The Cambrian microfossil Qingjiangonema reveals the co-evolution of sulfate-reducing bacteria and the oxygenation of Earth's surface.

Sulfate reduction is an essential metabolism that maintains biogeochemical cycles in marine and terrestrial ecosystems. Sulfate reducers are exclusively prokaryotic, phylogenetically diverse, and may have evolved early in Earth's history. However, their origin is elusive and unequivocal fossils are lacking. Here we report a new microfossil, Qingjiangonema cambria, from ∼518-million-year-old black shales that yield the Qingjiang biota. Qingjiangonema is a long filamentous form comprising hundreds of cells filled by equimorphic and equidimensional pyrite microcrystals with a light sulfur isotope composition. Multiple lines of evidence indicate Qingjiangonema was a sulfate-reducing bacterium that exhibits similar patterns of cell organization to filamentous forms within the phylum Desulfobacterota, including the sulfate-reducing Desulfonema and sulfide-oxidizing cable bacteria. Phylogenomic analyses confirm separate, independent origins of multicellularity in Desulfonema and in cable bacteria. Molecular clock analyses infer that the Desulfobacterota, which encompass a majority of sulfate-reducing taxa, diverged ∼2.41 billion years ago during the Paleoproterozoic Great Oxygenation Event, while cable bacteria diverged ∼0.56 billion years ago during or immediately after the Neoproterozoic Oxygenation Event. Taken together, we interpret Qingjiangonema as a multicellular sulfate-reducing microfossil and propose that cable bacteria evolved from a multicellular filamentous sulfate-reducing ancestor. We infer that the diversification of the Desulfobacterota and the origin of cable bacteria may have been responses to oxygenation events in Earth's history.

A multicenter clinical AI system study for detection and diagnosis of focal liver lesions.

Early and accurate diagnosis of focal liver lesions is crucial for effective treatment and prognosis. We developed and validated a fully automated diagnostic system named Liver Artificial Intelligence Diagnosis System (LiAIDS) based on a diverse sample of 12,610 patients from 18 hospitals, both retrospectively and prospectively. In this study, LiAIDS achieved an F1-score of 0.940 for benign and 0.692 for malignant lesions, outperforming junior radiologists (benign: 0.830-0.890, malignant: 0.230-0.360) and being on par with senior radiologists (benign: 0.920-0.950, malignant: 0.550-0.650). Furthermore, with the assistance of LiAIDS, the diagnostic accuracy of all radiologists improved. For benign and malignant lesions, junior radiologists' F1-scores improved to 0.936-0.946 and 0.667-0.680 respectively, while seniors improved to 0.950-0.961 and 0.679-0.753. Additionally, in a triage study of 13,192 consecutive patients, LiAIDS automatically classified 76.46% of patients as low risk with a high NPV of 99.0%. The evidence suggests that LiAIDS can serve as a routine diagnostic tool and enhance the diagnostic capabilities of radiologists for liver lesions.

Phenotypic and genotypic characterization of Marinobacterium weihaiense sp. nov. and Marinobacterium marinum sp. nov., isolated from marine sediment, and genomic properties of the genus Marinobacterium.

In this study, two novel bacterial strains were isolated from coastal sediment of Weihai, China. The two strains were Gram-stain-negative and facultatively aerobic, designated 3-1745T and A346T. Based on phenotypic, genetic and phylogenetic properties, strains 3-1745T and A346T represent two novel species of the genus Marinobacterium. The results of genome analysis revealed many central carbohydrate metabolism pathways such as gluconeogenesis, pyruvate oxidation, tricyclic acid cycle, pentose phosphate pathway and PRPP biosynthesis in the genus Marinobacterium. The ability of strains 3-1745T and A346T to utilize volatile fatty acids was experimentally confirmed. Polyhydroxyalkanoate synthases (PhaA, PhaB and PhaC) for the synthesis of polyhydroxyalkanoates were prevalent in the genus Marinobacterium. Multiple BGCs (biosynthetic gene clusters) including betalactone, ectoine, ranthipeptide, redox-cofactor, RiPPs (ribosomally synthesized post-translationally modified peptides) and T3PKS (polyketide synthases) in the genome of the genus Marinobacterium were found. Additional genome analyses suggested that the genus Marinobacterium contained diverse potential mechanisms of salt tolerance and mainly utilized oligosaccharides. This is the first report on broad genomic analyses of the genus Marinobacterium with the description of two novel species and potential ecological and biotechnological implications.

