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Urological Research

, Volume 24, Issue 2, pp 83–91 | Cite as

Microcalorimetric measurements carried out on isolated tumorous and nontumorous tissue samples from organs in the urogenital tract in comparison to histological and impulse-cytophotometric investigations

  • M. Kallerhoff
  • M. Karnebogen
  • D. Singer
  • A. Dettenbach
  • U. Gralher
  • R. -H. Ringert
Original Paper

Abstract

In this comparative study, microcalorimetric measurements were carried out on a total of 96 tumorous and nontumorous tissue samples taken from organs of the urogenital tract using a thermal activity monitor (TAM). Changes in the heat emission of the tissue samples were measured at 1-min intervals and graphically displayed as a function of time. The aim of the study was to compare the microcalorimetric results with impulse-cytophotometric and histological findings and provide evidence for the metabolic activity of tumorous and nontumorous tissue. In order to obtain the variation in metabolic activity, the maxima (Pmax) of the curves were determined as a value of the maximum thermal power of a tissue sample, the mean values (P) were determined by the mean thermal power and the contour integrals (W) were defined by the behavior of the energy reserves and their mobilization. The first part of the study was carried out to investigate whether tumorous and nontumorous tissue samples differ in general according to their metabolic activity. We discovered, using the parameters described above, that in general tumorous tissue exhibited a higher metabolic activity than nontumorous tissue samples. For example, both W and P in tumorous prostate tissue samples were eightfold higher and the (Pmax) value was 8.4-fold higher than in normal tissue. Additional investigations on testicle and kidney tissues were performed to find a possible correlation between microcalorimetric results and histological grading. We found that an increasing malignancy correlated with a higher metabolic activity of the tissue. Based upon these results were were able to differentiate the various histological gradings of these tumorous tissues by microcalorimetric measurements. The results show it is possible to differentiate between normal and tumorous tissue samples by microcalorimetric measurement based on the distinctly higher metabolic activity of malignant tissue. Furthermore, microcalorimetry allows a differentiation and classification of tissue samples into their histological grading. With the help of microcalorimetry, it might be possible in future to detect and record the metabolic processes of isolated tissue structures and changes in these activities as a result of medical intervention such as cytostatic treatment.

Key words

Microcalorimetry Isolated tissue samples Metabolic activities 

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Copyright information

© Springer-Verlag 1996

Authors and Affiliations

  • M. Kallerhoff
    • 1
  • M. Karnebogen
    • 1
  • D. Singer
    • 2
  • A. Dettenbach
    • 1
  • U. Gralher
    • 1
  • R. -H. Ringert
    • 1
  1. 1.Department of UrologyGeorg-August UniversitätGöttingenGermany
  2. 2.Department of Pediatric MedicineGeorg-August UniversitätGöttingenGermany

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