Publications by authors named "Ruokai Lin"

Background: Breast cancer is the most commonly diagnosed cancer and the second leading cause of cancer-related deaths in women worldwide. Approximately 20-30% of women diagnosed with early-stage breast cancer eventually develop metastatic disease. Current biomarkers, such as CA15-3 and CEA, detect metastasis in only 60-80% of cases, underscoring the need for improved diagnostic tools.

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Article Synopsis
  • Breast cancer leads to high mortality rates among women globally, prompting research on plasma sample methylation to discover potential biomarkers for early detection and prognosis.
  • Using various techniques like quantitative methylation-specific PCR and RNA sequencing, the study identified significant hypermethylation in breast cancer tissues, correlating it with poor survival outcomes and advanced cancer stages.
  • The findings suggest that hypermethylation in blood can act as a noninvasive biomarker, and therapies targeting specific genes like SRCIN1 may improve treatment strategies for breast cancer patients.
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Background And Aims: Plants can propagate generatively and vegetatively. The type of propagation and the resulting propagule can influence the growth of the plants, such as plant architectural development and pattern of biomass allocation. Potato is a species that can reproduce through both types of propagation: through true botanical seeds and seed tubers.

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The study used clinical data to develop a prediction model for breast cancer survival. Breast cancer prognostic factors were explored using machine learning techniques. We conducted a retrospective study using data from the Taipei Medical University Clinical Research Database, which contains electronic medical records from three affiliated hospitals in Taiwan.

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Epigenetic alterations play a pivotal role in cancer treatment outcomes. Using the methylation array data and The Cancer Genome Atlas (TCGA) dataset, we observed the hypomethylation and upregulation of thiosulfate sulfurtransferase-like domain containing 1 () in patients with breast cancer. We examined paired tissues from Taiwanese patients and observed that 65.

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Background: Approximately 25% of patients with early-stage breast cancer experience cancer progression throughout the disease course. Alterations in TMEM240 in breast cancer were identified and investigated to monitor treatment response and disease progression.

Methods: Circulating methylated TMEM240 in the plasma of breast cancer patients was used to monitor treatment response and disease progression.

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Colorectal cancer (CRC) arises from chromosomal instability, resulting from aberrant hypermethylation in tumor suppressor genes. This study identified hypermethylated genes in CRC and investigated how they affect clinical outcomes. Methylation levels of specific genes were analyzed from The Cancer Genome Atlas dataset and 20 breast cancer, 16 esophageal cancer, 33 lung cancer, 15 uterine cancer, 504 CRC, and 9 colon polyp tissues and 102 CRC plasma samples from a Taiwanese cohort.

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The early detection of cancer can reduce cancer-related mortality. There is no clinically useful noninvasive biomarker for early detection of breast cancer. The aim of this study was to develop accurate and precise early detection biomarkers and a dynamic monitoring system following treatment.

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The incidence and mortality rates of colorectal cancer (CRC) have been high in recent years. Prevention and early detection are crucial for decreasing the death rate. Therefore, this study aims to characterize the alteration patterns of mothers against decapentaplegic homolog 3 () in patients with CRC and its applications in early detection by using a genome-wide methylation array to identify an aberrant hypomethylation site in the intron position of the gene.

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Background: Gene silencing by aberrant DNA methylation of promoter regions remains the most dominant phenomenon occurring during tumorigenesis. Improving the early diagnosis, prognosis, and recurrence prediction of colorectal cancer using noninvasive aberrant DNA methylation biomarkers has encouraging potential. The aim of this study is to characterize the DNA methylation of the promoter region of TMEM240, as well as gene expression and its effect on cell biological functions and its applications in early detection and outcome prediction.

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Objectives: militaris has been used as a herbal tonic in traditional Chinese medicine, which could be surface liquid-cultured for production. To evaluate the potential of polysaccharides obtained from of (PS-MCM) for attenuation of side-effects of chemotherapy.

Methods: Doxorubicin was used to induce cytotoxicity in THP-1 monocytes and EL-4 T cells, and the effects of PS-MCM on cell viability and cytokine production were detected on doxorubicin-treated THP-1 and EL-4 cells.

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Article Synopsis
  • * The study identified CCND2 as a common target, revealing that promoter hypermethylation occurs in about 40.9% of breast tumors and 44.4% of circulating DNA in patients, indicating its poor prognostic significance.
  • * Treatment with the demethylating agent antroquinonol D increased CCND2 expression and inhibited cancer growth and migration, suggesting CCND2 hypermethylation could be a useful diagnostic and therapeutic target.
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Aberrant hypermethylation of CpG islands in tumor suppressor genes (TSGs) contributes to colorectal tumorigenesis. To identify new colorectal cancer (CRC) screening marker, we investigated DNA methylation alterations in novel TSGs. Using HumanMethylation450 BeadChip arrays, CpG regions in were the most highly methylated among all genomic regions in 26 colorectal tumors compared to paired non-neoplastic tissues from a Taiwan cohort.

