Wynik wyszukiwania w bazie Polska Bibliografia Lekarska GBL

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Liczba odnalezionych rekordów: 6



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Tytuł oryginału: Sex hormone-binding globulin polymorphisms in familial and sporadic breast cancer.
Autorzy: F”rsti Asta, Jin Quinren, Grzybowska Ewa, S”derberg Magnus, Zientek Helena, Siemińska Marzena, Rozgozińska-Szczepka Jadwiga, Chmielik Ewa, Utracka-Hutka Beata, Hemminki Kari
Źródło: Carcinogenesis 2002: 23 (8) s.1315-1320, il., tab., bibliogr. 37 poz.
Sygnatura GBL: 312,779

Hasła klasyfikacyjne GBL:
  • ginekologia i położnictwo
  • onkologia

    Typ dokumentu:
  • praca kliniczna
  • praca opublikowana za granicą
  • tytuł obcojęzyczny

    Wskaźnik treści:
  • ludzie
  • płeć żeńska

    Streszczenie angielskie: Ovarian steroids are one of the strongest risk factors for breast cancer. Sex hormone-binding globulin (SHBG) binds and transports sex steroids in the blood, regulating their bioavailable fraction and access to target cells. It can also inhibit the estradiol-induced proliferation of breast cancer cells through its membrane receptor. Three coding-region polymorphisms, which oead to an amino acid change, have been reported. We studied the influence of these three polymorphisms on breast cancer risk in three different populations: polish familial breast cancer cases, 27 p.c. of them carrying a BRCA1/BRCA2 mutation, Nordic familial and sporadic breast cancer cases. The reported G to A polymorphism in exon 1 was not found in the 423 analyzed samples. Instead, we found a C to T transition causing an arg to cys amino acid change within the same codon in one polish breast cancer patient and her daughter. Both of them were heterozygotes for the exon 8 to A polymorphism as well. They were diagnosed for bilateral breast cancer and carried a BRCA1 mutation (5382insC). Analysis of the tumor samples showed that they had lost the wild-type allele both at exons 1 and 8 of the SHBG gene. Analysis of the other Polish samples showed no correlation of the exon 8 polymorphism to breast cancer, bilateral breast cancer, BRCA1/BRCA2 mutations or age at diagnosis. No association of the exon 8 polymorphism with breast cancer in the Nordic familial or sporadic cases was found. The C to T polymorphism located in exon 4 was rare in all the studied populations (overal allele frequency 0.011)...

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    Tytuł oryginału: Expression of class III á-tubulin in neuroendocrine tumours of gastrointestinal tract.
    Autorzy: Jirasek Tomas, Mandys Vaclav, Viklicky Vladimir
    Źródło: Folia Histochem. Cytobiol. 2002: 40 (3) s.305-309, il., tab., bibliogr. 20 poz.
    Sygnatura GBL: 304,846

    Hasła klasyfikacyjne GBL:
  • gastroenterologia
  • onkologia

    Typ dokumentu:
  • praca kliniczna
  • tytuł obcojęzyczny

    Wskaźnik treści:
  • ludzie

    Streszczenie angielskie: Class III á-tubulin is regarded as a specific marker for the cells of neuronal origin as well as for the tumours originating from these cells. Its expression is considered one of the earliest events that appear in the cells revealing neuronal differentiation. Using monoclonal antibody TU-20 in an immunohistochemical analysis, we studied the expression of class III á-tubulin in gastrointestinal carcinoid tumours. Paraffin-embedded, formalin-fixed tissue sections from 49 tumour samples obtained from following locations: stomach (4 cases), small intestine (8 cases), appendix (18 cases), rectum (3 cases), pancreas (5 cases), liver metastases (7 cases) and lymph node metastases (4 cases) were used in the study. In 41 of the 49 tumour samples (83.7 p.c.), positive staining for class III á-tubulin was detected, while 8 tumour samples (16.3 p.c.) were negative. Expression of class III á-tubulin was prominent in all three rectal carcinoids and in three atypical caracinoids located in small intestine. Pancreatic neuroendocrine tumours revealed either weak immunostaining (2 cases), or were negative for this marker (3 cases). The intensity of class III á-tubulin immunolabelling was not related to the degree of tumour differentiation. The results of this study suggest that class III á-tubulin could be a perspective marker for gastrointestinal neuroendocrine tumours. Moreover, the differences in its expression could also elucidate some aspects of histogenetic relationships of neuroencodcrine tumours of gastrointestinal tract.

