OBJECTIVES: To investigate the role and mechanism of copper overload-mediated endoplasmic reticulum stress (ERS) in vascular endothelial injury in Kawasaki disease (KD). METHODS: Four-week-old male C57BL/6 mice were randomly divided into four groups: control, KD, KD plus copper chelator tetrathiomolybdate (TTM), and KD plus ERS inhibitor AMG PERK 44 (AMG) (n=20 per group). A KD mouse model was established using Candida albicans extract. Human umbilical vein endothelial cells (HUVECs) were divided into control (intervention with healthy children's serum), KD (intervention with KD patients' serum), and KD+TTM (intervention with KD patients' serum plus 20 µmol/L TTM). Copper deposition in mouse heart tissue was assessed using rubeanic acid staining. Vascular pathological changes were observed using hematoxylin-eosin staining and measurement of abdominal aortic diameter and area. ERS activation was detected by transmission electron microscopy and immunofluorescence. HUVEC viability, apoptosis, and functional changes were evaluated using CCK8, flow cytometry, cell scratch assay, and angiogenesis experiments. ERS marker protein expression levels were measured by Western blot. RESULTS: Compared to the KD group, the KD+TTM and KD+AMG groups showed reduced copper deposition in the vascular wall, decreased swelling of coronary endothelial cells and endoplasmic reticulum, reduced inflammatory cell infiltration, and less abdominal aortic lesion expansion. The abdominal aortic diameter and area, and the fluorescence intensity of ERS marker proteins (GRP78 and CHOP) were significantly lower (P<0.05). Compared to the KD group, the KD+TTM group exhibited increased cell viability, tube number, and scratch healing rate, along with decreased apoptosis rate and expression of ERS marker proteins (GRP78, CHOP, ATF6, and p-PERK) (P<0.05). CONCLUSIONS Copper overload aggravates vascular endothelial injury in KD by activating the ERS pathway. TTM can exert protective effects on the endothelium by regulating copper metabolism and inhibiting the ERS pathway.
Endoplasmic Reticulum Stress ; Copper/toxicity* ; Male ; Mucocutaneous Lymph Node Syndrome/metabolism* ; Animals ; Humans ; Endoplasmic Reticulum Chaperone BiP ; Mice, Inbred C57BL ; Mice ; Human Umbilical Vein Endothelial Cells ; Apoptosis ; Endothelium, Vascular/injuries*

With the rapid development of generative artificial intelligence(GAI)technologies,their widespread application in academic research and writing is continuously expanding the boundaries of sci-entific inquiry.However,this trend has also raised a series of ethical and regulatory challenges,inclu-ding issues related to authorship,content authenticity,citation accuracy,and accountability.In light of the growing involvement of AI in generating academic content,establishing an open,controllable,and trustworthy ethical governance framework has become a key task for safeguarding research integrity and maintaining trust within the academic community.This expert consensus outlines ethical requirements across key stages of AI-assisted academic writing-including topic selection,data management,citation practices,and authorship attribution.It aims to clarify the boundaries and ethical obligations surrounding AI use in academic writing,ensuring that technological tools enhance efficiency without compromising in-tegrity.The goal is to provide guidance and institutional support for building a responsible and sustainable research ecosystem.

With the rapid development of generative artificial intelligence(GAI)technologies,their widespread application in academic research and writing is continuously expanding the boundaries of sci-entific inquiry.However,this trend has also raised a series of ethical and regulatory challenges,inclu-ding issues related to authorship,content authenticity,citation accuracy,and accountability.In light of the growing involvement of AI in generating academic content,establishing an open,controllable,and trustworthy ethical governance framework has become a key task for safeguarding research integrity and maintaining trust within the academic community.This expert consensus outlines ethical requirements across key stages of AI-assisted academic writing-including topic selection,data management,citation practices,and authorship attribution.It aims to clarify the boundaries and ethical obligations surrounding AI use in academic writing,ensuring that technological tools enhance efficiency without compromising in-tegrity.The goal is to provide guidance and institutional support for building a responsible and sustainable research ecosystem.

