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Biomedical subjects

M Lehtinen

Publications and source records attributed to M Lehtinen.

At least 145 records · Page 8Linked to original sources
PubMed1985

Immunoblotting and ELISA analysis of HSV-1 and HSV-2-specified polypeptides by using an immunoblocking method.

Herpes Simplex Virus (HSV) specified polypeptide antigens were analyzed by immunoblotting and enzyme-linked immunosorbent assay (ELISA) methods. In general, the virus specified proteins showed marked cross-reactivity. However, the HSV-1 specified glycoprotein C could be detected by HSV-1 infected rabbit antiserum only. Two low molecular weight polypeptides showed considerable reactivity with HSV-2 induced immune sera as revealed by an immunoblocking modification of the immunoblotting method. These proteins may prove useful in the serological diagnosis of HSV Type 1 and Type 2 infections.

Antigen-Antibody Complex↗
PubMed1985

Endometritis and acute salpingitis associated with Chlamydia trachomatis and herpes simplex virus type two.

A patient who had endometritis confirmed by endometrial biopsy and acute salpingitis confirmed by laparoscopy is reported. Chlamydia trachomatis and herpes simplex virus type two were isolated from the endometrial cavity and the fallopian tube. The histopathologic findings of the endometritis were similar to those frequently seen in chronic chlamydial eye disease or chlamydial cervicitis.

Acute Disease↗
PubMed1985

Anatomic sites of upper genital tract infection.

The microbiologic correlates of upper genital tract infection were studied among 36 women with suspected upper genital tract infection and 11 control women undergoing tubal ligation. Laparoscopic evidence of confirmed salpingitis was seen in 25 (69%) of the 36 women. Pathologic evidence of endometritis was present in 26 women (72%), and 22 (85%) of them had salpingitis as well. Thus, four women had endometritis but no salpingitis, three women had salpingitis but no endometritis, and seven women had neither. Among the 25 women with salpingitis, one or more organisms were isolated from the fallopian tubes of nine women (36%) and from the cul-de-sac of six women (24%), versus none and one (9%), respectively, among the 11 cases without salpingitis, and one (9%) and none among the 11 control women. Among the 26 cases with endometritis, one or more organisms were isolated from the endometrium of 19 women (73%) versus 12 (67%) among the 18 women without endometritis. Chlamydia trachomatis was isolated from the uterine cavity of nine women and from the fallopian tubes of three women with upper genital tract infection. The corresponding figures for Neisseria gonorrhoeae were three and two. Other nongonococcal nonchlamydial organisms were commonly isolated from the fallopian tubes and/or culde-sac of women with salpingitis. Bacteria frequently were isolated from the endometrium of both study cases and control subjects, but the latter were more likely to have nonpathogens of low virulence.

Adolescent↗
PubMed1984

Quality control of insulin radioreceptor assay for human erythrocytes. Effect of ageing of mono-125I-Tyr-A14-insulin preparation.

The quality control of insulin radioreceptor assay for human erythrocytes is based on the storage of erythrocyte preparations in Hepes buffer of pH 8.0, containing 10 g/l of albumin and 20 mmol/l of glucose. The change of erythrocytes into spherocytes and crenated cells reduces the apparent number of insulin receptors in a relatively constant way by less than 8% a week after 10 days of storage. At the same time the dissociation constants of the insulin-receptor complex increase rapidly. Thus the use of a preparation must be limited to controlling the determination of the insulin binding sites of erythrocytes, and not to the measurement of the affinities of the receptors. When mono-125I-Tyr-A14-insulin gets old, a slow decrease in the insulin binding sites can be measured, but the dissociation constants of the insulin receptor complex are not affected.

Erythrocytes↗
PubMed1984

Purification of herpes simplex virus-specified major DNA-binding proteins and detection of antibodies to them in human and rabbit sera.

We purified herpes simplex virus type 1 and 2-specified nonstructural DNA-binding proteins (ICP8 and ICSP 11/12, respectively) from infected Vero cells and applied them in ELISA test to analyse human and rabbit sera. Only a weak immune response to the ICP8 and ICSP 11/12 could be demonstrated following experimental HSV-1 or HSV-2 infections of rabbits. Low levels of ICSP8 antibodies were found also in acute HSV infections of man.

Animals↗
PubMed1983

Drugs for Parkinson's disease reduce tremor induced by physostigmine.

