Screening the Protective Agents Able to Improve the Survival of Lactic Acid Bacteria Strains Subjected to Spray Drying Using Several Key Enzymes Responsible for Carbohydrate Utilization.

The aim of this study was to identify the most effective protectants for enhancing the viability of specific lactic acid bacteria (LAB) strains (Lactobacillus delbrueckii subsp. bulgaricus CICC 6097, Lactiplantibacillus plantarum CICC 21839, Lactobacillus acidophilus NCFM) by assessing their enzymatic activity when exposed to spray drying (inlet/outlet temperature: 135 °C/90 °C). Firstly, it was found that the live cell counts of the selected LAB cells from the 10% (w/v) recovered skim milk (RSM) group remained above 107 CFU/g after spray drying. Among all the three groups (1% w/v RSM group, 10% w/v RSM group, and control group), the two enzymes pyruvate kinase (PK) and lactate dehydrogenase (LDH) were more sensitive to spray drying than hexokinase (HK) and ß-galactosidase (ß-GAL). Next, transcriptome data of Lb. acidophilus NCFM showed that 10% (w/v) RSM improved the down-regulated expressions of genes encoding PK (pyk) and LDH (ldh) after spray drying compared to 1% (w/v) RSM. Finally, four composite protectants were created, each consisting of 10% (w/v) RSM plus a different additive-sodium glutamate (CP-A group), sucrose (CP-B group), trehalose (CP-C group), or a combination of sodium glutamate, sucrose, and trehalose (CP-D group)-to encapsulate Lb. acidophilus NCFM. It was observed that the viable counts of strain NCFM (8.56 log CFU/g) and enzymatic activity of PK and LDH in the CP-D group were best preserved compared to the other three groups. Therefore, our study suggested that measuring the LDH and PK activity could be used as a promising tool to screen the effective spray-dried protective agent for LAB cells.

Danshensu reduces neuronal excitability by enhancing potassium currents in bushy cells in the mouse cochlear nucleus.

Danshensu, also known as salvianic acid A, is a primary active compound extracted from a traditional Chinese herb Danshen (Salvia miltiorrhiza). While its antioxidative and neuroprotective effects are well-documented, the underlying mechanisms are poorly understood. In this study, we sought out to investigate if and how Danshensu modulates neuronal excitability and voltage-gated ionic currents in the central nervous system. We prepared brain slices of the mouse brainstem and performed patch-clamp recording in bushy cells in the anteroventral cochlear nucleus, with or without Danshensu incubation for 1 h. QX-314 was used internally to block Na+ current, while tetraethylammonium and 4-aminopyridine were used to isolate different subtypes of K+ current. We found that Danshensu of 100 µm decreased the input resistance of bushy cells by approximately 60% and shifted the voltage threshold of spiking positively by approximately 7 mV, resulting in significantly reduced excitability. Furthermore, we found this reduced excitability by Danshensu was caused by enhanced voltage-gated K+ currents in these neurons, including both low voltage-activated IK,A, by approximately 100%, and high voltage-activated IK,dr, by approximately 30%. Lastly, we found that the effect of Danshensu on K+ currents was dose-dependent in that no enhancement was found for Danshensu of 50 µm and Danshensu of 200 µm failed to cause significantly more enhancement on K+ currents when compared to that of 100 µm. We found that Danshensu reduced neuronal excitability in the central nervous system by enhancing voltage-gated K+ currents, providing mechanistic support for its neuroprotective effect widely seen in vivo.

Baicalin suppresses macrophage JNK-mediated adipose tissue inflammation to mitigate insulin resistance in obesity.

