DMAP-Catalyzed [4 + 2] Annulation of Hex-5-en-2-ynoates with Electron-Poor Alkenes.

Herein, we report a DMAP-catalyzed [4 + 2] annulation reaction of hex-5-en-2-ynoates with electron-poor alkenes , which affords exocyclic olefinic cyclohexenes in good yields and excellent regio-, diastereo-, and / selectivities. Distinguished from previous allenoate- or alkynoate-based substrates, hex-5-en-2-ynoates use the β- and ε-carbons for the bond formation, presenting new and regiodivergent C synthons for Lewis base-catalyzed annulations.

To nap or not? Evidence from a meta-analysis of cohort studies of habitual daytime napping and health outcomes.

Habitual daytime napping is a common behavioral and lifestyle practice in particular countries and is often considered part of a normal daily routine. However, recent evidence suggests that the health effects of habitual daytime napping are controversial. We systematically searched PubMed, Web of Science, Embase, and Cochrane Library databases from inception to March 9, 2024, to synthesize cohort studies of napping and health outcome risk.

Construction of C-P Bonds from Free Cyclobutanone Oximes and Chlorophosphines via Radical-Radical Coupling.

Herein, we report a catalyst-free reaction of cyclobutanone oximes with chlorophosphines (RPCl), which forms a fragile C═N-O-PR species that undergoes N-O homolysis, fragmentation, and radical-radical coupling, leading to the formation of cyano-containing phosphine oxides in good yields. The reaction features an activation of cyclobutanone oximes for radical generation, in which RPCl plays a dual role as both an activator and a reactant.

Melanoma differentiation-associated protein 5 prevents cardiac hypertrophy via apoptosis signal-regulating kinase 1-c-Jun N-terminal kinase/p38 signaling.

Pathological cardiac hypertrophy (CH) is driven by maladaptive changes in myocardial cells in response to pressure overload or other stimuli. CH has been identified as a significant risk factor for the development of various cardiovascular diseases, ultimately resulting in heart failure. Melanoma differentiation-associated protein 5 (MDA5), encoded by interferon-induced with helicase C domain 1 (IFIH1), is a cytoplasmic sensor that primarily functions as a detector of double-stranded ribonucleic acid (dsRNA) viruses in innate immune responses; however, its role in CH pathogenesis remains unclear.

Integration of untargeted and pseudotargeted metabolomics reveals specific markers for authentication and adulteration detection of Fritillariae Bulbus using tandem mass spectrometry and chemometrics.

Authentication and adulteration detection of closely related herbal medicines is a thorny issue in the quality control and market standardization of traditional Chinese medicine. Taking Fritillariae Bulbus (FB) as a case study, we herein proposed a three-step strategy that integrates mass spectrometry-based metabolomics and multivariate statistical analysis to identify specific markers, thereby accurately identifying FBs and determining the adulteration level. First, an ultra-high performance liquid chromatography-quadrupole time-of-flight mass spectrometry-based untargeted metabolomics method was employed to profile steroid alkaloids in five sorts of FB and screen potential differential markers.

Response surface methodology optimization of extraction and enrichment conditions of total triterpenoid saponins from Celosiae Semen and evaluation of its lipid-lowering activity.

The saponin-enriched extract from Celosiae Semen is a promising resource owing to its lipid-lowering activity. However, triterpenoid saponins are difficult to extract owing to their high molecular weight and strong water solubility. The aim of this paper was to explore an eco-friendly and effective technology of extraction and enrichment of total triterpenoid saponins to obtain high lipid-lowering fractions.

Development of Acridone Derivatives: Targeting Transcription in Triple-Negative Breast Cancer with Inhibitory Potential.

Breast cancer, especially the aggressive triple-negative subtype, poses a serious health threat to women. Unfortunately, effective targets are lacking, leading to a grim prognosis. Research highlights the crucial role of overexpression in this form of cancer.

Identification of Key Novel lncRNAs and that Construct ceRNA Networks Associated with Recurrence and Metastasis in Colon Cancer.

Background: Colon adenocarcinoma (COAD) is a major cause of cancer mortality worldwide. The occurrence and development of colon cancer is regulated by complex mechanisms that require further exploration. Recently, long non-coding RNAs (lncRNAs) were found to be related to the mortality of colon cancer patients through their participation in competing endogenous RNA (ceRNA) networks.

Experience of IVIG Treatment in an Overweight 14-year-old Child With Kawasaki Disease: A Case Report.

Kawasaki disease, or mucocutaneous lymph node syndrome, is an acute systemic vasculitis involving small and medium-sized vessels. It can be complicated by varying degrees of cardiac damage, especially coronary artery disease. The disease mainly occurs in children aged < 5 years, with rarer cases in older children and adults.

Visible-Light-Induced Desaturative β-Alkoxyoxalylation of N-Aryl Cyclic Amines with Difluoromethyl Bromides and HO Via a Triple Cleavage Process.

A visible-light-driven desaturative β-alkoxyoxalyation of N-aryl cyclic amines with difluoromethyl bromides and HO has been reported. This tandem reaction is triggered by homolysis of the C-Br bond to produce the difuoroalkyl radical, which undergoes the subsequent defluorinated β-alkoxyoxalylation cascades to afford a wide range of β-ketoester/ketoamides substituted enamines. The prominent feature of this reaction contains photocatalyst-free, transition-metal free, and mild conditions.

Phosphine-Catalyzed Stereoselective Ring-Opening Addition of Cyclopropenones with Nucleophiles.

