Patent Publication Number: US-2007112042-A1

Title: Topical agent for application to the skin prior to luminous treatment

Description:
CROSS-REFERENCE TO RELATED APPLICATION  
      This application is a divisional application of us application serial no. 10/401,957, filed Mar. 31, 2003, the contents of which are incorporated herein by reference. 
    
    
     BACKGROUND OF THE INVENTION  
      1. Field of the Invention  
      The present invention relates to a topical agent for application to the skin prior to luminous treatment.  
      2. Description of the Prior Art  
      Luminous treatment of the skin have been shown to enhance dermal collagen production by way of example by laser treatment by a pulsed dye laser during non-ablative wrinkle treatment by targeting chromophores (haemoglobin) in the microvasculature of the dermis. A mechanism is triggered which ultimately results in an increased production of collagen at the irradiated site.  
     SUMMARY OF THE INVENTION  
      The invention provides a topical agent for application to the skin prior to luminous treatment in order to further enhance the dermal collagen production.  
      According to the present invention there is provided a topical agent in the form of a topical vasodilator for the application to the skin prior to luminous treatment, which topical vasodilator is in a suitable vehicle including an active substance consisting of nicotinic acid (Niacin) in the range of 0.5-10.0 % by weight.  
      Tests have been carried out for studying the dermal collagen production following topical application of Niacin prior to irradiation with a 585 nm pulsed dye laser. The effect of irradiation by the haemoglobin specific 585 nm pulsed dye laser is significantly increased by the application of topical Niacin at the proposed treatment site prior to treatment. This effect was supported with biochemical analysis which showed an increase in the PIIINP levels above that of irradiation alone. Therefore, a combination of light and topical preparations demonstrate improved efficiency for non-ablative skin rejuvenation. There were no adverse side-effects shown when irradiation was applied to study sites at sub-purpuric levels with fluences at 1.8 J/cm 2 .  
      The topical vasodilator according to an embodiment of the invention is a skin cream containing 0.5 % by weight of the active substance, Niacin.  
      The topical vasodilator according to another embodiment of the invention is a skin cream containing 2.5 % by weight of the active substance, Niacin.  
      The topical vasodilator according to a further embodiment of the invention is a skin cream containing 5.0 % by weight of the active substance, Niacin.  
      The topical vasodilator according to a still further embodiment of the invention is a skin cream containing 7.5% by weight of the active substance, Niacin.  
      The topical vasodilator according to a still further embodiment of the invention is a skin cream containing 10.0 % by weight of the active substance, Niacin.  
      In the following the invention is explained in more details by means of a number of detailed examples of skin creams containing the active substance Niacin: 
    
    
     EXAMPLE 1  
      A skin cream containing:  
                                                          Carpopol ETD 2020   84.50%   (thickening agent)           Niacin   0.50%   (nicotinic acid)           Lubragel DV   14.35%   (viscous agent)           Diazolodial Urea   0.25%           Methylparaben   0.25%           Cetyl-alcohol   0.15%                         The pH-value is adjusted between 4 and 6             
 
     EXAMPLE 2  
     
       
         
           
               
               
               
               
             
               
                   
                   
               
               
                   
                   
               
             
            
               
                   
                 Carpopol ETD 2020 
                 40.00% 
                 (thickening agent) 
               
               
                   
                 Niacin 
                 7.50% 
                 (nicotinic acid) 
               
               
                   
                 Lubragel DV 
                 50.00% 
                 (viscous agent) 
               
               
                   
                 Diazolodial Urea 
                 0.25% 
               
               
                   
                 Methylparaben 
                 0.25% 
               
               
                   
                 Cetyl-alcohol 
                 0.15% 
               
               
                   
                   
               
               
                   
                   The pH-value is adjusted between 4 and 6    
               
            
           
         
       
     
      As an alternative to the above-mentioned laser treatment by a 585 am pulsed dye laser it should be mentioned that the luminous treatment of the skin may be effected by irradiation treatment of the skin with a flashlight. However, in both cases the application of the topical vasodilator according to the present invention to the skin prior to the luminous treatment have shown to enhance dermal collagen production.  
      Finally it should be mentioned that the topical vasodilator according to the invention may be applied to the skin in the form of a solution, a lotion, a gel or a cream containing the active substance, Niacin.