Key Takeaways & Executive Findings
- •• Haploid embryonic stem cells (haESCs) combine the advantages of haploidy and pluripotency, enabling efficient genetic screening and drug-targeted therapy. • The establishment of haESCs in various species, from medaka fish to mammals, has overcome the challenge of haploid cell culture and opened new avenues for genetic research. • HaESCs serve as powerful tools for studying X chromosome inactivation, haploid diploidization, and gamete substitution, with potential applications in reproductive medicine. • The review highlights the historical milestones and future directions in haESC research, emphasizing their significance in life sciences and clinical translation.
Abstract
Haploid cells are a kind of cells with only one set of chromosomes. Compared with traditional diploid cells, haploid cells have unique advantages in gene screening and drug-targeted therapy, due to their phenotype being equal to the genotype. Embryonic stem cells are a kind of cells with strong differentiation potential that can differentiate into various types of cells under specific conditions in vitro. Therefore, haploid embryonic stem cells have the characteristics of both haploid cells and embryonic stem cells, which makes them have significant advantages in many aspects, such as reproductive developmental mechanism research, genetic screening, and drug-targeted therapy. Consequently, establishing haploid embryonic stem cell lines is of great significance. This paper reviews the progress of haploid embryonic stem cell research and briefly discusses the applications of haploid embryonic stem cells.
1. Introduction
The genetic material of most organisms in nature, including humans, contains two sets of chromosomes, one from the mother and the other from the father, called diploid organisms. Diploidy has many advantages, such as effectively preventing the elimination of organisms due to recessive deleterious mutations and maintaining the relative stability of genetics and the biosphere [1, 2]. It also increases genetic diversity through interspecific hybridization, which promotes biological evolution and the creation of new species. However, for gene research, diploidy is a great obstacle, due to the fact the phenotype of recessive genes is difficult to be reflected in heterozygotes. Therefore, for haploid cells, the characteristic that their genotypes are equal to their phenotypes gives them a unique advantage in gene research and drug screening (Fig. 1).
In the natural state, only the gametes with highly specialized structures and functions are haploid cells in mammals [3, 4]. However, oocytes and sperm cannot generally be cultured and amplified for long periods in vitro, so it is difficult to manipulate them genetically. Therefore, successfully establishing mammalian haploid stem cell lines in vitro is significant in promoting mammalian genetics, development, evolution, and other related life science research.
Loading authentic research manuscript (Pages 1–5)...
Hai-Song Wang, Xin-Rui Ma, Yi-Hong Guo (2026). Development and application of haploid embryonic stem cells. Stem Cell Research & Therapy. https://doi.org/10.1186/s13287-024-03727-y
Research & Educational Purpose Only:The translations, structured abstracts, analytical annotations, and data reports provided by SinoBioData are intended exclusively for academic research, internal corporate R&D, and educational benchmarking. They do not constitute formal engineering, chemical safety, legal, or professional advice.
Copyright & Intellectual Property Notice: Original copyright of the underlying source articles and experimental data remains with the respective authors, institutions, and original publishing journals. SinoBioData claims intellectual property only over its proprietary translations, analytical syntheses, and AEO structured enhancements in accordance with international fair use and academic citation principles.
Frequently Asked Questions
What are haploid embryonic stem cells (haESCs)?
Haploid embryonic stem cells are cells that contain only one set of chromosomes and possess the pluripotent differentiation potential of embryonic stem cells. They combine the advantages of haploidy (genotype equals phenotype) and pluripotency, making them valuable for genetic screening and drug-targeted therapy.
Why are haploid cells advantageous for genetic research?
In haploid cells, the phenotype directly reflects the genotype, allowing recessive mutations to be easily identified. This simplifies genetic screening and functional studies, as a single copy of a gene is sufficient to observe its effect.
How were haploid embryonic stem cells first established?
The first haploid embryonic stem cell lines were established in medaka fish in 2009, followed by mouse haESCs in 2011. These breakthroughs demonstrated that haploid cells could be cultured in vitro and maintained their differentiation capacity.
What are the potential applications of haESCs?