A new cadinane-type sesquiterpenoid, pogocablene P (1), and a new natural product with cyclohexanone skeleton, pogocablone A (2), were isolated from the EtOAc soluble fraction of the aerial parts of Pogostemon cablin by several chromatographic methods, such as silica gel, Sephadex LH-20, ODS and high performance liquid chromatography (HPLC), and so on. Their structures were identified by means of mass spectrometry and nuclear magnetic resonance spectroscopy. In addition, the absolute configuration of compound 2 was determined by electronic circular dichroism (ECD) calculation. Furthermore, the anti-influenza virus and anti-inflammatory activities of compounds 1 and 2 were evaluated.

COVID-19 has been prevalent for three years. The virulence of SARS-CoV-2 is weaken as it mutates continuously. However, elderly patients, especially those with underlying diseases, are still at high risk of developing severe infections. With the continuous study of the molecular structure and pathogenic mechanism of SARS-CoV-2, antiviral drugs for COVID-19 have been successively marketed, and these anti-SARS-CoV-2 drugs can effectively reduce the severe rate and mortality of elderly patients. This article reviews the mechanism, clinical medication regimens, drug interactions and adverse reactions of five small molecule antiviral drugs currently approved for marketing in China, so as to provide advice for the clinical rational use of anti-SARS-CoV-2 in the elderly.

OBJECTIVES: To study the role and mechanism of platelet-derived growth factor BB (PDGF-BB) on platelet production in Kawasaki disease (KD) mice and human megakaryocytic Dami cells through in vitro and invivo experiments. METHODS: ELISA was used to measure the expression of PDGF in the serum of 40 children with KD and 40 healthy children. C57BL/6 mice were used to establish a model of KD and were then randomly divided into a normal group, a KD group, and an imatinib group (30 mice in each group). Routine blood test was performed for each group, and the expression of PDGF-BB, megakaryocyte colony forming unit (CFU-MK), and the megakaryocyte marker CD41 were measured. CCK-8, flow cytometry, quantitative real-time PCR, and Western blot were used to analyze the role and mechanism of PDGF-BB in platelet production in Dami cells. RESULTS: PDGF-BB was highly expressed in the serum of KD children (P<0.001). The KD group had a higher expression level of PDGF-BB in serum (P<0.05) and significant increases in the expression of CFU-MK and CD41 (P<0.001), and the imatinib group had significant reductions in the expression of CFU-MK and CD41 (P<0.001). In vitro experiments showed that PDGF-BB promoted Dami cell proliferation, platelet production, mRNA expression of PDGFR-β, and protein expression of p-Akt (P<0.05). Compared with the PDGF-BB group, the combination group (PDGF-BB 25 ng/mL + imatinib 20 μmol/L) had significantly lower levels of platelet production, mRNA expression of PDGFR-β, and protein expression of p-Akt (P<0.05). CONCLUSIONS PDGF-BB may promote megakaryocyte proliferation, differentiation, and platelet production by binding to PDGFR-β and activating the PI3K/Akt pathway, and the PDGFR-β inhibitor imatinib can reduce platelet production, which provides a new strategy for the treatment of thrombocytosis in KD.
Child ; Humans ; Animals ; Mice ; Mice, Inbred C57BL ; Becaplermin ; Imatinib Mesylate/therapeutic use* ; Mucocutaneous Lymph Node Syndrome/drug therapy* ; Phosphatidylinositol 3-Kinases ; Proto-Oncogene Proteins c-akt ; Thrombocytosis/etiology* ; RNA, Messenger