ETHNOPHARMACOLOGICAL RELEVANCE: Radix scutellariae (the root of Scutellaria baicalensis Georgi) is a traditional Chinese medicine (TCM) used to treat a wide range of inflammation-related diseases, such as obesity, diabetes, diabetic kidney disease, and COVID-19-associated inflammatory states in the lung and kidney. Baicalin is the major anti-inflammatory component of Radix scutellariae and has shown the potential to inhibit inflammation in metabolic disorders. In this study, we explored the ability and underlying mechanisms of baicalin to modulate the macrophage to mitigate insulin resistance in obesity. MATERIALS AND METHODS: Obese mice were administered baicalin (50 mg/kg/day) intraperitoneally for 3 weeks. RAW264.7 and BMDM cells were stimulated with LPS and treated with baicalin for 24 h, while 3T3-L1 and primary white adipocytes were treated with the supernatants from baicalin-treated RAW264.7 cells for 24 h. RESULTS: The results showed that baicalin significantly improved glucose and insulin tolerance as well as decreased fat and adipose tissue macrophage levels in obese mice. Besides, baicalin significantly reduced serum and adipose tissue IL-1ß, TNF-α and IL-6 levels in obese mice, as well as suppressed LPS-induced IL-1ß, TNF-α and IL-6 expression and release in macrophages. Furthermore, treatment with the supernatant from baicalin-treated RAW264.7 cells increased the levels of PGC-1α, SIRT1, p-IRS-1 and p-AKT in adipocytes. Moreover, baicalin treatment dramatically downregulated macrophage p-p38, p-JNK, and Ac-p65Lys310 levels while increasing SIRT1 both in vivo and in vitro. Importantly, JNK inhibitor SP600125 blocked most of the effects of baicalin on SIRT1, Ac-p65Lys310 and pro-inflammatory factors in macrophages. CONCLUSION: Therefore, these results demonstrated for the first time that baicalin exerts its anti-inflammatory effects in obese adipose tissue macrophages mainly through suppressing JNK/SIRT1/p65 signaling. These findings amplified the mechanisms of baicalin and its potential to attenuate insulin resistance.

Suicide among lymphoma patients.

BACKGROUND: Higher suicide rates were observed in patients diagnosed with lymphoma. In this study, we accurately identified patients with high-risk lymphoma for suicide by constructing a nomogram with a view to effective interventions and reducing the risk of suicide. METHODS: 235,806 patients diagnosed with lymphoma between 2000 and 2020 were picked from the Surveillance, Epidemiology, and End Results (SEER) database and randomly divided into training (N = 165,064) and validation set (N = 70,742). A combination of the Least absolute shrinkage and selection operator (LASSO) and Cox proportional hazards regression identified the predictors that constructed the nomogram. To assess the discrimination, calibration, clinical applicability, and generalization of this nomogram, we implemented receiver operating characteristic curves (ROC), calibration curves, decision curve analysis (DCA), and internal validation. The robustness of the results was assessed by the competing risks regression model. RESULTS: Age at diagnosis, gender, ethnicity, marital status, stage, surgery, radiotherapy, and annual household income were key predictors of suicide in lymphoma patients. A nomogram was created to visualize the risk of suicide after a lymphoma diagnosis. The c-index for the training set was 0.773, and the validation set was 0.777. The calibration curve for the nomogram fitted well with the diagonal and the clinical decision curve indicated its clinical benefit. LIMITATION: The effects of unmeasured and unnoticed biases and confounders were difficult to eliminate due to retrospective studies. CONCLUSION: A convenient and reliable model has been constructed that will help to individualize and accurately quantify the risk of suicide in patients diagnosed with lymphoma.

Depression Mediates the Association Between Burden and Quality of Life in Informal Caregivers of Stroke Survivors: Meta-analytic Structural Equation Modeling.

