Peptidome

Biological, individual, and variations between individuals (such as gender, age, and nutrition) affect peptidomes and require careful consideration in order to find valid biomarkers. A few, equally important factors for successful proteomic biomarker research are high sample quality, high sensitivity, and reproducibility that depend on proper selection of the high quality samples. 

Clynen, E., Baggerman, G., Veelaert, D., Cerstiaens, A., Van der Horst, D., Harthoorn, L., Derua, R., Waelkens, E., De Loof, A., Schoofs, L. (2001). Peptidomics of the pars intercerebralis-corpus cardiacum complex of the migratory locust, Locusta migratoria. Eur. J. Biochem. 268, 1929-1939. 

Tammen, H., Schulte, I., Hess, R., Menzel, C., Kellmann, M., Mohring, T., Schulz-Knappe, P. (2005). Peptidomic analysis of human blood specimens comparison between plasma, specimens and serum by differential peptide display. Proteomics 5, 3414-3422. 

Verhaert, P., Uttenweiler-Joseph, S., de Vries, M., Loboda, A., Ens, W., Standing, K.G. (2001). Matrix-assisted laser desorption/ionization quadrupole time-of-flight mass spectrometry an elegant tool for peptidomics. Proteomics 1, 118-131. 

The rapid progress in proteomics and peptidomics during the last decade offers us new possibilities to study clinical aspects of disorders and diseases related to the brain [1], These strategies also offer new tools to follow chemical modifications and altered metabolic disturbances that may be indicative of pathophysiological adaptations related to environmental and psychosocial prolonged stress. These techniques can contribute to developments in the diagnostic and therapeutic fields of psychiatric... 

L. Paulson, R. Persson, G. Karlsson, J. Silberring, A. Bierczynska-Krzysik, R. Ekman, and A. Westman-Brinkmalm. Proteomics and Peptidomics in Neuroscience. Experience of Capabilities and Limitations in a Neurochemical Laboratory. J. Mass Spectrometry, 40(2005) 202-213. 

Biosensors and Modern Biospecific Analytical Techniques Analysis and Detection by Capillary Electrophoresis Proteomics and Peptidomics New Technology Platforms Elucidating Biology... 

Peptidomic research provides access to a huge number of potentially or factually active components which is an invaluable source of peptide dmg leads. The first steps in medically oriented peptidomic studies will be discussed. 

Table 2.1 Objects and short summary of the results of peptidomic studies...

All entries of Table 2.1 belong to samples representing the animal kingdom. In order to demonstrate the generality of peptidome concept we analyzed the extract of Avenasativa oat acrospires [34]. Table 2.2 provides the list of peptides found in that plant as well as their tentative protein precursors. Peptide formation in this case seems somewhat less intensive and on the average the peptides are longer than in animal samples. We consider this result as a proof of peptidome formation in plants. Still peptidomics of plants is apparently in its embryonic state and more results are expected in the near future. Procaryotes are not yet studied for generation of peptide pools. 

Over 300 peptides isolated in our laboratory were studied in one or more tumor or normal cell cultures [39-44]. Part of the results obtained is summarized in Table 2.3. Over 75% of the peptides showed pronounced proliferative or antiproliferative activity in at least one cell type (Fig. 2.3). As a rule, tumor cells are more sensitive to peptide action. Besides the cell type, experimental conditions such as cell density or composition of the culture medium also affected the overall effect. In several cases (13%, Fig. 2.3) even the sign of the effect was peptide concentration dependent. Generally, experiments with cell cultures conform with the view that the main physiological function of cell and tissue peptidomes is control of long term processes and the homeostatic balance (i.e. cell differentiation, proliferation and elimination). The overall effect of peptide pools is achieved by concerted action of total sets of peptides rather than by single components. The molecular mechanisms of peptide action in cells requires concrete study in each individual case and are the subject of current research. 

Peptidom imetic SH2 Domain Antagonists for Targeting Signal Transduction... 

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