KR102363479B1 - Percutaneous absorption system comprising rotigotine - Google Patents

Abstract

Disclosed is a percutaneous absorption agent comprising rotigotine. The percutaneous absorption agent according to the present invention suppresses crystal formation of rotigotine as an active ingredient, has excellent skin permeability, and has excellent skin adhesion. In addition, it is confirmed that drug dissolution is equivalent to that of a commercial product using a silicone-based polymer adhesive.

Description

Percutaneous absorption system comprising rotigotine

The present invention relates to a transdermally absorbable preparation containing rotigotine. Specifically, the present invention relates to a drug-containing adhesive layer containing rotigotine or a pharmaceutically acceptable salt thereof and an adhesive as an active ingredient; It relates to a transdermally absorbable preparation comprising a support layer and a release layer.

Rotigotine is a dopamine agonist and is known to be effective in treating Parkinson's disease and restless legs syndrome.

Parkinson's disease (Parkinson's Disease) is a neurodegenerative disease in which movement disorders such as slow movement (bradykinesia), tremor (forward), and muscle stiffness are the main symptoms. It is known that the onset is mainly due to the incomplete production of dopamine in the substantia nigra, resulting in decreased stimulation of the motor neuron cortex.

Since Parkinson's disease patients are very inconvenient to move due to movement disorders, it is very difficult for Parkinson's disease patients to take drugs themselves. Therefore, there is a need to improve the convenience of taking the Parkinson's disease patients and to formulate the formulation in a form that can exhibit a lasting pharmacological effect.

Currently, a transdermally absorbable formulation with a trade name of Neupro is commercially available overseas, which uses a silicone-based polymer adhesive.

However, since silicone-based pressure-sensitive adhesives are more expensive than acrylic-based pressure-sensitive adhesives and have relatively poor physical properties such as tackiness, it is necessary to develop a product that uses acrylic, not silicone, as an adhesive for rotigotine-containing transdermally absorbed formulations. However, when an acryl-based adhesive is used, there is a problem in that rotigotine, an active ingredient, is precipitated as crystals.

In particular, in the initial development of the NewPro, a product containing an acrylic adhesive was also being developed, but there was a problem that the drug dissolution rate was too low, and eventually, a product using a silicone adhesive was commercialized.

Korean Patent Publication No. 10-0875532

An object of the present invention is to provide a transdermally absorbable preparation containing rotigotine using an acryl-based adhesive polymer.

The present invention relates to a transdermally absorbable preparation containing rotigotine. Specifically, the present invention relates to a drug-containing adhesive layer containing rotigotine or a pharmaceutically acceptable salt thereof and an acrylic polymer adhesive; support layer; And it relates to a transdermally absorbable formulation comprising a release layer.

In the present invention, the drug-containing adhesive layer preferably further comprises an oil and a polymer.

In the present invention, the oil may be at least one selected from the group consisting of medium-chain triglycerides and lipophilic surfactants. Preferably, the medium chain triglyceride may be capric triglyceride. The lipophilic surfactant is a surfactant having a hydrophile-lipophile balance (HLB) of 0 to 10, and may preferably be a sorbitan fatty acid ester (SPAN series). More preferably, the oil may be at least one selected from the group consisting of capric triglyceride and sorbitan fatty acid ester.

In addition, in the present invention, the polymer is poloxamer, ethyl acrylate methyl methacrylate copolymer (Eudragit NE series), ammonio methacrylate copolymer (Eudragit RL series), cellulose derivatives (eg For example, it may be at least one selected from the group consisting of hydroxypropyl cellulose) and polyethylene glycol. Preferably, the polymer may be at least one selected from the group consisting of poloxamer, low-substituted-hydroxypropyl cellulose and ethyl acrylate/methyl methacrylate copolymer.

