H2AK119ub

H2AK119ub t1_ixwt3px wrote

> Chemo for different cancers is going to be different too. My dad died of GBM 2.5 years ago, just a year after diagnosis. He was a personal trainer, in better shape than anyone I know, when he was diagnosed at 58 years old. 6 months later, he was a shell of himself and barely tolerating chemo. I’ve been watching dcvax since he was diagnosed, hoping they’d fast track fda approval and he could get it. > >

Big hugs. Sorry for your loss.

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H2AK119ub t1_ixwrw26 wrote

Your control arm in a clinical trial can be placebo, standard of care (SOC), watch and wait, or a combination. The FDA has approved first in class medicines in high unmet need populations using ph1, single arm, non-randomized/blinded trials; they have stated recently they will probably do this no longer which is causing a big stir in pharma/biotech space. The DCVAX trial was plagued by many issues. Pseudo-progression of patients being a major one. They had to change the efficacy readout from PFS (time to disease progression) to OS (death) because they could not accurately readout from MRI's if people were getting better due to pseudo-progression. This is probably why the trial was so long.

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H2AK119ub t1_ixwrb6q wrote

Not sure why you've focused on (mostly) old drugs and kinase inhibitors (known to be very dirty). Vemurafenib (BRAFi) is indicated and used in melanoma not NSCLC (another first for FBDD), Crizotinib (ALKi) is focused on ALK fusions, Trodelvy is a first in class ADC, Trastuzumab makes billions annually and is SOC in HER2+ breast cancer, and cetuximab is an old EGFR mAb that has been mostly supplanted by anti-VEGF mAb's in CRC (with FOLFOX chemo).

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H2AK119ub t1_ixv2z62 wrote

A total of 331 patients were enrolled in the trial, with 232 randomized to the DCVax-L group and 99 to the placebo group. Median OS (mOS) for the 232 patients with nGBM receiving DCVax-L was 19.3 (95% CI, 17.5-21.3) months from randomization (22.4 months from surgery) vs 16.5 (95% CI, 16.0-17.5) months from randomization in control patients (HR = 0.80; 98% CI, 0.00-0.94; P = .002). Survival at 48 months from randomization was 15.7% vs 9.9%, and at 60 months, it was 13.0% vs 5.7%. For 64 patients with rGBM receiving DCVax-L, mOS was 13.2 (95% CI, 9.7-16.8) months from relapse vs 7.8 (95% CI, 7.2-8.2) months among control patients (HR, 0.58; 98% CI, 0.00-0.76; P < .001). Survival at 24 and 30 months after recurrence was 20.7% vs 9.6% and 11.1% vs 5.1%, respectively. Survival was improved in patients with nGBM with methylated MGMT receiving DCVax-L compared with external control patients (HR, 0.74; 98% CI, 0.55-1.00; P = .03).

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H2AK119ub t1_ixuy1j6 wrote

I don't really understand your points. Current IO therapies don't work in GBM because it is a very heterogenous tumor type (not clonal like heme is) and there are few T cells in the brain for the MOA of checkpoint inhibitors to work. TAM reeducation is the closest a generic, non-personalized IO therapy could have for a decent shot on goal in this indication.

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H2AK119ub t1_ixuv0h5 wrote

IO therapies have all bombed in GBM. GBM tumors are distinct to other cancer settings where IO has succeeded - eg., heme (ie, CAR-T) & inflamed tumors (anti-PD(L)1 mAbs). This one is interesting in that it uses the heterogeneity of the tumor itself (tumor lysate) to "educate" the immune cells (DC's).

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H2AK119ub t1_ixuum3x wrote

An interesting study and a long running one (this study started in 2007 and finished recruiting in 2017). "Educating" dendritic cells with tumor lysate to give them "memory" to go and attack tumor cells. I'm not a fan of the controls (historical, external) or the study design (cross over) that were used in the trial but you can make a strong case that a placebo arm is unethical in GBM or any recurrent high grade tumor. Data are promising; this could be the first treatment to be added to frontline care in high grade gliomas after nearly two decades of failed trials.

https://jamanetwork.com/journals/jamaoncology/fullarticle/2798847

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