Publications by authors named "SangEun Nam"

To investigate whether environmental concentrations of fragmented polyethylene terephthalate (PET) microplastics (MPs) have additional or combined effects on endocrine-disrupting activity, Java medaka (Oryzias javanicus) were exposed to 17β-estradiol (E2; 5, 10, 50, and 100 ng L), bisphenol A (BPA; 5, 10, 50, and 100 µg L), and E2 and BPA combined with PET MPs (1 and 100 particles L) for 200 days. The growth parameters, such as body length and weight, were significantly decreased by the highest concentrations of E2 and BPA. A significant reduction in egg production was observed in female fish exposed to BPA, with an additive toxic effect of PET MPs.

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The pale chub, (Cypriniformes; Xenocyprididae; homotypic synonym: ; Jordan & Evermann, 1902), is widely distributed in the freshwater ecosystems throughout East Asia, including South Korea. In this study, we constructed a genome assembly of to serve as a reference for fundamental and applied research. The assembly was generated using a combination of long-read Pacific Bioscience (PacBio) sequencing, short-read Illumina sequencing, and Hi-C sequencing technologies.

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We conducted a comprehensive assessment involving acute effects on 96-hour survival and biochemical parameters, as well as chronic effects on growth and reproduction spanning three generations of the marine mysid Neomysis awatschensis exposed to filtered wastewater to evaluate the potential impact of ship hull-cleaning wastewater on crustaceans. The analyzed wastewater exhibited elevated concentrations of metals, specifically zinc (Zn) and copper (Cu) and metal-based antifoulants, i.e.

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Article Synopsis
  • The study evaluates whether patients who are predicted to have a pathologic complete response (pCR) after neoadjuvant systemic therapy (NST) for breast cancer can safely skip surgery, using MRI and vacuum-assisted biopsy (VAB) as diagnostic tools.
  • It involves a multicenter trial across 17 hospitals in South Korea, focusing on patients who meet specific criteria, including having a clip marker in the tumor and favorable MRI results post-NST.
  • The research aims to potentially change clinical practices by demonstrating that omitting surgery could lead to a similar 5-year disease-free survival rate, ultimately enhancing the quality of life for patients who respond exceptionally well to treatment.
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  • Harmful algal blooms (HABs) from dinoflagellates negatively impact fish health, particularly after long-term exposure to low concentrations, as shown in juvenile red seabream studied over 60 days.
  • Significant physiological changes were observed, including increased respiration rates, elevated stress hormone levels (plasma cortisol), and heightened oxidative stress markers in gill and liver tissues after exposure to high cell concentrations of dinoflagellates.
  • The study indicated that fish immunity was compromised, with reduced immune parameters, while liver function appeared impaired, suggesting that even non-toxic algal strains can have harmful effects on fish over time.
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The presence and toxicity of waterborne diuron in aquatic environments pose a severe threat to non-target organisms. However, the chronic impact of diuron in marine fish has been poorly investigated. In this study, we report the chronic effects (30 and 60 days) of environmentally relevant concentrations of diuron (0.

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Here, we sequenced and annotated the complete mitochondrial genome for the terebellid polychaete, (Malmgren 1866). The complete mitogenome of is 15,823 bp, with 33.4% A, 18.

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Here, we report information on the complete mitochondrial genome of the firemouth cichlid, (Brind 1918). Illumina HiSeq genome sequencing produced the assembly of a circular mitogenome of 16,527 base pairs (bp) from consisting of 46.8% GC nucleotides, 13 protein-coding genes (PCGs), two ribosomal RNA (rRNA) genes, 22 transfer RNA (tRNA) genes, and a putative control region as shown in the typical teleost gene composition.

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We sequenced and annotated the complete mitochondrial genome for the freshwater water flea (Straus, 1820). This is the first mitogenome for the family Moinidae. The complete mitogenome of is 16,072 bp, with 35.

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Article Synopsis
  • The study presents the full mitochondrial genome of the rainbow krib fish (Boulenger 1901), sequenced using Illumina HiSeq technology, totaling 17,196 base pairs.
  • The genome consists of 13 protein-coding genes, 2 ribosomal RNA genes, 22 transfer RNA genes, and a potential control region, aligning with typical cichlid gene structure.
  • Phylogenetic analysis indicates that the rainbow krib is closely related to another cichlid species, highlighting the need for more complete mitochondrial genomes to better understand the evolution of West African cichlids.
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In this study, the toxicity of hexavalent chromium [Cr(VI)] reduced by citric acid in ice was measured using representative aquatic model invertebrates (, rotifer, water flea, amphipod, and polychaete) and a vertebrate (zebrafish) by analyzing short- and/or long-term endpoints that are frequently applied to each animal. Cr(VI) reduction in the presence of citric acid was markedly enhanced in the ice phase compared to that in an aqueous solution through the freeze concentration effect. The highly concentrated Cr(VI) and citric acid in ice grain boundaries were also confirmed using cryogenic confocal Raman spectroscopy.

