scholarly journals Morphological and functional characteristics of satellite glial cells in the peripheral nervous system

2020 ◽  
Author(s):  
A. Milosavljević ◽  
J. Jančić ◽  
A. Mirčić ◽  
A. Dožić ◽  
J. Boljanović ◽  
...  
Development ◽  
2000 ◽  
Vol 127 (17) ◽  
pp. 3735-3743 ◽  
Author(s):  
V. Van De Bor ◽  
R. Walther ◽  
A. Giangrande

In flies, the choice between neuronal and glial fates depends on the asymmetric division of multipotent precursors, the neuroglioblast of the central nervous system and the IIb precursor of the sensory organ lineage. In the central nervous system, the choice between the two fates requires asymmetric distribution of the glial cell deficient/glial cell missing (glide/gcm) RNA in the neuroglioblast. Preferential accumulation of the transcript in one of the daughter cells results in the activation of the glial fate in that cell, which becomes a glial precursor. Here we show that glide/gcm is necessary to induce glial differentiation in the peripheral nervous system. We also present evidence that glide/gcm RNA is not necessary to induce the fate choice in the peripheral multipotent precursor. Indeed, glide/gcm RNA and protein are first detected in one daughter of IIb but not in IIb itself. Thus, glide/gcm is required in both central and peripheral glial cells, but its regulation is context dependent. Strikingly, we have found that only subsets of sensory organs are gliogenic and express glide/gcm. The ability to produce glial cells depends on fixed, lineage related, cues and not on stochastic decisions. Finally, we show that after glide/gcm expression has ceased, the IIb daughter migrates and divides symmetrically to produce several mature glial cells. Thus, the glide/gcm-expressing cell, also called the fifth cell of the sensory organ, is indeed a glial precursor. This is the first reported case of symmetric division in the sensory organ lineage. These data indicate that the organization of the fly peripheral nervous system is more complex than previously thought.


2021 ◽  
Vol 99 (2) ◽  
pp. 108-114
Author(s):  
A. V. Berg ◽  
G. O. Penina

The dominant position among the reasons of working-age population’s health deterioration belongs to diseases of the peripheral nervous system (PNS), the peak prevalence of which occurs at the age of 35–40. PNS diseases are diagnosed in about 76.0% of industrial workers, and account for more than half of all occupational diseases. They are the main cause of incapacitation and long-term disability. Publications on disability due to PNS diseases are isolated.The aim of the work. Clinical and functional characteristics of PNS disorders that cause disability in the working-age population.Material and methods. Among 91 496 first recognized as disabled in the Republic of Bashkortostan in 2014–2018, all disabled people of working age were selected due to PNS diseases, in which the main independent diagnosis was radiculopathy, polyneuropathy, neuropathy and vibratory disease with indication to lumbar-sacral radiculopathy with polyneuropathy of the upper extremities. 107 people were identified to constitute a closed cohort for a comprehensive study of the clinical-functional state and patterns of disability formation in them. The clinical-functional characteristic is given on the basis of the results of studies set forth in the directional medical documents and the assessment by an expert neurologist of the Main Bureau of Medical and Social Expertise. Statistical analysis was performed in Microsoft Excel.Results. The prevalence of PNS diseases has been found to be increasing. Three of the newly diagnosed neurological patients have been the carriers of PNS disease. PNS diseases are formed and reach peak in working age. Characterized by a chronic, progressive course, they often cause temporary and persistent disability. On average, there are 0.1 ± 0.028 persons with disabilities per 10 thousand of the able-bodied population due to PNS diseases, the level of which in dynamics for 2014–2018 increased by 1.7 times. Persons with disabilities (69.0%) are mainly represented by men, every second (50.6%) is over 50 years old, with an average age of 48.7 ± 5.7 years. The clinical-functional state is characterized by constant pain, numbness, seizures, restriction of movements in the limbs, sensory disorders, vegetative-vascular disorders.Conclusion. The quantitative evaluation of the main types of the body functions and main categories of vital activity persistent disorders made it possible to detect that 69.3 ± 4.4% persons with disabilities have persistent moderate abnormalities of functions in the range 40–60% (II degree), another 24.4 ± 3.8 — persistent pronounced abnormalities in the range 70–80% (III degree) and 6.3 ± 6.0% — persistent significant abnormalities in the range 90–100% (IV degree). The severity of impaired functioning of the body is the basis for the level of persistent disability determination.


Glia ◽  
2006 ◽  
Vol 53 (7) ◽  
pp. 783-787 ◽  
Author(s):  
Hongwen Gao ◽  
Chengyan He ◽  
Xuedong Fang ◽  
Xia Hou ◽  
Xuechao Feng ◽  
...  

Development ◽  
1996 ◽  
Vol 122 (1) ◽  
pp. 131-139 ◽  
Author(s):  
S. Vincent ◽  
J.L. Vonesch ◽  
A. Giangrande

Glial cells constitute the second component of the nervous system and are important during neuronal development. In this paper we describe a gene, glial cell deficient, (glide), that is necessary for glial cell fate commitment in Drosophila melanogaster. Mutations at the glide locus prevent glial cell determination in the embryonic central and peripheral nervous system. Moreover, we show that the absence of glial cells is the consequence of a cell fate switch from glia to neurones. This suggests the existence of a multipotent precursor cells in the nervous system. glide mutants also display defects in axonal navigation, which confirms and extends previous results indicating a role for glial cells in these processes.


2007 ◽  
Vol 135 (1-2) ◽  
pp. 60-61
Author(s):  
Menachem Hanani ◽  
Vitaly Belzer ◽  
Pavel S. Cherkas

Development ◽  
2013 ◽  
Vol 140 (17) ◽  
pp. 3657-3668 ◽  
Author(s):  
C. M. von Hilchen ◽  
A. E. Bustos ◽  
A. Giangrande ◽  
G. M. Technau ◽  
B. Altenhein

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