8-Hydroxy-2-Deoxyguanosine ,Total Antioxidant Capacity in Oral Premalignant and Malignant Lesions

Detection of Salivary 8-Hydroxy-2-Deoxyguanosine and Total Antioxidant Capacity in Patients With Oral Premalignant and Malignant Lesions

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.

Study Overview

• Status: Completed
• Conditions: Premalignant Lesion

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 Type: Observational
• Enrollment (Actual): 120

Contacts and Locations

Study Locations

• Egypt
  • Cairo, Egypt
    • Sandy hassan shaaban

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 35 years to 63 years (ADULT)
• Accepts Healthy Volunteers: Yes
• Genders Eligible for Study: All

• Sampling Method: Probability Sample

Study Population

The included subjects were all assessed medically according to the modified Cornell Medical index (Kerr & Millard, 1965).

Description

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:

1. Pregnant or lactating females
2. subjects having systemic disorder or taking medications;
3. subjects who suffer from any other mucosal lesions.
4. severe periodontal inflammation

Study Plan

How is the study designed?

Number of groups / cohorts

4

Cohorts and Interventions

Group / Cohort
Group A; 30 patients diagnosed with oral leukoplakia
Group B; 30 patients diagnosed with 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

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Salivary 8-OHdG	8-OHdG have a critical role in the pathogenesis of malignant lesions	1 year
salivary TAC	OSCC might be used as a tool to help diagnosis of OSCC but not to differentiate between various malignant grades	1 year

Collaborators and Investigators

• Sponsor: Fayoum University

Study record dates

Study Major Dates

• Study Start (ACTUAL): April 1, 2018
• Primary Completion (ACTUAL): October 1, 2018
• Study Completion (ACTUAL): December 1, 2018

Study Registration Dates

• First Submitted: January 28, 2019
• First Submitted That Met QC Criteria: February 2, 2019
• First Posted (ACTUAL): February 5, 2019

Study Record Updates

• Last Update Posted (ACTUAL): February 20, 2019
• Last Update Submitted That Met QC Criteria: February 19, 2019
• Last Verified: February 1, 2019

More Information

Terms related to this study

• Keywords: Antioxidant; Squamous cell carcinoma; 8-hydroxy-2- deoxyguanosine
• Additional Relevant MeSH Terms: Neoplasms; Precancerous Conditions
• Other Study ID Numbers: 1234 (Department of Defense)

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: UNDECIDED

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No