Spectral analysis of the porphyrins incorporation into human blood

New Nano-Sized Sensing Drug and Its Clinical Application

Nanomedicine is the application of nanotechnology to the diagnosis and treatment of human disease. This discipline has the potential to change medical science dramatically, for example as demonstrated by an innovation in cancer imaging that uses novel diagnostic agents synthesized from nanoparticles. Some research on cluster-based materials for future medical applications is described in this paper. The design of a multifunctional photosensitive particle that is stable and highly efficient will be key to this novel medical application and especially in photodynamic treatment (PDT). Three consecutive processes occur during the PDT treatment: initial consumption of oxygen through the photodynamic process; pathophysiologic alterations in regional blood supply (hypoxia) and total vascular occlusion (ischemia). The effect of a new drug TiO2/TSPP was studied work. Cancer cells were implanted under the skin of mice to cause tumors. When the size of the tumor grew to about 0.5 cm, it was injected a solution containing fine particles of TiO2/TSPP. After 2 or 3 days, the skin was cut to expose the tumor and irradiated. The treatment clearly inhibited the tumor growth. A further marked antineoplastic effect was obtained.

Sulfonated naphthyl porphyrins as agents against HIV-1

Sulfonated 5,10,15,20-tetra(1-naphthyl)porphyrin (T1NapS) and 5,10,15,20-tetra(2-naphthyl)porphyrin (T2NapS) and their copper and iron chelates show activity against the human immunodeficiency virus (HIV-1). The porphyrins were prepared by sulfonation of the parent structures with sulfuric acid. More highly sulfonated structures were prepared by sulfonation for longer times. Matrix-assisted laser desorption/ionization (MALDI) mass spectrometry showed species with as many as eight sulfonates. Some of the mass spectral peaks for the copper chelates were consistent with loss of water, apparently from intramolecular sulfone formation between two adjacent naphthalene rings that took place during copper insertion. The compounds could be separated using capillary electrophoresis; addition of beta- or gamma-cyclodextrin gave substantially better separation of the components. Activity against HIV was evaluated using an epithelial HeLa-CD4-CCR5 cell line; EC50 values for HIV-1 IIIB and HIV-1 JR-FL ranged from 1 to 15 microg/ml. The compounds exhibit low toxicity for human epithelial cells and have potential as microbicides which might be used to provide protection against sexual transmission of HIV.