OBJECTIVE: This study aims to use Meta-analytical structural equation modeling (MASEM) to clarify the relationship between burden, depression, and quality of life in informal caregivers of stroke survivors. DATA SOURCES: The databases of PubMed, Cochrane Library, Embase, China Knowledge Resource Integrated Database, Wan Fang Database, and Chinese Biomedical Database were comprehensively searched before January 16, 2023. STUDY SELECTION: Two researchers performed an independent initial search by using a unified search strategy. Observational studies investigating the relation between burden, depression, and quality of life in informal caregivers of stroke survivors were included. The studies that met the inclusion criteria were appraised by "Quality Assessment and Validity Tool for Correlational Studies". DATA EXTRACTION: PRISMA guidelines were used for this study. Data extraction was performed independently by 2 researchers. The following data were extracted: study author, year of publication, country, language, sample size, age, sex (%women), the caregivers' relation with stroke survivor, measures, type of outcome reported in the study, study design, and main conclusion. DATA SYNTHESIS: The analysis included 18 articles that reported 23 effect sizes (N=3284). The MASEM findings showed that caregiver burden was positively associated with caregiver depression (ß=0.474, 95% CI [0.398, 0.550]), caregiver depression was negatively associated with caregiver quality of life (ß=-0.316, 95% CI [-0.545, -0.087]). Furthermore, the association between caregiver burden and quality of life was completely mediated by caregiver depression (ß=-0.150, 95% CI [-0.271, -0.041]). CONCLUSIONS: Using the MASEM approach, we observed that caregiver depression completely mediated the relation between burden and quality of life in informal caregivers of stroke survivors. Although the results did not allow for causal inference, this result suggested that for burdened stroke survivors' informal caregivers efforts should be made to their mental health to eliminate the internal barriers, then eventually improve their quality of life.

Latent class analysis of symptoms of depression and anxiety among older women.

OBJECTIVES: This cross-sectional study aims to consider the potential classification of depression and anxiety symptoms among older women, and identify the influencing factors of this classification. METHODS: This study examines Chinese women aged 65 years and older. Latent class analysis was used to explore the mental health subgroups of older women, and multivariate logistic regression was employed to examine the influencing factors based on the health ecological model among these subgroups. RESULTS: The results helped classify this population under three subgroups: the coexistence of depression and anxiety group, dominated depression group, and the low symptoms group. Moreover, class differences in terms of age, residence, education, income, assessment of current life and health status, sleep duration, and health behaviors, such as alcohol use and exercise were noted. CONCLUSIONS: These findings explain the heterogeneity among older women, and help illuminate their unique aspects of mental health. Accordingly, they are significant for scholars and policymakers to understand depression and anxiety among older women.

Phytosterol and phytostanol-mediated epigenetic changes in cancer and other non-communicable diseases: a systematic review.

Phytosterols/phytostanols are bioactive compounds found in vegetable oils, nuts and seeds and added to a range of commercial food products. Consumption of phytosterols/phytostanols reduces levels of circulating LDL-cholesterol, a causative biomarker of CVD, and is linked to a reduced risk of some cancers. Individuals who consume phytosterols/phytostanols in their diet may do so for many years as part of a non-pharmacological route to lower cholesterol or as part of a healthy diet. However, the impact of long term or high intakes of dietary phytosterols/phytostanols has not been on whole-body epigenetic changes before. The aim of this systematic review was to identify all publications that have evaluated changes to epigenetic mechanisms (post-translation modification of histones, DNA methylation and miRNA expression) in response to phytosterols/phytostanols. A systematic search was performed that returned 226 records, of which eleven were eligible for full-text analysis. Multiple phytosterols were found to inhibit expression of histone deacetylase (HDAC) enzymes and were also predicted to directly bind and impair HDAC activity. Phytosterols were found to inhibit the expression and activity of DNA methyl transferase enzyme 1 and reverse cancer-associated gene silencing. Finally, phytosterols have been shown to regulate over 200 miRNA, although only five of these were reported in multiple publications. Five tissue types (breast, prostate, macrophage, aortic epithelia and lung) were represented across the studies, and although phytosterols/phytostanols alter the molecular mechanisms of epigenetic inheritance in these mammalian cells, studies exploring meiotic or transgenerational inheritance were not found.

Latent profile analysis of the symptoms of depression and activities of daily living impairment among older adults.

