Sigmoid has developed two proprietary technologies known as LEDDS® (liquid/emulsion drug delivery system) and SmPill® (single-multiple pill) adapted to enhance the safety, efficacy and convenience of orally administered pharmaceuticals. The systems are extremely versatile and can be used to formulate drugs independently of physico-chemical characteristics. For difficult-to-formulate molecules, particularly water-insoluble drugs, LEDDS® and SmPill® offer new solutions of particular interest.

Sigmoid is applying these principles to its own pipeline of products but also collaborates with partners either to improve their existing products or to expedite discovery stage compound development. For partners, this approach can rescue a good molecule from being rejected for poor absorption or inadequate pharmacokinetic profile or re-energize an established product’s life cycle by creating a higher performing, second generation formulation. LEDDS® and SmPill® also create the opportunity of developing oral formulations of drugs previously available only by injection.

LEDDS® and SmPill® enable the controlled release of drugs, including biopharmaceuticals, that are optimally formulated in liquid or emulsion form for oral delivery.
Liquid drug formulations
 
Other than as a drink, liquid drug formulations for oral administration have previously only been available in large capsules which release their contents immediately at a single site, often in the stomach or small intestine. Further processing, such as coating, of large capsules can be challenging. Moreover, the manufacturing process introduces a seam where the two halves of the capsule are fused and this can lead to variability in dissolution. LEDDS® incorporating Sigmoid's seamless mini-spheres
 
In LEDDS® and SmPill®, Sigmoid’s seamless mini-spheres reduce dissolution variability, facilitate further processing and maintain the advantages arising from a solubilized active principle.

LEDDS® and SmPill® Technology Overview

To develop a LEDDS® or SmPill®-enabled product, the active pharmaceutical ingredient is:

 Solubilised as an emulsion, microemulsion or suspension;
 Formulated into mini-spheres; and
 Variably coated either by conventional or novel coating technologies

The result is an encapsulated drug in “pre-solubilised” form which when administered orally provides for predetermined instant or sustained release of the active drug to specific locations and at specific rates along the gastrointestinal tract. In essence, pre-solubilization of the drug enhances the predictability of its kinetic profile while simultaneously enhancing permeability and drug stability.

Because the LEDDS®/SmPill® approach is modular, being comprised of easily-swallowed mini-spheres, it can be presented in a variety of dosage forms in a range of strengths. This makes the technology particularly relevant to formulating drugs for special populations especially children and the elderly where swallowing can be difficult.

Key Clinical benefits of LEDDS® and SmPill®

 Rapid onset of action (if desired)
 Delivery of liquid/emulsion drug to the optimal site of action (eg colon)
 Delivery of liquid/emulsion drug to maximise absorption
 Controlled/Sustained release of liquid/emulsion drugs
 Increased residence time in the small intestine or colon
 Protection of active ingredient from harsh gastric and intestinal environment
 Broad intestinal dispersion, limiting local irritation and increasing absorption
 
 
 Enhanced stability of active ingredient through protection from light and oxidation
 Paediatric and geriatric formulation development facilitated
 Patent extension to extend product life-cycles
 Development of single drug formulations for new applications (reprofiling)
 Development of drug combinations for new uses
 Developing novel drug combinations to reduce pill burden
 Inherent Taste masking capability
 Oral formulation of injectable drugs
 Ease of oral administration arising from mini-sphere format

Patent Portfolio

Sigmoid maintains a portfolio of patents and patent applications covering LEDDS® and SmPill® as well as new formulations using the technologies. Sigmoid acknowledges the importance of securing patent protection as a means of protecting its investment in research and development and also as a basis for life-cycle management strategies especially for molecules having lost their original patent cover.

Sigmoid can rapidly manufacture and test clinical lots in the company's in-house GMP facilities licensed by the Irish Medicines Board.
Sigmoid Pharma , The Invent Centre
Dublin City University, Dublin 9, Ireland