Abstract
Interstitial fluid was sampled from rats by subcutaneously implanted diffusion chambers and analyzed for calcium, inorganic phosphate and protein. The ultrafiltrable fractions of calcium and inorganic phosphate in the interstitial fluid were estimated by a dialyzing chamber implanted in the same way. The concentration of total calcium in the interstitial fluid was found to be 8.80 mg/100 ml, or 12% lower than in serum from the same animals. The concentration of inorganic phosphate was found to be 16% lower than serum-P. The ultrafiltrable fractions of calcium and inorganic phosphate in the interstitial fluid were found to be 71% and 92% of total Ca and P respectively. The concentration of protein in the interstitial fluid was about 62% of the serum protein value, and thus considerably higher than the commonly accepted values. The disc electrophoretic pattern of the interstitial fluid protein showed only minor quantitative differences from that of serum.
Résumé
Du liquide interstitiel de rats, prélevé à l'aide de chambres de diffusions implantées dans la région sous-cutanée, est analysé en calcium, phosphate inorganique et protéine. Les fractions ultra-filtrables de calcium et de phosphate inorganique sont déterminées à l'aide de chambres de dialyse implantées de façon similaire. La concentration en calcium total du liquide interstitiel est de 8.80 mg/100 ml, soit 12% inférieure que celle du sérum des mêmes animaux. La concentration du phosphate inorganique est de 16% inférieure que le P sérique. Les fractions ultra-filtrables de calcium et de phosphate inorganique du liquide interstitiel est respectivement de 71% et 92% du calcium total et du P. La concentration en protéine du liquide interstitiel est environ 62% de la valeur en protéine sérique et, par suite, nettement plus élevée que les valeurs généralement acceptées. La distribution en protéine du liquide interstitiel, aprés électrophorèse sur disque, ne montre que de faibles différences avec celle du sérum.
Zusammenfassung
Es wurden Proben von interstitieller Flüssigkeit von Ratten mittels subcutan implantierten Diffusionskammern entnommen und auf Calcium, anorganisches Phosphat und Protein untersucht. Die ultrafiltriebaren Fraktionen von Calcium und anorganischem Phosphat in der interstitiellen Flüssigkeit wurden mittels einer Dialyse-Kammer bestimmt, welche auf gleiche Weise implantiert wurde. Die Konzentration des gesamten Calciums in der interstitiellen Flüssigkeit war 8,80 mg/100 ml, d.h. 12% niedriger als im Serum der gleichen Tiere. Die Konzentration von anorganischem Phosphat war 16% niedriger als Serum-P. Die ultrafiltrierbaren Fraktionen von Calcium und anorganischem Phosphat in der interstitiellen Flüssigkeit waren 71 bzw. 92% des gesamten Ca und P. Die Konzentration von Protein in der interstitiellen Flüssigkeit war etwa 62% des Serumproteinwertes, also beträchtlich höher als die allgemein angenommenen Werte. Das Disc-Elektrophoresemuster von Protein in der interstitiellen Flüssigkeit zeigte nur geringe quantitative Unterschiede zu demjenigen im Serum.
Similar content being viewed by others
References
Algire, G. H., Weaver, J. M., Prehn, R. T.: Growth of cellsin vivo in diffusion chambers. I. Survival of homografts in immunized mice. J. nat. Cancer Inst.15, 493–501 (1954).
———: Part IV. Lymphocytes, Lymph nodes, and homotransplantation. Studies on tissue homotransplantation in mice, using diffusion-chamber methods. Ann. N.Y. Acad. Sci.64, 1009–1013 (1957).
Bell, G. H., Davidson, J. N., Scarborough, H.: Textbook of physiology and biochemistry, 7th ed., p. 749. Edinburgh and London: E.S. Livingstone 1968.
Bianchi, C. P.: Cell calcium. London: Butterworths 1968.
Bronner, F.: Dynamics and function of calcium. In: Mineral metabolism (C. L. Comar and F. Bronner, eds.), vol. 2, part A, p. 341–444. New York and London: Academic Press 1964.
Creese, R., D'Silva, J. L., Shaw, D. M.: Interfibre fluid from guinea-pig muscle. J. Physiol. (Lond.)162, 44–53 (1962).
Fiske, C., Subbarow, Y.: The colorimetric determination of phosphorus. J. biol. Chem.66, 375–400 (1925).
Guillino, P. M., Clark, S. H., Grantham, F. H.: The interstitial fluid of solid tumors. Cancer Res.24, 780–797 (1964).
Guyton, A. C.: Function of the human body, 3rd ed., p. 185. Philadelphia-London-Toronto: W. B. Saunders Company 1969.
Howell, D. S., Pita, J. C., Marquez, J. F., Madruga, J. E.: Partition of calcium, phosphate, and protein in the fluid phase aspirated at calcifying sites in epiphyseal cartilage. J. clin. Invest.47, 1121–1132 (1968).
Leeuwen, A. M. van, Thomasse, C. M., Kapteyn, P. C.: The determination of protein-bound calcium and magnesium by ultrafiltrationin vivo. Clin. chim. Acta6, 550–565 (1961).
Mancini, R. E.: Connective tissue and serum proteins. Int. Rev. Cytol.14, 193–222 (1963).
Maurer, F. W.: Isolation and analysis of extracellular muscle fluid from frogs. Amer. J. Physiol.124, 546–557 (1938).
McLean, F. C., Urist, M. R.: Bone. Fundamentals of the physiology of skeletal tissue, 3rd ed. p. 153. Chicago and London: Chicago University Press 1968.
Neuman, W. F., Neuman, M. W.: The chemical dynamics of bone mineral, p. 38. Chicago and London: Chicago University Press 1958.
Robertson, W. G., Peacock, M.: New techniques for the separation and measurement of the calcium fractions of normal human serum. Clin. chim. Acta20, 315–326 (1968).
Rutter, W. J.: Protein determination in embryos. In: Methods in developmental biology (F. H. Wilt and N. K. Wessell, eds.), p. 671–683. New York: Thomas Y. Crowell Comp. 1967.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Rasmussen, P. The concentration of calcium, inorganic phosphate and protein in the interstitial fluid of rats. Calc. Tis Res. 6, 197–203 (1970). https://doi.org/10.1007/BF02196200
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF02196200