The application value of metagenomic next-generation sequencing technology in the diagnosis and treatment of neonatal infectious meningitis - a single center retrospective case-control study.

OBJECTIVE: This retrospective study was conducted to investigate the application value of metagenomics next generation sequencing (mNGS) technology in the diagnosis and treatment of neonatal infectious meningitis. METHODS: From 1 January 2020 to 31 December 2022, 73 newborns suspected of infectious meningitis were hospitalized. After screening by inclusion and exclusion criteria, 69 newborns were subsequently included in the study, containing 27 cases with positive mNGS result and 42 cases with negative mNGS result. Furthermore, according to the diagnosis of meningitis, mNGS positive group and mNGS negative group were further divided into infectious meningitis with mNGS (+) group (n = 27) and infectious meningitis with mNGS (-) group (n = 26), respectively. RESULTS: (1) Compared with cerebrospinal fluid (CSF) culture, mNGS has better diagnostic value [positive predictive value (PPV) = 100.00% (27/27), negative predictive value (NPV) = 38.10% (16/42), agreement rate = 62.32% (43/69), area under the curve (AUC) = 0.750, 95% confidence interval (CI): 0.636-0.864]. (2) There were significant differences in the onset age, age at first CSF test, CSF leukocyte count, CSF glucose, positive rate of CSF culture, blood leukocyte count, procalcitonin (PCT), C-reaction protein (CRP), age at first mNGS test and adjusting anti-infective medication in the comparison between infectious meningitis with mNGS (+) group and infectious meningitis with mNGS (-) group (p < 0.05). (3) mNGS could help improve the cure rate [crude odds ratio (OR) = 3.393, 95%CI: 1.072-10.737; adjusted OR = 15.580, 95%CI: 2.114-114.798]. CONCLUSION: Compared with classic meningitis detection methods, mNGS has better PPV, NPV, agreement rate, and AUC. mNGS could help improve the cure rate.

Development of a Reliable GADSAH Model for Differentiating AFP-negative Hepatic Benign and Malignant Occupying Lesions.

Purpose: Developing a high-value, convenient, and validated differential diagnosis model to differentiate alpha-fetoprotein (AFP) negative hepatic occupying lesions and assist clinicians in early identification and intervention. Patients and Methods: A total of 340 patients with AFP-negative hepatic occupying lesions who were admitted to the Guangxi Medical University Cancer Hospital between August 2021 and April 2023 were included in the final retrospective analysis. The data were randomly divided into training and validation sets in a 7:3 ratio after performing multiple interpolations. In the training set, laboratory variables and models were screened using least absolute shrinkage and selection operator regression analysis, comparison of five machine learning algorithms, and univariate, as well as multivariate logistic regression analysis. A diagnostic prediction nomogram model was developed. We evaluated and validated the model using the receiver operating characteristic (ROC) curve analysis, calibration curve analysis, and decision curve analysis (DCA). Results: We identified six significant predictive factors from the results of multivariate logistic analysis in the training set and incorporated them into the nomogram model for diagnosing AFP-negative hepatic malignant occupying lesions (HMOL). The diagnostic nomogram, including gender, age, des-gamma-carboxy prothrombin (DCP), serum ferritin (SF), AFP, and hepatitis B surface antigen (HBsAg), achieved an area under the curve of 0.905 discriminated patients with HMOL from those with benign occupying lesions. Additionally, calibration curves demonstrated the close alignment between the nomogram predictions and the ideal curve, along with the consistency between predictions and actual results. Moreover, the DCA curves illustrated indicated benefit for all patients. These finding were confirmed by the validation set. Conclusion: The GADSAH model specifically targets the discrimination of malignant and benign liver lesions in AFP-negative patients. It offers a noninvasive, cost-effective, and efficient approach for diagnosing such cases.

[Mechanism of Wuling Capsules against hepatic fibrosis based on network pharmacology and animal experiments].

