Publications by authors named "Jeng-Jer Shieh"

Linagliptin, a potent dipeptidyl peptidase 4 (DPP4) inhibitor, demonstrates significant potential as a therapeutic agent for hepatocellular carcinoma (HCC). This study evaluated the effects of linagliptin on HCC cell lines, focusing on mechanisms involving reactive oxygen species (ROS) production, nuclear factor erythroid 2-related factor 2 (NRF2) pathway activation, and autophagy. Linagliptin effectively suppressed cell proliferation and induced apoptosis in HCC cell lines, particularly Hep3B cells, while sparing normal hepatic cells.

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Renal cell carcinoma (RCC) is a formidable and lethal form of kidney cancer, necessitating the exploration of novel therapeutic options. Isoliensinine, an alkaloid derived from lotus seed embryos, has shown promising anti-cancer properties. However, its mechanistic actions and impact on mitochondrial dynamics remain poorly understood.

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The benefits of sodium-glucose transport protein 2 inhibitor (SGLT2i) use on severe urolithiasis requiring surgery remains unclear. All patients with incident T2D in Taiwan National Health Institution databases (2016-2021) and TriNetX datasets (2014-2023) were retrospectively analyzed. The study analyzed a propensity score-matched pairs with T2D treated with SGLT2i or dipeptidyl peptidase 4 inhibitors (DPP4i).

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Mitochondria, vital organelles that generate ATP, determine cell fate. Dysfunctional and damaged mitochondria are fragmented and removed through mitophagy, a mitochondrial quality control mechanism. The FDA-approved drug IMQ, a synthetic agonist of Toll-like receptor 7, exhibits antitumor activity against various skin malignancies.

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Short-chain fatty acids (SCFAs) have been proposed to have anti-inflammatory effects and improve immune homeostasis. We aimed to examine the effects of SCFAs on skin phenotype, systemic inflammation, and gut microbiota in mice with psoriasis-like inflammation. Imiquimod (IMQ)-treated C57BL/6 mice served as the study model.

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In sepsis, bacterial components, particularly lipopolysaccharide (LPS), trigger organ injuries such as liver dysfunction. Although sepsis induces hepatocyte damage, the mechanisms underlying sepsis-related hepatic failure remain unclear. In this study, we demonstrated that the LPS-treated rat hepatocyte cell line Clone 9 not only induced reactive oxygen species (ROS) generation and apoptosis but also increased the expression of the autophagy marker proteins LC3-II and p62, and decreased the expression of intact Lamp2A, a lysosomal membrane protein.

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Article Synopsis
  • Melanogenesis not only protects the skin from UV radiation but also influences melanoma behavior, and this study investigates the effect of Imiquimod (IMQ) on this process in melanoma cells.
  • IMQ, a TLR7 agonist, was found to induce melanogenesis in B16F10 mouse melanoma cells by enhancing crucial proteins and tyrosinase activity, leading to increased pigmentation.
  • The mechanism involves elevated levels of intracellular cAMP due to IMQ's inhibition of phosphodiesterase 4B, along with reactive oxygen species (ROS) playing a role in activating this pathway.
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Importance: The association between sodium-glucose transport protein 2 inhibitor (SGLT2i) use and the incidence of acute kidney injury (AKI) remains controversial. The benefits of SGLT2i use in patients to reduce AKI requiring dialysis (AKI-D) and concomitant diseases with AKI as well as improve AKI prognosis have not yet been established.

Objective: To investigate the association between SGLT2i use and AKI incidence in patients with type 2 diabetes (T2D).

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Background: Lysosomal cell death is induced by lysosomal membrane permeabilization (LMP) and the subsequent release of lysosomal proteolytic enzymes, including cathepsins (CTSs), which results in mitochondrial dysfunction and apoptosis. Imiquimod (IMQ), a synthetic TLR7 ligand, has both antiviral and antitumor activity against various skin malignancies in clinical treatment. Previously, we demonstrated IMQ not only caused lysosomal dysfunction but also triggered lysosome biogenesis to achieve lysosomal adaptation in cancer cells.

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Context: Protocatechuic aldehyde (PCA) is a natural product that has various benefits for fibrosis.

Objective: This study evaluated the effects of PCA on renal fibrosis.

Materials And Methods: Epithelial-mesenchymal transition (EMT) was induced by 20 ng/mL transforming growth factor-β1 (TGF-β1), followed by treatment with 1 and 5 μM PCA, in the rat renal proximal tubular cell line NRK-52E.

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Sodium-glucose cotransporter 2 inhibitor (SGLT2i) potentially decrease all-cause and cardiovascular death, however, associations with non-cardiovascular death remain unclear. Therefore, we investigated SGLT2i associations with death and the cause of death. We used the Taiwanese National Health Institutes Research database linked to the National Register of Deaths (NRD).

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Importance: The use of sodium-glucose transport protein 2 (SGLT2) inhibitors is currently a standard intervention in patients with type 2 diabetes (T2DM) and exerts favorable pleiotropic effects to consistently lower blood urate levels. However, to date, no association between SGLT2 inhibitor use and the incidence of gout have been established.

Objective: To investigate whether prescribed SGLT2 inhibitors are associated with lower gout incidence in patients with T2DM.

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Diabetic nephropathy (DN) is one of the most severe chronic kidney diseases in diabetes and is the main cause of end-stage renal disease (ESRD). Protocatechuic aldehyde (PCA) is a natural product with a variety of effects on pulmonary fibrosis. In this study, we examined the effects of PCA in C57BL/KS db/db male mice.

