Cell, animal neural-type cells

Nerve cells do not divide, and cut interconnections between nerve cells in the CNS are not able to regenerate, which leads to dysfunctions after brain or spinal cord injuries. This makes it also difficult to utilize these cells in technical devices because no cell lines can be established. This means that only primary cell cultures, that is, cells that come directly from a living animal, can be used. There are some neuron-hke cell lines in which hybridoma cells between a type of cancer cells and a neural cell are used. Cancer cells divide easily and hence cell lines can be established. However, these hybridoma cell lines do not easily form synaptic junctions. Because without synapses there... 

The symptoms of vitamin E deficiency in animals are numerous and vary from species to species (13). Although the deficiency of the vitamin can affect different tissue types such as reproductive, gastrointestinal, vascular, neural, hepatic, and optic in a variety of species such as pigs, rats, mice, dogs, cats, chickens, turkeys, monkeys, and sheep, it is generally found that necrotizing myopathy is relatively common to most species. In humans, vitamin E deficiency can result from poor fat absorption in adults and children. Infants, especially those with low birth weights, typically have a vitamin E deficiency which can easily be corrected by supplements. This deficiency can lead to symptoms such as hemolytic anemia, reduction in red blood cell lifetimes, retinopathy, and neuromuscular disorders. 

The second family of secreted proteins that is covalently lipidated is the family of Wnt proteins. They are also involved in numerous processes like proliferation of stem cells, specification of the neural crest, and the expanding of specific cell types. The correct regulation of this pathway is important for animal development. Willert and coworkers were the first to isolate an active Wnt molecule. Mass spectroscopy studies carried out with the isolated protein revealed that cysteine 93 is palmitoylated. Mutating this amino acid to alanine led to almost complete loss of the signaling activity. Later in 2006, a second lipidation was found on a serine in Wnt3a. " In this case, the hydroxyl side chain is acylated with palmitoleic acid. This unsaturated fatty acid seems to be crucial for the progression of the protein through the secretory pathway. The attachment of two different lipid chains may therefore serve different functions. ... 

Histamine H3 receptors are well distributed in peripheral tissues, although relatively less abundant than in the CNS. As for the cellular localization, peripheral H3 receptors are present in different cell types, like the neural, paracrine, endocrine, muscular and endothelial cells, where they subserve a predominant inhibitory role. However, the multiple location of H3 receptors in the same tissue may lead to opposite effects on the physiologic function, thus, their role can sometimes be quite difficult to understand. As regards a possible clinical application of H3 ligands, although many suggestions have been derived from the experimental animal data (e.g. gastric disorders, asthma, myocardial ischemia, hypertension and inflammation), to date, no clinical evidence is available for any therapeutic indication. 

It is well established that toxic nephropathies are not restricted to a single type of renal injury. Some chemicals target one discrete anatomical region of the kidney and may affect only one cell type. Chemical insult to the kidney may result in a spectrum of nephropathies that are indistinguishable from those that do not have a chemical etiology. Nephrotoxicity and neural disorders in animals and humans have occurred due to prolonged exposure to chemical substances. These may be broadly categorized as ... 

Fenvalerate has low toxicity in mammals due to its rapid metabolic breakdown. It acts directly on nerve axons by prolonging sodium channel opening in cell membranes. Insects exposed to fenvalerate are quickly paralyzed exposure causes quick insect knockdown. In small animals, type II pyrethroids cause salivation, chewing, burrowing, choreoathetosis, and seizures. They also cause lower action potential amplitude, marked membrane depolarization, and eventual total neural activity blockade. Fenvalerate is likely to act both on peripheral and central nervous system. It is also a potent inhibitor of calcineurin (protein phosphatase 2B). 

As reviewed here, cannabinoids may lead to opposite effects on the cell sur-vival/death decision. For example, in the case of neural cells, cannabinoids may kill tumour cells and protect their non-transformed counterparts from death (Guzman 2003) (Fig. 1). It is conceivable that different experimental factors may account for this yin-yang action, for example (1) cannabinoid neuroprotection is usually more evident in whole-animal than in cultured-neuron models, which may result from their aforementioned impact on various brain cell types (neurons, astroglia, oligodendroglia, microglia, vascular endothelium) (2) cannabinoids may exert... 

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