PubMed Health⌕ Search

Biomedical subjects

A Manthey

Publications and source records attributed to A Manthey.

6 recordsLinked to original sources
PubMed2004

[Detection of chlamydia antibodies in non-standard biological fluids in women with fertility disorders].

OBJECTIVE: Detection of IgA and IgG antibodies against Chlamydia trachomatis in various biological materials in patients with fertility disorders. DESIGN: Retrospective study. SETTING: Department of Gynecology and Obstetrics, Medical Faculty of Charles University and Faculty Hospital, Plzen. METHODS: Antichlamydial antibodies IgA and IgG were detected in 73 patients. Examination of sera was performed in all 73 women, peritoneal fluid was examined in 20 patients who underwent diagnostic laparoscopy, follicular fluid samples in 22 women from IVF programme and antibodies in cervical ovulatory mucus were examined in 31 patients of the Division of Immunology of Reproduction. Results were compared with clinical findings and data of personal histories. Blood donors sera examination were used as a control group. RESULTS: High number of chlamydial antibody positivity was found in follicular fluid--in IgA (18/22, 82%) and IgG (16/22, 73%) and also in ovulatory cervical mucus in IgA (13/31, 42%). Examinations of sera did not differ significantly from the control group. CONCLUSION: High levels of chlamydial antibodies in follicular fluid samples could display connection between chlamydia infection and infertility, mainly as its organic cause (adhesions, tubal factor). IgA positivity in cervical ovulatory mucus is caused by local antibody production. Serologic examination of chlamydial antibodies is one of the most suitable examinations of entry in infertile patients as well as in pregnant women.

Adult↗
PubMed2001

R-twist gene expression during rat palatogenesis.

Palatal clefting is often associated with premature fusion of cranial sutures in human craniosynostosis syndromes, many of which are characterised by mutations affecting the fibroblast growth factor receptor (FGFR) gene family. In palatal fusion, epithelio-mesenchymal transition (EMT) contributes to the dispersion of the midline epithelial seam. EMT has also been observed in neoplastic epithelial cells in relation to the acquisition of malignant characteristics where morphological changes are accompanied by rapid switching in the expression of fgfr2 from the epithelial type (kgfr) to the mesenchymal type (bek). The twist gene codes for a basic helix-loop-helix transcription factor putatively involved in regulation of transcription of fgfr2. Mutations in the TWIST gene have been described as being responsible for the Saethre-Chotzen syndrome, an autosomal dominant craniosynostosis associated with cleft palate as well as other disturbances of the facial skeleton. In this study we have analysed the distribution of twist transcripts during rat palatogenesis in vivo from 14.5 to 17.5 days post coitum by in situ hybridisation with digoxygenin-labelled ssDNA probes. twist transcripts were found to be concentrated in mesenchymal cells beneath the epithelium at the tip of the palatal shelves immediately prior to, and during fusion as well as in a localised epithelial area at the tip of the shelves prior to fusion, thereby implicating twist gene expression in the process of palatogenesis. This pattern of expression illuminates the disturbances of maxillary growth that occur in human craniosynostotic syndromes.

Amino Acid Sequence↗
PubMed1999

Midline fusion in the formation of the secondary palate anticipated by upregulation of keratin K5/6 and localized expression of vimentin mRNA in medial edge epithelium.

Secondary palatal fusion is dependent on targeted removal of the epithelium between the palatal shelves. Aseptically delivered rat embryos 15 through 18 days post coitum (dpc) were probed with DIG-labeled antisense and sense ssDNA probes for spliced exon sequences flanking intron E of cytokeratins K5/6 and spliced exon sequences flanking intron F of vimentin. Cytokeratin K5/6 expression was upregulated in the medial edge epithelium (MEE) prior to rotation of the palatal shelves and in the vomerine epithelium in the region of fusion with the palate. K5/6 expression continued in the medial epithelial seam (MES) and in epithelial islands during breakdown of the MES. Vimentin expression was not detected in the MEE prior to rotation but was specifically upregulated in the MEE following rotation and prior to midline contact and continued in the MES and in epithelial cells identifiable during the breakdown of the MES. Initiation of vimentin upregulation in the MEE prior to contact of the palatal shelves was tested by serum-free organ culture of palates from embryos at 15.5 dpc with the shelves separated by a biocompatible membrane. Vimentin upregulation occurred in the epithelium specifically in the region of anticipated contact. These results are interpreted as indicating that i) cytokeratin K5/6 expression may play a critical role in the integration of the epithelial layers of the MES to ensure subsequent merging of the mesenchyme and ii) epithelial cells in the MEE are specifically 'primed' to upregulate expression of mesenchymal genes prior to integration into and breakdown of the MES.

Animals↗
PubMed1996

Insulin-like growth factor (IGF) receptor, IGF-I, interleukin-1 beta (IL-1 beta), and IL-6 mRNA expression in osteoarthritic and normal human cartilage.

Insulin-like growth factor-I (IGF-I) stimulates the production of extracellular matrix by cartilage cells and this action is mediated through the Type 1 IGF receptor. Expression of the genes for the IGF receptor and for IGF-I was examined in normal and osteoarthritic (OA) human articular cartilage by in situ hybridization. RNA transcripts for Type 1 receptor were detected in all 73 tissue samples and in 80-100% of chondrocytes per section. Signal for the receptor was present in normal and OA cells, and the highest message levels were in the tissues exhibiting advanced pathology. Strong message signals in the cells of the more advanced lesions were also noted for IGF-I, whereas little or no IGF-I mRNA was detected in normal samples. Interleukin-1 beta (IL-1 beta) induces degradation of extracellular matrix by cartilage cells, and expression of this gene was examined with digoxygenin-labeled oligonucleotide probes. mRNA transcripts were detected in only one in five of the cartilage samples taken from OA joints. Unlike IGF-I, expression did not correlate with the degree of OA pathology and positive cells were demonstrated also in samples from young normal cartilage. IL-6 mRNA was present both in surface and deep cells of fibrillated OA cartilage, but no signal was evident in histologically normal cartilage from OA tissue or in normal young joints.

Adult↗
PubMed1989

Microbial synthesis of metabolites with antihypertensive activity: aspects of fermentation derived inhibitors of angiotensin-converting enzyme (ACE).

In this review the microbial angiotensin-converting enzyme inhibitors are described. Especially from the microbiological point of view the characteristics of these metabolites are given, e.g. occurrence, fermentation physiology and specificity. Besides these data, the structure, assays and some isolation problems are summarised. Apart from ACE inhibition the different biological activities of these secondary metabolites are discussed.

Angiotensin-Converting Enzyme Inhibitors↗