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Biomedical subjects

W Knogler

Publications and source records attributed to W Knogler.

At least 37 records · Page 2Linked to original sources
PubMed1992

[Latent cervical virus infection as a possible cause of early abortion].

Cervical smears of 50 women who had an abortion were examined by dot-blot hybridization for human papillomavirus (HPV), herpes simplex virus (HSV) types 1 and 2, and cytomegalovirus (CMV) DNA. HPV DNA type 16 or 18 positivity was shown in 17.6% of the cases; in the aborted material, however, it amounted to 30.8%. IgM-positive titres were present in a few cases. In cervical smears of intact pregnancies, positivity for HPV DNA types 6 and 11 was detected in 9.5% and for the HSV DNA types 1 and 2 and CMV DNA in 48.0% of the cases. In this group of patients mostly positive IgM and IgG titers were present.

Abortion, Spontaneous↗
PubMed1992

[A main symptom of the climacteric manifestation complex: arthropathia climacteria].

In the last few years several studies have been published raising the question whether hormonal factors are co-responsible for the female prevalence of certain joint diseases. From our own clinical experience we know that more than half of the women seen at our outpatients department because of disorders of the post menopausal syndrome complain about arthralgies (especially of the PIP-joints). We have introduced the term "arthropathia climacterica" for it. Moreover the positive results of two clinical studies on which effects hormone replacement therapy had on these complaints indicate a relation between estrogens and joints.

Arthritis, Rheumatoid↗
PubMed1991

Ophthalmic complaints as a climacteric symptom.

The menopausal syndrome is characterized by a variety of emotional and physical symptoms of varying intensity. A total of 1287 women who attended the Outpatient Department for Climacteric Symptoms and Osteoporosis Prophylaxis (1st Department of Gynaecology and Obstetrics, University of Vienna Medical School) constituted the study population. These women, who were seeking relief from various complaints or for prophylactic assessment and treatment, visited the clinic over the period 1988-1989. We placed special emphasis on ophthalmic complaints as evidence of the incipient climacteric period. Of the 430 patients with eye complaints, 98 underwent ophthalmological investigation. Within our patient group, we analyzed the incidence and severity of menopausal eye complaints as well as therapeutic responses to hormone replacement therapy on an epidemiological scale. Potential endocrinological factors are discussed.

Climacteric↗
PubMed1991

[Eye manifestations as climacteric symptom].

The menopausal syndrome consists of a variety of psychic and physical signs of different intensity. At our outpatient department for problems in menopause and prevention of osteoporosis (1. Dept. of Gynaecol. and Obstetrics, Vienna) 1287 women who were consulting this department for the first time because of prevailing complaints or prophylactic reasons, were registered during the years 1988 and 1989. In the course of this work we paid particular attention to the symptom "eye complaint" as a sign of the beginning of the menopausal period. 98 out of 430 patients with eye complaints were examined ophthalmologically. Referring to our patient population we tried to analyse epidemiologically the frequency and the degree of severity of menopausal eye complaints as well as the therapeutical response to a hormone substitution therapy. To what extent an endocrinological explanation can be found and which facts lead us assume such a statement, we have tried to demonstrate in the discussion.

Climacteric↗
PubMed1990

Biotin and phosphorus-isotopic labelled DNA/RNA probes for the detection of human papilloma virus sequences.

In this study, the diagnostic accuracy and practicability of different hybridization techniques for the detection of human papilloma virus (HPV) DNA were tested. Cervical cell scrapes (n = 67) were analysed for HPV-DNAs 6/11 and 16, in order to compare a commercially available in situ DNA hybridization-assay with the conventional Southern-blot analysis. The in situ DNA hybridization-assay gave a sensitivity of 81.5%, a specificity of 97.5% and a diagnostic efficiency of 91.0% for HPV-DNAs 6/11. Using the same assay, we observed a sensitivity of 100%, a specificity of 96.3% and a diagnostic efficiency of 97.0% for HPV-DNA 16. The practicability of dot-blot DNA hybridization technique was tested on 176 cervical cell scrapes, in order to determine the prevalence rate of HPV-genotypes 6/11, 16/18 and 31/33/35. In the random control group (n = 106), 1.9% of the cases were HPV-DNA positive. In the cancer prevention group (n = 70), patients with reactive and reparative cell changes showed a HPV-DNA positivity of 55.0%, with mild (slight) dysplasia/CIN 1 of 73.7%, and with moderate to severe dysplasia/CIN 2 to CIN 3, including the carcinoma in situ/CIN 3 of 80.0%. Patients with squamous cell carcinoma of the cervix uteri gave HPV-DNA positive results in 96.2% of the cases. The suitability of in situ DNA hybridization for morphological studies was tested on tissue biopsies (n = 68). The HPV-DNAs 6/11 were found predominantly to 72.7% of the examined condylomas. The HPV-DNA positive cervices increased with the severity of the cytological dysplasia.(ABSTRACT TRUNCATED AT 250 WORDS)

Biotin↗
PubMed1990

Structural chromosomal abnormalities in gynecologic malignancies.