Objective: To investigate the characteristics and comprehensive treatment of infected wounds in patients with iatrogenic Cushing's syndrome. Methods: A retrospective observational study was conducted. From May 2012 to December 2021, the data of 19 patients with iatrogenic Cushing's syndrome discharged from the Department of Burns and Plastic Surgery of the First Affiliated Hospital of Guangxi Medical University were collected, including 8 males and 11 females, aged 28-71 (56±11) years, with 12 cases of infected acute wounds and 7 cases of infected chronic wounds. The lesions were located in the limbs, perianal, and sacrococcygeal regions, with original infection ranging from 9 cm×5 cm to 85 cm×45 cm. After admission, the patients were performed with multidisciplinary assisted diagnosis and treatment, and the wounds were treated with debridement and vacuum sealing drainage, according to the size, severity of infection, suture tension, and bone and tendon tissue exposure of wounds, direct suture or autologous skin and/or artificial dermis and/or autologous tissue flap transplantation was selected for wound repair. The levels of cortisol and adrenocorticotropic hormone (ACTH) of patients at 8:00, 16:00, and 24:00 within 24 h after admission were counted. After admission, the number of operations, wound repair methods, and wound and skin/flap donor site healing of patients were recorded. During follow-up, the wounds were observed for recurrent infection. Results: The cortisol levels of 16 patients at 8:00, 16:00, and 24:00 within 24 h after admission were (130±54), (80±16), and (109±39) nmol/L, respectively, and ACTH levels were (7.2±2.8), (4.1±1.8), and (6.0±3.0) pg/mL, respectively; and the other 3 patients had no such statistical results. After admission, the number of surgical operation for patients was 3.4±0.9. The following methods were used for wound repair, including direct suturing in 4 cases and autologous skin and/or artificial dermis grafting in 9 cases, of which 2 cases underwent stage Ⅱ autologous skin grafting after artificial dermis grafting in stage Ⅰ, and 6 cases had pedicled retrograde island flap+autologous skin grafting. The wound healing was observed, showing that all directly sutured wounds healed well; the wounds in 6 cases of autologous skin and/or artificial dermis grafting healed well, and the wounds in 3 cases also healed well after the secondary skin grafting; the flaps in 4 cases survived well with the wounds in 2 cases with distal perforators flap arteries circumfluence obstacle of posterior leg healed after stage Ⅱ debridement and autologous skin grafting. The healing status of skin/flap donor sites was followed showing that the donor sites of medium-thickness skin grafts in the thigh of 4 cases were well healed after transplanted with autologous split-thickness grafts from scalp; the donor sites of medium-thickness skin grafts in 3 cases did not undergo split-thickness skin grafting, of which 2 cases had poor healing but healed well after secondary skin grafting 2 weeks after surgery; the donor sites of split-thickness skin grafts in the head of 2 patients healed well; and all donor sites of flaps healed well after autologous skin grafting. During follow-up of more than half a year, 3 gout patients were hospitalized again for surgical treatment due to gout stone rupture, 4 patients were hospitalized again for surgical treatment due to infection, and no recurrent infection was found in the rest of patients. Conclusions: The infected wounds in patients with iatrogenic Cushing's syndrome have poor ability to regenerate and are prone to repeated infection. Local wound treatment together with multidisciplinary comprehensive treatment should be performed to control infection and close wounds in a timely manner, so as to maximize the benefits of patients.
Adrenocorticotropic Hormone ; China ; Cushing Syndrome/surgery* ; Female ; Gout ; Humans ; Hydrocortisone ; Iatrogenic Disease ; Male ; Skin, Artificial ; Wound Infection

Objective To investigate the effects of microRNA( miR)-29a-3p on the proliferation and invasion of gastric cancer cells and analyze its related molecular mechanism. Methods The expression level of miR-29a-3p in gastric cancer cells was detected, and the role of miR-29a-3p in the proliferation, migration, and invasion of gastric cancer cells was evaluated. Western blotting and luciferase analysis showed that miR-29a-3p was directly bound to Serpinhl 3 ' -untranslated region(3' UTR). In addition, the effects of the miR-29a-3p/Serpinhl axis on the proliferation, migration, and invasion of gastric cancer cells were detected by MTT assay, colony formation assay, and Transwell assay in vitro. Results After transfection, the expression of miR-29a-3p in the miR-29a-3p mimic group was significantly higher than that in the miR-29a-3p negative control and blank group. After transfection, the proliferation of BGC823 cells decreased significantly. Luciferase analysis showed that miR-29a-3p inhibited the expression of Serpinhl by targeting the 3 ' UTR of Serpinhl. In addition, overexpression of miR-29a-3p significantly inhibited the proliferation, invasion, and migration of gastric cancer cells by targeting Serpinhl. Conclusion MiR-29a-3p can target Serpinhl and regulate the proliferation and invasion of gastric cancer cells.

