WFRF:(Tjust Anton E.)
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Pax7-Positive Cells/Satellite Cells in Human Extraocular Muscles
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- Lindström, Mona (author)
- Umeå universitet,Institutionen för integrativ medicinsk biologi (IMB)
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- Tjust, Anton E. (author)
- Umeå universitet,Institutionen för integrativ medicinsk biologi (IMB),Oftalmiatrik
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- Domellöf, Fatima Pedrosa (author)
- Umeå universitet,Institutionen för integrativ medicinsk biologi (IMB),Oftalmiatrik
- (creator_code:org_t)
- Association for Research in Vision and Ophthalmology (ARVO), 2015
- 2015
- English.
- In: Investigative Ophthalmology and Visual Science. - : Association for Research in Vision and Ophthalmology (ARVO). - 0146-0404 .- 1552-5783. ; 56:10, s. 6132-6143
- Journal article (peer-reviewed)
Abstract
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- PURPOSE. We quantified and investigated the distribution of Pax7-positive cells/satellite cells (SCs) in the human extraocular muscles (EOMs). METHODS. An immunofluorescence multiple-marker method simultaneously combining two SC markers (Pax7, NCAM), detection of the basement membrane (laminin) and cell nuclei (4',6-diamidino-2-phenylindole [DAPI]), was used on the anterior, middle, and posterior portions of EOMs from five healthy donors. Pax7-positive cell and SC content, myonuclear content, myofiber cross-sectional area, and myonuclear domain were analyzed in single cross-sections. Between 3915 and 13,536 myofibers per muscle cross-section and myofibers from the entire EOM cross-section were analyzed for quantification of Pax7-positive cells per myofiber (Pax7/F).RESULTS. The number of Pax7/F in the human EOMs varies along the length of the muscle with twice as high Pax7/F in the anterior part of the EOMs, but within the range of what has been previously reported for normal adult limb muscles. Furthermore, there are Pax7-positive cells in positions other than the classical SC position and the myonuclear domain size of adult EOMs is noticeably smaller than that previously reported for other adult skeletal muscles.CONCLUSIONS. Previous data on differences in Pax7-positive cell/SC abundance between EOMs and limb muscles must be reconsidered and the characteristics of different Pax7-positive cell populations further investigated. Higher numbers of Pax7-positive cells in the anterior portion of the EOMs may have a bearing for strabismus surgery involving sectioning of the muscle fibers.
Subject headings
- MEDICIN OCH HÄLSOVETENSKAP -- Medicinska och farmaceutiska grundvetenskaper -- Mikrobiologi inom det medicinska området (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Basic Medicine -- Microbiology in the medical area (hsv//eng)
Keyword
- satellite cell
- myoprogenitor cell
- Pax7
Publication and Content Type
- ref (subject category)
- art (subject category)
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