Biomedical subjects

C Jarstrand

Publications and source records attributed to C Jarstrand.

At least 109 records · Page 6Linked to original sources

PubMed1980

Granulocyte-function in pancreatitis. Nitroblue tetrazolium-test related to clinical signs of bacterial infection and to hypertriglyceridemia.

Out of 26 patients with acute pancreatitis, 8 had several signs of bacterial infection such as high nitroblue tetrazolium (NBT) reduction of granulocytes, fever, elevated ESR and leukocytosis with granulocytosis. 2 patients had a high NBT-value without all other clinical signs of infection and 6 had such signs without a high NBT-value. --An NBT-value lower than normal was found in 6 patients, 3 of whom also had other signs of infection. The level of serum lipids, determined in only 3 of the 6, demonstrated concomitant hypertriglyceridemia. Hyperlipidemia is known to decrease granulocyte activity and might have prevented a stimulation to increased NBT-reduction otherwise brought about by bacterial infection. Further, 3 of the 6 patients with low NBT-reductions suffered from a very severe type of pancreatitis and two of them developed pneumonia. --Bacterial infection may thus contribute to a severe clinical course of pancreatitis, especially in patients with hypertriglyceridemia in whom the granulocyte function is depressed.

Acute Disease↗

PubMed1979

Decreased chemotactic and random migration of leukocytes during Intralipid infusion.

The soybean oil emulsion Intralipid was given intravenously to 12 healthy subjects for 2 hr. During the infusion an impairment of the chemotactic and random migration of leukocytes was noted. It was correlated to the dose given and to the degree of hypertriglyceridemia induced. Migration was fully restituted 22 hr after the infusion. Also when added in vitro Intralipid caused an impairment of leukocyte motility that followed a dose response pattern.

Adult↗

PubMed1979

The nitroblue tetrazolium (NBT) reduction of neutrophil granulocytes from newborn infants and their mothers in relation to the occurrence of bacteria in amnion fluid and cord blood.

The nitroblue tetrazolium (NBT) reduction of granulocytes from cord blood, when measured without in vitro stimulation with bacteria, was significantly higher than that of maternal granulocytes. This elevated activity may be an adequate response to the presence in cord blood of degradation products from the placenta but also of potentially pathogenic bacteria, found in cord blood of infants with high NBT values. On in vitro stimulation cord blood granulocytes displayed the same high NBT activity as those of the mothers and of healthy non-pregnant women. All but one blood culture from the infants 25--48 h after delivery were sterile. The only child with a low non-stimulated NBT activity of cord blood granulocytes was also the only one presenting a clinical picture of neonatal septicemia, though not bacteriologically verified.

Adult↗

PubMed1979

Nitroblue tetrazolium (NBT) reduction by bacteria. Some properties of the reaction and its possible use.

All the S. albus, E. coli and P. aeruginosa strains examined reduced nitroblue tetrazolium (NBT) to dark blue formazan. The amount of formazan produced was proportional to the number of bacteria. Under the same growth conditions, an equal number of bacteria of various strains produced different amounts of formazan. However, there were statistically verified differences in the NBT-reduction between the three species examined. The NBT-reduction took place in all phases of growth but was most intense in the early logarithmic phase. NBT was found to be toxic for bacteria, and the different strains had varying sensitivity to that effect. The NBT-reaction was markedly enhanced by phenazine methosulphate (PMS). The blue colour of formazan produced from NBT has an advantage over the red colour from triphenyltetrazolium chloride (TTC) if the reaction occurs in the presence of haemoglobin often present in biological materials. With NBT and PMS, 10(6)--10(7) bacteria are needed to form detectable amounts of formazan. The NBT-reduction by bacteria may be useful for measuring the influence of bactericidal, bacteriostatic or growth-stimulating factors on bacteria.

Bacteria↗

PubMed1979

Decreased nitroblue tetrazolium reduction of granulocytes in type IV hyperlipoproteinemia.

NBT reduction of granulocytes was determined in 40 patients with primary hyperlipoproteinemia. The reaction was measured in granulocytes both in the resting state and after stimulation with E. coli, as well as with and without addition of plasma. In 17 patients with type IV hyperlipoproteinemia (endogenous hypertriglyceridemia), the NBT reduction was significantly decreased in all these types of experiments when compared with 12 healthy controls. Sera from hypertriglyceridemic patients decreased NBT reduction of normal granulocytes. Increasing concentration of VLDLs from normolipidemic donors had the same effect. It is suggested that plasma lipoproteins may influence granulocyte function.

Cell Membrane Permeability↗

PubMed1979

Effect of dextran infusion on the phagocytic and metabolic functions of the reticuloendothelial system in man.

