Computational Molecular Biology 2025, Vol.15, No.5, 254-264 http://bioscipublisher.com/index.php/cmb 256 stability in such an environment. All these seemingly independent changes are actually interrelated, forming a mutually pulling network that jointly drives the disease forward (Kodam et al., 2023). This is also why understanding the interactions between these cells and pathways is particularly crucial. Only by clarifying these relationships can we more accurately identify the regulatory nodes that truly affect the course of AD. Figure 1 AD subtype comparisons on MRI and clinical outcomes (Adopted from Tijms et al., 2024) Image caption: a, Median hippocampal volume as the percentage of total intracranial volume (TIV) compared to subtypes in the dementia stage. b, Choroid plexus volume as the percentage of TIV compared to subtypes in the dementia stage. c, Cortical atrophy associated with AD subtypes in the dementia stage compared to controls (n = 160). β indicates mean cortical thickness in mm, averaged over the right and left hemispheres and adjusted for age and sex. d, Clinical progression from MCI to dementia according to subtype (left; excluding subtype 3 due to n = 2) and time from dementia to death according to subtypes (right) (Adopted from Tijms et al., 2024) 3 Principles of Computational Network Reconstruction When studying diseases like Alzheimer's disease (AD) that involve numerous molecular changes, looking at a single gene or pathway is often insufficient. Therefore, it is necessary to understand these molecular relationships within a "network". The purpose of computational reconstruction is to express these seemingly scattered biological components and their connections, and then use various algorithms to infer the hidden regulatory structures within them. However, the network is not necessarily the more complex the better. How to be rich in details while preventing the model from being distorted due to overfitting is an unavoidable issue for such methods. Therefore, both data integration and network reasoning need to follow certain principles (Peixoto, 2025).
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