Company: CERO
Filing Date: 2025-05-27
Form Type: POS AM
Source: 0001213900-25-047469
Chunk: 153

Company: CERO THERAPEUTICS HOLDINGS, INC.
Filing Date: 2025-05-27
Form: POS AM
Chunk 153
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 the human immune system is segregated into two separate yet interconnected components, the innate immune system and the adaptive immune system. The innate immune system is responsible for an immediate, non-specific response to infected or diseased cells. Triggering its activation are pathogen-associated and damage-associated molecular patterns recognized by preconfigured pattern recognition receptors which reside on the surface of various types of leukocytes, or white blood cells, that make up the innate immune system, including macrophages, dendritic cells, eosinophils and natural killer (“NK”) cells. In addition to its direct participation in eliminating damaged or diseased cells, certain components of the innate immune system function significantly as antigen-presenting cells (“APCs”) promoting the activity of the adaptive immune system. The adaptive immune system is composed of special types of leukocytes known as T and B lymphocytes, also known as T and B cells, respectively. T cells participate primarily in the cell-mediated immune response while B cells are involved in the humoral immune response. T cells are an essential component of the adaptive immune system, targeting specific antigens and either destroying targeted cells directly or participating in their destruction by activating other immune cells. T cells use T cell specific receptors to recognize antigens presented via major histocompatibility complex (“MHC”) molecules on APCs. Through this mechanism, T cells have the ability to target tumor-transformed or virus infected cells, as well as help coordinate the activity of other immune cells. T cells are differentiated by the expression of protein markers on their surface. The two most prominent types of T cells are those that express CD8 molecules and are known as CD8 T cells, and those that express CD4 molecules and are known as CD4 T cells. CD8 T cells, also referred to as cytotoxic lymphocytes (“CTLs”), eliminate cells which they encounter that are recognized as being infected with viruses or other pathogens or are otherwise damaged or dysfunctional through a process referred to as cell lysis, which involves the release by these killer T cells of perforins and granzymes to compromise the integrity of the target cell’s membrane. Endogenous pathogens are broken down by mechanisms present in virtually all cells into smaller fragments and presented to CD8 T cells in combination with an MHC Class I molecule. CD4 T cells, also referred to as T helper cells, have limited cytotoxic activity and typically do not kill infected or dysfunctional cells or eliminate pathogens directly. Instead, they participate in the immune response by providing signals which activate and orchestrate other types of immune cells to perform these