title: Non-random tissue distribution of human naïve umbilical cord matrix stem cells.
abstract: OBJECTIVE
  To determine the tissue and temporal distribution of human umbilical cord matrix stem (hUCMS) cells in severe combined immunodeficiency (SCID) mice.
  
  
  METHODS
  For studying the localization of hUCMS cells, tritiated thymidine-labeled hUCMS cells were injected in SCID mice and tissue distribution was quantitatively determined using a liquid scintillation counter at days 1, 3, 7 and 14. Furthermore, an immunofluorescence detection technique was employed in which anti-human mitochondrial antibody was used to identify hUCMS cells in mouse tissues. In order to visualize the distribution of transplanted hUCMS cells in H&E stained tissue sections, India Black ink 4415 was used to label the hUCMS cells.
  
  
  RESULTS
  When tritiated thymidine-labeled hUCMS cells were injected systemically (iv) in female SCID mice, the lung was the major site of accumulation at 24 h after transplantation. With time, the cells migrated to other tissues, and on day three, the spleen, stomach, and small and large intestines were the major accumulation sites. On day seven, a relatively large amount of radioactivity was detected in the adrenal gland, uterus, spleen, lung, and digestive tract. In addition, labeled cells had crossed the blood brain barrier by day 1.
  
  
  CONCLUSIONS
  These results indicate that peripherally injected hUCMS cells distribute quantitatively in a tissue-specific manner throughout the body.
authors: Dharmendra Kumar Maurya, Chiyo Doi, Marla Pyle, Raja Shekar Rachakatla, Masaaki Tamura, Deryl Troyer, Department of Anatomy and Physiology, College of Veterinary Medicine, Kansas State University, Manhattan, KS 66506, United States.
authors: Dharmendra Kumar
authors: DK
authors: Maurya
authors: Chiyo
authors: C
authors: Doi
authors: Marla
authors: M
authors: Pyle
authors: Raja Shekar
authors: RS
authors: Rachakatla
authors: Duane
authors: D
authors: Davis
authors: Masaaki
authors: M
authors: Tamura
authors: Deryl
authors: D
authors: Troyer
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