Effect and mechanism of needleless transcutaneous neuromodulation on gastrointestinal function after pancreaticoduodenectomy.

BACKGROUND: Gastrointestinal motility disorders tend to develop after pancreaticoduodenectomy (PD). The objectives of this study were: (1) to investigate the impact of needleless transcutaneous neuromodulation (TN) on the postoperative recuperation following pancreaticoduodenectomy (PD), and (2) to explore the underlying mechanisms by which TN facilitates the recovery of gastrointestinal function after PD. METHODS: A total of 41 patients scheduled for PD were randomized into two groups: the TN group (n = 21) and the Sham-TN group (n = 20). TN was performed at acupoints ST-36 and PC-6 twice daily for 1 h from the postoperative day 1 (POD1) to day 7. Sham-TN was performed at non-acupoints. Subsequent assessments incorporated both heart rate variation and dynamic electrogastrography to quantify alterations in vagal activity (HF) and gastric pacing activity. RESULTS: 1)TN significantly decreased the duration of the first passage of flatus (p < 0.001) and defecation (p < 0.01) as well as the time required to resume diet (p < 0.001) when compared to sham-TN;2)Compared with sham-TN, TN increased the proportion of regular gastric pacing activity (p < 0.01);3) From POD1 to POD7, there was a discernible augmentation in HF induced by TN stimulation(p < 0.01);4) TN significantly decreased serum IL-6 levels from POD1 to POD7 (p < 0.001);5) TN was an independent predictor of shortened hospital stay(ß = - 0.349, p = 0.035). CONCLUSION: Needleless TN accelerates the recovery of gastrointestinal function and reduces the risk of delayed gastric emptying in patients after PD by enhancing vagal activity and controlling the inflammatory response.

An intrusion and environmental effects of man-made silver nanoparticles in cold seeps.

Silver nanoparticles (AgNPs) are among the most widely used metal-based engineered nanomaterials in biomedicine and nanotechnology, and account for >50 % of global nanomaterial consumer products. The increasing use of AgNPs potentially causes marine ecosystem changes; however, the environmental impacts of man-made AgNPs are still poorly studied. This study reports for the first time that man-made AgNPs intruded into cold seeps, which are important marine ecosystems where hydrogen sulfide, methane, and other hydrocarbon-rich fluid seepage occur. Using a combination of electron microscopy, geochemical and metagenomic analyses, we found that in the cold seeps with high AgNPs concentrations, the relative abundance of genes associated with anaerobic oxidation of methane (AOM) was lower, while those related to the sulfide oxidizing and sulfate reducing were higher. This suggests that AgNPs can stimulate the proliferation of sulfate-reducing and sulfide-oxidizing bacteria, likely due to the effects of activating repair mechanisms of the cells against the toxicant. A reaction of AgNPs with hydrogen sulfide to form silver sulfide could also effectively reduce the amount of available sulfate in local ecosystems, which is generally used as the AOM oxidant. These novel findings indicate that man-made AgNPs may be involved in the biogeochemical cycles of sulfur and carbon in nature, and their potential effects on the releasing of methane from the marine methane seeps should not be ignored in both scientific and environmental aspects.

The disparity in hesitancy toward COVID-19 vaccination between older individuals in nursing homes and those in the community in Taizhou, China.