BACKGROUND: With the aging population, depressive symptoms and impaired Activities of Daily Living have increased medical costs and mortality, generating severe public health issues. This study reconsiders the potential classification of depressive symptoms and ADL impairment in older adults and identifies various factors that may affect classifications. METHODS: This study focused on 6270 Chinese adults aged 65 years or older. We used latent profile analysis to explore depressive symptoms and ADL impairment (basic ADLs and instrumental ADLs) in various subgroups of older adults. We used Chi-square analysis and multivariate logistic regression to examine the determinants of depressive symptoms and ADL impairment among subgroups. RESULTS: The study's results classified older adults into three subgroups: those with high level depressive symptoms and BADLs and IADLs impairment, those with moderate level depressive symptoms and IADLs impairment, and those with no to low level depressive symptoms and without BADLs and IADLs impairment. Illiterate, having fallen in the past year, as well as having hearing difficulties all predicted high level depressive symptoms and severe BADLs and IADLs impairment. In contrast, regular exercise, contact with friends, playing cards/mahjong, participating in organized social activities, and visiting siblings predicted moderate level depressive symptoms and IADLs impairment. CONCLUSION: This paper discusses what is known about the various subgroups as well as the treatment of depressive symptoms and ADL impairment in older populations. It also gives policy and practice recommendations for the future that may help rehabilitate and maintain the mental health and ADLs independence of older adults. (PsycInfo Database Record (c) 2024 APA, all rights reserved).

Novel isobavachalcone derivatives induce apoptosis and necroptosis in human non-small cell lung cancer H1975 cells.

In this study, seventeen isobavachalcone (IBC) derivatives (1-17) were synthesised, and evaluated for their cytotoxic activity against three human lung cancer cell lines. Among these derivatives, compound 16 displayed the most potent cytotoxic activity against H1975 and A549 cells, with IC50 values of 4.35 and 14.21 µM, respectively. Compared with IBC, compound 16 exhibited up to 4.11-fold enhancement of cytotoxic activity on human non-small cell lung cancer H1975 cells. In addition, we found that compound 16 suppressed H1975 cells via inducing apoptosis and necroptosis. The initial mechanism of compound 16 induced cell death in H1975 cells involves the increasing of Bax/Bcl-2 ratio and Cyt C protein level, down-regulating of Akt protein level, and cleaving caspase-9 and -3 induced apoptosis; the up-regulation of RIP3, p-RIP3, MLKL, and p-MLKL levels induced necroptosis. Moreover, compound 16 also caused mitochondrial dysfunction, thereby decreasing cellular ATP levels, and resulting in excessive reactive oxygen species (ROS) accumulation.

Effect of stressors on family adaptation in stroke patients: A parallel multivariable mediation model.

AIMS: The mechanisms underlying how stressors affect family adaptation are unclear. This study determined the relationship between stressors and family adaptation among stroke patients, particularly the parallel mediating role of family function and family resilience. METHODS AND RESULTS: The study was conducted in the neurology ward of a tertiary hospital in China. A total of 335 stroke inpatients were interviewed face-to-face from August 2020 to March 2021. A questionnaire was administered that included demographic characteristics, the Family Inventory of Life Events and Changes, Family Apgar Index Scale, Family Hardiness Index Scale, and Family Adaptation Scale. The demographic data and correlations among the research variables were analyzed. A bootstrap method using the SPSS PROCESS macro was employed to test a mediation model. Family adaptation was negatively related to stressors (r = -0.291, p < 0.01) and positively related to family function (r = 0.531, p < 0.01) and family resilience (r = 0.393, p < 0.01). Furthermore, family function and family resilience played parallel mediating roles between stressors and family adaptation. CONCLUSIONS: This study elaborated how stressors interacted with family adaptation through the mediation of family function and family resilience. The findings suggest that enhancement of family function and family resilience may help to improve family adaptation among stroke patients.

Determinants Influencing Health-Promoting Behaviors in Individuals at High Risk of Stroke: A Cross-Sectional Study.

