PPIH抗体—艾普蒂

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     The image is immunohistochemistry of paraffin-embedded Human thyroid cancer tissue using P10274(PPIH Antibody) at dilution 1/60. (Original magnification: ×200)    

  
  

PPIH (Peptidyl-Prolyl cis-trans Isomerase H) is a member of the cyclophilin family of proteins, which function as molecular chaperones facilitating protein folding and conformational regulation. Initially identified as a component of the spliceosome, PPIH plays a critical role in pre-mRNA splicing by interacting with the U2 small nuclear ribonucleoprotein (snRNP) complex. It exhibits peptidyl-prolyl isomerase activity, catalyzing the cis-trans isomerization of proline residues—a rate-limiting step in protein folding. This activity is essential for maintaining the structural dynamics of spliceosomal components during assembly and catalysis.

PPIH antibodies are valuable tools for studying spliceosome biology, RNA processing, and protein folding mechanisms. They are widely used in techniques like Western blotting, immunoprecipitation, and immunofluorescence to detect PPIH expression, localization, and interaction partners. Dysregulation of PPIH has been implicated in cancer and neurodegenerative diseases, where aberrant splicing or protein misfolding contributes to pathogenesis. For instance, elevated PPIH levels are observed in certain malignancies, suggesting its potential as a biomarker or therapeutic target.

Research using PPIH antibodies has also clarified its role in stress responses, as cyclophilins are involved in cellular adaptation to environmental challenges. These antibodies help elucidate how PPIH modulates signaling pathways, including those linked to apoptosis and inflammation. Ongoing studies aim to explore its interplay with other spliceosomal proteins and its impact on gene expression networks, advancing our understanding of both normal physiology and disease mechanisms.