Biomedical subjects

W Knogler

Publications and source records attributed to W Knogler.

At least 19 recordsLinked to original sources

PubMed2001

Body composition characteristics are associated with the bone density of the proximal femur end in middle- and old-aged women and men.

OBJECTIVES: In the present study the associations between bone density of the proximal femur end and weight status, fat distribution patterns (FDI) and body composition parameters i.e. amount of body fat and lean body mass were tested in a sample of old aged women and men. METHODS: In 77 healthy women ranging in age from 60 to 92 years (x=71.8 years) and 62 healthy men ranging in age from 60 to 86 years (x=71.5 years) the bone mineral density (BMD of the proximal femur end and the body composition parameters absolute fat mass, relative fat mass, lean body mass and bone mineral content were estimated by dual energy X-ray absorptiometry. Additionally, the weight status (body mass index, BMI) and the FDI were calculated. The bone density of the proximal femur end was correlated with the absolute fat mass and the lean body mass as well as with the BMI and the FDI. RESULTS: BMD correlated in females significantly positively with parameters of body composition, in males no significant correlations between fat mass (absolute and relative) and BMD as well as BMD/stature was found. Furthermore, it was shown that the weight status (BMI; r(2)=0.13, P<0.0003 in males and r(2)=0.27, P<0.000 in females), and the lean body mass (r(2)=0.21, P<0.001 in males, r(2)=0.36, P<0.004 in females) were associated significantly positively with the BMD of the proximal femur end in both sexes. The absolute fat mass had a significant impact on BMD in the female subsample only (r(2)=0.24, P<0.000). CONCLUSIONS: A lower weight status and a low amount of lean body mass, indicating not only lack of biomechanical forces of the proximal femur end, but also a lack of physical activity can be assumed to be associated increased bone loss and the development of osteoporosis in both sexes. An association between low amount of fat tissue and decreased BMD was especially found in women and may be due to the reduced conversion rates from androgens to estrogens in a low amount of fat tissue.

Absorptiometry, Photon↗

PubMed2001

[Significance of body weight status for bone density in the elderly and very old].

Reduced bone density and osteoporosis are significant health problems and contributors to disability and mortality among older women and men. Therefore the decline of bone mineral content (BMC) and bone mineral density (BMD) are aspects of ageing with great medical and social significance. In recent years a low body weight was declared to be an important risk factor for the development of osteoporosis. In the present study the impact of weight status, defined by the categories of the WHO, on BMC of the whole body and BMD of the proximal femur end, determined by dual energy x-ray absorptiometry (DEXA), were studied in 77 female and 62 male probands aged between 60 and 92 years (x = 71.7 yrs). With increasing weight status (BMI categories), BMC and BMD increased significantly (p < 0.001). This was true of both sexes. Even moderate overweight women and men (BMI 25.0-29.99) showed a significantly higher bone density than their normal weight counterparts (BMI < 25.0). In the present study a marked positive impact of body weight on bone density of old-aged women and men could be shown.

Aged↗

PubMed2001

Fever, cancer incidence and spontaneous remissions.

OBJECTIVE: Accumulating evidence exists for (1) an inverse correlation between the incidence of infectious diseases and cancer risk and (2) an inverse correlation between febrile infections and remissions of malignancies. This review is part of an effort of the Office of Alternative Medicine at the National Institutes of Health to examine this evidence. METHODS: A review of the literature to a key word search was undertaken, using the following key words: fever, infectious diseases, neoplasm, cancer incidence and spontaneous remission. RESULTS: The data reviewed in this article support earlier observations on the topic, i.e. that the occurrence of fever in childhood or adulthood may protect against the later onset of malignant disease and that spontaneous remissions are often preceded by feverish infections. CONCLUSION: Pyrogenic substances and the more recent use of whole-body hyperthermia to mimic the physiologic response to fever have successfully been administered in palliative and curative treatment protocols for metastatic cancer. Further research in this area is warranted.

Communicable Diseases↗

PubMed1999

The role of oxytocin in relation to female sexual arousal.

Oxytocin is clearly involved in human reproduction and serves an important role in sexual arousal. Oxytocin serum levels were measured before and after sexual stimulation in 12 healthy women. Values of oxytocin 1 min after orgasm were significantly higher (p < 0.05) than baseline levels. This finding supports the hypothesis that oxytocin plays a major part in human sexual response both in neuroendocrine function and postcoital behavior.

Adult↗

PubMed1998

The impact of nutritional status on body fat distribution patterns in pre- and postmenopausal females.

This study examines the impact of nutritional status, classified by body mass index, on sex specific fat distribution patterns dependent on menopausal status in 467 pre-, peri- or postmenopausal females. Absolute and relative amounts of upper and lower body fat were estimated by means of dual energy X-ray absorptiometry. It was found that low weight, independent of menopausal status, leads to the typical gynoid pattern of fat distribution while excess weight and obesity result in the android pattern of distribution in pre- and postmenopausal women.