BACKGROUND: Health-promoting behaviors and positive lifestyle changes are crucial for effective stroke prevention. However, individuals at high risk of stroke exhibit poor health behavior due to a deficiency of individual motivation. Moreover, there are only a few studies on health-promoting behaviors that have applied behavior change theories in individuals at high risk of stroke. OBJECTIVE: This study aimed to use the theory of the planned behavior (TPB) model to investigate determinants of health-promoting behaviors for stroke prevention and control. METHOD: In this cross-sectional study, 263 participants were recruited from five community health centers in Qingdao. Confirmatory factor analysis was performed to assess the reliability and validity of the constructs, and structural equation modeling was used to analyze the proposed relationships between the TPB-related variables. RESULTS: The attitudes, subjective norms, and perceptions of behavioral control positively influenced behavioral intention. The behavioral intention had a positive effect on health-promoting behaviors. Attitudes, subjective norms, and perceived behavioral control were influenced primarily by the mediating variable behavioral intention to affect health-promoting behaviors. Stroke knowledge was an influential facilitator of behavioral attitudes, subjective norms, and perceived behavior control. CONCLUSION: The TPB-based model is suitable for explaining health-promoting behaviors in individuals at risk of stroke and for guiding the development of effective health management programs. A comprehensive person-centered motivation behavior strategy that is based on health education and complemented by social support and health resource optimization is critical in promoting health behavior motivation and health promotion behaviors in stroke high-risk groups.

Mediating effect of post-stroke depression between activities of daily living and health-related quality of life: meta-analytic structural equation modeling.

BACKGROUND: Stroke survivors face various problems that affect their health-related quality of life (HRQoL). Reduced activities of daily living (ADL) may contribute to post-stroke depression (PSD) and low HRQoL, and depression might be associated with low HRQoL. However, these relationships are not well known. This study aimed to analyze correlations among ADL, PSD, and HRQoL in stroke survivors and further explore the mediating role of PSD between ADL and HRQoL. METHODS: This study utilized meta-analytic structural equation modeling (MASEM) on systematically searched articles from six electronic databases, namely PubMed, Embase, the Cochrane Library, China National Knowledge Infrastructure (China), Wanfang database (China), and SinoMed (China), from inception up to July 31, 2021. Two researchers independently assessed study eligibility, and data from the eligible studies were encoded and assessed for quality. MASEM was utilized to examine correlations among ADL, PSD, and HRQoL, with an estimation of a pooled correlation matrix under a random-effects model. The matrix was directly fitted to a structural equation model using webMASEM. RESULTS: In total, 8580 articles were screened, and data from 27 studies involving 33 effect sizes were used in the MASEM analysis. Correlations among the three variables were significant (both P < 0.01). Furthermore, PSD partially mediated the correlation between ADL and HRQoL (ß = 0.24, 95% confidence interval 0.15-0.30). CONCLUSIONS: The findings suggest that both decreased ADL and PSD may reduce HRQoL, while a decrease in ADL tends to cause depression after stroke. Therefore, ADL and PSD reductions should be improved to achieve better HRQoL of stroke survivors. Future studies should continue to discuss other factors affecting HRQoL to achieve optimal recovery in stroke survivors.

Corrigendum: Longitudinal Association Between Depressive Symptoms and Cognitive Function Among Older Adults: A Parallel Latent Growth Curve Modeling Approach.

[This corrects the article DOI: 10.3389/ijph.2022.1605124.].

Has the COVID-19 pandemic affected nursing students' career self-efficacy and professional calling? The mediating impact of professional identity.

BACKGROUND: Professional calling (PC) is crucial for ascertaining their professional goals and fulfilling career choices in nursing students. Thus, understanding its antecedents and helping schools improve PC among nursing students is critical. This study aims to explore whether professional identity (PI), as a crucial antecedent of PC, acts as an intermediary between career self-efficacy (CSE) and professional calling during the COVID-19 pandemic. METHODS: A sample of 565 nursing students were selected by a web-based survey through convenience sampling. The study was conducted from October to November 2020. Measures of CSE, PI, and PC were assessed during the COVID-19 pandemic. We analyzed demographic data and the correlation of the research variables. The significance of the mediation effect was assessed using a bootstrap method with SPSS. RESULTS: CSE during the COVID-19 pandemic outbreak (r = 0. 359, p < 0. 01) and PI (r = 0. 670, p < 0. 01) were both relevant to PC among nursing students. In addition, CSE had a positive indirect effect on PC through PI (ß = 0. 288, p < 0. 05). CONCLUSIONS: Higher scores in CSE and a better PI were associated with PC in nursing students. Furthermore, a better CSE had an indirect effect on the PC of students through PI. The favorable evidence in our study confirms that nursing educators can adopt PI interventions to improve the sense of PC among nursing students.

