Identification and Standardization of a Method That Would Allow the Study of the Metabolic Profile of Blastocoele Lays the Foundation to Assess Blastocyst Metabolomic Profile and Its Relation With Embryo Morphology and Embryo Implantation
- Conditions
- Blastocoele Fluid
- Registration Number
- NCT01427413
- Lead Sponsor
- Cervesi Hospital, Cattolica, Italy
- Brief Summary
While the number of assisted reproduction cycles increases worldwide, the introduction of actual technological improvements in the ability to quickly and non-invasively identify the best embryos for transfer still represents a critical goal for reproductive medicine. Indeed, embryo assessment is currently performed through the analysis of morphology and cleavage rate. Recent studies have sought to identify a correlation between qualitative-quantitative profiles of small molecules of metabolic interest and the outcome of embryo transfer. Some of these molecules seem to be best suited for this purpose, including glucose, lactate, pyruvate or amino acid levels. Approaches relying on both optical and non-optical spectroscopy have been proposed to non-invasively monitor the embryo culture media. However, the non-invasive approach only offers an indirect strategy to monitor embryos and a turn-around solution to bypass the limits of detection of these analytical techniques. In this paper the investigators pave the way for direct assessment of embryos through the mass spectrometry-based analysis of blastocoele fluid, which is withdrawn from the blastocoele cavity prior to cryostorage of blastocysts. The investigators show how it is possible to detect most of the already documented metabolites of interest right at the very heart of the blastocyst, without disrupting the workflow of a classic laboratory pipeline.
- Detailed Description
Not available
Recruitment & Eligibility
- Status
- UNKNOWN
- Sex
- Female
- Target Recruitment
- 100
- Ovarian hyperstimulation disease
- Blastocyst formation
Not provided
Study & Design
- Study Type
- OBSERVATIONAL
- Study Design
- Not specified
- Primary Outcome Measures
Name Time Method standardize the method of aspiration 2 months The method for blastocyst micropuncturing and aspiration of blastocoel fluid is according also to the last literature about blastocyst vitrification. In brief, expanded day 5 blastocysts were removed from culture and transferred to a 30 nl droplet of pre-warmed Hepes buffer.
An injection pipette was introduced avoiding contaminations through the trophectoderm, and blastocoel fluid was aspirated until the blastocyst had fully collapsed around the pipette. The retrieved fluids were expelled into new purified water drops and frozen at -80°C alongside 0.5 nl control droplets of purified water.metabolite detection 6 months metabolite detection through rapid resolution reversed phase (RR-RP) high performance liquid chromatography (HPLC)-mass spectrometry (MS). From sample volumes as low as 0.5 nl we could detect and quantify against external standards a group of metabolites, whose roles in blastocyst development and embryo metabolism have long been postulated. The list included i) ATP adenosine triphosphate ; ii) glucose-6-phosphate; iii) lactate; iv) NAD+ nicotinamide-adenine dinucleotide+ and v) NADH and vi) NADPH nicotinamide-adenine dinucleotide phosphate; vii) 6-phosphogluconic acid; viii) glutamic acid and ix) α-ketoglutarate.
- Secondary Outcome Measures
Name Time Method analysis of the correlation between blastocyst morphology and metabolic profile in the blastocoele fluid 1 year blastocyst classify according to morphological criteria in the book "Atlas of Human Blastocyst" by L. Veeck and associate, to each morphological class a characteristic metabolic profile, in order to scientifically validate the observational and objective criteria up to now used in our lab
Trial Locations
- Locations (1)
Cervesi Hospital
🇮🇹Cattolica, Rimini, Italy