Amyloid Hypothesis of Alzheimer Disease

Alzheimer’s disease affects the brain as a result of a regenerative disorder. This then causes loss in memory, thinking and alteration in behavior patterns and is regarded as the largest cause of dementia cases. The patients who are suffering from this disease require the provision of services from resource rich health facilities (Pohanka, 2014). The most affected population is the elderly people although a small proportion of young people are also affected by Alzheimer’s disease. This paper therefore explores alzehaimers disease amyeloid hypothesis in respect to the progress towards the development of treatment options. The amyloid hypothesis argues that when the amyloid beta peptides occur in the brain tissues, they lead to the development of the Alzheimer’s disease. This peptide cause autosomal forms of mutations in three regions namely: presenelin 1, 2 and the amyeloid precursor proteins. The association between this disease and amyloid beta peptide was upon the examination of brain where plaques were found (Selkoe and Hardy, 2016). Therefore, the amyloid cascade provides an explanation to the process via which the Alzheimer’s disease occurs. These include the genetic causes via mutations, phenotypes and pathology as well as the risks involved. There have been therapeutic drugs produced to target this peptide so as to lower its levels of production. This is expected to cause a clearance in the amounts and levels of amyloid beta protein which in turn should reduce the aggregation of peptides to form plaques. However, it is not clear on the amount of the amyloid peptide which is found in the brain. Something that needs to be noted is that the amyloid beta peptides are the primary components of the neurotic plaques in the brain tissues of the patients who have Alzheimer’s disease. This is due to the fact that different parts of the brain can carry different amounts of the amyloid peptide and the Alzheimer’s disease is normally heterogeneous (Drachman, 2014). Another close association between this peptide and this disease is from the cloning of the gene which encodes beta amyloid precursor protein as well as its location in the chromosome number 21. Moreover, it has been found that Down’s syndrome leads to the neuropathology of Alzheimer’s disease. With time, the genetic mutations in the amyloids precursor protein have be found to be a key factor in the development of Alzheimer’s disease. Since the amyloid beta peptide has been found to be usual product of the metabolism in beta amyloid precursor protein in a person’s life, it can be meas ured by use of a culture medium, plasma and cerebrospinal fluid. This measures whether there are any abnormalities which result from the beta amyeloid precursor proteins (Morris et al., 2014). However, recently there have been objections raised against the amyloid hypothesis. One of the objections is that the number of amyloid deposits in the brain tissues does not correlate with the level of cognitive impairments that develops in a patient. In another way, the amyloid hypothesis brings objections since the neurotoxic effects of the amyloid peptide and the effects to the brain have not been studied in vivo. It is also evident that the soluble oligomers of amyloid peptide are responsible for the dysfunction in the brain as opposed the amyloid monomers in Alzheimer’s disease patients. These and many other objections support a reasoning that the neurodegeneration of the brain in Alzheimer’s disease is caused by the injury from some diffused oligomeric assemblage of misfolded proteins (Demetrius et al., 2015). As a result of this, the large polymeric aggregates make the inactive reservoirs which are equal to the neurotoxic assembly. On the other hand, the plaques in the brain do not necessarily indicate protection to the host. This is because the observation of these plaques in neurodegenerative diseases means that the reservoir of toxic proteins has occurred in the brain. Experiments involving transgenic mice in which the amyloid beta proteins were deposited in the brain did not indicate any loss in the cognitive abilities. This unexpected behavior by the transgenic mice could be due to differences in the species used, lack of human inflammation mediators and the short period of exposure of mice to the amyloid beta peptide. Since the Alzheimer’s disease is as a result of lack of balance between the deposition and the clearance of amyloid beta peptides, then there is a need to get treatment strategies for this disorder. One of the approaches would be the inhibition of either the beta or the gamma secretase enzymes which are crucial for the formation of beta amyloids and amyloid precursor proteins (Doody et al., 2014). For the beta secretase, there are some screening which is being done for a chemical compound to find out whether it can be able to bind on the active site of aspartyl protease and hence cross the blood brain barrier. For the gamma secretase, there are chemical compounds which have already been found but no clinical trials have been done on humans yet. However, it would be advisable to adopt more different treatment approached for the amyloid beta associated Alzheimer’s disease since the previously proposed strategies have some limitations (Karakaya et al., 2013). For instance a different approach that can be used would involve the use of immunization strategies. The most recommended immunization methods would involve the use of amyloid beta proteins in the cerebral so that they can lower the amounts of peptide clearance from the brain (Aisen and Vellas, 2013). A kind of different approach would involve the use of anti-inflammatory methods and drugs to aid in the clearance of the amyloid beta proteins in brain tissues. The use of the anti-inflammatory methods is recommendable because it has been found that as the amyloid proteins accumulate in brain tissues, the rate of inflammatory process increases. For a long period of time, the hypothesis concerning the association of amyloid beta proteins and the Alzheimer’s disease has been investigated. This calls for the development of therapeutic strategies based on the anti-amyloid beta peptides. In order to get treatment options for this disease. The treatment therapeutics needs to be closely based on the various characteristics that are observed in the amyloid peptides with respect to Alzheimer’s disease. By the adoption of various methods of treatment involving amyloid precursor protein gene cloning, the scientific world will find out whether there is an association between the amyloid beta protein hypothesis and the Alzheimer’s disease. Aisen, P.S. and Vellas, B., 2013. Passive immunotherapy for Alzheimer's disease: what have we learned, and where are we headed?. The journal of nutrition, health & aging, 17(1), p.49. Demetrius, L.A., Magistretti, P.J. and Pellerin, L., 2015. Alzheimer's disease: the amyloid hypothesis and the Inverse Warburg effect. Frontiers in physiology, 5, p.522. Doody, R.S., Thomas, R.G., Farlow, M., Iwatsubo, T., Vellas, B., Joffe, S., Kieburtz, K., Raman, R., Sun, X., Aisen, P.S. and Siemers, E., 2014. Phase 3 trials of solanezumab for mild-to-moderate Alzheimer's disease. New England Journal of Medicine, 370(4), pp.311-321. Drachman, D.A., 2014. The amyloid hypothesis, time to move on: Amyloid is the downstream result, not cause, of Alzheimer's disease. Alzheimer's & Dementia, 10(3), pp.372-380. Karakaya, T., Fußer, F., Schroder, J. and Pantel, J., 2013. Pharmacological treatment of mild cognitive impairment as a prodromal syndrome of Alzheimer's disease. Current neuropharmacology, 11(1), pp.102-108. Morris, G.P., Clark, I.A. and Vissel, B., 2014. Inconsistencies and controversies surrounding the amyloid hypothesis of Alzheimer's disease. Acta neuropathologica communications, 2(1), p.135. Pohanka, M., 2014. Alzheimer s disease and oxidative stress: a review. Current medicinal chemistry, 21(3), pp.356-364. Selkoe, D.J. and Hardy, J., 2016. The amyloid hypothesis of Alzheimer's disease at 25 years. EMBO molecular medicine, 8(6), pp.595-608.Trt

