Development of Methotrexate Complexes Endowed with New Biological Properties Envisioned for Musculoskeletal...

Area of Science:

• Materials Science
• Biochemistry
• Pharmacology

Background:

• Methotrexate (MTX) is a standard rheumatoid arthritis (RA) treatment, but it only prevents disease progression, necessitating regenerative therapies.
• Current RA treatments lack effective tissue repair mechanisms, highlighting the need for novel therapeutic strategies.

Purpose of the Study:

• To synthesize and characterize novel metal-methotrexate (MTX) complexes.
• To investigate the potential of these complexes as regenerative therapies for rheumatoid arthritis (RA).

Main Methods:

• Synthesis of M(MTX)·xH2O complexes (M = Sr, Zn, Mg).
• Physicochemical characterization using TGA, XRD, NMR, ATR-FTIR, and EDAX.
• Evaluation of bioactivity, including glycosaminoglycan (GAG) deposition and anti-inflammatory effects.
• Encapsulation of complexes into chitosan microparticles for potential in situ delivery.

Main Results:

• Successful synthesis and characterization of strontium, zinc, and magnesium MTX complexes.
• Confirmed coordination of cations to MTX via carboxylate groups.
• Demonstrated enhanced GAG deposition and alternative anti-inflammatory properties.
• Confirmed MTX immunosuppressive activity on macrophages was preserved.
• Successful loading of complexes into chitosan microparticles.

Conclusions:

• Metal complexation of MTX imparts new bioactive properties, including enhanced GAG deposition and anti-inflammatory effects.
• These novel MTX complexes maintain immunosuppressive functions while offering regenerative potential.
• Chitosan microparticle encapsulation demonstrates feasibility for in situ delivery, presenting a potential alternative to oral MTX therapy for RA.