{"id":1239,"date":"2026-03-05T23:03:36","date_gmt":"2026-03-05T16:03:36","guid":{"rendered":"https:\/\/www.wincellresearch.com\/?p=1239"},"modified":"2026-04-01T11:47:03","modified_gmt":"2026-04-01T04:47:03","slug":"%e0%b8%95%e0%b8%b1%e0%b9%89%e0%b8%87%e0%b8%84%e0%b8%a3%e0%b8%a3%e0%b8%a0%e0%b9%8c%e0%b8%a2%e0%b8%b2%e0%b8%81-%e0%b9%80%e0%b8%9e%e0%b8%a3%e0%b8%b2%e0%b8%b0-nk-cells-%e0%b8%a3%e0%b8%b9%e0%b9%89%e0%b9%81%e0%b8%a5%e0%b8%b0%e0%b9%80%e0%b8%95%e0%b8%a3%e0%b8%b5%e0%b8%a2%e0%b8%a1%e0%b8%95%e0%b8%b1%e0%b8%a7%e0%b8%81%e0%b9%88%e0%b8%ad%e0%b8%99%e0%b8%95%e0%b8%b1%e0%b9%89%e0%b8%87%e0%b8%84%e0%b8%a3%e0%b8%a3%e0%b8%a0%e0%b9%8c","status":"publish","type":"post","link":"https:\/\/www.wincellresearch.com\/en\/%e0%b8%95%e0%b8%b1%e0%b9%89%e0%b8%87%e0%b8%84%e0%b8%a3%e0%b8%a3%e0%b8%a0%e0%b9%8c%e0%b8%a2%e0%b8%b2%e0%b8%81-%e0%b9%80%e0%b8%9e%e0%b8%a3%e0%b8%b2%e0%b8%b0-nk-cells-%e0%b8%a3%e0%b8%b9%e0%b9%89%e0%b9%81%e0%b8%a5%e0%b8%b0%e0%b9%80%e0%b8%95%e0%b8%a3%e0%b8%b5%e0%b8%a2%e0%b8%a1%e0%b8%95%e0%b8%b1%e0%b8%a7%e0%b8%81%e0%b9%88%e0%b8%ad%e0%b8%99%e0%b8%95%e0%b8%b1%e0%b9%89%e0%b8%87%e0%b8%84%e0%b8%a3%e0%b8%a3%e0%b8%a0%e0%b9%8c\/","title":{"rendered":"Immunological Barriers to Conception: The Role of NK Cells in Pre-conception Preparedness"},"content":{"rendered":"\t\t
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In today\u2019s fast-paced society, characterized by chronic stress and environmental pollutants, urban dwellers face more than just a demanding lifestyle. These factors also impact modern families desiring children, leading to increased rates of infertility. Despite utilizing scientific advancements\u2014such as sex selection or assisted reproductive technologies (ART) to overcome economic and temporal constraints\u2014many still experience embryonic loss or miscarriage. This occurs even among individuals who appear healthy and have prepared meticulously, because the body possesses internal mechanisms that can trigger pregnancy loss.<\/p>

It is widely accepted that pre-pregnancy preparation typically involves standard blood panels and physical examinations. However, one critical factor often overlooked is the assessment of Natural Killer (NK) cells<\/b>\u2014specifically their quantity and quality. Why is this test necessary? What insights does it provide? And what steps should be taken if abnormalities are detected to mitigate the risk of miscarriage?<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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The Evolution of NK Cell Research<\/b><\/h4>

Research into NK cell levels dates back to 1999, led by Professor Yamamoto and colleagues at the Teikyo University School of Medicine in Tokyo, Japan. Generally, miscarriage is a natural mechanism to prevent embryos with chromosomal abnormalities from further development. However, “erroneous” miscarriages occur when healthy embryos are lost, or conversely, when abnormal embryos continue to grow.<\/p>

Professor Yamamoto investigated the relationship between chromosomal status and white blood cells\u2014the primary cells involved in pregnancy loss. Specifically focusing on NK cells<\/b>, which were previously identified as vital to pregnancy, the study utilized flow cytometry<\/b> to quantify CD56+ NK cells<\/b> in the bloodstream. The findings revealed that CD56+ NK cell levels in miscarriages of normal embryos differed significantly from those of abnormal embryos. This suggests that the proportion of NK cells directly influences the mother’s ability to maintain a healthy pregnancy.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Mechanisms of Embryonic Rejection<\/b><\/h4>

In 2016, Professor Marigoula Varla-Leftherioti published \u201cNatural Killer (NK) Cell Receptors and their Role in Pregnancy and Abortion\u201d<\/i> in the Journal of Immunobiology<\/i>. The study identified that specific NK cells (dNK CD3-CD56brightCD16dim\/-<\/b>) significantly impact the first trimester. Further investigation into the mechanisms of miscarriage found that KIR Receptors<\/b> on NK cells and T lymphocytes cause NK cells to attack the trophoblast<\/b> (the tissue that provides moisture and develops into the placenta). This results in lysis<\/b>, leading to embryonic detachment and subsequent miscarriage.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Establishing Clinical Cut-off Values<\/b><\/h4>

