Cell-free plant cell culture suspension supernatant with re-youth activity and/or wound healing activity over skin cells
The invention relates to cell-free supernatants (conditioned media) that previously supported the growth of a dedifferentiated plant cell suspension culture, or a fraction of said cell-free supernatant, said cell-free supernatant or said fraction comprising peptides from 4 to 300 amino acids length and including peptide plant growth factors and peptide plant transcription factors, and without having cytoplasmic cell contents from the cell lysis and membranes and/or cell walls. The invention also relates to fractions of said supernatants and to cosmetic applications for promoting re-youth of skin.
1. A method for treating a skin wound in a human in need thereof comprising:
administering to the human in need thereof a therapeutically effective amount of a cell-free supernatant or a cell-free supernatant fraction, wherein said cell-free supernatant or a cell-free supernatant fraction thereof is obtained by a method comprising:
(i) growing dedifferentiated plant cells from a friable callus in a liquid nutrient culture medium for 5 days to 15 days, to obtain a conditioned media supporting the growth of the dedifferentiated plant cells; and
(ii) removing the entire plant cells from the conditioned media without applying a lysing step to the cells, to obtain the cell-free supernatant or the cell-free supernatant fraction comprising peptides from 4 amino acids to 300 amino acids in length, said peptides being selected from the group consisting of peptide plant growth factors, plant transcription factors, epigenetic factors, and mixtures thereof;
wherein the dedifferentiated plant cell culture suspension is from a plant selected from the group consisting of Daucus carota, Centella asiatica, Punica granatum, Gossypium herbaceum, Sarcocapnos crassifolia, Curcuma longa, Linum usitatissimum, Vitis vinifera, Lithops pseudotruncatella, Morinda citrifolia, Syvmphytum officinale, Cannabis sativa, Olea europaea , and Camellia sinensis.
2. The method of claim 1 , wherein said cell-free supernatant or said cell-free supernatant fraction comprises peptides from 5 amino acids to 300 amino acids in length, said peptides selected from the group consisting of peptide plant growth factors, plant transcription factors, and mixtures thereof.
3. The method of claim 1 , wherein the cell-free supernatant or the cell-free supernatant fraction thereof is obtained by a method comprising freeze-drying the cell-free supernatant or the cell-free supernatant of (ii) to obtain a freeze-dried supernatant or a freeze-dried cell-free supernatant fraction.
4. The method of claim 1 , wherein the cell-free supernatant or the cell-free supernatant fraction thereof is obtained by further concentrating from 100 times to 500 times the obtained freeze-dried cell-free supernatant or the freeze-dried cell-free supernatant.
5. The method of claim 1 , wherein the dedifferentiated plant cell suspension culture is cultured at a cell density, expressed as number of cells per volume unit of suspension culture, from 1×10 5 cell/ml of suspension culture to 1×10 7 cell/ml suspension culture.
6. The method of claim 1 , wherein for the fraction of the cell-free supernatant, the method further comprises carrying out a protein separation process by means of a separation technique selected from the group consisting of chromatography, filtration, ultrafiltration, protein precipitation, and combinations thereof.