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Aquaporin-3 in keratinocytes and skin: Its role and interaction with phospholipase D2
Open accessAbstract
Aquaporin 3 (AQP3) is an aquaglyceroporin that transports water and glycerol and is expressed in the epidermis, among other epithelial tissues. We have recently shown that there is an association between this glycerol channel and phospholipase D2 (PLD2) in caveolin-rich membrane microdomains. While PLD2 is able to hydrolyze membrane phospholipids to generate phosphatidic acid, this enzyme also catalyzes, in the presence of primary alcohols, a transphosphatidylation reaction to produce a phosphatidylalcohol. We have proposed that AQP3 associated with PLD2 provides the physiological primary alcohol glycerol to PLD2 for use in the transphosphatidylation reaction to generate phosphatidylglycerol (PG). Further, we have proposed that PG functions as a signaling molecule to mediate early epidermal keratinocyte differentiation, and manipulation of this signaling module inhibits keratinocyte proliferation and enhances differentiation. In contrast, other investigators have suggested a proliferative role for AQP3 in keratinocytes. In addition, AQP3 knockout mice exhibit an epidermal phenotype, characterized by dry skin, decreased elasticity and delayed barrier repair and wound healing, which can be corrected by glycerol but not other humectants. AQP3 levels have also been found to be altered in human skin diseases. In this article the evidence supporting a role for AQP3 in the epidermis will be discussed.
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Aquaporin 3 regulates water transport across the lipid bilayer in keratinocytes and fibroblasts and therefore improves skin health.
“Aquaporin 3 regulates water transport across the lipid bilayer in keratinocytes and fibroblasts and therefore improves skin health [136]”
From The Roles of Vitamin C in Skin Health. (2017) · cites this paper as [136]
The Possible mechanisms section says AQP3 transports water and glycerol in the epidermis and is important to keratinocyte biology and skin function. The paper does not establish this role in fibroblasts. Evidence in vivo also suggests that glycerol transport, rather than water transport alone, accounts for the skin abnormalities observed in AQP3-deficient mice; the claimed water-transport explanation for improved skin health is therefore too specific. (LLM, conf=0.88)
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Cited by
Sorted by citations
The Roles of Vitamin C in Skin Health.
Pullar, J., Carr, A., & Vissers, M. (2017) · Nutrients · doi:10.3390/nu9080866 · Cited by 756
“Aquaporin 3 regulates water transport across the lipid bilayer in keratinocytes and fibroblasts and therefore improves skin health [136]; cyclophilin A and the transmembrane glycoprotein CD147 negatively impact on skin DNA repair mechanisms and affect the inflammatory response, therefore negatively impacting skin heal…”
Background
Metadata
- Authors
- Qin, H., Zheng, X., Zhong, X., Shetty, A. K., Elias, P. M., & Bollag, W. B.
- Affiliations
- San Francisco VA Medical Center (US)
- Charlie Norwood VA Medical Center (US)
- Corresponding author
- Bollag, Wendy B.
- Venue
- Archives of Biochemistry and Biophysics
- Publisher
- Elsevier BV
- Published
- 2011-04
- Volume
- 508
- Issue
- 2
- Pages
- 138-143
- ISSN
- 0003-9861 (ISSN-L)
- PMC
- PMC3061340
- OpenAlex
- W1978440987
- Cited by
- 100
- References
- 0
- Citations by year
- 2026: 6 · 2025: 5 · 2024: 10 · 2023: 10 · 2022: 10 · 2021: 6 · 2020: 12 · 2019: 2 · 2018: 9 · 2017: 11 · 2016: 3 · 2015: 3 · 2014: 3 · 2013: 2 · 2012: 5
- FWCI
- 0.38
- Type
- journal article
- Language
- en
- Open access
- green
- www.ncbi.nlm.nih.gov
- Locations
- Archives of Biochemistry and Biophysics (publishedVersion)
- PubMed (publishedVersion)
- Europe PMC (PubMed Central) (acceptedVersion)
- PubMed Central (acceptedVersion)
- Funders
- National Institutes of Health
- National Institute of Arthritis and Musculoskeletal and Skin Diseases (R01AR045212, AR-45212)
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Ion Transport and Channel Regulation
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Caveolin-1 and cellular processes
- Life Sciences › Pharmacology, Toxicology and Pharmaceutics › Pharmaceutical Science › Advancements in Transdermal Drug Delivery
- Keywords
- AQP3, phospholipase D2, keratinocytes, epidermis, glycerol transport, transphosphatidylation, keratinocyte differentiation, keratinocyte proliferation, skin barrier repair, wound healing, dry skin, humectants, glycerol channel
- MeSH terms
- Animals, Humans, Phospholipase D, Protein Binding, Skin, Skin Diseases, Keratinocytes, Aquaporin 3
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