PURPOSE: Older individuals are priority coronavirus disease 2019 (COVID-19) vaccine recipients. Our aim was to investigate the prevalence of and factors influencing vaccine hesitancy in older individuals living in nursing homes and communities. METHODS: A self-administered COVID-19 vaccine hesitancy survey was conducted from September 2021 to December 2021 among people aged ≥ 60 years in eight nursing homes (382 participants) and the community (112 participants) in Taizhou, China. The response rate was 72.1% (382/530) for older adults in nursing homes and 68.7% (112/163) for older adults in the community. RESULTS: We found that 58.1% of the older individuals in nursing homes and 36.6% of those in the community were hesitant to receive the COVID-19 vaccine and that there was a statistically significant difference (P < 0.001). Multiple logistic regression results indicated that the main factors influencing hesitation among the older individuals in nursing homes were being male (Odds Ratio (OR) = 1.67, 95% Confidence Interval (CI): 1.01-2.76); their cognitive level, including having a high perceived risk of COVID-19 infection (OR = 3.06, 95% CI: 1.73-5.43) or the perception of low vaccine safety (OR = 3.08, 95% CI: 1.545- 6.145); anxiety (OR = 3.43, 95% CI: 1.96-5.99); and no previous influenza vaccination (OR = 1.82, 95% CI: 1.13-2.93); whereas those for older individuals in the community were comorbid chronic diseases (OR = 3.13, 95% CI: 1.11- 8.78) and community workers not recommending the vaccine (OR = 8.223, 95% CI: 1.77-38.27). CONCLUSION: The proportion of older individuals in nursing homes who were hesitant to receive the COVID-19 vaccine was significantly higher than for older individuals in the community. Targeted measures should be implemented to reduce vaccine hesitancy and improve vaccination rates in response to the special environment of nursing homes and the characteristics of this population.

Phylogenetics and biomineralization of a novel magnetotactic Gammaproteobacterium from a freshwater lake in Beijing, China.

Magnetotactic bacteria (MTB) have the remarkable capability of producing intracellularly membrane-enveloped magnetic nanocrystals (i.e. magnetosomes) and swimming along geomagnetic field lines. Despite more than 50 years of research, bacterial diversity and magnetosome biomineralization within MTB are relatively less known in the Gammaproteobacteria class than other groups. This is incompatible with the status of Gammaproteobacteria as the most diverse class of gram-negative bacteria with a number of ecologically important bacteria. Here, we identify a novel MTB strain YYHR-1 affiliated with the Gammaproteobacteria class of the Pseudomonadota phylum from a freshwater lake. In YYHR-1, most magnetosome crystals are organized into a long chain aligned along the cell long axis; unusually, a few small superparamagnetic crystals are located at the side of the chain, off the main chain axis. Micromagnetic simulations indicate that magnetostatic interactions among adjacent crystals within a chain reduce the Gibbs energy to enhance chain stability. Genomic analysis suggests that duplication of magnetosome gene clusters may result in off-chain magnetosomes formation. By integrating available genomic data from Gammaproteobacteria, the phylogenetic position of MTB in this class is reassigned here. Our new findings expand knowledge about MTB diversity and magnetosome biomineralization, and deepen understanding of the phylogenetics of the Gammaproteobacteria.

Clip migration complicated by choledocholithiasis after laparoscopic biliary surgery: a report of four cases.

BACKGROUND: Migration of tissue clips into the common bile duct and formation of common bile duct stones after laparoscopic biliary surgery are extremely rare complications, and their etiologies remain elusive. We herein report four cases of migrated clips complicated by stones after laparoscopic biliary surgery. CASE PRESENTATION: Two patients (72- and 62-year-old women) were admitted because of varying degrees of epigastric pain, and two patients (88- and 69-year-old men) were admitted because of epigastric pain with chills and fever. They had previously undergone laparoscopic cholecystectomy (LC) plus laparoscopic common bile duct exploration (LCBDE) in our hospital. In Cases 1, 2, and 4, surgery revealed gallbladder triangle adhesion, inflamed dilated bile ducts, and fragile tissues. Blood tests showed elevated liver enzymes and bilirubin. Imaging indicated common bile duct stones. All patients underwent successful surgery with Hem-o-lok clips. No postoperative pain recurred. CONCLUSION: Clip migration after laparoscopic biliary surgery may be associated with preoperative biliary duct inflammation, improper use of tissue clips, and postoperative biliary leak-induced inflammation. The clinical presentation is similar to that of calculous cholangitis. Once symptoms of cholangitis appear in patients with a history of LC or LCBDE, the possibility of clip migration and stone formation should be considered.

