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Hu KL, Zheng X, Hunt S, Li X, Zhang D, Li R, Ben M. P–772 Blastocyst quality and perinatal outcomes in women undergoing single blastocyst transfer in frozen cycles. Hum Reprod 2021. [DOI: 10.1093/humrep/deab130.771] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Study question
Is the morphological grading systems of a blastocyst associated with perinatal outcomes in women undergoing frozen-thawed single blastocyst transfer (SBT)?
Summary answer
Preferential transfer of a blastocyst based on their morphological grading systems appears to be supported by observed differences in perinatal outcomes.
What is known already
The transfer of a morphologically good quality blastocyst is associated with higher implantation and pregnancy rates as compared with a poor quality blastocyst. However to date, the association of the morphologic parameters of the blastocyst (developmental stage, inner cell mass (ICM), and trophectoderm (TE)) with the perinatal outcomes after blastocyst transfer remains unknown.
Study design, size, duration
A retrospective cohort study including 21,648 frozen-thawed SBT cycles from January 2013 to March 2019.
Participants/materials, setting, methods
6037 women with singleton delivery in Peking University Third Hospital were eligible for analysis. Multivariate logistic regression was used to test the risk of factors with the expression of crude odds ratios (OR) and adjusted OR (aOR) with 95% confidence intervals (CI).
Main results and the role of chance
Transfer of a blastocyst with grading lower than 3BB was associated with a higher chance of female baby (49% vs 43%, aOR = 1.27 (1.12, 1.43)) and a higher rate of cesarian section (C-section) (69% vs 65%, aOR = 1.17 (1.03, 1.34)). Compared with stage 4 blastocyst, transfer of a stage 3 blastocyst was associated with a higher chance of preterm delivery (PTD) (aOR = 1.77 (1.08, 2.90)). Both stage 3 and stage 6 blastocyst transfer was associated with a lower chance of female baby (aOR = 0.68 (0.48, 0.97), 0.66 (0.47, 0.93), respectively). Compared with grade A ICM blastocyst transfer, Grade B ICM and grade C ICM blastocyst transfer was associated with a lower chance of a female baby (adjusted OR = 0.84 (0.73, 0.96), 0.63 (0.48, 0.83), respectively) and a higher risk of large for gestational age (LGA) (aOR = 1.20 (1.01, 1.42), 1.46 (1.07, 1.98), respectively). Grade C ICM blastocyst transfer was associated with an increased risk of macrosomia (aOR = 1.66 (1.14, 2.42)).Grade B TE and grade C TE blastocyst transfer had a lower risk of gestational diabetes mellitus (GDM) (aOR = 0.76 (0.60, 0.98), 0.69 (0.50, 0.94), respectively) than grade A TE blastocyst transfer.
Limitations, reasons for caution
The main limitations of this study were its retrospective nature and the relative subjectivity of blastocyst scoring. The follow-up was conducted through a phone call and some patients might not report their obstetrical and neonatal outcomes, leading to a relatively lower rate of several obstetrical outcomes.
Wider implications of the findings: Transfer of a poor quality blastocyst is associated with a higher rate of C-section. The association between ICM grading and LGA and macrosomia would suggest that blastocysts with grade A ICM grading should be transferred preferentially and supports the use of current morphological grading systems for embryo prioritisation.
Trial registration number
N/A
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Affiliation(s)
- K L Hu
- Peking University Third Hospital, Center for Reproductive Medicine- Department of Obstetrics and Gynecology, Beijing, China
- Zhejiang University School of Medicine, Department of Reproductive Endocrinology, Hangzhou, China
| | - X Zheng
- Peking University Third Hospital, Center for Reproductive Medicine- Department of Obstetrics and Gynecology, Beijing, China
| | - S Hunt
- Monash University, Department of Obstetrics and Gynaecology, Clayton, Australia
| | - X Li
- West China Second University Hospital of Sichuan University, Centre for Reproductive Medicine, Chengdu, China
| | - D Zhang
- Zhejiang University School of Medicine, Department of Reproductive Endocrinology, Hangzhou, China
| | - R Li
- Peking University Third Hospital, Center for Reproductive Medicine- Department of Obstetrics and Gynecology, Beijing, China
| | - M Ben
- Monash University, Department of Obstetrics and Gynaecology, Clayton, Australia
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Chen J, Tang JN, Hu KL, Zhao YY, Tang C. The production characteristics of volatile organic compounds and their relation to growth status of Staphylococcus aureus in milk environment. J Dairy Sci 2018; 101:4983-4991. [PMID: 29550124 DOI: 10.3168/jds.2017-13629] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2017] [Accepted: 12/02/2017] [Indexed: 01/22/2023]
Abstract
