Publications by authors named "Hong-chun Li"

Cervical cancer (CC) ranks as the fourth most prevalent malignant tumor among women worldwide, and is the fourth leading cause of cancer-related mortality. GuiErBai (GEB), a compound preparation developed by our research team, is derived from the ancient Chinese medicine of the Miao nationality and is comprised of podophyllotoxin (PTOX), imperatorin, isoimperatorin, and alkaloids. These individual components have demonstrated notable efficacy in tumor treatment.

View Article and Find Full Text PDF
Article Synopsis
  • The study examined the stable isotopic composition of crustose coralline algae (CCA) from two reef ecosystems in Taoyuan and Linshanbi to assess the impact of sewage pollution on marine life.
  • CCA samples from the ancient reefs (up to 7000 years old) showed lower nitrogen isotope values compared to modern samples, suggesting a rise in pollution levels in more recent times.
  • Higher nitrogen values in intertidal organisms from the Taoyuan CCA reef indicate human-induced stress, highlighting the need for ongoing pollution monitoring and better sewage management strategies.
View Article and Find Full Text PDF
Article Synopsis
  • - Behavioral sensitization to drugs like cocaine leads to increased motor activities and contributes to relapse after quitting; however, the exact mechanisms are not well understood.
  • - This study found that mTOR signaling is activated during cocaine-induced behavioral sensitization, and inhibiting mTOR with rapamycin reduced this sensitivity.
  • - Changes in brain lipids and decreased levels of SynDIG1 were observed, suggesting that SynDIG1 may help maintain GluA2 surface expression, which could reduce cocaine-related behaviors.
View Article and Find Full Text PDF

Taraxasterol (TAS) is an active ingredient of Dandelion ( Hand. -Mazz.), a medicinal plant that has long been used in China for treatment of inflammatory disorders.

View Article and Find Full Text PDF

Uranium (U) geochemistry and its isotopic compositions of reservoir sediments in U mine area were poorly understood. Herein, U and Th isotopic compositions were employed to investigate source apportionment and geochemical behavior of U in 41 reservoir sediments from a U mining area, Guangdong, China. The remarkably high contents of both total U (207.

View Article and Find Full Text PDF

Purpose: Most patients diagnosed with extrahepatic cholangiocarcinoma (ECCA) exhibit cholestasis caused by obstruction of the bile duct. Cholestasis is associated with lipid disorders, but studies focused on the changing lipid parameters in patients with ECCA are lacking. Here, we observed lipid profiles in patients with ECCA and investigated whether the removal of biliary obstruction could correct dyslipidemia.

View Article and Find Full Text PDF

The expansion of anatomically modern humans (AMHs) from Africa around 65,000 to 45,000 y ago (ca. 65 to 45 ka) led to the establishment of present-day non-African populations. Some paleoanthropologists have argued that fossil discoveries from Huanglong, Zhiren, Luna, and Fuyan caves in southern China indicate one or more prior dispersals, perhaps as early as ca.

View Article and Find Full Text PDF

Background: Hyperkalemia is one of the most common complications of chronic renal failure. Pseudohyperkalemia is caused by elevated levels of serum potassium and is usually accompanied by thrombocythemia. Although an elevated level of potassium is typically correlated with impaired renal function, pseudo-hyperkalemia has been rarely reported in patients with chronic renal failure.

View Article and Find Full Text PDF

Introduction: Alzheimer disease (AD) is a neurodegenerative disease characterized by progressive cognitive dysfunction, which is mainly manifested as memory impairment and a reduced ability to self-care, often accompanied by neuropsychiatric and behavioral disorders. Donepezil is the second drug to be approved by the US FDA for the treatment of AD. Of the five FDA-approved drugs for AD treatment, donepezil is currently the most widely used.

View Article and Find Full Text PDF

Decrease of chloride concentration contributes to cardiovascular diseases, however, whether decrease of chloride concentration is involved in platelet activation remains elusive. In the present study, we found that ACI patients had lower serum chloride which would be rescued after Aspirin administration. ADP induced chloride concentration reduction in platelets.

View Article and Find Full Text PDF

Our previous study found that ClC-3 chloride channel functioned differently in the vascular and intestinal inflammation, the loss of ClC-3 reduced vascular inflammation but exacerbated intestinal inflammation. To furtherly clarify the role of ClC-3 chloride channels in systemic inflammation, we used LPS-induced endotoxemia model to investigate the response of wild-type and ClC-3 knockout mice to systemic inflammation. The results showed that in the LPS-induced endotoxemia model, the mortality of mice with ClC-3 deletion was significantly higher than that of wild-type mice.

View Article and Find Full Text PDF

The influence of human nuclear activities on environmental radioactivity is not well known at low latitude regions that are distant from nuclear test sites and nuclear facilities. A sediment core collected from Taal Lake in the central Philippines was analyzed for I and I to investigate this influence in a low-latitude terrestrial system. A baseline of I/I atomic ratios was established at (2.

