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https://www.selleckchem.com/mTOR.html The current study aims to evaluate the dependence of laser-induced optical breakdown (LIOB) on skin types by using 1064 nm picosecond laser with micro-lens arrays (MLA) and diffractive optical elements (DOE). Both black and white skin tissues were examined to comparatively assess the LIOB effects in the skin in terms of laser-induced vacuolization. The black skin irradiated at 3.0 J/cm2 demonstrated that MLA yielded a deeper distribution (180-400 μm) of laser-induced vacuoles with a size of 67 μm, compared to DOE (180-280 μm; 40 μm in size). However, the white skin presented that MLA created larger vacuoles (134 μm in size) in a smaller number at deeper distributions (125-700 μm) than MLA with the black skin. DOE generated no laser-induced vacuolization in the white skin. The white skin tissue with inherent higher scattering could be responsible for deeper vacuolization after the picosecond laser treatment. Further investigations are expected to determine the optimal treatment conditions for various skin types.The precise accumulation and extended retention of nanomedicines in the tumor tissue has been highly desired for cancer therapy. Here a novel supramolecular-peptide derived nanodrug (SPN) that can be transformed to microfibers in response to intracellular polyamine in cancer cells for significantly enhanced tumor specific accumulation and retention is developed. The supramolecular-peptide is constructed via the non-covalent interactions between cucurbit[7]uril (CB[7]) and Phe on Phe-Phe-Val-Leu-Lys-camptothecin conjugates (FFVLK-CPT, PC). The resultant amphiphilic supramolecular complex subsequently self-assembles into nanoparticles with a hydrodynamic diameter of 164.2 ± 3.7 nm. Upon internalization into spermine-overexpressed cancer cells, the CB[7]-Phe host-guest pairs can be competitively dissociated by spermine and can release free PC, which immediately form β-sheet structures and subsequently reorganize into microfib

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