[Pay close attention to the current characteristics and development trend of severe acute hepatitis with unknown etiology in children worldwide]

In the past, acute hepatitis of unknown etiology in children was sporadic. However, during the last three weeks, there has been a trend of short-term outbreak around the world. As of May 3, 2022, at least 228 cases had been reported in about 20 countries and regions. The main clinical manifestations of the children included abdominal pain, diarrhea, vomiting, jaundice, and hepatomegaly. The liver functions including alanine aminotransferase and total bilirubin increased sharply. About 8.8% of the children needed liver transplantation. The etiology is not clear, but adenovirus type 41 is currently considered to be the most likely cause. Clinicians should keep alert to acute hepatitis of unknown etiology in children, strengthen epidemic surveillance, clinical treatment, and carry out necessary health education.

A Series of Genes for Predicting Responses to Anti-Tumor Necrosis Factor α Therapy in Crohn's Disease

Background: Patients with Crohn’s disease (CD) experience severely reduced quality of life, particularly those who do not respond to conventional therapies. Antitumor necrosis factor (TNF)α is commonly used as first-line therapy; however, many patients remain unresponsive to this treatment, and the identification of response predictors could facilitate the improvement of therapeutic strategies.

Methods: We screened Gene Expression Omnibus (GEO) microarray cohorts with different anti-TNFα responses in patients with CD (discovery cohort) and explored the hub genes. The finding was confirmed in independent validation cohorts, and multiple algorithms and in vitro cellular models were performed to further validate the core predictor.

Results: We screened four discovery datasets. Differentially expressed genes between anti-TNFα responders and nonresponders were confirmed in each cohort. Gene ontology enrichment revealed that innate immunity was involved in the anti-TNFα response in patients with CD. Prediction analysis of microarrays provided the minimum misclassification of genes, and the constructed network containing the hub genes supported the core status of TLR2. Furthermore, GSEA also supports TLR2 as the core predictor. The top hub genes were then validated in the validation cohort (GSE159034; p < 0.05). Furthermore, ROC analyses demonstrated the significant predictive value of TLR2 (AUC: 0.829), TREM1 (AUC: 0.844), and CXCR1 (AUC: 0.841). Moreover, TLR2 expression in monocytes affected the immune–epithelial inflammatory response and epithelial barrier during lipopolysaccharide-induced inflammation (p < 0.05).

Conclusion: Bioinformatics and experimental research identified TLR2, TREM1, CXCR1, FPR1, and FPR2 as promising candidates for predicting the anti-TNFα response in patients with Crohn’s disease and especially TLR2 as a core predictor.

[Effect of human decidua mesenchymal stem cells-derived exosomes on the function of high glucose-induced senescent human dermal fibroblasts and its possible mechanism]