While the link between NK cells and miscarriage was established, a definitive “cut-off” value remained elusive until 2018. Professor Hajar Adib Rad conducted a study on 80 pregnant women in Iran\u2014a region where miscarriage is a prevalent health issue. The research concluded that NK cell levels \u22653.4% (p < 0.015)<\/b> significantly increase the risk of miscarriage.<\/p>

In 2020, Professor Yu-Han Meng and colleagues researched recurrent pregnancy loss during reproductive years, discovering that up to 70% of the cells in the uterine lining are NK cells. This underscored the necessity of finding ways to regulate or balance NK cell quantity and functional health.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Advances in Cell Therapy and Immunotherapy<\/b><\/h4>

Today, we are increasingly familiar with Cell Therapy<\/b> and immunotherapy as novel alternatives for conditions previously deemed untreatable\u2014from bone marrow transplants for thalassemia to leukemia treatments. As of 2022, countries including the USA, Japan, Korea, China, and various European nations have rapidly advanced the use of cell-based therapies for clinical treatment and wellness. For those preparing for pregnancy or facing high-risk miscarriages, specialized options are now emerging.<\/p>

In 2020, Professor Carolyn B. Coulam and her team at Rosalind Franklin University of Medicine and Science, USA, utilized immunotherapy via intravenous intralipid administration<\/b>. Although some previous studies showed inconsistent results, Professor Coulam identified that correct intravenous administration can successfully inhibit the role of NK cells in triggering miscarriage.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Comprehensive Risk Assessment<\/b><\/h4>

Professor Coulam noted that miscarriage results from multiple factors, including maternal conditions (uterine health, hormonal balance, immunity, and blood clotting) and embryonic viability. Intravenous intralipid therapy<\/b> is specifically indicated for cases involving Cytotoxic NK cells<\/b> and pro-inflammatory cytokines<\/b>.<\/p>

By comparing cytotoxic NK cell levels in both uterine tissue and peripheral blood across pregnant and non-pregnant groups, her research found that women with successful, ongoing pregnancies had lower NK cell concentrations than those who experienced miscarriages.<\/p>

Conclusion<\/b><\/h4>

Intralipid treatment can enhance pregnancy success rates in both natural conception and In Vitro Fertilization (IVF)<\/b> by improving embryo implantation and reducing NK cell-mediated miscarriage. However, it is important to note that this therapy does not address miscarriages caused by other factors, such as hormonal imbalances, anatomical limitations, blood clotting disorders, or chromosomal defects.<\/p>

Therefore, before conceiving or undergoing embryo transfer, assessing the quantity and quality of NK cells is a vital step in reducing the risk of pregnancy loss.<\/p>

Consult us for more health information at…<\/strong><\/p>

#WincellResearch<\/p>

Tel. :<\/strong> 02-3994494-5<\/p>

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Sugiura-Ogasawara, M., Ozaki, Y., Sonta, S. I., Makino, T., & Suzumori, K. (2005). Exposure to bisphenol A is associated with recurrent miscarriage. Human reproduction, 20(8), 2325-2329.<\/em><\/p>

L\u00e9d\u00e9e, N., Vasseur, C., Petitbarat, M., Chevrier, L., Vezmar, K., Dray, G., \u2026 & Chaouat, G. (2018). Intralipid\u00ae may represent a new hope for patients with reproductive failures and simultaneously an over-immune endometrial activation. Journal of Reproductive Immunology, 130, 18-22.<\/em><\/p>

Rad, H. A., Basirat, Z., Mostafazadeh, A., Faramarzi, M., Bijani, A., Nouri, H. R., & Amiri, S. S. (2018). Evaluation of peripheral blood NK cell subsets and cytokines in unexplained recurrent miscarriage. Journal of the Chinese Medical Association, 81(12), 1065-1070.<\/em><\/p>

Yamamoto, T., Takahashi, Y., Kase, N., & Mori, H. (1999). Role of decidual natural killer (NK) cells in patients with missed abortion: differences between cases with normal and abnormal chromosome. Clinical & Experimental Immunology, 116(3), 449-452.<\/em><\/p>

Fu, Y. Y., Ren, C. E., Qiao, P. Y., & Meng, Y. H. (2021). Uterine natural killer cells and recurrent spontaneous abortion. American Journal of Reproductive Immunology, 86(2), e13433.<\/em><\/p>

Varla-Leftherioti, M., & Keramitsoglou, T. (2016). Natural killer (NK) cell receptors and their role in pregnancy and abortion. J Immunobiol, 1, 1-6.<\/em><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"

In contemporary society, factors such as chronic stress, demanding lifestyles, and environmental pollutants have contributed to rising infertility rates among urban families. 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