Light and scanning electron microscopic studies on subcommissural organ of the pig

P KUMAR; PAWAN KUMAR

doi:10.56093/ijans.v82i10.24294

Authors

P KUMAR Lala Lajpat Rai University of Veterinary and Animal Sciences, Hisar, Haryana 125 004 India
PAWAN KUMAR Lala Lajpat Rai University of Veterinary and Animal Sciences, Hisar, Haryana 125 004 India

https://doi.org/10.56093/ijans.v82i10.24294

Keywords:

Ependyma, Hypendyma, Pig, Subcommissural organ

Abstract

The subcommissural organ (SCO) of pig located on the ventral aspect of posterior commissure was constituted by an ependyma and a hypendyma. The pseudostratified columnar ciliated ependyma of SCO comprised 8–11 rows of round, oval to elongated type-I and type-II nuclei. Less basophilic type-I and darkly stained type-II nuclei were categorised on the basis of distribution of nuclear chromatin and staining affinity. The hypendyma contained hypendymal cells, micro- and macro-glial cells, blood capillaries and nerve fibres. The neurosecretory substance in the form of small, pink structures was mainly localised towards the supranuclear portion of the ependyma, free ventricular surface and lumen of blood capillaries. Scanning electron microscopy revealed ciliated and non-ciliated apical spherical protrusions along with tufts of cilia. A few apical spherical protrusions possessed small microvilli like structure.

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Author Biographies

P KUMAR, Lala Lajpat Rai University of Veterinary and Animal Sciences, Hisar, Haryana 125 004 India
PAWAN KUMAR, Lala Lajpat Rai University of Veterinary and Animal Sciences, Hisar, Haryana 125 004 India

References

Barlow R M, D’Agostino A N and Cancilla P A. 1967. A morphological and histochemical study of the subcommissural organ of young and old sheep. Zeitschrift fur Zellforschung and mikroskopische Anatomie 77: 299–315.

Castaneyra-Martin M, Carmona-Calero E M, Perez-Gonzalez H, Martinez-Pena Y, Valenzuela I, Ormazabal-Ramos C, Perez- Garcia C G, Marrero-Gordillo N, Trujillano-Dorado A, Gonzalez-Marrero I and Castaneyra-Perdomo A. 2005. Postnatal development of the secretory activity of the goat subcommissural organ. A Reissner’s fibre and angiotensin II immunohistochemical study. Anatomia Histologia Embryologia 34: 247–51.

Dellmann H D and Fahmy M F A. 1966a. Light microscopic investigations of the subcommissural organ and the epiphysis cerebri of the dromedary (Camelus dromedarius). Journal of Veterinary Science UAR 3: 33–37.

Dellmann H D and Fahmy M F A. 1966b. The subcommissural organ and pineal gland of the Egyptian water buffalo (Bos bubalis). Journal of Veterinary Science UAR 3: 49–54.

Hoyo-Becerra C, Lopez-Avalos M D, Cifuentes M, Visser R, Fernandez-Llebrez P and Grondona J M. 2010. The subcommissural organ and the development of the posterior commissure in chick embryos. Cell Tissue Research 339: 383– 95.

Humason G L. 1979. Animal Tissue Techniques. 4th edn. W H Freeman and Co., San Francisco.

Isomaki A M, Kivalo E and Talanti S. 1965. Electron microscopic structure of the subcommissural organ in the calf (Bos taurus) with special reference to secretory phenomena. Annales Academiae Scientiarum Fennicae Series A V Medica 111: 1– 64.

Kumar P, Gupta A N, Jain R K, Singh G and Nagpal S K. 2006. Scanning electron microscopic studies on the subcommissural organ, Reissner’s fibre and pineal gland of the buffalo calves. Haryana Veterinarian 45: 19–22.

Kumar P and Kumar S. 2000. The ultrastructure of the subcommissural organ ependyma of the goat. Anatomia Histologia Embryologia 29: 307–11.

Kumar P, Kumar S and Singh Y. 1997. Microarchitecture of the subcommissural organ of goat. Indian Journal of Animal Sciences 67: 1036–39.

Kumar P, Nagpal S K, Kumar S and Gupta A N. 1999. Histomorphology of the subcommissural organ of camel. Journal of Camel Practice and Research 6: 311–16.

Kumar P and Timoney J F 2008. Histomorphology of the subcommissural organ in horse. Indian Journal of Animal Sciences 78: 1227–30.

Leonieni, J. 1968. A contribution to the morphochemistry of the subcommissural organ of young dogs. Folia Morphologica 27: 13–21.

Lindberg, L. A. and Talanti, S. 1975. The surface fine structure of the bovine subcommissural organ. Cell Tissue Research 163: 125–32.

Luna L G. 1968. Manual of Histologic Staining Methods of the Armed Forces Institute of Pathology. 3rd edn. McGraw Hill Book Co., New York.

Meiniel A. 2007. The secretory ependymal cells of the subcommissural organ: which role in hydrocephalus? International Journal of Biochemistry and Cell Biology 39: 463– 68.

Ramkrishna V and Saigal R P. 1986. Histomorphology of the subcommissural organ of buffalo (Bubalus bubalis). Acta Veterinaria Hungarica 34: 3–9.

Saggar D, Kumar P and Kumar S. 2002 a. Structural and histochemical study of the subcommissural organ in sheep. Indian Journal of Animal Sciences 72: 1064–67.

Saggar D, Kumar P and Kumar S. 2002 b. Scanning electron- microscopic study on subcommissural organ and pineal gland of the sheep (Ovis aries). Indian Journal of Animal Sciences 72: 220–22.

Talanti S. 1958. Studies on the subcommissural organ in some domestic animals with reference to secretory phenomena. Annales Medicinae Experimentalis Biological Fenniae 36: 1–97.

Talanti S and Kivalo E. 1960. Studies on the subcommissural organ of some ruminants. Anatomischer Anzeiger 108: 53–59.