| 1. |
- Brönnegård, Mikael, et al.
(author)
-
Lack of evidence for estrogen and progesterone receptors in human adipose tissue.
- 1994
-
In: The Journal of steroid biochemistry and molecular biology. - 0960-0760. ; 51:5-6, s. 275-81
-
Journal article (peer-reviewed)abstract
- We have previously presented data indicating the absence of estrogen and progesterone receptors from human adipose tissue by the use of specific antibodies (Abbott) as well as specific ligands. In addition, specific estrogen and progesterone cRNA probes did not hybridize to any mRNA species in either abdominal or gluteal/femoral adipose tissue as demonstrated by solution hybridization and Northern blot. In order to demonstrate even extremely small quantities of gene products we have now used the Polymerase chain reaction-technique to study estrogen- and progesterone receptor gene expression. Sequences corresponding to each specific cDNA were demonstrated indicating small amounts of estrogen- and progesterone receptor mRNA not detected by RNA/RNA or RNA/TNA (total nucleic acids) hybridization assays. The estrogen receptor-regulated gene pS2, however, was not induced by estrogens in human adipose tissue in contrast to a significant increase in pS2 mRNA levels after estrogen exposure to the estrogen receptor(+) cell line MCF7. From these results we conclude that estrogen- and progesterone receptors are absent from human adipose tissue and that the extremely low level of transcription of the corresponding genes is not sufficient to allow translation of the message into functional proteins.
|
|
| 2. |
- Sylvén, Christer, et al.
(author)
-
Ventricular adenine nucleotide translocator mRNA is upregulated in dilated cardiomyopathy.
- 1993
-
In: Cardiovascular research. - 0008-6363. ; 27:7, s. 1295-9
-
Journal article (peer-reviewed)abstract
- OBJECTIVE: A disturbed energy transfer involving the adenine nucleotide translocator across the inner mitochondrial membrane has been suggested to be one specific pathogenetic mechanism in dilated cardiomyopathy. Pretranslational steady state expression of this protein in dilated cardiomyopathy was investigated. METHODS: Concentrations of adenine nucleotide translocator were quantified by solution hybridisation. The enzyme or protein expressions of citrate synthase, lactate dehydrogenase, and creatine kinase with isozymes were determined. Analysis was performed on specimens from the left and right ventricles from six organ donor hearts, six explanted hearts with dilated cardiomyopathy, two explanted hearts with ischaemic cardiomyopathy, and from papillary muscles from seven patients operated on for mitral regurgitation. RESULTS: The ejection fraction in patients with mitral regurgitation was 50(10)%, significantly higher (p < 0.001) than in patients with dilated cardiomyopathy (23(5))%. In mitral regurgitation and in ischaemic cardiomyopathy left ventricular adenine nucleotide translocator mRNA concentrations did not differ from those in donor hearts. In dilated cardiomyopathy, adenine nucleotide translocator mRNA concentrations were significantly increased (p < 0.001). Upregulation was more pronounced in right ventricular than in left ventricular myocardium (p < 0.01). The lactate dehydrogenase M subunit fraction was increased to a similar degree in dilated cardiomyopathy and in mitral regurgitation (p < 0.05). Citrate synthase activity was significantly decreased only in dilated cardiomyopathy (p < 0.005). On the other hand, the creatine kinase B subunit content was significantly higher in mitral regurgitation than in dilated cardiomyopathy (p < 0.001). CONCLUSIONS: Despite signs of increased anaerobic and depressed oxidative capacities, dilated cardiomyopathy was specifically characterised by pretranslational upregulation of adenine nucleotide translocator.
|
|
