Browsing by Author "Yadav, Megha"

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    Anisotropic short-range attractions precisely model branched erythrocyte aggregates
    (Royal Society of Chemistry, 2023-10-17T00:00:00) Yadav, Megha; Vanshika, None; Singh, Chamkor
    Homogeneous suspensions of red blood cells (RBCs or erythrocytes) in blood plasma are unstable in the absence of driving forces and form elongated stacks, called rouleaux. These erythrocyte aggregates are often branched porous networks - a feature that existing red blood cell aggregation models and simulations fail to predict exactly. Here we establish that alignment-dependent attractive forces in a system of dimers can precisely generate branched structures similar to RBC aggregates observed under a microscope. Our simulations consistently predict that the growth rate of typical mean rouleau size remains sub-linear - a hallmark from past studies - which we also confirm by deriving a reaction kernel taking into account appropriate collision cross-section, approach velocities, and an area-dependent sticking probability. The system exhibits unique features such as the existence of percolated and/or single giant cluster states, multiple coexisting mass-size scalings, and transition to a branched phase upon fine-tuning of model parameters. Upon decreasing the depletion thickness we find that the percolation threshold increases but the morphology of the structures opens up towards an increased degree of branching. Remarkably the system self-organizes to produce a universal power-law size distribution scaling irrespective of the model parameters. � 2023 The Royal Society of Chemistry.
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    An Insight to Heat Shock Protein 90: A Remedy for Multiple Problems
    (Bentham Science Publishers, 2022-08-30T00:00:00) Yadav, Megha; Singh, Ankit Kumar; Kumar, Adarsh; Thareja, Suresh; Kumar, Pradeep
    Heat shock protein 90 (Hsp90) is a chaperone protein that prevents many other proteins from aggre-gating by folding them in a certain way. Hsp90 consists of three structural domains: N-terminal, middle and C-terminal domains. Hsp90 has many activities in numerous proteins and signaling pathways like chimeric fusion proteins, steroid hormone receptors, tumor suppressor genes, and cell cycle regulatory proteins. The role of Hsp90 is not only in cancer but also in other diseases like COVID-19, leishmaniasis, diabetes, flavi virus, systemic sclerosis, grass carp reovirus, psoriasis, malaria, cardiac fibrosis, and alcohol-related liver diseases. This review is a compilation of the pharmacological profile of Hsp90 inhibitors, problems associated with them, and suggested remedies for the same. � 2022 Bentham Science Publishers.