/* */ Rosa Rubicondior: Malevolent Designer News - Leaving Nothing To Chance With Alzheimer's Disease

Wednesday, 15 September 2021

Malevolent Designer News - Leaving Nothing To Chance With Alzheimer's Disease

Plasma and brain concentrations of apo B and Aβ.
(A) In vivo PET detection of amyloid binding was used to confirm cerebral amyloid deposition in HSHA mice and their age-matched WT controls. Representative PET and MRI fusion images (coregistered with MRI templates using conventional Fast Spin Echo Sequence T2-weighted sequence) show scan data at 20 to 40 minutes’ post-intravenous administration of [11C] PiB. Each panel (from left to right) illustrates maximum binding potential for [11C] PiB represented by coronal images at −2, 0, 4, and 6 mm from the bregma; indicated by the vertical bar. Plasma (B) and brain (C) levels of apo B, a surrogate marker of TRLs in HSHA and WT control mice, were determined with ELISA. Data are expressed as mean ± SEM. Human and mouse isoforms of Aβ in plasma (D) and brain (E, F) were measured separately with ELISA kits using antibodies specific to each isoform. The data underlying Fig 2B–2F can be found in S1 Data. Aβ, amyloid beta; apo B, apolipoprotein B; HSHA, hepatocyte-specific human amyloid; MRI, magnetic resonance imaging; PET, positron emission tomography; PiB, Pittsburgh compound; TRL, triglyceride-rich lipoprotein; WT, wild-type.
Synthesis of human amyloid restricted to liver results in an Alzheimer disease–like neurodegenerative phenotype

According to Creationists, everything about biology and human anatomy and physiology especially, is definitely not the result of natural, evolutionary forces and the operation of random chance. Instead, it is all designed by their reputedly omnipotent, omniscient god who knew exactly what it was designing and designed if for the particular purpose which it serves - which means it is responsible for both the good and the bad in its 'designs', of course.

So, playing at Intelligent [sic] Design advocates for a moment, we have in this scientific paper an example of the sheer mendacious nastiness of Creationism's divine malevolence. It shows how, just to make sure it's victims get Alzheimer's disease in later life, it has designed a mechanism in the liver that manufactures one of the proteins which has been implicated in the progress of this ghastly disease which robs the sufferer of their dignity, their memory, their personality and eventually their life.

The study, published open access in PLOS Biology, was carried out by John Mamo of Curtin University in Bentley, Australia, and colleagues.

According to the press release from PLOS:
Deposits of amyloid-beta (A-beta) in the brain are one of the pathological hallmarks of AD and are implicated in neurodegeneration in both human patients and animal models of the disease. But A-beta is also present in periphereral organs, and blood levels of A-beta correlate with cerebral amyloid burden and cognitive decline, raising the possibility that peripherally produced a-beta may contribute to the disease. Testing that hypothesis has been difficult, since the brain also produces A-beta, and distinguishing protein from the two sources is challenging.

In the current study, the authors surmounted that challenge by developing a mouse that produces human a-beta only in liver cells. They showed that the protein was carried in the blood by triglyceride-rich lipoproteins, just as it is in humans, and passed from the periphery into the brain. They found that mice developed neurodegeneration and brain atrophy, which was accompanied by neurovascular inflammation and dysfunction of cerebral capillaries, both commonly observed with Alzheimer's disease. Affected mice performed poorly on a learning test that depends on function of the hippocampus, the brain structure that is essential for the formation of new memories.

The findings from this study indicate that peripherally derived A-beta has the ability to cause neurodegeneration and suggest that A-beta made in the liver is a potential contributor to human disease. If that contribution is significant, the findings may have major implications for understanding Alzheimer's disease. To date, most models of the disease have focused on brain overproduction of A-beta, which mimics the rare genetic cases of human Alzheimer's. But for the vast majority of AD cases, overproduction of A-beta in the brain is not thought to be central to the disease etiology. Instead, lifestyle factors may play a more important role, including a high-fat diet, which might accelerate liver production of A-beta.
The team's paper can be read here:
Abstract

Several lines of study suggest that peripheral metabolism of amyloid beta (Aß) is associated with risk for Alzheimer disease (AD). In blood, greater than 90% of Aß is complexed as an apolipoprotein, raising the possibility of a lipoprotein-mediated axis for AD risk. In this study, we report that genetic modification of C57BL/6J mice engineered to synthesise human Aß only in liver (hepatocyte-specific human amyloid (HSHA) strain) has marked neurodegeneration concomitant with capillary dysfunction, parenchymal extravasation of lipoprotein-Aß, and neurovascular inflammation. Moreover, the HSHA mice showed impaired performance in the passive avoidance test, suggesting impairment in hippocampal-dependent learning. Transmission electron microscopy shows marked neurovascular disruption in HSHA mice. This study provides causal evidence of a lipoprotein-Aß /capillary axis for onset and progression of a neurodegenerative process.

It looks very likely then that the protein amyloid-β, produced by the liver, may be the trigger to the development of Alzheimer's Disease. Which leaves intelligent [sic] design Creationists with the task of explaining why a god who designed that mechanism, knowing exactly what it would do, is worthy of worship.

No doubt though, just as with the SARS-CoV-2 virus and COVID-19, Creationists would rather we believed their divine malevolence is a sadistic monster who enjoys watching its creation suffer, than accept that a better explanation for these things is an amoral, purposeless process such as evolution by natural selection, genetic drift, etc. They would much rather be regarded as the unworthy product of dirt, than the result of a 3.8-billion-year process of selection for survival; the descendants of survivors who never once failed the fitness test and a process by which they are connected to every other life form on the planet. For some reason, the latter doesn't seem to make them feel important enough.

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