Publications by authors named "Ji Hyang Kim"

Recurrent pregnancy loss (RPL) is defined as the occurrence of two or more pregnancy losses before 20 weeks of gestation. RPL is a common medical condition among reproductive-age women, with approximately 23 million cases reported annually worldwide. Up to 5% of pregnant women may experience two or more consecutive pregnancy losses.

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Recurrent pregnancy loss (RPL) is defined as the occurrence of two or more consecutive pregnancy losses before 20 weeks of gestation, encompassing both embryonic and fetal losses. Although previous studies have provided substantial insights into RPL, the causes in many cases remain unexplained. This lack of information has prompted continued investigation into various risk factors, including those identified through next-generation sequencing (NGS).

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Unlabelled: Matsumura is an important medicinal species in traditional Korean medicine, commonly employed for addressing a range of health issues. The fruit of is abundant in anthocyanins, which possess strong antioxidant activity and effectively neutralize free radicals. In the present investigation, to optimize the extraction parameters for anthocyanins obtained from the fruit of , response surface methodology was employed.

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Triple-negative breast cancer (TNBC) poses significant challenges as it lacks specific treatment approaches. In this study, we synthesized niobium-nitrogen-doped titanium dioxide (Nb-NTO) nanoparticles (NPs) functionalized with Mentha arvensis ethanolic and Mucuna pruriens methanolic extracts and evaluated their anti-cancer potential against MDA-MB-231 TNBC cells. The functionalization of doped Nb-NTO NPs with Mentha arvensis and Mucuna pruriens extract exhibited significant synergistic effects, reducing cell viability in a dose-dependent manner with enhanced cytotoxicity at lower concentrations compared to individual treatments.

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The Makino, an economically significant ornamental plant, is observed in small numbers in its natural habitat on Jeju Island in South Korea. of Jeju is afforded protection due to a decline in its population resulting from environmental changes and illegal poaching. We developed simple sequence repeat (SSR) markers to analyze the differences to other through molecular genetic studies.

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Background: This exploratory study applied Q methodology to identify the types of family caregivers of older adults in nursing homes during the COVID-19 pandemic based on their perceptions of the caregiving role and explore each type's characteristics.

Methods: Q statements were derived from in-depth interviews and a review of prior research. Q sorting was conducted using 39 P samples on a nine-point scale to determine Q distributions according to the degree of subjective agreeableness for each statement.

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Objectives: MicroRNAs (miRNAs) are pivotal in post-transcriptionally modulating gene expression in both animals and plants. This study investigates the relationship between microRNA polymorphisms and the occurrence of primary ovarian insufficiency in Korean women. Our hypothesis posits that polymorphisms in microRNAs-specifically miR-10aA > T, miR-30cA > G, miR-181aT > C, and miR-499bA > G-may be linked to primary ovarian insufficiency, influencing the risk of developing the condition.