In the present invention, the content of the oil and the polymer is not particularly limited, but is preferably about 0.1 to 20% by weight, more preferably 1 to 10% by weight, based on the total weight of the drug-containing adhesive layer after drying. exists as

In the present invention, the acrylic polymer adhesive is, for example, DURO-TAK 87-900A, DURO-TAK 87-9301, DURO-TAK 87-4098, DURO-TAK 387-2510, DURO-TAK 387-2287, DURO-TAK 87-4287, DURO-TAK 387-2516, DURO-TAK 87-2074, DURO-TAK 87-235A, DURO-TAK 387-2353, DURO-TAK 87-2852, DURO-TAK 387-2051, DURO-TAK 387 -2052, DURO-TAK 387-2054, DURO-TAK 87-2194, DURO-TAK 87-2196, DURO-TAK 87-6908, GELVA GMS 3083, GELVA GMS 3253, GELVA GMS 788, GELVA GMS 9073, etc. may be used, but is not limited thereto.

In the present invention, the drug-containing adhesive layer may further include an antioxidant.

The transdermally absorbable preparation according to the present invention suppresses crystal formation of rotigotine as an active ingredient, has excellent skin permeability, and has excellent skin adhesion. In addition, it was confirmed that drug dissolution was equivalent to that of a commercial product using a silicone-based polymer adhesive. In addition, there was no cold flow phenomenon in which the polymer adhesive remained on the adhered surface of the skin.

1 is a result of observing whether crystals are formed by photographing Examples 1 to 5, Comparative Examples, and Control drugs under an optical microscope.
2 shows the comparative dissolution test results of Examples 1 to 5 and Comparative Examples.
3 shows the results of testing whether a cold flow phenomenon occurs with respect to Examples 1 to 16. Referring to FIG.
4 is a graph showing the experimental results comparing the transdermal permeation amount of Examples 6 and 7 and the control drug.

Hereinafter, the present invention will be described in detail based on examples in order to help the understanding of the present invention. However, the following examples are merely illustrative of the content of the present invention, and the spirit or scope of the present invention is not limited by the following examples in any sense. The embodiments of the present invention are provided to more completely explain the present invention to those of ordinary skill in the art.

One. Example 1 to 5 and comparative example transdermal Preparation of Absorbent Formulations

Transdermal absorption formulations of Examples 1 to 5 and Comparative Examples including the drug-containing adhesive layer having the composition shown in Table 1 below were prepared:

division Example (wt%) comparative example
(weight%) One 2 3 4 5 rotigotine 8.8 8.8 8.8 11.3 8.8 8.8 Acrylic adhesive polymer 71.5 81.3 81.3 63.7 71.5 Silicone-based adhesive polymer
(BIO-PSA ^TM Q7-4301) 43.6 Silicone-based adhesive polymer
(BIO-PSA ^TM Q7-4201) 43.6 anti-crystallizer capric triglycerides 19.6 9.8 Sorbitan monooleic acid ester 9.8 polyethylene glycol 25.0 Polysorbate 80 19.6 polyvinylpyrrolidone 3.9 antioxidant Sodium metabisulfite 0.001 0.001 0.001 0.001 0.001 0.001 ascorbyl palmitate 0.02 0.02 0.02 0.03 0.02 0.02 DL Alpha Tocopherol 0.05 0.05 0.05 0.06 0.05 0.05 total 100 100 100 100 100 100 Drug-containing adhesive layer
appearance Early colorless
Transparency colorless
Transparency colorless
Transparency colorless
Transparency colorless
Transparency colorless
translucent 1 month later colorless
Transparency colorless
Transparency colorless
Transparency colorless
Transparency colorless
Transparency colorless
translucent physical properties ^* Good Good Good Good Good Good crystal generation X X X △ X ○ f2 value 54.1 64.6 57.6 32.5 34.5 -

*) The physical properties are the results of evaluation of (i) whether the drug-containing adhesive layer, release paper, and support layer are separated, (ii) release force when the paper and release paper are removed, and (iii) whether the drug leaks out of the support layer.

Specifically, an anti-crystallization agent was placed in a 50 mL light-shielding vial, and an appropriate amount of ethanol was added thereto and mixed. After adding rotigotine free base and acrylic adhesive polymer, the mixture was mixed in a mixer for 1 hour.