The effects of anticholinergic and dopaminergic drugs used for Parkinson's disease were studied on the tremor induced by physostigmine (0.3-3.0 mg/kg) in rats. For the measurement of tremor a new electronic device was employed. Atropine (0.3-1.2 mg/kg) and biperiden (0.01-1.0 mg/kg) reduced the physostigmine-induced tremor in a dose-related manner and could abolish it. Biperiden was less potent than atropine. Methylatropine in a dose of 1.2 mg/kg slightly inhibited the tremor. Amantadine (0.3-3.0 mg/kg) reduced the tremor but only to a certain degree. Bromocriptine (0.1-10.0 mg/kg) reduced it in a manner that was not dose-related. Pimozide potentiated the tremor in the dose of 0.2 mg/kg but not in larger doses. At the onset of the tremor, a small decrease in rectal temperature occurred. The hypothermia lasted significantly longer than the tremor. Neither the anticholinergic nor the dopaminergic anti-Parkinson drugs altered the hypothermic effect of physostigmine. The results show that those anti-Parkinson drugs, which act by increasing the dopaminergic activity can counteract the tremor induced by physostigmine. However, these drugs are clearly less active than th anticholinergic anti-Parkinson drugs.

Amantadine↗
PubMed1983

Fibrinogen: a comparison of an immunoturbidimetric method with four conventional methods.

A rapid and simple immunochemical method for fibrinogen determination is described. The method is based on measuring the turbidity caused by antigen-antibody complexes with an enzyme analyser using diluted antiserum as a starting reagent. This immunoturbidimetric method correlates well with the immunodiffusion method and with two of the thrombin methods. Its correlation with the precipitation method according to Low was a little weaker.

Fibrinogen↗
PubMed1983

HLA antigens in rubella seronegative young adults.

HLA antigen frequencies, including those of five HLA-D specificities, were studied in 91 rubella seronegative subjects who were found in screening programs for rubella vaccination. No significant differences in antigen frequencies between rubella seronegative subjects and the reference population could be found.

Adult↗
PubMed1982

The Finnish leukaemia group: levamisole in maintenance therapy of acute myeloid leukemia in adults.

The Finnish Leukaemia Group has carried out a randomized, multicenter trial to study the effect of levamisole on the remission maintained with 6-mercaptopurine and methotrexate in acute myeloid leukaemia in adults. Levamisole was given on 3 consecutive days every 2 weeks. Twenty-five patients received only chemotherapy, while 26 patients received levamisole as well. The patients receiving levamisole showed significantly better remission duration than those given only chemotherapy (P = 0.033, Mantel's summary chi 2-text). There are four long term survivors in the levamisole group versus none in the chemotherapy group. The remissions have lasted 48-75 months.

Adult↗
PubMed1981

Quantification of tremor in rats induced by physostigmine.

A simple and accurate device for recording tremor intensity in unanaesthetized and unrestrained rats is described. The physical measures of tremor are shown to have several advantages over previous devices. First, the new apparatus, unlike some earlier ones, does not restrict the animal's movements to an unusually small cage, with weighty mechanical devices or with electrical leads. Second, most earlier methods for measuring tremor use a subjective rating scale. However, the present method uses objective and reliable measures. In a double-blind, illustrative experiment involving complete crossover, Wistar rats were randomly injected IP with physostigmine in doses of 0.2, 0.4, 0.6 and 0.8 mg/kg or the corresponding amount of 0.9% NaCl solution as control. The recorded tremor intensity showed a clear dose-response relationship for physostigmine. Moreover, linear regression of the dose-response relationship showed that tremor intensity increased linearly with increasing doses of physostigmine. The cholinergic antagonist atropine (0.3 mg/kg SC) antagonized physostigmine-induced tremor, whereas methylatropine (0.3 mg/kg SC) tended to potentiate it. These results show that the technique described is suitable for quantification of tremor intensity in rats and for testing drug interactions on physostigmine-induced tremor.

Animals↗
PubMed1980

Macroglobulinemia with abdominal symptoms caused by intestinal extracellular macroglobulin.

A 54-year-old woman had a marked splenomegaly, diarrhoea and abdominal cramps. Her serum contained monoclonal IgM with lambda light chains, and lambda light chains were also excreted in the urine. Bone marrow and spleen punctures failed to reveal the classic morphological changes associated with Waldenström's macroglobulinemia. A peroral jejunal biopsy disclosed homogenous extracellular material consisting of IgM, lambda and kappa light chains were demonstrable in a large number of the plasma cells and plasmacytoid cells in post-mortem specimens of bone marrow, spleen and some lymph nodes by the peroxidase-anti-peroxidase techniques. The causes of the "discrepancy" between the serum findings and tissue findings are discussed.

Biopsy↗
PubMed1979

Unsuitability of bakery work for a person with atopy: a study of 234 bakery workers.

A disease of the atopic group was established in 25% of bakery employees investigated: 9% had asthma, 25% allergic rhinitis and 5% atopic eczema. The definite role of flour dust as an allergen maintaining asthma was established in 14 of 21 bakery employees with asthma. The onset of asthma in bakery work occurred after an average of 4.2 years of exposure to flour dust. The study revealed that 71% of the bakers suffering from an atopic disease had close relations with a history of atopic disease, whereas the corresponding percentage for the healthy group was 17. The results indicated that no person with current atopic disease or earlier signs of one should be given employment in the bakery branch. A relative bar to employment appears to be also the occurrence of these forms of diseases in the applicant's close relations.

Adult↗