Actomonas aquatica gen. nov., sp. nov., a marine lineage in the phylum Verrucomicrobiota with genetic potential for carbon and nitrogen fixation.

A novel bacterial strain, designated WL0086T, was isolated from a marine sediment sample collected in Lianyungang city, Jiangsu province, PR China. This strain showed the highest 16S rRNA gene sequence similarity to Geminisphaera colitermitum TAV2T (92.7 %) of the family Opitutaceae, and all the unclassified cultured and uncultured isolates with similarities >95 % were from marine environments. Cells were Gram-stain-negative, aerobic, non-motile cocci with a size of 0.6-0.8 µm in diameter. Strain WL0086T was positive for both oxidase and catalase, and grew at 20-37 °C (optimum, 28 °C), with 1.5-11.0 % NaCl (w/v; optimum, 2.5-4.0 %) and at pH 5.0-9.0 (optimum, pH 7.0). The major polar lipid profile of strain WL0086T consisted of phosphatidylethanolamine, phosphatidylglycerol, diphosphatidylglycerol, and phosphatidylcholine. The major isoprenoid quinone was menaquinone-7 and the predominant fatty acids were iso-C14 : 0, anteiso-C15 : 0, C16 : 0 and C16 : 1 ω9c. The complete genome consisted of a chromosome with 6 109 182 bp. The G+C content of genomic DNA was 64.0%. Results of phylogenomic analysis based on the 16S rRNA gene sequence and the whole genome suggested that strain WL0086T formed a distinct clade closely neighbouring the members of the family Opitutaceae. On the basis of phylogenetic, phenotypic, and chemotaxonomic evidences, strain WL0086T should represent a novel genus of the family Opitutaceae, for which the name Actomonas aquatica gen. nov., sp. nov. is proposed. The type strain is WL0086T (=MCCC 1K05844T=JCM 34677T=GDMCC 1.2411T).

Ruegeria marisflavi sp. nov. and Ruegeria aquimaris sp. nov., isolated from seawater of the Yellow Sea.

Two novel Gram-stain-negative, aerobic, non-motile and rod-shaped bacteria, designated as WL0004T and XHP0148T, were isolated from seawater samples collected from the coastal areas of Nantong and Lianyungang, PR China, respectively. Both strains were found to grow at 10-42 °C (optimum, 37 °C) and with 2.0-5.0 % (w/v) NaCl (optimum, 3.0 %). Strain WL0004T grew at pH 6.0-9.0 (optimum, pH 7.0-8.0), while XHP0148T grew at pH 6.0-10.0 (optimum, pH 7.0-8.0). The major cellular fatty acids (>10 %) of both strains included summed feature 8 (C18 : 1 ω6c and/or C18 : 1 ω7c). In addition, strain WL0004T contained 11-methyl C18 : 1 ω7c and strain XHP0148T contained C12 : 0 3-OH. The respiratory quinone of both strains was ubiquinone-10. The G+C content of genomic DNA of strains WL0004T and XHP0148T were 62.5 and 63.0 mol%, respectively. Strains WL0004T and XHP0148T showed the highest 16S rRNA gene sequence similarity to Ruegeria pomeroyi DSS-3T (99.4 and 99.0 %, respectively), and the 16S rRNA gene-based phylogenetic analysis indicated that the two strains were closely related to members of the genus Ruegeria. The average nucleotide identity and digital DNA-DNA hybridization values among the two strains and type strains of the genus Ruegeria were all below 95 and 70 %, respectively, and the phylogenetic tree reconstructed from the bac120 gene set indicated that the two strains are distinct from each other and the members of the genus Ruegeria. Based on this phenotypic and genotypic characterization, strains WL0004T (=MCCC 1K07523T=JCM 35565T=GDMCC 1.3083T) and XHP0148T (=MCCC 1K07543T=JCM 35569T=GDMCC 1.3089T) should be recognized as representing two novel species of the genus Ruegeria and the names Ruegeria marisflavi sp. nov. and Ruegeria aquimaris sp. nov. are proposed, respectively.

Hohaiivirga grylli gen. nov., sp. nov., a New Member of the Family Methylobacteriaceae, Isolated from Cricket (Gryllus chinensis).