The present study aimed to explore the underlying mechanism of Wuling Capsules in the treatment of hepatic fibrosis(HF) through network pharmacology, molecular docking, and animal experiments. Firstly, the chemical components and targets of Wuling Capsules against HF were searched from Traditional Chinese Medicine Systems Pharmacology Database and Analysis Platform(TCMSP), Traditional Chinese Medicines Integrated Database(TCMID), GeneCards, and literature retrieval. The protein-protein interaction(PPI) network analysis was carried out on the common targets by STRING database and Cytoscape 3.9.1 software, and the core targets were screened, followed by Gene Ontology(GO) and Kyoto Encyclopedia of Genes and Genomes(KEGG) pathway enrichment analyses. Enrichment analysis was conducted on the core targets and the "drug-core component-target-pathway-disease" network was further constructed. Subsequently, molecular docking between core components and core targets was conducted using AutoDock Vina software to predict the underlying mechanism of action against HF. Finally, an HF model induced by CCl_4 was constructed in rats, and the general signs and liver tissue morphology were observed. HE and Masson staining were used to analyze the liver tissue sections. The effects of Wuling Capsules on the levels of inflammatory factors, hydroxyproline(HYP) levels, and core targets were analyzed by ELISA, RT-PCR, etc. A total of 445 chemical components of Wuling Capsules were screened, corresponding to 3 882 potential targets, intersecting with 1 240 targets of HF, and 47 core targets such as TNF, IL6, INS, and PIK3CA were screened. GO and KEGG enrichment analysis showed that the core targets mainly affected the process of cell stimulation response and metabolic regulation, involving cancer, PI3K-Akt, MAPK, and other signaling pathways. Molecular docking showed that the core components of Wuling Capsules, such as lucidenic acid K, ganoderic acid B, lucidenic acid N, saikosaponin Q2, and neocryptotanshinone, had high affinities with the core targets, such as TNF, IL6 and PIK3CA. Animal experiments showed that Wuling Capsules could reduce fat vacuole, inflammatory infiltration, and collagen deposition in rat liver, decrease the levels of inflammatory cytokines TNF-α, IL-6, and HYP, and downregulated the expressions of PI3K and Akt mRNA. This study suggests that the anti-HF effect of Wuling Capsules may be achieved by regulating the PI3K-Akt signaling pathway, reducing the levels of TNF-α and IL-6 inflammatory factors, and inhibiting the excessive deposition of collagen.

[Predictive effect of combined procalcitonin, interleukin-6 and antithrombin III on the severity and prognosis of patients with sepsis].

OBJECTIVE: To investigate the correlation of procalcitonin (PCT), interleukin-6 (IL-6) and antithrombin III (AT III) with the severity of sepsis, and to compare the predictive value of the above indicators alone or in combination. METHODS: A retrospective cohort study was conducted. Eighty-five patients with sepsis admitted to the department of intensive care medicine of Shandong Provincial Hospital Affiliated to Shandong First Medical University from April 2021 to September 2022 were enrolled. General information, sequential organ failure assessment (SOFA) score and acute physiology and chronic health evaluation II (APACHE II) score within 24 hours of admission, inflammatory indicators [PCT, IL-6, serum amyloid A (SAA), neutrophil to lymphocyte ratio (NLR), and C-reactive protein (CRP)] and coagulation indicators (D-dimer and AT III) levels at admission, and 28-day prognosis were collected. The differences of the above indicators were compared among patients with different prognosis at 28 days and different severity of sepsis. The correlation between PCT, IL-6, AT III and the severity of sepsis was analyzed by Spearman rank correlation method. Receiver operator characteristic curve (ROC curve) was drawn to evaluate the predictive value of PCT, IL-6 and AT III alone or in combination on the 28-day death of patients with sepsis. RESULTS: Eighty-five patients were enrolled finally, 67 cases survived and 18 cases died at 28 days. The mortality was 21.2%. There were no statistical significant differences in gender, age and other general data between the two groups. The patients in the death group were more serious than those in the survival group, and PCT, IL-6, and CRP levels were significantly higher than those in the survival group [PCT (µg/L): 4.34 (1.99, 14.42) vs. 1.17 (0.31, 3.94), IL-6 (ng/L): 332.40 (50.08, 590.18) vs. 61.95 (31.64, 194.20), CRP (mg/L): 149.28 (75.34, 218.60) vs. 83.23 (48.22, 174.96), all P < 0.05], and AT III activity was significantly lower than that in the survival group [(53.67±28.57)% vs. (80.96±24.18)%, P < 0.01]. However, there were no significant differences in D-dimer, NLR and SAA between the two groups. Among the 85 patients, 36 had sepsis with single organ dysfunction, 29 had sepsis with multiple organ dysfunction, and 20 had septic shock with multiple organ dysfunction. With the increase of the severity of sepsis, PCT and IL-6 levels gradually increased [PCT (µg/L): 0.36 (0.19, 1.10), 3.00 (1.22, 9.94), 4.34 (2.18, 8.86); IL-6 (ng/L): 43.99 (20.73, 111.13), 100.00 (45.37, 273.00), 332.40 (124.4, 693.65)], and the activity of AT III decreased gradually [(89.81±21.42)%, (71.97±24.88)%, and (53.50±25.41)%], all with statistically significant differences (all P < 0.01). Spearman rank correlation analysis showed that PCT and IL-6 levels in sepsis patients were significantly positively correlated with the severity of the disease (r values were 0.562 and 0.517, respectively, both P < 0.01), and AT III activity was significantly negatively correlated with the severity of the disease (r = -0.523, P < 0.01). ROC curve analysis showed that PCT, IL-6, and AT III alone or in combination had some predictive value for the death of sepsis patients at 28 days. The area under the ROC curve (AUC) of the above three indicators in combination was higher than that of the individual tests (0.818 vs. 0.722, 0.725, and 0.770), with a sensitivity of 83.3% and a specificity of 73.1%. CONCLUSIONS: PCT, IL-6, and AT III were significantly correlated with the severity of sepsis patients. The combined assay of the above three indicators can effectively improve the prediction of the prognosis of sepsis patients.

