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Biomedical subjects

P Lind

Publications and source records attributed to P Lind.

At least 199 records · Page 11Linked to original sources
PubMed1991

The immunoscintigraphic use of Tc-99m-labelled monoclonal anti-CEA antibodies (BW 431/26) in patients with suspected primary, recurrent and metastatic breast cancer.

The discrepancy between serum CEA levels and CEA tissue expression in patients with breast cancer is well known. Whereas immunohistochemistry shows positive CEA expression in 70-90%, the serum CEA levels are often within the normal range. We performed immunoscintigraphy and SPECT with a Tc-99m labelled anti-CEA monoclonal antibody (MAb BW 431/26) in 46 women with suspected breast cancer or recurrence. The results of anti-CEA immunoscintigraphy, mammography, serum CEA levels and immunohistochemistry were evaluated according to the histology of the tumor. Histology verified breast cancer or recurrence (pT1 [n = 7], pT2 [n = 17], pT3 [n = 3], pT4 [n = 3]) in 30 out of 46 patients; benign breast disease such as fibrocystic disease, fibroadenoma, fatty necrosis or chronic mastitis was responsible for suspicious mammographic findings in 16 patients. Immuno-SPECT showed 25 true-positive, 5 false-negative, 11 true-negative and 5 false-positive findings (sensitivity 83%, specificity 69%). Anti-CEA immuno-SPECT of 2 patients with bone metastasis showed all lesions previously detected by bone scintigraphy to be CEA-expressing metastases. In contrast, serum CEA levels were slightly elevated in only 5 out of 30 patients with histologically verified breast cancer (sensitivity 17%). The results of immuno-histochemistry were surprising; tissue CEA expression could be demonstrated in only 5 patients with breast cancer. According to our experiences with this Tc-99m labelled anti-CEA MAb, immuno-SPECT is a suitable additional method for the diagnosis of breast cancer and especially of recurrence. Pre-operative serum CEA levels give no support for the differentiation between benign and malignant breast tumors.

Antibodies, Monoclonal↗
PubMed1991

Diagnostic tests for Trichinella spiralis infection in pigs. A comparative study of ELISA for specific antibody and histamine release from blood cells in experimental infections.

A study on the histamine release test (HR) for the demonstration of infections with Trichinella spiralis in pigs was carried out on 18 pigs, six infected with 200 larvae, six infected with 5000 larvae and six non-infected (control group). The results obtained by HR during a 7 week infection were compared with those of the enzyme-linked immunosorbent assay (ELISA). All inoculated pigs were found to be positive on Day 40 post-inoculation (p.i.) by necropsy examination of selected muscle groups, with mean recoveries of 7.9 and 225 larvae g-1 of tissue in the low- and high-dose group, respectively. At this time, all animals of the high-dose group and five out of six animals of the low-dose group were antibody positive in ELISA with any of three coating antigens employed (a crude muscle larva extract, an excretory/secretory (ES) antigen and a purified 45 kDa antigen). HR performed on whole blood was positive in four out of six pigs of the high-dose group and one out of six pigs of the low-dose group. The earliest ELISA seroconversions took place at Day 15 p.i. with crude and ES antigens. The earliest measurable reaction in HR performed on whole blood was found on Day 19 p.i. There was considerable individual variation regarding which test was the most sensitive for the early detection of infection. Washing of the blood cells prior to antigen provocation led to a markedly improved sensitivity of HR, all animals of the high-dose and three out of six animals of the low-dose group being positive by Day 40 p.i. The time course of the development of ELISA titres and HR reactivity indicated that this effect is due to the removal of blocking antibodies.

Animals↗
PubMed1991

Larval exoantigens from ascarid nematodes are potent inducers of histamine release from human blood basophils.

Histamine release (HR) from washed human blood cells after challenge with the excretory-secretory antigens (ES) of the parasitic nematodes Toxocara canis and Ascaris suum was studied, employing a recently developed microfibre-based assay combined with hyperosmolar release media for maximal sensitivity. Blood samples were obtained from 30 patients suspected of parasite infection and 11 healthy volunteers serving as controls. Specific antibodies of IgE, IgG1 and IgG4 subclasses were determined by ELISA. Virtually no HR could be provoked by ES in the 11 controls. In contrast, HR was seen in 16 patients after challenge with T. canis ES and in 11 patients with A. suum ES. In the majority of these, HR was detectable after challenge with ES protein concentrations of less than 1 ng/ml, and the maximal HR obtained with ES was greater than that seen with optimal concentrations of anti-IgE. The HR after ES antigen challenge correlated with the amount of specific IgE in patient plasma, and coincided with the presence of specific IgG1 and IgG4.