Adipose Tissue↗

PubMed1996

Hormonal, syndromal and EEG mapping studies in menopausal syndrome patients with and without depression as compared with controls.

UNLABELLED: The aim of the study was to investigate brain function in menopausal depression by EEG mapping, as compared with menopausal syndrome patients without depression and normal controls, and to correlate neurophysiological with clinical and hormonal findings in order to elucidate the pathogenesis of depression in the menopause. METHODS: One hundred and twenty-nine menopausal women, aged 45-60 years, with no previous hormonal replacement therapy were investigated in regard to hormones (estradiol [E2], follicle stimulating hormone [FSH]), clinical symptomatology (Kupperman Index [KI], Hamilton depression score [HAMD]) and brain function (EEG mapping). Based on KI and DSM-III-R research criteria for major depression, 3 groups were available for statistics (after removal of protocol violators): group A had a KI of <15 and no depression (n = 29); group B had a KI of > or = 15 and no depression (n = 29) and group C had a KI of > or = 15 and fulfilled the criteria for major depression (n = 60). RESULTS: EEG maps of depressed patients demonstrated less total power and absolute power in the delta, theta and beta band, more relative delta and less alpha power as well as a slower delta/theta and faster alpha and beta centroid than controls, suggesting a vigilance decrement. Group B did not differ from group A. Correlation maps showed significant relationships between estradiol levels and EEG measures (the lower the E2, the worse the vigilance) and between the EEG measures and the Hamilton depression (HAMD) score (the worse the vigilance, the higher the depression score). There were no correlations between the hormones E2 and FSH and the syndromes KI and HAMD. In the target variable, the asymmetry index, depressed patients showed less alpha power over the right than left frontal lobe, whereas normal controls exhibited the opposite. Group B did not differ from group A. The frontal asymmetry index was significantly correlated with the Hamilton depression score and suggests right frontal hyper- and left frontal hypoactivation in depression. CONCLUSIONS: Although hormonal findings are not directly linked to psychic changes, low estradiol levels do contribute to a decreased vigilance at the neurophysiological level , which is in turn correlated with higher depressive and menopausal symptomatology at the behavioural level. Depression is further correlated to a right frontal hyper- and left frontal hypoactivation.

Brain↗

PubMed1996

Presence of endothelial calcium-dependent nitric oxide synthase in breast apocrine metaplasia.

Endothelial calcium-dependent nitric oxide (NO) synthase has been shown to be expressed in human malignant breast tumours, and its presence correlates with tumour grade. Moreover, NO, being synthesised in breast tumour cells, may increase tumour blood flow and promote angiogenesis. In view of these aspects, we have assessed the distribution of NO synthase within a series of benign breast tumours using a monoclonal antibody against human endothelial calcium-dependent NO synthase. Activity was predominantly localised in apocrine metaplastic cells of fibrocystic disease, as well as in endothelia throughout all tissue sections. Consistent with previous reports, no endothelial calcium-dependent NO synthase immunoreactivity was observed in poorly differentiated infiltrating duct carcinoma cells. In conclusion, expression of endothelial calcium-dependent NO synthase in human breast apocrine metaplasia may be of significance in view of the NO's vascular effects in benign breast disease.

Antibodies, Monoclonal↗

PubMed1996

[Leiomyomatosis of the lung--a case report with immunohistochemical evaluation].

A 56-year-old women who had undergone hysterectomy 15 years ago was found to have pulmonary leiomyomatosis. The occurrence of hormone receptors shows the influence of the ovary and of hormone-replacement-therapy to these tumors. In our case immunoperoxidase techniques indicate the expression of progesterone receptors.

Female↗

PubMed1995

[Measuring skin thickness in perimenopausal women. Correlation with bone density and hormone parameters].

AIM: To evaluate the connection between alterations in skin-thickness and bone density in menopause. METHOD: In 231 perimenopausal women the skin thickness was measured with ultrasound and correlated with the results of bone densitometry and the hormonal parameters. RESULTS: The correlation between skin thickness and bone densitometry showed a statistical significance of p < 0.0001. Thus we could demonstrate that not only the bone but also the skin is a hormone-dependent organ which responds enormously to a decrease of C19 and C18 steroids. CONCLUSION: Ultrasound skin measurement is a very simple method which can be used for a more differentiated diagnosis and therapy in menopausal women.

Bone Density↗

PubMed1995

[Correlation of skinfold thickness with bone density and estradiol, FSH and prolactin level in a sample of 231 women].

