scholarly journals Neuroprotective activity of a new erythropoietin formulation with increased penetration in the central nervous system

2011 ◽  
Vol 5 (S8) ◽  
Author(s):  
Marina Etcheverrigaray ◽  
Natalia Ceaglio ◽  
Mónica Mattio ◽  
Marcos Oggero ◽  
Ignacio Amadeo ◽  
...  
2018 ◽  
Vol 2018 ◽  
pp. 1-8 ◽  
Author(s):  
Yan Fu ◽  
Jianmei Yang ◽  
Xingyu Wang ◽  
Pin Yang ◽  
Yang Zhao ◽  
...  

Since microglia possess both neuroprotective and neurotoxic potential, they play a crucial role in the central nervous system (CNS). Excessive microglial activation induces inflammation-mediated neuronal damage and degeneration. At present, numerous herbal compounds are able to suppress neurotoxicity via inhibiting microglial activation. Therefore, many researchers focus on pharmacological inhibitors of microglial activation to ameliorate neurodegenerative disorders. Further work should concentrate on the exploration of new herbal compounds, which characteristically inhibit microglial neurotoxicity, rather than modulating neuroprotection alone. In this review, we summarize these herbal compounds, which in the past several years have been shown to exert potential neuroprotective activity by inhibiting microglial activation. The therapeutic targets and pharmacological mechanisms of these compounds have also been discussed.


Cancers ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 1717
Author(s):  
Elżbieta Studzińska-Sroka ◽  
Aleksandra Majchrzak-Celińska ◽  
Przemysław Zalewski ◽  
Dominik Szwajgier ◽  
Ewa Baranowska-Wójcik ◽  
...  

Lichen secondary metabolites are characterized by huge pharmacological potential. Our research focused on assessing the anticancer and neuroprotective activity of Hypogymnia physodes acetone extract (HP extract) and physodic acid, its major component. The antitumor properties were evaluated by cytotoxicity analysis using A-172, T98G, and U-138 MG glioblastoma cell lines and by hyaluronidase and cyclooxygenase-2 (COX-2) inhibition. The neuroprotective potential was examined using COX-2, tyrosinase, acetylcholinesterase (AChE), and butyrylcholinesterase (BChE) activity tests. Moreover, the antioxidant potential of the tested substances was examined, and the chemical composition of the extract was analyzed. For physodic acid, the permeability through the blood–brain barrier using Parallel Artificial Membrane Permeability Assay for the Blood–Brain Barrier assay (PAMPA-BBB) was assessed. Our study shows that the tested substances strongly inhibited glioblastoma cell proliferation and hyaluronidase activity. Besides, HP extract diminished COX-2 and tyrosinase activity. However, the AChE and BChE inhibitory activity of HP extract and physodic acid were mild. The examined substances exhibited strong antioxidant activity. Importantly, we proved that physodic acid crosses the blood–brain barrier. We conclude that physodic acid and H. physodes should be regarded as promising agents with anticancer, chemopreventive, and neuroprotective activities, especially regarding the central nervous system diseases.


Today, in medical practice, a very promising direction of development can be the expansion of the range of primary and secondary neuroprotection drugs through the use of targeted synthesis of potential neuroprotective agents with analeptic effect. This is necessary to improve anesthetic safety during surgery and to alleviate post-anesthetic intoxication after anesthesia. Therefore, the aim of our study was to compare the neuroprotective activity of original derivatives of sulfur and nitrogen-containing heterocycles (heterosides) and reference drugs, which are already known in pharmacology (cerebroprotective agent with neurotrophic action ¾ cerebrocurin and nootropic drug with neuroprotective action ¾ noopept). In the course of the research, it was found that after ketamine anesthesia, the excitability of the central nervous system increases, the anxious behavior of animals increases, while the indicators of the research work of animals in the experiment sharply deteriorate. After 2 days or more (10 days) after the transferred ketamine anesthesia, a deterioration in mnestic functions was noted in this group of animals. With the introduction of 100 mg / kg of heteroside to a group of rats after ketamine anesthesia, the indicators of anxiety behavior and excitability of animals significantly decreased, their research activity increased, a pronounced antiamnestic effect was manifested, and the ability of animals to learn was increased as well. It also turned out that in terms of the degree of influence on the indicators of the cognitive-mnestic functions of the central nervous system, heteroside statistically significantly exceeds the comparison drugs cerebrocurin and noopept, which in turn showed high efficiency in reducing anxiety of animals, and also had an antiamnestic effect, but did not affect the ability of animals to learn.


Author(s):  
Gladys Harrison

With the advent of the space age and the need to determine the requirements for a space cabin atmosphere, oxygen effects came into increased importance, even though these effects have been the subject of continuous research for many years. In fact, Priestly initiated oxygen research when in 1775 he published his results of isolating oxygen and described the effects of breathing it on himself and two mice, the only creatures to have had the “privilege” of breathing this “pure air”.Early studies had demonstrated the central nervous system effects at pressures above one atmosphere. Light microscopy revealed extensive damage to the lungs at one atmosphere. These changes which included perivascular and peribronchial edema, focal hemorrhage, rupture of the alveolar septa, and widespread edema, resulted in death of the animal in less than one week. The severity of the symptoms differed between species and was age dependent, with young animals being more resistant.


Author(s):  
John L.Beggs ◽  
John D. Waggener ◽  
Wanda Miller ◽  
Jane Watkins

Studies using mesenteric and ear chamber preparations have shown that interendothelial junctions provide the route for neutrophil emigration during inflammation. The term emigration refers to the passage of white blood cells across the endothelium from the vascular lumen. Although the precise pathway of transendo- thelial emigration in the central nervous system (CNS) has not been resolved, the presence of different physiological and morphological (tight junctions) properties of CNS endothelium may dictate alternate emigration pathways.To study neutrophil emigration in the CNS, we induced meningitis in guinea pigs by intracisternal injection of E. coli bacteria.In this model, leptomeningeal inflammation is well developed by 3 hr. After 3 1/2 hr, animals were sacrificed by arterial perfusion with 3% phosphate buffered glutaraldehyde. Tissues from brain and spinal cord were post-fixed in 1% osmium tetroxide, dehydrated in alcohols and propylene oxide, and embedded in Epon. Thin serial sections were cut with diamond knives and examined in a Philips 300 electron microscope.


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.


Author(s):  
S.S. Spicer ◽  
B.A. Schulte

Generation of monoclonal antibodies (MAbs) against tissue antigens has yielded several (VC1.1, HNK- 1, L2, 4F4 and anti-leu 7) which recognize the unique sugar epitope, glucuronyl 3-sulfate (Glc A3- SO4). In the central nervous system, these MAbs have demonstrated Glc A3-SO4 at the surface of neurons in the cerebral cortex, the cerebellum, the retina and other widespread regions of the brain.Here we describe the distribution of Glc A3-SO4 in the peripheral nervous system as determined by immunostaining with a MAb (VC 1.1) developed against antigen in the cat visual cortex. Outside the central nervous system, immunoreactivity was observed only in peripheral terminals of selected sensory nerves conducting transduction signals for touch, hearing, balance and taste. On the glassy membrane of the sinus hair in murine nasal skin, just deep to the ringwurt, VC 1.1 delineated an intensely stained, plaque-like area (Fig. 1). This previously unrecognized structure of the nasal vibrissae presumably serves as a tactile end organ and to our knowledge is not demonstrable by means other than its selective immunopositivity with VC1.1 and its appearance as a densely fibrillar area in H&E stained sections.


Sign in / Sign up

Export Citation Format

Share Document