A Gram-staining negative, non-motile, rod-shaped, oxidase negative and catalase positive strain WL0021T was isolated from cricket (Gryllus chinensis) living in the campus of Hohai University. Strain WL0021T was characterized utilizing a polyphasic taxonomy approach. The major fatty acids (> 5%) for strain WL0021T were C16:0 and summed feature 8, and the major polar lipids were diphosphatidylglycerol, phosphatidylethanolamine, phosphatidylglycerol, phosphatidylcholine, phospholipid, two aminolipids, and an unidentified polar lipid. Ubiquinone-10 was detected as the predominant respiratory quinone. The results of 16S rRNA gene phylogenetic analyses revealed that strain WL0021T had the highest sequence similarity of 95.3% to Microvirga flavescens c27j1T and strain WL0021T formed a distinct linage within the family Methylobacteriaceae in the phylogenetic trees. Whole genomic DNA G+C content was 48.3%. Combined with the results from this study, strain WL0021T should represent a novel genus in the family Methylobacteriaceae, for which the name Hohaiivirga grylli gen. nov., sp. nov. (type strain WL0021T=GDMCC 1.2420T =JCM 34655T=MCCC 1K05886T) is proposed.

Maximizing Polysaccharides and Phycoerythrin in Porphyridium purpureum via the Addition of Exogenous Compounds: A Response-Surface-Methodology Approach.

Phycoerythrin and polysaccharides have significant commercial value in medicine, cosmetics, and food industries due to their excellent bioactive functions. To maximize the production of biomass, phycoerythrin, and polysaccharides in Porphyridium purpureum, culture media were supplemented with calcium gluconate (CG), magnesium gluconate (MG) and polypeptides (BT), and their optimal amounts were determined using the response surface methodology (RSM) based on three single-factor experiments. The optimal concentrations of CG, MG, and BT were determined to be 4, 12, and 2 g L-1, respectively. The RSM-based models indicated that biomass and phycoerythrin production were significantly affected only by MG and BT, respectively. However, polysaccharide production was significantly affected by the interactions between CG and BT and those between MG and BT, with no significant effect from BT alone. Using the optimized culture conditions, the maximum biomass (5.97 g L-1), phycoerythrin (102.95 mg L-1), and polysaccharide (1.42 g L-1) concentrations met and even surpassed the model-predicted maximums. After optimization, biomass, phycoerythrin, and polysaccharides concentrations increased by 132.3%, 27.97%, and 136.67%, respectively, compared to the control. Overall, this study establishes a strong foundation for the highly efficient production of phycoerythrin and polysaccharides using P. purpureum.

[Prospective,multi-center,and large-scale hospital centralized monitoring of clinical safety of Reduning Injection in 100249 children cases].

This study utilized a prospective, large-sample, multi-center, and registered key specialty approach of hospitals to monitor the application of Reduning Injection. A total of 100 249 adolescent patients aged 14 years and below who received Reduning Injection were monitored, resulting in 83 cases of adverse events, with 76 of them being classified as adverse drug reaction(ADR). The calculated incidence rate of ADR for Reduning Injection was 0.076%, indicating a very rare ADR. The main symptoms of ADR were pruritus, diarrhea, abdominal pain, vomiting, high fever, dyspnea, convulsion, and chills. All ADR cases were reported for the first time, including three new ADR cases and 73 known ADR cases. The categories of ADR was general ADR. All ADR was mild in severity. There were more males than females in ADR patients. One patient had a history of ADR, and the drug causing ADR was buprofen. The largest number of ADR cases occurred when the dosage of Reduning injection was 5-10 mL. The dropping speed was 30 drops or less per min, and the solvent type was 5% glucose injection. The most common manifestation of ADR patients was pruritus, followed by diarrhea, abdominal pain, vomiting, high fever, dyspnea, convulsions, and chills. 72 patients(94.74% of ADR patients) discontinued the drug, and three patients(3.95% of ADR patients) were given oxygen inhalation. 47 cases(61.84% of ADR patients) were treated with medication, of which dexamethasone was the most used(24 cases, 46.15% of ADR patients). 76 ADR patients were cured or improved. ADRs are more likely to occur when diagnosed with acute bronchitis by western medicine and cough by traditional Chinese medicine(TCM), TCM syndrome type is wind heat syndrome, and the combination medicine is ambroxol hydrochloride and bromhexine hydrochloride injection, ascorbic acid/vitamin C injection. This result provides an evidence-based safety basis for active pharmacovigilance of Reduning Injection in adolescents aged 14 years and below.

[Retrospective study on the diagnosis, treatment, and follow-up of 85 cases of hypophosphatemic rickets in children]. / 85ä¾‹ä½Žè¡€ç£·æ€§ä½å»ç— æ‚£å„¿è¯Šæ–­ã€æ²»ç–—ä¸Žéšè®¿çš„å›žé¡¾æ€§ç ”ç©¶.

