KFU. Card publication. The neuro-glandular brain of the Pyramicocephalus phocarum plerocercoid (Cestoda, Diphyllobothriidea): immunocytochemical and ultrastructural study

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THE NEURO-GLANDULAR BRAIN OF THE PYRAMICOCEPHALUS PHOCARUM PLEROCERCOID (CESTODA, DIPHYLLOBOTHRIIDEA): IMMUNOCYTOCHEMICAL AND ULTRASTRUCTURAL STUDY

Form of presentation

Articles in international journals and collections

Year of publication

2022

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Authors, employees of KFU

Biserova Natalya Mikhaylovna, author

Other authors

Mustafina Alfiya Rodmirovna, author

Raykova Olga Igorevna, author

Bibliographic description in the original language

Biserova N. M., Mustafina A.R., Raikova O.I. 2022. The neuro-glandular brain of the Pyramicocephalus phocarum plerocercoid (Cestoda, Diphyllobothriidea): immunocytochemical and ultrastructural study. Zoology. V. 152 P. 1-60 [IF – 2.240] https://doi.org/10.1016/j.zool.2022.126012

Annotation

� novel type of a complex neuro-glandular brain structure including both nervous and glandular elements and associated with sensory ones is detected in Pyramicocephalus phocarum plerocercoid (Cestoda: Diphyllobothriidea), parasite of Gadus morua from the White Sea. The brain has two lateral lobes connected by a long cellular median commissure. The brain is tightly surrounded by glandular cells, which receive numerous synapses from the brain neurons. A complex of sensory organs associated with ducts and terminal pores of the frontal glands lies in the scolex tegument. Serotonin, FMRFamide- and GABA-like immunoreactive (IR) neurons are found in the brain, the main nerve cords, and the plexus of the plerocercoid. The innervation of the frontal gland ducts by FMRFamide-IR neurites is detected for the first time proving that they function under control of the nervous system and thus evidencing the eccrine nature of the secretion mechanism. Ultrastructural data show that light, dark and neurosecretory neurons are present in the brain lobes. The median commissure consists of loosely arranged thin parallel axons and several giant and small neurons. The commissure is stratified and penetrated by frontal glandular cells and their processes. Such neuro-glandular morpho-functional brain complex is suggested as a model for Diphyllobothriidae family. Five structural types of sensory organs are described in the scolex of P. phocarum; their colocalization with eccrine gland terminals is supposedly specific for Diphyllobothriidae family. Within the order Diphyllobothriidea, there are significant differences in the architecture of the plerocercoid brain at the family level. We suppose homology of giant commissural neurons among Diphyllobothriidea. Differences between diphyllobothriidean nervous system and that of other cestodes are discussed.

Keywords

tapeworms, glands, synapse, receptors, serotonin, GABA, FMRFamide

The name of the journal

Zoology

Please use this ID to quote from or refer to the card

https://repository.kpfu.ru/eng/?p_id=264753&p_lang=2

Resource files

File name	Size (MB)	Format
pagination_ZOOL_126012.pdf	6,37	pdf	show / download

Full metadata record

Field DC	Value	Language
dc.contributor.author	Biserova Natalya Mikhaylovna	ru_RU
dc.contributor.author	Mustafina Alfiya Rodmirovna	ru_RU
dc.contributor.author	Raykova Olga Igorevna	ru_RU
dc.date.accessioned	2022-01-01T00:00:00Z	ru_RU
dc.date.available	2022-01-01T00:00:00Z	ru_RU
dc.date.issued	2022	ru_RU
dc.identifier.citation	Biserova N. M., Mustafina A.R., Raikova O.I. 2022. The neuro-glandular brain of the Pyramicocephalus phocarum plerocercoid (Cestoda, Diphyllobothriidea): immunocytochemical and ultrastructural study. Zoology. V. 152 P. 1-60 [IF – 2.240] https://doi.org/10.1016/j.zool.2022.126012	ru_RU
dc.identifier.uri	https://repository.kpfu.ru/eng/?p_id=264753&p_lang=2	ru_RU
dc.description.abstract	Zoology	ru_RU
dc.description.abstract	� novel type of a complex neuro-glandular brain structure including both nervous and glandular elements and associated with sensory ones is detected in Pyramicocephalus phocarum plerocercoid (Cestoda: Diphyllobothriidea), parasite of Gadus morua from the White Sea. The brain has two lateral lobes connected by a long cellular median commissure. The brain is tightly surrounded by glandular cells, which receive numerous synapses from the brain neurons. A complex of sensory organs associated with ducts and terminal pores of the frontal glands lies in the scolex tegument. Serotonin, FMRFamide- and GABA-like immunoreactive (IR) neurons are found in the brain, the main nerve cords, and the plexus of the plerocercoid. The innervation of the frontal gland ducts by FMRFamide-IR neurites is detected for the first time proving that they function under control of the nervous system and thus evidencing the eccrine nature of the secretion mechanism. Ultrastructural data show that light, dark and neurosecretory neurons are present in the brain lobes. The median commissure consists of loosely arranged thin parallel axons and several giant and small neurons. The commissure is stratified and penetrated by frontal glandular cells and their processes. Such neuro-glandular morpho-functional brain complex is suggested as a model for Diphyllobothriidae family. Five structural types of sensory organs are described in the scolex of P. phocarum; their colocalization with eccrine gland terminals is supposedly specific for Diphyllobothriidae family. Within the order Diphyllobothriidea, there are significant differences in the architecture of the plerocercoid brain at the family level. We suppose homology of giant commissural neurons among Diphyllobothriidea. Differences between diphyllobothriidean nervous system and that of other cestodes are discussed.	ru_RU
dc.language.iso	ru	ru_RU
dc.subject	tapeworms	ru_RU
dc.subject	glands	ru_RU
dc.subject	synapse	ru_RU
dc.subject	receptors	ru_RU
dc.subject	serotonin	ru_RU
dc.subject	GABA	ru_RU
dc.subject	FMRFamide	ru_RU
dc.title	The neuro-glandular brain of the Pyramicocephalus phocarum plerocercoid (Cestoda, Diphyllobothriidea): immunocytochemical and ultrastructural study	ru_RU
dc.type	Articles in international journals and collections	ru_RU