Identification of Compound Isolated From Cock's Comb and Its Effect on Arsenical Palmar Keratosis

Study Overview
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Brief Summary
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Arsenicosis is a massive public health hazard in Bangladesh. Prolonged consumption of water containing high concentration arsenic leads to arsenicosis which is characterized by dermatological features i.e. diffuse melanosis , spotted melanosis and keratosis. Cock's comb is rich in hyaluronic acid, chondroitin sulfate A, B, C and heparin. Hyaluronic acid is a hydrophilic molecules and is a constituent of wound extracellular matrix and facilitate wound healing.This work is aimed to identify the component that is effective in palmar arsenical keratosis.

Detailed Description
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Groundwater contamination caused by inorganic arsenic is a massive public health hazard in Bangladesh. Prolonged consumption of water containing high concentration arsenic leads to chronic arsenic poisoning which is characterized by dermatological features i.e. diffuse melanosis followed by spotted melanosis hyperpigmentation and keratosis. Until now there is no internationally accepted treatment for arsenical keratosis. Some authors suggest long-term administration of vitamin and mineral and topical application of salicylic acid, propylene glycol and neem may be effective. Cock's comb extract contains hyaluronic acid, chondroitin sulfates A, B and C, heparin, hexosamine and water. Study with cock's comb extract in the treatment of arsenical keratosis was done in the Department of Pharmacology, Bangabandhu Sheikh Mujib Medical University and was found effective. Therefore, the purpose of this study will be identification of compound isolated from cock's comb and its effect on palmar arsenical keratosis. After obtaining Institutional review board clearance, on the basis of inclusion and exclusion criteria, 40 patients with moderate to severe palmar arsenical keratosis will be enrolled from arsenic affected area located at Kamalla Union of Muradnagar Upazilla, Comilla. The study will be open phase II clinical trial. After enrollment, patients will be informed about the purpose as well as harmful and beneficial effects of the study. Informed written consent, detail history, clinical examination, photographs of the palm and water and nail samples will be collected before starting recruitment to confirm arsenicosis. For identification of compound present in the cock's comb thin layer chromatography and nuclear magnetic resonance will be done. Cytotoxic effects of the cock's comb extract will be analyzed by using brine shrimp assay. Cream will be prepared from cock's comb extract and supplied to the patient at an interval of 2 weeks to apply on palmar keratotic nodule with clean fingertip by rubbing gently at night for 12 weeks. Adherence of the cream and side effects will be monitored routinely through phone and during visit at field level. Improvement will be assessed by measuring the palmar keratotic nodular size with the help of slide calipers. The mean score of the nodular size before and after treatment will be done. Statistical analysis will be conducted by paired t test. The result will be presented in tabulated forms and bar diagrams.

Official Title
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Identification of Compound Isolated From Cock's Comb and Its Effect on Arsenical Palmar Keratosis

Conditions
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Improvement of Keratotic Nodular Size

Intervention / Treatment
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* Drug: drug containing extract from cock's comb


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: drinking arsenic contaminated water (>50 microgram/litre) for more than 6 months patients with moderate to severe arsenical palmar keratosis patients voluntarily agreed to participate patient did not receive topical application of any drug for the last three months Exclusion Criteria: patient who received any treatment of arsenicosis within last three months patient with diagnosed skin disease, like-atopic dermatitis and psoriasis any diagnosed systemic diseases, inflammatory disease and infectious condition that affect the skin, for example- diabetes mellitus, SLE and hepatitis

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 60 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Intervention Model: Single Group Assignment
Interventional Model Description: a single group of patients with palmar arsenical keratosis are given the drug, under study
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: patients with palmar arsenical keratosis<br>patients are given an ointment containing extract from cock's comb twice daily for three months | Drug: drug containing extract from cock's comb<br>* a container containing 25 mg of ointment having extract from cock's comb as active ingredient two times daily for 3 months<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| changes in keratotic nodular size | palmar arsenical keratosis will be measured before and after applying interventions | three months |