title: The effect of Kisspeptin-10 on mesenchymal stem cells migration in vitro and in vivo.
abstract: BACKGROUND
  Kisspeptins (kp) activate a receptor coupled to a Gαq subunit (GPR54 or KiSS-1R) receptor to perform a variety of functions, including inhibition of cell motility, chemotaxis, and metastasis. In this study we have investigated whether kp-10, the most potent member of the kisspeptin family, can modulate CXCR4 (C-X-C chemokine receptor type 4) expression and mesenchymal stem cells (MSCs) migration that may influence the development of tumors.
  
  
  METHODS
  We compared the directional migration of MSCs treated with 10-100 or 500 nM kp-10 for 24 hours and no treated cells using an in vitro transmembrane migration assay. In addition, Chloromethylbenzamido Dialkylacarbocyanine (CM-Dil) labeled adipose-derived mesenchymal stem cells treated with 10-100 or 500 nM kp-10 and no treated cells were transfused via the tail vein to the melanoma tumor bearing C57BL/6 mice. After 24 hours, the mice were scarified, the tumors were dissected, and the tumor cell suspensions were analyzed by flow cytometry for detection of CM-Dil(+) MSCs.
  
  
  RESULTS
  We have found that kp-10 increased the MSCs migration at 100 nM, while it decreased the MSCs migration at 500 nM, both in vitro and in vivo, with a significant increase of CXCR4 expression at 100 nM kp-10 compared to the no treated cells, but it had no significant difference between the various concentrations of kp-10.
  
  
  CONCLUSIONS
  Thus, our data showed that kp-10 can differently affect MSCs migration in various concentrations, probably through different effects on CXCR4 expression in various concentrations.
authors.affiliation: Student's Research Centre, Isfahan University of Medical Sciences, Isfahan, Iran ; Physiology Research Centre, Isfahan University of Medical Sciences, Isfahan, Iran.
authors.forename: Fatemeh
authors.initials: F
authors.lastname: Golzar
authors.affiliation: Physiology Research Centre, Isfahan University of Medical Sciences, Isfahan, Iran.
authors.forename: Shaghayegh Haghjooy
authors.initials: SH
authors.lastname: Javanmard
authors.affiliation: Physiology Research Centre, Isfahan University of Medical Sciences, Isfahan, Iran.
authors.forename: Vahid
authors.initials: V
authors.lastname: Bahrambeigi
authors.affiliation: Physiology Research Centre, Isfahan University of Medical Sciences, Isfahan, Iran.
authors.forename: Laleh
authors.initials: L
authors.lastname: Rafiee
keywords: CXCR4; Kisspeptin-10; mesenchymal stem cell; migration