Effects of two-dimensional cyber incivility on employee well-being from a self-determination perspective.

The research attempts to explore the effects of two-dimensional cyber incivility on employee well-being. Based on self-determination theory and regulatory focus theory, we conducted two studies to examine the mediating role of intrinsic motivation and the moderating role of promotion focus between cyber incivility and emotional exhaustion. The results demonstrated that both active and passive cyber incivility predicted increased emotional exhaustion, with intrinsic motivation serving as a key mediator. There was no consistent conclusion of promotion focus's moderating role. High promotion focus might aggravate the negative effect of passive cyber incivility on intrinsic motivation. The present article provides deeper step towards understanding of cyber incivility, which also helps in the development of intervention strategies to lessen or avoid the negative impact of work-related stressful events on employee well-being.

Urinary Creatinine Concentrations and Its Explanatory Variables in General Chinese Population: Implications for Creatinine Limits and Creatinine Adjustment.

Objective: The study aimed to analyze the applicability of the World Health Organization's exclusionary guidelines for Urinary creatinine (Ucr) in the general Chinese population, and to identify Ucr related factors. Methods: We conduct a cross-sectional study using baseline data from 21,167 participants in the China National Human Biomonitoring Program. Mixed linear models and restricted cubic splines (RCS) were used to analyze the associations between explanatory variables and Ucr concentration. Results: The geometric mean and median concentrations of Ucr in the general Chinese population were 0.90 g/L and 1.01 g/L, respectively. And 9.36% samples were outside 0.3-3.0 g/L, including 7.83% below the lower limit and 1.53% above the upper limit. Middle age, male, obesity, smoking, higher frequency of red meat consumption and chronic kidney disease were associated significantly with higher concentrations of Ucr. Results of the RCS showed Ucr was positively and linearly associated with body mass index, inversely and linearly associated with systolic blood pressure, diastolic blood pressure, triglycerides level, and glomerular filtration rate, and were non-linearly associated with triiodothyronine. Conclusion: The age- and gender-specific cut-off values of Ucr that determine the validity of urine samples in the general Chinese population were recommended. To avoid introducing bias into epidemiologic associations, the potential predictors of Ucr observed in the current study should be considered when using Ucr to adjust for variations in urine dilution.

[Pulmonary hemorrhage in very low birth weight infants: risk factors and clinical outcome]. / æžä½Žå‡ºç”Ÿä½“é‡å„¿å‘ç”Ÿè‚ºå‡ºè¡€çš„å±é™©å› ç´ åŠå ¶ä¸´åºŠè½¬å½’.