OBJECTIVES: To study the diagnosis, treatment, and complications of hypophosphatemic rickets (HR) in children, explore effectiveness evaluation indicators for the disease, and understand the pattern in height growth among these patients. METHODS: A retrospective analysis of the initial clinical data and five-year follow-up data of 85 children with HR treated at Children's Hospital of Nanjing Medical University from January 2008 to December 2022. RESULTS: Among the 85 children with HR, there were 46 males (54%) and 39 females (46%). The age at initial diagnosis ranged from 6 months to 13 years and 9 months, with a median age of 2.75 years. The average height standard deviation score was -2.0±1.1. At initial diagnosis, children exhibited reduced blood phosphate levels and elevated alkaline phosphatase (ALP), with 99% (84/85) presenting with lower limb deformities. The positive rate for PHEX gene mutations was 93% (55/59). One year post-treatment, there was a significant reduction in ALP levels and the gap between the lower limbs (P<0.05). The fastest height growth occurred in the first year after treatment, at 8.23 cm/year, with a peak height velocity (PHV) phase lasting about two years during puberty. The height increased by 9-20 cm in male children during the PHV stage and 10-15 cm in female children. Major complications included nephrocalcinosis and hyperparathyroidism. The incidence rate of nephrocalcinosis in the first year after treatment was 55% (22/40), which increased with the duration of the disease (P<0.001); an increased urinary phosphate/creatinine ratio was positively associated with a higher risk of nephrocalcinosis (OR=1.740, P<0.001). The incidence of hyperparathyroidism in the first year after treatment was 64% (27/42). CONCLUSIONS: For children presenting with lower limb deformities, short stature, and slow growth, early testing for blood levels of phosphate, calcium, and ALP, along with imaging examinations of the lower limbs, can aid in the early diagnosis of HR. Genetic testing may be utilized for definitive confirmation when necessary. ALP combined with improvements in skeletal deformities and annual height growth can serve as indicators of therapeutic effectiveness for HR. Compared to normal children, children with HR demonstrate a lower height increase during the PHV phase, necessitating close follow-up and timely adjustment of treatment plans Citation:Chinese Journal of Contemporary Pediatrics, 2024, 26(7): 677-682.

Paracoccus marinaquae sp. nov., isolated from coastal water of the Yellow Sea.

A Gram-stain-negative, non-motile and coccoid bacterial strain, designated XHP0099T, was isolated from the coastal water of the Yellow Sea, China. Growth occurred at 20-37 â„ƒ (optimum, 28 â„ƒ), pH 5.0-9.0 (optimum, pH 7.0-8.0), and with 0-7.0% NaCl (optimum, 2.0-3.0%). Phylogenetic analysis based on 16S rRNA gene sequences showed that strain XHP0099T was related to members of the genus Paracoccus and shared the highest sequence similarity with "P. siganidrum" M26 (98.2%), followed by P. alkanivorans 4-2 T (97.6%) and P. alkenifer DSM 11593 T (97.4%). The average nucleotide identity, amino acid identity, and digital DNA-DNA hybridization values of strain XHP0099T against related members in the genus Paracoccus were below the cut-off points proposed for the delineation of a novel species. The major cellular fatty acids (> 10%) were summed feature 8 (C18:1 ω7c/C18:1 ω6c), and C18:0. The major isoprenoid quinone was Q-10 and the polar lipids contained diphosphatidylglycerol (DPG), phosphatidylglycerol (PG), phosphatidylethanolamine (PE), phosphatidylcholine (PC), aminolipid (AL) and unidentified polar lipids (L). The G + C content of the genomic DNA of strain XHP0099T was 66.0%. Genomic analysis suggested that strain XHP0099T harbored gene clusters for formaldehyde and the XoxF-type methanol oxidation and type 1 Calvin cycle, which could confer the methylotrophy pathway. Based on the phenotypic, phylogenetic, biochemical and chemotaxonomic analysis, strain XHP0099T represents a novel species of the genus Paracoccus, for which the name Paracoccus marinaquae sp. nov. is proposed. The type strain is XHP0099T (= JCM 34661 T = GDMCC 1.2414 T = MCCC 1K05846T).

Marixanthotalea marina gen. nov., sp. nov., a bacterium in the family Flavobacteriaceae isolated from seawater.