Animals↗
PubMed1991

Autonomic nerve antibodies and autonomic nerve function in type 1 and type 2 diabetic patients.

Complement-fixing adrenal medulla (CF-ADM), sympathetic ganglion (CF-SG), and vagal (CF-V) nerve antibodies were determined in diabetic patients. Among 74 patients with Type 1 diabetes, CF-ADM was detected in 7 (10%) cases, CF-SG in 14 (19%) cases, and CF-V in 8 (11%) cases. Among 38 patients with Type 2 diabetes, CF-ADM was detected in 5 (13%) cases, CF-SG in 4 (11%) cases, and CF-V in 6 (16%) cases. There were associations between autonomic nerve antibodies and autonomic nerve function. CF-ADM and/or CF-SG were significantly (P less than 0.002) less prevalent in Type 1 diabetic patients with autonomic neuropathy than in those without [5/44 (11%) vs. 14/30 (47%)] and, in agreement with this, the brake index, a sign of parasympathetic and sympathetic autonomic nerve function, was significantly (P less than 0.005) higher (more normal) in these patients (-0.56 +/- 0.13 vs. -1.04 +/- 0.12). In Type 2 diabetic patients, the E/I ratio, an index of parasympathetic nerve function, was significantly (P less than 0.03) lower (more abnormal) in those with CF-V than in those without (-1.81 +/- 0.17 vs. -1.20 +/- 0.11). In conclusion, the frequency of sympathetic nerve antibodies was decreased in Type 1 diabetic patients with autonomic neuropathy, while in Type 2 diabetic patients parasympathetic nerve antibodies were related to severe parasympathetic neuropathy.

Adrenal Medulla↗
PubMed1991

Non-Q-wave myocardial infarction associated with bleomycin and etoposide chemotherapy.

During chemotherapy with bleomycin and etoposide a 28-year-old male, suffering from germ-cell cancer, developed acute myocardial infarction. Under treatment with heparin and aspirin the patient revealed no Q-waves in ECG and recovery was without complications. Four weeks after onset of infarction, thallium-201 scintigraphy showed only a small irreversible, posteroseptal perfusion defect; coronary angiography was not performed. The chemotherapy regimen was continued and modified to etoposide as well as cisplatin and ifosfamide without recurrence of cardiac symptoms or ECG changes.

Adult↗
PubMed1991

[Kinetic effects of 6% hydroxyethyl starch 200.000/0.6-0.66 in hypervolemic hemodilution].

An open study was carried out in order to examine therapeutic effectivity of repeated administration of 6% hydroxyethyl starch 200.000/0.60-0.66 (HES). 10 patients aged 63 to 77 years with peripheral arterial occlusive disease Stage II b were given 500 ml Elohaest as a hypervolemic hemodilution for 12 days. Fasting levels of hydroxyethyl starch (HES) in serum, hematocrit, and serum-alpha-amylase were measured. During the first 4 treatment days, HES levels and serum-alpha-amylase increased in a significant manner; then it fluctuated towards a plateau without significant differences. The hematocrit decreased significantly from the beginning to the end of therapy. So it was possible to show, that during repeated application with the chosen dosage of 6% HAES 200.000/0.6-0.66 there is no dangerous cumulation of HAES.

Aged↗
PubMed1991

[Hypervolemic hemodilution with medium molecular-weight hydroxyethyl starch: effect of duration of administration on viscoelasticity of blood in IIa and IIb peripheral arterial occlusive disease].

45 consecutive patients suffering from peripheral arterial occlusive disease (PAOD) stage IIa and b were integrated in a study about the effect of hemorheological parameters due to different application times. The patients were divided into 3 subgroups with different application times: group A received the infusion during 2, group B during 4, and group C during 6 hours. The used substance was 500 ml 6% HES 200,000/0.6-0.66. Except elasticity of group A all hemorheological parameters from group A to group C show a decrease after 6 hours, the trend to the same phenomenon could be observed after 24 hours in group B and C, while group A except plasma viscosity showed even a trend to increasing values compared to onset. As a conclusion of these results, long-time application should be preferred.

Adult↗
PubMed1991

[Silent myocardial ischemia. Current concepts of pathophysiology and diagnosis].

Silent myocardial ischemia (SMI) is divided into 3 groups: type I: completely asymptomatic patients, type II: patients after acute myocardial infarction with SMI, type III: patients with angina pectoris (AP) and SMI. Pathophysiology on the lack of pain-perception and the cause for high tolerance against pain in SMI-patients has not yet been cleared up. It is most likely that more than one mechanism is involved in every patient, e.g. generally lower pain-perception in SMI-patients, physically counter-regulation in pain, duration and strength of myocardial ischemia. Diagnosis of SMI can be made by exercise- and long-term-ECG, thalliumszintigraphy and coronary angiography, in doing so the pros and cons of the 4 established methods have to be noted. The summary of the findings together with the lack of pain leads to the diagnosis of SMI.

