Tetec Tissue Engineering Technologies Ag

Heinz Walter Joseph

Nicolas Lembert

Methods for in-vitro analysis of biological cells and/or microorganisms to determine characteristics such as: degree of differentiation, cell type, donor individuals, culture conditions, purity, lack of natural characteristic, or additional characteristics in comparison to natural characteristics. The methods include the steps of: (a) projecting infrared radiation on a sample; (b) recording spectral characteristics of the sample; (c) deriving a Fourier transform infrared spectrum (FT-IR) from the collected spectral characteristics; (d) generating a derivative transformation of the FT-IR spectrum; (e) comparing said derivative transformation with a derivative of a reference FT-IR spectrum; (f) identifying deviations of said derivative from said reference derivative; and (g) providing an analysis of said characteristics based on the presence of said deviations. In addition, the invention relates to an apparatus for carrying out the disclosed methods.

Methods and systems for in-vitro analysis of biological cells and/or microorganisms

A method and apparatus for the in vitro determination and typification of well-differentiated or fully differentiated mammalian cells is disclosed. The method comprises placing a cell sample on a sampling device, irradiating the cells with infrared light, preparing an FT-IR spectrum from the absorption spectrum, calculating derivatives of the FT-IR spectrum and comparing the derivatives to reference FT-IR spectra for known cell types. The apparatus comprises an infrared source and measuring apparatus capable of recording an absorption spectrum, and software for measurement, evaluation, documentation, and derivation of the absorption spectra. Fourier transformation he method is particularly useful for typing cells from tissue biopsies in preparation for cell transplantation.

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Freiburg, Germany

Heinz Walter Joseph