Objective: Although benzene is a confirmed environmental carcinogen, the mechanism of its carcinogenicity remains largely unclear. The suggested oncogene, miR-221, is elevated and plays important roles in various tumors, but its role in benzene-induced carcinogenesis remains unknown. Methods: In the present study, we constructed hydroquinone (HQ, a representative metabolite of benzene with biological activity)-transformed malignant cell line (16HBE-t) and analyzed the level of miR-221 in it with qRT-PCR. Exosomes from 16HBE-t cells incubated with or without an miR-221 inhibitor were isolated by ultracentrifugation, characterized by transmission electron microscopy and laser scanning confocal microscope, and then transfected into 16HBE cells. The effects of exosomal miR-221 on apoptosis induced by HQ in recipient cells were determined using flow cytometry. Results: The amount of miR-221 in 16HBE-t was significantly increased compared with controls. When recipient cells ingested exosomes derived from 16HBE-t, miR-221 was increased, and apoptosis induced by HQ was inhibited. Blocking miR-221 in 16HBE-t using an inhibitor did not significantly alter miR-221 or apoptosis in recipient cells. Conclusion Exosomal miR-221 secreted by 16HBE-t inhibits apoptosis induced by HQ in normal recipient cells.
Apoptosis ; Bronchi/cytology* ; Cell Line, Transformed ; Epithelial Cells ; Exosomes ; Humans ; Hydroquinones ; MicroRNAs

Objective: To explore the effect of perioperative airway management based on the concept of enhanced recovery after surgery (ERAS) on the improvement of preoperative pulmonary function in patients with aspirin intolerance triad (AIT). Methods: Thirty patients with AIT (including 13 males and 17 females, aged from 29 to 75 years old) for sinus surgery from January 2018 to December 2019 were selected, 172 patients (including 105 males and 67 females, aged from 17 to 83 years old) with chronic rhinosinusitis with nasal polyps (CRSwNP) without lower airway disease were selected by random number table at the same period, and their clinical data and preoperative pulmonary function were analyzed and compared retrospectively. FEV₁%pred<80% after bronchodilation test was considered as high risk for surgery. Preoperative evaluation and standardized drug intervention were applied in patients with pulmonary function abnormalities at risk for surgery, and improvement of preoperative pulmonary function and tolerability to general anesthesia surgery in the two groups were evaluated. All the statistical analyses were conducted using SPSS 22.0. Results: The main pulmonary function indexes (FEV₁%pred, FEV₁/FVC%pred, FEF₅₀%pred, FEF₇₅%pred, MMEF%pred) in AIT group decreased significantly than those in CRSwNP group (t values were 10.882, 10.506, 9.141, 10.182, 9.099, respectively, all P<0.001). At admission 86.7% (26/30) patients in the AIT group and 11.6% (20/172) patients in CRSwNP group had high surgical risk for lung function, with significantly difference (χ² = 81.788, P<0.05); after 3 days with individualized drug intervention, 57.7% (15/26) patients in AIT group reached the standard for surgery, which was significantly less than 90.0% (18/20) patients in CRSwNP group (χ²=4.335,P<0.05); and after 6 days with drug intervention, the patients who reached the standard for surgery in pulmonary function accounted for 92.3% (24/26) in the AIT group and 100% (20/20) in the CRSwNP group. FEV₁%pred in the two groups before surgery were significantly improved compared with those at admission respectively ((90.00±6.32)% vs. (64.79±13.60)%,t value was 10.110 in AIT group; (91.65±11.86)% vs. (76.40±9.35)%, t value was 9.346 in CRSwNP group; all P<0.05), and also FEV₁/FVC%pred, FEF₅₀%pred, FEF₇₅%pred and MMEF%pred were all significantly improved (all P<0.05). Surgery was completed successfully in the two groups of patients with lung function meeting the surgical standard, and no intraoperative or postoperative airway adverse events occurred. Conclusion: AIT patients have high airway risk for sinus surgery due to poor pulmonary function. Standardized airway management based on the concept of ERAS can improve the pulmonary function of patients, and decrease the incidence of perioperative airway adverse events.
Adolescent ; Adult ; Aged ; Aged, 80 and over ; Airway Management ; Aspirin ; Enhanced Recovery After Surgery ; Female ; Humans ; Lung/surgery* ; Male ; Middle Aged ; Retrospective Studies ; Young Adult