Then, to the mixture, ascorbyl palmitate and DL-alpha-tocopherol dissolved in ethanol and sodium metabisulfite dissolved in purified water were added, and 1 in a roll mixer The drug-containing adhesive layer composition was prepared by mixing for a period of time.

Thereafter, after leaving for 30 minutes to remove air bubbles, a silicone-treated polyester (PET) release film was placed on the coater, and the prepared drug-containing adhesive layer composition was coated. Then, after drying in an oven at 80 ° C. for 6 minutes, the support layer film was laminated on the drug-containing adhesive layer composition, compressed using a compression roller, and then using a patch cutter to prepare a transdermally absorbable formulation having an area of 10 cm ² .

Thereafter, transdermal absorption preparations of each of the Examples and Comparative Examples prepared above (here, in Comparative Example, polyvinylpyrrolidone is used as an anti-crystallization agent and a silicone-based adhesive polymer is used as an adhesive polymer) and roti that are currently commercially available For the gothine-containing transdermal absorption preparation (hereinafter referred to as 'control drug'), physical properties, properties, and crystal precipitation were tested in the following experimental examples, and a dissolution test and a cold flow test were performed. The observation and experimental results are shown in Table 1 above.

2. Example of 6 to 16 transdermal Preparation of Absorbent Formulations

The transdermal absorption formulations of Examples 6 to 16 including the drug-containing adhesive layer having the composition shown in Table 2 below were prepared:

division Example (wt%) 6 7 8 9 10 11 12 13 14 15 16 rotigotine 11.2 11 12.9 11.3 11.3 11.3 11.3 11.3 11.3 11.3 11.3 Acrylic adhesive polymer 79.3 69.4 74.2 76.2 76.2 76.2 76.2 76.2 76.2 76.2 76.2 oil capric triglycerides 7.5 9.8 8.6 6.3 6.3 6.3 Sorbitan monooleic acid ester 6.3 6.3 6.3 6.3 6.3 polymer Poloxamer 407 1.9 9.8 4.3 6.3 Eudragit RLPO 6.3 Low-substituted hydroxypropyl cellulose 6.3 6.3 Eudragit NE30D 6.3 6.3 polyethylene glycol 6.3 6.3 antioxidant Sodium metabisulfite 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 ascorbyl palmitate 0.02 0.02 0.03 0.03 0.03 0.03 0.03 0.03 0.03 0.03 0.03 DL Alpha Tocopherol 0.06 0.06 0.07 0.06 0.06 0.06 0.06 0.06 0.06 0.06 0.06 total 100 100 100 100 100 100 100 100 100 100 100 patch appearance Early colorless
Transparency colorless
Transparency colorless
Transparency colorless
Transparency colorless
Transparency colorless
Transparency colorless
Transparency colorless
Transparency colorless
Transparency colorless
Transparency colorless
Transparency 1 month later colorless
Transparency colorless
Transparency colorless
Transparency colorless
Transparency colorless
Transparency colorless
Transparency colorless
Transparency colorless
Transparency colorless
Transparency colorless
Transparency colorless
Transparency physical properties ^* Good Good Good Good Good Good Good Good Good Good Good crystal generation X X X X X X X X X X X f2 value 64.2 61.8 55.9 60.7 53.4 73.25 55.17 52.94 67.35 40.69 34.82 Cold flow X X X X O O X X X X X Transdermal dissolution rate (μg/cm ² ) 38.5 49.7 -

*) The physical properties are the results of evaluation of (i) whether the drug-containing adhesive layer, release paper, and support layer are separated, (ii) release force when the paper and release paper are removed, and (iii) whether the drug leaks out of the support layer.

Specifically, a polymer such as poloxamer, Eudragit, a cellulose derivative or polyethylene glycol was put into a 50 mL light blocking vial, and an appropriate amount of ethanol was added thereto and mixed. Here, capric triglyceride or sorbitan monooleate was added as an anti-crystallization agent. The mixture was stirred slowly at 60° C. to dissolve the polymer material.

After adding rotigotine free base and an acrylic adhesive, the mixture was mixed in a mixer for 1 hour.

