✅The severity of COVID-19 disease, especially in the elderly and patients with comorbidities, is characterized by hypercytokinemia, an exaggerated immune response associated with an uncontrolled and excessive release of pro-inflammatory cytokine mediators (cytokine storm).
1. The immunomodulatory capacity of flavonoids, carried out by the regulation of inflammatory mediators, the inhibition of endothelial activation, the NLRP3 inflammasome, the toll-like receptors (TLR)
2. Or the bromodomain-containing protein 4 (BRD4), and the activation erythroid-derived nuclear factor 2 (Nrf2), could be beneficial in regulating cytokine storm during SARS-CoV-2 infection.
3. Furthermore, the ability of flavonoids to inhibit ladipeptidyl peptidase 4 (DPP4), neutralize 3-chymotrypsin-like proteases (3CLpro) or affect the intestinal microbiota to maintain the immune response.
sciencedirect.com/science/articl…
4. The molecular docking of SARS-CoV-2S and fisetin🍓👇
@DrLBoominathan
researchgate.net/figure/The-mol…
5. Cellular senescence (SnCs) often develop a senescence-associated secretory phenotype (SASP). This can include proinflammatory; proapoptotic cytokines (TNF-α, IL1 α IL-6); chemokines that attract, activate, and anchor immune cells (IP-10, MCP's) ;
6. Tissue-destroying proteases (MMP-3, 9, or 12); prothrombotic factors (PAI-1); factors that impair stem cell/progenitor function and cause fibrosis (Activin-A, TGF-β-related proteins); and ferritin. In addition to proteins and peptides, the SASP can include bioactive lipids
7. (bradykinins, ceramides, PG), tissue damaging, proinflammatory, noncoding nucleotides (including micro-RNAs, mitochondrial DNA), exosomes, and other factors that contribute to tissue necrosis, fibrosis, systemic inflammation, immune dysfunction, and spread of senescence.
8. Neuroprotective👉fisetin🍎dosage (20 mg/kg, i.p for 2 weeks; 1 week prior to LPS and 1 week co-treated with LPS) markedly reduced oxidative stress, systemic inflammation, neurodegeneration, and synaptic and memory dysfunction induced by LPS
mdpi.com/2077-0383/8/6/…
Fisetin🍇abrogates the D-galactose-induced oxidative stress and neuroinflammation by regulating the inflammatory mediators and markers related to the vital process of autophagy
nmn.com/news/is-fiseti…

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More from @GrimaldesJ

7 Sep
Epidemiological studies show that older adults are the most affected by this pandemic, which makes chronological age a risk factor in SC2

Senescence👉stable growth arrest induced👉 cells reach the end of their replication potential or are exposed to various stressors👉infection.
pubmed.ncbi.nlm.nih.gov/18692159/

Main molecular pro-inflammatory pathways involved in aging and age-related diseases👇 Image
The role of inflammation in pathophysiological process and the possible action of CR and exercise👇 Image
Read 44 tweets
26 Jul
#Immunometabolism
PART 1

The general course of events during infections (Sars-CoV2) leading to "cytokine storm" can look like this:

1. Cells undergo damage, senescence, or become infected with a virus.
⬇️
2. Those cells release damage-associated molecular patterns (DAMPs) or pathogen-associated molecular patterns (PAMPs), which activate receptors in the immune system.
⬇️
3. DAMPs, like HBGM1, signal the production of the inflammatory response.
⬇️
4. HBGM1 binds to TLR2 / TLR4 / RAGE receptors to begin mobilizing pro-inflammatory cytokines.
⬇️
5. Activation of the NF-kB / NLRP3 inflammasomes ensues.
⬇️
6. Release of pro-inflammatory cytokines IL-1, IL-6, IL-1B, IL-18, IL-17, IL-22, and others occurs.
⬇️
Read 17 tweets
20 Feb
# Mechanistic therapy on Notch-3 signaling, N-acetyl-cysteine ​​prophylaxis and treatment in pulmonary fibrosis (# sequelacovid19) and other complications. #Immunometabolic
Proteins of the Notch family are cell surface receptors that TRANSDUCE SIGNALS BETWEEN NEIGHBORING CELLS. The Notch signaling pathway is evolutionarily highly conserved, including many aspects of vascular development.
The interaction of Notch receptors with ligands leads to the cleavage of the Notch intracellular domain (NICD) which then translocates to the nucleus and activates the transcription factor CBF1 / JBP-Jkappa, regulating downstream gene expression.
Read 15 tweets

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