ADCs, targeted therapies, chemistry, biotech, pharma. Director @ Zymeworks

Joined October 2022
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🎉 It's an incredible honor and privilege to be named one of the 2024 PharmaVoice 100 by @PharmaVoice, alongside so many talented and inspiring leaders in the life sciences industry! 🎉 Check out the full list of this year #PharmaVoice100 honorees here: pharmavoice.com/news/pv100-p…
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ABBV-706 (SEZ6 Topo1i ADC) in R/R SCLC and other solid tumors. Phase 1 data published in @NatureMedicine Responses were seen across all SEZ6 expression levels. No correlation of SEZ6 expression was observed with PFS and OS based on median H-score. nature.com/articles/s41591-0…
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Iza-Bren is very effective (not only in TNBC) but its profile is also very chemo-like. What’s the targeted contribution vs non-specific uptake? Iza-Bren half-life is ~1 day! What’s the correlation with EGFR expression? HER3 expression? Co-expression of both EGFR and HER3?
Impressive results from a phase 3 trial of Iza-Bren (anti-HER3/EGFR TOPO1 ADC) vs chemo in pretreated mTNBC, with improvement in PFS and OS. High rate of hematologic toxicities, including 5% febrile neutropenia. Phase 3 ongoing to confirm these results in a global population.
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Not all the ADCs are identical. Known target (Nectin4) and payload (exatecan). “The EXCEED study didn’t identify a dose that was both tolerable and efficacious. Without a clear therapeutic window, development was discontinued” LY4101174 (ETx-22) came from Emergence acquisition
EXCEED #ASCO26: LY4101174 = More data on Nectin4/Topo1 ADCs in 86 patients with pretreated advanced UC . RRs 20% is lower than expected while haem tox was high. Efficacy and toxicity balance doesn’t support further development. Yesterdays data (LY405 same payload/target) has ⬆️ efficacy and is a preferential agent for R3 development IMO. Not all ADCs with matching target and payload are the same.@OncoAlert
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Raffaele Colombo retweeted
Standing ovation for the RASolute302 trial results! @UTMDAnderson @KRASKickers #ASCO26 @RevMedicines
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Raffaele Colombo retweeted
May 30
The Topo1 ADC tsunami in ADCs #ASCO26
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Raffaele Colombo retweeted
Data on nectin-4/Topo-1 ADC (LY405) #ASCO26. @IyerGopa RR= 42% (n=48). RRs are maintained after prior Nectin-4 targeting but not after prior Topo1 payload exposure. Resistance is therefore mainly payload orientated. Sequencing Nectin4 ADCs requires R3 trials, but look imporant. LY405 is metabolized by CYP2D6. Absence of CYP2D6 (~10%) led to serious toxicity. Measuring CYP2D6 is straightforward but important for this drug . @OncoAlert
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Raffaele Colombo retweeted
Don’t miss the #ASCO26 educational session on ADCs tomorrow afternoon!
Dr. Paolo Tarantino (@PTarantinoMD) will be discussing combining and sequencing #AntibodyDrugConjugates with targeted agents in tomorrow's #ASCO26 education session on #ADCs. 🗓️Saturday, May 30 ⏰ 4:45 – 5:00 PM CDT (5:45 – 6:00 PM EST) 📍 Hall D2
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Infographic of CD123 ADCs that have entered clinical development: 5 different payload classes, 4 discontinued! From my talk @ Joint International Conference Innovation in Oncology (x.com/FondazioneBona1/status…) Figure updated to reflect PVEK approval! (preclinical ADCs not shown)
FDA approves pivekimab sunirine [PVEK, IMGN632] based on CADENZA trial! CD123‐targeting antibody with DGN549 payload. 15th ADC approved by FDA 20th ADC worldwide 1st CD123 ADC 1st IGN payload (similar to PBD) prnewswire.com/news-releases…
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🚨 39 oral and rapid oral ADC abstracts will be presented at #ASCO26 (up from 36 abstracts in 2025)! ADC-related posters (excluding trial in progress) jumped from 78 in 2025 to 119 in 2026! Here all the 39 oral and rapid oral presentations 👇 @ASCO #ADCs
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For the 15 new ADCs that will be presented at #ASCO26, see: x.com/raffcolo/status/205515…

Only 2 weeks until the 2026 @ASCO Annual Meeting in Chicago! >275 abstracts on ADCs, including almost 40 oral/rapid oral presentations. 👇Here the list of the 15 ADCs that will be presented for the first time at #ASCO26!
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New indication for Datroway! FDA approved Dato-DXd for 1L TNBC patients not eligible for PD-(L)1 inhibitors! fda.gov/drugs/resources-info…
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Raffaele Colombo retweeted
🚨Delighted to deliver a lecture at the #ASCO26 Clinical Science Symposium Session on one of the most exciting frontiers in sarcoma therapeutics @ASCO 🖖"To Boldly Deliver Where No Drug Has Gone Before: Antibody-Drug Conjugates in Sarcoma" 👉ADCs have transformed the treatment landscape across breast, lung, gastric, & urothelial cancers. 👉The question now, can we BOLDLY deliver this precision-guided payload paradigm to #sarcoma a family of >100 rare ultra-rare histologies long underserved by drug development? 👉Join us for a deep dive into the science, the targets, the trials, and what's next and amazing speakers. 🗓️ Monday, June 1, 2026 | 8:00–9:30 AM CDT 📍 Room S504, McCormick Place ⚠️ In-person only @OncoAlert @oncodaily @OpenMedicineHQ 🔗 meetings.asco.org/meetings/2…
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For those who enjoy a little bit of ADC chemistry!
🆕 article in press: Preclinical characterization and phase 1 results of TQB2102, a first-in-class HER2 biparatopic antibody-drug conjugate, in patients with advanced solid tumors doi.org/10.1016/j.annonc.202…
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While the data are encouraging, the discussion of TQB2102 stability is incorrect. The percentage of payload release in plasma does not capture all aspects of ADC instability. We discussed in our recent work: annalsofoncology.org/article… Nothing wrong with not being perfectly stable!
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While the data are encouraging, the discussion of TQB2102 stability is incorrect. The percentage of payload release in plasma does not capture all aspects of ADC instability. We discussed in our recent work: annalsofoncology.org/article… Nothing wrong with not being perfectly stable!
🆕 article in press: Preclinical characterization and phase 1 results of TQB2102, a first-in-class HER2 biparatopic antibody-drug conjugate, in patients with advanced solid tumors doi.org/10.1016/j.annonc.202…
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Also note the biparatopic antibody name ending with "-mig" suffix. (-mig = Multispecific ImmunoGlobulins)
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Only 2 weeks until the 2026 @ASCO Annual Meeting in Chicago! >275 abstracts on ADCs, including almost 40 oral/rapid oral presentations. 👇Here the list of the 15 ADCs that will be presented for the first time at #ASCO26!
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Different targets and some novel bispecific ADCs The payload class of these ADCs (all Topo1i) clearly reflects the current landscape and the marked growth of camptothecin (Topo1i) ADCs in the clinic (>200!!) Figure from our recent @Annals_Oncology paper: annalsofoncology.org/article…
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All abstracts and sessions: asco.org/annual-meeting/sear… Abstracts texts will be available next week on May 21!

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