Skin thickness was measured by means of ultrasound and correlated with the results of bone densitometry and hormonal parameters. Skin thickness and bone density were significantly correlated (p < 0.0001). These results indicated that not only bone, but also skin is a hormone-dependent organ, which responds to the menopausal decrease in sexual steroids. Hence, skin ultrasound, just like bone densitometry, can be useful implemented in the differential diagnostic procedure, as well as the therapy of the menopausal syndrome. Additionally, the estrogen-dependent postmenopausal decrease in collagen tissue can be assessed by ultrasound and a successful therapeutic outcome achieved by optimizing the dosage of estrogen substitution.

Bone Density↗

PubMed1994

Absorption of orally supplied natural estrogens correlated with age and somatometric parameters.

The plasma levels of estradiol were studied in 20 postmenopausal women over a period of 8 h following the ingestion of a single dose of 2 mg estradiol valerate and 2 mg micronized estradiol. The determined plasma estradiol concentrations were correlated with somatometric characteristics and age. Twenty-six postcephalic body measurements, the body weight and six skin-fold thickness measurements were taken and the body mass index computed; estradiol serum concentration was measured before and after administration of micronized estradiol and estradiol valerate, respectively. It was shown that estradiol concentrations obtained after estradiol valerate and micronized estradiol ingestion were dependent on the patient's age as well as on the constitutional type. Additionally, we found that there were differences in the reachable estradiol plasma concentrations following the application of the two preparations. Our results justify the individual and differentiated estrogen replacement therapy of the postmenopausal woman.

Administration, Oral↗

PubMed1994

[Placebo-controlled study of melbrosia in treatment of climacteric symptoms].

In a placebo controlled randomized trial we evaluated the efficacy of melbrosia in women who suffered from severe menopausal symptoms. We could show that there was hardly no difference in the change of biochemical parameters, but we found out that the decrease of menopausal symptoms (headache, urinary incontinence, dry vagina, decreasing vitality) was significant in women who did undergo melbrosia medication compared to those who just took placebo. Due to our investigations we reasoned that melbrosia is especially appropriate to women who do not want and who do not need hormone replacement therapy, but who do suffer from menopausal symptoms.

Adult↗

PubMed1993

Beta-endorphin, steroids, and prolactin. Immunoassay in breast cysts and blood.

Circulating levels and cyst fluid concentrations of beta-endorphin (beta-EP), estradiol, progesterone, and prolactin were measured by radioimmunoassays in 10 premenopausal women with gross breast cysts. In addition, aspirates and frozen tissue sections from cystic lesions were investigated immunocytochemically for a possible beta-EP production. Epithelia of dilated ducts, smaller cysts, and hyperplastic lesions without atypia showed a strong positive reaction in the cytoplasm. In apocrine metaplasia, this staining was concentrated in the apical region. The staining intensity in atypical hyperplasia was diminished. Occasionally, normal duct and lobular epithelia exhibited positive beta-EP immunostaining. Levels of beta-EP, estradiol, and progesterone in the cyst fluid were significantly higher than in blood, but no significant differences were observed for prolactin. The ratios of progesterone to estradiol, estradiol to prolactin, and progesterone to prolactin in the cyst fluid were considerably higher than in blood. This suggests that beta-EP and steroid hormones are secreted from the lining epithelia into the breast cysts.

Estradiol↗

PubMed1992

[Bone density before and after the hormonal therapy of young women with hypergonadotropic hypogonadal amenorrhea].

Dual energy X-ray absorptiometry of bone density in the lumbar vertebral column was performed in 32 young women (mean age 24.6 [19-34] years) with hypergonadotropic hypogonadal amenorrhoea. There was a significantly lower bone density (0.74 +/- 0.27 g/cm2) than in a control group of 27 women of similar age (1.17 +/- 0.081 g/cm2; P less than 0.001). Subsequently 21 of the 32 women received cyclical hormone substitution therapy for 24 months (day 1-30: 0.625 mg conjugated oestrogens; additionally, on days 20-30: 5 mg medrogestone; followed by a seven-day pause). After 6 months bone density, compared with that of the 11 untreated women, had increased significantly (P less than 0.001). It is therefore recommended that young hypoestrogenemic women should receive early and continuous hormone substitution treatment.

Absorptiometry, Photon↗

PubMed1992

Screening for Epstein-Barr and human cytomegalovirus in normal and abnormal cervical smears by fluorescent in situ cytohybridization.

