Direct cell-cell communications and social behavior of cells in mammals, protists, and bacteria. Possible causes of multicellularity

Brodsky, V. Ya.

doi:10.1134/s1062360409020027

Cited by 11 publications

(4 citation statements)

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“…; Strassmann and Queller ). Most research in chemical signaling in nonsocial protists has focused in feeding, defense, invasiveness, or reproductive behaviors (e.g., marine eukaryotes; dinoflagellates; algae, parasitic amoeba; Brodsky ; Paul et al. ; Strom et al.…”

Section: Discussionmentioning

confidence: 99%

“…Mehdiabadi et al 2006;Strassmann and Queller 2011). Most research in chemical signaling in nonsocial protists has focused in feeding, defense, invasiveness, or reproductive behaviors (e.g., marine eukaryotes; dinoflagellates; algae, parasitic amoeba ;Brodsky 2009;Paul et al 2007;Strom et al 2007;Zaki et al 2006). Upon sensing the human pro-inflammatory cytokine tumor necrosis factor, E. histolytica trophozoites migrate directionally and initiate infection (Blazquez et al 2008;Tavares et al 2000).…”

Section: Discussionmentioning

confidence: 99%

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Discrimination, Crypticity, and Incipient Taxa in Entamoeba

Espinosa

Paz-y-Miño-C

2012

J Eukaryotic Microbiology

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Persistent difficulties in resolving clear lineages in diverging populations of prokaryotes or unicellular eukaryotes (protistan polyphyletic groups) are challenging the classical species concept. Although multiple integrated approaches would render holistic taxonomies, most phylogenetic studies are still based on single-gene or morphological traits. Such methodologies conceal natural lineages, which are considered ‘cryptic’. The concept of species is considered artificial and inadequate to define natural populations. Social organisms display differential behaviors toward kin than to non-related individuals. In ‘social’ microbes, kin discrimination has been used to help resolve crypticity. Aggregative behavior could be explored in a non-social protist to define phylogenetic varieties that are considered ‘cryptic’. Two Entamoeba invadens strains, VK-1:NS and IP-1 are considered close populations of the same ‘species’. This study demonstrates that VK-1:NS and IP-1 trophozoites aggregate only with alike members and discriminate individuals from different strains based on behavioral and chemical signals. Combined morphological, behavioral/chemical and ecological studies could improve Archamoebae phylogenies and define cryptic varieties. Evolutionary processes in which selection acted continuously and cumulatively on ancestors of Entamoeba populations gave rise to behavioral and chemical signals that allowed individuals to discriminate non-population members and gradually, to new lineages; alternative views that claim a ‘Designer’ or ‘Creator’ as responsible for protistan diversity are unfounded.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Discrimination, Crypticity, and Incipient Taxa in Entamoeba

Espinosa

Paz-y-Miño-C

2012

J Eukaryotic Microbiology

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“…Intercellular communications through soluble mediators already existed in unicellular organisms, probably for 3.5 billion years. The specialization of various cell populations in multicellular species emerged much more recently, approximately 600 million years ago [48]. In these species, both direct and indirect cellular communication mechanisms co-exist.…”

Section: Cell Communications In Multicellular Speciesmentioning

confidence: 99%

Cell Communications among Microorganisms, Plants, and Animals: Origin, Evolution, and Interplays

Combarnous

Nguyen

2020

IJMS

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Cellular communications play pivotal roles in multi-cellular species, but they do so also in uni-cellular species. Moreover, cells communicate with each other not only within the same individual, but also with cells in other individuals belonging to the same or other species. These communications occur between two unicellular species, two multicellular species, or between unicellular and multicellular species. The molecular mechanisms involved exhibit diversity and specificity, but they share common basic features, which allow common pathways of communication between different species, often phylogenetically very distant. These interactions are possible by the high degree of conservation of the basic molecular mechanisms of interaction of many ligand–receptor pairs in evolutionary remote species. These inter-species cellular communications played crucial roles during Evolution and must have been positively selected, particularly when collectively beneficial in hostile environments. It is likely that communications between cells did not arise after their emergence, but were part of the very nature of the first cells. Synchronization of populations of non-living protocells through chemical communications may have been a mandatory step towards their emergence as populations of living cells and explain the large commonality of cell communication mechanisms among microorganisms, plants, and animals.

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“…A synchronized system exhibits the same behavior throughout the system, like soldiers marching in step. Synchronized systems are frequent in nature: the human cardiac rhythm is synchronized with the respiratory system [4], lynx and hare populations are synchronized [5], synchronization is observed between solar activity and gravity [6], as well as in microbiological intracellular communication and in cell movement [7]. Synchronization is relevant for nonlinear optics, physiology and fluid dynamics [8].…”

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confidence: 99%

Synchronized smoldering combustion

Mikalsen

Hagen

Frette

2018

EPL

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Synchronized, pulsating temperatures are observed experimentally in smoldering fires. The entire sample volume (1.8 l) participates in the pulsations (pulse period 2-4 h). The synchrony lasts up to 25 h and is followed by a spontaneous transition to either disordered combustion or self-extinguishment. The synchronization is obtained when the fuel bed is cooled to the brink of extinguishment. Calculations for adiabatic conditions, including heat generation from combustion (nonlinear in temperature) and heat storage in sample (linear in temperature), predict diverging sample temperature. Experimentally, heat losses to surroundings (linear in temperature) prevent temperatures to increase without bounds and lead to pulsations.

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Direct cell-cell communications and social behavior of cells in mammals, protists, and bacteria. Possible causes of multicellularity

Cited by 11 publications

References 106 publications

Discrimination, Crypticity, and Incipient Taxa in Entamoeba

Discrimination, Crypticity, and Incipient Taxa in Entamoeba

Cell Communications among Microorganisms, Plants, and Animals: Origin, Evolution, and Interplays

Synchronized smoldering combustion

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