Transforming Growth Factor α Evokes Aromatase Expression in Gastric Parietal Cells during Rat Postnatal Development
Estrogen, well known as a female hormone, is synthesized primarily by ovarian aromatase. However, extra-glandular tissues also express aromatase and produce estrogen. It is noteworthy that aromatase in gastric parietal cells begins expression around 20 days after birth and continues secreting consid...
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| Format: | Article |
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MDPI AG
2024-02-01
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| Series: | International Journal of Molecular Sciences |
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| Online Access: | https://www.mdpi.com/1422-0067/25/4/2119 |
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| author | Hiroto Kobayashi Akira Naito Kyutaro Kawagishi |
| author_facet | Hiroto Kobayashi Akira Naito Kyutaro Kawagishi |
| author_sort | Hiroto Kobayashi |
| collection | DOAJ |
| description | Estrogen, well known as a female hormone, is synthesized primarily by ovarian aromatase. However, extra-glandular tissues also express aromatase and produce estrogen. It is noteworthy that aromatase in gastric parietal cells begins expression around 20 days after birth and continues secreting considerable amounts of estrogen into the portal vein throughout life, supplying it to the liver. Estrogen, which is secreted from the stomach, is speculated to play a monitoring role in blood triglyceride, and its importance is expected to increase. Nevertheless, the regulatory mechanisms of the aromatase expression remain unclear. This study investigated the influence of transforming growth factor α (TGFα) on gastric aromatase expression during postnatal development. The administration of TGFα (50 μg/kg BW) to male Wistar rats in the weaning period resulted in enhanced aromatase expression and increased phosphorylated ERK1+2 in the gastric mucosa. By contrast, administration of AG1478 (5 mg/kg BW), a protein tyrosine kinase inhibitor with high selectivity for the epidermal growth factor receptor and acting as an antagonist of TGFα, led to the suppression of aromatase expression. In fact, TGFα expression in the gastric fundic gland isthmus began around 20 days after birth in normal rats as did that of aromatase, which indicates that TGFα might induce the expression of aromatase in the parietal cells concomitantly. |
| first_indexed | 2024-03-07T22:29:52Z |
| format | Article |
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| institution | Directory Open Access Journal |
| issn | 1661-6596 1422-0067 |
| language | English |
| last_indexed | 2024-03-07T22:29:52Z |
| publishDate | 2024-02-01 |
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| spelling | doaj.art-96c31c71095b4062b6de31a59db594652024-02-23T15:19:51ZengMDPI AGInternational Journal of Molecular Sciences1661-65961422-00672024-02-01254211910.3390/ijms25042119Transforming Growth Factor α Evokes Aromatase Expression in Gastric Parietal Cells during Rat Postnatal DevelopmentHiroto Kobayashi0Akira Naito1Kyutaro Kawagishi2Department of Anatomy and Structural Science, Faculty of Medicine, Yamagata University, 2-2-2 Iida-Nishi, Yamagata 990-9585, JapanDepartment of Rehabilitation, Faculty of Medical Science and Welfare, Tohoku Bunka Gakuen University, Sendai 981-8551, JapanDepartment of Anatomy and Structural Science, Faculty of Medicine, Yamagata University, 2-2-2 Iida-Nishi, Yamagata 990-9585, JapanEstrogen, well known as a female hormone, is synthesized primarily by ovarian aromatase. However, extra-glandular tissues also express aromatase and produce estrogen. It is noteworthy that aromatase in gastric parietal cells begins expression around 20 days after birth and continues secreting considerable amounts of estrogen into the portal vein throughout life, supplying it to the liver. Estrogen, which is secreted from the stomach, is speculated to play a monitoring role in blood triglyceride, and its importance is expected to increase. Nevertheless, the regulatory mechanisms of the aromatase expression remain unclear. This study investigated the influence of transforming growth factor α (TGFα) on gastric aromatase expression during postnatal development. The administration of TGFα (50 μg/kg BW) to male Wistar rats in the weaning period resulted in enhanced aromatase expression and increased phosphorylated ERK1+2 in the gastric mucosa. By contrast, administration of AG1478 (5 mg/kg BW), a protein tyrosine kinase inhibitor with high selectivity for the epidermal growth factor receptor and acting as an antagonist of TGFα, led to the suppression of aromatase expression. In fact, TGFα expression in the gastric fundic gland isthmus began around 20 days after birth in normal rats as did that of aromatase, which indicates that TGFα might induce the expression of aromatase in the parietal cells concomitantly.https://www.mdpi.com/1422-0067/25/4/2119stomachextra-glandular steroidogenesisdifferentiationEGFRERK1+2MAPK |
| spellingShingle | Hiroto Kobayashi Akira Naito Kyutaro Kawagishi Transforming Growth Factor α Evokes Aromatase Expression in Gastric Parietal Cells during Rat Postnatal Development International Journal of Molecular Sciences stomach extra-glandular steroidogenesis differentiation EGFR ERK1+2 MAPK |
| title | Transforming Growth Factor α Evokes Aromatase Expression in Gastric Parietal Cells during Rat Postnatal Development |
| title_full | Transforming Growth Factor α Evokes Aromatase Expression in Gastric Parietal Cells during Rat Postnatal Development |
| title_fullStr | Transforming Growth Factor α Evokes Aromatase Expression in Gastric Parietal Cells during Rat Postnatal Development |
| title_full_unstemmed | Transforming Growth Factor α Evokes Aromatase Expression in Gastric Parietal Cells during Rat Postnatal Development |
| title_short | Transforming Growth Factor α Evokes Aromatase Expression in Gastric Parietal Cells during Rat Postnatal Development |
| title_sort | transforming growth factor α evokes aromatase expression in gastric parietal cells during rat postnatal development |
| topic | stomach extra-glandular steroidogenesis differentiation EGFR ERK1+2 MAPK |
| url | https://www.mdpi.com/1422-0067/25/4/2119 |
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