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Biomedical subjects

S Henningsson

Publications and source records attributed to S Henningsson.

34 records · Page 2Linked to original sources
PubMed1979

Formation of cadaverine in the pregnant rat.

The formation as well as the content of cadaverine were determined in different tissues of pregnant and non-pregnant rats. The placenta and ovary were most potent in the ability to form cadaverine. To our knowledge this is the first report of an in vitro formation of cadaverine linked to a normal physiological process, i.e. pregnancy. The highest concentration of cadaverine was found in the placenta and ovary of the pregnant rat. Treatment with aminoguanidine generally elevated the content of cadaverine, indicating a role of diamine oxidase as a regulator of diamine content.

Amine Oxidase (Copper-Containing)↗
PubMed1979

Effects of 1,3-diaminopropane on testosterone induced hypertrophy and polyamine synthesis in mouse kidney.

The effects of prolonged treatment with 1,3-diaminopropane, a structural analogue of putrescine, on polyamine metabolism and growth in kidney tissue, were studied in mice in which renal hypertrophy was induced by testosterone treatment. Injections of 1,3-diaminopropane resulted in an almost total suppression of the testosterone induced stimulation of ornithine decarboxylase activity and prevented the accumulation of putrescine and spermidine in the kidneys. Renal spermine concentration was even lowered. Administration of 1,3-diaminopropane effectively prevented the testosterone induced increase in renal weight and RNA. In mice receiving 1,3-diaminopropane proteinuria was observed and histological examination revealed renal damage. Due to the nephrotoxic action of 1,3-diaminopropane caution is essential in relating the prevention of renal hypertrophy and the inhibition of polyamine synthesis.

Adenosylmethionine Decarboxylase↗
PubMed1978

Aspects on diamine oxidase activity and its determination.

Homogenate of guinea-pig liver and human placenta, tissues known to be rich in diamine oxidase, were incubated with 14C-putrescine and the metabolites formed were determined. In the incubate of guinea-pig liver, the major metabolites were GABA and some unidentified compound(s); delta1-pyrroline and 14CO2 were also obtained. In both the maternal and fetal parts of human placenta, radioactive GABA and the unidentified compound(s) as well as delta1-pyrroline were found. The results indicate that GABA is an important intermediate in putrescine metabolism. Determination of the amount of delta1-pyrroline is thus not well suited as a measure of the diamine oxidase activity in tissues.

Amine Oxidase (Copper-Containing)↗
PubMed1978

Polyamines and nucleic acids in the mouse kidney induced to growth by testosterone propionate.

Daily injections of testosterone propionate to castrated mice resulted in a striking increase in kidney weight. Renal putrescine rose sharply and the amounts of spermidine were also increased. The activity or ornithine decarboxylase was enhanced to values of more than 1 000 times the control level within a few days of testosterone substitution. A moderate and temporary increase in the activity of the putrescine-activated S-adenosyl-L-methionine decarboxylase was observed. Testosterone injections produced a large increase of renal RNA but only a minor change in DNA. It is apparent that in mice distinct alterations in polyamine metabolism occur during the development of renal hypertrophy induced by testosterone administration.

Adenosylmethionine Decarboxylase↗
PubMed1978

Increased formation of diamines and polyamines in the pregnant rat.

1. The urinary excretion of histamine, methylhistamine, putrescine, cadaverine, spermidine and spermine was examined before, during and after pregnancy in rats. 2. During the last third of undisturbed pregnancy a distinct and steep rise occurred in the excretion of all amines studied except spermine. The peak values were found a few days before the birth of the young. In spermidine excretion a second peak was observed one or two days after delivery. 3. Before and during the first 2 weeks of gestation on a molar basis putrescine excretion was the greatest one. During the last trimester histamine was excreted in the largest amount. 4. Under the influence of the diamine oxidase inhibitor aminoguanidine the general pattern of excretion of diamines and polyamines in pregnant rats remained essentially unchanged but the total amount excreted increased. Most conspicuous was the great elevation of urinary contents of putrescine and cadaverine.

Animals↗
PubMed1976

Diamines and polyamines in DMBA-induced breast carcinoma containing mast cells resistant to compound 48/80.

