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Sökning: WFRF:(Gorecki A)

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  • Myszkowska, D., et al. (författare)
  • Unusually high birch (Betula spp.) pollen concentrations in Poland in 2016 related to long-range transport (LRT) and the regional pollen occurrence
  • 2021
  • Ingår i: Aerobiologia. - : Springer Science and Business Media LLC. - 0393-5965 .- 1573-3025. ; 37:3, s. 543-559
  • Tidskriftsartikel (refereegranskat)abstract
    • In 2016, the highest birch (Betula spp.) pollen concentrations were recorded in Krakow (Poland) since the beginning of pollen observations in 1991. The aim of this study was to ascertain the reason for this phenomenon, taking the local sources of pollen in Poland and long-range transport (LRT) episodes associated with the pollen influx from other European countries into account. Three periods of higher pollen concentrations in Krakow in 2016 were investigated with the use of pollen data, phenological data, meteorological data and the HYSPLIT numerical model to calculate trajectories up to 4 days back (96 h) at the selected Polish sites. From 5 to 8 April, the birch pollen concentrations increased in Krakow up to 4000 Pollen/m(3), although no full flowering of birch trees in the city was observed. The synoptic situation with air masses advection from the South as well as backward trajectories and the general birch pollen occurrence in Europe confirm that pollen was transported mainly from Serbia, Hungary, Austria, the Czech Republic, Slovakia, into Poland. The second analyzed period (13-14 April) was related largely to the local flowering of birches, while the third one in May (6-7 May) mostly resulted from the birch pollen transport from Fennoscandia and the Baltic countries. Unusual high pollen concentrations at the beginning of the pollen season can augment the symptomatic burden of birch pollen allergy sufferers and should be considered during therapy. Such incidents also affect the estimation of pollen seasons timing and severity.
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  • Carter, Jessica A., et al. (författare)
  • CpG dinucleotide-specific hypermethylation of the TNS3 gene promoter in human renal cell carcinoma
  • 2013
  • Ingår i: Epigenetics. - : Informa UK Limited. - 1559-2294 .- 1559-2308. ; 8:7, s. 739-747
  • Tidskriftsartikel (refereegranskat)abstract
    • Tensin3 is a cytoskeletal regulatory protein that inhibits cell motility. Downregulation of the gene encoding Tensin3 (TNS3) in human renal cell carcinoma (RCC) may contribute to cancer cell metastatic behavior. We speculated that epigenetic mechanisms, e.g., gene promoter hypermethylation, might account for TNS3 downregulation. In this study, we identified and validated a TNS3 gene promoter containing a CpG island, and quantified the methylation level within this region in RCC. Using a luciferase reporter assay we demonstrated a functional minimal promoter activity for a 500-bp sequence within the TNS3 CpG island. Pyrosequencing enabled quantitative determination of DNA methylation of each CpG dinucleotide (a total of 43) in the TNS3 gene promoter. Across the entire analyzed CpG stretch, RCC DNA showed a higher methylation level than both non-tumor kidney DNA and normal control DNA. Out of all the CpGs analyzed, two CpG dinucleotides, specifically position 2 and 8, showed the most pronounced increases in methylation levels in tumor samples. Furthermore, CpG-specific higher methylation levels were correlated with lower TNS3 gene expression levels in RCC samples. In addition, pharmacological demethylation treatment of cultured kidney cells caused a 3-fold upregulation of Tensin3 expression. In conclusion, these results reveal a differential methylation pattern in the TNS3 promoter occurring in human RCC, suggesting an epigenetic mechanism for aberrant Tensin downregulation in human kidney cancer.
