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Genmab — Marts 2018

Planlagt Fastgjort Låst Flyttet Genmab
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  • E Offline
    E Offline
    E_L
    wrote on sidst redigeret af
    #147

    I started with the Heineken. Didn't help. Then another Heineken. Nope. So then I tried the coffee. No luck. Now just waiting for Sukkeralf to explain it to us 😉

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    • P Offline
      P Offline
      Parasitism
      wrote on sidst redigeret af
      #148

      Jeg gider ikke engang prøve, når I to ikke kan udlede noget af det 😉

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      • BulderB Offline
        BulderB Offline
        Bulder
        wrote on sidst redigeret af
        #149

        Jeg prøver alligevel: Er det noget med at man kan bruge NK-celler fra raske donorer til at modvirke at mikromiljøet omkring tumorerne hæmmer patientens egne NK-cellers aktivitet? Dara udvirker ADCC via NK-cellerne, men disse hæmmes af visse faktorer i mikromiljøet. Tilførsel af fremmede NK-celler kan således forstærke effekten af dara. ??

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        • D Offline
          D Offline
          Doc4
          wrote on sidst redigeret af
          #150

          ...hvis nogen ønsker den fulde artikel...kræver STOR indsigt og viden om den meget specifikke terminology...https://sci-hub.hk/https://doi.org/10.1007/s00262-018-2140-1

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          • BulderB Offline
            BulderB Offline
            Bulder
            wrote on sidst redigeret af
            #151

            er jeg helt på vildspor, Doc4?

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            • D Offline
              D Offline
              Doc4
              wrote on sidst redigeret af
              #152

              ...og her er en ny oversigtsartikel...'CD38-targeting antibodies in multiple myeloma:
              mechanisms of action and clinical experience'....fuld artikel...https://sci-hub.hk/10.1080/1744666X.2018.1443809

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              • D Offline
                D Offline
                Doc4
                wrote on sidst redigeret af
                #153

                @Bulder..Min umiddelbare mening...tjae, nok noget;), men det er en særdeles vanskellig artikel og jeg har pt desværre ikke tid til nærlæsning:(. Dara, fx, i sig selv hæmmer/mindsker CD-38 receptorerne efter første infusion med 90%.

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                • G Offline
                  G Offline
                  gentogen
                  wrote on sidst redigeret af
                  #154

                  Jeg læser det som dig Bulder, men pointen er vist på sin vis lidt den omvendte, at NK-terapi kan understøttes af forskellige ADCC 'triggering antibodies', hvor Dara er et eksempel

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                  • BulderB Offline
                    BulderB Offline
                    Bulder
                    wrote on sidst redigeret af
                    #155

                    Jo, men problemet er at CD38 også udtrykkes på NK-cellerne, hvorved dara selv er med til at mindske effekten af ADCC, fordi dara slår nogle af NK-cellerne ihjel. Derfor tilførsel af donor-NK-celler som kan igen forstærke ADCC-processen.

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                    • BulderB Offline
                      BulderB Offline
                      Bulder
                      wrote on sidst redigeret af
                      #156

                      Fra Doc4's link: In summary, we showed in this study that the combination
                      of an ADCC triggering antibody and selection of KIRligand
                      mismatched donors is a potent and realistic platform
                      to potentiate the NK cell antitumor response in the TME.

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                      • Legolas23L Offline
                        Legolas23L Offline
                        Legolas23
                        wrote on sidst redigeret af
                        #157

                        Altså effekt i solide - i teorien ?

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                        • BulderB Offline
                          BulderB Offline
                          Bulder
                          wrote on sidst redigeret af
                          #158

                          Mere af samme skuffe: The antitumor potential of
                          NK cells can be applied by donor NK-cell infusion as well
                          as by haploidentical stem-cell transplantation.

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                          • BulderB Offline
                            BulderB Offline
                            Bulder
                            wrote on sidst redigeret af
                            #159

                            Der er altså - som jeg forstår det - en indbygget svaghed i dara, ved at dara selv slår (nogle af) de NK-celler ihjel, som den lige har trigget til at forårsage ADCC.

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                            • BulderB Offline
                              BulderB Offline
                              Bulder
                              wrote on sidst redigeret af
                              #160

                              Og til sidst: Therefore, we
                              envision that the combination of ADCC triggering antibodies
                              and KIR-ligand mismatching is a favorable combination
                              to be tested in future clinical studies, both in the context of
                              HaploSCT, potentially in combination with NK cell infusions,
                              as well as single donor NK-cell infusion. - Haplo... er transplantation.

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                              • BulderB Offline
                                BulderB Offline
                                Bulder
                                wrote on sidst redigeret af
                                #161

                                Og jeg antager - på linje med Lego - at dette har betydning ud over MM også i andre tumorer, hvor ADCC spiller en rolle.

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                                • Legolas23L Offline
                                  Legolas23L Offline
                                  Legolas23
                                  wrote on sidst redigeret af
                                  #162

                                  https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5728278/

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                                  • BulderB Offline
                                    BulderB Offline
                                    Bulder
                                    wrote on sidst redigeret af
                                    #163

                                    Tak Lego. In conclusion, our findings demonstrate that NK cells, which express high levels of CD38, are reduced by daratumumab treatment in a rapid, reversible, dose- and concentration-dependent manner. This reduction in NK-cell counts was not associated with response to daratumumab or PFS. In addition, reduction of NK cells was not associated with an increase in safety concerns or AEs, including infections.

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                                    • BulderB Offline
                                      BulderB Offline
                                      Bulder
                                      wrote on sidst redigeret af
                                      #164

                                      Så der er ikke den store negative effekt af dara's reduktion af NK-celler. Men det andet studie, som E L linkede til mener til gengæld at tilførsel af donor-NK-celler kan forstærke effekten.

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                                      • BulderB Offline
                                        BulderB Offline
                                        Bulder
                                        wrote on sidst redigeret af
                                        #165

                                        Altså forstærke dara's ADCC effekt.

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                                        • D Offline
                                          D Offline
                                          DevOp
                                          wrote on sidst redigeret af
                                          #166

                                          Tak Legolas. Ved reduktion af NK-celler ser der til gengæld ud til at være en opregulering af CD8+ T-celler, der beskytter mod tumor-vækst og udvikling af sekundære tumorer.

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