8-Hydroxy-2-Deoxyguanosine ,Total Antioxidant Capacity in Oral Premalignant and Malignant Lesions
Study Details
Study Description
Brief Summary
Objectives: Investigating the level of salivary 8-hydroxy-2-deoxyguanosine (8-OHdG) and total antioxidant capacity (TAC) in oral premalignant and malignant lesions in order to determine their diagnostic value for the malignant patients. Design: 120 subjects diagnosed with oral leukoplakia, oral lichen planus (OLP) and oral squamous cell carcinoma (OSCC) along with healthy control subjects were included. Salivary samples from all participants were collected. 8-OHdG was measured by ELISA technique and the TAC level was assessed by a photometric test system.
| Condition or Disease | Intervention/Treatment | Phase |
|---|---|---|
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Detailed Description
Detection of molecular markers in saliva is superior to their detection in serum and other body fluids due to the fact of being an easy non-invasive tool requiring no training for its collection. Consequently, the aim of our work was to investigate salivary 8-OHdG and TAC in premalignant and malignant patients compared to normal subjects and to determine their diagnostic value for the malignant patients.
Methodology:
Study population:
A total of 120 subjects were enrolled in the present study. The clinically tested and confirmed subjects included Group A: 30 patients diagnosed with oral leukoplakia Group B: 30 patients suffering from oral lichen planus Group C: 30 patients having oral squamous cell carcinoma with the tongue being the most commonly affected site Group D: 30 age and gender matched individuals having no oral mucosal lesions acting as a control group.
Comprehensive oral diagnosis was done for all participating individuals. Biopsy specimens were obtained from various lesions where a surgical double wedge incisional biopsy was carried out to a depth of about 2mm. Specimens were sent for histopathological examination to confirm the clinical diagnosis.
Salivary sample collection: Collection of whole unstimulated saliva from all participants was performed using standard techniques.Subjects refrained from eating, drinking, chewing gum etc., for at least ½ h before the evaluation.Samples were collected by asking individuals to swallow first, tilt their head forward and expectorate all saliva in a tube for 5 minutes without swallowing. After collection, all samples were immediately stored at -20ºC until assayed.
Detection of salivary 8-OHdG: Saliva was centrifuged for 5 minutes at 5000 x g. The supernatant was removed for determination of 8- hydroxy-2'-deoxyguanosine using an ELISA kit provided by BioVision, USA (Catalog # K4160-100). 8-hydroxy-2'-deoxyguanosine is an oxidized derivative of deoxyguanosine and is one of the major products of DNA oxidation.
Determination of salivary total antioxidative status/capacity (TAS/TAC) was done using ImAnOx (TAS/TAC) Kit provided by Immun Diagnostik, Germany. It is a photometric test system used for the determination of the total antioxidative status/capacity in EDTA-plasma, serum and other biological samples.
The determination of the antioxidative capacity was performed by the reaction of antioxidants in the sample with a defined amount of exogenously provided hydrogen peroxide (H2O2). The antioxidants in the sample eliminate a certain amount of the provided H2O2. The residual H2O2 was determined photometrically by an enzymatic reaction which involves the conversion of TMB to a colored product. After addition of a stop solution, the samples were measured at 450 nm in a microtiter plate reader. The quantification was performed by the delivered calibrator. The difference between applied and measured peroxide concentration in a defined time period is proportional to the reactivity of the antioxidants of the sample (antioxidative capacity). Quantification was performed with the enclosed calibrator.
Study Design
Arms and Interventions
| Arm | Intervention/Treatment |
|---|---|
| Group A 30 patients diagnosed with oral leukoplakia |
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| Group B 30 patients diagnosed with oral lichen planus |
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| Group C 30 patients having oral squamous cell carcinoma with the tongue being the most commonly affected site |
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| Group D 30 age and gender matched individuals having no oral mucosal lesions acting as a control group |
Outcome Measures
Primary Outcome Measures
- Salivary 8-OHdG [1 year]
8-OHdG have a critical role in the pathogenesis of malignant lesions
- salivary TAC [1 year]
OSCC might be used as a tool to help diagnosis of OSCC but not to differentiate between various malignant grades
Eligibility Criteria
Criteria
Inclusion Criteria:
All included individuals were not under any current medication, suffering from any systemic condition or having any other oral mucosal disorder.
Exclusion Criteria:
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Pregnant or lactating females
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subjects having systemic disorder or taking medications;
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subjects who suffer from any other mucosal lesions.
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severe periodontal inflammation
Contacts and Locations
Locations
| Site | City | State | Country | Postal Code | |
|---|---|---|---|---|---|
| 1 | Sandy hassan shaaban | Cairo | Egypt |
Sponsors and Collaborators
- Fayoum University
Investigators
None specified.Study Documents (Full-Text)
More Information
Publications
None provided.- 1234