Histopathological, Ultrastructural, and Immunohistochemical Assessment of Hippocampus Structures of Rats Exposed to TCDD and High Doses of Tocopherol and Acetylsalicylic Acid

The effect of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) on central nervous system consists of changing expression of estrogen receptors, whereas the result of chronic inflammatory reaction caused by dioxin is occurrence of destructive changes in various organs connected with disturbed metabolism of connective tissue and damage of cells. The aim of the study was to determine the effect of dioxins on function, ultrastructure, and cytological and histological structure of hippocampus, particularly on expression of estrogen receptors in central nervous system as well as to define protective influence of tocopherol (TCP) and acetylsalicylic acid (ASA) on the decrease in activity of proinflammatory effects in central nervous system. It was shown that TCDD contributes to destructive and inflammatory changes along with demyelization of myelin sheaths and atrophy of estrogen receptors in hippocampus. Dioxin contributes to atrophy of estrogen receptors in hippocampus, in which also destructive and inflammatory changes were found along with demyelination of myelin sheaths. Histopathological and ultrastructural image of hippocampus areas in rats, in which both TCP and ASA were used, is characterized by poorly expressed degenerative changes and smaller inflammatory reactivity. Using both TCP and ASA has a protective effect on functions of central nervous system.

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Biology of the repair of central nervous system demyelinated lesions: an appraisal

Arquivos de Neuro-Psiquiatria ◽

10.1590/s0004-282x1996000200026 ◽

1996 ◽

Vol 54 (2) ◽

pp. 331-334 ◽

Cited By ~ 3

Author(s):

L. A. V Peireira ◽

M. A. Cruz-Höfling ◽

M. S. J. Dertkigil ◽

D. L. Graça

Keyword(s):

Central Nervous System ◽

Nervous System ◽

Schwann Cells ◽

Demyelinating Disease ◽

Experimental Models ◽

Primitive Cell ◽

Marked Influence ◽

Myelin Sheaths ◽

Human Material ◽

The Central Nervous System

The integrity of myelin sheaths is maintained by oligodendrocytes and Schwann cells respectively in the central nervous system (CNS) and in the peripheral nervous system. The process of demyelination consisting of the withdrawal of myelin sheaths from their axons is a characteristic feature of multiple sclerosis, the most common human demyelinating disease. Many experimental models have been designed to study the biology of demyelination and remyelination (repair of the lost myelin) in the CNS, due to the difficulties in studying human material. In the ethidium bromide (an intercalating gliotoxic drug) model of demyelination, CNS remyelination may be carried out by surviving oligodendrocytes and/or by cells differentiated from the primitive cell lines or either by Schwann cells that invade the CNS. However, some factors such as the age of the experimental animals, intensity and time of exposure to the intercalating chemical and the topography of the lesions have marked influence on the repair of the tissue.

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Immunohistochemical assessment of human herpesvirus 8 infection in primary central nervous system large B cell lymphomas

Journal of Clinical Pathology ◽

10.1136/jcp.54.8.617 ◽

2001 ◽

Vol 54 (8) ◽

pp. 617-618 ◽

Cited By ~ 1

Author(s):

A Gomez-Brouchet

Keyword(s):

Central Nervous System ◽

Nervous System ◽

B Cell ◽

Human Herpesvirus ◽

Human Herpesvirus 8 ◽

B Cell Lymphomas ◽

Herpesvirus 8 ◽

Immunohistochemical Assessment ◽

Large B Cell

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Inflammatory Chemokines Expression Variations and Their Receptors in APP/PS1 Mice

Journal of Alzheimer s Disease ◽

10.3233/jad-210489 ◽

2021 ◽

pp. 1-10

Author(s):

Adrián Jorda ◽

Martin Aldasoro ◽

Constanza Aldasoro ◽

Soraya L. Valles

Keyword(s):

