The aim: to conduct analysis of the accumulation and biodistribution of gold nanoparticles in the structural and functional areas of mesenteric lymph nodes of white rats conducted with regard to the size and duration of the oral administration. The methods of dark field microscopy with Leica DM 2500 microscope were used to assess biodistribution of gold nanoparticle. The histochemical reaction of silver amplification with silver lactate by Danscher was used to confirm its identification. Results: It was found that the gold nanoparticles of 1-3 nm were not detected by these methods in any of the areas of the lymph nodes regardless of the duration of administration, gold nanoparticles of sizes 15 and 50 nm were detected in the form of clusters in the cytoplasm of macrophages and lymphocytes mainly in the mantle zone of lymphoid follicles and brain strands. Conclusion: It was established that the gold nanoparticles of sizes 15 and 50 nm were detected in the form of clusters in the cytoplasm of macrophages and lymphocytes
Olga V. Zlobina, Svetlana S. Pakhomiy, Alla B. Bucharskaya, Irina O. Bugaeva, Galina N. Maslyakova, Nikolai G. Khlebtsov, Boris N. Khlebtsov, Vladimir A. Bogatyrev Accumulation and biodistribution of gold nanoparticles in the mesenteric lymph nodes at oral administration // Russian Open Medical Journal, Vol. 2, Issue 3, 2013, pp. 301-0

The aim of the article is to conduct analysis of accumulation and biodistribution of gold nanoparticles in the structural and functional areas of mesenteric lymph nodes of white rats. Particular attention is paid to the size and duration of oral administration. Material and Methods: Dark field microscopy with Leica DM 2500 microscope has been used to assess biodistribution of gold nanoparticle. The histochemical reaction of silver amplification with silver lactate by Danscher has been used to confirm gold nanoparticles identification. Results: It has been found that regardless of the duration of administration gold nanoparticles of 1-3 nm have not been detected by these methods in the lymph nodes. Gold nanoparticles of 15 and 50 nm have been found out in the form of clusters in the cytoplasm of macrophages and lymphocytes mainly in the mantle zone of lymphoid follicles and brain strands. Conclusion: It has been established that the gold nanoparticles of 15 and 50 nm has been detected in the form of clusters in the cytoplasm of macrophages and lymphocytes.
Zlobina O.V., Pakhomiy S. S., Bucharskaya A.B., Bugaeva I.O., Maslyakova G.N., Khlebtsov N.G., Khlebtsov B.N., Bogatyrev V.A. Analysis of accumulation and biodistribution of gold nanoparticles in mesenteric lymph nodes by oral administration // Saratov Journal of Medical Scientific Research, Vol. 9, Issue 1, 2013, pp. 17-20