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  • This study investigates the effects of intrauterine infusion of platelet-rich plasma (PRP) on improving endometrial thickness and pregnancy outcomes in patients with a history of failed IVF attempts and thin endometrium.
  • The research involved 91 patients receiving PRP treatment before embryo transfer, resulting in a live birth rate of 20.9% and a significant increase in implantation rates compared to previous cycles without PRP.
  • Cytokine analysis revealed increased levels of pro-angiogenic factors, suggesting that PRP may enhance the environment for successful implantation and pregnancy.
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  • Removal of Crb1 and Crb2 disrupts cell-cell adhesion in the developing mouse retina, resulting in disorganization and functional deficits akin to Leber congenital amaurosis 8.
  • Mutant retinal progenitor cells (RPCs) show crucial defects, including misplacement of key structures and disorganized cell positioning, which affects their development.
  • These abnormalities lead to improperly formed retinal layers and mixed cell types in the retina, contributing to the LCA8-like phenotype observed in the mouse model.
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  • Primary ovarian insufficiency (POI) is a condition causing menstrual disturbances and ovarian dysfunction in women before age 40, with a prevalence of less than 1% that may vary based on ethnicity.
  • The study investigated specific genetic polymorphisms in the follicle-stimulating hormone receptor (FSHR), estrogen receptor 1 (ESR1), and their relation to ovarian health in 139 Korean patients with POI compared to 350 controls.
  • Significant associations were found between certain genotype combinations and the risk of POI, particularly involving FSHR and ESR1, which could point to genetic factors influencing the condition's prevalence and enhance understanding for potential treatments.
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  • Primary ovarian insufficiency (POI) is a major cause of female infertility occurring before age 40, associated with TGF-β/BMP signaling pathway genes like TGF-β and BMP15.
  • The study aimed to explore the link between specific gene polymorphisms in this pathway and the risk of developing POI, examining data from 139 patients with POI and 345 controls.
  • Results indicated that certain allele combinations in TGFBR1 and TGFBR3 genes were linked to a reduced risk of POI, suggesting these polymorphisms could serve as potential biomarkers for diagnosing and treating the condition.
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As the most prominent and ideal modality in female fertility preservation, ovarian tissue cryopreservation, and transplantation often confront the challenge of ischemic damage and follicular loss from avascular transplantation. To surmount this impediment, we engineered a novel platelet-derived factors-encapsulated fibrin hydrogel (PFH), a paradigmatic biomaterial. PFH encapsulates autologous platelet-derived factors, utilizing the physiological blood coagulation cascade for precise local delivery of bioactive molecules.

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Idiopathic recurrent pregnancy loss (RPL) is defined as at least two pregnancy losses before 20 weeks of gestation. Approximately 5% of pregnant couples experience idiopathic RPL, which is a heterogeneous disease with various causes including hormonal, chromosomal, and intrauterine abnormalities. Although how pregnancy loss occurs is still unknown, numerous biological factors are associated with the incidence of pregnancy loss, including genetic variants.

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(1) Background: Oxidative stress adversely affects fertility by impairing oocyte fertilization potential, primarily due to meiotic segregation errors and cohesion loss. Superoxide dismutase (SOD) and Coenzyme Q10 (CoQ10) are prominent antioxidants known to mitigate oxidative damage. (2) Methods: This study recruited 86 patients undergoing in vitro fertilization (IVF) at a single center for a 12-week, randomized, double-blind, active-comparator-controlled trial.

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The coronavirus disease 2019 (COVID-19) outbreak caused by SARS-CoV-2 (severe acute respiratory syndrome coronavirus-2) has affected various medical fields worldwide. However, relatively few studies have examined the impact of COVID-19 infection and vaccination on in vitro fertilization (IVF) outcomes and changes in SARS-CoV-2 antibody concentration in follicular fluid (FF). A total of 45 women were prospectively recruited and assigned to 3 groups: uninfected and non-vaccinated control group (Control group), infected group (COVID + group), and vaccinated group (Vaccination group).

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The primary goal of this investigation was to identify mRNA targets affected by dysregulated miRNAs in RIF. This was accomplished by comprehensively analyzing mRNA and miRNA expression profiles in two groups: female subjects with normal reproductive function (control, n = 5) and female subjects experiencing recurrent implantation failure (RIF, n = 5). We conducted transcriptome sequencing and small RNA sequencing on endometrial tissue samples from these cohorts.

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  • * STAT3 is essential for successful embryo implantation, and while its connection to RIF is known, the effect of specific genetic variations in miRNAs on STAT3's role in RIF has not been fully explored.
  • * A study involving 161 RIF patients and 268 healthy individuals found that the genetic variant miR-34a rs6577555 C>A is significantly associated with increased RIF risk, indicating it may play a role in the condition, warranting further research.
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Objectives: To evaluate the effects and mechanisms of action of growth hormone (GH) in the recovery of ovarian function in ovarian insufficiency induced by cyclophosphamide (CP) in a mouse model.