Key gene networks that control magnetosome biomineralization in magnetotactic bacteria.

Magnetotactic bacteria (MTB) are a group of phylogenetically and morphologically diverse prokaryotes that have the capability of sensing Earth's magnetic field via nanocrystals of magnetic iron minerals. These crystals are enclosed within intracellular membranes or organelles known as magnetosomes and enable a sensing function known as magnetotaxis. Although MTB were discovered over half a century ago, the study of the magnetosome biogenesis and organization remains limited to a few cultured MTB strains. Here, we present an integrative genomic and phenomic analysis to investigate the genetic basis of magnetosome biomineralization in both cultured and uncultured strains from phylogenetically diverse MTB groups. The magnetosome gene contents/networks of strains are correlated with magnetic particle morphology and chain configuration. We propose a general model for gene networks that control/regulate magnetosome biogenesis and chain assembly in MTB systems.

Construction and validation of an immune-related LncRNA prognostic model for hepatocellular carcinoma.

Herein, based on mRNA data from TCGA database, hepatocellular carcinoma (HCC) samples were subjected to a single-sample Gene Set Enrichment Analysis (ssGSEA). Then, HCC samples were finally classified into high-, middle-, and low-immunity groups using K-means consensus clustering (K = 3) according to ssGSEA scores. After the tumor microenvironment of HCC patients was further analyzed using ESTIMATE algorithm, the results indicated high immune score, stromal score, ESTIMATE score and low tumor purity in high-immunity group. HLA family genes and PD-L1(CD274) were remarkably highly expressed in high-immunity group. Immune-related lncRNAs were required by analyzing differentially expressed genes in high- and low-immunity groups. Differential expression analysis was undertaken on HCC samples, with normal samples as the control. After immune-related lncRNAs and differentially expressed lncRNAs were intersected, 321 differentially expressed immune-related lncRNAs were acquired. Later, the prognostic model based on immune-related lncRNAs was obtained following the Cox regression analysis of previous samples. According to the riskScore, the samples in TCGA-LIHC were divided into high- and low-risk groups. Kaplan-Meier survival analysis, ROC curve, and independence analysis confirmed that the immune-related lncRNAs prognostic model was an important factor independent from clinical characteristics. We further analyzed the difference in immune microenvironment and mutational landscapes in both risk groups. Prominent differences were shown in multiple immunity-related gene sets and immune cells in both groups. The mutation rate of TP53 in high-risk group was much higher than the low-risk one. All these conclusions offered references to prognostic evaluations and personalized treatments for patients with HCC.

Identification of sulfate-reducing magnetotactic bacteria via a group-specific 16S rDNA primer and correlative fluorescence and electron microscopy: Strategy for culture-independent study.

Magnetotactic bacteria (MTB) biomineralize intracellular magnetic nanocrystals and swim along geomagnetic field lines. While few axenic MTB cultures exist, living cells can be separated magnetically from natural environments for analysis. The bacterial universal 27F/1492R primer pair has been used widely to amplify nearly full-length 16S rRNA genes and to provide phylogenetic portraits of MTB communities. However, incomplete coverage and amplification biases inevitably prevent detection of some phylogenetically specific or non-abundant MTB. Here, we propose a new formulation of the upstream 390F primer that we combined with the downstream 1492R primer to specifically amplify 1100-bp 16S rRNA gene sequences of sulfate-reducing MTB in freshwater sediments from Lake Weiyanghu, Xi'an, northwestern China. With correlative fluorescence in situ hybridization and scanning/transmission electron microscopy, three novel MTB strains (WYHR-2, WYHR-3 and WYHR-4) from the Desulfobacterota phylum were identified phylogenetically and structurally at the single-cell level. Strain WYHR-2 produces bullet-shaped magnetosome magnetite, while the other two strains produce both cubic/prismatic greigite and bullet-shaped magnetite. Our results expand knowledge of bacterial diversity and magnetosome biomineralization of sulfate-reducing MTB. We also propose a general strategy for identifying and characterizing uncultured MTB from natural environments.