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    Tytuł oryginału: Soluble cytokine receptors in renal vasculitis and lupus nephritis.
    Autorzy: Tesar Vladimir, Jirsa jr Milan, Zima Tomas, Kalousova Marta, Bartunkova Jirina, Stejskalova Alena, Dostal Ctibor, Zabka Jiri
    Źródło: Med. Sci. Monitor 2002: 8 (1) s.BR24-BR29, tab., bibliogr. 49 poz.
    Sygnatura GBL: 313,278

    Hasła klasyfikacyjne GBL:
  • immunologia
  • nefrologia

    Typ dokumentu:
  • praca kliniczna
  • badanie porównawcze
  • tytuł obcojęzyczny

    Wskaźnik treści:
  • ludzie
  • dorośli 19-44 r.ż.
  • dorośli 45-64 r.ż.

    Streszczenie angielskie: Background: The activation of various cytokines, e.g. TNFŕ, IL-1 and/or IL-6, may play an important role in the pathogenesis of renal vasculitis and lupus nephritis (LN). The systemic effect of these cytokines may be modulated by their circulating soluble receptors. The plasma levels of cytokine receptors may thus also be markers of the activation of these cytokines. Material/Methods: The plasma levels of TNFŕ, its soluble receptor p75 (sTNF-RII), IL-6, and the soluble IL-6 receptor (sIL-6R) were measured using ELISA in 17 patients with ANCA-positive renal vasculitis (12 active - ANCA-A, 7 in remission ANCA-R), 9 patients with active lupus nephritis (LN), and 5 healthy subjects. Results: Patients with LN had increased plasma levels of TNFŕ, sTNF-RII, IL-6 and sIL-6R in comparison with controls. Patients with ANCA-A also had increased plasma levels of TNFŕ, sTNF-RII adn sIL-6R in comparison with controls, but the increases in the plasma level of IL-6 was not statistically significant, due to the large standard deviation. Patients with ANCA-R had increased plasma levels of sTNF-RII in comparison to controls, but the plasma levels of TNFŕ were significantly lower in ANCA-R than in NANCA-A. While the ratio of TNFŕ to sTNF-RII was significantly lower in all groups of patients than in the acontrols, the ratio of IL-6 to sIL-6R was significantly increased only in LN in comparison to controls. Conclusions: While increased plasma levels of TNFŕ may be a nonspecific marker of the activity of ANCA-positive renal vasculitis and LN...

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    Tytuł oryginału: Thermal effect of intravascular MR imaging using an MR imaging-guidewire: an in vivo laboratory and histopahtolgical evaluation.
    Autorzy: Yang Xiaoming, Yeung Christopher J., Ji Hongxiu, Serfaty Jean-Michel, Atalar Ergin
    Źródło: Med. Sci. Monitor 2002: 8 (7) s.MT113-MT117, il., tab., bibliogr. 16 poz.
    Sygnatura GBL: 313,278

    Hasła klasyfikacyjne GBL:
  • radiologia
  • hematologia
  • kardiologia

    Typ dokumentu:
  • badanie porównawcze
  • praca doświadczalna
  • tytuł obcojęzyczny

    Wskaźnik treści:
  • zwierzęta
  • króliki

    Streszczenie angielskie: Background: Intravascular magnetic resonance (MR) imaging to guide interventional procedures is a rapidly growing field. A primary concern with these new techniues is their thermal safety. The purpose of this study was to evaluate, in vivo, the thermal effect of an MR imagingguidewire (MRIG) for intravascular MR imaging (IV MRI). Material/Methods: Two indications of potentially adverse local heating were investigated: blood coagulation disorders and pathologica changes in target vessels. Experiments were performed on ten rabbits with a 1.5 T MR scanner. Using a 0.64-mm MRIG as the RF receiver, we imaged the target aorta using a fast spin-echo pulse sequence with an average spcific absorption rate (SAR) of 0.6 W/kg. The total MR imaging time was approximately 70 minutes. Results: There were no abnormal value changes of the coagulation factors between pre- and post-IV MRI, no clinical manifestations of blood coagulation disorders, and, histopathologically, no thermal damage in target vessels. Conclusions: This study demonstrates, from a pathophysiological point of view, the potenial safe use of the MR imaging-guidewire for intravascular MR imaging. Further study is required to precisely define the boundaries of these safe operating parameters.