OBJECTIVES: To investigate the risk factors for pulmonary hemorrhage and its clinical outcome in very low birth weight infants (VLBWIs). METHODS: The medical data were collected from all live VLBWIs (gestational age <35 weeks) who were admitted to Jiangsu Women and Children Health Hospital and Children's Hospital of Nanjing Medical University between January 1, 2020 and December 31, 2021. Based on inclusion and exclusion criteria, 574 VLBWIs were included in the study, with 44 VLBWIs in the pulmonary hemorrhage group and 530 VLBWIs in the non-pulmonary hemorrhage group. The clinical data were compared between the two groups. A multivariate logistic regression analysis was used to identify the risk factors for pulmonary hemorrhage. RESULTS: There were significant differences between the two groups in maternal age, rate of positive-pressure ventilation for resuscitation, rate of tracheal intubation for resuscitation, and minimum body temperature within 1 hour after birth (P<0.05). The pulmonary hemorrhage group had a higher proportion of VLBWIs with grade Ⅲ-Ⅳ respiratory distress syndrome or early-onset sepsis than the non-pulmonary hemorrhage group (P<0.05). The pulmonary hemorrhage group also had a higher proportion of VLBWIs with a capillary refilling time of >3 seconds within 1 hour after birth and with the maximum positive end-expiratory pressure (PEEP) of <5 cmH2O within 24 hours after birth (P<0.05). The multivariate regression analysis showed that maternal age of 30-<35 years (OR=0.115, P<0.05) was a protective factor against pulmonary hemorrhage, while a lower temperature (<34°C) within 1 hour after birth, the maximum PEEP of <5 cm H2O within 24 hours after birth, and early-onset sepsis were risk factors for pulmonary hemorrhage (OR=11.609, 11.118, and 20.661, respectively; P<0.05). For all VLBWIs, the pulmonary hemorrhage group had a longer duration of invasive ventilation and a higher mortality rate than the non-pulmonary hemorrhage group (P<0.05); for the survival VLBWIs, the pulmonary hemorrhage group had a higher incidence rate of bronchopulmonary dysplasia than the non-pulmonary hemorrhage group (P<0.05). CONCLUSIONS: Maintaining the stability of temperature, giving appropriate PEEP, and identifying sepsis as early as possible can reduce the incidence rate of pulmonary hemorrhage, thereby helping to reduce the incidence of bronchopulmonary dysplasia and mortality in VLBWIs.

Two-in-One Approach toward White-Light Emissions of Dimeric B/N Lewis Pairs by Tuning the Ortho-Substitution Effect.

A new family of dimeric B/N Lewis pairs with sterically tunable substitutions has been accomplished using the Two-in-One design strategy. Their structures are characteristic of doubly B/N-containing cores, and the electronic interactions between B and N centers can be modulated by the steric effects of ortho-substitutions from methyl groups. Interestingly, unique white-light emissions were achieved for 2M'2BNM and 1M2BNM, ascribed to the integration of two triarylborane species (Bsp2- and Bsp3-hybridization) into one single molecule.

Long non-coding RNA LINC01793 as a potential diagnostic biomarker of hepatitis B virus-related hepatocellular carcinoma.

BACKGROUND: There is growing evidence that long non-coding RNAs (lncRNAs) play important roles in the progression of hepatocellular carcinoma (HCC) and may serve as diagnostic markers. This study investigates the diagnostic efficiency of the long intergenic non-protein-coding RNA 1793 (LINC01793) in hepatitis B virus (HBV)-related HCC. METHODS: Bioinformatics methods were used to screen the aberrantly expressed lncRNAs in HCC tissues based on The Cancer Genome Atlas (TCGA). Quantitative reverse transcription polymerase chain reaction was performed to assess the expression of the candidate lncRNAs in tissues, cells and whole blood samples of patients with HBV-related HCC, liver cirrhosis (LC), chronic hepatitis (CHB), and healthy controls. Then, the correlations between LINC01793 and clinical characteristics were analyzed. Finally, the diagnostic value of LINC01793 was explored based on the receiver operating characteristic curve. RESULTS: LINC01793 was remarkably upregulated in the HCC tissues and cells. It was highly expressed in the whole blood of the HBV-related HCC patients, unlike in that of the healthy controls and of the CHB and LC patients. Subsequent analysis revealed that high LINC01793 was related to the Barcelona Clinic Liver Cancer (P = 0.007), tumor invasion (P = 0.042), the number of tumors (P = 0.031) and serum level of alanine aminotransferase(p = 0.022). The areas under the curve of LINC01793, for distinguishing HCC from healthy controls, CHB and LC patients, were 0.824, 0.767 and 0.756, respectively. In addition, the combination of LINC01793 with alpha fetoprotein (AFP) had a stronger diagnostic value than LINC01793 or AFP alone in AFP-negative HCC patients. CONCLUSION: High expression of LINC01793 is correlated with adverse clinical characteristics and can serve as a non-invasive biomarker of HCC.

