Mammalian Bone Marrow Acetylcholinesterase

Author(s):  
Ezzatollah Keyhani

Acetylcholinesterase (EC 3.1.1.7) (ACHE) has been localized at cholinergic junctions both in the central nervous system and at the periphery and it functions in neurotransmission. ACHE was also found in other tissues without involvement in neurotransmission, but exhibiting the common property of transporting water and ions. This communication describes intracellular ACHE in mammalian bone marrow and its secretion into the extracellular medium.

1973 ◽  
Vol 71 (1-2) ◽  
pp. 1-8 ◽  
Author(s):  
Sylvio Celso Goncalves da Costa ◽  
Samuel B. Pessoa ◽  
Neize de Moura Pereira ◽  
Tania Colombo

The main object of the present paper is to furnish a brief account to the knowledgement of Protozoa parasitic in common Brazilian frog of the genus Leptodactylus for general students in Zoology and for investigators that use this frog as a laboratory animal. Hepatozoon leptodactyli (Haemogregarina leptodactyli) was found in two species of frogs - Leptodactylus ocellatus and L. pentadactylus - in which develop schizogony whereas sporogony occurs in the leech Haementeria lutzi as was obtainded in experimental conditions. Intracellular forms have been found in peripheral circulation, chiefly in erythrocytes, but we have found them in leukocytes too. Tissue stages were found in frog, liver, lungs, spleen, gut, brain and heart. The occurence of hemogregarine in the Central Nervous System was recorded by Costa & al,(13) and Ball (2). Some cytochemical methods were employed in attempt to differentiate gametocytes from trophozoites in the peripheral blood and to characterize the cystic membrane as well. The speorogonic cycle was developed in only one specie of leech. A brief description of the parasite is given.


Development ◽  
1994 ◽  
Vol 120 (5) ◽  
pp. 1151-1161 ◽  
Author(s):  
Y. Zhang ◽  
A. Ungar ◽  
C. Fresquez ◽  
R. Holmgren

Previous studies have shown that the segment polarity locus gooseberry, which contains two closely related transcripts gooseberry-proximal and gooseberry-distal, is required for proper development in both the epidermis and the central nervous system of Drosophila. In this study, the roles of the gooseberry proteins in the process of cell fate specification have been examined by generating two fly lines in which either gooseberry-distal or gooseberry-proximal expression is under the control of an hsp70 promoter. We have found that ectopic expression of either gooseberry protein causes cell fate transformations that are reciprocal to those of a gooseberry deletion mutant. Our results suggest that the gooseberry-distal protein is required for the specification of naked cuticle in the epidermis and specific neuroblasts in the central nervous system. These roles may reflect independent functions in neuroblasts and epidermal cells or a single function in the common ectodermal precursor cells. The gooseberry-proximal protein is also found in the same neuroblasts as gooseberry-distal and in the descendants of these cells.


Author(s):  
Andrea C. Adams

Many immune-mediated diseases and infections affect the central and peripheral nervous systems. The common feature that characterizes both immune-mediated diseases and infections is a subacute temporal profile. Immune-mediated disease can affect only the nervous system or involve the nervous system as part of a systemic illness, as in vasculitis and connective tissue disease. Multiple sclerosis (MS), the most common disabling neurologic illness of young people, is the prototypical immune-mediated disease of the central nervous system (CNS).


Oncoreview ◽  
2016 ◽  
Vol 6 (4) ◽  
pp. 0-0 ◽  
Author(s):  
Łukasz Galus

Ifosfamide is a cytostatic drug commonly used in chemotherapy. One of the common adverse effects resulting from the treatment with ifosfamide is encephalopathy. This paper describes a case study of a 64-year-old patient who suffered from a full-blown encephalopathy as a result of chemotherapy administered during the treatment of fibrosarcoma of the femur. It provides a hypothesis of the mechanism behind toxic effects of ifosfamide on the central nervous system and elaborates on a number of documented ways of preventing aforementioned complications.