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    Tytuł oryginału: Influence of losartan and enalapril on urinary excretion of 8-isoprostane in experimental nephrotic syndrome.
    Autorzy: Tesar Vladimir, Zima Tomas, Jirsa jr Milan, Crkovska Jirina, Stipek Stanislav, Vernerova Zdena, Serakova Marketa
    Źródło: Med. Sci. Monitor 2002: 8 (2) s.BR69-BR74, il., tab., bibliogr. 31 poz.
    Sygnatura GBL: 313,278

    Hasła klasyfikacyjne GBL:
  • farmacja
  • nefrologia

    Typ dokumentu:
  • badanie porównawcze
  • praca doświadczalna
  • tytuł obcojęzyczny

    Wskaźnik treści:
  • zwierzęta
  • szczury
  • płeć żeńska

    Streszczenie angielskie: Background: The increased permeability of the glomerular capillary wall in adriamycin nephropathy may be mediated by incrased generation of free radicals, possibility also by the non-enzymatic production of isoprostanes induced by oxidative stress. ACE inhiitors and angiotensin II antagonists may reduce proteinuria, perhaps by decreasing intraglomerular pressure and increasing the selective permeability of the glomerular capillary wall. Material/Methods: We compared the effect of an ACE inhibitor, enalapril, and an angiotensin II atagonist, losartan, on total malodialdehyde in blood and the urinary excretion of certain eicosanodids and their metabolites (TxB2, 6-keto-PGF1a, bicyclo-PGE2 and 8-isoprostane) in experimental adriamycin-induced nephrotic syndrome in rats. Results: Increased proteinuria in adriamycin-treated rats was not prevented by losartan, but tended to be partly mitigated by enalapril. However, both losartan and enalapril prevented the adriamycin-induced increase of total MDA in serum, but urinary excretion of 8-isoprostane was increased in nephrotic rats treated by losartan compared to controls. The enalapril-induced increase in urinary excretion of bicyclo-PGE2 was possibly mediated by kinins. Proteiuria positively correlated with urinary excretion of 8-isoprostane, and proteinuric rats also had a significantly higher urinary excretion of 8-isoprostane than non-proteinuric rats. Conclusions: Proteinuria in the acute phase of adriamycine nephropathy may be dependent on free radical generation and the formation of 8-isoprostane. The mild anitproteinuric effect of enalapril, but not losartan, may suggest the contributory role of the inhibiton of kinin degradation in the antiproteinuric action of enalapril in this model of nephrotic syndrome.

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    Tytuł oryginału: The TCR/CD3 complex: molecular interactions in a changing structure.
    Autorzy: Feito Maria Jos‚, Jim‚nez-Perianez Arturo, Ojeda Gloria, Sanchez Alejandra, Portol‚s Pilar, Rojo Jos‚ M.
    Źródło: Arch. Immunol. Ther. Exp. 2002: 50 (4) s.263-272, il., bibliogr. 94 poz.
    Sygnatura GBL: 304,223

    Hasła klasyfikacyjne GBL:
  • immunologia

    Typ dokumentu:
  • tytuł obcojęzyczny

    Streszczenie angielskie: The T cell receptor-CD3 (TCR/CD3) complex is a multichain structure in charge of antigen recognition in T cells. Despite many genetic, structural, and functional data obtained in recent years, essential questions concerning the TCR/CD3 complex still remain open, including: 1) the precise number of polypeptides in each TCR/CD3 complex, their interactions and spatial arrangement, 2) the role(s) of each polypeptide in antigen recognition and/or in receptor signal transmission, and 3) the relationship between the TCR/CD3 complex and other membrane or cytoplasmic molecules involved in downstream signaling. In this work we shall review data concerning some of these issues, proposing a model of the overall structure of the TCR/CD3 complex to explain its known features.

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