[Search for potential gastric cancer biomarkers using low molecular weight blood plasma proteome profiling by mass spectrometry].

Gastric cancer, one of the most widespread malignant tumors, still lacks reliable serum/plasma biomarkers of its early detection. In this study we have developed, unified, and tested a new methodology for search of gastric cancer biomarkers based on profiling of low molecular weight proteome (LMWP) (1-17 kDa). This approach included three main components: sample pre-fractionation, matrix-assisted laser desorption ionization time of flight mass spectrometry (MALDI-TOF-MS), data analysis by a bioinformatics software package.

[Prostate cancer detection using mass-spectrometric profiling of low-molecular weight blood proteome].

Currently, there are no reliable biomarkers of blood plasma for early detection of prostate cancer (PC), a one of the most common malignancies in men. This study developed, universalized and tested a new standardized methodology of detection of prostate cancer biomarkers--profiling of low-molecular weight proteome of blood plasma (1-17 kDa). This approach includes three main components: a preliminary sample preparation, time-of-flight mass spectrometry with an matrix-assisted laser desorption/ionization ALDI-TOF-MS), and the processing of data using bioinformatics software package.

[Production of active oxygen by neutrophils in patients with cancer of the esophagus and stomach before and after surgical interventions].

The state of the oxygen-depended antimicrobial activity of neutrophils on oncologic patients was studied. Production of active oxygen by non-activated and activated neutrophils of peripheral blood from 19 patients (the average age of 56 years, 16 males and 3 females) with esophageal cancer and cancer of the stomach and metastasis to the esophagus was recorded by chemiluminescence before and after surgical interventions (transpleural gastrectomy, Lewis type operation) on the 1st, 3rd and 7th days after the operations. The oxygen-depended antimicrobial activity of the neutrophils was investigated by their ability to produce active oxygen when incubated with opsonized zymosan and N-formyl-methionyl-leucyl-phenylalanine.

[Study of bone tissue structure using polarized Raman spectra].

Polarized Raman spectra of bone tissue were obtained as well as of collagen fibres of the mouse tail tendon and oxyapatite crystals. It is shown that polarized Raman spectra permit to obtain information on spatial orientation of collagen fibres and oxyapatite microcrystals in various parts of the bone tissue. A laser Raman microprobe "Mole" was used to take Raman spectra measurements from the area of several square micrones.