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Six new eremophilane-type sesquiterpenes, namely, nigriterpenes A-F (1-6), and one new phenolic compound, named 2-hydroxymethyl-3-pentylphenol (7), along with fomannoxin alcohol, 3-butyl-7-hydroxyphthalide, scytalone, and fomannoxin were isolated from the ethyl acetate extracts of the fermented broths of termite nest-derived Xylaria nigripes, which has long been used as a traditional Chinese medicine for treating insomnia and depression. Their structures were elucidated on the basis of spectroscopic data analysis and compared with the literature. All the pure isolates were evaluated against lipopolysaccharide-induced inducible nitric oxide synthase (iNOS), cyclooxygenase-2 (COX-2) expression, and NO production in murine brain microglial BV-2 cells.

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Seven new polyketides, phomaketides A-E (1-5) and pseurotins A (6) and G (7), along with the known compounds FR-111142, pseurotins A, A, A, D, and F, 14-norpseurotin A, α-carbonylcarbene, tyrosol, cyclo(-l-Pro-l-Leu), and cyclo(-l-Pro-l-Phe), were purified from the fermentation broth and mycelium of the endophytic fungal strain Phoma sp. NTOU4195 isolated from the marine red alga Pterocladiella capillacea. The structures were established through interpretation of spectroscopic data.

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Article Synopsis
  • - Hydroxamate compounds can kill cancer cells by generating reactive oxygen species (ROS), and this study modified lovastatin to include a hydroxamate core to enhance its effectiveness.
  • - The new compounds showed increased ROS production compared to lovastatin, with compound 3c demonstrating the strongest activity against cancer cells, outperforming the chemotherapy drug cisplatin in prostate and breast cancer cell lines.
  • - Compound 3c had lower toxicity on normal human cells, suggesting it is more selective for cancer cells, and its effectiveness is linked to its ability to generate ROS and activate certain cellular signaling pathways.
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One new sesquiterpenoid, namely coprinol (1), along with guanacastanes J (2), E (3) and N (4), were isolated from the ethyl acetate extracts of the fermented broths of the fungal strain Coprinellus radians ≠1168. Their structures were elucidated on the basis of spectroscopic data analysis. The growth inhibitory activities against A549 of 1-4 were evaluated, and only 4 exhibited moderate growth inhibitory activity with a GI₅₀ value of 18.

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Background: Treatment resistance and metastasis are the major causes of death among patients with colorectal cancer (CRC). Approximately 20% of surgically treated patients ultimately develop metastases during the follow-up period. Currently, the TNM system is the only available prognostic test.

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Aims: Alterations in histone proteins can lead to breast tumorigenesis. Selective histone deacetylase 8 (HDAC8) inhibitors with fewer adverse effects have been developed. A more comprehensive study of alterations and its mechanisms in HDAC8 is required.

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Kawasaki disease (KD) is characterized by pediatric systemic vasculitis of an unknown cause. The low affinity immunoglobulin gamma Fc region receptor II-a (FCGR2A) gene was reported to be involved in the susceptibility of KD. DNA methylation is one of the epigenetic mechanisms that control gene expression; thus, we hypothesized that methylation status of CpG islands in FCGR2A promoter associates with the susceptibility and therapeutic outcomes of Kawasaki disease.

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Introduction: DNA methyltransferase 3B (DNMT3B) contributes to de novo DNA methylation and its overexpression promotes tumorigenesis. However, whether DNMT3B is upregulated by transcriptional deregulation remains unclear.

Methods: We studied the transcriptional repression of DNMT3B by forkhead O transcription factor 3a (FOXO3a) in lung cancer cell, animal, and clinical models.

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DNA methyltransferase 1 (DNMT1) catalyzes DNA methylation and is overexpressed in various human diseases, including cancer. A rational approach to preventing tumorigenesis involves the use of pharmacologic inhibitors of DNA methylation; these inhibitors should reactivate tumor suppressor genes (TSGs) in tumor cells and restore tumor suppressor pathways. Antroquinonol D (3-demethoxyl antroquinonol), a new DNMT1 inhibitor, was isolated from Antrodia camphorata and identified using nuclear magnetic resonance.

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Cancer is a leading cause of death worldwide. Aberrant promoter hypermethylation of CpG islands associated with tumor suppressor genes can lead to transcriptional silencing and result in tumorigenesis. DNA methyltransferases (DNMTs) are the enzymes responsible for DNA methylation and have been reported to be over-expressed in various cancers.

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Tumor suppressor gene silencing through cytosine methylation contributes to cancer formation. Whether DNA demethylation enzymes counteract this oncogenic effect is unknown. Here, we show that TET1, a dioxygenase involved in cytosine demethylation, is downregulated in prostate and breast cancer tissues.

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Purpose: Overexpression of DNA 5'-cytosine-methyltransferase 3A (DNMT3A), which silences genes including tumor suppressor genes (TSG), is involved in many cancers. Therefore, we examined whether the transcriptional deregulation of RB/MDM2 pathway was responsible for DNMT3A overexpression and analyzed the therapeutic potential of MDM2 antagonist for reversing aberrant DNA methylation status in lung cancer.

Experimental Design: The regulation of DNMT3A expression and TSG methylation status by RB/MDM2 was assessed in cancer cell lines and patients.

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