Surgical specimens taken from four patients with gynecologic malignancies were cultured, and metaphase chromosomes were prepared after staining with chromamycin-A, distamycin, and DAPI. Four specially selected karyotypes and their structural aberrations are discussed in this study and compared with those (also from carcinomas) previously described in the literature.

Adenocarcinoma↗
PubMed1990

HER-2 oncogene amplification and overall survival of breast carcinoma patients.

DNA was extracted from tumour samples of 77 patients with primary breast carcinoma and HER-2 proto-oncogene amplification was assessed. Prognostic indices such as number of positive lymph nodes, tumour size and histological grading were strongly associated with overall survival. No statistically significant correlation between amplification of HER-2 and overall survival was observed. In addition, prognostic indices, HER-2 amplification and disease-free interval was not correlated. Analysis of HER-2 amplification alone is not a useful guide in the management of patients with mammary carcinoma.

Breast Neoplasms↗
PubMed1989

HER-2 amplification, steroid receptors and epidermal growth factor receptor in primary breast cancer.

Amplification of HER-2 oncogene was analysed in DNAs obtained from 291 primary human mammary carcinomas. 52/291 (18%) were found to contain amplified HER-2 oncogene. Moderate amplification (2- to 5-fold) was noted in 36/291 (12%). Thirteen tumors (4.5%) had a copy number of 5 to 10. A 10- to 20-fold and greater than 20-fold amplification was observed in 2 and 1 patient, respectively. Sample sizes allowed the determination of estrogen receptor (ER) and progesterone receptor (PgR) levels in 253/291 primary breast cancers. HER-2 gene amplification was noted in 14% of ER+ patients and in 28% of ER- patients, respectively (P = 0.02). Similarly a significantly greater number of PgR- primary mammary carcinoma exhibited an amplification of the HER-2 gene compared to PgR+ cases (22% vs. 16%, P = 0.01). Although statistically not significant, tumors with HER-2 gene amplification were found to have lower levels of ER and PgR. No association of HER-2 amplification with the androgen receptor and EGF receptor was observed. Present data combine to suggest that tumor progression is more stringently controlled by the oncogene upon loss of hormone dependency. Differences found in HER-2 amplification between steroid receptor positive and negative tumors could be helpful to define a specific subset of women to whom adjuvant therapy should be directed.

Breast Neoplasms↗
PubMed1988

Beta-endorphin levels during the climacteric period.

Hot flushes are not caused by hypergonadotrophinaemia. This is apparent because peaks of gonadotrophin in the serum do not coincide with cutaneously measured hot flushes while such flushes still occur in hypophysectomized women. Gonadotrophin-releasing hormone and other neurotransmitters (possibly beta-endorphin) affect thermoregulation. The following hypothesis is advanced. During the climacteric period neurotransmitter changes, a decrease in catechol oestrogens, a decrease in alpha-2-adrenoceptor activity and cessation of ovarian steroid production may lead to alterations in endogenous opiate activity and thus to disturbances of thermoregulation, resulting in the occurrence of hot flushes. Low beta-endorphin levels in the peripheral plasma, which rise again following oestrogen treatment, are observed during the climacteric. On the other hand, women with severe hot flushes caused by a stress event show enormously increased beta-endorphin values, which are normalized by hormone substitution therapy acting via still unknown neuroendocrinological feedback mechanisms.

Body Temperature Regulation↗
PubMed1988

Abortion risk in chorionic villus sampling. Evaluation in elective termination of pregnancy.

100 patients were examined to evaluate the risk of abortion of chorionic villus sampling. In the 8th-10th week of pregnancy a catheter with a mandrin was introduced into the chorion frondosum under ultrasound guidance. The mandrin was then removed and trophoblast tissue obtained by aspiration. The patients agreed to postpone elective termination of pregnancy for 2 weeks. Another ultrasound was performed before suction curettage. With increasing experience, the abortion rate dropped to 4%, whereas the rate of successful biopsies and analyses rose to more than 90%. Based on these results, chorionic villi sampling was made available at the 1st Department of Obstetrics and Gynecology, University of Vienna, as an alternative method to amniocentesis. Out of 38 biopsies, 25 karyotypes were normal, two biopsies revealed pathological results (trisomy 21, 22), 11 samples showed no results (insufficient tissue or no mitoses). One patient had a spontaneous abortion (trisomy 22) and one an abortion due to infection. Chorionic villus sampling could replace amniocentesis because chromosomal anomalies may be detected already in the 1st trimester of pregnancy.

Abortion, Induced↗
PubMed1988

[Phospholipase A2 levels during labor].

Determinations of phospholipase A2 activity 2 hours after spontaneous start of uterine contractions in 14 women showed higher values than immediately post partum. The reason of this increase of enzyme activity inducing prostaglandin synthesis is not known yet.

Cesarean Section↗