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Unbalanced human embryos secrete more hyperglycosylated human chorionic gonadotrophin (hCG-H) than balanced ones. | LitMetric

AI Article Synopsis

  • This study aimed to compare the levels of hyperglycosylated human chorionic gonadotropin (hCG-H) released from balanced vs. unbalanced human embryos during cultivation after intracytoplasmic sperm injection (ICSI).* -
  • Out of 155 analyzed embryos, 36% were classified as balanced and 64% as unbalanced; results showed that unbalanced embryos secreted significantly higher hCG-H levels in their culture media.* -
  • The findings suggest that while increased hCG-H secretion is linked to chromosomal abnormalities in embryos, using hCG-H alone as a biomarker isn’t reliable for accurately identifying balanced embryos.*

Article Abstract

Purpose: The aim of this study was to compare the levels of hyperglycosylated human chorionic gonadotropin (hCG-H) secreted from balanced and unbalanced human embryos.

Methods: Single-step culture media samples from 155 good quality embryos, derived from 90 good prognosis patients undergoing intracytoplasmic sperm injection (ICSI), were collected on the fifth day of embryo cultivation. All embryos were tested by next-generation sequencing (NGS) technique. The hCG-H levels in the culture media were evaluated by ELISA kit (Cusabio Biotech, CBS-E15803h) according to the manufacturer's instructions. Statistical analysis was performed using SPSS v.21 (IBM Corp., Armonk, NY, USA).

Results: The NGS analysis revealed that 36% of the embryos (n = 56) were balanced, and 64% of the embryos were unbalanced (n = 99). The presence of hCG-H was confirmed in all embryo culture media samples but was absent in the negative control. In addition, hCG-H concentration was significantly higher in the culture media from unbalanced embryos compared with the balanced ones (0.72 ± 0.30 mIU/ml vs. 0.62 ± 0.12 mIU/ml, p = 0.02, respectively). Furthermore, the mean levels of hCG-H were significantly increased in the samples from embryos with multiple abnormalities. Finally, the highest levels of hCG-H were expressed from embryos with monosomy of chromosome 11 (1.28 ± 0.04 mIU/ml) and those with trisomies of chromosomes 21 (2.23 mIU/ml) and 4 (1.02 ± 0.35 mIU/ml).

Conclusion: Our results suggest that chromosomal aberrations in human embryos are associated with an increased secretion of hCG-H. However, hCG-H concentration in embryo culture media as a single biomarker is not sufficient for an accurate selection of balanced embryos.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7311563PMC
http://dx.doi.org/10.1007/s10815-020-01776-9DOI Listing

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