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Träfflista för sökning "WFRF:(Johansson C) "

Sökning: WFRF:(Johansson C)

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2551.
  • Johannsson, Oscar Thor, et al. (författare)
  • Founding BRCA1 Mutations in Hereditary Breast and Ovarian Cancer in Southern Sweden
  • 1996
  • Ingår i: American Journal of Human Genetics. - 0002-9297. ; 58:3, s. 441-450
  • Tidskriftsartikel (refereegranskat)abstract
    • Nine different germ-line mutations in the BRCA1 breast and ovarian cancer susceptibility gene were identified in 15 of 47 kindreds from southern Sweden, by use of SSCP and heteroduplex analysis of all exons and flanking intron region and by a protein-truncation test for exon 11, followed by direct sequencing. All but one of the mutations are predicted to give rise to premature translation termination and include seven frameshift insertions or deletions, a nonsense mutation, and a splice acceptor site mutation. The remaining mutation is a missense mutation (Cys61Gly) in the zinc-binding motif. Four novel Swedish founding mutations were identified: the nucleotide 2595 deletion A was found in five families, the C 1806 T nonsense mutation in three families, the 3166 insertion TGAGA in three families, and the nucleotide 1201 deletion 11 in two families. Analysis of the intragenic polymorphism D17S855 supports common origins of the mutations. Eleven of the 15 kindreds manifesting BRCA1 mutations were breast-ovarian cancer families, several of them with a predominant ovarian cancer phenotype. The set of 32 families in which no BRCA1 alterations were detected included 1 breast-ovarian cancer kindred manifesting clear linkage to the BRCA1 region and loss of the wild-type chromosome in associated tumors. Other tumor types found in BRCA1 mutation/haplotype carriers included prostatic, pancreas, skin, and lung cancer, a malignant melanoma, an oligodendroglioma, and a carcinosarcoma. In all, 12 of 16 kindreds manifesting BRCA1 mutation or linkage contained ovarian cancer, as compared with only 6 of the remaining 31 families (P < .001). The present study confirms the involvement of BRCA1 in disease predisposition for a subset of hereditary breast cancer families often characterized by ovarian cancers.
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2552.
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2553.
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2554.
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2555.
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2556.
  • Johansson, Alexandra C., et al. (författare)
  • Broadband calibration-free cavity-enhanced complex refractive index spectroscopy using a frequency comb
  • 2018
  • Ingår i: Optics Express. - : Optical Society of America. - 1094-4087. ; 26:16, s. 20633-20648
  • Tidskriftsartikel (refereegranskat)abstract
    • We present broadband cavity-enhanced complex refractive index spectroscopy (CE-CRIS), a technique for calibration-free determination of the complex refractive index of entire molecular bands via direct measurement of transmission modes of a Fabry-Perot cavity filled with the sample. The measurement of the cavity transmission spectrum is done using an optical frequency comb and a mechanical Fourier transform spectrometer with sub-nominal resolution. Molecular absorption and dispersion spectra (corresponding to the imaginary and real parts of the refractive index) are obtained from the cavity mode broadening and shift retrieved from fits of Lorentzian profiles to the individual cavity modes. This method is calibration-free because the mode broadening and shift are independent of the cavity parameters such as the length and mirror reflectivity. In this first demonstration of broadband CE-CRIS we measure simultaneously the absorption and dispersion spectra of three combination bands of CO2 in the range between 1525 nm and 1620 nm and achieve good agreement with theoretical models. This opens up for precision spectroscopy of the complex refractive index of several molecular bands simultaneously. 
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2557.
  • Johansson, Alexandra C., 1987-, et al. (författare)
  • Broadband Complex Refractive Index Spectroscopy via Measurement of Cavity Modes
  • 2018
  • Ingår i: 2018 Conference on Lasers and Electro-Optics (CLEO). - : IEEE. - 9781943580422
  • Konferensbidrag (refereegranskat)abstract
    • We retrieve high precision absorption and dispersion spectra of the 3v(1)+v(3) band of CO2 from direct measurement of cavity transmission modes using an optical frequency comb and a mechanical Fourier transfolin spectrometer with sub-nominal resolution.
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2558.
  • Johansson, Alexandra C., 1987-, et al. (författare)
  • Cavity-enhanced complex refractive index spectroscopy of entire molecular bands using a frequency comb
  • 2018
  • Ingår i: Optics InfoBase Conference Papers. - : Optica Publishing Group. - 9781943580477
  • Konferensbidrag (refereegranskat)abstract
    • We demonstrate broadband calibration-free complex refractive index spectroscopy of entire molecular bands by direct measurement of transmission modes of a Fabry-Perot cavity using frequency comb-based Fourier transform spectrometer with sub-nominal resolution.
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2559.
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2560.
  • Johansson, Anna C, et al. (författare)
  • Enhanced expression of iNOS intratumorally and at the immunization site after immunization with IFNgamma-secreting rat glioma cells
  • 2002
  • Ingår i: Journal of Neuroimmunology. - 1872-8421. ; 123:1-2, s. 135-143
  • Tidskriftsartikel (refereegranskat)abstract
    • Nitric oxide (NO) can modulate both tumor growth and antitumor immune responses. In order to elucidate the mechanism of curative therapeutic immunization with IFNgamma-producing glioma cells, we examined the expression of inducible nitric oxide synthase (iNOS) in tissue sections from immunized animals. There was a significantly enhanced iNOS expression both intratumorally and at the immunization site. Although the mechanisms behind this dual expression of iNOS most probably are different, our results suggest a role for NO in both the induction and execution of the antitumor response.
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