Then, to the mixture, ascorbyl palmitate and DL-alpha-tocopherol dissolved in ethanol and sodium metabisulfite dissolved in purified water were added and mixed in a roll mixer for 1 hour to prepare a drug-containing adhesive layer composition.

Thereafter, after leaving for 30 minutes to remove air bubbles, a silicone-treated polyester (PET) release film was placed on the coater, and the prepared drug-containing adhesive layer composition was coated. Then, after drying in an oven at 80 ° C. for 6 minutes, the support layer film was laminated on the drug-containing adhesive layer composition, compressed using a compression roller, and then using a patch cutter to prepare a transdermally absorbable formulation having an area of 10 cm ² .

Thereafter, physical properties, properties, and crystal precipitation were tested in the following experimental examples for the transdermal absorption preparations and control drugs of each of the Examples and Comparative Examples prepared above, and a dissolution test and a cold flow test were performed. The observation and experimental results are shown in Table 2 above.

3. Experimental example 1: Observation of physical properties

For the percutaneous absorption formulations of Examples 1 to 16 and Comparative Examples, (i) whether the drug-containing adhesive layer, release paper, and support layer are separated, (ii) release force when the paper and release paper are removed, (iii) drug leakage out of the support layer It was observed whether or not, and the test results are described in Tables 1 and 2.

As a result of the test, no specific problems were found in all Examples and Comparative Examples.

4. Experimental example 2: Long-term stability test ( transdermal Evaluation of the presence of crystals in the absorbent formulation)

Each of the transdermal absorption formulations and control drugs of Examples 1 to 16 and Comparative Examples (the size of each sample is 10 cm ² ) was put in a Petri dish, and a temperature cycle test was performed under two conditions of 40° C., 75% RH and -20° C. .

Storage for 2 days at 40°C and 75% RH condition, followed by storage for 2 days at -20°C temperature condition is 1 cycle. ) was taken. The degree of crystal precipitation is shown in Table 1 by indicating the degree of crystal precipitation as X (no crystal precipitation), △ (fine crystal precipitation), and ○ (crystal precipitation), and a photograph taken with an optical microscope is shown in FIG. 2 (magnification × 40 and ×100).

As a result of the experiment, as shown in FIG. 2 , in the transdermally absorbable formulations of Examples 1 to 5, crystals did not or only fine crystals were precipitated in the drug-containing adhesive layer even under severe conditions. Crystal precipitation was clearly observed under the harsh conditions.

5. Experimental example 3: Comparative dissolution test (Dissolution)

6 sheets (10 cm 2 / 1 sheet) of each of Examples 1 to 16 and Comparative Examples of the transdermally absorbed formulation and control drug were taken, and Paddle over disk (Apparatus 5) of the transdermal formulation in the United States Pharmacopeia (USP) )), a comparative dissolution test was performed according to the method.

Specifically, attach the drug-containing adhesive layer to the center of the disc assembly of the eluator so that it faces upward, and prepare 900 mL of degassed phosphate buffer (Phosphate buffer solution, pH=4.5) as the eluent while maintaining the temperature at 32±0.5°C. transferred to a vessel. The distance between the inner bottom of the eluate container and the disk was fixed to be 25±2 mm, and the sample solution was collected every predetermined time under the condition of a paddle rotation speed of 50 rpm. The sample solution collection time is 0.25, 0.5, 0.75, 1, 1.5, 2, 3, 4, 5, and 6 hours. After taking 3 ml of the sample solution, the same amount of the eluate as the sample solution was added to the container.

The dissolution amount of rotigotine at each sampling time was measured by high-performance liquid chromatography (HPLC), and the dissolution rate compared to the control drug was compared.

HPLC Analysis conditions

Column: Waters Xbridge C18 (150mm x 4.6, 5um)

Mobile phase:

Solution A: Acetonitrile

Solution B: 0.79g ammonium hydrogen carbonate in 1L of water. Adjust pH 9.5 with ammonia solution and filter it through a 0.22um nylon filter

Flow rate: 1.8 mL/min

Column temperature: 40℃

Injection volume: 100 μl

Detection: PDA/UV (analysis wavelength 220nm)

As a result of the comparative dissolution test, as shown in FIG. 2 and Table 1, Examples 4 and 5 did not satisfy the dissolution criterion (f2 value 50 or more) when compared with Comparative Examples.