The mediating effect of post-stroke depression between social support and quality of life among stroke survivors: A meta-analytic structural equation modeling.

OBJECTIVES: The aim was to confirm the relationship between social support (SS), post-stroke depression (PSD), and quality of life (QOL) and determine the mediating effect of PSD in stroke survivors. Additionally, we tested the impact of economic development level (in developed or developing countries) on the relationship between SS, PSD, and QOL. METHODS: This study utilized meta-analytic structural equation modeling on systematically searched articles from PubMed, MEDLINE, Cochrane Library, Scopus, PsycINFO, Web of Science, China National Knowledge Infrastructure, and WanFang data published from inception to February 2022. Collect the sample size (n) of each study and the associations of observed variables, and conduct meta-analysis path analysis using AMOS 23.0 to assess the relationships. Concurrently, the effects of the national economic development level were extracted for moderator analysis. RESULTS: A total of 28 studies (N = 3967) were included for analysis. SS and PSD were significant predictors of QOL (both p < 0.01). PSD mediated the relationship between SS and QOL (ß = 0.31; 95% confidence interval 0.273-0.345; p < 0.01). Furthermore, in developed countries, SS was not statistically correlated with PSD (p = 0.811) compared to developing countries. CONCLUSIONS: Improving SS may help improve the QOL of stroke patients. PSD should be addressed using a comprehensive approach that includes interventions to enhance the QOL. Additionally, people have different psychological reactions to SS at different stages of economic development; thus, further research is needed to develop different measurement standards for patients according to the country's level of economic development.

Longitudinal Association Between Depressive Symptoms and Cognitive Function Among Older Adults: A Latent Growth Curve Modeling Approach.

Objectives: Although the evidence from numerous longitudinal studies has indicated a remarkable change in cognitive function (CF) and depressive symptoms (DS) over time, the parallel latent growth curve model (LGCM) has seldom been used to simultaneously investigate the relationship between their change trajectories. This study aimed to examine whether a change in DS was associated with CF over time using an LGCM. Methods: Data were collected from the Chinese Longitudinal Healthy Longevity Survey's 2011, 2014, and 2018 waves. A parallel LGCM examined the association between CF and DS. Results: The multivariate conditioned model's goodness of fit supported the validity of the longitudinal model (Tucker-Lewis index [TLI] = 0.90, comparative fit index [CFI] = 0.96, root mean square error of approximation [RMSEA] = 0.04). The results showed that the CF intercept was positively to the DS slope (ß = 0.42, p = 0.004). The CF and DS slopes were significantly linked (ß = -0.65, p = 0.002). Conclusion: The findings expand the knowledge about CF's effect on DS in older adults.

Joint developmental trajectories and temporal precedence of physical function decline and cognitive deterioration: A longitudinal population-based study.

