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Application of human histone h3 Ser10 and Ser28 in identification of human oocyte maturation stage

A human oocyte, h3ser10 technology, applied in the field of human assisted reproduction, can solve the problems of different phosphorylation patterns and no report on the phosphorylation state of histone H3, and achieve the effect of improving accuracy

Active Publication Date: 2020-05-15
THE FIRST AFFILIATED HOSPITAL OF ZHENGZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] From existing reports, it can be seen that the phosphorylation of histone H3 is representative during oocyte maturation, however, the phosphorylation pattern is not the same between different species, especially for the same species (mouse). Differing findings, in particular the state of histone H3 phosphorylation during human oocyte maturation has not yet been reported

Method used

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  • Application of human histone h3 Ser10 and Ser28 in identification of human oocyte maturation stage
  • Application of human histone h3 Ser10 and Ser28 in identification of human oocyte maturation stage
  • Application of human histone h3 Ser10 and Ser28 in identification of human oocyte maturation stage

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Experimental program
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Embodiment 1

[0032] Embodiment 1, material and method

[0033] 1. Research object

[0034] The subjects of this study were patients who underwent IVF treatment in the Reproductive Center of the First Affiliated Hospital of Zhengzhou University. Inclusion criteria: 1. Age ≤ 35 years old; 2. Follicle stimulating hormone (FSH) < 12mIU / L; 3. The row stimulation program is a long program or an ultra-long program. All patients had signed the "Informed Consent Form", and the study was approved by the Medical Ethics Committee of Zhengzhou University.

[0035] 2. Obtaining oocytes

[0036] The collected oocytes were immature oocytes during intracytoplasmic sperm injection (ICSI). Conventionally, oocytes are retrieved 36 hours after injection of human chorionic gonadotropin (Hcg), and intracytoplasmic sperm injection is performed 4-6 hours after oocyte retrieval. At this time, only oocytes that have grown to the metaphase of the second meiosis are considered mature oocytes and can be injected. ...

Embodiment 2

[0054] Example 2, Localization of H3Ser10 and H3Ser28 Phosphorylation in Human Oocytes

[0055] A total of 104 oocytes were collected, including 28 at the GV stage, 26 at the MI stage, 24 at the ATI stage, and 26 at the MII stage. Immunofluorescence staining analysis of cloned antibodies and monoclonal antibodies against histone H3 phosphorylation at serine 28.

[0056] Such as figure 1 As shown, the results of immunofluorescence analysis of monoclonal antibody against histone H3 serine phosphorylation at position 10 showed that phosphorylation of H3 Ser10 was always present during oocyte maturation (see figure 1 Column H3 / Ser10-P in ), and start in GV stage oocytes, and co-localize with DNA, and have been distributed on chromosomes.

[0057] Such as figure 2 As shown, the results of immunofluorescence analysis of anti-histone H3 phosphorylation serine 28 monoclonal antibody showed that during oocyte maturation, the phosphorylation signal of H3Ser28 was not found in the GV...

Embodiment 3

[0058] Example 3, Localization of phosphorylation of H3Ser10 and H3Ser28 in 3PN early embryos derived from IVF

[0059] A total of 85 3PN zygotes were collected and divided equally into H3Ser10 and H3Ser28 groups. Immunofluorescence staining analysis was performed with anti-histone H3 serine 10 phosphorylated monoclonal antibody and anti-histone H3 serine 28 phosphorylated monoclonal antibody respectively.

[0060] The result is as image 3Shown: Immunofluorescence staining revealed that in human 3PN fertilized eggs, the localization of H3Ser10 and H3Ser28 phosphorylation was different. H3Ser10 phosphorylation mainly appeared in the male pronucleus at the 3PN prokaryotic stage, and was evenly distributed at the 1-cell stage with further development. on the chromosome. For H3Ser28, there was no phosphorylation signal at the 3PN prokaryotic stage, but with the further development of the embryo, it could be seen that it was located on the chromosome at the 1-cell stage.

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Abstract

The present invention relates to novel application of a product for detection of phosphorylation status of human histone H3 Ser10 and Ser28. The phosphorylation status of the human histone H3 Ser10 can be used for identification or assistant identification of the number of male pronucleus in human embryos, the period development of the human embryos and the growth period of human oocytes, or screening of the human embryos or human zygotes; the phosphorylation status of the H3Ser28 can be used for identification or assistant identification of the period development of the human embryos and thegrowth period of the human oocytes, or screening of the human embryos or the human zygotes.

Description

technical field [0001] The invention relates to the technical field of human assisted reproduction, and in particular to the application of human histone H3 Ser10 (the 10th serine) and Ser28 (the 28th serine) in identifying the maturation stage of human oocytes. Background technique [0002] Epigenetics is a branch of genetics, which is the study of gene expression changes that can be passed on to the next generation under the premise of non-DNA sequence changes. Its research areas include DNA methylation, post translational modifications (PTMs), genomic imprinting, RNA editing, gene silencing, maternal effects ( maternal effects) and activation of dormant transposons, etc. Epigenetics is not only related to the maintenance of normal cell proliferation and apoptosis, but also closely related to embryonic development and malignant transformation of cells. Precise and complex changes in epigenetic modifications are required at each step in the growth of germ cells and embryo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/577G01N33/68
CPCG01N33/577G01N33/6842
Inventor 陈磊马宁赵
Owner THE FIRST AFFILIATED HOSPITAL OF ZHENGZHOU UNIV
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