Surface topography method for determining effects of a botulinum toxin upon a muscle and for comparing botulinum toxins
View Patent ↗Skin topographical methods for quantifying pharmacodynamic parameters of a paralytic effect of a Clostridial toxin, such as a botulinum toxin upon a muscle, such as a frontalis muscle. The methods are effective in determining the potency of a Clostridial toxin, and in comparing toxins. For example, wrinkle reduction effects caused by one or more neurotoxins may be monitored, and differences in effects correspond to differences of neurotoxins.
1. A method for comparing botulinum neurotoxin-containing compositions, comprising the steps of:
examining a first superficial body region and a second superficial body region of an individual, the first and second superficial body regions comprising at least a portion of a muscle, wherein the first superficial body region and the second superficial body region are examined while the muscle is at a maximum voluntary contraction;
administering a first botulinum neurotoxin-containing composition to the first region;
administering a second botulinum neurotoxin-containing composition to the second region;
and examining the first superficial body region after administration of the first composition while the muscle of the first superficial body region is at a maximum voluntary contraction to determine an effect of the first composition on the first superficial body region;
examining the second superficial body region after administration of the second composition while the muscle of the second superficial body region is at a maximum voluntary contraction to determine an effect of the second composition on the second superficial body region,
wherein a difference in the effects corresponds to a difference in the first composition and the second composition.
2. The method of claim 1 , wherein the botulinum neurotoxin of the first composition is different from the botulinum neurotoxin of the second composition.
3. The method of claim 1 , wherein the botulinum neurotoxin of the first composition is a botulinum neurotoxin selected from the group consisting of botulinum neurotoxin types A, B, C, D, E, F, and G, and wherein the botulinum neurotoxin of the second composition is a botulinum neurotoxin other than the botulinum neurotoxin of the first composition.
4. The method of claim 1 , wherein the botulinum neurotoxin of the first composition is a botulinum neurotoxin produced by a first strain of a Clostridial bacteria, and the botulinum neurotoxin of the second composition is a botulinum neurotoxin produced by a strain of Clostridial bacterial other than the first strain.
5. The method of claim 1 , wherein the botulinum neurotoxin of the first composition is botulinum neurotoxin type A, and the botulinum neurotoxin of the second composition is botulinum neurotoxin type B.
6. The method of claim 1 , wherein the botulinum neurotoxin of the first composition is a native botulinum neurotoxin obtained from Clostridial bacteria, and the botulinum neurotoxin of the second composition is a modified botulinum neurotoxin.
7. The method of claim 1 , wherein the first composition comprises a polysaccharide in an amount effective to stabilize the botulinum neurotoxin, and the second composition is substantially free of the polysaceharide.
8. The method of claim 1 , wherein the first composition comprises a recombinant albumin in an amount effective to stabilize the botulmum neurotoxin, and the second composition is substantially free of recombinant albumin.
9. The method of claim 1 , wherein the first composition comprises gelatin in an amount effective in stabilizing the botulinum neurotoxin., and the second composition is substantially free of gelatin.
10. The method of claim 1 , wherein the first composition comprises human serum albumin in an amount effective in stabilizing the botulinum neurotoxin, and the second composition comprises a stabilizer other than human serum albumin.
11. The method of claim 1 , wherein the examining steps comprise at least one of (i) evaluating skin topography of the first and second regions; (ii) evaluating a surface electromyograph recording of the first and second regions; and (iii) evaluating photographs of the first and second regions.
12. The method of claim 11 , wherein the examining steps comprise (i) evaluating skin topography of the first and second regions; (ii) evaluating a surface electromyograph recording of the first and second regions; and (iii) evaluating photographs of the first and second regions.
13. The method of claim 11 , wherein the step of evaluating skin topography comprises producing an impression of the skin topography of the first and second regions before administration of the first and second compositions, respectively, and producing an impression of the skin topography of the first and second regions after administration of the first and second compositions, respectively.
14. The method of claim 1 , wherein a difference in effects corresponds to a difference in the first composition and the second composition selected from one or more of the group consisting of botulinum neurotoxin potency, safety, duration of effectiveness, and antibody response.
15. The method of claim 1 , further comprising at least one step selected from the group consisting of: ultrasonically measuring muscle mass; measuring a urodynamic effect resulting from administration of the first and second compositions; measuring a gravimetric effect; and staining a tissue sample with starch and iodine.
16. The method of claim 1 wherein the first and second compositions differ from one another other than the number of units of toxin administered to said first and second regions.
17. The method of claim 1 , further comprising at least one step selected from the group consisting of: ultrasonically measuring muscle mass; measuring a gravimetric effect; and staining a tissue sample with starch and iodine.
18. The method of claim 1 , further comprising at least one step selected from the group consisting of: ultrasonically measuring muscle mass; and staining a tissue sample with starch and iodine.
19. The method of claim 1 , further comprising staining a tissue sample with starch and iodine.