Objectives: Previous studies primarily explored the unidirectional impact of cognition on physical function. However, the interplay between physical function and cognition and the temporal precedence in their predictive relationships have not been elucidated. We explored the bidirectional mechanism between physical function and cognition in a longitudinal dataset. Materials and methods: A total of 1,365 participants in the Chinese Longitudinal Healthy Longevity Survey assessed physical function and cognition in 2011 (T1), 2014 (T2), and 2018 (T3) by the Katz scale and the Chinese version of the Mini-Mental State Examination scale, respectively. Changes in the trajectories of physical function and cognition were examined using the latent growth model. The correlational and reciprocal relationships between physical function and cognition were examined using the parallel process latent growth model and autoregressive cross-lagged (ARCL) models. Results: Cognition and physical function decreased by an average of 0.096 and 0.017 points per year, respectively. Higher physical function was associated with better cognition at baseline (r = 0.237, p < 0.05), and longitudinal changes in physical function and cognition were positively correlated (r = 0.756, p < 0.05). ARCL analysis indicated that physical function at T1 positively predicted T2 cognitive function. However, this predictive relationship reversed between T2 and T3, whereby cognitive function at T2 predicted physical function at T3. Conclusion: Both physical function and cognition declined over time. Early identification and intervention in physical dysfunction among older adults could be critical to prevent further cognitive impairment and maintain functional independence. Hence, regular functional assessment and individualized care plans are required to achieve healthy aging.

The Enzyme Gene Expression of Protein Utilization and Metabolism by Lactobacillus helveticus CICC 22171.

The purpose of this study was to explore the hydrolytic ability of Lactobacillus helveticus CICC 22171 with regard to protein and the expression of enzyme genes during protein utilization. The results revealed that the strain hydrolyzed casein from the C-terminal, reached the maximum level in 6 h, and the number of amino acids in the hydrolyzed peptide was 7-33. The molecular weight was 652.4-3432.74 kDa. Hydrophobic peptides produced by hydrolysis were the source of ß-casein bitterness. Leucine and glutamine were the preferred cleavage points after 1 h; tyrosine and tryptophan subsequently increased. The first step of hydrolysis was controlled by PrtP and PrtM genes and coordinated with the action of PrtH1 and PrtH2. The transport system consisted of DtpT, OppB, OppD and OppF. The hydrolytic third step endopeptidase system consisted of the aminopeptidases (PepN, PepC, PepM and PepA), the endopeptidases (PepE, PepF and PepO); the dipeptidases (PepV and PepD), the tripeptidase PepT; the proline peptidases (PepX, PepP, PepQ, PepR and PepI). The expression of CEP genes was significantly different, and the expression level of genes related to the transport system significantly increased from 0 to 1 h. The specificity of the substrate and action site of endopeptidase was abundant.

Associations between liver X receptor polymorphisms and blood lipids: A systematic review and meta-analysis.

Genetic susceptibility to dyslipidaemia remains incompletely understood. The liver X receptors (LXRs), members of the nuclear receptor superfamily of ligand dependent transcription factors, are homeostatic regulators of lipid metabolism. Multiple single nucleotide polymorphisms (SNPs)have been identified previously in the coding and regulatory regions of the LXRs. The aim of this systematic review and meta-analysis was to summarise associations between SNPs of LXRs (α and ß isoforms) with blood lipid and lipoprotein traits. Five databases (PubMed, Ovid Embase, Scopus, Web of Science, and the Cochrane Library) were systematically searched for population-based studies that assessed associations between one or more blood lipid/lipoprotein traits and LXR SNPs. Of seventeen articles included in the qualitative synthesis, ten were eligible for meta-analysis. Nine LXRα SNPs and five LXRß SNPs were identified, and the three most studied LXRα SNPs were quantitatively summarised. Carriers of the minor allele A of LXRα rs12221497 (-115G>A) had higher triglyceride levels than GG homozygotes (0.13 mmol/L; 95%CI: [0.03, 0.23], P = 0.01). Heterozygote carriers of LXRα rs2279238 (297C/T) had higher total cholesterol levels (0.12 mmol/L; (95%CI: [0.01, 0.23], P = 0.04) than either CC or TT homozygotes. For LXRα rs11039155 (-6G>A), no significant differences in blood levels of either triglyceride (P = 0.39) or HDL-C (P = 0.98) were detected between genotypes in meta-analyses. In addition, there were no strong associations for other SNPs of LXRα and LXRß. This study provides the evidence of an association between LXRα, but not LXRß, SNPs and blood-lipid traits. Systematic review registration: PROSPERO No. CRD42021246158.