2008 ◽  
Vol 173 (6) ◽  
pp. 1669-1681 ◽  
Author(s):  
Sonja Hochmeister ◽  
Manuel Zeitelhofer ◽  
Jan Bauer ◽  
Eva-Maria Nicolussi ◽  
Marie-Therese Fischer ◽  
...  

2020 ◽  
Author(s):  
Shahrzad Nazari ◽  
Amirhossein Azari Jafari ◽  
Seyyedmohammadsadeq Mirmoeeni ◽  
Saeid Sadeghian ◽  
Mohammad Eghbal Heidari ◽  
...  

Background: At the end of December 2019, a novel respiratory infection, initially reported in China, known as COVID-19 initially reported in China, and later known as COVID-19, led to a global pandemic. Despite many studies reporting respiratory infections as the primary manifestations of this illness, an increasing number of investigations have focused on the central nervous system (CNS) manifestations in COVID-19. In this study, we aimed to evaluate the CNS presentations in COVID-19 patients in an attempt to identify the common CNS features and provide a better overview to tackle this new pandemic. Methods: In this systematic review and meta-analysis, we searched PubMed, Web of Science, Ovid, Embase, Scopus, and Google Scholar. Included studies were publications that reported the CNS features between January 1st, 2020, to April 20th, 2020. The data of selected studies were screened and extracted independently by four reviewers. Extracted data analyzed by using STATA statistical software. The study protocol registered with PROSPERO (CRD42020184456). Results: Of 2353 retrieved studies, we selected 64 studies with 11282 patients after screening. Most of the studies were conducted in China (58 studies). The most common CNS symptom of COVID-19 were Headache (8.69%, 95%CI: 6.76%-10.82%), Dizziness (5.94%, 95%CI: 3.66%-8.22%), and Impaired consciousness (1.9%, 95%CI: 1%-2.79%). Conclusions: The growing number of studies have reported COVID-19, CNS presentations as remarkable manifestations that happen. Hence, understanding the CNS characteristics of COVID-19 can help us for better diagnosis and ultimately prevention of worse outcomes.


2021 ◽  
Author(s):  
Rafael Bragança Rodrigues Matias ◽  
Bruna Cardoso de Mattos Boccalini ◽  
Renata de Oliveira Costa ◽  
Maria Fernanda Mélega Mingossi

Introduction: Mantle cell lymphoma (MCL) is a subtype of uncommon nonHodgkin lymphoma. The involvement of the central nervous system (CNS) is uncommon in the course of the disease. Objective: To report a case of recurrence of MCL in the CNS as the first manifestation, after chemotherapy and bone marrow transplantation. Case report: Male patient, 49 years old, with no previous comorbidities diagnosed with stage IV MCL (bone marrow), submitted to chemotherapy and autologous transplantation. After two years, he sought out the neurology clinic with a complaint of blurred vision. Neurological examination: without motor deficit; bilateral partial ptosis, bilateral divergent strabismus, tongue shift to the right. CSF with 230 leukocytes/mm³, 70% of lymphocytes, glucose of 71 mg /dl and protein of 85 mg /dl; Skull MRI demonstrated bilateral and symmetrical enhancement of segments of the cisterns of the optic and oculomotor nerves; Trigeminal, facial, vestibulocochlear and glossopharyngeal, vagus and accessory nerves more exuberant on the left. CSF immunophenotyping showed CD19, CD5 and Kappa positive monoclonal, compatible with MCL recurrence. Intrathecal and systemic chemotherapy with methotrexate were initiated. Discussion: Risk of recurrence of MCL and infiltration of the CNS is uncommon (3.9 - 5%). The patient did not show any signs of systemic involvement, only the neurological findings, which is atypical since the neurological presentation is more associated with recurrence of MCL with a course of systemic findings. Conclusion:The authors point out that in patients with treated MCL who have neurological manifestations without systemic findings, tumor recurrence should be considered.


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