The fine structure of sensory receptor processes in the auricular epithelium of the planarian, Dugesia tigrina

MacRae, Edith K.

doi:10.1007/bf00337119

Cited by 101 publications

(31 citation statements)

References 29 publications

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“…In contrast, the dorsal surface is almost completely devoid of cilia with only small loci around the head region bearing clusters of cilia (Figure 2b). These cilia vary in size and appear to have sensory functions (MacRae, 1967; Bowen and Ryder, 1974). Numerous pores are also present on the surface of the epidermis, and represent the sites from which mucus is excreted.…”

Section: Resultsmentioning

confidence: 99%

An Outer Arm Dynein Conformational Switch Is Required for Metachronal Synchrony of Motile Cilia in Planaria

Rompolas

Patel‐King

King

2010

MBoC

105

108

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Section: Resultsmentioning

confidence: 99%

An Outer Arm Dynein Conformational Switch Is Required for Metachronal Synchrony of Motile Cilia in Planaria

Rompolas

Patel‐King

King

2010

MBoC

105

108

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“…Thus, MacRae (1967) described sensory nerve endings within the epithelium of the auricles of Dugesia tigrina. Because those cells looked similar to vertebrate olfactory cells, it was suggested that they could function as chemoreceptors (MacRae 1967). The planarian brain lies on top of the VNC that run below it (Agata et al 1998;Cebrià et al 2002c;Okamoto et al 2005).…”

Section: Structure Of the Planarian Nervous Systemmentioning

confidence: 99%

Regenerating the central nervous system: how easy for planarians!

2007

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The regenerative capabilities of freshwater planarians (Platyhelminthes) are very difficult to match. A fragment as tiny as 1/279th of the planarian body is able to regenerate a whole animal within very few days [Morgan. Arch Entwm 7:364-397 (1898)]. Although the planarian central nervous system (CNS) may appear quite morphologically simple, recent studies have shown it to be more complex at the molecular level, revealing a high degree of molecular compartmentalization in planarian cephalic ganglia. Planarian neural genes include homologues of well-known transcription factors and genes involved in human diseases, neurotransmission, axon guidance, signaling pathways, and RNA metabolism. The availability of hundreds of genes expressed in planarian neurons coupled with the ability to silence them through the use of RNA interference makes it possible to start unraveling the molecular mechanisms underlying CNS regeneration. In this review, I discuss current knowledge on the planarian nervous system and the genes involved in its regeneration, and I discuss some of the important questions that remain to be answered.

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“…[73][74][75] The sensory structures include photoreceptors, chemoreceptors and rheoreceptors, predominantly distributed in the anterior part of the body. 2,76 It is becoming evident that the planarian CNS, and in particular the brain, has a complex cytoarchitecture that is functionally regionalized to allow complex processes to be carried out. 56,[77][78][79] The CNS connects with at least three peripheralinfraepithelial, subepithelial and the submuscular-plexus (a network of nerves), as well as with a pharyngeal and an intestinal plexus that are both highly autonomous.…”

Section: Autophagy During Degrowth and Regenerationmentioning

confidence: 99%

Autophagy meets planarians

González‐Estévez

2009

Autophagy

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This review aims to demonstrate the importance of freshwater planarians as model organisms, particularly emphasizing those characteristics of the animal that make them a good model to study autophagy. The aim of this review is to provide a better understanding of autophagy in this model for the nonplanarian reader, and elucidate the relevance of autophagy research in this peculiar model organism. Furthermore, I will try to synthesize the evidence showing the importance of autophagy in planarian body remodeling, and I will discuss some ideas about the role of autophagy in stem cell biology. In light of these new developments, it is likely that the planarian field will make an important contribution to the study of the molecular mechanisms involved in autophagy in the future.

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The fine structure of sensory receptor processes in the auricular epithelium of the planarian, Dugesia tigrina

Cited by 101 publications

References 29 publications

An Outer Arm Dynein Conformational Switch Is Required for Metachronal Synchrony of Motile Cilia in Planaria

An Outer Arm Dynein Conformational Switch Is Required for Metachronal Synchrony of Motile Cilia in Planaria

Regenerating the central nervous system: how easy for planarians!

Autophagy meets planarians

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