Angina Pectoris↗
PubMed1991

[Gallopamil and changes of adenosine diphosphate- and collagen-induced thrombocyte aggregation].

In blood samples of 12 healthy volunteers (5 female, 7 male) the influence of Gallopamil (Procorum, CAS 16662-47-8) on the adenosine-diphosphate- (ADP-) and collagen-induced platelet aggregation was studied. Measurements in platelet rich plasma after induction with 1 mumol ADP and 0.5 microgramml collagen with gallopamil were performed. After incubation mit 250 mumol gallopamil a second test was carried out. The parameters were compared with the U-test. After application of 250 mumol gallopamil a significant reduction of ADP- and collagen-induced platelet aggregation could be observed. This is a sign for a protective effect of gallopamil in atherosclerotic disorders due to its calcium-channel blocking property.

Adenosine Diphosphate↗
PubMed1991

[Evaluating thyroid gland function in patients with protein anomalies].

The euthyroid hyperthyroxinemia (EHT) is characterized on the one hand by a normal basal THS or TRH-TSH response but also by high plasma values of total thyroxine (TT4) on the other. However if only TT4 is assessed, "hyperthyroidism" may be diagnosed erroneously. EHT may be caused by an increase of specific thyroxine binding proteins which may be hereditary (permanent) or acquired (transient). The most frequent disturbance is due to an estrogen induced increase of thyroxine binding globulin (TBG) in the course of pregnancy, anticonceptive drugs or estrogen treatment. The albumin associated HT (FDH syndrome), first reported in 1979, has autosomal dominant traits. 144 patients with FDH syndrome were observed during the period between 1984 and 1990, i.e. 7% (1986) of all hyperthyroid patients explored. Family screening is required to prevent unjustified treatment. Additionally existing disturbances of thyroid function as well as other protein binding anomalies may both cause problems in differential diagnosis. Prealbumin associated hyperthyroxinemia (PAAH), first published in 1982, may be due to an inherited increase in affinity, but may also be the consequence of a true elevation of prealbumin plasma concentration in the course of an islet cell cancer; both conditions are extremely rare. Nearly as rare are patients with plasma autoantibodies directed against T4 and/or T3 (5 cases); yet, a reverse T3 autoantibody could be observed in merely 1 case. By means of our modified radio-thyroxine-agarosegel-iceelectrophoresis all such protein anomalies may be diagnosed and differentiated in 1 procedure. Moreover, all other types of EHT must be taken into consideration by differential diagnosis.

Blood Protein Disorders↗
PubMed1991

[Effect of metoprolol on microcirculation and blood viscoelasticity].

In 40 patients microcirculation of skin as well as viscoelasticity of blood and plasma were investigated. 20 of them suffered from essential hypertension (group A) and were treated with metoprolol with a dosage of 50 to 200 mg per day. The rest of 20 subjects were controls (group B). In the group treated with metoprolol the values for blood viscosity were decreased in a significant manner, while skin microcirculation, blood elasticity and plasma viscosity did not show a significant difference. The results demonstrate that metoprolol is not only possible as medication in ischemic disease, but this substance can have a benefit in this indication because of its hemorheological effect.

Blood Flow Velocity↗
PubMed1991

[Modifications in erythrocyte elongation in blood samples of test subjects following gallopamil administration].

In 12 blood samples of healthy non-smokers younger than 40 years the erythrocytes-elongation was studied after Gallopamil-incubation, to obtain data for a possible rheological effect of this substance. For incubation dosages of 20, 50 and 100 micrograms/ml were used. After incubation with 50 and 100 micrograms/ml the elongation index of red blood cells increased in a significant manner. The results show, that Gallopamil does not only have a effect for vasodilatation but also for hemorheological parameters.

Adult↗
PubMed1991

Anti-carcinoembryonic antigen immunoscintigraphy (technetium-99m-monoclonal antibody BW 431/26) and serum CEA levels in patients with suspected primary and recurrent colorectal carcinoma.