Summary Essay Example | Topics and Well Written Essays - 500 words - 73

Summary - Essay Example Serious and violent felonies are exclusively listed in state regulations. Violent offenses comprise of murder, burglary of a home in which a dangerous or deadly weapon is used, rape plus other sex offenses. Severe offenses comprise of the same offenses defined as violent offenses, but also take in other crimes such as burglary of a home and assault with an intention to commit a murder or robbery. This regulation also punishes habitual offenders (Walker 1). The law of imposing longer jail sentences for habitual offenders than first-time offenders who commit a similar crime. This is because Judges also take into consideration previous offenses before sentencing. Nevertheless, there is a more up to date history of mandatory prison sentences for habitual offenders. For instance, New York has a law, Persistent Felony Offender, which dates back to 19th century (Walker 2). Such sentences were, however, not obligatory in all cases, and judges had much more caution than before as to what term of imprisonment may be imposed. The three strikes law, however, works. Take a state like California for instance. Violent crimes, especially murder, have gone down in the Los Angeles area, plus other areas of the southland (Garvey 1). Homicide count in Los Angeles in the year 2010 was 297. This was less than a third of the 1992 homicides that were 1000 (Garvey 1). However, this might only be a correlation and not underlying, as violent crime has also gone down in other parts of California where the three strikes rule is not obligatory. It should also be renowned that punishments for murder are exceptionally harsh. Murder results in tremendously long sentences, life sentences without the likelihood of parole or even a death penalty (Garvey 1). Even though, it is a first conviction, murder still overshadows any curb effect of the three strikes law. Nevertheless, there is some proof that offenders on their last strike are more anxious to flee