A phosphine-catalyzed ring-opening addition reaction of cyclopropenones with a variety of nucleophiles (NuH), including oxygen-, nitrogen-, sulfur-, and carbon-based ones, has been investigated, which produces potentially useful α,β-unsaturated carbonyl derivatives in high yields (up to 99%), high regioselectivity, and exclusive -selectivity. The reaction proceeds in high efficiency under very mild conditions using only 1 mol % PPh as the catalyst at room temperature. The method is also amenable for the synthesis of deuterated alkenes when deuterated nucleophiles (NuD) are employed.

Ultrasonography in the evaluation of various factors of developmental dysplasia of the hip in infants: Results from a retrospective study in a large hospital of northwest China.

Background: The occurrence and development of developmental dysplasia of the hip (DDH) are related to a variety of factors, which have been reported in the literature, but the literature does not mention factors related to the severity of DDH. The purpose of this study is to analyze the related factors of the occurrence and severity of DDH in combination with the Graf ultrasonic diagnostic classification.

Methods: This study was a monocentric retrospective study describing the factors associated with DDH in a large hospital of northwest China.

A case of West syndrome and global developmental delay in a child with a heterozygous mutation in the TBL1XR1 gene: A case report.

Background: TBL1XR1, also known as IRA1 or TBLR1, encodes a protein that is localized in the nucleus and is expressed in most tissues. TBL1XR1 binds to histones H2B and H4 in vitro and functions in nuclear receptor-mediated transcription. TBL1XR1 is also involved in the regulation of the Wnt-β-catenin signaling pathway.

Congenital nephrogenic diabetes insipidus arginine vasopressin receptor 2 gene mutation at new site: A case report.

Background: Congenital nephrogenic diabetes insipidus (CNDI) is a rare hereditary disorder. It is associated with mutations in the arginine vasopressin receptor 2 (AVPR2) gene and aquaporin 2 (AQP2) gene, and approximately 270 different mutation sites have been reported for AVPR2. Therefore, new mutations and new manifestations are crucial to complement the clinical deficiencies in the diagnosis of this disease.

Myotubularin-Related Protein14 Prevents Neointima Formation and Vascular Smooth Muscle Cell Proliferation by Inhibiting Polo-Like Kinase1.

Background Restenosis is one of the main bottlenecks in restricting the further development of cardiovascular interventional therapy. New signaling molecules involved in the progress have continuously been discovered; however, the specific molecular mechanisms remain unclear. MTMR14 (myotubularin-related protein 14) is a novel phosphoinositide phosphatase that has a variety of biological functions and is involved in diverse biological processes.

E3 ubiquitin ligase RNF5 attenuates pathological cardiac hypertrophy through STING.

Ring-finger protein 5 (RNF5) is an E3 ubiquitin ligase which is expressed in a variety of human tissues. RNF5 is involved in the regulation of endoplasmic reticulum stress, inflammation, and innate immunity and plays an important role in the occurrence and development of various tumors. However, the role of RNF5 in cardiac hypertrophy has not been reported.

Baohuoside I inhibits FXR signaling pathway to interfere with bile acid homeostasis via targeting ER α degradation.

Epimedii folium (EF) is an effective herbal medicine in osteoporosis treatment, but the clinical utilization of EF has been limited due to potential hepatotoxicity. The previous studies identified that baohuoside I (BI), the main active component of EF, was relevant to EF-induced liver injury. However, the mechanisms of BI causing direct injury to hepatocytes remain unclear.

Gene cloning of a highly active phytase from Lactobacillus plantarum and further improving its catalytic activity and thermostability through protein engineering.

Phytase belongs to orthophosphate monoester hydrolase, which can catalyze the gradual hydrolysis of phytic acid to inositol phosphate. It can be added to animal feed to reduce the anti-nutritional factor of phytic acid in feed. The thermostability and specific activity of phytases are two key factors determining their potential applications.

Stent insertion for hilar cholangiocarcinoma: a meta-analysis of comparison between unilateral and bilateral stenting.

Introduction: Metal stenting can be used as a primary treatment option for alleviating malignant hilar biliary obstruction (MHBO) symptoms. Although many studies have focused on the topic of unilateral or bilateral stenting for MHBO, there is a clear need for a study comparing these two stenting types in patients with a single type of cancer.

Aim: This meta-analysis was conducted to evaluate the relative clinical efficacy of unilateral and bilateral metal stent insertion for hilar cholangiocarcinoma (HCCA).

OTUB1 alleviates NASH through inhibition of the TRAF6-ASK1 signaling pathways.

Background And Aims: NAFLD is considered as the hepatic manifestation of the metabolic syndrome, which includes insulin resistance, obesity and hyperlipidemia. NASH is a progressive stage of NAFLD with severe hepatic steatosis, hepatocyte death, inflammation, and fibrosis. Currently, no pharmacological interventions specifically tailored for NASH are approved.

[The Expression of WTAP Gene in Acute Myeloid Leukemia and Its Clinical Significance].

Objective: To investigate the expression of WTAP gene in acute myeloid leukemia (AML) and its clinical significance.

Methods: 74 acute myeloid leukemia patients with non-M3 type and 19 normal donors were selected, and real-time quantitative polymerase chain reaction was used to detect the mRNA expression level of WTAP gene in their bone marrow cells. The relationship between the mRNA expression level of WTAP gene and the clinical characteristics was analyzed.