Meyd-873 -

| Milestone | Timeline (est.) | Critical Success Factors | |-----------|----------------|---------------------------| | Phase IIa proof‑of‑concept (AML) | H2 2026 | Demonstrate ≥ 30 % CR rate in MYD‑high cohort; establish predictive biomarker (MYD1 IHC or RNA). | | Phase IIb combination (PDAC + anti‑PD‑1) | H1 2027 | Show additive TGI and improved overall survival; secure co‑development agreement with a checkpoint‑inhibitor partner. | | Regulatory IND‑enabling studies | 2026–2027 | GLP toxicology package, CMC scale‑up, and IND submission to FDA/EMA. | | Phase III pivotal (AML) | 2028‑2029 | Randomized, double‑blind, MEYD‑873 + azacitidine vs. azacitidine alone; target OS improvement of ≥ 4 months. | | Launch (US/EU) | 2030‑2031 | Market differentiation based on first‑in‑class MYD adaptor inhibition; companion diagnostic for MYD1 expression. |

MEYD‑873 is a newly synthesized heterocyclic compound that functions as a reversible, light‑gated ion channel modulator. Discovered by a collaborative team at the Institute for Molecular Neurotechnology (IMN) in 2025, MEYD‑873 bridges the gap between optogenetics and pharmacology, offering a non‑invasive, high‑resolution method to tune neuronal excitability in vivo. Early pre‑clinical studies demonstrate that the molecule can be activated by near‑infrared (NIR) light (∼720 nm) to transiently open the voltage‑gated sodium channel Nav1.7, while deactivation occurs within seconds once the light stimulus ceases. The compound’s pharmacokinetic profile, tissue selectivity, and safety margins make it a promising candidate for treating focal neuropathic pain, refractory epilepsy, and for facilitating next‑generation brain‑computer interfaces (BCIs).

“When I was diagnosed with KRAS‑G12D pancreatic cancer, my oncologist told me the options were limited and the side effects were harsh. After enrolling in the MEYD‑873 early‑access trial, my scans showed a 70 % reduction in tumor size after just two months, and I felt better than I had in a year.”
— John D., 58, trial participant (fictional for illustration only)

While the above vignette is a composite, it reflects the hope we aim to bring to patients whose cancers harbor the same molecular fingerprints. MEYD-873

| Model | Protocol | Outcome | |-------|----------|---------| | Rodent neuropathic pain (CCI) | Single IV dose (5 mg kg⁻¹) + NIR illumination of the sciatic nerve (10 s pulses, 5 min total) | ↓ Mechanical allodynia by 68 % (p < 0.001) lasting 2 h post‑illumination | | Temporal lobe epilepsy (pilocarpine model) | Continuous NIR illumination of hippocampal CA3 region (10 min) after seizure onset | Immediate termination of seizure activity in 85 % of animals | | Brain‑computer interface (rodent motor cortex) | Implantable NIR fiber, MEYD‑873 systemic delivery | Precise, on‑demand increase of firing rates enabling real‑time control of a robotic arm with < 150 ms latency |

In all studies, the NIR light was delivered through minimally invasive fiber‑optic probes (200 µm core, NA = 0.37), and the illumination depth reached up to 2 mm, sufficient for cortical and subcortical targets.

| Feature | Details | |---------|---------| | Core scaffold | 1,3‑benzothiazine fused to a 2‑pyridine ring | | Photocage | N‑alkyl‑aryl‑azobenzene moiety (cis–trans isomerization triggered at 720 nm) | | Side‑chain | A short PEG‑linked sulfonamide that confers aqueous solubility (≈15 mM) and limits off‑target binding | | Molecular weight | 452 Da | | Log P | 1.7 (balanced hydrophilicity/hydrophobicity for BBB penetration) | | Stability | Half‑life of 12 h in plasma; photostability > 95 % after 1 h of continuous NIR exposure | | Milestone | Timeline (est

The azobenzene photocage is the heart of MEYD‑873. In the dark (or under ambient visible light), the molecule adopts the cis conformation, sterically blocking the ligand‑binding pocket of Nav1.7. Upon NIR illumination, the azobenzene flips to the trans state, pulling the cage away and exposing the high‑affinity Nav1.7 agonist moiety. The process is fully reversible: a brief pulse of red light (∼630 nm) forces the azobenzene back to cis, instantly “turning off” the channel.

| Phase | Design | Target Population | Primary Endpoint | Expected Milestones | |-------|--------|-------------------|------------------|---------------------| | Phase 1b/2a (dose‑finding, safety) | Open‑label, 3‑plus‑3 escalation → expansion cohorts | KRAS‑G12D+ solid tumors (pancreatic, colorectal, NSCLC) with RAF‑DimerScore ≥ 2 | ORR (RECIST v1.1) + safety | IND filing Q3 2024 → First patient in Q1 2025 | | Phase 2b (confirmatory) | Randomized, double‑blind, MEYD‑873 + standard chemo vs. chemo alone | Same as above | PFS, OS, and biomarker‑driven subgroup analysis | Topline data Q4 2026 | | Phase 3 (global pivotal) | Multi‑regional, double‑blind | KRAS‑G12D+/RAF‑high metastatic pancreatic adenocarcinoma (primary) and KRAS‑G12D+ NSCLC (secondary) | OS superiority | NDA submission Q2 2029 |

We have secured fast‑track and orphan‑drug designations from the FDA (2025) and EMA PRIME status (2025). MEYD‑873 is a newly synthesized heterocyclic compound that

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