Salivary gland enlargement as a test for a new way of permanent isoproterenol application

Klingenberg, H. G.; Porta, S.; Egger, G.; Sadjak, A.; Geschwinder, I.

doi:10.1007/bf01918861

Cited by 5 publications

(1 citation statement)

References 3 publications

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“…The 'starting point of this work was a technique for the prolonged administration of water-soluble substances [1][2][3][4]. Further development was undertaken with the purpose of devising a method for the simultaneous measurement of inulin and PAH clearances in unanaesthetized laboratory animals (rats), which were free to move about within their metabolism cages.…”

Section: Part 1 Introductionmentioning

confidence: 99%

A new method for determining inulin and PAH clearances in the conscious rat—Fundamentals of the method1 (part 1) with examples of its application in artificially induced renal damage2 (part 2)

Sadjak

Leimüller

Vogel³

et al. 1979

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A new method has been developed for the simultaneous measurement of inulin and PAH clearance in small laboratory animals (rats). A double-chambered Teflon capsule (capacity: 3 ml) is implanted intraperltuneally. One of the chambers is filled with inulin solution and the other with PAH solution. Both solutions are iso-osmotie. The open ends of the capsule are sealed with double dialysis membranes. Sufficiently high serum and urine levels of both substances can thus be maintained for 72 h. By adapting suitable methods, it proved possible to estimate inulin and PAH in 500 #1 of blood or urine. The advantage of the method is that it can be used for renal clearance tests in small conscious animals, able to move freely within their cages without anaesthesia or intravenous infusions.The feasibility of the technique was tested by monitoring the behaviour of various parameters of renal function after administration of the following nephrotoxic agents: puromycin aminonucleoside, 100 mg/kg s.c.; uranyl nitrate, 2 mg/kg s.c.; mercuric chloride, I mg/kg i.p. The following factors were measured or calculated: urine output, GFR, fractional water reabsorption, PAH clearance, serum urea concentration and clearance, reabsorbed/secreted urea (percentage of filtered urea), Na + clearance and fractional Na + reabsorption, urine glucose concentration, glucose clearance and fractional reabsorption, and urine protein concentration. After the dose of aminonucleoslde there was a significant rise in plasma urea together with significant protelnuria reaching their peak on the eighth day. Uranyl nitrate poisoning caused an approximately 25% reduction in GFR, a drastic reduction in PAH clearance, a definite rise in plasma urea and a reduction in fractional glucose reabsorption from 99 to 55%, all these changes reaching their maximum on the sixth day. After mercuric chloride poisoning the changes reached their peak on the third day; GFR was reduced by approximately 60% and at the same time fractional water reabsorption fell from 97 to 90%. PAH clearance was reduced to 25% of normal and urea concentration rose to 231 mg/100 ml -an extremely high level. Fractional glucose reabsorption was 70.9~ as Part of this work was presented at the 18th and 19th Spring Meetings of the German Pharmacological Society in Mainz, 1977 and1978. compared with 99.7% in the controls. From these results it is apparent that the renal lesion induced by aminonueleoside is situated exclusively in the glomeruli, while the damage caused by uranyl acetate is entirely or almost entirely eonfined to the tubules. The nephrotoxle action of mercuric chlorlde involves both glomerular and tubular functions. However, such an interpretation disregards the fact, established by histological examination, that in mercuric chloride poisoning a large proportion of the proximal tubuli are consistently blocked with cell debris. Under the light microscope the glomerull appear to be intact so that the reduction in GFR cannot be ascribed to glomerular damage, but must be the result of ...

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Section: Part 1 Introductionmentioning

confidence: 99%

A new method for determining inulin and PAH clearances in the conscious rat—Fundamentals of the method1 (part 1) with examples of its application in artificially induced renal damage2 (part 2)

Sadjak

Leimüller

Vogel³

et al. 1979

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Permanent isoproterenol application from an intraperitoneal depot capsule — effects on the heart

Klingenberg

Porta

Egger

et al. 1977

Experimentelle Pathologie

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The influence of a permanent Isoproterenol (ISO) application on the dynamics of the Sephadex inflammation

Egger¹,

Porta²

1979

Experimentelle Pathologie

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Salivary gland enlargement as a test for a new way of permanent isoproterenol application

Abstract: Low doses of isoproterenol, given permanently by a new application-method, show the same effects on salivary-gland enlargement of rats throughout approx. 6 days than 10fold higher concentrations given by previous workers as single daily injections.

Cited by 5 publications

References 3 publications

A new method for determining inulin and PAH clearances in the conscious rat—Fundamentals of the method1 (part 1) with examples of its application in artificially induced renal damage2 (part 2)

A new method for determining inulin and PAH clearances in the conscious rat—Fundamentals of the method1 (part 1) with examples of its application in artificially induced renal damage2 (part 2)

Permanent isoproterenol application from an intraperitoneal depot capsule — effects on the heart

The influence of a permanent Isoproterenol (ISO) application on the dynamics of the Sephadex inflammation

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