Saitama Medical University 2 articles published in JoVE Behavior A Common Marmoset Model of Mother-Infant Intervention for Breastfeeding Disorders in the Presence of Paternal Inhibition and Maternal Neglect Mayuko Yoda1,2, Yoshimasa Kamei3, Hayato Sakurai4, Hiroko Kakei4, Ting Tao1,2,4, Hideo Yamanouchi4, Tetsuya Kunikata4, Masanori Hariyama5, Ricki Colman6, Mamiko Koshiba1,4,5 1Graduate School of Sciences and Technology for Innovation, Yamaguchi University, 2Faculty of Health Sciences and Nursing, Juntendo University, 3Obstetrician, Medical Department, Saitama Medical University, 4Department of Pediatrics, Saitama Medical University, 5Graduate School of Information Sciences, Tohoku University, 6Department of Cell and Regenerative Biology and Wisconsin National Primate Research Center, University of Wisconsin, Madison Here, we present a nonhuman primate model of mother-infant intervention for breastfeeding disorders in the presence of paternal inhibition and maternal neglect. The mate model video complements education to support primate and human caregivers with respect to infants with breastfeeding problems such as pain. Developmental Biology Establishment of Proliferative Tetraploid Cells from Nontransformed Human Fibroblasts Susumu Ohshima1, Atsushi Seyama2 1Division of Morphological Science, Biomedical Research Center, Saitama Medical University, 2Department of Pathology, International Medical Center, Saitama Medical University Although proliferative polyploid cells are necessary to analyze chromosomal instability of polyploid cells, creating such cells from nontransformed human cells is not easy. The present report describes relatively simple procedures to establish proliferative tetraploid cells free of a diploid population from normal human fibroblasts.