Central Nervous System ◽

Nervous System ◽

Chemokine Receptors ◽

Presenilin 1 ◽

Wild Type ◽

Rt Pcr ◽

New Strategy ◽

Inflammatory Chemokines ◽

Inflammatory Changes ◽

Old Mice

Background: In Alzheimer’s disease (AD), an increase in inflammation is distinctive. Amyloid precursor protein plus presenilin-1 (APP/PS1 mice) is a model for this illness. Chemokines secreted by central nervous system (CNS) cells could play multiple important roles in AD. Data looking for the chemokines involved in inflammatory mechanisms are lacking. To understand the changes that occur in the inflammation process in AD, it is necessary to improve strategies to act on specific inflammatory targets. Objective: Chemokines and their receptors involved in phagocytosis, demyelination, chemotaxis, and coagulation were the objective of our study. Methods: Female APPswe/PS1 double-transgenic mice (B6C3-Tg) were used and cortex brain from 20–22-month-old mice obtained and used to quantify chemokines and chemokine receptors expression using RT-PCR technique. Results: Significant inflammatory changes were detected in APP/PS1 compared to wild type mice. CCR1, CCR3, CCR4, and CCR9 were elevated, and CCR2 were decreased compared with wild type mice. Their ligands CCL7, CCL11, CCL17, CCL22, CCL25, and CXCL4 showed an increase expression; however, changes were not observed in CCL2 in APP/PS1 compared to wild type mice. Conclusion: This change in expression could explain the differences between AD patients and elderly people without this illness. This would provide a new strategy for the treatment of AD, with the possibility to act in specific inflammatory targets.

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Development of adrenomedullary function in suckling rats: Effects of high doses of thyroxine and cortisol

Acta Endocrinologica ◽

10.1530/acta.0.1230100 ◽

1990 ◽

Vol 123 (1) ◽

pp. 100-107

Author(s):

L. Goya ◽

C. Aláez ◽

A. M. Pascual-Leone

Keyword(s):

Central Nervous System ◽

Nervous System ◽

Adrenal Glands ◽

Normal Development ◽

Insulin Administration ◽

Newborn Rats ◽

Short Intervals ◽

Slowing Down ◽

The Central Nervous System ◽

High Doses

Abstract. The development of epinephrine, norephinephrine, and total catecholamine secretion in plasma and andrenal glands was studied in newborn rats at short intervals: at day 2, 4, 6, 8, 10, 12 and 23. The increase in the plasma level of epinephrine represents a maturation of the secretion of the adrenal medulla. The increase in plasma of epinephrine and norepinephrine and the content of catecholamines in the adrenal glands of both normal animals and those treated with either high doses of T4 or cortisol at birth suggest a slowing down of the normal development of epinephrine secretion. This was confirmed by inducing hypoglycemia in these three groups of animals by a 20-h fast or by insulin administration (0.1436 μmol/kg). We conclude that both high doses of T4 and cortisol administered at birth seem to retard the development of the autonomic nervous system similar to the effect on the central nervous system.

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High Efficiency of ICE (Ifosfamide-Carboplatin-Etoposide) in Relapse/Refractory Primary Central-Nervous System and Intra-Ocular Non Hodgkin Lymphoma, After First Line Treatment Containing High Doses of Methotrexate and Cytarabine. A Monocentric Retrospective Study From 2010 to 2012 On 17 Cases

Blood ◽

10.1182/blood.v120.21.3664.3664 ◽

2012 ◽

Vol 120 (21) ◽

pp. 3664-3664 ◽

Cited By ~ 1

Author(s):

Sylvain Choquet ◽

Damien roos Weil ◽

Khe Hoang Xuan ◽

Nathalie Cassoux ◽

Helene Merle-Beral ◽

...