The reticuloendothelial system (RES) is part of the host defence and consequently plays an important role in shock and trauma, conditions often requiring volume replacement. Experimental studies have shown that the functions of the RES are hampered by plasma substitutes such as gelatin, starch and dextran. In this study six patients undergoing elective cholecystectomy were given 500 ml dextran just before the operation. At the end of the operation the phagocytic and metabolic functions were tested with microaggregated human serum albumin labelled with I125. The results indicate that there is a significant impairment of the phagocytic activitity of the RES in patients given dextran compared to controls not given dextran but saline. The metabolic activity was not significantly affected by dextran, however, suggesting that moderate dosage of dextran is not of great disadvantage to patients undergoing major surgery.

Cholecystectomy↗

PubMed1979

Human granulocyte function during dextran infusion.

The granulocyte function was determined in healthy persons before and immediately after the infusion of 500 ml of dextran for 4 hours. The nitroblue tetrazolium (NBT) reduction reflecting the metabolic activity of these cells was measured both in cells at rest and after stimulation with E. coli, as well as with and without the addition of plasma. In 13 persons, the NBT-reduction was slightly but significantly increased in all four types of experiments after the dextran infusion. When dextran was added in vitro to granulocytes from normal volunteers, the NBT reduction of these cells was increased and the effect was dose-dependent. A surface effect of dextran together with phagocytosis of dextran molecules are the most probable reasons for the elevated NBT-reduction. - In 9 persons tested, the bactericidal capacity was not significantly influenced by dextran infusion. - When dextran was added in vitro to granulocytes neither the bactericidal capacity nor the chemotactic and random migration of the cells were changed. -

Adult↗

PubMed1979

Role of phagocytic cells in host defence in relation to trauma--a brief review.

Present evidence available support a relationship between phagocytic cell function and survival from various types of trauma, e.g. burn, traumatic shock, and haemorrhage. Both polymorphonuclear phagocytes and mononuclear phagocytes (monocytes and macrophages) participating in the body's host defence are of crucial importance in preventing post-traumatic infections by microorganisms. The role of macrophages constituting the reticuloendothelial system (RES) in relation to trauma is paid special attention in this review. Deficit in a humoral opsonic glycoprotein (alpha 2 SB glycoprotein) important for reticuloendothelial phagocytosis is described in various types of traumatic injuries, and the role of RES in relation to pulmonary insufficiency is finally summarized.

Animals↗

PubMed1978

Granulocytic function after administration of pepsin treated human gammaglobulin.

Pepsin-treated human gammaglobulin, 150 mg/kg body weight, was administered intravenously to 14 healthy volunteers. Before and after the infusion the nitroblue tetrazolium (NBT)-reduction of granulocytes was studied in all and the bactericidial capacity in 12 subjects. An increase of NBT reduction (p less than 0.05) and of bacterial capacity (p less than 0.01) of granulocytes was found after the infusion. The effects may be due to an opsonising action of F (ab')2 components.

Adult↗

PubMed1978

Alveolar macrophage function in nickel dust exposed rabbits.

8 rabbits were exposed to metallic nickel dust (2 mg/m3, of which about half was respirable) for 4 weeks. The lungs were lavaged and the macrophages were collected. In comparison with 8 control rabbits, a significant increase was noted in the nickel exposed rabbits as concerned the weight and density of the lungs, the size variation of the lung cells, the phagocytosis of silver coated particles, and the metabolic activity as measured by NBT reduction. The last mentioned increase was recorded during basal conditions as well as during phagocytosis. The NBT reduction during phagocytosis was significantly correlated with the degree of phagocytosis of silver coated particles in both control and exposed rabbits. It is suggested that the exposure to nickel dust has unspecifically activated the macrophages perhaps by increased production of phospholipids.

Animals↗

PubMed1978

Nitroblue tetrazolium (NBT) reduction by bacteria employed for rapid determination of antibiotic concentrations in serum.

The ability of bacteria to reduce nitroblue tetrazolium (NBT) to formazan, and the inhibition of this process by antibiotics, have been utilized in a method to determine antibiotic concentrations in serum. Escherichia coli, growing in the presence of increasing but subinhibitory concentrations of antibiotics, produces diminished amounts of formazan. This is photometrically quantified and the optical density obtained with the sample is compared with those obtained with know concentrations. Levels of aminoglycosides below 1 microgram/ml can be measured in the presence of other antibiotics also, and the assay can be carried out in three hours. Good correlation was obtained when 49 serum samples containing varying concentrations of sisomicin were tested simultaneously by the NBT assay and a disc diffusion method.

Aminoglycosides↗

PubMed1978

Human granulocyte and reticuloendothelial system function during intralipid infusion.