Objective: To establish a high glucose senescent model of human dermal fibroblasts (HDFs), and to investigate the effects of exosomes derived from human decidua mesenchymal stem cells (dMSCs) on the proliferation, migration, and apoptosis of senescent HDFs and possible mechanism. Methods: The experimental research method was used. From January to March 2021, discarded foreskin tissue was collected for isolation and culture of primary HDFs from 4 male phimosis patients (aged 18-22 years) admitted for circumcision in the Fourth Medical Center of the PLA General Hospital. The 6th passage of HDFs were taken and divided into low glucose group and high glucose group according to the random number table, and subsequently cultured in low-glucose complete medium and high-glucose complete medium, respectively, with medium changed every 72 h without subculturing. After 10 days of culture, the cells were taken and measured for cellular senescence using the β-galactosidase kit at 24 h after seeding; the expression of senescence-related proteins p16 and p53 was assessed by Western blotting at 48 h after seeding; cell proliferation was detected at 24, 48, and 72 h after seeding using the cell counting kit 8 (CCK-8) method; the cell proliferation was evaluated by 5-ethynyl-2'-deoxyuridine (EdU) staining method, cell cycle and apoptosis were measured by flow cytometry after 48 h of seeding; Transwell experiment was used for the calculation of cell migration rate at 24 h after seeding. The human dMSCs were taken and cultured for 48-72 h from which the exosomes were extracted by differential high speed centrifugal method. The morphology of dMSC exosomes was observed by transmission electron microscopy, the particle size distribution of dMSC exosomes was measured by nanoparticle tracking analysis, and the expression of dMSC-exosomes marker proteins CD9 and tumor susceptibility gene101 (TSG101) were detected by Western blotting. The dMSC exosomes and high-glucose complete medium-induced senescent HDFs were co-cultured for 24 hours, then PKH67 kit was used to detect the uptake of exosomes by HDFs. High-glucose complete medium-induced senescent HDFs were taken and divided into high glucose alone group, high glucose+low concentration of exosomes group, and high glucose+high concentration of exosomes group according to the same method above. The high-glucose complete medium with equal volume of phosphate buffered saline, dMSC exosomes with final concentration of 50 μg/mL, and dMSC exosomes with final concentration of 100 μg/mL were added to the corresponding groups for conventional cell culture, respectively. After grouped, the cell proliferation, cell cycle and apoptosis as well as cell migration were detected by CCK-8 method and EdU staining method, flow cytometry, and Transwell experiment at the corresponding time points as before, respectively. Based on the previous results, high-glucose complete medium-induced senescent HDFs were taken and divided into high glucose alone group and high glucose+high concentration of exosomes group for the same treatment. After being grouped and cultured for 48 h, real-time fluorescent quantitative polymerase chain reaction was used to evaluate the mRNA expression of senescent-related microRNA (miR)-145-5p, miR-498, miR-503-5p, calcium/calmodulin dependent protein kinase 1D (CAMK1D), phosphates and tensin homologue deleted on chromosome ten (PTEN) gene, and Cyclin D1 in high glucose alone group and high glucose+high concentration of exosomes group. Data were statistically analyzed with analysis of variance for factorial design, one-way analysis of variance, least significant difference t test, and independent sample t test. Results: At 24 h after seeding, the rate of β-galactosidase-positive staining of HDF in high glucose group was (38.4±4.2)%, which was significantly higher than (16.5±2.2)% of low glucose group (t=4.65, P<0.01). At 48 h after seeding, the expression levels of senescence-related proteins p16 and p53 both were significantly higher in HDFs of high glucose group than those in low glucose group (with t values of 11.85 and 3.02, respectively, P<0.05 or P<0.01). At 0, 24, 48, and 72 h after seeding, the cell proliferation viability of HDFs in high glucose group was all significantly lower than in low glucose group (with t values of 4.13, 9.90, and 15.12, respectively, P<0.01). At 48 h after seeding, the rate of EdU-positive staining of HDFs in high glucose group was obviously