top of page

Platform Technology

TRIDENT™: A Platform for 
Cytosolic Delivery

A delivery platform designed to move therapeutic payloads beyond endosomal entrapment and into the cytosol, where intracellular targets can be engaged and biological activity can occur.

SCROLL

The Delivery Challenge

Endosomal Entrapment Limits Therapeutic Activity

After cellular uptake, many therapeutics remain trapped in endosomal compartments, preventing access to intracellular targets and degradation machinery. As a result, systemic exposure does not reliably translate into biological effect.

Confined in Endosomes

Internalized payloads may enter cells but remain sequestered away from their site of action.

Exposure Without Activity

Systemic drug levels can be present without meaningful target engagement or functional response.

Illustration of cells representing intracellular drug delivery

Designed for Functional Cytosolic Delivery

TRIDENT™ is engineered to improve intracellular trafficking and enable cytosolic delivery, allowing payloads to reach the site of action inside the cell.

Improved Cellular Uptake

Enhances intracellular accumulation versus free payload.

Endosomal Escape

Supports release from endosomal compartments to enable cytosolic delivery.

Functional Target Engagement

Designed to translate delivery into measurable target engagement, degradation, and downstream pathway effects.

Mechanism of Action

How TRIDENT Delivers Inside the Cell

Following tumor accumulation and cellular uptake, TRIDENT™ is designed to overcome endosomal entrapment and release its payload into the cytosol. Cleavable linker chemistry then supports intracellular payload release at the site of action.

Why It Matters

Translational Impact

By addressing the gap between exposure and activity, TRIDENT™ is designed to improve the translational value of oncology programs across multiple modalities.

Increased Intracellular Exposure

More therapeutic reaches its intracellular site of action.

Improved Target
Engagement

Greater cytosolic delivery supports stronger and more consistent biological activity.

Potential to Expand Therapeutic Window

More selective delivery may widen the margin between efficacy and toxicity.

Asset Rescue
Potential

Programs limited by delivery rather than biology may be enabled through improved cytosolic delivery.

Platform Flexibility

Broad Modality Compatibility

TRIDENT is being evaluated across small molecules, protein degraders, biologics, and nucleic acid therapeutics where intracellular delivery remains a critical constraint.

Targeted Protein Degradation

PROTACs, molecular glues, and next-generation degraders all depend on cytosolic access. TRIDENT is specifically being evaluated for this modality as a primary focus.

Biologics (e.g., Nanobodies, Antibodies, ADCs/NDCs)

Nanobodies and antibodies depend on receptors for uptake and are often sequestered in endosomes or lysosomes, limiting cytosolic access. TRIDENT™ enables receptor-independent cytosolic delivery, allowing ADC- and NDC-format therapeutics to efficiently reach the cytosol, overcome low receptor expression, expand patient eligibility, and enhance efficacy.

Nucleic Acid Therapeutics

RNAi and ASO programs require cytosolic or nuclear access. TRIDENT's pH-responsive mechanism addresses the endosomal barrier common to nucleic acid delivery.

Targeted Chemotherapy

Tumor-selective delivery of cytotoxic payloads demonstrates the platform mechanism with validated preclinical data across uptake, escape, and functional activity.

Platform Impact

One Platform. A Multiplier Effect.

Our vision is to make functional intracellular delivery a solved problem — enabling entire classes of oncology therapies to reach their full clinical potential.

Partnership

Unlock Your Therapeutic’s Full Potential

Xelcis Bio™ is working with partners to evaluate TRIDENT™ as a delivery solution across oncology programs where cytosolic delivery is the limiting factor.

bottom of page