A Gram-stain-negative, yellow-pigmented, non-motile, rod-shaped, catalase-positive, strictly aerobic marine bacterium, designated XHP0103T, was isolated from seawater collected from the southern Yellow Sea, PR China (34° 45' 53″ N 119° 25' 30″ E). Strain XHP0103T grew optimally at 28 °C, pH 7.5 and in 1.0-3.0 % (w/v) sea salt. MK-6 was the major respiratory quinone. The major cellular fatty acids (>10%) were iso-C15 : 0, iso-C15 : 1 G and iso-C17 : 0 3-OH. The polar lipid profile contained phosphatidylethanolamine, an unidentified aminolipid, an unidentified glycolipid and an unidentified lipid. Results of 16S rRNA gene sequence analysis indicated that strain XHP0103T displayed highest sequence similarity to Aestuariibaculum marinum IP7T (94.1 %). However, the phylogenetic trees based on 16S rRNA gene sequences suggested that strain XHP0103T clustered with Tamlana crocina HST1-43T (93.4 % sequence similarity) and Aestuariivivens insulae AH-MY3T (93.5 %). Genome sequencing revealed that strain XHP0103T comprised 3 134 388 bp with 2770 protein-coding genes, and the DNA G+C content was 35.5 %. The average nucleotide identity and digital DNA-DNA hybridization values between strain XHP0103T and T. crocina HST1-43T were 73.6 and 17.3 %, respectively. Based on phylogenetic, phenotypic, genomic and chemotaxonomic evidence, strain XHP0103T represents a novel genus in the family Flavobacteriaceae, for which the name Marixanthotalea marina gen. nov., sp. nov. is proposed. The type strain is XHP0103T (=MCCC 1K06060T=JCM 34682T).

Phospholipase A2 Receptor Antibodies and Clinical Prognosis in Patients with Idiopathic Membranous Nephropathy: An Updated Systematic Review and Meta-Analysis.

BACKGROUND: Idiopathic membranous nephropathy (IMN) is the most common form of primary nephrotic syndrome in adults. Antibodies against the M-type phospholipase A2 receptor (PLA2R-ab) are considered as diagnostic biomarkers of IMN. OBJECTIVE: Here, we performed an updated meta-analysis to assess the diagnostic value of PLA2R-ab for clinical remission in IMN patients. METHOD: PubMed, Embase, and Cochrane databases were searched for relevant studies published before September 2022. Odds ratios and corresponding 95% confidence intervals were determined using a fixed or random effects model. The heterogeneity among studies was explored by subgroup analysis. RESULTS: Sixteen studies involving 1,761 IMN participants were included. There were significant differences between PLA2R-ab (+) and PLA2R-ab (-) patients in terms of complete remission (CR) and spontaneous remission. The rates of partial remission (PR) and relapse were similar between the two groups. Patients with PLA2R-ab (-) were at a higher CR rate when treated with a calcineurin inhibitor or a treatment course for 3 months and 6 months, while the spontaneous remission rate was higher in PLA2R-ab seronegative patients from Asia. However, the CR and spontaneous remission rate only significantly declined in IMN patients with the highest titer, but not a middle titer, when compared to those with the lowest titer. CONCLUSION: In contrast with previous meta-analyses, our results verified that PLA2R-ab can likely predict CR and spontaneous remission in IMN patients, instead of PR and relapse. Race, immunosuppressive agents, and duration of treatment may affect the prognostic value of PLA2R-ab. Considering that the remission rate of IMN patients with a middle level of PLA2R-ab was not different from that of patients with the lowest level, a proper cut-off value of PLA2R-ab for prognosis should be clarified.

Description of Nocardioides jiangsuensis sp. nov., and Proposal for Reclassification of the Genus Marmoricola as Nocardioides.

A Gram-staining-positive, non-motile, aerobic, spherical actinobacterium, designated WL0053T, was isolated from the coastal sediment of Nantong City, Jiangsu Province, China. The 16S rRNA gene sequence of strain WL0053T exhibited the highest similarities to Nocardioides mesophilus MSL-22T (98.0%), N. massiliensis GD12T (97.8%), Marmoricola bigeumensis MSL-05T (97.6%), and N. jensenii DSM 20641T (97.3%). The polyphasic taxonomic approach was used for the identification of strain WL0053T. This strain formed white, round, and smooth colonies and grew in the presence of 0-18% (w/v) NaCl (optimum, 0-4.0%), at pH 6.0-9.0 (optimum, pH 7.0) and at 20-37 °C (optimum, 28 °C). The main cellular fatty acids comprised of C17:1 ω8c, C18:1 ω9c, and iso-C16:0. The genomic DNA G + C content was 71.9%. The predominant quinone was MK-8(H4), and the major polar lipid consisted of phosphatidylcholine, glycolipid, phosphatidylethanolamine, and two unidentified phospholipids. Phylogenetic trees of 16S rRNA gene and bac120 gene set indicted that strain WL0053T was closely related to the species N. iriomotensis and N. mesophilus, while these two species clustered in a separate clade together with M. caldifontis YIM 730233T in the bac120 tree. Combined with the analysis of average nucleotide identity (ANI), average amino acid identity (AAI), and digital DNA-DNA hybridization (dDDH), it can be considered that the strain WL0053T is a new member of the genus Nocardioides and is proposed to be named as Nocardioides jiangsuensis sp. nov.. The type strain is WL0053T (=MCCC 1K05897T=JCM 34671T=GDMCC 4.192T). Furthermore, based on the fact that the genera Nocardioides and Marmoricola both appeared polyphyletic with no significant difference on phenotypic and chemotaxonomic traits, we proposed to reclassify the genus Marmoricola as Nocardioides.