lower than that of low glucose group (t=3.83, P<0.05). At 48 h after seeding, the percentage of G2/M+S subpopulations in three subpopulations (G0/G1, S, and G2/M) of HDF cycle was significantly lower in high glucose group than that in low glucose group (t=8.74, P<0.01). At 24 h after seeding, the number of HDFs migrated through the filter membrane to the lower chamber was 37±6 in high glucose group, which was significantly less than 74±7 in low glucose group (t=8.42, P<0.01). At 48 h after seeding, the HDF apoptosis rate was significantly higher in high glucose group than in low glucose group (t=8.48, P<0.01). The dMSC exosomes were cup-shaped or round vesicles with well-defined edges and uniform size distribution. The size of dMSC exosomes was basically in the range of 80-200 nm. Exosomal markers including CD9 and TSG101 were positively presented on the dMSC exosomes. After being co-cultured for 24 hours, the dMSC exosomes were taken up intracellularly by HDFs and mainly distributed around the nucleus of HDFs. After being grouped and cultured for 24, 48, and 72 h, the HDF proliferation viabilities in high glucose+low concentration of exosomes group and high glucose+high concentration of exosomes group were both significantly higher than in high glucose alone group (with t values of 6.36, 6.10, 7.76, 8.92, 12.17, and 10.74, respectively, P<0.01), the HDF proliferation viability in high glucose+high concentration of exosomes group was significantly higher than in high glucose+low concentration of exosomes group (with t values of 7.92, 4.82, and 4.72, respectively, P<0.01). After being grouped and cultured for 48 h, the percentages of EdU-positive HDFs in high glucose+low concentration of exosomes group and high glucose+high concentration of exosomes group were both significantly higher than in high glucose alone group (with t values of 5.32 and 9.88, respectively, P<0.01), the percentage of EdU-positive HDFs in high glucose+high concentration of exosomes group was notably higher than in high glucose+low concentration of exosomes group (t=5.27, P<0.01). After being grouped and cultured for 48 h, the proportion of G0/G1 subpopulation in both high glucose+low concentration of exosomes group and high glucose+high concentration of exosomes group was distinctly lower (with t values of 3.81 and 4.31, respectively, P<0.05), while the proportion of G2/M+S subpopulation was markedly higher (with t values of 3.81, 4.31, respectively, P<0.05) than in high glucose alone group. After being grouped and cultured for 24 h, the number of HDFs migrated through the filter membrane in both high glucose+low concentration of exosomes group and high glucose+high concentration of exosomes group was significantly higher than in high glucose alone group (with t values of 10.14 and 13.39, respectively, P<0.01), the number of HDFs migrated through the filter membrane in high glucose+high concentration of exosomes group was significantly increased than in high glucose+low concentration of exosomes group (t=6.27, P<0.01). After being grouped and cultured for 48 h, the HDF apoptosis rates in high glucose+low concentration of exosomes group and high glucose+high concentration of exosomes group were both significantly lower than in high glucose alone group (with t values of 3.72 and 5.53, respectively, P<0.05 or P<0.01). After being grouped and cultured for 48 h, compared with those in high glucose alone group, the mRNA expression levels of miR-145-5p and miR-498 were both obviously higher (with t values of 13.03 and 8.90, respectively, P<0.01), while the mRNA expression level of miR-503-5p was significantly lower (t=3.85, P<0.05) in high glucose+high concentration of exosomes group. After being grouped and cultured for 48 h, compared with those in high glucose alone group, the mRNA expression levels of CAMK1D and PTEN gene were both significantly lower (with t values of 8.83 and 5.97, respectively, P<0.01), while the mRNA expression level of Cyclin D1 was significantly higher in high glucose+high concentration of exosomes group (t=4.03, P<0.05). Conclusions: The dMSC exosomes are capable of improving cell proliferation and migration, and inhibiting cell apoptosis of high-glucose senescent HDFs. This may be related to the mechanism by which the increased expressions of intracellular miR-145-5p and miR-498 inhibit the expression of CAMK1D and PTEN gene, and the decreased expression of miR-503-5p promote the expression of Cyclin D1.