In our previous research, 3-methyl-butanal and 3-methyl-butanoic acid were identified as representative and specific volatile organic compounds released by Staphylococcus aureus in broth. In this study, we explored the production of the 2 volatiles and their correlation to Staph. aureus growth in milk under different conditions. We found significant correlations between the production of 3-methyl-butanoic acid and cell counts of 5 Staph. aureus strains in sterile milk, and there were no obvious differences for its production among 5 tested strains. The intensities of the 2 volatiles were similar and positively correlated with bacterial counts in cultures at 25°C and 37°C despite delayed production of volatiles at 25°C; however, neither compound could be detected at 4°C. The production of 3-methyl-butanoic acid was strongly correlated with growth of Staph. aureus mixed with Streptococcus agalactiae, Escherichia coli O157:H7, and Shigella flexneri, whereas correlations for 3-methyl-butanal were not statistically significant. Compared with the monoculture of Staph. aureus, in mixed cultures, production of 3-methyl-butanal was decreased and that of 3-methyl-butanoic acid was comparatively higher. In pasteurized and raw milks, production of 3-methyl-butanoic acid was correlated with growth of Staph. aureus, and 3-methyl-butanoic acid could be detected when Staph. aureus populations reached 106 to 107 cfu/mL in pasteurized milk and 105 to 106 cfu/mL in raw milk; the correlations for 3-methyl-butanal were not statistically significant. Our results suggest that 3-methyl-butanoic acid is a more suitable marker for high counts of Staph. aureus in milk, whereas 3-methyl-butanal is a transient metabolite and easily depressed by environmental factors.
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Affiliation(s)
- J Chen
- College of Life Science and Technology, Southwest University for Nationalities (Southwest Minzu University), Chengdu, China, 610041
| | - J N Tang
- College of Life Science and Technology, Southwest University for Nationalities (Southwest Minzu University), Chengdu, China, 610041.
| | - K L Hu
- College of Life Science and Technology, Southwest University for Nationalities (Southwest Minzu University), Chengdu, China, 610041
| | - Y Y Zhao
- College of Life Science and Technology, Southwest University for Nationalities (Southwest Minzu University), Chengdu, China, 610041
| | - C Tang
- College of Life Science and Technology, Southwest University for Nationalities (Southwest Minzu University), Chengdu, China, 610041
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Dovey HF, John V, Anderson JP, Chen LZ, de Saint Andrieu P, Fang LY, Freedman SB, Folmer B, Goldbach E, Holsztynska EJ, Hu KL, Johnson-Wood KL, Kennedy SL, Kholodenko D, Knops JE, Latimer LH, Lee M, Liao Z, Lieberburg IM, Motter RN, Mutter LC, Nietz J, Quinn KP, Sacchi KL, Seubert PA, Shopp GM, Thorsett ED, Tung JS, Wu J, Yang S, Yin CT, Schenk DB, May PC, Altstiel LD, Bender MH, Boggs LN, Britton TC, Clemens JC, Czilli DL, Dieckman-McGinty DK, Droste JJ, Fuson KS, Gitter BD, Hyslop PA, Johnstone EM, Li WY, Little SP, Mabry TE, Miller FD, Audia JE. Functional gamma-secretase inhibitors reduce beta-amyloid peptide levels in brain. J Neurochem 2001; 76:173-81. [PMID: 11145990 DOI: 10.1046/j.1471-4159.2001.00012.x] [Citation(s) in RCA: 711] [Impact Index Per Article: 30.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Converging lines of evidence implicate the beta-amyloid peptide (Ass) as causative in Alzheimer's disease. We describe a novel class of compounds that reduce A beta production by functionally inhibiting gamma-secretase, the activity responsible for the carboxy-terminal cleavage required for A beta production. These molecules are active in both 293 HEK cells and neuronal cultures, and exert their effect upon A beta production without affecting protein secretion, most notably in the secreted forms of the amyloid precursor protein (APP). Oral administration of one of these compounds, N-[N-(3,5-difluorophenacetyl)-L-alanyl]-S-phenylglycine t-butyl ester, to mice transgenic for human APP(V717F) reduces brain levels of Ass in a dose-dependent manner within 3 h. These studies represent the first demonstration of a reduction of brain A beta in vivo. Development of such novel functional gamma-secretase inhibitors will enable a clinical examination of the A beta hypothesis that Ass peptide drives the neuropathology observed in Alzheimer's disease.
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Affiliation(s)
- H F Dovey
- Elan Pharmaceuticals, Inc., South San Francisco, CA 94080, USA
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Chen X, Fang YX, Xiong WS, Su Z, Hu KL, Wu WJ, Liu ZQ. Comparative effects of captopril, nitroprusside, dopamine and lanatoside C on a new model of rabbit congestive heart failure. Zhongguo Yao Li Xue Bao 1988; 9:402-8. [PMID: 3064549] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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