Juq-565 【Proven ✰】

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4.3 Comparison with Conventional QKD

| Protocol | Max. Distance (km) | Key Rate (Gbps) | QBER Tolerance | |--------------|------------------------|---------------------|----------------------| | BB84 (polarization) | 100 | 0.2 | 11 % | | Decoy‑State BB84 (d = 2) | 150 | 0.5 | 11 % | | JUQ‑565 (d = 11) | 200 | 12.3 | ≈30 % | I notice "JUQ-565" appears to be a label

JUQ‑565 surpasses the key‑generation capabilities of state‑of‑the‑art BB84 systems by more than an order of magnitude while tolerating a substantially higher error budget.

2. Theoretical Foundations

5.3 Post‑Quantum Compatibility

Since the quantum layer already offers information‑theoretic security, the addition of a lattice‑based authentication layer ensures that the overall system remains secure even if future advances compromise the underlying lattice assumptions. This defense‑in‑depth approach aligns with the recommendations of the National Institute of Standards and Technology (NIST) for quantum‑ready infrastructures.

1. Introduction

The PI3K‑Akt signaling cascade is a central node regulating cell growth, survival, and metabolism. Hyperactivation of PI3Kα—commonly driven by PIK3CA mutations or PTEN loss—is a hallmark of many solid tumors, notably triple‑negative breast cancer (TNBC) where therapeutic options remain limited. While several PI3Kα inhibitors have entered clinical testing (e.g., alpelisib), dose‑limiting toxicities and limited efficacy in TNBC underscore the need for novel agents with improved selectivity, pharmacokinetics, and combinatorial potential. a proprietary product or internal project code, a

JUQ‑565 emerged from a phenotypic screen of ~2 × 10⁶ small molecules designed to suppress Akt phosphorylation in a PIK3CA‑mutant TNBC line (MDA‑MB‑468). Preliminary hits exhibited a quinazolinone‑pyridine core, prompting a focused SAR campaign that culminated in JUQ‑565 (Figure 1). The molecule combines a 4‑fluorophenyl substituent at the quinazolinone C‑2 position with a 2‑pyridyl‑methyl side chain, conferring high affinity for the ATP‑binding pocket of PI3Kα while minimizing off‑target kinase interactions.

In this paper we provide a detailed account of (i) the convergent synthetic route to JUQ‑565, (ii) in‑vitro pharmacology and SAR expansion, (iii) ADME and pharmacokinetic (PK) characterization, (iv) efficacy in orthotopic xenograft models, and (v) mechanistic insights into synergy with DNA‑damaging agents. The work demonstrates that JUQ‑565 fulfills key criteria for a first‑in‑class, orally active PI3Kα inhibitor with a therapeutic window suitable for further clinical development.