WEAK COMBINED MAGNETIC FIELDS ADJUSTED TO THE PARAMETRIC RESONANCE FOR Ca2+ INTENSIFY DYSTROPHIN SYNTHESIS IN MDX MICE
SKELETAL MUSCLES AFTER CELL THERAPY
A.V. Sokolova,1,* G.V. Sokolov,2 V.M. Mikhailov 1
1 Institute of Cytology RAS, St. Petersburg, 194064, and
2 Krylov State Research Centre, St. Petersburg, 196159;
* e-mail: avsokolova@inbox.ru
The mdx mice are an X-linked myopathic mutants, an animal model for human Duchenne muscular dystrophy (DMD). Mdx mice muscles are characterized by high level of
striated muscle fibers (SMF) death followed by regeneration. As a result most SMFs of mdx mice have centrally located nuclei. The possibility of using stem cells therapy for the
correction of DMD is actively being studied. One of the approaches to the usage of bone marrow stem cells for cellular therapy of DMD is the replacement of bone marrow after
irradiation by X-rays. This method however does not give significant increase of dystrophin synthesis in mdx mice muscles fibers. We have tried to affect the mice after bone
marrow transplantation by weak combined magnetic fields adjusted to the parametric resonance for Ca2+(Na2+-MF) based on the data that the weak
combined magnetic fields influence on tissues regeneration. We observed a significant increase in the proportion of dystrophin-positive SMFs in group of mdx mice radiation chimera
5 Gy and 3 Gy which was additionally exposed in Na2+-MF in comparison with the control mdx mice and the group of mdx mice radiation chimera 5 Gy and 3 Gy which
was kept in terrestrial magnetic field 2 months after chimera preparation - up to 15.8 and 18.3 %, respectively. Also, there was an accumulation of SMFs without central nuclei.
These data indicate a significanly increased efficacy of cell therapy in the case of additional exposition in Na2+-MF. Thus, the efficiency of bone marrow transplantation
mdx mice after both in doses 3 and 5 Gy was considerably enhanced by additional exposition to Na2+-MF. Apparently, such magnetic field can intensify functioning of
donor's nuclei which had been incorporated into muscle fibers.
Key words:
mdx mice, dystrophin, bone marrow stem cells, weak combined magnetic fields adjusted to the parametric resonance for Ca2+
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