Circle RNA circCSPP1 promotes human osteosarcoma cell proliferation and increases glucose metabolism by suppressing miR-200c maturation

INTRODUCTION

MiR-200c plays a central role in glucose metabolism in cancer cells. However, its upstream regulators in this process are unknown. CircRNA CSPP1 (circCSPP1) was predicted to bind to premature miR-200c, an oncogenic miRNA. Therefore, we explored their interaction in osteosarcoma (OS).

METHODS

Differential circCSPP1 and miR-200c expression in OS was analyzed using RT-qPCR. Glucose metabolism was analyzed by glucose uptake assay. Subcellular circCSPP1 location in OS cells was detected using cellular fractionation assay. The direct interaction between circCSPP1 and miR-200c was explored using RNA-RNA pull-down assay. The role of circCSPP1 in miR-200c maturation was investigated by analyzing both mature and premature miR-200c levels in OS cells with circCSPP1 overexpression.

RESULTS

CircCSPP1 and premature miR-200c levels were increased while mature miR-200c level was decreased in OS. CircCSPP1 was detected in both the nuclear and cytoplasm fractions of OS cells. CircCSPP1 directly interacted with premature miR-200c. CircCSPP1 overexpression increased premature miR-200c level, glucose uptake, and cell proliferation, but decreased mature miR-200c level. MiR-200c overexpression suppressed the role of circCSPP1 in OS cells.

CONCLUSIONS

CircCSPP1 promotes OS cell proliferation and increases glucose metabolism by suppressing miR-200c maturation.

Roseburia intestinalis: A Beneficial Gut Organism From the Discoveries in Genus and Species

Roseburia intestinalis is an anaerobic, Gram-positive, slightly curved rod-shaped flagellated bacterium that produces butyrate in the colon. R. intestinalis has been shown to prevent intestinal inflammation and maintain energy homeostasis by producing metabolites. Evidence shows that this bacterium contributes to various diseases, such as inflammatory bowel disease, type 2 diabetes mellitus, antiphospholipid syndrome, and atherosclerosis. This review reveals the potential therapeutic role of R. intestinalis in human diseases. Patients with inflammatory bowel disease exhibit significant changes in R. intestinalis abundance, and they may benefit a lot from modulations targeting R. intestinalis. The data reviewed here demonstrate that R. intestinalis plays its role in regulating barrier homeostasis, immune cells, and cytokine release through its metabolite butyrate, flagellin and other. Recent advancements in the application of primary culture technology, culture omics, single-cell sequencing, and metabonomics technology have improved research on Roseburia and revealed the benefits of this bacterium in human health and disease treatment.

[Clinical efficacy of bulleyaconitine A combined with gabapentin on postherpetic neuralgia]

Objective: To investigate the analgesic efficacy and safety of state-dependent sodium channel blocker-bulleyaconitine combined with calcium channel blocker-gabapentin on postherpetic neuralgia (PHN). Methods: A double-blind, randomized, placebo-controlled, parallel-group, multi-center study involving Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Qinghai Provincial People's Hospital, Yueyang Hospital of Integrated Traditional Chinese and Western Medicine Affiliated to Shanghai University of Traditional Chinese Medicine, the Second Affiliated Hospital of Kunming Medical University was performed from September 2018 to December 2019. A total of 75 PHN patients were randomly divided into the experiment group (n=41) and the control group (n=34). On the basis of first-line treatment with gabapentin, the experiment group was given bulleyaconitine A tablets, while the control group was given placebo. The primary outcome was a 50% improvement in the visual analogue scale (VAS), and the effective rate of achieving the primary outcome between the two groups was compared; the Cox regression model was used to analyze the impact of related factors on the disease outcome. Secondary outcomes including scores of pain scales (ID-pain, DN4), Patient Health Questionnaire (PHQ-9), 7-item Generalized Anxiety Disorder (GAD-7) at 1, 2, 3, 4, 8, 12 weeks after treatment were applied to evaluate the efficacy and safety of the combination of bulleyaconitine A tablets with first-line drug in the treatment of PHN. Results: The effective rate was 68.3% (28/41) and the time reached the primary outcome was 28 (7, 84) days in the experiment group, while in the control group, the effective rate was 52.9% (18/34) and the time reached the primary outcome was 56 (14, 84) days. Cox regression analysis indicated that the grouping factor of oral bulleyaconitine A tablets was an independent factor for improving the outcome of PHN (HR=2.063, 95%CI: 1.059-4.018, P<0.05), and the probability of the experiment group reaching the primary outcome was 2.063 times that of the control group (P<0.05). Meanwhile, the outcome probability of the long disease course group (>6 months) was only 0.201 times that of the short disease course group (<6 months) (HR=0.201, 95%CI: 0.073-0.551, P<0.05). There was no statistically significant difference in the trend of VAS between the two groups (P>0.05). The scores of ID-pain, DN4, PHQ-9, and GAD-7 of the two groups were significantly improved compared with those before enrollment (P<0.05), but the differences between the two groups were not statistically significant (all P>0.05). Conclusion: Bulleyaconitine A tablet can promote the therapeutic efficacy of gabapentin, and improve the outcome of PHN in a short period of 3 months.

