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Microbes & Immunity Big data and DNN-based DTI model in CHP

through the APC/C, indirectly regulates the activity of In summary, the CCL2 and CCL20 are chemokines
separase, which cleaves cohesin complexes like those that are regulated by target genes IL17, IL22, IL2, and IL12.
containing the gene STAG3. The ubiquitination of the They orchestrate the recruitment and activation of various
Securin protein, along with CDC23 overexpression in inflammatory cell populations, which contribute to the
CHP, provides a molecular basis through which gender development of granulomatous lesions, tertiary lymphoid
differences in CDC23 expression may lead to differences structures, and fibrotic remodeling. Targeting specific
in CHP. members of this chemokine family or their receptors may
represent a promising therapeutic strategy for attenuating
3.4. The role of the cytokine chemokine (C-C motif) the aberrant inflammatory and fibrotic processes
ligand/chemokine (C-C motif) receptor chemokine underlying CHP symptoms.
family in the pathogenesis of CHP
3.4.1. The role of cytokine chemokine (C-C motif)
According to Figure 4, our multi-omics analysis has ligand 2 in the pathogenesis of CHP
unveiled the pivotal role of the CCL chemokine family
in orchestrating the complex inflammatory cascade and Chemokine (C-C motif) ligand 2, also known as monocyte
disease symptoms in CHP. Several members of the CCL/ chemoattractant protein-1, has emerged as a crucial
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CCR family, such as CCL2, CCL20, CCR2, and CCR6, were mediator in the pathogenesis of CHP. In Figure 4, our
found to be significantly upregulated in the lung tissue multi-omics analysis revealed a significant upregulation
samples of CHP patients. These chemokines express of CCL2 expression in lung tissue samples from CHP
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various immune cell populations, including monocytes, patients compared to healthy controls. CCL2 is a potent
macrophages, lymphocytes, and granulocytes. The chemoattractant for monocytes, memory T cells, and
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increased expression of these chemokines in CHP plays immature dendritic cells, exerting its effects by binding to
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a pivotal role in the recruitment and activation of these its cognate receptor, CCR2. The increased production of
inflammatory cells, leading to their accumulation within CCL2 in CHP promotes the recruitment of these CCR2-
the pulmonary interstitium. The chemokine ligand CCL2 expressing immune cells to the pulmonary interstitium,
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is also known as monocyte chemoattractant protein-1. perpetuating the inflammatory cascade. On recruitment
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Elevated levels of CCL2 in CHP promote the recruitment to the lung parenchyma, monocytes differentiate into
of CCR2-expressing monocytes and macrophages to inflammatory macrophages, which play a pivotal role in the
the site of inflammation. These cells, once activated, initiation and propagation of the inflammatory response
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release a myriad of pro-inflammatory cytokines, ROS, in CHP. CCL2 can influence the tumor microenvironment
and proteolytic enzymes, contributing to the perpetuation by recruiting immune cells that may either support or
of the inflammatory response and tissue injury. CCL2 inhibit tumor growth. The interaction between mutated
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also contributes to the activation and proliferation of adenomatous polyposis coli (APC) and increased levels of
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fibroblasts, a key event in the fibrotic remodeling process CCL2 can contribute to a pro-tumorigenic environment.
+
observed in CHP. In addition, CCL2 has been shown to Subsequently, APCs present processed antigens to CD4
promote the migration and proliferation of lung fibroblasts, T-cells, initiating the adaptive immune response. The
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contributing to the development of pulmonary fibrosis. 59 interaction between the T-cell receptors on CD4 T-cells
and the antigen-major histocompatibility complex II
Importantly, the analysis of our core signaling pathway complex on APCs is critical for T-cell activation. Moreover,
in Figure 4 reveals a complex interplay between the CCL some CD4 T-cells express CCR2 and can respond to
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chemokine signaling pathways and other key regulatory CCL2, which is often produced at sites of inflammation.
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cascades implicated in CHP pathogenesis, such as the This allows CD4 T-cells to migrate to areas where
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MAPK and PI3K/AKT pathways. This crosstalk creates a they are needed to provide help to other immune cells.
self-sustaining inflammatory loop, wherein the activation Furthermore, Th1 cells are essential for defending against
of these pathways upregulates the expression of CCL intracellular pathogens and are involved in promoting
chemokines, which, in turn, potentiate the activation of inflammation. They originate from naive CD4 T-cells.
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the cytokine genes IL17, IL22, IL2, and IL12, perpetuating Cytokines and other signals present in the immune
the inflammatory and fibrotic responses. Furthermore, environment guide the differentiation into Th1 cells. As a
elevated levels of specific CCL chemokines or their subset of CD4 T-cells, Th1 cells have specialized functions
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receptors have been proposed as potential diagnostic that focus on cell-mediated immunity and the activation
and prognostic biomarkers for CHP, aiding in the early of macrophages. They are distinct from other CD4 T-cell
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detection and monitoring of disease symptoms, as well as subsets like Th2, which are more involved in humoral
guiding therapeutic interventions. 70 immunity and allergic responses. 74

Volume 2 Issue 2 (2025) 97 doi: 10.36922/mi.4620