Composition for preventing or treating hearing loss

a technology for hearing loss and compositions, applied in the direction of biocide, plant/algae/fungi/lichens, drug compositions, etc., can solve the problems of low effectiveness of hearing aids or cochlear implants, the majority of innate hearing loss is extremely severe in degree, and the inability to learn language, etc., to prevent or treat hearing loss, inhibit the shift of hearing threshold, and effectively inhibit the effect of hearing loss

Inactive Publication Date: 2013-12-19
UNIV IND COOP GRP OF KYUNG HEE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0017]The composition according to the present invention can effectively inhibit the shift of hearing threshold induced by noise and the likes thereby inhibiting hearing loss, in particular, acoustic trauma, temporary or permanent noise-induced hearing loss. Therefore, the composition according to the present invention is useful for preventing or treating hearing loss. In addition, it can be administered orally, thereby drug compliance of patients can be enhanced.

Problems solved by technology

Most cases of innate hearing loss are extremely severe in degree and impossible to learn language without separate training or education.
However, if the degree of hearing loss is severe, the effectiveness of assistant devices such as hearing aid or cochlear implant is low with huge difference from normal hearing ability, thereby lots of inconvenience in daily lives remains.
Among these, hearing loss caused by noise and aging is appreciably increasing recently.
Since most cases of senile hearing loss also correspond to sensorineural hearing loss, there is no available drug or treatment method for treating or ameliorating disease except prevention or management thereof.
Recent industrialization of society also contributes to rapid increase of the population suffered from hearing loss due to noise.
Not only noise-induced hearing loss related with jobs such as workers or soldiers working in noisy environment but also that related with culture and leisure activities are increasing.
According to the Korean Industrial Accidents Act, exposure to environmental noise of not less than 90 dB can cause damage to auditory sense.
Besides of environment noise compelled, there are many cases of teenagers' exposure to loud sound such as leisure activity using MP3.
Therefore, recent noise-induced hearing loss is seen in various age groups.
Noise-induced hearing loss due to MP3 utilization and the likes from young age can damage hearing so that conversation can be held only with the help of hearing aid in their 40's.
The degree of hearing loss gets more severe when accompanied with physical aging.
High degree of hearing loss will finally cause serious problems in communication.
That is, the young generation experiencing current noise-induced hearing loss will suffer more severe hearing loss in their elderly.

Method used

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  • Composition for preventing or treating hearing loss
  • Composition for preventing or treating hearing loss
  • Composition for preventing or treating hearing loss

Examples

Experimental program
Comparison scheme
Effect test

example 1

Preparation of Cuscuta japonica Choisy Extract

[0061]500 g of Cuscuta japonica Choisy was added to 10 L of 70% ethanol and extracted in extraction vessel at 80° C. Supernatant was collected by repeating said procedure 3 times, concentrated with vacuum concentrator (EYELA, N-N) at 45° C., and then lyophilized with ILSHIN lyophilizer at the temperature of no more than −40° C. for at least 12 hours to obtain 149.8 g of Cuscuta japonica Choisy extract.

example 2

Preparation of the Extract of Rehmannia glutinosa Libschitz var. purpurea MAKINO and Cuscuta japonica Choisy

[0062]500 g of the mixture comprising 25% of steamed Rehmannia glutinosa Libschitz var. purpurea MAKINO and 75% of Cuscuta japonica Choisy with regard to total volume was added to 10 L of 70% ethanol 10 l and extracted in extraction vessel at 80° C. Supernatant was collected by repeating said procedure 3 times, concentrated with vacuum concentrator (EYELA, N-N) at 45° C., and then lyophilized with ILSHIN lyophilizer at the temperature of no more than −40° C. for at least 12 hours to obtain 97.6 g of steamed extract of Rehmannia glutinosa Libschitz var. purpurea MAKINO and Cuscuta japonica Choisy.

example 3

Preparation of Rehmannia glutinosa Libschitz var. purpurea MAKINO and Cuscuta japonica Choisy Fraction

[0063]50 g of the extract of Rehmannia glutinosa Libschitz var. purpurea MAKINO and Cuscuta japonica Choisy obtained from above Example 2 was suspended into 1 L of distilled water and dissolved by adding 1 L of water-saturated butanol, and then only the fraction soluble in water-saturated butanol layer was separated from funnel to vacuum dry. This procedure was repeated 5 times to obtain 9.8 g of fraction.

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Abstract

Disclosed is a pharmaceutical composition for preventing or treating hearing loss, comprising Cuscuta japonica Choisy extract, or the extract of Rehmannia glutinosa Libschitz var. purpurea MAKINO and Cuscuta japonica Choisy. In addition, the present invention provides a food composition for preventing or ameliorating hearing loss, comprising Cuscuta japonica Choisy extract, or the extract of Rehmannia glutinosa Libschitz var. purpurea MAKINO and Cuscuta japonica Choisy. The composition inhibits hearing loss, in particular, acoustic trauma, temporary or permanent hearing loss by effectively inhibiting the threshold shift induced by noise and the likes, and thusit is effective in preventing or treating hearing loss. In addition, it can be administered orally, thereby drug compliance of patients can be enhanced.

Description

FIELD OF THE INVENTION[0001]The present invention relates to a composition for preventing or treating hearing loss, comprising Cuscuta japonica Choisy extract or the extract of Rehmannia glutinosa Libschitz var. purpurea MAKINO and Cuscuta japonica Choisy.BACKGROUND OF THE INVENTION[0002]Ear can be classified into external ear from auricle to external auditory canal, middle ear with ear drum and auditory ossicle, and internal ear with cochlear canal and auditory nerve. Since sound is acoustic energy, it can be transmitted from auricle through external auditory canal to vibrate ear drum. The vibration of ear drum is transmitted to auditory ossicle comprised of 3 small bones connected to ear drum via mechanical energy. Strapes, the distal bone of auditory ossicle is connected to cochlear canal thereby transmitting the energy to lymph in cochlear canal. Transmitted energy can induce wave in lymph by which hair cells inside of cochlear canal can be stimulated. The movement of hair cells...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A61K36/39A23L1/30A61K36/185
CPCA61K36/39A61K36/185A23L1/3002A61K36/804A61K36/43A23V2002/00A61K9/0019A61K9/08A61K9/145A61K9/2018A61K9/2059A23L33/105A61P27/16A23V2200/30A23V2250/21A61K2300/00A61K36/64
Inventor KANG, TONG HOHONG, BIN NA
Owner UNIV IND COOP GRP OF KYUNG HEE UNIV
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