Monoamines in the pedal plexus of the land snail Megalobulimus oblongus (Gastropoda, Pulmonata)

Faccioni-Heuser, Maria Cristina; Zancan, Denise Maria; Achaval, Matilde

doi:10.1590/s0100-879x2004000700014

Cited by 11 publications

(4 citation statements)

References 35 publications

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“…The presence of serotonergic structures in the musculature has principally been reported in invertebrates, including nematodes (Dernovici et al,2007), cycliophora (Wanninger,2005), entoprocta (Fuchs et al,2006), platyhelminths (Stewart et al,2003; Sebelova et al,2004), annelids (Reglödi et al,1997; Csoknya et al,2005), and mollusks (Faccioni‐Heuser et al,2004). In these invertebrates the number of serotonergic peripheral neurons far exceeds those found in the central nervous system (Faccioni‐Heuser,2004). Therefore, the extensive presence of neurons in the peripheral nervous system of the sea lamprey and the preponderance of serotonergic elements in its musculature, as well as in other peripheral tissues, could be interpreted as a primitive character that appeared before divergence of vertebrates from invertebrates.…”

Section: Discussionmentioning

confidence: 99%

“…In the skin of mammals, serotonin has been implicated in enhancing inflammatory reactions by attracting mast cells at the site of tissue lesion (Kushnir‐Sukhov et al,2006), and a similar role for 5‐HT in the dermis of lampreys may occur. The absence of serotonergic structures in the epidermis contrasts with their presence in the epidermis of different invertebrates (Myhrberg,1971; Licata et al,1998; McKenzie et al,1998; Faccioni‐Heuser et al,2004) and vertebrates (Zaccone,1986; García‐Caballero et al,1989; Zaccone et al,1990,1994; Fasulo et al,1993). The presence of serotonin in epidermal Merkel cells has been reported in teleosts, amphibians, dipnoans, and mammals (Whitear,1989; García‐Caballero et al,1989; English et al,1992; Zaccone et al,1994).…”

Section: Discussionmentioning

confidence: 99%

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Extensive presence of serotonergic cells and fibers in the peripheral nervous system of lampreys

Barreiro‐Iglesias

Aldegunde

Anadón

et al. 2008

J of Comparative Neurology

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Lampreys are suitable animal models for studying the evolution of the vertebrate nervous system because they belong to the earliest group of extant vertebrates, the agnathans. The general organization of the serotonergic central nervous system is well known in lampreys, but information about its peripheral organization is lacking. In the present study, high-performance liquid chromatography and immunohistochemistry with an antibody against serotonin were used to study the presence and peripheral distribution of serotonergic elements in the head of larval sea lampreys. Adult lampreys were also analyzed in order to compare the organization of the system in larval and postmetamorphic stages. Serotonergic cells were observed in the cranial nerve ganglia, the musculature, the taste buds, and in the gills. Serotonergic fibers were extensive in all tissues except the epidermis. Possible roles were proposed for the different cell types observed in relation to their location, structure, and innervation patterns. The serotonergic cells appear to be involved in the oxygen and taste chemoreception processes, the modulation of musculature contraction, and in the regulation of cilia beat frequency and mucus secretion in lampreys. The extensive presence of serotonergic elements in the peripheral nervous system of lampreys suggests a close relationship with the organization of this system in invertebrate groups.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Extensive presence of serotonergic cells and fibers in the peripheral nervous system of lampreys

Barreiro‐Iglesias

Aldegunde

Anadón

et al. 2008

J of Comparative Neurology

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“…The presence of transporting proteins for different ions in a variety of snail cells have already been shown and could be expressed in epithelial cell (ROBERTSON 1964;ISTIN & FOSSAT 1972;SIMKISS 1988;FUNASE et al 1993;ILIEV & MARINO 1993;AHEARN et al 1994;BARNES et al 1994;BREID-BACH & KUTSCH 1995;GREGER 1996;DONOVAN & CAREFOOT 1997;TYRAKOWSKI et al 1998;PIVAROV & DROZDOWA 2002a, b;FACCIONI et al 2004).…”

Section: ±78 210±20mentioning

confidence: 97%

“…Epithelial cells of snail foot are tightly connected and from the apical site they have cilia and microcilia (DENNY 1984;SIMKISS 1988;FACCIONI et al 2004). This epithelium regulates the quantity of water in the mucus, excretion of metabolites, and transepithelial ion fluxes; it also takes part in locomotive activity as the snail is isolated from a substratum by a mucous layer which alternately acting as glue or lubricant (MORTON 1964(MORTON , 1988ROBERT-SON 1964;DENNY 1980DENNY , 1984DENNY , 1989ENYIKWOLA & BURTON 1983;SIMKISS 1988;CHIASSON et al 1994;GREGER 1996;FACCIONI et al 2004).…”

Section: The Experimental Model Characteristicsmentioning

confidence: 99%

The Electrical Potential Difference through the Foot Epithelium of the Snail Achatina achatina, Lameere during Mechanical and Chemical Stimulation

Tyrakowski

Hołyńska²,

Lampka³

et al. 2006

folia biol (krakow)

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An important electrophysiological variable-the transepithelial potential difference reflects the electrogenic transepithelial ion currents, which are produced and modified by ion transport processes in polarized cells of epithelium. These processes result from coordinated function of transporters in apical and basolateral cell membranes and have been observed in all epithelial tissues studied so far. The experiments were performed on isolated specimens of snail foot. In the experiments, the baseline transepithelial electrical potential difference-PD, changes of transepithelial difference during mechanical stimulation-dPD and the transepithelial resistance were measured with an Ussing apparatus. A total of 60 samples of foot ventral surface of 28 snails were studied. The transepithelial electrical potential difference of isolated foot ranged from-6.0 to 10.0 mV under different experimental conditions. Mechanical stimulation of foot ventral surface caused changes of electrogenic ion transport, observed as transient hyperpolarization (electrical potential difference became more positive). When the transepithelial electrical potential difference decreased during stimulation, the reaction was described as depolarization. When amiloride and bumetanide were added to the stimulating fluid so that the sodium and chloride ion transport pathways were inhibited, prolonged depolarization occurred. Under the influence of different stimuli: mechanical (gentle rinsing), chemical (changes of ion concentrations) and pharmacological (application of ion inhibitors), transient changes of potential difference (dPD) were evoked, ranging from about-0.7 to almost 2.0 mV. Changes in transepithelial potential difference of the pedal surface of the snail's foot related to these physiological stimuli are probably involved in the locomotion of the animal and are under control of the part of the nervous system in which tachykinin related peptides (TRP) act as transmitters.

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Serotonergic immunoreactivity in the pedal ganglia of the pulmonate snail Megalobulimus abbreviatus after thermal stimulus: A semi-quantitative analysis

Swarowsky

Monteiro

Xavier

et al. 2005

Comparative Biochemistry and Physiology Part A: Molecular &

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Monoamines in the pedal plexus of the land snail Megalobulimus oblongus (Gastropoda, Pulmonata)

Cited by 11 publications

References 35 publications

Extensive presence of serotonergic cells and fibers in the peripheral nervous system of lampreys

Extensive presence of serotonergic cells and fibers in the peripheral nervous system of lampreys

The Electrical Potential Difference through the Foot Epithelium of the Snail Achatina achatina, Lameere during Mechanical and Chemical Stimulation

Serotonergic immunoreactivity in the pedal ganglia of the pulmonate snail Megalobulimus abbreviatus after thermal stimulus: A semi-quantitative analysis

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