[1-deoxynojirimycin alleviates liver fibrosis induced by type 2 diabetes in mice]

OBJECTIVE

To investigate the effect of 1-deoxynojirimycin (DNJ) for improving diabetic liver fibrosis and explore the underlying mechanism.

METHODS

Mouse models of type 2 diabetes were established in 10 Kunming mice by high-fat diet feeding for 8 weeks and intraperitoneal injection of STZ, with 5 mice receiving intraperitoneal injection of citrate buffer solution with normal feeding as the control group. The mouse models were randomized into two groups (n=5) for further highfat feeding (model group) and additional treatment with 10% DNJ in drinking water (200 mg · kg^-1 per day; DNJ group) for 8 weeks. The mice were monitored for changes in body weight (BW), blood glucose, serum total cholesterol (TC), triglyceride (TG) and superoxide dismutase (SOD) levels. The pathological changes in the liver tissue were observed using HE and Sirius Red staining, and the solubility of collagens in the liver tissues was determined. The expression levels of MCP-1, TNF-α, IL-1β and TGF-β1 mRNA were detected with real-time PCR, and the protein expressions of α-SMA and collagen2 (ColA2) were determined with Western blotting. In the in vitro experiment, mouse fibroblasts L929 cells were pretreated with DNJ (10 μg/ mL) or PBS for 30 min followed by culture in high-glucose medium for 24 h, and the level of ROS production was measured using dihydroethidium (DHE) staining.

RESULTS

In the mouse model of type 2 diabetes, DNJ treatment significantly lowered serum level of glucose, TC, and TG (P < 0.05) and increased serum SOD activity (P < 0.05). DNJ obviously attenuated liver fibrosis in the diabetic mice, as shown by alleviated cross-linking of collagens and reduced contents of pepsin-solubilized collagen (PSC) and total collagen (P < 0.05). DNJ treatment also significantly reduced the overexpression of the proinflammatory cytokines and fibrosis-related cytokines induced by diabetes (P < 0.05). In L929 cells exposed to high glucose, pretreatment with DNJ significantly lowered the intensity of red fluorescence in DHE staining.

CONCLUSION

DNJ can attenuate type 2 diabetes-induced liver fibrosis in mice through its hypoglycemic, anti-inflammatory and anti-oxidative effects.

Correlation Between Sleep, Life, Mood, and Diet and Severity of Inflammatory Bowel Disease in China: A Retrospective Study

Background

The aim of the present study was to assess the relationship between inflammatory bowel disease (IBD) and quality of sleep, quality of life (QoL), mental health, and dietary intake to identify potential risk factors for IBD.

Material/Methods

This was a retrospective analysis from September 2019 to August 2020. We enrolled 71 patients with IBD aged 14 to 69 years who completed the IBD-Life Habits Questionnaire, which included data on demographics, environmental factors, and dietary habits; the Pittsburgh Sleep Quality Index (PSQI); Patient Health Questionnaire (PHQ-9); Generalized Anxiety Disorder-7 (GAD-7); and the Inflammatory Bowel Disease Questionnaire (IBDQ). Of the patients, 46 had IBD that was in remission and in 25 the disease was active, based on scores used to assess clinical symptoms. The Crohn’s Disease Activity Index (CDAI) and the Partial Mayo Score were used for Crohn disease (CD) and ulcerative colitis (UC), respectively.

