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. 2016 Jul 13;11(7):e0158967. doi: 10.1371/journal.pone.0158967

Fig 4. Submucosal injection as a pancolonic delivery of siRNA in mouse colon.

Fig 4

(A) Retention of FAM-labeled CHST15 siRNA within the submucosa of the normal mouse colon by differential interference contrast microscopy. Arrow indicated the site of injection. FAM-positive cells were clearly detected at higher magnifications (open squares). Original magnification, x100. (B) Diffusion of FAM-labeled siRNA in the whole normal mouse colon by stereoscopic microscopy. Lower panel showed fluorescence signals. Arrow indicated the site of injection. Non-injected colon was placed as a negative control. Original magnification, x7.3. (C) Concentrations of CHST15 siRNA in the normal mouse colon 4, 24, 48 and 144 h after a single submucosal injection.