In addition, the transdermal absorption formulations of Examples 15 and 16 showed that the f2 value was not suitable for the dissolution rate standard when compared to the reference drug.

Here, f2 is a similarity factor used in the comparative dissolution test, and is defined as in Equation 1 below:

[Equation 1]

In the above formula,

n is the number of time points for measuring the dissolution rate,

R _t is the dissolution rate (%) of the control sample observed at time t,

T _t is the dissolution rate (%) of the test sample observed at time t.

The similarity factor f2 may have a value between 0 and 100, and approaches 100 as the dissolution difference is small. If f2 shows a value of 50 or more, the two dissolution patterns are evaluated to be similar.

6. Experimental example 4: Cold flow ( Cold flow) test

Each of Examples 1 to 16 and the control drug were cut into 10 cm 2 , attached to a phenolic resin plate, and stored in an oven at 32 to 37.5° C. for 24 hours. After the adhered transdermally absorbed formulation was removed from the phenolic resin plate, the presence or absence of residues on the phenolic resin plate and the degree of adhesion were visually observed and photographed with a camera. The presence of residues or adherends was indicated by ○, and the absence of residues or adherends was indicated by X.

As a result, the transdermal absorption formulations of Examples 1 to 3 have a problem in that the adhesive remains (cold flow) as shown in FIG. 3 .

On the other hand, cold flow was observed in Examples 10 and 11 among the transdermal absorption formulations of Examples 6 to 16 further containing a polymer material.

7. Experimental example 5: In vitro skin permeability test

The in vitro skin permeability of the transdermally absorbed formulations of Examples 6 and 7 and the reference drug among Examples satisfying the criteria for the f2 value was evaluated using a Franz cell (vertical diffusion cell).

As an eluent, 6% polyethylene glycol oleyl ether solution was put in a receptor, and the internal temperature of the Franz cell was maintained at 32 ± 0.5 °C similar to the skin temperature. Residual gas in the solution was removed by constant stirring at a magnetic stirrer speed of 600 rpm. After the transdermal absorption formulation was cut to fit the area of the upper donor cell of the Franz cell, it was fixed on human cadaver skin, and the sample solution diffused into the receptor through the skin was collected every hour. The sample solution collection time is 0.5, 1, 1.5, 2, 2.5, 3, 4, 5, 6, 9, 12, 18, 24 hours, and the collected sample solution is analyzed through high performance liquid chromatography (HPLC) under the following analysis conditions. did

Analysis conditions

Column: Waters Xbridge C18 (150mm x 4.6, 5um)

Mobile phase:

Solution A: Acetonitrile

Solution B: 0.79g ammonium hydrogen carbonate in 1L of water. Adjust pH 9.5 with ammonia solution and filter it through a 0.22um nylon filter

Flow rate: 1.8 mL/min

Column temperature: 40℃

Injection volume: 100 μl

Detection: PDA/UV (analysis wavelength 220nm)

As a result of the experiment, as shown in FIG. 4 , Example 6 showed a similar transdermal absorption rate to the control drug, and Example 7 showed a higher transdermal absorption rate than the control drug.

The transdermally absorbable preparation according to the present invention has excellent skin permeability of rotigotine, an active ingredient.

Claims (8)

delete delete a drug-containing adhesive layer containing rotigotine or a pharmaceutically acceptable salt thereof, an acrylic polymer adhesive, oil, and a polymer; support layer; And a percutaneous absorption preparation comprising a release layer,
The oil is at least one selected from the group consisting of medium chain triglycerides and sorbitan fatty acid esters,
The polymer is at least one selected from the group consisting of poloxamer and ethyl acrylate/methyl methacrylate copolymer. The transdermally absorbed formulation according to claim 3, wherein the medium-chain triglyceride is capric triglyceride. delete delete delete The percutaneous absorption formulation of claim 3 or 4, wherein the drug-containing adhesive layer further comprises an antioxidant.

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