Erytech Pharma

Vanessa Bourgeaux

Yann Godfrin

Fabien Gay

Thomas Cortese

Jerome Bailly

Emmanuelle Dufour

Jérôme Bailly

The invention relates to a pharmaceutical composition containing a PLP-dependent enzyme and optionally its cofactor, pyridoxal phosphate (PLP), and/or a phosphate or non-phosphate precursor of PLP, its use as a drug, its production method and a therapeutic treatment method related to it. The pharmaceutical composition comprises erythrocytes and a pharmaceutically acceptable vehicle, the erythrocytes encapsulating the PLP-dependent enzyme. The PLP-dependent enzyme may be methioninase, tyrosine phenol-lyase, tyrosine aminotransferase or cystathionine beta-synthase.

Pharmaceutical composition comprising erythrocytes encapsulating a PLP-dependent enzyme and, a non-phosphate PLP precursor

The invention relates to a pharmaceutical kit containing a) an injectable suspension of erythrocytes encapsulating a pyridoxal phosphate (PLP)-dependent enzyme and b) a non-phosphate PLP precursor. The invention further relates to methods of producing component(s) of the kit and to therapeutic treatment methods related to the kit. The PLP-dependent enzyme may be a methioninase, a tyrosine phenol-lyase, a tyrosine aminotransferase or a cystathionine beta-synthase.

Pharmaceutical kit comprising erythrocytes encapsulating a PLP-dependent enzyme and, a non-phosphate PLP precursor

A method for obtaining a stabilized suspension of red blood cells encapsulating an active ingredient, from resealed RBCs incorporating the active ingredient, the method comprising the incubation of the resealed RBCs in an incubation solution at an osmolality of no less than 280 m Osmol/kg, for a time of 30 minutes or more, the incubation solution being a solution that does not contain an agent which is denaturating for the RBC membrane, the liquid medium is then removed from the incubated suspension and the RBCs obtained are placed in suspension in a solution allowing the injection of the suspension in a patient. The suspensions obtained are particularly characterized by an extracellular haemoglobin level maintained at 0.5 or lower, in particular 0.2 g/dl or lower and/or a hemolysis rate maintained at 2 or less, in particular 1% or less, at 72 h after placing in suspension in a preservation solution and at a temperature of between 2 and 8&#xb0; C.

Method for stabilising suspensions of red blood cells encapsulating an active ingredient

Method of treatment using a pharmaceutical composition comprising erythrocytes encapsulating a PLP-dependent enzyme and its cofactor

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Lyons, France

Vanessa Bourgeaux