The patients were divided into 2 groups, based on disease status: remission (CDAI <150 or Mayo Score=0) and active (CDAI ≥150 or Mayo Score >0). Because sleep and dietary habits in the patients with UC and CD were not significantly different, the 2 groups of patients were eventually combined into a single IBD group. The IBD-Life Habits Questionnaire, except for IBDQ, was completed by 68 age- and sex-matched healthy controls.

Results

Scores for PSQI (P=.001), PHQ-9 (P=.003), GAD-7 (P=.007), and IBDQ (P=.001) were significantly higher in the patients with active IBD. An IBDQ score >168.0 (PSQI score >7.5) indicates a clinically active state of IBD with a sensitivity of 84.8% (72.0%) and a specificity of 88.0% (82.6%). Diet composition was not related to disease activity. An analysis of patients and controls showed that lack of siblings could be a protective factor for onset of IBD (OR 0.300, 95% CI 0.119–0.785), while not being breastfed (OR 2.753, 95% CI 1.025–7.396) and consuming spicy foods could be risk factors for onset of IBD (OR 2.186, 95% CI 1.370–3.488).

Conclusions

In patients with IBD, poor sleep quality, poor QoL, depression, and anxiety were related to having active disease, whereas diet was not. Attempting to control dietary composition in patients with IBD may not be effective in preventing disease flare, but attention should be paid to intake of spicy foods.

[Analysis of diagnosis, treatment and risk classification of blunt thoracic aortic injury]

Objective: Propose a new risk classification system for blunt thoracic aortic injury and explore its treatment strategies. Methods: After the retrospective analysis of clinical data from 68 patients with blunt thoracic aortic injury in the First Affiliated Hospital of Zhengzhou University from November 2016 to October 2020, there were 56 males and 12 females, among these patients, the median age was 45(21-69). According to the degree of aortic injury and the combined injury, the patients were scored for aortic injury, and the risk of the patients were graded into following three types: low-risk group (score ≤ 2 points) 12 cases, intermediate-risk group (3 points ≤ score ≤ 5 points) 41 cases, high-risk group (score ≥ 6 points) 15 cases. Analyzing the effects of treatments received by patients in different grades on the prognosis. Patients were followed up through hospitalization or outpatient clinics at 1, 3, 6, 12 months after surgery and every year thereafter. Results: Of the 68 patients, 21 received non-surgical treatment and 47 received surgical repair, including 6 open surgery and 41 thoracic aortic endovascular repair. There were 16 cases of emergency operation and 31 cases of delayed operation. Twelve low-risk patients were treated with non-surgical treatment, and only 1 patient died of lung infection, with a mortality rate of 8.3% (1/12). There were 8 deaths in 41 moderate-risk patients, with a mortality rate of 19.5% (8/41), and the aortic-related mortality rate was 9.8% (4/41), and the operative mortality rate was 10.8% (4/37). The total mortality of 15 high-risk patients was 40% (6/15), and the aortic-related mortality rate was 30.0% (5/15), and the mortality rate of surgical patients was 10% (1/10). During the follow-up period of 5 to 52 months, no deaths occurred outside the hospital. According to the risk grading, there were significant differences in the aortic-related mortality of each grade (χ²=7.840, P=0.020). During the follow-up of 5-52 months, 1 case had type Ⅰ endoleak, 1 case of cerebral infarction, and 1 case of acute renal failure. Conclusion: According to the patient's degree of aortic injury and combined injury, the risk classification helps to choose the appropriate treatment.

LncRNA NEAT1 mediates intestinal inflammation by regulating TNFRSF1B

Background

Inflammatory bowel disease (IBD) is a chronic nonspecific intestinal disease. Our previous work showed that long non-coding RNA (LncRNA) nuclear enriched abundant transcript 1 (NEAT1) plays an important role in IBD. In the current study, we aimed to explore the underlying mechanism by which NEAT1 participates in the development of the disease.