In female rats, mammary carcinoma were induced by DMBA (7,12-dimethylbenz(alpha)anthracene) administration. The activities of histidine and ornithine decarboxylases and the concentrations of histamine, putrescine and polyamines were determined in tumour extracts and urine. In the tumour tissue, formation of histamine and putrescine took place at much higher rates than in normal mammary tissue. Administration of compound 48/80 in doses that mobilized about 70% of histamine contained in the ear failed to release histamine contained in the tumour; 48/80 also failed to produce histological signs of degranulation of the tumour mast cells. It thus appears that these cells are different from mast cells in most normal tissues, a distinction that calls for further study.

Animals↗
PubMed1976

The effect of nandrolone, an anabolic steroid on putrescine metabolism in the mouse.

1 The catabolism of injected 14 C-putrescine was studied in mice treated with nandrolone phenpropionate, an anabolic steroid. 2 The putrescine was rapidly metabolized; almost 50% of the injected radioactivity was recovered within 2 h as 14 CO2 in the expired air. 3 Considerable amounts of radioactive gamma-aminobutyric acid (GABA) and an unidentified compound were found in the kidney and in the urine in addition to radioactive putrescine, spermidine and spermine both in controls and nandrolone-treated mice. 4 Nandrolone elevated the concentration of endogenous putrescine in the kidney and urine, eightfold and twentyfold, respectively, and the concentrations of spermidine and spermine were also increased 5 after the injection of 14C-putrescine the incorporation of 14C into spermidine was significantly increased in the kidney of mice receiving nandrolone.

Animals↗
PubMed1976

Biosynthesis of cadaverine in mice under the influence of an anabolic steroid.

The content of cadaverine (1,5-diaminopentane) in the kidney and urine was investigated in mice treated with the anabolic steroid Durabolin (nondrolone phenpropionate). After administration of this steroid cadaverine was found in the kidneys, whereas this amine could not be detected in the kidney of controls. The urinary excretion of cadaverine was elevated 50 times after Durabolin administration. An enzyme catalyzing the formation of cadaverine from lysine was shown for the first time to be present in mammalian tissue, namely in the kidney of mice after Durabolin administration.

Animals↗
PubMed1976

Histamine metabolism of the guinea-pig gastric mucosa.

1. The mobilization of gastric mucosal histamine as reflected by changes in formation and content has been studied in guinea-pigs on feeding and after injections of pentagastrin or 2-deoxy-D-glucose. 2. Re-feeding fasting guinea-pigs as well as injections of pentagastrin or 2-deoxy-D-glucose raised the rate of mucosal histamine formation; pentagastrin induced a fourfold rise. 3. Some properties of the enzyme catalysing the formation of histamine were examined. The results indicated that this enzyme is histidine decarboxylase, L-histidine carboxy-lyase, E.C. 4.1.1. 22. 4. The enzyme imidazole-N-methyl transferase, E.C. 2.1.1.8, which carries out methylation of the imidazole ring to yield 1-methyl-4-(beta-aminoethyl)imidazole (methylhistamine), was found in high amounts in the mucosa. The enzyme did not change upon stimulation of the mucosa. 5. The metabolism of histamine within the gastric mucosa is discussed in relationship to a suggested role of the amine in exciting acid secretion.

Animals↗
PubMed1975

Biosynthesis of histamine and putrescine in mice during post-natal development and its hormone dependence.

1. Histidine decarboxylase and ornithine decarboxylase activities were determined in mouse kidney and liver during post-natal development. 2. The content of histamine, putrescine, spermidine and spermine was examined in kidney and liver and in the urine of adult male and female mice. 3. Histamine formation by the kidney was high in both sexes when determined a few days after birth but decreased during weaning. Thereafter, a distinct sex difference was established in that in the female kidney the level of histidine decarboxylase rose several-fold during adolescence while in the male the level was still further reduced. 4. Putrescine formation by mouse kidney was low in both sexes up to three weeks of age whereafter the amine formation in the male increased conspicuously whereas that of the female kidney remained low. 5. The observed sex differences in tissue enzyme activities were reflected in concomitant differences in the amount of the diamines excreted in the urine. 6. No correlation was found between the actual enzyme levels and the assayed tissue content of histamine, putrescine, spermidine and spermine. 7. Following gonadectomy, the activities of both decarboxylases were significantly altered. Ornithine decarboxylase activity of male kidney and histidine decarboxylase activity of female kidney were strikingly reduced. 8. In the mouse liver, the two decarboxylases displayed no changes comparable with that of the kidney during development.

Age Factors↗