Effect of Hericium Erinaceus on Clinical Patients With Hearing Impairment

Study Overview
=================
Brief Summary
-----------------
This study aims to investigate the effect of Hericium Erinaceus on clinical patients with hearing impairment and possible mechanisms. Subjects with hearing impairment will be enrolled and randomly divided into experimental or control group supplemented with Hericium Erinaceus (430 mg/kg/day) or placebo, respectively for eight months. Basic characteristics will be evaluated at baseline by questionnaire. The hearing, liver and kidney functions, and neurotrophic factors will be examined at baseline, 4th month and 8th month.

Detailed Description
-----------------
This study aims to investigate the effect of Hericium Erinaceus on clinical patients with hearing impairment and possible mechanisms. Subjects with hearing impairment will be enrolled. Inclusion criteria were 50 to 79 years old with symmetric sensorineural hearing loss, subjective sensorineural tinnitus, and all frequencies differed of ears less than 15 dB. Exclusion conditions were patients with abnormal liver and kidney function, normal hearing, severe and very severe hearing loss, no tinnitus or non-subjective sensorineural tinnitus, moderate or more cognitive impairment, patients unable to understand the details of this study or patients unable to co-examine, history of alcohol or drug abuse, history of high ambient noise exposure, bone tone air gap of pure tone hearing threshold greater than 10 dB, and audiogram 4 kHz air conduction threshold greater than 8 kHz, 20 dB airway threshold, hearing impairment before age 30, and inability to understand the details of this study. Participants will randomly divide into experimental or control group supplemented with Hericium Erinaceus (430 mg/kg/day) or placebo, respectively for eight months by a prospective, randomized, double-blind approach. Basic characteristics will be evaluated at baseline by questionnaire. The status of hearing, and CBC, GOT, GPT, BUN, Creatinine, NGF and BDNF expressions in blood will be examined at baseline, 4th month and 8th month.

Official Title
-----------------
Effect of Hericium Erinaceus on Clinical Patients With Hearing Impairment and Possible Mechanisms

Conditions
-----------------
Tinnitus

Intervention / Treatment
-----------------
* Dietary Supplement: Hericium honey bolus
* Dietary Supplement: Placebo honey bolus


Participation Criteria
=================
Eligibility Criteria
-----------------
Inclusion Criteria: Patients aged 50 to 79 years old with symmetric sensorineural hearing loss, subjective sensorineural tinnitus, and all frequencies differed of ears less than 15 dB. Exclusion Criteria: Patients with abnormal liver and kidney function, normal hearing, severe and very severe hearing loss, no tinnitus or non-subjective sensorineural tinnitus, moderate or more cognitive impairment , patients unable to understand the details of this study or patients unable to co-examine, history of alcohol or drug abuse, history of high ambient noise exposure, bone tone air gap of pure tone hearing threshold greater than 10 dB, and audiogram 4 kHz air conduction threshold greater than 8 kHz, 20 dB airway threshold, hearing impairment before age 30, and inability to understand the details of this study.

Ages Eligible for Study
-----------------
Minimum Age: 50 Years
Maximum Age: 79 Years

Sexes Eligible for Study
-----------------
All

Accepts Healthy Volunteers
-----------------
No

Study Plan
=================
How is the study designed?
-----------------

Design Details

Primary Purpose: Supportive Care
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Quadruple


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Hericium honey bolus<br>Dosage form: honey bolus Dosage : Hericium erinaceus mycelium 250mg/day Frequency: 8 bolus/ day Duration: 8 months | Dietary Supplement: Hericium honey bolus<br>* The subjects of the experimental group will be supplemented with Hericium Erinaceus honey bolus(430 mg/kg/day) for eight months.<br>|
| Placebo Comparator: Control group<br>Dosage form: Placebo honey bolus Dosage : maize starch Frequency: 8 bolus/ day Duration: 8 months | Dietary Supplement: Placebo honey bolus<br>* The subjects of the control group will be supplemented with Placebo honey bolus(8 bolus/ day) for 8 months.<br>|

What is the study measuring?
-----------------
Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| 1.Change of Tinnitus status evaluates by Tinnitus handicap inventory (THI) | The status of tinnitus will be evaluated by Tinnitus handicap inventory (THI). THI is divided into three categories, including the functional (12 questions), emotional (8 questions), and catastrophic (5 questions) subscore. A total of 25 questions are used. The answer will be divided into three levels (will, sometimes, will not), and be scored into 4, 2 and 0 point, respectively. The subscore of functional (12 questions), emotional (8 questions), and catastrophic (5 questions) are 48, 32, and 20, respectively. The highest total score is 100 points. The higher the score, the more the tinnitus is. The difference of score will be compared from the baseline with 4th and 8th month. | Baseline, 4th month and 8th month | 
| Change of Tinnitus severity evaluates by visual analog scale (VAS) | The severity of tinnitus will be scored with a visual analog scale (VAS) from point 0 to point 10 by subject. The difference of score will be compared from the baseline with 4th and 8th month. | Baseline, 4th month and 8th month | 
| Changes of hearing obstacle average measure by Pure Tone Audiometry(PTA) | Pure tone threshold of subjects will be measured by Pure Tone Audiometry (PTA) to evaluate the changes from baseline ageing hearing obstacle average (dB HL) with 4th and 8th month. | Baseline, 4th month and 8th month | 
| Changes of speech recognizing measure by Speech Audiometry. | The Speech Audiometry is used to evaluate the changes of baseline speech recognizing (dB HL) and speech speech recognition rate(%) with 4th and 8th month. | Baseline, 4th month and 8th month | 
| Changes of NGF and BDNF levels of blood investigate by enzyme-linked immunosorbent assay (ELISA) | The NGF and BDNF levels of blood will be analyzed by enzyme-linked immunosorbent assay (ELISA) to detect the presence of NGF and BDNF. The NGF and BDN levels will be quantitative by the optical density (OD) of the sample comparing to a standard curve, which is a serial dilution of a known-concentration solution of the target molecule. The difference of NGF and BDNF levels will be compared from the baseline with 4th and 8th month. | Baseline, 4th month and 8th month | 

 Terms related to the study
=================
Keywords Provided by Centre Hospitalier Valida
-----------------
Hericium erinaceus, Hearing