Methods

Real-time quantitative polymerase chain reaction (RT-qPCR) and western blotting were used to detect the expression of NEAT1 and tumor necrosis factor superfamily member 1B (TNFRSF1B) in clinical specimens and dextran sulfate sodium (DSS) colitis mice. Inflammatory cell models were established by stimulating human normal intestinal epithelial cell line NCM460 and human colon cancer cell line HT-29 with tumor necrosis factor alpha (TNF-α). Expressions of inflammatory cytokines such as interleukin-8 (IL-8) and monocyte chemoattractant protein-1 (MCP-1) were detected by enzyme-linked immunosorbent assay (ELISA) or RT-qPCR, TNFRSF1B, NF-κB p65 and p-NF-κB p65 followed by the knockdown or overexpression of NEAT1 and TNFRSF1B were analyzed by western blotting, and the regulatory effects of NEAT1 on TNFRSF1B were detected by RNA pull-down experiments and RNA-decay assay. The translocation of NF-κB p65 to the nucleus was detected by immunofluorescence.

Results

In patients' specimens and DSS colitis mouse models, NEAT1 and TNFRSF1B expression were up-regulated compared with the control group. TNF-α stimulation increased NEAT1 and TNFRSF1B expression and activated NF-κB signaling pathway by increasing the translocation of NF-κB p65 to the nucleus. In the presence of TNF-α stimulation, NEAT1 knockdown reduces the expression of TNFRSF1B and the translocation of NF-κB p65, thereby relieves cell inflammation. These effects can be reversed by the overexpression of TNFRSF1B.In addition, NEAT1 is involved in inflammatory response by up-regulating the mRNA levels of TNFRSF1B, and knocking down NEAT1 can alleviate inflammation by down-regulating TNFRSF1B. Moreover, NEAT1 co-precipitates TNFRSF1B mRNA in RNA-pulldown assay, and the presence of NEAT1 stabilizes the mRNA of TNFRSF1B.

Conclusions

Our results showed that LncRNA NEAT1 promotes NF-κB p65 translocation and mediates intestinal inflammation by regulating TNFRSF1B.

Fasudil protects against isoproterenol-induced myocardial infarction in mice via inhibiting Rho/ROCK signaling pathway

OBJECTIVE

Myocardial infarction (MI) is one of the most common diseases in cardiovascular medicine, and the risk of MI is very serious. Therefore, the purpose of this study was to explore the effect of fasudil on isoproterenol (ISO)-induced MI in mice.

MATERIALS AND METHODS

Forty C57BL/6 mice were divided into four groups, namely, control group, MI group, low dose fasudil and MI treatment group (low fasudil group), high dose fasudil, and MI treatment Group (high fasudil group). MI group and the fasudil group were injected subcutaneously with ISO (85 mg/kg) twice, and every 24 h MI was induced. Low-dose and high-dose fasudil groups were treated with 3 mg/kg/day and 10 mg/kg/day for 4 weeks before the injection of ISO. Cardiac function measured in the fourth week after ISO injection, and body weight and whole heart weight were weighed. Infarct area and thickness were analyzed by HE staining. Besides, the degree of myocardial damage was measured by detecting serum CK and LDH, and excised heart tissue was detected by Real Time-Polymerase Chain Reaction (PCR) and Western blot.

RESULTS

In MI group, the cardiac function was significantly decreased: the left ventricular short axis shortening rate (FS) and left ventricular ejection fraction (EF) were significantly decreased, the left ventricular volume was significantly increased, and the myocardial injury markers CK and LDH were significantly increased. In addition, fasudil treatment significantly relieved heart function after MI in a dose-dependent manner, reducing cardiomyocytes oxidative damage, inhibiting apoptosis.

CONCLUSIONS

Fasudil can reduce ISO-induced MI, reducing cardiomyocytes oxidative damage, inhibiting apoptosis by inhibiting the Rho/ROCK signaling pathway.