[Identification of Q-markers for Cistanches Herba based on HPLC-Q-TOF-MS/MS and network pharmacology].

This study aims to establish a method for analyzing the chemical constituents in Cistanches Herba by high performance liquid chromatography(HPLC) and quadrupole-time-of-flight tandem mass spectrometry(HPLC-Q-TOF-MS/MS), and to reveal the pharmacological mechanism based on network pharmacology for mining the quality markers(Q-markers) of Cistanches Herba. The chemical constituents of Cistanche deserticola and C. tubulosa were analyzed via HPLC-Q-TOF-MS/MS. The potential targets and pathways of Cistanches Herba were predicted via SwissTargetPrediction and DAVID. The compound-target-pathway-pharmacological action-efficacy network was constructed via Cytoscape. A total of 47 chemical constituents were identified, involving 95 targets and 56 signaling pathways. We preliminarily elucidated the pharmacological mechanisms of echinacoside, acteoside, isoacteoside, cistanoside F, 2'-acetylacteoside, cistanoside A, campneoside Ⅱ, salidroside, tubuloside B, 6-deoxycatalpol, 8-epi-loganic acid, ajugol, bartsioside, geniposidic acid, and pinoresinol 4-O-ß-D-glucopyranoside, and predicted them to be the Q-markers of Cistanches Herba. This study identified the chemical constituents of Cistanches Herba, explained the pharmacological mechanism of the traditional efficacy of Cistanches Herba based on network pharmacology, and introduced the core concept of Q-markers to improve the quality evaluation of Cistanches Herba.

A novel particulate matter sampling and cell exposure strategy based on agar membrane for cytotoxicity study.

Laboratories use different strategies to sample and extract atmospheric particulate matter (PM), some of which can be very complicated. Due to the absence of a standard protocol, it is difficult to compare the results of PM toxicity assessment across different laboratories. Here, we proposed a novel PM sampling and cell exposure strategy based on agar membrane. The agar membrane, prepared by a simple freeze-drying method, has a relatively flat surface and porous interior. We demonstrated that the agar membrane was a reliable substitute material for PM sampling. Then the PM on the agar membranes was directly extracted with the culture medium by vortex method, and the PM on the polytetrafluoroethylene (PTFE) filters was extracted with water by the traditional ultrasonic method for comparison. The extraction efficiency was evaluated and in vitro cytotoxicity assays were carried out to investigate the toxic effects of PM extracted with two strategies on macrophage cells. The results showed that the PM extracted from agar membranes induced higher cytotoxicity and more differentially expressed proteins. Overall, the novel PM sampling-cell exposure strategy based on the agar membrane is easy to operate, biocompatible and comparable, and has low disturbance, could be an alternative sampling and extraction method for PM toxicity assessment.

Associations Between High-Sensitivity C-Reactive Protein and All-Cause Mortality Among Oldest-Old in Chinese Longevity Areas: A Community-Based Cohort Study.

BACKGROUND: The association between high-sensitivity C-reactive protein (hsCRP) levels and all-cause mortality for the oldest-old (aged 80 years or older) remains unclear. We aimed to investigate the associations between hsCRP concentrations and the risks of all-cause mortality, and further identify the potential modifying factors affecting these associations among the oldest-old. METHODS: This prospective, community-based cohort study included 2,206 participants aged 80 years or older (median age 93.0 years) from the Healthy Aging and Biomarkers Cohort Study. Cox proportional hazards regression models were used to estimate hazard ratios (HRs) with 95% confidential intervals (95% CIs) for all-cause mortality according to hsCRP quartiles and recommendation for relative risk categories of hsCRP levels (< 1.0, 1.0-3.0, and > 3.0 mg/L), with adjustment for sociodemographic information, lifestyle, physical examination, medical history, and other potential confounders. RESULTS: During a median follow-up period of 3.1 years (IQR: 1.6-3.9 years), 1,106 deaths were verified. After full adjustment for potential confounders, a higher hsCRP concentration was positively associated with an increased risk of all-cause mortality (P for trend < 0.001). Compared with the lowest quartile, the fully adjusted HRs of the second, third, and fourth quartiles were 1.17 (95% CI: 0.94, 1.46), 1.28 (95% CI: 1.01, 1.61), and 1.49 (95% CI: 1.20, 1.87), respectively. The association of hsCRP with all-cause mortality was modified by smoking status (P for interaction = 0.011), an increased risk of hsCRP with all-cause mortality showed among non-current smokers (HR: 1.17; 95% CI: 1.07, 1.28), but no significance was observed in current smokers (HR: 0.83; 95% CI: 0.66, 1.18). CONCLUSIONS: Our study indicated that elevated hsCRP concentrations were associated with a higher risk of all-cause mortality among Chinese oldest-old. Future studies investigating additional factors of disease and aging processes are needed to obtain a better understanding of the mechanisms.

