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Biomedical subjects

A Friedrich

Publications and source records attributed to A Friedrich.

At least 91 records · Page 5Linked to original sources
PubMed1979

[Value of the electrophoresis mobility test in the differential diagnosis of obscure kidney findings].

The differential diagnosis of unclear carcinoma-suspicious renal findings often finishes with the test-exposition and nephrectomy. Also when all modern diagnostic possibilities are used not always a clear establishment of the diagnosis may be achieved. The cell electrophoresis mobility test after Field and Caspary may contribute to the differential-diagnostic clarification of the findings, when adequate antigens are used. For this purpose 10 own cases are discussed and these results are compared with suitable comparative groups. Summarizingly by the present study can be shown that the immunologic diagnostics of tumours in the field of unclear renal tumours may be a very good help in the diagnostics. When adequate antigens are used in the cell electrophoresis mobility test a coordination concerning the histospecificity can be achieved.

Adult↗
PubMed1978

Diamine oxidase activity in gastric and duodenal mucosa of man and other mammals with special reference to the pyloric junction.

In the gastric mucosa of human subjects and of various mammals methylation was accepted as the main pathway of histamine catabolism. However, augmentation of gastric acid secretion by aminoguanidine, the strong inhibitor of diamine oxidase, indicated an influence of diamine oxidase activity on this secretory process. Therefore a careful reinvestigation of the occurrence of diamine oxidase activity was started from the distal duodenum in the direction of the cardia. In all species studied, diamine oxidase activity decreased from distal duodenum towards the pylorus. In dogs, landrace pigs and in human subjects the diamine oxidase activity clearly exceeded the pyloric borderline gradually becoming zero in corpus or fundus. In rabbits, however, and especially in mini-pigs no diamine oxidase activity was found beyond the pylorus. Among individuals gastric diamine oxidase activity showed a variable prevalence and could not be found regularly in all the subjects. In one patient with prepyloric ulcer a strong influence of pathophysiological processes on gastric diamine oxidase activity could be suspected. Thus, in every alteration of the gastric mucosa under experimental or clinical conditions also an alteration of gastric diamine oxidase activity should be taken into account.

Aged↗
PubMed1978

A contribution to immunological tumour diagnostics in urology.

Fifty-four patients with malignant and other diseases of the urinary bladder and the prostate were examined for lymphocyte sensitization by means of electrophoretic mobility test (EM test). In this antigens from brain tissue (EF) and from malignomas of kidney, urinary bladder and prostate were used. Positive HEP values were obtained in 40 patients out of 42 with malignant tumours and in 5 patients out of 12 with other kidney diseases. With the corresponding tumour-associated antigens (TAA) in the EM-test, the histological tumour diagnosis could be confirmed in every case. Positive findings after using EF as well as the corresponding TAA are with great probability an indication of a malignant disease.

Adenocarcinoma↗
PubMed1978

[Punch and suction biopsy in the diagnosis of prostatic neoplasms].

133 prostate punch biopsies were examined in histologic way and 90 aspiration biopsies in cytologic way. The histologic and cytologic results of the altogether 116 patients are discussed in connection with the differently tentative findings of rectal palpation. Prostate punch and aspiration biopsies can be used as completion methods in cancer prophylaxis examination. The all-metal needle after Deutschmann (Zittau/GDR) repeatedly to be used for punch biopsy has proved its worth.

Adenocarcinoma↗
PubMed1978

[Course of cellular immunity in urologic neoplasms].

Apart from a purely qualitative evidence concerning the presence of a specific sensibilisation it is possible to estimate also its strength or the blocking factors appearing in the serum of tumour carriers by means of the electrophoresis mobility test. By this it seems to be possible to make an evidence concerning the immunological reaction position of the tumour patient with the possibility to make conclusions as to the prognosis of the patient.

Antigens, Neoplasm↗
PubMed1978

[A contribution to the early diagnosis and differential diagnosis of bladder neoplasms by means of immunological methods].

According to the present examinations it is pretty probable that already in early histological forms of the carcinoma of the urinary bladder the EM-test is able to indicate immunologically malignity, i.e. that the papillary non-infiltrating carcinoma of the transitional cell as well as the carcinoma in situ of the urinary bladder (23) also immunologically behave like tumors of the bladder. In differential-diagnostic questions concerning the organ localisation of the primary tumor the EM-test seems to give valuable references. Histologically not unequivocally malignant tumors of the bladder with positive results in the EM-test should be submitted to an exacter examination and control.

Adult↗
PubMed1977

[Immunodiagnosis of urologic tumors].

In 42 patients with malignant and benign diseases of the kidney, the urinary bladder and the prostate the sensitization of the lymphocytes was investigated in the cell electrophoresis mobility test. In these cases human encephalitogenic protein and tumour-associated antigens from malignomas of kidney, urinary bladder and prostate were used as antigen. When using human encephalitogenic protein 3 "falsely positive" and 2 "falsely negative" results were got, whereas, when using the corresponding tumour-associated antigens in the cell electrophoresis mobility test in every case the histologically ascertained tumour diagnosis could be confirmed.

Adenocarcinoma↗
PubMed1975

Diamine oxydase in rabbit small intestine: separations from a soluble monoamine oxidase, properties and pathophysiological significance in intestinal ischemia.

From all mammals investigated so far only in rabbits diamine oxidase could not be detected in any tissue except the gut. Thus this species was chosen for studying the physiological and pathophysiological function of this enzyme in the gastrointestinal tract. By gel filtration on Sephadex G 50 and G 200 the enzyme was purified 100-fold, separated from a soluble monoamine oxidase, and the properties of the two enzymes were determined. Diamine oxidase from rabbit small intestine deaminated putrecine (Km = 1.3 times 10(-4) M, pH-optimum 6.4-6.9) and histamine (Km = 8 times 10(-5) M, pH-optimum 7.5), but not serotonin, and was inhibited by aminoguanidine, but not by pargyline. Soluble monoamine oxidase from rabbit small intestine catabolized serotonin (Km = 1.8 times 10(-4) M, pH-optimum 8.8) but not putrescine and histamine, and was inhibited by pargyline, but not by aminoguanidine. Based on its properties in vitro intestinal diamine oxidase could inactivate the vasoactive biogenic amine histamine in vivo. To confirm this hypothesis, in rabbits the small intestine was damaged severely by inducing total intestinal ischemia, which occurs as mesenteric infarction also in human subjects and is accompanied by histamine release. Treatment with aminoguanidine and ischemia killed the animals 3-times faster than ischemia alone, which supported our hypothesis on a protective role of intestinal diamine oxidase against histamine.

Animals↗
PubMedDate not supplied

Presence of atrial natriuretic peptide-like material in guinea pig intestine.

Acidic extracts of guinea pig jejunum and colon contain atrial natriuretic peptide-like material (IR-ANP) detected by radioimmunoassay after purification by Sephadex G-50 gel filtration. Immunohistochemical analysis of guinea pig colon also revealed IR-ANP to be located directly beneath the lamina muscularis mucosae. High performance gel permeation chromatography (HP-GPC) and reverse phase high performance chromatography (RP-HPLC) of the IR-ANP showed correspondence to the 15 kD ANP precursor molecule (pro-ANP). No low molecular weight forms of ANP were detected. The extracted pro-ANP could be converted to alpha-ANP-like material by incubation with serum or supernatant of colonic homogenate. These data indicate the intestine to be a further site of ANP synthesis.

Animals↗