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  • Tillett, W, et al. (författare)
  • DYNAMICS OF NAIL PSORIASIS WITH GUSELKUMAB TREATMENT AND WITHDRAWAL IN ASSOCIATION WITH SKIN RESPONSE AND PATIENT-REPORTED OUTCOMES: A POST HOC ANALYSIS OF THE VOYAGE 2 PHASE 3 TRIAL
  • 2022
  • Ingår i: ANNALS OF THE RHEUMATIC DISEASES. - : BMJ. - 0003-4967 .- 1468-2060. ; 81, s. 830-830
  • Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
    • Nail psoriasis can be difficult to treat, affects ~50% of patients with psoriasis and can involve the nail matrix (pitting, leukonychia) and/or nail bed (onycholysis, splinter haemorrhages). Evidence suggests nail psoriasis may be associated with risk of developing psoriatic arthritis, in particular distal interphalangeal joint erosion.1–3 Data to Week (Wk) 24 from VOYAGE 1 and 2, two Phase 3 clinical trials, indicate that the anti-interleukin-23 monoclonal antibody guselkumab (GUS) is more effective than placebo and as effective as adalimumab in treating nail psoriasis.4 Furthermore, GUS is also associated with maintained Psoriasis Area and Severity Index (PASI) following treatment withdrawal in VOYAGE 2; however, nail response is not as well understood in this context.5ObjectivesThis VOYAGE 2 post hoc analysis evaluated nail response and its association with skin response and patient-reported outcomes (PROs) in two groups, one experiencing GUS withdrawal and the other receiving continuous GUS.MethodsPatients had moderate-to-severe plaque psoriasis and nail psoriasis, were initially randomised to GUS, and achieved PASI 90 at Wk 28. Patients were then re-randomised to placebo (GUS withdrawal) or GUS every 8 wks (GUS continuation). Nail Psoriasis Severity Index (NAPSI; grading the most affected nail), fingernail Physician’s Global Assessment (f-PGA), PASI and Dermatology Life Quality Index (DLQI) are reported as observed at Wk 0, 16, 24 and 48.ResultsAmong 209 patients, NAPSI, f-PGA, PASI and DLQI showed similar trends in both groups until Wk 24. All endpoints improved from baseline; and at Wk 24, patients in the GUS withdrawal and GUS continuation groups achieved a mean NAPSI of 1.7 and 1.8 (nail matrix 1.0 and 1.0; nail bed 0.7 and 0.8); f-PGA 0.9 and 0.9; PASI 0.6 and 0.6; and DLQI 2.2 and 2.3, respectively (Table 1). Nail changes continued to follow skin trends through Wk 48 (Figure 1); with GUS withdrawal, worsening of PASI and DLQI was proportionally greater than that of NAPSI and f-PGA; with GUS continuation, PASI and DLQI remained fairly stable, and NAPSI and f-PGA continued to improve. Nails were numerically slower to respond to GUS initiation and withdrawal than skin, with a more pronounced delay for nail matrix vs nail bed. In patients who sustained a PASI 90 response at Wk 48, despite GUS withdrawal, a high level of nail response was also maintained.Table 1.NAPSI, f-PGA, PASI and DLQI through Wk 48 in GUS withdrawal and GUS continuation groupsWk 0Wk 16Wk 24Wk 28Wk 48GUS withdrawal*GUSRPlacebon97969696NAPSI5.0 (2.1)2.5 (1.9)1.7 (1.9)1.9 (2.1)Nail matrix2.7 (1.3)1.5 (1.3)1.0 (1.2)0.9 (1.3)Nail bed2.2 (1.2)0.9 (1.0)0.7 (1.0)1.0 (1.1)n98979797f-PGA2.5 (0.8)1.3 (0.9)0.9 (0.8)1.1 (1.0)n101101100100PASI23.1 (9.0)1.3 (2.7)0.6 (1.4)5.2 (6.1)n101101100100DLQI14.5 (6.1)2.8 (4.1)2.2 (3.6)7.0 (7.4)GUS continuationGUSRGUSn108106107105NAPSI4.4 (1.8)2.4 (2.2)1.8 (2.0)1.2 (1.6)Nail matrix2.5 (1.2)†1.4 (1.3)1.0 (1.2)0.7 (1.0)Nail bed1.9 (1.2)1.0 (1.1)0.8 (1.0)0.5 (0.8)n108106107105f-PGA2.4 (0.9)1.1 (0.9)0.9 (0.9)0.7 (0.8)n108108108106PASI22.6 (8.8)1.2 (2.1)0.6 (1.1)1.3 (3.5)n107108108104DLQI14.3 (6.4)2.9 (4.2)2.3 (4.0)1.8 (3.4)Data are mean (standard deviation). *n=10 reinitiated GUS upon loss of 50% of Wk 28 PASI 90(at n=1 Wk 36, n=2 Wk 40, n=7 Wk 44); †n=107; R, re-randomisation of PASI 90 responders.ConclusionGUS treatment through Wk 48 improved nail psoriasis, skin psoriasis and PROs. When GUS was withdrawn, loss of response was slower in nails vs skin. These findings support that nail outcomes follow skin outcome trends with GUS treatment and that nail outcomes should contribute to evaluation of treatment efficacy and disease progression.2,3,6References[1]Robert B. Dermatology 2010; 221 Suppl 1: 1–5;[2]Antony A et al. J Rheumatol 2019; 46: 1097–102.