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Background: The impact of peritoneal dialysis-associated peritonitis (PD peritonitis) on long-term outcomes is uncertain. This nationwide retrospective study was conducted in Taiwan to understand the incidence, risk factors and long-term outcomes of PD peritonitis.

Methods: A total of 11,202 incident adult peritoneal dialysis (PD) patients from 2000 to 2010 were collected from a Longitudinal Health Insurance Database and followed up until the end of 2011.

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We analyzed database from the Taiwan National Health Insurance to investigate whether primary aldosteronism (PA) increases the risk of bladder stones. This retrospective nationwide population-based cohort study during the period of 1998-2011 compared patients with and without PA extracted by propensity score matching. Cox proportional hazard models and competing death risk model were used to estimate the hazard ratios (HRs), sub-hazard ratios (SHRs) and corresponding 95% confidence intervals (CIs).

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Lysosomal adaptation is a cellular physiological process in which the number and function of lysosomes are regulated at the transcriptional and post-transcriptional levels in response to extracellular and/or intracellular cues or lysosomal damage. Imiquimod (IMQ), a synthetic toll-like receptor 7 ligand with hydrophobic and weak basic properties, exhibits both antitumor and antiviral activity against various skin malignancies as a clinical treatment. Interestingly, IMQ has been suggested to be highly concentrated in the lysosomes of plasmacytoid dendritic cells, indicating that IMQ could modulate lysosome function after sequestration in the lysosome.

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Skin cancer is caused by abnormal proliferation, gene regulation and mutation of epidermis cells. Compound C is commonly used as an inhibitor of AMP-activated protein kinase (AMPK), which serves as an energy sensor in cells. Recently, compound C has been reported to induce apoptotic and autophagic death in various skin cancer cell lines via an AMPK-independent pathway.

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Article Synopsis
  • In 2008, guidelines were established for researching autophagy, which has since gained significant interest and new technologies, necessitating regular updates to monitoring methods across various organisms.
  • The new guidelines emphasize selecting appropriate techniques to evaluate autophagy while noting that no single method suits all situations; thus, a combination of methods is encouraged.
  • The document highlights that key proteins involved in autophagy also impact other cellular processes, suggesting genetic studies should focus on multiple autophagy-related genes to fully understand these pathways.
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Article Synopsis
  • A 12-year study analyzed long-term outcomes of patients using combined peritoneal dialysis (PD) and hemodialysis (HD) therapy compared to those who switched directly from PD to HD.
  • In a matched sample of 1,376 patients, overall admission and mortality risks were similar for both treatment groups, but combined therapy patients with recent peritonitis had a higher admission risk.
  • The findings suggest combined therapy is a rational and cost-effective option for PD patients, especially those without recent peritonitis, highlighting the importance of understanding its benefits and drawbacks in dialysis care.
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Article Synopsis
  • The study investigates how Imiquimod (IMQ), a treatment for skin cancers, affects mitochondrial function and cell death by generating reactive oxygen species (ROS).
  • Researchers found that IMQ treatment led to increased ROS production, loss of mitochondrial function, enhanced mitochondrial fission, and elevated mitophagy in skin cancer cells compared to normal cells.
  • The antioxidant NAC successfully reduced IMQ-induced ROS levels, mitigating the adverse effects on mitochondrial dynamics and suggesting potential therapeutic strategies for improving treatment outcomes in skin cancer.
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Hepatocellular carcinoma (HCC), a hepatic malignancy, has a poor prognosis and contributes to cancer-related death worldwide. Cellular senescence is an anticancer therapeutic strategy that causes irreversible cell cycle arrest and enables immune-mediated clearance of cancer cells. Atorvastatin, an HMG-CoA reductase inhibitor, has been shown to inhibit tumor growth and induce apoptosis or autophagy in malignant tumors.

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The induction of immunogenic cell death (ICD) in cancer cells triggers specific immune responses against the same cancer cells. Imiquimod (IMQ) is a synthetic ligand of toll-like receptor 7 that exerts antitumor activity by stimulating cell-mediated immunity or by directly inducing apoptosis. Whether IMQ causes tumors to undergo ICD and elicits a specific antitumor immune response is unknown.

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Macrophages are characterized by phenotypical and functional heterogeneity. In different microenvironments, macrophages can polarize into two types: classically activated macrophages (M1) or alternatively activated macrophages (M2). M1 macrophages are a well-known bacteriostatic macrophage, and conversely, M2 macrophages may play an important role in tumor growth and tissue remodeling.

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Atopic dermatitis (AD) is a chronic inflammatory skin disease and sometimes is a tough challenge for physicians. We previously reported that in Th2 environment, the production and secretion of thymic stromal lymphopoietin (TSLP) from human keratinocytes was inhibited by recombinant heat shock protein 70 (rHSP70). The present study assessed the therapeutic effectiveness of rHSP70 in a mouse model of AD.

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Objectives: The intestinal microbiota has been known to involve in obesity and host immune response. We aimed to investigate the intestinal microbiota and potential genetic function in relation to clinical presentation in psoriasis patients.

Methods: Faecal microbiota and predicted genetic function inferred from high-throughput 16S ribosomal RNA sequencing were analysed between psoriasis (n = 32) and age-, gender- and body mass index (BMI)-matched non-psoriasis subjects (n = 64), from a referral medical centre.

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