[Comparison of therapeutic efficacy of Wuling Capsules prepared with different methods for rats with syndrome of liver Qi stagnation, spleen deficiency, and blood stasis].

Wuling Capsules is one of the commonly used drugs for the clinical treatment of chronic hepatitis B with the syndrome of liver Qi stagnation, spleen deficiency, and blood stasis. However, the present preparation method of Wuling Capsules ignores some macromolecules like polysaccharides. In this study, the influences of different ethanol concentrations in the preparation process on the extraction rates of macro-and micro-molecules were investigated. Further, the therapeutic efficacy of Wuling Capsules was evaluated with the reserpine-induced rat model of liver Qi stagnation, spleen deficiency, and blood stasis. When 50% ethanol was used for the last time of extraction, the concentrations of polysaccharides, salvianolic acid B, and schisandrin in the extract, as well as the dry extract yield, increased significantly compared with those of the original preparation method. However, the fingerprints of micro-molecules showed little difference between the two methods, with a similarity of 0.862. The study then set the 50% ethanol extraction as the new preparation method. The pharmacodynamics evaluation showed that the Wuling Capsules prepared with the original and new methods both significantly alleviated the emotional depression and metabolic disturbance in model rats, demonstrating good performance in protecting the rats against gastric mucosal injuries, modulating intestinal function, and activating blood circulation. The mechanism of action may be related to the regulation of gastrointestinal hormone secretion, reduction of inflammation, and promotion of dopamine synthesis in cortex and hippocampus. At the same dose, the Wuling Capsules prepared with the original and new methods showed roughly the same overall therapeutic efficacy. However, the Wuling Capsules prepared with the new method had stronger effect in activating blood circulation and modulating inflammation, but weaker effects in regulating gastrin and dopamine. The present study provides basis data for optimizing the preparation process of Wuling Capsules and deciphering the mechanism of its therapeutic effect on liver Qi stagnation, spleen deficiency, and blood stasis.

Nascent Proteome and Glycoproteome Reveal the Inhibition Role of ALG1 in Hepatocellular Carcinoma Cell Migration.

Asparagine-linked glycosylation protein 1 homolog (ALG1) participates in the initial stage of protein N-glycosylation and N-glycosylation has been implicated in the process of hepatocellular carcinoma (HCC) progression. However, whether ALG1 plays a role in human HCC remains unknown. In this study, the expression profile of ALG1 in tumorous and corresponding adjacent non-tumor tissues was analyzed. The relationship of ALG1 expression with clinical features and prognosis of HCC patients was also evaluated using immuno-histochemical method. Here we found ALG1 decreased in HCC tissues compared with adjacent normal liver tissues, which predicted an unfavorable prognosis. Combined with RNA interference, nascent proteome and glycoproteome were determined systematically in Huh7 cell line. Bioinformatics analysis indicated that the differentially expressed proteins participating in the response of ALG1 knockdown were most significantly associated with cell-cell adhesion. Functional studies confirmed that knockdown of ALG1 reduced cell adhesion capacity, and promoted cell migration. Furthermore, down-regulation of H8N2 (on N-glycosite N651) and H5N4S2F1 (on N-glycosite N692) from N-cadherin was identified as a feature of ALG1 knockdown. Our findings revealed that ALG1 controlled the expression of glycosylated N-cadherin and played a role in HCC migration, with implications for prognosis. Supplementary Information: The online version contains supplementary material available at 10.1007/s43657-022-00050-5.

Thermally Hypsochromic or Bathochromic Emissions? The Silver Nuclei Does Matter.