Keyword(s):

Central Nervous System ◽

Nervous System ◽

Hodgkin Lymphoma ◽

Salvage Chemotherapy ◽

High Dose ◽

Line Treatment ◽

First Line ◽

Non Hodgkin Lymphoma ◽

High Doses ◽

First Line Treatment

Abstract Abstract 3664 Background: Primary central nervous system lymphoma (PCNSL) and primary intra-ocular lymphoma (PIOL) are at very high risk of relapse after a first line treatment, and then carry a very poor prognosis. Autologous stem cell transplantation (ASCT) can offer prolonged responses but its results clearly depend on efficiency of salvage chemotherapy (Soussain, haemtologica, 2012). Since recent publications on first line treatment of PCNSL and PIOL recommend high dose methotrexate (Mtx) and cytarabine (AraC) (Ferreri, Lancet 2009), salvage chemotherapy must use other drugs with high level of penetration in the central nervous system (CNS). In this setting, ICE regimen, validated in systemic non Hodgkin lymphoma, seems to be appropriated but no data is published in PCNSL and PIOL. Methods: From june 2010 to may 2012, all relapse/refractory PCNSL and PIOL treated in first line by high doses of Mtx and AraC in the Pitie-Salpetriere Hospital, Paris, France, where treated by ICE regimen : ifosfamide (5g/m2 at day 2), carboplatine (AUC 5 at day 2) and etoposide (100mg/m2/d days 1 to 3). Doses where adapted on patient general status and ASCT proposed when possible. Results: Seventeen patients have been treated, 7 females and 10 males, median age 62 [28–84]. Four where refractory and 13 in relapse, with a mean progression free survival (PFS) of 368 days [85–1763], 4 had a second line, one a third before ICE. At moment of ICE treatment, localizations where 10 CNS, 2 CNS + PIOL, 3 PIOL and 2 meningitis. The mean number of cycles was 4 [1–6] and 4 patients needed a dose reduction. During treatment, grade 3/4 WHO toxicities where: 6 neutropenic fever (one death), 5 anemia, 9 neutropenia, 10 thrombopenia and one CNS complication (coma and hypersalivation). ASCT have been made in 6 patients (5 in CR, 1 in PR) and are pending in 3. Complete response (CR) have been obtained in 13 patients (76%), partial in 2. With a mean follow-up of 405 days, 6/15 patients in response relapsed (only one after ASCT), in a median of 81 days, 9 patients died (7 by progression, one during treatment and one in CR). Median Overall survival (OS) was 220 days for all patients but was not reached in case of ASCT. Conclusion: ICE regimen is very effective in relapse/refractory PCNSL and PIOL heavily treated by high dose Mtx and AraC. This efficacy can allow to perform ASCT in eligible patients, chemosensitivity being the most important factor influencing the OS and PFS after ASCT. ICE can represent a new standard in this setting. Disclosures: Leblond: Roche: Advisory Board Other, Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees; Mundipharma: Honoraria; Janssen-Cilag: Honoraria.

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A STRUCTURAL ANALYSIS OF THE MYELIN SHEATH IN THE CENTRAL NERVOUS SYSTEM

The Journal of Cell Biology ◽

10.1083/jcb.34.2.555 ◽

1967 ◽

Vol 34 (2) ◽

pp. 555-567 ◽

Cited By ~ 131

Author(s):

Asao Hirano ◽

Herbert M. Dembitzer

Keyword(s):

Central Nervous System ◽

Nervous System ◽

Electron Microscope ◽

Myelin Sheath ◽

Cerebral White Matter ◽

Experimental Conditions ◽

Myelin Sheaths ◽

Basic Theme ◽

Cell Processes ◽

The Central Nervous System

The cerebral white matter of rats subjected to a variety of noxious experimental conditions was examined in the electron microscope. Several unusual configurations of the myelin sheath are identified in addition to the usual configuration. These variations include the presence of (a) formed organelles within the inner and outer loops, (b) isolated islands of cytoplasm in unfused portions of the major dense lines, (c) apparently unconnected cell processes between the sheath and the axon, and (d) concentric, double myelin sheaths. A generalized model of the myelin sheath based on a hypothetical unrolling of the sheath is described. It consists of a shovel-shaped myelin sheet surrounded by a continuous thickened rim of cytoplasm. Most of the unusual myelin configurations are explained as simple variations on this basic theme. With the help of this model, an explanation of the formation of the myelin sheath is offered. This explanation involves the concept that myelin formation can occur at all cytoplasmic areas adjacent to the myelin proper and that adjacent myelin lamellae can move in relation to each other.

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