View Article and Find Full Text PDF

The aim of the present study was to investigate the effects of minocycline on cognitive functions in neonatal rat after hypoxia exposure and the underlying mechanism. A model of hypoxic brain damage (HBD) was developed by exposing postnatal 1 day (P1) rats to systemic hypoxia. The rats were intraperitoneally injected with normal saline (Hy group) or minocycline (Hy + M group) 2 h after hypoxia exposure.

View Article and Find Full Text PDF

Soil clays (< 2,000 nm) (SC) and soil nanoclays (< 100 nm) (SNC) were used as adsorbents for removal of Cu(II) from aqueous solution. The experiments were conducted with variables including pH, interaction time, concentration of Cu(II) and temperature. Four kinetic models have been employed to investigate adsorption mechanisms, and the experimental data more closely resemble a second-order process of the kinetic model.

View Article and Find Full Text PDF

Studies of heavy metal contamination and ecological risk in estuaries are an important emerging area of environmental science. However, there have been few detailed studies of heavy metal contamination that concern the spatial variation of heavy metal levels in water, sediment, and oyster tissue. Because of the effective uptake of heavy metals, cultured oysters are a cheap and effective subject for study.

View Article and Find Full Text PDF

We report the discovery in Lake Cuitzeo in central Mexico of a black, carbon-rich, lacustrine layer, containing nanodiamonds, microspherules, and other unusual materials that date to the early Younger Dryas and are interpreted to result from an extraterrestrial impact. These proxies were found in a 27-m-long core as part of an interdisciplinary effort to extract a paleoclimate record back through the previous interglacial. Our attention focused early on an anomalous, 10-cm-thick, carbon-rich layer at a depth of 2.

View Article and Find Full Text PDF

Objective: To assess the efficacy and safety of the 308 nm excimer laser for the treatment of vitiligo.

Methods: We treated 170 patients with stable vitiligo by using the 308 nm excimer laser. The lesions of vitiligo were treated one to two times per week for 10-30 times.

View Article and Find Full Text PDF

By proposing a improved Chou's pseudo amino acid composition approach to extract the features of the sequences, a powerful predictor based on k-nearest neighbor was introduced to identify the types of lipases according to their sequences. To avoid redundancy and bias, demonstrations were performed on a dataset where none of the proteins has > or =25% sequence identity to any other. The overall success rate thus obtained by the 10-fold cross-validation test was over 90%, indicating that the improved Chou's pseudo amino acid composition might be a useful tool for extracting the features of protein sequences, or at lease can play a complementary role to many of the other existing approaches.

View Article and Find Full Text PDF

Cerebral ischemia induces kainate receptor glutamate receptor 6 (GluR6) binding to the postsynaptic density protein 95 (PSD95), which in turn anchors mixed lineage kinase 3 (MLK3) via SH3 domain in rat brain. MLK3 subsequently activates c-Jun NH(2)-terminal kinase (JNK) via MAP kinase kinases (MKKs). In this study, we investigated the association of PSD95 with GluR6 and MLK3, the autophosphorylation of MLK3, the combination of MLK3 with JNK3, and the phosphorylation of JNK3 during cerebral ischemia in rat hippocampus CA1.

View Article and Find Full Text PDF

Objective: To evaluate the effectiveness and safety of long-pulsed Alexandrite laser for hair removal.

Methods: Hair removal was performed in 1702 hirsute patients with long-pulsed Alexandrite laser. Among them 1603 patients received two or more operations.

View Article and Find Full Text PDF

Objective: To evaluate the efficacy and safety of 585 nm flashlamp-pumped pulsed dye lasers (PDL) in the treatment of port-wine stains (PWS).

Methods: A retrospective review was performed in 2 317 patients with PWS who visited the Dermatology Laser Centre of PUMC Hospital and accepted treatment with 585 nm PDL. The correlation between the treatment efficacy and the treatment sessions, lesion types, and usage of other therapies were analyzed.

View Article and Find Full Text PDF

Objective: To evaluate the clinical efficacy and safety of Q-switched Alexandrite laser in the treatment of pigmentary skin, diseases ( PSDs).

Methods: Totally 4 656 patients with PSDs were treated with Q-switched Alexandrite laser. These PDSs included nevus of Ota, seborrheic keratosis, tattoo, naevus fusco-caeruleus zygomaticus, cafe-au-lait-spots, lentigo, naevus of Ito, and spilus naevus.

View Article and Find Full Text PDF

Over-activation of ionotropic glutamate receptors can cause an excessive influx of calcium ions into neurons, which subsequently triggers the degeneration and death of cells in a process known as excitotoxicity. Here, we examined the effects of modulating ionotropic glutamate receptors and L-type voltage-gated calcium channels (L-VGCC) on the expression and activation of c-Jun in hippocampus of SD rats after transient global ischemia. The total protein of c-Jun was altered by ischemia-reperfusion and reached its high levels at 3-6 h of reperfusion.

View Article and Find Full Text PDF