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Here, we report the complete mitogenome information of the six-line wrasse (Bleeker, 1857). Genome sequencing using the Illumina HiSeq platform allowed the assembly of a circular mitochondrial genome of 17,111 bp from consisting of 54% AT nucleotides, 13 protein-coding genes (PCGs), two ribosomal RNA (rRNA) genes, 22 transfer RNA (tRNA) genes, and a putative control region in the typical Labriformes gene composition. The gene order of the mitochondrion was identical to that of the Labridae mitogenomes.

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Saxitoxin produced by dinoflagellates and cyanobacteria can be transferred to humans through intoxicated organisms such as fish, but limited research has addressed the adverse effects of this toxin on aquatic organisms. In this study, we measured the potential effects of a 90-day exposure to saxitoxin (0.1 or 1 µg·L  ) on body weight and length, antioxidant defense system, immunity, sex hormones, and genes involved in associated key metabolic pathways in zebrafish (Danio rerio).

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In this study, the complete 16,583 bp mitochondrial genome of (Poll, 1952) was determined from a specimen sourced from Lake Tanganyika. The mitogenome contains 37 genes [13 protein-coding genes (PCGs), two ribosomal RNA (rRNA) genes, and 22 transfer RNA (tRNA) genes] and a putative control region, which consists of 27.1% A, 27.

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Here, we report the complete mitogenome information of the terebellid polychaete, (Schmarda, 1861). Genome sequencing by Illumina HiSeq platform permitted assembly of a circular mitochondrial genome of 15,628 bp from consisting of 67% AT nucleotides, 13 protein-coding genes (PCGs), 2 ribosomal RNA (rRNA) genes, 22 transfer RNA (tRNA) genes, and a non-coding region in the typical annelid gene composition. Gene order of the mitochondrion is identical to those of the Terebelliformia mitogenomes.

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Alexandrium affine is a global harmful algal bloom (HAB)-forming dinoflagellate. In this study, the effect of non-toxin-producing A. affine on the gill and liver tissues of red seabream, Pagrus major, was analyzed over 24 h exposure and 2 h depuration phases.

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In this study, we report the complete mitogenome sequence of the polychaete, (Sars, 1851). The circular mitochondrial genome is 15,696 bp in length and has an AT content of 66%. As in other polychaetes, the genome has 13 protein-coding genes (PCGs), two ribosomal RNA (rRNA) genes, 22 transfer RNA (tRNA) genes, and a non-coding region.

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To increase the mitogenome data available for robust phylogeny, we sequenced the complete mitochondrial DNA of the scale worm (Sars, 1861) in the family Polynoidae of the order Phyllodocida. The complete mitogenome has 15,366 bp and has 28.9% A, 13.

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Purpose: Obesity strongly affects the prognosis of various malignancies, including breast cancer. Leptin (LEP) may be associated with obesity and breast cancer prognosis. The purpose of our study was to determine the prognostic value of LEP in breast cancer.

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Here, we present the first whole mitogenome sequence of the marine polychaete, , isolated from the Beaufort Sea. The mitochondrial genome of is 15,757 bp in length and consists of 13 protein-coding genes (PCGs), 22 transfer RNA (tRNA) genes, 2 ribosomal RNA (rRNA) genes, and a non-coding region that is typical of polychaetes. GC content of the mitogenome is 37.

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The common sunstar, , belongs to the family Solasteridae whose ordinal classification has been unstable. Here, for the first time, we assembled and annotated the complete mitochondrial genome of the common sunstar, Linnaeus, 1767. The circular genome of is 16,335 bp in length and contains 13 protein-coding genes (PCGs), 22 transfer RNA (tRNA) genes, a control region, and large and small ribosomal subunits.

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Bleeker, 1853 (Pomacentridae) is a bright yellow damselfish. Here, we assembled a complete 16,801 bp genome for mitochondrion by employing the Illumina MiSeq platform. The complete mitochondrial genome contained 13 protein-coding genes (PCGs), 22 transfer RNA (tRNA) genes, two ribosomal RNA (rRNA) genes, and one putative control region.

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In this study, we report the sequence of the mitochondrial genome (mitogenome) of the crinoid echinoderm, species (Echinodermata, Crinoidea). The complete mitogenome of sp. was 15,792 base pairs long and was composed of 13 protein-coding genes (PCGs), two ribosomal RNA (rRNA) genes, 22 transfer RNA (tRNA) genes, and three regions of unassigned sequence (UAS) including one putative control region.

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To date, only five species are registered in the genus , and complete mitochondrial genome is reported in one species, . In this study, a complete 15,783 bp genome for the marine polychaete mitochondrion was assembled through Illumina HiSeq platform. The complete mitochondrial genome of contained 13 protein-coding genes (PCGs), 22 transfer RNA (tRNA) genes, two ribosomal RNA (rRNA) genes, and one control region.

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In aquatic animals, hypoxia is associated with growth retardation, impaired immunity, susceptibility to pathogens, oxidative stress, and mortality. However, the relative long-term effects of hypoxia on bivalves, including abalone, are not well understood. In this study, we examined the effects of exposure to hypoxic (2.

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