Overview of the use of theory to understand infrared and Raman spectra and images of biomolecules: colorectal cancer as an example

Autor(es)

Piva, J. A. A. C. ^[1] ; Silva, J. L. R. ^[1] ; Raniero, L. ^[1] ; Martin, A. A. ^[1] ; Bohr, H. G. ^[2] ; Jalkanen, K. J. ^{[1, 2, 3]}

Afiliação do(s) autor(es)

^[1] Univ Vale Paraiba, UniVaP, Inst Res & Dev, Lab Biomed Vibrat Spect, BR-1244000 Sao Paulo - Brazil

^[2] Tech Univ Denmark, Dept Phys, Quantum Prot Ctr, QuP, DK-2800 Lyngby - Denmark

^[3] German Canc Res Ctr, Div Funct Genome Anal, D-69120 Heidelberg - Germany

• Tipo de documento: Artigo Científico
• Fonte: THEORETICAL CHEMISTRY ACCOUNTS; v. 130, n. 4-6, p. 1261-1273, DEC 2011.
• Citações Web of Science: 11

Resumo

In this work, we present the state of the art in the use of theory (first principles, molecular dynamics, and statistical methods) for interpreting and understanding the infrared (vibrational) absorption and Raman scattering spectra. It is discussed how they can be used in combination with purely experimental studies to generate infrared and Raman images of biomolecules in biologically relevant solutions, including fluids, cells, and both healthy and diseased tissue. The species and conformers of the individual biomolecules are in many cases not stable structures, species, or conformers in the isolated state or in non-polar non-strongly interacting solvents. Hence, it is better to think of the collective behavior of the system. The collective interaction is not the simple sum of the individual parts. Here, we will show that this is also not true for the infrared and Raman spectra and images and that the models used must take this into account. Hence, the use of statistical methods to interpret and understand the infrared and Raman spectra and images from biological tissues, cells, parts of cells, fluids, and even whole organism should change accordingly. As the species, conformers and structures of biomolecules are very sensitive to their environment and aggregation state, the combined use of infrared and Raman spectroscopy and imaging and theoretical simulations are clearly fields, which can benefit from their joint and mutual development. (AU)

• Processo FAPESP: 09/16782-2 - Desenvolvimento de sistema óptico associado à pesquisa de marcadores moleculares para diagnóstico de câncer em tempo real e minimamente invasivo
• Beneficiário: Airton Abrahao Martin
• Modalidade de apoio: Auxílio à Pesquisa - Pesquisador Visitante - Internacional