1.Effects of Oxidative Stress in Follicular Environment on Embryo Quality in Women of Different Ages
Can-xin WEN ; Rui-qi LI ; Song-bang OU ; Dong-zi YANG ; Yu LI
Journal of Sun Yat-sen University(Medical Sciences) 2020;41(3):465-472
【Objective】 To investigate the oxidative stress status in follicular fluid and granulosa cells obtained during oocyte retrieval cycles among women of different ages and to explore the relationship between the oxidative stress and the embryo quality. 【Methods】 From September 8, 2018 to January 18, 2019 in our reproductive center, 70 follicular fluid samples on the day of oocyte retrieval were collected from infertile women undergoing in vitro fertilization(IVF) or intracytoplasmic sperm injection(ICSI). We divided the samples into those at or above(aged group, n = 34) and below the age of 35(young group, n = 36) and compared seven oxidative stress markers in follicular fluid and gene expression of antioxidant enzymes in granulosa cells, and then analyzed their differences between groups and their relationship with embryo development parameters. 【Results】 We observed significantly higher concentration of hydrogen peroxide(H
2.Prokaryotic expression of a recombinant protein of adeno-associated virus capsid conserved regions and preparation of its polyclonal antibody.
Shu Yue LI ; Chun Yu CAO ; Hao ZHANG ; Yu Ling LI ; Xiong Zhou ZHANG ; Zi Can YANG ; Yan XIA ; Lei WANG ; Ya Feng LÜ
Journal of Southern Medical University 2022;42(6):944-948
OBJECTIVE:
To express and purify the antigenic peptide of adeno-associated virus (AAV) capsid conserved regions in prokaryotic cells and prepare its rabbit polyclonal antibody.
METHODS:
The DNA sequence encoding the conserved regions of AAV capsid protein was synthesized and cloned into the vector pET30a to obtain the plasmid pET30a-AAV-CR for prokaryotic expression and purification of the conserved peptides. Coomassie blue staining and Western blotting were used to identify the AAV conserved peptides. Japanese big ear white rabbits were immunized with AAV conserved region protein to prepare polyclonal antibody, with the rabbits injected with PBS as the control group. The antibody titer was determined with ELISA, and the performance of the antibody for recognizing capsid protein sequences of AAV1-AAV10 was assessed with Western blotting and immunofluorescence assay.
RESULTS:
The plasmid pET30a-AAV-CR was successfully constructed, and a recombinant protein with a relative molecular mass of 17000 was obtained. The purified protein induced the production of antibodies against the conserved regions of AAV capsid in rabbits, and the titer of the purified antibodies reached 1:320 000. The antibodies were capable of recognizing a wide range of capsid protein sequences of AAV1-AAV10.
CONCLUSION
We successfully obtained the polyclonal antibodies against AAV capsid conserved region protein from rabbits, which facilitate future studies of AAV vector development and the biological functions of AAV.
Animals
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Antibodies
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Capsid
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Capsid Proteins/genetics*
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Dependovirus/genetics*
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Prokaryotic Cells
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Rabbits
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Recombinant Proteins/genetics*