In six patients, the phagocytic and catabolic functions of the RES (reticuloendothelial system), as measured by using 125I-microaggregated human serum albumin as a test substance, were not affected by Intralipid infusion. The nitroblue tetrazolium (NBT) reduction of granulocytes, the NBT reduction and the bacplasma, was significantly lower in eight patients during Intralipid infusion than before this treatment. When heat-killed E. coli were added for phagocytic stimulation in vitro, the same result was obtained only in the absence of plasma. The bactericidal capacity of granulocytes was significantly decreased in six patients during Intralipid infusion. When Intralipid was added in vitro to granulocytes, the NBT reduction, and the bactericidal capacity of these cells were decreased and the effect was mainly dose-dependent. Electron micrographs show that granulocytes phagocytize Intralipid. The loading of granulocytes with lipid particles may block the engulfment of bacteria and may be a reason for the decreased bactericidal capacity of these cells. An influence exerted by the lipid on the cell membrane is the most conceivable reason for the decreased NBT reduction.

Adult↗

PubMed1978

Tracheobronchial clearance 5-15 months after infection with Mycoplasma pneumoniae.

Tracheobronchial clearance was studied in 17 non-smokers who had suffered from a serologically verified Mycoplasma pneumoniae pneumonia 5-15 months earlier. The subjects inhaled 6 micron teflon particles tagged with 99mTc. The retention of the particles in the lungs was measured for 2 h. The retention after 2 h in this group was significantly higher than in a control group of healthy non-smokers. The results suggest that some impairment persists 5-15 months after the infection or that persons with slow clearance contract a mycoplasma pneumonia more easily than do those with fast clearance.

Adolescent↗

PubMed1978

The value of immunoelectroosmophoresis (IEOP) for etiological diagnosis of acute respiratory tract infections due to pneumococci and Mycoplasma pneumoniae.

Immunoelectroosmophoresis (IEOP) has been used to detect pneumococcal and Mycoplasma pneumoniae antigen in 324 sputum samples from 224 patients. Pneumococcal antigen was found in 30/37 samples from which pneumococci had earlier been isolated and in 72/243 specimens where they had not been found. Of these 72 samples 69 were from patients treated with antibiotics. Mycoplasma antigen was found in 9/57 sputum samples from which Mycoplasma had been isolated and in 2/32 other samples from patients with a serologically verified diagnosis of mycoplasmal infection. As to pneumococci, the IEOP is of value because of its rapidity and especially because antigen findings can be made in patients treated with antibiotics. In spite of sonication and concentration, mycoplasma antigen was too rarely found for the method, as now carried out, to be useful in diagnostic work.

Anti-Bacterial Agents↗

PubMed1978

Phagocyte function in various situations in surgery.

A brief presentation is given of granulocyte physiology, as well as some techniques in use for assessing the adherance, the migration, the uptake and bacterial killing and finally the metabolic activity of these cells. Also the activities of the reticuloendothelial system and an in vivo method to measure the phagocytic and metabolic function of macrophages are described. A change, most often a decrease, in phagocytic function has been noted in several circumstances common in surgical practice. So is the case after open heart surgery, during infusion with colloids for blood replacement, and during treatment with immunosuppressive drugs. Further, various forms of malnutrition, such as total starvation, obesity and the hypertriglyceridemia following excessive infusion of fat emulsions may impair granulocyte function.

Cell Movement↗

PubMed1977

Peripheral blood lymphocyte populations in influenza patients.

The peripheral blood lymphocyte populations were determined in 10 patients during the acute phase of influenza and 6-8 weeks after recovery. The percentage of T-lymphocytes, demonstrated by their binding sheep erythrocytes non-specifically (E-rosette forming cells), was decreased during influenza. A relative and absolute increase of non-T-lymphocytes could be shown by the determination on these cells of receptors for activiated C'3 (EAC-rosette forming cells).

Acute Disease↗

PubMed1977

The NBT (Nitroblue Tetrazolium) activity of neutrophil granulocytes in patients with influenza A infection.

The NBT activity of granulocytes from 11 influenza patients was determined during the acute stage of the disease and 6-8 weeks after recovery. The NBT activity was generally higher during influenza than after recovery. In the presence as well as in the absence of the patient's serum the differences were significant both without and with Escherichia coli stimulation.

Acute Disease↗

PubMed1977

Immunologic investigation in children with recurrent pneumonia.

In vitro lymphocyte stimulation by phytohemagglutinin (PHA) and pokeweed mitogen (PWM) and tests for granulocyte function were performed in 12 children with recurrent pneumonia. Reduced lymphocyte stimulation was found at repeated tests in 2 children and transiently decreased lymphocyte stimulation in 6 more children. In 3 patients, reduced bactericidal capacity of granulocytes was demonstrated, and in 1 cast stimulation showed decreased NBT activity of granulocytes. One patient examined had immunoglobulin deficiency.

Adolescent↗