Relationship between gut microbiota and vascular calcification in hemodialysis patients.

INTRODUCTION: Vascular calcification (VC) is an independent risk factor for cardiovascular mortality in end-stage renal disease (ESRD) patients. The pathogenesis of VC is complicated and unclear. Uremic toxins produced by gut microbiota can promote VC. This study aims to identify the differences in gut microbiota between the different VC groups and the main bacteria associated with VC in hemodialysis (HD) patients in an attempt to open up new preventive and therapeutic approaches and define the probable mechanism for VC in HD patients in the future. METHODS: A total of 73 maintenance HD patients were enrolled in this cross-sectional study. According to the abdominal aortic calcification (AAC) scores, the participants were divided into the high AAC score group and the low AAC score group. High-throughput sequencing of the gut microbiota was performed and the results were evaluated by alpha diversity, beta diversity, species correlation, and model predictive analyses. RESULTS: The prevalence of VC was 54.79% (40/73) in the study. The majority of phyla in the two groups were the same, including Firmicutes, Actinobacteriota, Proteobacteria, and Bacteroidota. The microbial diversity in the high AAC score group had a decreasing trend (p = 0.050), and the species abundance was significantly lower (p = 0.044) than that in the low AAC score group. The HD patients with high AAC scores showed an increased abundance of Proteobacteria and decreased abundances of Bacteroidota and Synergistota at the phylum level; increased abundances of Escherichia-Shigella, Ruminococcus_gnavus_group, and Lactobacillus; and decreased abundances of Ruminococcus and Lachnospiraceae_NK4A136_group at the genus level (p<0.05). Escherichia-Shigella and Ruminococcus_gnavus_group were positively correlated with VC, and Ruminococcus, Adlercreutzia, Alistipes, and norank_f__Ruminococcaceae were negatively correlated with VC. Escherichia-Shigella had the greatest influence on VC in HD patients, followed by Ruminococcus and Butyricimonas. CONCLUSIONS: Our results provide clinical evidence that there was a difference in gut microbiota between the different VC groups in HD patients. Escherichia-Shigella, a lipopolysaccharide (LPS)-producing bacterium, was positively correlated with VC and had the greatest influence on VC. Ruminococcus, a short-chain fatty acid (SCFA)-producing bacterium, was negatively correlated with VC and had the second strongest influence on VC in HD patients. The underlying mechanism is worth studying. These findings hint at a new therapeutic target.

[Value of serum fibroblast growth factor 23 in diagnosis of hypophosphatemic rickets in children]. / è¡€æ¸ æˆçº¤ç»´ç»†èƒžç”Ÿé•¿å› å­23å¯¹å„¿ç«¥ä½Žè¡€ç£·æ€§ä½å»ç— çš„è¯Šæ–­ä»·å€¼ç ”ç©¶.

OBJECTIVES: To study the value of serum fibroblast growth factor 23 (FGF23) in the diagnosis of hypophosphatemic rickets in children. METHODS: A total of 28 children who were diagnosed with hypophosphatemic rickets in Children's Hospital of Nanjing Medical University from January 2016 to June 2021 were included as the rickets group. Forty healthy children, matched for sex and age, who attended the Department of Child Healthcare of the hospital were included as the healthy control group. The serum level of FGF23 was compared between the two groups, and the correlations of the serum FGF23 level with clinical characteristics and laboratory test results were analyzed. The value of serum FGF23 in the diagnosis of hypophosphatemic rickets was assessed. RESULTS: The rickets group had a significantly higher serum level of FGF23 than the healthy control group (P<0.05). In the rickets group, the serum FGF23 level was positively correlated with the serum alkaline phosphatase level (rs=0.38, P<0.05) and was negatively correlated with maximum renal tubular phosphorus uptake/glomerular filtration rate (rs=-0.64, P<0.05), while it was not correlated with age, height Z-score, sex, and parathyroid hormone (P>0.05). Serum FGF23 had a sensitivity of 0.821, a specificity of 0.925, an optimal cut-off value of 55.77 pg/mL, and an area under the curve of 0.874 in the diagnosis of hypophosphatemic rickets (P<0.05). CONCLUSIONS: Serum FGF23 is of valuable in the diagnosis of hypophosphatemic rickets in children, which providing a theoretical basis for early diagnosis of this disease in clinical practice.