Salibaculum halophilum gen. nov., sp. nov. and Salibaculum griseiflavum sp. nov., in the family Rhodobacteraceae.

Two Gram-stain-negative, moderately halophilic, non-motile, rod-shaped, pale yellow, and aerobic strains, designated WDS1C4T and WDS4C29T, were isolated from a marine solar saltern in Weihai, Shandong Province, PR China. Growth of strain WDS1C4T occurred at 10-45 °C (optimum, 37 °C), with 4-16 % (w/v) NaCl (optimum, 8 %) and at pH 6.5-9.0 (optimum, pH 7.5). Growth of strain WDS4C29T occurred at 10-45 °C (optimum, 40 °C), with 2-18 % (w/v) NaCl (optimum, 6 %) and at pH 6.5-9.0 (optimum, pH 7.5). Q-10 was the sole respiratory quinone of the two strains. The major polar lipids of strains WDS1C4T and WDS4C29T were phosphatidylglycerol, phosphatidylethanolamine and phosphatidylcholine. The major cellular fatty acid in strains WDS1C4T and WDS4C29T was C18 : 1 ω7c, and the genomic DNA G+C contents of strains WDS1C4T and WDS4C29T were 67.6 and 63.3 mol%, respectively. Phylogenetic analyses based on 16S rRNA gene sequences indicated that strains WDS1C4T and WDS4C29T were members of the family Rhodobacteraceae and showed 94.3 and 95.3 % similarities to their closest relative, Celeribacter indicus, respectively. The similarity between WDS1C4T and WDS4C29T was 97.3 %. Differential phenotypic and genotypic characteristics of the two isolates from recognized genera showed that the two strains should be classified as representing two novel species in a new genus for which the names Salibaculum halophilum gen. nov., sp. nov. (type species, type strain WDS1C4T=MCCC 1H00179T=KCTC 52542T) and Salibaculum griseiflavum sp. nov. (WDS4C29T=MCCC 1H00175T=KCTC 52541T) are proposed.

Salegentibacter maritimus sp. nov., isolated from marine coastal sediment.

Two bacterial strains were isolated from a marine sediment sample taken from Jingzi Wharf, Weihai, China. These two strains were characterized at the phenotypic, chemotaxonomic, and genomic level. The two strains possessed almost identical 16S rRNA gene sequences (99.9 %). However, RAPD-PCR fingerprint patterns discriminated that they were not from one clonal origin. The average nucleotide identity (ANI) value and the digital DNA-DNA hybridization (dDDH) value between the two strains were 98.3 % and 85.4 %, respectively, suggestingthat they belonged to the same species. On the basis of the result of phylogenetic analysis of the 16S rRNA gene sequences, the two strains belonged to the genus Salegentibacter and were closely related to S. holothuriorum KCTC 12371T (98.6 %) and S. salegens DSM 5424T (98.2-98.3 %). The ANI and dDDH clearly separated strains F63223T and F60176 from the the most related type strains with values below the thresholds for species. The genome sizes of strains F63223T and F60176 were approximate 3.89 and 3.59 Mbp, respectively. The strain F63223T had 3,335 predicted genes with DNA G + C content of 35.6 %. The major respiratory quinone was MK-6 and the major polar lipids were phosphatidylethanolamine and one unidentified lipid. According to the results of the phenotypic, chemotaxonomic characterization, phylogenetic classification and genome analysis, the two isolates could be considered to represent a novel species of the genus Salegentibacter, for which the name Salegentibacter maritimus sp. nov., is proposed, with F63223T (=MCCC 1H00433T = KCTC 82417T) as the type strain.