Materials And Methods: After inducing ovarian insufficiency by administering 400 mg/kg of CP intraperitoneally to 6-week-old ICR mice, the mice were divided into four groups (control, CP, 1 mg/kg GH, and 2 mg/kg GH) with 10 mice in each group. GH was administered a week later for 7 days.

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  • * The study examined 151 RIF patients and 321 healthy individuals in Korea to find genetic polymorphisms associated with RIF prevalence, focusing on certain genes related to inflammation.
  • * Significant associations were found between specific polymorphisms (rs1053004, rs1800796, and rs1800629) and the likelihood of experiencing RIF, marking the first investigation of its kind in Korea.
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Recurrent implantation failure (RIF) refers to two or more unsuccessful in vitro fertilization embryo transfers in the same individual. Embryonic characteristics, immunological factors, and coagulation factors are known to be the causes of RIF. Genetic factors have also been reported to be involved in the occurrence of RIF, and some single nucleotide polymorphisms (SNPs) may contribute to RIF.

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  • The study investigates how factors like age, ethnicity, and BMI affect serum anti-mullerian hormone (AMH) levels in Asian women receiving fertility treatments.
  • A total of 4,556 women aged 20-43 from various Asian ethnic backgrounds participated in a multi-center study, revealing that AMH levels decline significantly with age and are influenced by obesity and conditions like polycystic ovarian syndrome (PCOS).
  • The findings show a mean AMH level of 3.44 ng/ml across all ages, with optimal PCOS diagnosis at a concentration of 4.0 ng/ml, indicating poorer reproductive outcomes for older women.
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To evaluate the safety and effectiveness of recombinant human follicle-stimulating hormone (rhFSH [Follitrope™]) in infertile women undergoing in vitro fertilization (IVF). To identify predictors of ovarian response that induce optimal clinical outcomes. This multicenter prospective study enrolled infertile women who were scheduled to undergo IVF after ovarian stimulation with rhFSH (Follitrope™) following the gonadotropin-releasing hormone (GnRH) agonist or GnRH antagonist protocol.

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  • - Recurrent pregnancy loss (RPL) affects 1-5% of women and can significantly impact their reproductive health and mental well-being.
  • - The study analyzed the impact of specific genetic polymorphisms (rs4759314 A>G, rs920778 T>C, rs1899663 G>T, rs7958904 G>C) on RPL in a sample of 403 women with RPL compared to 383 healthy women.
  • - Results indicated that the rs4759314 A>G and rs920778 T>C polymorphisms were strongly linked to a higher risk of RPL, with specific haplotypes maintaining this association among Korean women.
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This study investigated the genetic association between recurrent pregnancy loss (RPL) and microRNA (miRNA) polymorphisms in miR-10aA>T, miR-30cA>G, miR-181aT>C, and miR-499bA>G in Korean women. Blood samples were collected from 381 RPL patients and 281 control participants, and genotyping of miR-10aA>T, miR-30cA>G, miR-181aT>C, and miR-499bA>G was carried out by TaqMan miRNA RT-Real Time polymerase chain reaction (PCR). Four polymorphisms were identified, including miR-10aA>T, miR-30cA>G, miR-181aT>C, and miR-499bA>G.

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We aimed to assess the efficacy of accumulated embryo transfer (ACC-ET) through several controlled ovarian hyperstimulation (COS) cycles to increase the rates of pregnancy in patients with poor ovarian response (POR). We retrospectively reviewed the medical records of 588 patients with POR under 43-years old who underwent embryo transfer from January 2010 to December 2015. We compared the pregnancy rate (PR), clinical pregnancy rate (CPR), and live birth rate (LBR) between ACC-ET (frozen-thawed: 47; fresh + frozen-thawed: 24) group (n = 71) and fresh ET groups (n = 517).

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