Genetic spectrum of CAKUT and risk factors for kidney failure: a pediatric multicenter cohort study.

BACKGROUND: Congenital anomalies of the kidney and urinary tracts (CAKUT) are the leading cause of kidney failure in children with phenotypic and genotypic heterogeneity. Our objective was to describe the genetic spectrum and identify the risk factors for kidney failure in children with CAKUT. METHODS: Clinical and genetic data were derived from a multicenter network (Chinese Children Genetic Kidney Disease Database, CCGKDD) and the Chigene database. A total of 925 children with CAKUT who underwent genetic testing from 2014 to 2020 across China were studied. Data for a total of 584 children wereobtained from the CCGKDD, including longitudinal data regarding kidney function. The risk factors for kidney failure were determined by the Kaplan-Meier method and Cox proportional hazards models. RESULTS: A genetic diagnosis was established in 96 out of 925 (10.3%) children, including 72 (8%) with monogenic variants, 20 (2%) with copy number variants (CNVs), and 4 (0.4%)with major chromosomal anomalies. Patients with skeletal abnormalities were more likely to have large CNVs or abnormal karyotypes than monogenic variants. Eighty-two patients from the CCGKDD progressed to kidney failure at a median age of 13.0 (95% confidence interval, 12.4-13.6) years, and twenty-four were genetically diagnosed with variants of PAX2, TNXB, EYA1, HNF1B and GATA3 or the 48, XXYY karyotype. The multivariate analysis indicated that solitary kidney, posterior urethral valves, bilateral hypodysplasia, the presence of certain variants and premature birth were independent prognostic factors. CONCLUSIONS: The genetic spectrum of CAKUT varies among different subphenotypes. The identified factors indicate areas that require special attention.

Aestuariicella albida sp. nov., isolated from surface water of the Yellow Sea, and proposal of the genus Aestuariicella as a member of the family Cellvibrionaceae.

A Gram-stain-negative, non-motile and aerobic bacterium, designated HHU G3-2T, was isolated from surface water of the Yellow Sea, PR China. Strain HHU G3-2T was positive for oxidase activity and negative for catalase. Optimal growth occurred at 28 °C (range, 20-37 °C), pH 7.0 (range, pH 6.0-9.0) and in the presence of 2-5 % (w/v) NaCl (range, 1-7%). Phylogenetic analysis based on 16S rRNA gene sequences and 120 ubiquitous single-copy protein-coding genes indicated that strain HHU G3-2T formed a distinct phylogenetic lineage with Aestuariicella hydrocarbonica JCM 30134T, sharing a 16S rRNA gene sequence similarity of 98.05%. Average nucleotide identity and digital DNA-DNA hybridization values between strain HHU G3-2T and A. hydrocarbonica JCM 30134T were 75.74 and 17.80%, respectively, which were below the threshold values of 95-96 and 70 %, respectively. The DNA G+C content of the genomic DNA was 51.17 mol%. The major fatty acids (>10 %) were C17 : 1 ω8c (19.8 %), summed feature 3 (C16 : 1 ω7c/C16 : 1 ω6c; 15.9 %), summed feature 8 (C18 : 1 ω7c/C18 : 1 ω6c; 13.8 %) and C17 : 0 (10.3 %). The predominant isoprenoid quinone was ubiquinone-8. The polar lipid profile consisted of diphosphatidylglycerol, phosphatidylethanolamine and phosphatidylglycerol. Based on the polyphasic taxonomic data, strain HHU G3-2T represents a novel species of the genus Aestuariicella, for which the name Aestuariicella albida sp. nov. is proposed. The type strain is HHU G3-2T (=MCCC 1K04224T=JCM 34652T=GDMCC 1.2418T=CGMCC 1.17397T). In addition, we proposed the genus Aestuariicella as a member of the family Cellvibrionaceae.

Association of abdominal aortic calcification with longitudinal changes in left ventricular mass of patients on hemodialysis and its prognostic value.

