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     The image is immunohistochemistry of paraffin-embedded Human cervical cancer tissue using P04879(FLG Antibody) at dilution 1/20. (Original magnification: ×200)    

  
  

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     The image is immunohistochemistry of paraffin-embedded Human liver cancer tissue using P04879(FLG Antibody) at dilution 1/20. (Original magnification: ×200)    

  
  

Filaggrin (FLG) antibodies are essential tools in studying the role of filaggrin, a key protein in epidermal differentiation and skin barrier function. Filaggrin is encoded by the FLG gene and synthesized as a large precursor protein, profilaggrin, which is stored in keratohyalin granules within the stratum granulosum of the epidermis. During terminal differentiation, profilaggrin is cleaved into functional filaggrin monomers that aggregate keratin filaments, facilitating the collapse of corneocytes into a flattened, protective stratum corneum. Subsequently, filaggrin undergoes further degradation into hygroscopic amino acids that contribute to skin hydration and pH regulation.

Mutations in the FLG gene are strongly associated with impaired skin barrier integrity, leading to disorders like ichthyosis vulgaris and atopic dermatitis (eczema). FLG antibodies are widely used in immunohistochemistry, immunofluorescence, and Western blotting to detect filaggrin expression levels, localization, and processing defects in research and clinical diagnostics. These antibodies help elucidate pathogenic mechanisms in genetic skin diseases and assess therapeutic interventions targeting barrier repair. Additionally, FLG autoantibodies have been investigated in autoimmune conditions, though their clinical relevance remains less defined. Overall, FLG antibodies are pivotal in advancing understanding of epidermal biology and related pathologies.