Age-Related Changes in Myosin Heavy Chain Composition in... | NCT00154453

Studies
Age-Related Changes in Myosin Heavy Chain Composition in Human Orbicularis Oculi Muscle

NCT00154453

Sponsor

National Taiwan University Hospital

Status

Completed

Last Update Posted

Sep 12, 2005Estimated

Enrollment

Phase

Phase 1

Conditions

Aging

Interventions

obtain surgical specimen for analysis

Countries

Not provided

Protocol Section

Identification Module Status Module Sponsor/Collaborators Module Oversight Module Description Module Conditions Module Design Module Arms/Interventions Module Outcomes Module Eligibility Module Contacts/Locations Module References Module IPD Sharing Statement Module

Results Section

Participant Flow Module Baseline Characteristics Module Outcome Measures Module Adverse Events Module More Info Module

Annotation Section

Annotation Module

Document Section

Large Document Module

Derived Section

Miscellaneous Info Module Condition Browse Module Intervention Browse Module

Protocol Section

Identification Module

NCT ID

Results Section

No data available

No data is available for this block.

Annotation Section

No data available

No data is available for this block.

Document Section

No data available

No data is available for this block.

Derived Section

Miscellaneous Info Module

Version Holder

Status Module

Record Verification Date

Oct 2003

Overall Recruitment Status or Expanded Access Status

Completed

Last Known Status

Not provided

Delayed Posting

Not provided

Why Stopped

Not provided

Expanded Access Info

Start Date

Jan 2004

Primary Completion Date

Not provided

Completion Date

Aug 2004

First Submitted Date

Sep 9, 2005

First Submission Date that Met QC Criteria

Sep 9, 2005

First Posted Date

Sep 12, 2005Estimated

Results Waived

Not provided

Results First Submitted Date

Not provided

Results First Submitted that Met QC Criteria

Not provided

Results First Posted Date

Not provided

Certification/Extension (aka Delayed Results) First Submitted Date

Not provided

Certification/Extension First Submitted that Passed QC Review

Not provided

Certification/Extension First Posted Date

Not provided

Last Update Submitted Date

Sep 9, 2005

Last Update Posted Date

Sep 12, 2005Estimated

Sponsor/Collaborators Module

Responsible Party, by Official Title

Not provided

Lead Sponsor

National Taiwan University HospitalOTHER

Collaborators

Not provided

Description Module

Brief Summary

Orbicularis oculi muscle is a key structure in the peri-orbital anatomy and is responsible for the major changes of aging in this area. Peri-orbital rejuvenation has been an issue of great interest in plastic surgery. We believe that understanding the age-related histomorphometric changes in orbicularis oculi muscle is important for improving the current rejuvenation techniques or developing the new ones. Nevertheless, a study focusing on this topic has never been performed before, simply because it is difficult and dangerous to perform needle biopsy on orbicularis oculi muscle.

Detailed Description

Hundreds of people came to our hospital requesting upper blepharoplasty every year. Taking advantage of the discarded soft tissue in the blepharoplasty surgery, samples of bilateral orbicularis oculi muscle can be easily obtained from patients of various ages. This study is designed to objectively evaluate the age-related changes in human orbicularis oculi muscle by analyzing the composition of isoforms of myosin heavy chain (MHC), which is the predominant protein in skeletal muscle. MHC isoforms exist in different types of muscle fibers, and determines the maximum contraction speed of the muscle fiber. Therefore, The composition of MHC isoforms represents the composition of different types of muscle fiber.

These muscle specimens are stored with liquid nitrogen right after surgery. In the lab, the specimens are sectioned to 40μm in thickness, and soaked in special buffer solution. After electrophoresis and staining, bands of different types of MHC can be visualized. The gel is scanned and processed with an image analysis system. The density of each band can be determined, and the ratio of the different types of MHC can be calculated.

By dividing the subjects who had their orbicularis oculi muscle sampled during upper blepharoplasty operation into age groups of 20, 30, 40, 50, 60 and 70 years, these MHC subtypes composition ratios can be compared among the different groups. Therefore, the age-related changes of the composition of different muscle types can be concluded.

Design Module

Study Type

Interventional

Number of References to an Expanded Access Study

Not provided

Expanded Access Types

Not provided

Patient Registry

Not provided

Target Follow-Up Duration

Not provided

Phases

Phase 1

Interventional Study Design

Allocation

Biospecimen

No data available

No data is available for this block.

Enrollment

Name	Type	Description	Arm Group Labels	Other Names
obtain surgical specimen for analysis	Procedure

Outcomes Module

Primary Outcomes

Measure	Description	Time Frame
Differentiation capability of preadipocyte

Secondary Outcomes

Measure	Description	Time Frame
Proliferation capability of preadipocyte

Other Outcomes

Not provided

Eligibility Module

Eligibility Criteria

Inclusion Criteria:

patients receiving blepharoplasty

Exclusion Criteria:

Accepts Healthy Volunteers

Yes

Sex

All

Sex/Gender Based

Not provided

Sex/Gender Description

Not provided

Minimum Age

20 Years

Maximum Age

80 Years

Standard Ages

AdultOlder Adult

Study Population

Not provided

Sampling Method

Not provided

Contacts/Locations Module

Central Contacts

Not provided

Overall Officials

Name	Affiliation	Role
Yueh-Bih Tang, M.D. Ph.D.	National Taiwan University Hospital	Principal Investigator

Locations

Not provided