Structural modulation of core-shell silver nanoclusters from the inside is a huge challenge but of great importance in their syntheses. Herein, two silver nanoclusters [Ag3 S9 @Ag42 ] (SD/Ag45b) and [Ag9 S9 @Ag42 ] (SD/Ag51a) are isolated in the presence of different kinds of sulfonic acids. Uniquely, SD/Ag45b and SD/Ag51a show typical core-shell structures with the similar Ag42 shell but different cores. The outer shell of 42 silver atoms comprises two Ag3 trigons at two poles encircled by three equatorial distorted square cupolas (J4 , Ag12 ). The core in SD/Ag45b is a silver trigon ligated by nine S2- ions (Ag3 S9 ), while a tricapped triangular prismatic Ag9 also ligated by the same amount of S2- ions (Ag9 S9 ) is observed in the inner core of SD/Ag51a. The electrospray ionization mass spectrometry (ESI-MS) indicates that the introduction of p-toluenesulfonic acid can realize the transformation from SD/Ag45b to Ag51 . SD/Ag45b and SD/Ag51a show inverse luminescence thermochromic behaviors in the near-infrared (NIR) region, mainly dictated by the inner silver cores. This work not only realizes the synthesis of new silver nanoclusters by core modulation but also provides a prototype to get molecular-level insight into the correlation between structure and luminescence thermochromism.

Associations of Sarcopenia, Handgrip Strength and Calf Circumference with Cognitive Impairment among Chinese Older Adults.

OBJECTIVE: To evaluate the associations of sarcopenia, handgrip strength and calf circumference with cognitive impairment among Chinese older adults. METHODS: Totally 2,525 older adults were recruited from the Healthy Aging and Biomarkers Cohort Study. Cognitive impairment was assessed by the Chinese Mini-Mental State Examination. Handgrip strength was calculated from the means of the right and left hand values. Calf circumference was measured at the site of maximum circumference of the non-dominant leg. The formula developed by Ishii was used to define sarcopenia. Multiple logistic regression was performed to evaluate the associations of sarcopenia, handgrip strength, and calf circumference with cognitive impairment. RESULTS: The prevalence of cognitive impairment was 34.36%. The adjusted odds ratio ( OR) for cognitive impairment in individuals with sarcopenia was 2.55 [95% confidence interval (95% CI): 1.86-3.50]. Compared with individuals in the first quartile (Q 1) of calf circumference, the adjusted ORs in the second, third, and fourth quartiles (Q 2, Q 3, and Q 4) were 0.75 (95% CI: 0.58-0.96), 0.59 (95% CI: 0.44-0.79), and 0.62 (95% CI: 0.45-0.8), respectively. Compared with individuals in Q 1 of handgrip strength, the adjusted ORs for Q 2, Q 3, and Q 4 were 0.49 (95% CI: 0.38-0.62), 0.31 (95% CI: 0.23-0.41), and 0.30 (95% CI: 0.21-0.44), respectively. CONCLUSION: Sarcopenia, identified by low handgrip strength and low calf circumference, was positively associated with cognitive impairment.

Chemistry-specific responses due to rice-microbe interactions in the rhizosphere to counteract mefenacet stress.

The widespread use of herbicides has raised considerable concern with regard to their harmful consequences on plant growth, crop yield and the soil ecological environment. It has been well documented that colonization of rhizobacteria in the plant root system has a positive effect on activation of plant defenses to protect the plant from damage. Using the platform of high-throughput analysis with tandem mass spectrometry and Illumina sequencing, we identified the specific activated rhizobacteria, the key growth stimulating substances and the metabolic pathways involved in seedling stage tolerance to mefenacet stress in rice. The relative abundance of beneficial rhizospheremicrobes such as Acidobacteria and Firmicutes increased with mefenacet treatment, indicating that the rhizosphere recruited some beneficial microbes to resist mefenacet stress. Mefenacet treatment induced alterations in several interlinked metabolic pathways, many of which were related to activation of defense response signaling, especially the indole-3-pyruvate pathway. Indole-3-acetaldehyde and indole-3-ethanol from this pathway may act as flexible storage pools for indole-3-acetic acid (IAA). Our findings also suggest that a significant increase of IAA produced by the enrichment of beneficial rhizospheremicrobes, for example genus Bacillus, alleviated the dwarfing phenomenon observed in hydroponic medium following mefenacet exposure, which may be a key signaling molecule primarily for phytostimulation and phytotolerance in microbe-plant interactions.

