Alpha-helical Splinter peptide engaging the growth hormone receptor

Biospecific therapies · Human & animal health

Splinter® Peptides

Biased somatotropin receptor agonism: fat synthesis off, tissue repair on — from a single molecule class.

Bioengineered peptides under 30 amino acids, selected for clinical effect and safety — biospecific therapies for human and animal health without the diabetogenic cost of rhGH.

The clinical gap

Today's anabolic and metabolic tools force a trade-off

Recombinant hGH

Efficacy at the price of systemic risk

  • Hyperinsulinemia, insulin resistance, T2D risk
  • Oncologic caution in survivors (IGF-1 elevation)
  • Edema, arthralgia, carpal tunnel — adherence loss
  • High cost and cold chain limit real-world access

GLP-1 era

Weight comes off — so does muscle

  • 25–40% of weight lost is lean mass in reported series
  • Sarcopenic-obesity phenotype in older, comorbid patients
  • No approved companion therapy to protect muscle during titration

Sources: Mekala & Tritos, JCEM 2009 · Reed et al., Front Endocrinol 2013 · Di Somma et al., JCM 2023

Mechanism

A metabolic switch, not a hormone replacement

Biased agonism

Signal selection at Site 1

Binds the somatotropin receptor and activates STAT5/mTOR regenerative signalling without engaging diabetogenic routes.

  • Fewer metabolic side effects

Lipogenic shut-off

Fat synthesis switched off

Direct down-regulation of SCD1 and ELOVL6 (−2.11 logFC at 72 h) blocks lipogenesis at the cell level.

  • Hepatic and adipose benefit

Anabolic pulse

Repair machinery switched on

Up-regulation of RPL29 and ribosomal machinery drives protein synthesis, muscle sparing and tissue repair.

  • Lean mass preservation

Synthetic α-helical peptides under 30 aa, bioprospected from aquatic species and refined through our bioengineering pipeline — a selection process that isolates viable molecules with demonstrated clinical effect before they enter phased studies. One receptor, two coordinated outputs: a repair arm and a metabolic arm.

Evidence to date

Pre-clinical validation supporting the mechanism

673

Significant shifts at 72 h

6.1×

Increase in anabolism

87%

Ribosomal activation

2 labs

Independent confirmation

Key bioactivity and safety assays were performed in two independent laboratories, with concordant direction and magnitude across replicates.

Safety signal

0% cytotoxicity

No cytotoxicity in HeLa lines at concentrations far above physiological levels.

Bioactivity

Proliferation within 72 h

Increased cell proliferation with ECM and collagen pathway enrichment.

Dosing design

Half-life extended >400×

Acylation plus albumin-depot engineering enables weekly administration.

In silico screening of 29 peptides · lead candidate SEQ ID NO:5 · assays performed in two independent laboratories with consistent results.

Our process

Bioengineering that selects for viability and clinical effect

Every Splinter® peptide advances through a disciplined pipeline designed to deliver one thing: a therapeutic tool that is viable, safe and worthy of clinical confidence.

01 · Discovery

Bioprospecting & design

Biospecific candidate peptides identified from aquatic biodiversity and engineered for the target receptor.

02 · Selection

In silico & in vitro screening

Bioengineering filters keep only molecules with viable binding, bioactivity and zero cytotoxicity.

03 · Validation

Proteomic proof of effect

Quantitative proteomics confirms the clinical effect at the cellular level before any animal study.

04 · Phased studies

Confidence through evidence

Staged toxicology, in vivo and optimisation studies build the safety case for a viable therapeutic tool.

Clinical applications

Biospecific therapies for human and animal health

Each peptide is aimed at a defined health problem — metabolic, regenerative or cytoprotective — in human and veterinary medicine.

Metabolic

Liver & obesity

  • MASH / MASLD
  • Type 2 diabetes comorbidity
  • Lipogenesis inhibition

Animal health

Veterinary applications

  • Metabolic disorders in production & companion animals
  • Wound and tissue repair
  • Biospecific peptides per species

Regenerative

Tissue repair

  • Chronic wound healing
  • Diabetic foot ulcers
  • Controlled tissue anabolism

Adjunct to GLP-1

Muscle sparing

  • Lean mass during weight loss
  • Sarcopenic obesity
  • Post-titration maintenance

Dermal / cytoprotection

Skin & defence

  • Anti-apoptotic protection
  • Antioxidant defence
  • Skin rejuvenation

Scheme optimisation

Weekly, not daily

Fewer visits and better adherence than daily injection regimens.

Access & cost

Peptide economics

Chemical synthesis of a <30 aa peptide vs a 22 kDa biologic: lower cost of goods, simpler logistics.

Safety positioning

Designed selectivity

Engineered to avoid the diabetogenic and IGF-1 concerns that limit rhGH use.

The team

Scientists, industry leaders and transfer experts

A combined bench-to-bedside skill set: discovery science, international pharma management, and intellectual-property translation.

MH

Mauricio Hernández

Principal Investigator

Architect of the peptide discovery platform, proteomic validation and the biased somatotropin receptor mechanism.

FR

Felipe Reyes

Pharmaceutical Industry Executive

International management across drug development, commercial strategy and regulatory pathways.

CP

Cristian Placencia

Pharmaceutical Industry Expert

Global leadership in pharma operations, market access and product lifecycle management.

PP

Patricio Pizarro

Tech Transfer & IP Strategy

Technology transfer, patent prosecution and academic–industry partnership structures.

JB

Jorge Becar

Legal & IP Counsel

Legal strategy and intellectual-property protection for the Splinter® peptide platform.

Path to the clinic

12-month plan and IP status

Q1

Synthesis

Zebrafish toxicology and growth trials.

Q2

In vivo

Mouse models for obesity and MASH.

Q3

Optimisation

PEGylation and distribution studies.

Q4

Translation

National phase filing and pharma partnering.

Patent PCT/CL2026/050023

Somatotropin Agonist Mimetic Peptides: Compositions and Methods for Tissue Regeneration, Metabolic Modulation and Cytoprotection

Claims cover synthetic sequences SEQ ID NO:1–29, somatotropin receptor binding and biased agonism, pharmaceutical compositions and clinical applications. Status: PCT filed · national phase jurisdictions being defined with IP counsel.

Where partners come in

  • Prioritise the first clinical indication
  • Define endpoints and patient profile for Phase 1/2
  • Stress-test the safety narrative vs rhGH

Get involved

An invitation to shape a first-in-class molecule.

Clinical relevance

Define the trial that matters

Help set the indication and endpoints that change outcomes for patients.

Scientific standing

Lead a novel mechanism

Co-author, present and champion genuinely new biology.

Early access

Shape the protocols

Engage before Phase 1 design is locked.

hello@splinterbiotech.com