SPSS-Analysis Assignment Example | Topics and Well Written Essays - 1000 words

SPSS-Analysis - Assignment Example This assignment describes the E-commerce topic that is a growing trend in the current business field. For this reasons, persons operating within the business industry should take a keen interest in the behaviors of consumers operating within the e-commerce business segment. To gain a better understanding, the researcher reviews previous literature on this subject and understands the various gaps and strengths that we can utilize to conduct future research. In this regard, this assignment discusses in detail two notable quantitative research analysis methods that have been employed in previous research and could potentially be useful for future studies in the area of e-commerce. The two research methods that we will be looking at are Partial least squares path modeling (PLS-SEM) and exploratory factor analysis (EFA). The first method, PLS-SEM, was utilized in the research article â€Å"Influences of gender and product type on online purchasing†. The second method EFA was utiliz ed in the research â€Å"Customer loyalty in e-commerce: an exploration of its antecedents and consequences†. After review the analysis and results of both articles, it is conclusive that the researchers were keen on the expected data analysis section of their chosen methods. An EFA analyses and their results are clear and easily understood by the audience. As for Pascual-Miguel, Agudo-Peregrina, and Chaparro-Pelà ¡ez , they had to modify a section of the data analyses for it to fit their collected data and the end results were satisfactory.

History of Maya Essay Example | Topics and Well Written Essays - 2750 words

History of Maya - Essay Example In the warm climate ÃŽ ¿f the Maya area, clothing as protection from the elements had never been a necessity. Maya clothing was used as decoration and the most spectacular clothes were for the priest. The Maya personages wore large ear plugs, necklaces, breastplates, ornaments attached to the nose, lips, waist, legs, arms, all were used for resplendent effect. Mayan peasants wore very little. The men had a simple loincloth or rather a band ÃŽ ¿f material that went once around their waist and then between their legs. Some at least possessed deerskin moccasins. The women had two garments a length ÃŽ ¿f decorated cloth with holes cut for head and arms, known as a kub. Man and women used a heavier square ÃŽ ¿f cloth known as a manta, which served as an overwrap on cold days, and as a night time blanket. The mantra was used as a curtain across the doorway. Cotton and sisal were cultivated on a considerable scale, and weaving was one ÃŽ ¿f the main occupations ÃŽ ¿f Mayan women. Authorities think that cotton was reserved for nobility and priests. While the dress ÃŽ ¿f the peasants was simple, that ÃŽ ¿f the nobility was much more colorful and elaborates. Although their clothing was sparse, the Maya were fond ÃŽ ¿f personal adornment. The ordinary people wore ornaments ÃŽ ¿f bone, shell, wood, and stone in their ears, noses, and lips. For people in the higher rank, the decorations were ÃŽ ¿f metal or jade. They also filed their teeth into points and sometimes covered them with plates ÃŽ ¿f what were to them precious stones. ... The Maya personages wore large earplugs, necklaces, breastplates, ornaments attached to the nose, lips, waist, legs, arms, all were used for resplendent effect (Brainerd 68). Mayan peasants wore very little. The men had a simple loincloth or rather a band f material that went once around their waist and then between their legs. Some at least possessed deerskin moccasins. The women had two garments a length f decorated cloth with holes cut for head and arms, known as a kub. Man and women used a heavier square f cloth known as a manta, which served as an overwrap on cold days, and as a night time blanket. The manta was used as a curtain across the doorway. Cotton and sisal were cultivated on a considerable scale, and weaving was one f the main occupations f Mayan women. Authorities think that cotton was reserved for nobility and priests. While the dress f the peasants was simple, that f the nobility was much more colorful and elaborates (Whitlock 43). Although their clothing was sparse, the Maya were fond f personal adornment. The ordinary people wore ornaments f bone, shell, wood and stone in their ears, noses and lips. For people in the higher rank, the decorations were f metal or jade. They also filed their teeth into points and sometimes covered them with plates f what were to them precious stones, such as obsidian, iron pyrites and most valuable f all jade. Paint was used lavishly on their bodies, and was applied by means f pottery shards dipped in the paint pot. The colors f the paints had significance. The Maya also practiced tattooing (Whitlock 44). Mayan villagers were overall well organized. The families had a certain distribution f land. Probably, each f the habitants