Accurate diagnosis of colorectal cancer based on histopathology images using artificial intelligence

BACKGROUND

Accurate and robust pathological image analysis for colorectal cancer (CRC) diagnosis is time-consuming and knowledge-intensive, but is essential for CRC patients' treatment. The current heavy workload of pathologists in clinics/hospitals may easily lead to unconscious misdiagnosis of CRC based on daily image analyses.

METHODS

Based on a state-of-the-art transfer-learned deep convolutional neural network in artificial intelligence (AI), we proposed a novel patch aggregation strategy for clinic CRC diagnosis using weakly labeled pathological whole-slide image (WSI) patches. This approach was trained and validated using an unprecedented and enormously large number of 170,099 patches, > 14,680 WSIs, from > 9631 subjects that covered diverse and representative clinical cases from multi-independent-sources across China, the USA, and Germany.

RESULTS

Our innovative AI tool consistently and nearly perfectly agreed with (average Kappa statistic 0.896) and even often better than most of the experienced expert pathologists when tested in diagnosing CRC WSIs from multicenters. The average area under the receiver operating characteristics curve (AUC) of AI was greater than that of the pathologists (0.988 vs 0.970) and achieved the best performance among the application of other AI methods to CRC diagnosis. Our AI-generated heatmap highlights the image regions of cancer tissue/cells.

CONCLUSIONS

This first-ever generalizable AI system can handle large amounts of WSIs consistently and robustly without potential bias due to fatigue commonly experienced by clinical pathologists. It will drastically alleviate the heavy clinical burden of daily pathology diagnosis and improve the treatment for CRC patients. This tool is generalizable to other cancer diagnosis based on image recognition.

[Correlation analysis of newly diagnosed coal worker's pneumoconiosis and GDP in Hubei Province from 2006 to 2015]

Objective: To analysis the distribution characteristics of coal worker's pneumoconiosis in Hubei Province during 2006-2010 (the 11th Five-Year Plan period) and 2011-2015 (the 12th Five-Year Plan period) , and its correlation with the gross domestic product (GDP) of Hubei Province from 1986 to 2015. Methods: In September 2019, the data of newly diagnosed coal worker's pneumoconiosis reported in Occupational Disease and Occupational Health Information Monitoring System from 2006 to 2015 and the GDP data from 1986 to 2015 in Hubei Province were collected. The distribution characteristics of time, region, enterprise size, industry and economic type of coal-worker's pneumoconiosis and its correlation with GDP were analyzed. Results: In 2006-2015, 3807 new cases of coal worker's pneumoconiosis were reported in Hubei Province. The time distribution generally ascended as a wave trend. The number of new cases reached its peak in 2013 (722 cases) . GDP growth continued between 1986-1995, 1996-2005 and 2006-2015, especially in 2006-2015. New cases of coal worker's pneumoconiosis were mainly distributed in Huangshi city, Yichang city and Enshi prefecture, accounting for 82.40% (3137/3807) of the total cases. The proportion of new cases in Huangshi city was higher than that in Yichang city and Enshi prefecture (χ(2)=272.66, 243.19, P<0.05) . New cases were mainly distributed in coal mining industry (3103 cases, 81.51%) , small-sized and medium (1675 cases, 44.00%) , and private enterprises (1621 cases, 42.58%) . The rank correlation (r(s)) of coal worker's pneumoconiosis in 2006-2015 with GDP in1986-1995, 1996-2005 and 2006-2015 were 0.157, 0.144, 0.200, respectively, and there were no significant differences (P>0.05) . Conclusion: The coalworker's pneumoconiosis in Hubei Province are mostly distributed in small and medium-sized private enterprises, and the regional distribution is concentrated in Huangshi city, Yichang city and Enshi prefecture. The concentration of cases is closely related to the number and energy production of local coal mines. There is no correlation between the growth of GDP and the distribution of cases.