Inhibit angiogenesis is one of the important tumor therapy. If the mechanism of vascular changes can be detected at
molecular level, it will have therapeutic significance. Raman spectroscopy, which can be applied to the structural
analysis of solid, liquid or solution of biological molecules, is a non-destructive spectral technology holding very rich
information. Basing on Confocal Raman Microscope, a unique system is developed for obtaining the different Raman
spectra of the chick embryo vascular with the anti-angiogenic drugs - thalidomide and without. In the study, the
location and shape of the average Raman spectra of vessels in drug 5h were very similar to the ones without medicine,
and the intensity of some characteristic peaks changed, such as 1441cm-1,1527cm-1 and 1657cm-1 showing markedly
increasing, while the 971cm-1 and 1081cm-1 decreasing. This change was due to anti- angiogenic drugs that caused the
nucleic acid, protein, phospholipids, and other important biological molecules of the vessels on the structure or content
tovary. PCA was used to distinguish between the two kinds of vascular with the result that they were accurately
partitioned.The study indicated that Raman spectroscopy could be an effective tool for detection of the mechanism of
vascular changes.
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