Serum, Pig Follicular Fluid, and Gonadotropins on Maturation of Pig Oocytes Cultured in Different Media

H. Ka, K. Niwa, K. Im, 1997 .

Effects of Follicle Cells on in vitro Penetration of Pig Oocytes by Cryopreserved, Ejaculated Spermatozoa

K. Niwa, M. Uchida, Wei‐Hua Wang, 1992 .

Penetration in vitro of bovine oocytes during maturation by frozen-thawed spermatozoa.

K. Okuda, K. Niwa, C. K. Park, 1991, Journal of reproduction and fertility.

Variations in penetration rates in vitro of bovine follicular oocytes do not reflect conception rates after artificial insemination using frozen semen from different bulls

S. Takahashi, K. Niwa, O. Ohgoda, 1988 .

Fertilization in vitro of cattle follicular oocytes with ejaculated spermatozoa capacitated in a chemically defined medium.

A. Iritani, M. Kasai, K. Niwa, 1984, Journal of reproduction and fertility.

Factors required during preculture of rat oocytes soon after sperm penetration for promoting their further development in a chemically defined medium.

P. Iannaccone, K. Niwa, Xinzhi Yang, 2004, The Journal of reproduction and development.

Two‐phase chemically defined culture system for preimplantation rat embryos

V. Galat, P. Iannaccone, R. Garton, 2003, Genesis.

Penetration In Vitro of Naturally Ovulated Rat Eggs and the Development of Eggs in a Chemically Defined Medium

K. Miyoshi, K. Niwa, Noriko Tanaka, 1995 .

Development of in vitro matured bovine oocytes after cryopreservation with different cryoprotectants.

W. Hwang, J. Ko, H. Chung, 1999, Theriogenology.

Effects of various cryoprotective agents on the survival of unfrozen and frozen mouse embryos.

A. Iritani, M. Kasai, K. Niwa, 1981, Journal of reproduction and fertility.

Survival of mouse embryos frozen and thawed rapidly.

A. Iritani, M. Kasai, K. Niwa, 1980, Journal of reproduction and fertility.

Protective effect of sucrose on the survival of mouse and rat embryos stored at 0 degree C.

A. Iritani, M. Kasai, K. Niwa, 1983, Journal of reproduction and fertility.

Exposure of bovine oocytes to EGF during maturation allows them to develop to blastocysts in a chemically-defined medium.

K. Iga, K. Niwa, K. W. Park, 1997, Theriogenology.

Activation of bovine oocytes penetrated after germinal vesicle breakdown

K. Okuda, K. Niwa, L. R. Abeydeera, 1994, Zygote.

Ability of in vitro maturing bovine oocytes to transform sperm nuclei to metaphase chromosomes.

K. Niwa, L. R. Abeydeera, 1992, Journal of reproduction and fertility.

Recombinant Bovine Growth Hormone Stimulates Nuclear Maturation of Bovine Oocytes in Vitro and Promotes Subsequent Embryonic Development

A. Bartke, K. Iga, K. Niwa, 1998 .

Completion of first meiosis by sperm penetration in vitro of bovine oocytes inhibited at metaphase-I with dimethylsulphoxide.

R. Chian, K. Niwa, 1994, Theriogenology.

Penetration of bovine follicular oocytes by frozen-thawed spermatozoa in the presence of caffeine and heparin.

K Niwa, C K Park, O Ohgoda, 1989, Journal of reproduction and fertility.

Isolation and Nature of Mouse Embryonic Stem Cell Line Efficiently Producing Female Germ-line Chimeras

Shinichi Aizawa, T. Tokunaga, H. Imai, 1995 .

Effects of BSA and fetal bovine serum in culture medium on development of rat embryos.

K. Niwa, Myung-sook Han, 2003, The Journal of reproduction and development.

Effects of fetal calf serum in culture medium on development of bovine oocytes matured and fertilized in vitro.

K. Okuda, J. M. Lim, K. Niwa, 1994, Theriogenology.

Survival of rat embryos after freezing.

A. Iritani, M. Kasai, K. Niwa, 1982, Journal of reproduction and fertility.

Co-culture of Cumulus-Enclosed Bovine Oocytes with Theca Cells Induces the Meiotic Arrest but does not Inhibit Germinal Vesicle Development

K. Niwa, H. Funahashi, Kwang‐Wook Park, 1999 .

Production of hyaluronic acid by porcine oocyte-cumulus cells complexes during in vitro maturation

H. Rodríguez-Martínez, H. Pertoft, K. Niwa, 1997 .

Reversible changes in protein phosphorylation during germinal vesicle breakdown and pronuclear formation in bovine oocytes in vitro

M. Sirard, R. Chian, M. Sirard, 2003, Zygote.

Fertilization and Development In Vitro of Bovine Oocytes Following Intracytoplasmic Injection of Heat-Dried Sperm Heads

KyungBon Lee, K. Niwa, 2006, Biology of reproduction.

Sperm penetration in vitro of human oocytes matured in a chemically defined medium.

A. Iritani, T. Nishimoto, K. Niwa, 1982, Journal of reproduction and fertility.

Effects of Cumulus Cells on the Ability of Pig Oocytes to Utilize Cysteine or Cystine During Maturation In Vitro

K. Sawai, K. Niwa, H. Funahashi, 1998 .