Vascular calcification (VC) and myocardial hypertrophy are very common in patients on hemodialysis (HD). Previous studies have only assessed the cross-sectional associations of VC with left ventricular mass (LVM) and the predictive value of individual factors. The present study investigated the relationship between abdominal aortic calcification (AAC) and LVM increment over time, and the combined effect of these factors on the outcomes of HD patients. 104 HD patients were enrolled. AAC scores were evaluated on left lateral lumbar spine radiographs. Echocardiography was performed to calculate the LVM changes during a 2-year period. At baseline, 91 patients (87.5%) had varying degrees of AAC (median score 6.0, range 2.0 - 11.0). After 2 years, the mean LVM change was 7.49 g (range -5.03 - 26.00 g), and 68 patients (65%) had an increased LVM. Patients with higher baseline AAC scores had significantly larger LVM and LVM index increments. Patients with increased LVM had significantly higher baseline AAC scores and hemoglobin, serum phosphate, and hypersensitive C-reactive protein levels. Multiple stepwise linear regression demonstrated that the baseline AAC was the only independent predictor of increased LVM after 2 years. 28 patients (26.9%) died in the subsequent 5 years. Patients with lower baseline AAC scores had a significantly higher cumulative survival rate than those with higher AAC scores. However, the LVM change (either alone or in combination with the AAC score) had no significant effect on survival. In conclusion, AAC is an independent predictor of LVM increase over time in HD patients. Prevention and treatment of VC may be a promising intervention target to improve left ventricular remodeling and outcomes in HD patients.

Hyphomonas sediminis sp. nov., isolated from marine sediment.

A Gram-staining-negative, aerobic and pear-shaped bacterial strain, designated WL0036T, was isolated from coastal sediment sample collected in Nantong city, Jiangsu province of China (120° 51' 13″ E, 32° 6' 26″ N) in October 2020. Strain WL0036T was found to grow at 20-37 °C (optimum, 28 °C) with 0-9.0% NaCl (optimum, 2.5-4.0%) and displayed alkaliphilic growth with the pH range of pH 6.0-10.0 (optimum, pH 7.0-8.0). The polar lipids profile of strain WL0036T included phosphatidylcholine, phosphatidylethanolamine, glycolipid and an unidentified lipid. The major isoprenoid quinone was determined to be Q-11 and the major fatty acids were C16:0, 11-methyl-C18:1ω7c, and summed features 8 (C18:1ω6c and/or C18:1ω7c). The G + C content of genomic DNA was 61.8%. Phylogenetic trees constructed based on 16S rRNA gene sequence and bac120 gene set (a collection of 120 single-copy protein sequences prevalent in bacteria) indicted that strain WL0036T clustered with strains Hyphomonas neptunium ATCC 15444T and H. polymorpha PS728T. The average nucleotide identities between strain WL0036T and strains H. neptunium ATCC 15444T and H. polymorpha PS728T were 80.7% and 81.2%, respectively. Strain WL0036T showed 22.8% and 23.2% of digital DNA-DNA hybridization identities with H. neptunium ATCC 15444T and H. polymorpha PS728T, respectively. As inferred from the phenotypic and genotypic characteristics and the phylogenetic trees, strain WL0036T ought to be recognized as a novel species in genus Hyphomonas, for which the name Hyphomonas sediminis sp. nov. is proposed. The type strain is WL0036T (= MCCC 1K05843T = JCM 34658T = GDMCC 1.2413T).

Relationships among the Dosage of Erythropoiesis-Stimulating Agents, Erythropoietin Resistance Index, and Mortality in Maintenance Hemodialysis Patients.

BACKGROUND: Erythropoiesis-stimulating agents (ESAs) constitute an important treatment option for anemia in hemodialysis (HD) patients. We investigated the relationships among the dosage of ESA, erythropoietin resistance index (ERI) scores, and mortality in Chinese MHD patients. METHODS: This multicenter observational retrospective study included MHD patients from 16 blood purification centers (n = 824) who underwent HD in 2011-2015 and were followed up until December 31, 2016. We collected demographic variables, HD parameters, laboratory values, and ESA dosages. Patients were grouped into quartiles according to ESA dosage to study the effect of ESA dosage on all-cause mortality. The ERI was calculated as follows: ESA (IU/week)/weight (kg)/hemoglobin levels (g/dL). We also compared outcomes among the patients stratified into quartiles according to ERI scores. We used the Cox proportional hazards model to measure the relationships between the ESA dosage, ERI scores, and all-cause mortality. Using propensity score matching, we compared mortality between groups according to ERI scores, classified as either > or ≤12.80. RESULTS: In total, 824 patients were enrolled in the study; 200 (24.3%) all-cause deaths occurred within the observation period. Kaplan-Meier analyses showed that patients administered high dosages of ESAs had significantly worse survival than those administered low dosages of ESAs. A multivariate Cox regression identified that high dosages of ESAs could significantly predict mortality (ESA dosage >10,000.0 IU/week, HR = 1.59, 95% confidence intervals (CIs) (1.04, 2.42), and p = 0.031). Our analysis also indicated a significant increase in the risk of mortality in patients with high ERI scores. Propensity score matching-analyses confirmed that ERI > 12.80 could significantly predict mortality (HR = 1.56, 95% CI [1.11, 2.18], and p = 0.010). CONCLUSIONS: Our data suggested that ESA dosages >10,000.0 IU/week in the first 3 months constitute an independent predictor of all-cause mortality among Chinese MHD patients. A higher degree of resistance to ESA was related to a higher risk of all-cause mortality.