Quantification of Intact O-Glycopeptides on Haptoglobin in Sera of Patients With Hepatocellular Carcinoma and Liver Cirrhosis.

Haptoglobin (Hp) is one of the acute-phase response proteins secreted by the liver, and its aberrant N-glycosylation was previously reported in hepatocellular carcinoma (HCC). Limited studies on Hp O-glycosylation have been previously reported. In this study, we aimed to discover and confirm its O-glycosylation in HCC based on lectin binding and mass spectrometry (MS) detection. First, serum Hp was purified from patients with liver cirrhosis (LC) and HCC, respectively. Then, five lectins with Gal or GalNAc monosaccharide specificity were chosen to perform lectin blot, and the results showed that Hp in HCC bound to these lectins in a much stronger manner than that in LC. Furthermore, label-free quantification based on MS was performed. A total of 26 intact O-glycopeptides were identified on Hp, and most of them were elevated in HCC as compared to LC. Among them, the intensity of HYEGS 316TVPEK (H1N1S1) on Hp was the highest in HCC patients. Increased HYEGS 316TVPEK (H1N1S1) in HCC was quantified and confirmed using the MS method based on 18O/16O C-terminal labeling and multiple reaction monitoring. This study provided a comprehensive understanding of the glycosylation of Hp in liver diseases.

Revealing the chirality origin and homochirality crystallization of Ag14 nanocluster at the molecular level.

Although chirality is an ever-present characteristic in biology and some artificial molecules, controlling the chirality and demystifying the chirality origin of complex assemblies remain challenging. Herein, we report two homochiral Ag14 nanoclusters with inherent chirality originated from identical rotation of six square faces on a Ag8 cube driven by intra-cluster π···π stacking interaction between pntp- (Hpntp = p-nitrothiophenol) ligands. The spontaneous resolution of the racemic (SD/rac-Ag14a) to homochiral nanoclusters (SD/L-Ag14 and SD/R-Ag14) can be realized by re-crystallizing SD/rac-Ag14a in acetonitrile, which promotes the homochiral crystallization in solid state by forming C-H···O/N hydrogen bonds with nitro oxygen atoms in pntp- or aromatic hydrogen atoms in dpph (dpph = 1,6-bis(diphenylphosphino)hexane) on Ag14 nanocluster. This work not only provides strategic guidance for the syntheses of chiral silver nanoclusters in an all-achiral environment, but also deciphers the origin of chirality at molecular level by identifying the special effects of intra- and inter-cluster supramolecular interactions.

Analysis of Serum Paraoxonase 1 Using Mass Spectrometry and Lectin Immunoassay in Patients With Alpha-Fetoprotein Negative Hepatocellular Carcinoma.

The diagnosis of AFP (alpha-fetoprotein)-negative HCC (hepatocellular carcinoma) mostly relies on imaging and pathological examinations, and it lacks valuable and practical markers. Protein N-glycosylation is a crucial post-translation modifying process related to many biological functions in an organism. Alteration of N-glycosylation correlates with inflammatory diseases and infectious diseases including hepatocellular carcinoma. Here, serum N-linked intact glycopeptides with molecular weight (MW) of 40-55 kDa were analyzed in a discovery set (n = 40) including AFP-negative HCC and liver cirrhosis (LC) patients using label-free quantification methodology. Quantitative lens culinaris agglutin (LCA) ELISA was further used to confirm the difference of glycosylation on serum PON1 in liver diseases (n = 56). Then, the alteration of site-specific intact N-glycopeptides of PON1 was comprehensively assessed by using Immunoprecipitation (IP) and mass spectrometry based 16O/18O C-terminal labeling quantification method to distinguish AFP-negative HCC from LC patients in a validation set (n = 64). Totally 195 glycopeptides were identified using a dedicated search engine pGlyco. Among them, glycopeptides from APOH, HPT/HPTR, and PON1 were significantly changed in AFP-negative HCC as compared to LC. In addition, the reactivity of PON1 with LCA in HCC patients with negative AFP was significantly elevated than that in cirrhosis patients. The two glycopeptides HAN253WTLTPLK (H5N4S2) and (H5N4S1) corresponding to PON1 were significantly increased in AFP-negative HCC patients, as compared with LC patients. Variations in PON1 glycosylation may be associated with AFP-negative HCC and might be helpful to serve as potential glycomic-based biomarkers to distinguish AFP-negative HCC from cirrhosis.