Biogenic amines in the nervous system of nemerteans

Zaitseva, O. V.; Petrov, S. A.

doi:10.1134/s001249661304008x

Cited by 7 publications

(16 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Efferent innervation of the radular sac and the mouth tube is observed. Thus, in juvenile C. laevis monoamines already take an active part in the regulation of the sensory functions, in the functioning of the musculature and the digestive system and can participate in the feeding behaviour, as it was shown for adult individuals of previously studied species of gastropods and other invertebrates (Quinlan et al, 1997;Croll, 2001;Markosova et al, 2007;Zaitseva, Petrov, 2013).…”

Section: Resultsmentioning

confidence: 71%

Distribution of monoamines and neuropeptides in the digestive system of juvenile Cadlina laevis (Nudibranchia)

Зайцева

Shumeev²

2017

Invertzool

Self Cite

View full text Add to dashboard Cite

Whole mount preparations of juvenile Cadlina laevis aged 2-4 months after hatching were examined by immunocytochemistry and histochemistry in conjunction with confocal laser microscopy to study the architecture of the digestive system, its musculature and distribution in the digestive system of catecholamine-containing, 5-HT and FMRFamide-immunoreactive (im) nervous elements. The largest number of catecholaminecontaining and FMRFamide-im nervous elements was found in the wall of the pharynx, the stomach and the digestive gland. The 5-HT-im innervation was observed primarily in the pharyngeal region of the digestive system. Catecholamine-containing and FMRFamide-im receptor cells were revealed in the oral velum around the mouth. How to cite this article: Zaitseva O.V., Shumeev A.N. 2017. Distribution of monoamines and neuropeptides in the digestive system of juvenile Cadlina laevis (Nudibranchia) // Invert.

show abstract

Section: Resultsmentioning

confidence: 71%

Distribution of monoamines and neuropeptides in the digestive system of juvenile Cadlina laevis (Nudibranchia)

Зайцева

Shumeev²

2017

Invertzool

Self Cite

View full text Add to dashboard Cite

show abstract

“…Serotonin-positive cells found in the cardioesophageal ring in some bryozoans are likely to be intraepithelial receptor cells as their apical part contact the intestine internal surface. The same type of cells has been found in the digestive system of invertebrate and even vertebrate animals (although in vertebrates such cells are receptory-endocrine) (Zaitseva et al, 2004(Zaitseva et al, , 2007(Zaitseva et al, , 2013Ovsyannikov, 2003).…”

Section: Resultsmentioning

confidence: 75%

“…For some invertebrates presence of 5-HTpositive sensory cells was shown in the middle part of the gut (where digestion is going), and such cells are also able for exocrine secretion of serotonin inside its cavity (Zaitseva et al, 2004(Zaitseva et al, , 2007(Zaitseva et al, , 2013. Serotonin-positive cells found in the cardioesophageal ring in some bryozoans are likely to be intraepithelial receptor cells as their apical part contact the intestine internal surface.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Monoamines and neuropeptides in Bryozoa: localisation and possible functions

Shunkina

Зайцева²

2017

Invertzool

Self Cite

View full text Add to dashboard Cite

Recently many data on distribution of common neuromediators in different bryozoan species were published. Based on the three species of freshwater bryozoans, we compare our results with those from other studies in attempt to understand possible role of each neuromediator (serotonin, FMRFamide, catecholamine) in the nervous system of Bryozoa. Serotonin appears to be responsible for feeding behavior and digestion, FMRFamide mainly participate in the muscles innervation and catecholaminergic cells could be mechanoreceptors.

show abstract

“…1 , nk2.2, dach, svp, tll ) and rhynchocoel ( bf1, arx ), two morphological apomorphies of Nemertea [15, 16]. Taking into account that the proboscis is a highly innervated structure [this study; also 15-20, 22, 23, 25, 26, 29, 57, 58, 90], the neuronal genes in the proboscis might be expressed in the developing neuronal network of the organ. Comparable results were obtained by body region-specific transcriptomics of the nemertean Notospermus geniculatus , in which expression of some of the neuronal markers (e.g.…”

Section: Discussionmentioning

confidence: 99%

Gene expression in the developing nemertean brain indicates convergent evolution of complex brains in Spiralia

Gąsiorowski

Børve

et al. 2021

Preprint

View full text Add to dashboard Cite

Background: Nemertea is a clade of worm-like animals, which belongs to a larger animal group called Spiralia (together with e.g. annelids, flatworms and mollusks). Many of the nemertean species possess a complex central nervous system (CNS) with a prominent brain, and elaborated chemosensory and neuroglandular cerebral organs, which have been suggested as homologues to the annelid mushroom bodies. In order to understand the developmental and evolutionary origins of complex nemertean brain, we investigated details of neuroanatomy and gene expression in the brain and cerebral organs of the juveniles of nemertean Lineus ruber. Results: In the hatched juveniles the CNS is already composed of all major elements present in the adults, including the brain (with dorsal and ventral lobes), paired longitudinal lateral nerve cords and an unpaired dorsal nerve cord. The TEM investigation of the juvenile cerebral organ revealed that the structure is already composed of several distinct cell types present also in the adults. We further investigated the expression of twelve transcription factors commonly used as brain and cell type markers in bilaterian brains, including genes specific for annelid mushroom bodies. The expression of the investigated genes in the brain is region-specific and divides the entire organ into several molecularly distinct areas, partially overlapping with the morphological compartments. Additionally, we detected expression of mushroom body specific genes in the developing cerebral organs. Conclusions: At the moment of hatching, the juveniles of L. ruber already have a similar neuroarchitecture as adult worms, which suggests that further neural development is mostly related with increase in the size but not in complexity. Comparison in the gene expression between L. ruber and the annelid Platynereis dumerilii and other spiralians, indicates that the complex brains present in those two species evolved convergently by independent expansion of non-homologues regions of the simpler brain present in their common ancestor. The similarities in gene expression in mushroom bodies and cerebral organs might be a result of the convergent recruitment of the same genes into patterning of non-homologues organs or the results of more complicated evolutionary processes, in which conserved and novel cell types contribute to the non-homologues structures.

show abstract

Biogenic amines in the nervous system of nemerteans

Cited by 7 publications

References 13 publications

Distribution of monoamines and neuropeptides in the digestive system of juvenile Cadlina laevis (Nudibranchia)

Distribution of monoamines and neuropeptides in the digestive system of juvenile Cadlina laevis (Nudibranchia)

Monoamines and neuropeptides in Bryozoa: localisation and possible functions

Gene expression in the developing nemertean brain indicates convergent evolution of complex brains in Spiralia

Contact Info

Product

Resources

About