Final phil Essay Example | Topics and Well Written Essays - 1500 words

Final phil - Essay Example A little history of Hinduism has it that Hinduism and Buddhism were originated in South Asia. The history of Hindu has far more than that of Hinduism. It was used by Persian conquerors, since the middle of the first millennium BCE; refer to the indigenous populations living in the surroundings of the river flowing along the north- western frontiers of the Indian subcontinent, Sindhu. The prophet Gautama Buddha, who was the prince of the kingdom Kapilavatthu named Siddhartha, at the Himalayan Foothills, around 490 BCE, who was to become Gautama Buddha after his renunciation, founded Buddhism. Hinduism also means the emergence of Vedas, in which the Upanishads were composed between the 7th and 3rd century and also it became a part of the Vedas. Buddhism was emerged as a part of Shramana movements, around the 5th century.â€Å"Hinduism has the belief of monotheistic (one God) as well as polytheistic (many Gods) elements: the one Supreme Being (Brahman) also exists simultaneously in the deities of the Creator (Brahma), the Reality or Sustainer (Vishnu) and the Destroyer (Shiva)† (Hinduism par.6). According to the Buddhism philosophy, there is no god which does not believe in the concept of god. â€Å"In fact, often those who scorn others, claiming some unconvincing excuse, are unable to look the target of their ridicule directly in the eye, perhaps because they see their ownselves there† (Ikeda & Nanda p.9). The reincarnation and ultimate salvation was taught by Buddhism and rejected Vedas of Hinduism. An important principle of Hinduism is the Law of Karma. It is important to note that Buddhism has the doctrines, which were written in Pali –a canon text. Yoga is one of the important disciplines of Hinduism. Through Yoga, one can get a controlled body and mind. In Buddhism, they have the concept for salvation which is depended on oneself and not to others. Traditional worship of God is known as pooja in Hindu. There will be a pooja room in every Hindu’s house. However, it is important to note that the doctrine of Hinduism is not a fixed uniform, on contrary it is inclusive, broad and further its tolerant to many points of view (Chapter 19: Asian Thought p.411). Buddhism was found not only in India, but also in other countries like Sri Lanka (Ceylon), Myanmar (Burma), China, Korea, Thailand, Tibet and Japan. They also rejected the caste system which is in Hinduism. Moreover, Buddhism has a founder in Gautama Buddha, while Hinduism does not have any founder of its own. It was originated as a civilisation in the surroundings of River Sindhu. There are the four noble truths in Buddhism.â€Å"The doctrine of the Four Noble Truths then focuses on the relationship between suffering and attachment or desire† (Chapter 19: Asian Thought p.412). The Buddhist strongly rejects the doctrine of rebirth and karma, followed by the Buddhist doctrine of eight-hold path. Hinduism allows complete freedom to individual. It is extr emely liberal and catholic. And, also Sanskrit has got importance in this religion. Hindus have the belief that there are two stages of life. They are: Vanaprastha and Sannyasa, - man withdraws himself from all worldly activities, retires into the forest and prepares himself for taking Sannyasa. This is the life of a Vanaprastha sanyasa after vanaprasta and he leads a meditation life. Dharma, Reincarnation, and Karma are the basic tenets of Buddhism. The law

