What is pathophysiology of Alzheimer?

['Obi kel párti li']

Kuzê ki é patofisiolojia di duénsa di Alzheimer?

Fisiopatolojia di duénsa di Alzheimer (AD) é un prusésu konplexu ki ta nvolve akumulason di proteinas anormal, inflamason, y disfunson neuronal.

Kes dôs kuza prinsipal ki ta mostra ma algen ten Alzheimer é pélis di beta-amiloide (Aβ) i konfuzon neurofibril (NFT) na sérebro.

Es ta forma kuzas sima plakas di beta-amiloide óras ki enzimas ta kebra- s.

Kes péptidi ta djunta pa forma fibrilha insolúvel ki ta fika fóra di neuron, ta perturba kumunikason entri sel i ta mata neuron.

Es ta pensa ma akumulason di plaka di Aβ é un di kes primeru kuza ki ta kontise óras ki algen ta ten Alzheimer.

Tanki neuroniku ta forma óras ki proteína tau fika hiperfosforiladu i ta forma filamentus anormal déntu di neuron.

Kes kuza li ta prujudika funson normal di kes mikrotubu, ki é inportanti pa transporta nutrienti i otus kuza déntu di neuron.

Kes neuron ki fika txeu trapadjadu ta móre.

Inflamason tanbê ten un papel na patofisiolojia di duénsa di Alzheimer.

Sistema imunológico ta rispondi akumulason di plaka di Aβ y NFTs ku libertason di citocinas pró-inflamatórias, ki podi agrava danus na neurons.

Tanbê, ten provas ki ta mostra ma strésu oksidativu, disfunson mitokondrial, y abuzu di metabolismu di glikóza ta kontribui pa patofisiolojia di AD.

Kes kuza li pode poi kes neuron ta funsiona mariadu i ti móre, ta pô-s ta fika más duenti.

Na tudu, patofisiolojia di duénsa di Alzheimer é un konplikason di txeu fator ki ta poi algen ta perde ténpu i ta perde kapasidadi di pensa.

['Referénsia']

PubMed/Medline https://www.nlm.nih.gov/databases/download/pubmed_medline.html

RefinedWeb https://arxiv.org/abs/2306.01116

Nemeroff CB: The preeminent role of neuropeptide systems in the early pathophysiology of Alzheimer disease: up with corticotropin-releasing factor, down with acetylcholine. Arch Gen Psychiatry. 1999, 56 (11): 991-2.

Skoog I, Kalaria RN, Breteler MM: Vascular factors and Alzheimer disease. Alzheimer Dis Assoc Disord. , 13 Suppl 3 (): S106-14.

Proft J, Weiss N: Jekyll and Hide: The two faces of amyloid β. Commun Integr Biol. 2012, 5 (5): 405-7.

Whitehouse PJ, Hedreen JC, White CL, Price DL: Basal forebrain neurons in the dementia of Parkinson disease. Ann Neurol. 1983, 13 (3): 243-8.

Casadesus G, Moreira PI, Nunomura A, Siedlak SL, Bligh-Glover W, Balraj E, Petot G, Smith MA, Perry G: Indices of metabolic dysfunction and oxidative stress. Neurochem Res. , 32 (4-5): 717-22.

Candore G, Bulati M, Caruso C, Castiglia L, Colonna-Romano G, Di Bona D, Duro G, Lio D, Matranga D, Pellicanò M, Rizzo C, Scapagnini G, Vasto S: Inflammation, cytokines, immune response, apolipoprotein E, cholesterol, and oxidative stress in Alzheimer disease: therapeutic implications. Rejuvenation Res. , 13 (2-3): 301-13.

Raskind MA, Peskind ER: Neurobiologic bases of noncognitive behavioral problems in Alzheimer disease. Alzheimer Dis Assoc Disord. 1994, 8 Suppl 3 (): 54-60.

Schindler SE, McConathy J, Ances BM, Diamond MI: Advances in diagnostic testing for Alzheimer disease. Mo Med. , 110 (5): 401-5.

Singh VK: Immune-activation model in Alzheimer disease. Mol Chem Neuropathol. , 28 (1-3): 105-11.

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['i (6) un asinatura fíziku ô iletróniku di kel algen ki é donu di direitus di autor ô di un algen ki sta autorizadu pa aji na se nómi.']

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What is pathophysiology of alzheimer?

The pathophysiology of Alzheimer's disease (AD) is a complex process that involves the accumulation of abnormal proteins, inflammation, and neuronal dysfunction.

The two main hallmarks of AD are the presence of amyloid-beta (Aβ) plaques and neurofibrillary tangles (NFTs) in the brain.

Amyloid-beta plaques are formed when fragments of the amyloid precursor protein (APP) are cleaved by enzymes to form Aβ peptides.

These peptides aggregate and form insoluble fibrils that accumulate outside neurons, disrupting cell-to-cell communication and leading to neuronal death.

The accumulation of Aβ plaques is thought to be one of the earliest events in the development of AD, and it is believed to contribute to the neurodegenerative process.

Neurofibrillary tangles are formed when the protein tau becomes hyperphosphorylated and forms abnormal filaments inside neurons.

These tangles disrupt the normal functioning of the microtubules, which are essential for the transport of nutrients and other materials within the neuron.

The tangles eventually lead to the death of the affected neurons.

Inflammation also plays a role in the pathophysiology of AD.

The immune system responds to the accumulation of Aβ plaques and NFTs by releasing pro-inflammatory cytokines, which can exacerbate the damage to neurons.

Additionally, there is evidence that oxidative stress, mitochondrial dysfunction, and impaired glucose metabolism contribute to the pathophysiology of AD.

These factors can lead to neuronal dysfunction and death, further exacerbating the disease process.

Overall, the pathophysiology of AD is a complex interplay of multiple factors that ultimately lead to the progressive decline in cognitive function and memory loss that characterizes the disease.

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