REGULATORY ELEMENTS IN THE SKIN EPITHELIUM OF SACCOGLOSSUS MERESCHKOWSKII (ENTEROPNEUSTA, HEMICHORDATA): ELECTRON MICROSCOPIC AND IMMUNOCYTOCHEMICAL STUDY
- Authors: Stolyarova M.V.1, Valkovich E.I.1
-
Affiliations:
- St. Petersburg State Pediatric Medical University
- Issue: Vol 144, No 6 (2013)
- Pages: 026-031
- Section: Articles
- URL: https://j-morphology.com/1026-3543/article/view/398684
- DOI: https://doi.org/10.17816/morph.398684
- ID: 398684
Cite item
Abstract
The aim of this investigation was to demonstrate the regulatory elements in the skin epithelium of Enteropneusta which are supposed to be related to the chordate ancestors. Using electron microscopy, it was found that in the skin epithelium of a representative of enteropneusts Saccoglossus mereschkowskii, the basal parts of some epitheliocytes took part in formation of a nerve layer. These cells were considered as receptor ciliated cells. The granular epithelial cells were shown to release secretion according to both exocrine and endocrine mechanism; these cells were characterized as endocrine-like regulatory cells. Fine granular cells possibly represent special receptor-endocrine-like cell type. The immunocytochemical detection of FMRFamid neuropeptide localization in histological sections confirmed the electron microscopic data on the presence of receptor and endocrine-like cells in the epithelium. It is suggested that the skin epithelium of Enteropneusta contains a peculiar neuro-endocrine regulatory system that is represented by receptor cells, receptorendocrine-like cells of an open type and nerve elements of the nerve layer.
Full Text
About the authors
M. V. Stolyarova
St. Petersburg State Pediatric Medical University
Email: mvstolyarova@yandex.ru
E. I. Valkovich
St. Petersburg State Pediatric Medical University
References
- Атаманова М. В. Кожный и кишечный эпителии кишечнодышащих как этап филогенетического развития эпителиев хордовых. Арх. анат., 1977, т. 73, вып. 9, с. 55–61.
- Атаманова М. В. Ультраструктурные особенности кожного эпителия Saccoglossus mereschkowskii (Enteropneusta). Цитология, 1978, т. 20, № 12, с. 1355–1359.
- Бигдай Е. В., Самойлов В. О., Руденко Я. Н. и др. Две молекулярные системы подвижности обонятельных жгутиков лягушки. Биофизика, 2008, т. 53, вып. 6, с. 997–1000.
- Зайцева О. В. Нервные клетки в эпителии пищеварительного тракта брюхоногих моллюсков. Докл. РАН, 2006, т. 408, № 2, с. 280–282.
- Пунин М. Ю. Кишечная регуляторная система беспозвоночных животных и ее предполагаемая эволюция у многоклеточных. Труды Зоол. ин-та РАН (СПб.), 2001, т. 290.
- Столярова М. В. Сравнительная морфолого-физиологическая характеристика и реактивные особенности эпителиальных систем у животных разных уровней организации и человека: филогенетический аспект: Автореф. дис. … д-ра биол. наук. СПб., 2012.
- Benito J. and Pardos F. Hemichordata. In.: Microscopic Anatomy of Invertebrates. New-York, Wiley-Liss, 1997, v. 15, p. 15–101.
- Bromham L. D. and Degnan B. M. Hemichordates and deuterostome evolution: robust molecular phylogenetic support for a hemichordate+echinoderm clade. Evol. Dev., 1999, v. 1, № 3, p. 166–171.
- Bullock T. H. The anatomical organization of the nervous system of Enteropneusta. Quart. J. Micr. Sci., 1945, v. 86, p. 55–111.
- Cameron C. B., Garey J. R. and Swalla B. J. Evolution of the chordate body plan: new insights from phylogenetic analyses of deuterostome phyla. Proc. Natl. Acad. Sci. USA, 2000, v. 97, № 9, p. 4469–4474.
- Cameron C. B., Mackie G. O., Powell J. F. et al. Gonadortopinreleasing hormone in mullberry cells of Saccoglossus and Ptychodera (Hemichordata, Enteropneusta). Gen. Comp. Endocrinol., 1999, v. 114, № 1, p. 2–10.
- Haselton A. T., Yin C. and Stoffolano J. G. FMRFamide-like immunoreactivity in the central nervous system and alimentary tract of the non-hematophagous blow fly, Phormia regina, and the hematophagous horse fly, Tabanus nigrovittatus. J. Insect. Sci., 2008, v. 8, Art. 65, p. 1–17.
- Satir P. and Christensen S. T. Overview of structure and function of mammalian cilia. Annu. Rev. Physiol., 2007, v. 69, p. 377–400.
- Silén L. On the nervous system of Glossobalanus marginatus Meek (Enteropneusta). Acta Zool. (Stockh.), 1950, v. 31, p. 149– 175.
- Welsch U. Hemichordata. In: Biology of the Integument. v. 1. Invertebrates. Berlin, Springer, 1984, p. 790–799.