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Identification of New Proteins in Follicular Fluid from Mature Human Follicles by Direct Sample Rehydration Method of Two-Dimensional Polyacrylamide Gel Electrophoresis

Lee, Han-Chul    (Functional Genomics Lab, CHA Research Institute, Bundang Campus, College of Medicine, Pochon CHA University, Sungnam, Korea.   ); Lee, Sang-Wha    (Genome Research Center for Reproductive Medicine and Infertility, CHA General Hospital, Seoul, Korea.   ); Lee, Kyo Won    (Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea.   ); Lee, Sook-Whan    (Genome Research Center for Reproductive Medicine and Infertility, CHA General Hospital, Seoul, Korea.   ); Cha, Kwang-Yul    (Genome Research Center for Reproductive Medicine and Infertility, CHA General Hospital, Seoul, Korea.   ); Kim, Kye Hyun    (Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea.   ); Lee, Suman    (Functional Genomics Lab, CHA Research Institute, Bundang Campus, College of Medicine, Pochon CHA University, Sungnam, Korea.  );
  • 초록

    Human follicular fluid (HFF) includes various biologically active proteins which can affect follicle growth and oocyte fertilization. Thus far, these proteins from mature follicles in human follicular fluid have been poorly characterized. Here, two-dimensional polyacrylamide gel electrophoresis (2-DE) with matrix-assisted laser desorption/ionization-mass spectrometry (MALDI-MS) was used to identify new proteins in HFF. Mature follicular fluids were obtained from five females after oocyte collection during in vitro fertilization (IVF). We directly rehydrated HFF samples, obtained high-resolution 2-DE maps, and processed them for 2-DE and MALDI-MS. One hundred eighty spots were detected and 10 of these spots were identified. By the 2-DE database, six of them had been reported, as proteins already existing in HFF. Hormone sensitive lipase (HSL), Unnamed protein product 1 (UPP1), Unnamed protein product 2 (UPP2), and apolipoprotein A-IV precursor were newly detected. HSL and apolipoprotein A-IV participate in lipid metabolism. UPP1 has a homology with selenocysteine lyase. We found by RT-PCR that these genes are expressed from human primary granulosa cells. The proteins identified here may emerge as potential candidates for specific functions during folliculogenesis, hormone secretion regulation, or oocyte maturation. Further functional analysis of these proteins is necessitated to determine their biological implications.


  • 주제어

    Follicular Fluid .   Electrophoresis, Gel, Two-Dimensional .   Granulosa Cells.  

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