DNA Repair Activity in the Skin of Day and Night Shift Workers

• Sponsor: Wright State University (Other)
• Overall Status: Not yet recruiting
• CT.gov ID: NCT04122456
• Collaborator: (none)
• Enrollment: 48
• Location: 1
• Arms: 2

Study Details

Study Description

Brief Summary

The purpose of this study is to test how the skin of night shift workers responds to artificial sunlight (ultraviolet B radiation; UVB) at two different times of the day in comparison to normal day shift workers. After the skin biopsies are obtained, they will be brought to the laboratory to be exposed to UVB radiation and to measure UVB responses.

Condition or Disease	Intervention/Treatment	Phase
Skin Cancer	Radiation: Ultraviolet B Radiation; Other: No Ultraviolet B Radiation	N/A

Study Design

• Study Type: Interventional
• Anticipated Enrollment: 48 participants
• Allocation: Non-Randomized
• Intervention Model: Parallel Assignment
• Masking: None (Open Label)
• Primary Purpose: Diagnostic
• Official Title: Pilot Study on DNA Repair Activity in the Skin of Day and Night Shift Workers
• Anticipated Study Start Date: Dec 1, 2022
• Anticipated Primary Completion Date: Dec 1, 2022
• Anticipated Study Completion Date: Dec 1, 2022

Arms and Interventions

Arm	Intervention/Treatment
Experimental: Day Shift Work Schedule Day shift worker skin biopsies will be exposed to artificial sunlight (ultraviolet B radiation; UVB) at the laboratory.	Radiation: Ultraviolet B Radiation; One skin punch biopsy will be taken to the laboratory for exposure to ultraviolet B radiation. After 1-hour incubation, the biopsies will be bisected in half.; Other: No Ultraviolet B Radiation; One skin punch biopsy will be taken to the laboratory and will be kept as a non-irradiated control.
Experimental: Night Shift Work Schedule Night shift worker skin biopsies will be exposed to artificial sunlight (ultraviolet B radiation; UVB) at the laboratory.	Radiation: Ultraviolet B Radiation; One skin punch biopsy will be taken to the laboratory for exposure to ultraviolet B radiation. After 1-hour incubation, the biopsies will be bisected in half.; Other: No Ultraviolet B Radiation; One skin punch biopsy will be taken to the laboratory and will be kept as a non-irradiated control.

Outcome Measures

Primary Outcome Measures

1. Expression level of the DNA repair factor XPA at two times of the day in the skin of day and night shift workers. [After 1 hour incubation from ultraviolet B radiation exposure.]

   Reverse transcription quantitative PCR (RT-qPCR) and immunohistochemistry will be used to measure XPA expression at the mRNA and protein level, respectively, in skin samples obtained at 8 am and 4 pm.

2. Expression levels of core clock genes at two times of the day in the skin of day and night shift works. [After 1 hour incubation from ultraviolet B radiation exposure.]

   Reverse Transcription Quantitative PCR (RT-qPCR) is used to measure the core circadian clock gene expression at the mRNA level in the skin samples obtained at 8 AM and 4 PM.

3. Activity of the nucleotide excision repair (NER) system at two times of the day in day and night shift workers. [After 1 hour incubation from ultraviolet B radiation exposure.]

   A biochemical assay of nucleotide excision repair is used to measure NER in the skin samples obtained at 8 AM and 4 PM.

4. Activation of DNA damage kinase signaling pathways at two times of the day in the skin of day and night shift workers. [After 1 hour incubation from ultraviolet B radiation exposure.]

   Immunohistochemistry is used to measure DNA damage kinase signaling (phosphorylated Chk1 and p53) in the skin samples obtained at 8 AM and 4 PM.

Eligibility Criteria

Criteria

• Ages Eligible for Study: 18 Years to 40 Years
• Sexes Eligible for Study: All
• Accepts Healthy Volunteers: Yes

Inclusion Criteria:

• Male/Female

• Fair skin (Fitzpatrick types I and II)

• Age 18 to 40

• Able to comprehend procedures/risks

• Primarily work and are awake during normal daylight hours (6 am to 6 pm), or primarily work and are awake during night shifts hours (between the hours of 6 pm and 6 am) or may work a mixture of these shifts over the past 3 months. Rotating shifts will be categorized based on the majority of hours worked on average during the last 3 months. Able to fill out a 3-month calendar of work schedule.

Exclusion Criteria:

• Known photosensitivity

• Currently on photosensitizing medications

• Diabetes Mellitus

• On any hormonal agents (e.g., birth control pills)

• History of abnormal scarring

• History of skin infections

• History of skin cancers

• History of sleep disorders such as sleep apnea or insomnia

• Known allergy to lidocaine local anesthetic

• Pregnancy or nursing

• Other serious health issues

Contacts and Locations

Locations

	Site	City	State	Country	Postal Code
1	Wright State Physicians	Fairborn	Ohio	United States	45324

Sponsors and Collaborators

• Wright State University

Investigators

• Principal Investigator: Jeffrey B Travers, MD, PhD, Wright State University

Study Documents (Full-Text)

None provided.

More Information

Publications

None provided.

• Responsible Party: Wright State University
• ClinicalTrials.gov Identifier: NCT04122456
• Other Study ID Numbers: 06753
• First Posted: Oct 10, 2019
• Last Update Posted: Mar 28, 2022
• Last Verified: Mar 1, 2022

• Studies a U.S. FDA-regulated Drug Product: No
• Studies a U.S. FDA-regulated Device Product: Yes
• Product Manufactured in and Exported from the U.S.: Yes
• Additional relevant MeSH terms: Skin Neoplasms

Study Results

No Results Posted as of Mar 28, 2022