This study comprises a total of 141 patients with suspected primary and recurrent colorectal carcinomas, in whom immunoscintigraphy with 99mTc-Mab BW 431/26 was performed. Whole-body scans were done 5.5 hr and SPECT imaging of the abdominal region was done at 6 and 24 hr postinjection of 1100 MBq 99mTc-labeled Mab (1 mg). In the course of primary tumor identification (n = 65), sensitivity of anti-CEA immunoscintigraphy was 95%, specificity 91%. In the diagnosis of early recurrences (n = 76), immunoscintigraphy was the method of choice to clarify the problem (sensitivity 94%; specificity 86%). Overall sensitivity of immunoscintigraphy in patients with suspected colorectal carcinomas and early recurrences was 95%, specificity 88%. Human anti-mouse antibodies were found in 29% (80% predominantly anti-isotypic, 20% predominantly anti-idiotypic). In contrast to anti-CEA immunoscintigraphy, the results of serum CEA levels were rather disappointing. Only 18 out of the 43 surgically verified primary colorectal carcinomas and 17 out of 32 patients with recurrences showed elevated serum CEA levels. In our clinical experience with this 99mTc-labeled anti-CEA antibody, immunoscintigraphy can play an important role in the identification of early colorectal recurrences and in postoperative colorectal cancer patients it should be performed in cases with unclear transmission computed tomography.

Adult↗
PubMed1990

[Volume replacement with 2 equivalent molecular weight dextrans: effect on erythrocyte elongation in vitro].

The influence of 2 dextranes with the identical molecular weight of 70,000 Dalton for erythrocytes' elongation was investigated in-vitro in 12 healthy male subjects. An increasing dosage between 0.5 and 10 mg/ml Dextran (trade name: Dextran 70 "Ebewe") and Dextran B (weight-equivalent) was added and the elongation index of erythrocytes at shear-rate 50/sec was determined under fluid conditions. Dextran B showed a stronger reduction of elongation index than Dextran A with an elevation of difference up to the highest dosage. The results show that although the molecular weight is identical, differences in hemorheological properties could observed. This should be taken into consideration for volume substitution therapy.

Adult↗
PubMed1990

[Iodine supplementation in the province of Styria].

As far back as 1898 the Austrian Nobel price winner Wagner von Jauregg was the first to recommend iodination of salt as prophylaxis against endemic goitre (prevalence 48%) and cretinism (greater than 10%). In 1923 he achieved in a voluntary iodine supplementation of 5 mg KJ/kg table salt, which only lasted for a number of years. It was in 1963 when finally a mandatory iodized salt prophylaxis was introduced at the rate of 10 mg KJ/kg. In this study the effect of 25 years of iodine supplementation is investigated: Endemic cretinism, hypothyroidism, and goitre in newborns disappeared generally and endemic goitre in pupils was significantly reduced. However, due to epidemiological studies at elementary and secondary schools and army recruitment examinations we still found out endemic goitre grade I (according to WHO) mainly in female juveniles. Examinations were done by palpation, ultrasonography and urinary iodine excretion. In the above as well as in the urine of newborns and in mother's milk the iodine content was significantly lower than in iodine rich countries. Consequently a higher iodination of salt at the rate of 20 mg KJ/kg was recommended by the Austrian Society of Nuclear Medicine in 1985. This suggestion was taken up by the Austrian authorities and it will finally be instituted by law in May 1990 for the benefit of coming generations.

Adolescent↗
PubMed1990

Localization of mediastinal parathyroid adenoma by T1-201 scintiscan and SPECT.

A 64-year-old female patient was admitted to our department for fatigue, pain in the right upper abdomen, obstipation, and meteorism. The laboratory findings showed total calcium and ionized calcium elevated, phosphate close to lower limit, and parathyroid hormone increased. T1-201/Tc-99m subtraction scintiscan of the neck and upper mediastinal region did not give any evidence of isolated enhanced uptake suggesting the presence of parathyroid adenoma. After further increases in calcium and parathyroid hormone level T1-201 whole-body scan and single photon emission computed tomography of the thoracic region were performed. These revealed a circumscribed T1-201 uptake in the mediastinum immediately cranial ventral to the heart base. The postcontrast transmission computed tomography of this area confirmed the finding of the T1-201 scintigraphy with a 4 x 3 x 2 cm tumor. After sternotomy and surgical removal of the mediastinal parathyroid adenoma (chief cell adenoma), calcium and parathyroid hormone levels returned to normal values.

Adenoma↗
PubMed1990

[Erythrocyte elongation with 10% dextran 40,000: comparison of 2 substances].

A dosage-effect-study with two 10% dextrans 40,000 was carried out in 12 venous blood samples of healthy men aged from 21 to 45 years. Dextran A (trade name: Dextran 40,000 "Ebewe") and Dextran B (trade name: "Rheomacrodex") were added in dosages of 0.5 to 10 mg/ml whole blood and the elongation-index of erythrocytes at shearrate 50/sec was determined. From 1 mg up to 10 mg/ml the elongation-index in Dextran B showed a stronger decrease than in Dextran A. Under the highest dosage the difference was about 20%. So it was possible to show that in spite of identical molecular weight there are different effects on deformability of erythrocytes. This should be taken into account for parenteral treatment.

Adult↗