Sphingopyxis jiangsuensis sp. nov. Isolated From the Surface Water of the Yellow Sea.

A novel bacterium, designated strain XHP0097T, was isolated from the surface water of the Yellow Sea, China. The cells were Gram-stain-negative, aerobic, rod-shaped, yellow-colored, and non-motile on 2216E agar. Optimal growth of strain XHP0097T occurs at 28 °C and pH 7.0 with the presence of NaCl concentration 2% (w/v). According to the analysis of comparative 16S rRNA gene sequence, strain XHP0097T showed the highest 16S rRNA gene sequence similarity with Sphingopyxis panaciterrulae KCTC 22112T (98.2%). Phylogenetic analysis based on 16S rRNA gene sequences as well as on 120 ubiquitous single-copy protein-coding genes supported that strain XHP0097T formed a distinct phyletic lineage as a new species within the genus Sphingopyxis. Strain XHP0097T showed an average nucleotide identity value and a digital DNA-DNA hybridization (dDDH) of 79.1-81.7% and 21.9-24.4% to the members of the genus Sphingopyxis, respectively. According to genome sequence, the DNA G + C content of XHP0097T was 64.8%. The major fatty acids (>10%) were C16:0 (17.5%), summed feature 3 (C16:1ω7c and/or C16:1ω6c) (15.1%), and summed feature 8 (C18:1ω7c and/or C18:1ω6c) (19.2%). The major polar lipids of strain XHP0097T were phosphatidylcholine (PC), phosphatidylethanolamine (PE), phosphatidylglycerol (PG), diphosphatidylglycerol (DPG), and sphingoglycolipid (SGL). Q-10 was the predominant respiratory quinone. Characteristics of physiological and biochemical, phylogenetic, and chemotaxonomic analysis demonstrated the isolate XHP0097T represents a novel species of the genus Sphingopyxis, for which the name Sphingopyxis jiangsuensis sp. nov. is proposed. The type strain is XHP0097T (=MCCC 1K05845T = GDMCC 1.2415T = JCM 34678T).

The Signaling Pathways and Targets of Natural Compounds from Traditional Chinese Medicine in Treating Ischemic Stroke.

Ischemic stroke (IS) is a common neurological disorder associated with high disability rates and mortality rates. At present, recombinant tissue plasminogen activator (r-tPA) is the only US(FDA)-approved drug for IS. However, due to the narrow therapeutic window and risk of intracerebral hemorrhage, r-tPA is currently used in less than 5% of stroke patients. Natural compounds have been widely used in the treatment of IS in China and have a wide range of therapeutic effects on IS by regulating multiple targets and signaling pathways. The keywords "ischemia stroke, traditional Chinese Medicine, Chinese herbal medicine, natural compounds" were used to search the relevant literature in PubMed and other databases over the past five years. The results showed that JAK/STAT, NF-κB, MAPK, Notch, Nrf2, and PI3K/Akt are the key pathways, and SIRT1, MMP9, TLR4, HIF-α are the key targets for the natural compounds from traditional Chinese medicine in treating IS. This study aims to update and summarize the signaling pathways and targets of natural compounds in the treatment of IS, and provide a base of information for the future development of effective treatments for IS.

[New mechanisms of chronic kidney disease-associated vascular calcification].

Vascular calcification is the crucial factor of high cardiovascular disease morbidity and mortality in patients with chronic kidney disease (CKD), which causes a huge medical and economic burden. It is urgent to explore its pathogenesis and intervention methods. CKD-associated vascular calcification is an ectopic osteogenesis process actively regulated by multiple cells. Vascular smooth muscle cells (VSMCs) undergo osteogenic differentiation in a pro-calcification environment, and secrete matrix vesicles to form calcium and phosphorus crystal deposition sites, which are key events in the development of CKD-associated vascular calcification. This article reviews the new mechanism and technology of CKD-associated vascular calcification and discusses the role of the myokine Irisin in CKD-associated vascular calcification.