[3]Wilson F et al. Arthritis Rheum 2009; 61: 233–39;[4]Foley P et al. JAMA Dermatol 2018; 154: 676–83;[5]Conrad C et al. AAD 2021. P26573.[6]Conrad C et al. Dermatol Ther 2022; 12: 233–41.AcknowledgementsThis analysis was funded by Janssen and medical writing support was provided by OPEN Health Medical Communications.Disclosure of InterestsWilliam Tillett Speakers bureau: Abbvie, Amgen, Eli Lilly, Janssen, Novartis, Pfizer and UCB, Consultant of: Abbvie, Amgen, Eli Lilly, Janssen, Novartis, Pfizer and UCB, Grant/research support from: Abbvie, Amgen, Eli Lilly, Janssen, Novartis, Pfizer and UCB, Alexander Egeberg Speakers bureau: AbbVie, Almirall, Leo Pharma, Zuellig Pharma Ltd., Galápagos NV, Sun Pharmaceuticals, Samsung Bioepis Co., Ltd., Pfizer, Eli Lilly and Company, Novartis, Union Therapeutics, Galderma, Dermavant, UCB, Mylan, Bristol-Myers Squibb, and JanssenPharmaceuticals, Consultant of: AbbVie, Almirall, Leo Pharma, Zuellig Pharma Ltd., Galápagos NV, Sun Pharmaceuticals, Samsung Bioepis Co., Ltd., Pfizer, Eli Lilly and Company, Novartis, Union Therapeutics, Galderma, Dermavant, UCB, Mylan, Bristol-Myers Squibb, and JanssenPharmaceuticals, Grant/research support from: Pfizer, Eli Lilly, Novartis, Bristol-Myers Squibb, AbbVie, Janssen Pharmaceuticals, the Danish National Psoriasis Foundation, the Simon Spies Foundation, and the Kgl Hofbundtmager Aage Bang Foundation, Enikö Sonkoly Speakers bureau: AbbVie, Eli Lilly, UCB, Janssen, Novartis, Sanofi and LEO Pharma, Grant/research support from: Pfizer, Patricia Gorecki Employee of: Janssen, Anna Tjärnlund Employee of: Janssen, Jozefien Buyze Employee of: Janssen, Sven Wegner Employee of: Janssen, Dennis McGonagle Speakers bureau: Abbvie, BMS, Celgene, Janssen, Novartis, Lilly, UCB, Grant/research support from: Abbvie, BMS, Celgene, Janssen, Novartis, Lilly, UCB
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  • Leiding, Thom, et al. (författare)
  • Precise detection of pH inside large unilamellar vesicles using membrane-impermeable dendritic porphyrin-based nanoprobes.
  • 2009
  • Ingår i: Analytical Biochemistry. - : Elsevier BV. - 1096-0309 .- 0003-2697. ; 388, s. 296-305
  • Tidskriftsartikel (refereegranskat)abstract
    • Accurate real-time measurements of proton concentration gradients are pivotal to mechanistic studies of proton translocation by membrane-bound enzymes. Here we report a detailed characterization of the pH-sensitive fluorescent nanoprobe Glu(3), which is well suited for pH measurements in microcompartmentalized biological systems. The probe is a polyglutamic porphyrin dendrimer in which multiple carboxylate termini ensure its high water solubility and prevent its diffusion across phospholipid membranes. The probe's pK is in the physiological pH range, and its protonation can be followed ratiometrically by absorbance or fluorescence in the ultraviolet (UV)-visible spectral region. The usefulness of the probe was enhanced by using a semiautomatic titration system coupled to a charge-coupled device (CCD) spectrometer, enabling fast and accurate titrations and full spectral coverage of the system at millisecond time resolution. The probe's pK was measured in bulk solutions as well as inside large unilamellar vesicles in the presence of physiologically relevant ions. Glu(3) was found to be completely membrane impermeable, and its distinct spectroscopic features permit pH measurements inside closed membrane vesicles, enabling quantitative mechanistic studies of membrane-spanning proteins. Performance of the probe was demonstrated by monitoring the rate of proton leakage through the phospholipid bilayer in large vesicles with and without the uncoupler gramicidin present. Overall, as a probe for biological proton translocation measurements, Glu(3) was found to be superior to the commercially available pH indicators.
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