Using the routine Papanicolaou test for grouping, 35 normal and 148 abnormal cervical smears were screened by fluorescent in situ cytohybridization for Epstein-Barr (EBV) and human cytomegalovirus (HCMV). Viral presence was detected in 55% of all hybridized smears while routine Papanicolaou tests exposed no morphological evidence for HCMV or EBV. Thus in situ cytohybridization is necessary and suitable for direct identification of EBV and HCMV. The prevalence of viral infection for women with normal cervical smears was 29% for HCMV and 34% for EBV. Even smears of three of the four virgins were positive for HCMV and two had a mixed infection with EBV. The infection rate with at least one of these two herpesviruses was 51% in the control group, 56% in smears with reactive and reparative cell changes, 54% in mild (slight) dysplasias and 56% in moderate or severe dysplasias. Thus infection with HCMV and EBV did not differ significantly in controls and prevention groups. Both viruses were most frequently found in the age group 20 to 29 years. These data suggest that HCMV and EBV are not involved in the etiology of intraepithelial neoplasias and carcinomas of the uterine cervix.

Adolescent↗

PubMed1992

Expression of cathepsin D in head and neck cancer.

To determine overexpression of cathepsin D in head and neck tumours we examined cytosols from 53 primary tumours, nine cytosols of lymph node metastases and 12 cytosols from adjacent normal tissue. We found a significantly lower concentration in normal tissue compared with tumour cytosol as well as with metastases, even when we compared tumours and corresponding metastases pairwise. In addition, we found a significantly higher concentration of cathepsin D in five lymph node metastases than in the corresponding tumours. We conclude that the reported role of cathepsin D is not restricted to breast cancer but could also be important in head and neck cancer.

Biomarkers, Tumor↗

PubMed1992

[Human papillomavirus (HPV) DNA infections of the uterine cervix].

411 women who had dysplasia, selected from an ambulatory group as well as 240 women from a random control group were examined, by using cervical smears, which were initially diagnosed as human papilloma viruses-DNA (HPV-DNA) of the type 6/11, or 16/18, or 31/33/35. This was achieved by the in-situ nucleic acid hybridisation technique. The results of the HPV-DNA typing were tabulated with the cytological diagnosis (Munich Papanicolaou (Pap.) group-classification). The control group corresponding to Pap.Gr. I, and was HPV-DNA positive in 6 (2.5%) of the 240 cases. The group of 180 patients with a Pap.Gr. II showed a HPV-DNA positive result for 75 cases (41.7%); 57 of 99 cases (57.6%) occurred in Pap.Gr. IIID; 42 of 54 cases 77.8% (L) were found in Pap.Gr. IV (a/b), and 72 of 78 cases (92.3%) appeared in Pap.Gr. V. The HPV-DNA mixed infections became evident as the cellular dysplasia increased. The results of the HPV-DNA positive diagnosis clearly indicate a close correlation with the Pap.Gr.-classification. The HPV-DNA type 16/18 was most frequent in cervical carcinomas (Pap.Gr. V). The cyto-histological control of the 57 HPV-DNA positive cases of the untreated Pap.Gr. IIID showed a regression in 31.6% of the 18 cases after a period of 3 to 6 months (post HPV-DNA typing). These were histologically normal. In 33 cases (57.9%), there was a persisting Pap.Gr. IIID (CIN I/II) and in 6 cases (10.5%) a progredient correlation in Pap.Gr. IV a/b. The Pap. group IV (a/b) was histologically a CIN grade III.

Adolescent↗

PubMed1992

[Epidermal growth factor receptor in human breast cancer: correlation with steroid receptors, tumor stage, grading and menopausal status].

In this study, correlations between the epidermal growth factor receptor (EGF-R), steroid receptors, and other prognostic parameters (grading, pTNM-status, menopausal status) were analysed in 326 primary breast carcinomas. 19% of the tumour samples were EGF-R positive, 63% were estrogen receptor (ER) and 54% progesteron receptor (PR) positive. Both steroid receptors were positive in 46% of all samples. We found a highly significant inverse correlation between EGF-R and steroid receptors. 88% of the ER positive tumours were EGF-R negative (p less than 5 x 10(-5)), 90% of the PR positive tumours were EGF-R negative (p less than 5 x 10(-5)) and 91% of the ER plus PR positive tumours were ERF-R negative (p less than 1 x 10(-6)). Grading was available in 170 cases. Six (4%) of the carcinomas were highly differentiated (G1), 82 (48%) were classified as G2, and another 82 (48%) were poorly differentiated (G3). A combination of negative ER and positive EGF-R was found more often in the population of G3 tumours. EGF-R was also positively correlated to tumour size. With regard to receptor status, we did not find a correlation with lymph node involvement. The ER correlated negatively (p less than 1.3 x 10(-5) and the EGF-R positively (p less than 0.042) with menopausal status. Thus, EGF-R overexpression seems to be a marker of morphological and functional dedifferentiation which is associated with a loss of steroid dependency and an increase of an autostimulatory-paracrine growth control. These changes seem to be related to poor prognosis.

Breast↗