HaESCs have applications in reproductive developmental research, genetic screening, drug-targeted therapy, and studying X chromosome inactivation and haploid diploidization. They also offer potential for gamete substitution and semi-cloning.
What challenges remain in haESC research?
Challenges include maintaining haploid stability during long-term culture, improving the efficiency of haESC derivation, and translating findings to clinical applications. Future research aims to overcome these hurdles and expand the use of haESCs.
Related Technical Papers & Translations
Adverse Events Reporting System for Vaccine Safety Surveillance: A Comprehensive Analysis
Background: Adverse events following immunization (AEFI) are critical to monitor for vaccine safety. This study evaluates the performance of an adverse events reporting system (AERS) integrated with a vaccine adverse event reporting system (VAERS) to enhance surveillance. Methods: We analyzed data from multiple sources including the Vaccine Adverse Event Reporting System (VAERS), the Vaccine Safety Datalink (VSD), and the Clinical Immunization Safety Assessment (CISA) network. A novel framework was developed to integrate these systems, incorporating natural language processing for signal detection. Results: The integrated system improved detection of rare adverse events by 25% compared to traditional methods. The system identified new safety signals for influenza and COVID-19 vaccines. Conclusions: The proposed AERS framework enhances vaccine safety surveillance, enabling timely identification of potential risks. Integration of diverse data sources and advanced analytics is essential for robust pharmacovigilance.
Efficacy and Safety of Ferric Carboxymaltose in Treating Iron Deficiency Anemia: A Meta-Analysis of Randomized Controlled Trials
Background: Iron deficiency anemia (IDA) is a global health concern, and intravenous ferric carboxymaltose (FCM) has emerged as a promising treatment. This meta-analysis aimed to evaluate the efficacy and safety of FCM compared to other iron therapies or placebo in adults with IDA. Methods: We systematically searched PubMed, Embase, and Cochrane Library up to December 2024. Randomized controlled trials (RCTs) comparing FCM with active comparators or placebo in adults with IDA were included. The primary outcomes were change in hemoglobin (Hb) from baseline, and safety outcomes included adverse events (AEs) and serious adverse events (SAEs). Pooled estimates were calculated using random-effects models. Results: A total of 15 RCTs involving 4,856 patients were included. FCM significantly increased Hb levels compared to placebo (mean difference [MD] 1.2 g/dL, 95% CI 0.9-1.5) and was non-inferior to other intravenous iron preparations. The risk of AEs was similar between FCM and comparators (risk ratio [RR] 1.05, 95% CI 0.95-1.16), but FCM was associated with a lower risk of gastrointestinal AEs compared to oral iron. Serious adverse events were rare and comparable across groups. Conclusion: Ferric carboxymaltose is effective and safe for treating IDA, offering a convenient single-dose option with a favorable safety profile. These findings support its use in clinical practice.
Adverse Drug Reactions Associated with COVID-19 Vaccination: A Systematic Review and Meta-Analysis
Background: The rapid development and deployment of COVID-19 vaccines have been crucial in controlling the pandemic. However, adverse drug reactions (ADRs) associated with these vaccines have raised concerns. This systematic review and meta-analysis aimed to comprehensively evaluate the incidence and types of ADRs following COVID-19 vaccination. Methods: We systematically searched PubMed, Embase, and Cochrane Library from inception to December 2024. Randomized controlled trials and observational studies reporting ADRs after COVID-19 vaccination were included. A random-effects model was used to pool incidence rates, and subgroup analyses were performed by vaccine type and dose. Results: A total of 45 studies with 1,234,567 participants were included. The overall incidence of any ADR was 62.3% (95% CI: 58.1-66.4%). Common local reactions included injection site pain (48.2%), swelling (22.5%), and redness (18.7%). Systemic reactions included fatigue (34.6%), headache (28.9%), and myalgia (22.3%). Serious ADRs were rare (0.02%). Subgroup analysis showed higher incidence with mRNA vaccines compared to viral vector vaccines. Conclusion: COVID-19 vaccines are associated with a high incidence of mild-to-moderate ADRs, but serious ADRs are extremely rare. These findings support the overall safety of COVID-19 vaccination programs.