Training at MRM Recruitment Consultants Essay Example | Topics and Well Written Essays - 3500 words

Training at MRM Recruitment Consultants - Essay Example However, now what is required is finding new ways of filing and storing data, of processing it and making informed decisions based on it. Electronic data management largely facilitates all this. Â  Organizations that turn to EDM have to strategically plan for it, especially the training needs of the staff, as the systems may be efficient, but it’s the employees who’ll be operating them. It’s important to chart out the training needs, tools, and scope, while always keeping the organization culture1 in mind so that the staff is slowly inducted into the new technology. (Clarke, S. 2001). Â  Taking the case of a recruitment organization, The MRM Recruitment Consultants3, the scope of EDM can be studied, and a program for value-addition to the existing chain of processes identified. All this has to be complemented by using a strategic approach to the training of the employees so that when the firm is ready to switch over to the electronic mode, the personnel is well adjusted and enthusiastic. Â  This paper makes a case of the potential use of EDM in a small firm and tries to elaborate how electronic management of data can result in quicker and efficient operations, and hence will bring prosperity to the business even if some initial investments are to be made. Â  Since times immemorial, businesses have been striving to better manage their processes, to become more efficient, and to reach out more to their customers. The latter part of the last century saw a many-fold increase in the data and information generated during the course of business. Managing information sources, so as to make deliberate and rational decisions, is now a matter of competition. Today, only those businesses survive who are able to manage data on their products, markets, and customers, better than their competitors. Â  

Fiscal Policy and Economic Growth Essay Example | Topics and Well Written Essays - 1250 words

Fiscal Policy and Economic Growth - Essay Example As the essay stresses countries exposed to large capital flows must avoid intermediate regimes. It is also necessary to adopt a corner regime. According to these proponents, corner regimes sustainable regimes for long run. It has been found that SEA countries also shifted from an intermediate regime to intermediate regime. A vast literature has been dedicated to found out the preferred choice of exchange rate regime. The fundamentals identified by the OCA approach has given some guidance for observed regime choices. In 1980s, studies were focused on the role of shocks on the choice of regimes. This research incorporates considerations for macroeconomic stabilization. According to the report findings the real shocks allow flexibility and symmetry of shocks produces OCA. Shocks have been appeared in countries which have weak financial institutions. The counties with weak financial institutions intervene in the market in order to shield banking industries which are confronting large exchange rate movements. There are many authors who agree SEA countries should adopt a currency basket system in order to gain and maintain exchange rate stability and flexibility. As far as the macroeconomics situations of SEA countries are concerned, the most reasonable choice is managed floating regime. It is because managed floating regime is fewer complexes than currency basket system agree that managed floating regime would be less complex than the currency basket ... In 1980s, studies were focused on the role of shocks on the choice of regimes. This research incorporates considerations for macroeconomic stabilization. Authors have argued that nominal shocks actually raise the possibility of a fixed regime. The real shocks allow flexibility and symmetry of shocks produces OCA. Shocks have been appeared in countries which have weak financial institutions. The counties with weak financial institutions intervene in the market in order to shield banking industries which are confronting large exchange rate movements. There are many authors who agree SEA countries should adopt a currency basket system in order to gain and maintain exchange rate stability and flexibility. As far as the macroeconomics situations of SEA countries are concerned, the most reasonable choice is managed floating regime. It is because managed floating regime is fewer complexes than currency basket system agree that managed floating regime would be less complex than the currency basket (Hossain, M. 2011). Financial liberalization index Figure 1 A cross-country index indicating financial liberalization has been used to identify the development in the sector. It ranges between 0 and 18 (Abiad, 2005). This index is made during the period or 1973 to 1995 (Figure 1 and 2). First figure studies three initial countries i.e. Indonesia, Korea and Malaysia. For the last three years FLI is assumed to be constant. These both graphs indicate the exchange rate regime in six countries. The figure indicates that till 1977 all three countries were focusing on fixed regime but due changing conditions in 1979 Indonesia and Korea shifted to intermediate regime. While Malaysia remained consistent to fixed regime. 1993 onwards all three