Tenacibaculum pelagium sp. nov., isolated from marine sediment.

A novel bright yellow pigmented, Gram-stain-negative, gliding, aerobic and rod-shaped marine bacterium, designated strain S7007T, was isolated from a marine sediment sample taken from Jingzi Wharf, Weihai, China. The bacterium was able to grow at 4-33 °C (optimum 28 °C), at pH 6.5-9.0 (optimum 7.0) and with 2.0-4.0% (w/v) NaCl (optimum 3.0%). According to the phylogenetic analysis based on the 16S rRNA gene sequences, strain S7007T was associated with the genus Tenacibaculum and showed highest similarity to Tenacibaculum adriaticum JCM 14633T (98.0%). The average nucleotide identity (ANI) scores of strain S7007T with T. adriaticum JCM 14633T and T. maritimum NBRC 110778T were 78.3% and 77.1%, respectively and the Genome-to-Genome Distance Calculator (dDDH) scores were 20.5% and 19.9%, respectively. The sole isoprenoid quinone was MK-6 and the major cellular fatty acids (> 10.0%) were iso-C15:0, iso-C15:0 3-OH, iso-C15: 1 G and summed feature 3 (comprising C16:1 ω7c and/or C16:1 ω6c). The major polar lipids of strain S7007T were phosphatidylethanolamine, phosphatidyldimethylethanolamine, one unidentified lipid and two unidentified aminolipids. The genomic DNA G + C content was 30.9 mol %. The combined phenotypic data and phylogenetic inference that strain S7007T should be classified as a novel species in the genus Tenacibaculum, for which the name Tenacibaculum pelagium sp. nov. is proposed. The type strain is S7007T (= MCCC 1H00428T = KCTC 72941T).

Long non-coding RNA GACAT3 promotes liver cancer progression by regulating the proliferation, apoptosis and migration of tumor cells.

Long non-coding RNA gastric cancer associated transcript 3 (GACAT3), is a newly identified non-coding RNA, which has been found to be involved in the tumorigenesis of gastric cancer. However, the biological function of GACAT3 in liver cancer remains unclear. The present study aimed to determine the expression level and function of GACAT3 in liver cancer. The authors cultured liver cancer cells in vitro and GACAT3 was silenced in the cells. Cell proliferation, apoptosis and migration were determined by MTT assay, flow cytometric analysis and transwell assay, respectively. It was demonstrated that GACAT3 was upregulated in liver cancer tissues. The inhibition of GACAT3 decreased the ability of hepatoma cells to proliferate and migrate, and increased apoptosis of the cells. These findings provide the first evidence, to the best of our knowledge, of the exact role of GACAT3 in liver cancer, suggesting GACAT3 as a potential target for liver cancer therapy in the future.

Primary hepatic leiomyosarcoma successfully treated by transcatheter arterial chemoembolization: A case report.

BACKGROUND: Primary hepatic leiomyosarcoma is rare and reported sporadically, with less than 40 such cases have been reported in the English-language literature. Although it is reported to be associated with acquired immune deficiency syndrome, Epstein-Barr virus infection, Hodgkin's lymphoma, immunosuppression after organ transplantation, and hepatitis C virus-related liver cirrhosis, the precise steps leading to leiomyosarcoma have not been fully identified. Therapeutic strategies include liver wedge resection or lobectomy, chemotherapy, radiotherapy and liver transplantation; however, the prognosis of primary hepatic leiomyosarcoma is dismal. CASE SUMMARY: We describe here the first case of primary hepatic leiomyosarcoma successfully treated by transcatheter arterial chemoembolization (TACE). The patient was a 68-year-old woman who presented with right upper quadrant pain and weight loss over the past 5 wk before admission. Abdominal computed tomography (commonly known as CT) and ultrasonography showed a mixed echoic mass measuring about 10 cm × 7 cm occupying the right lobe of the liver. Exploratory laparotomy was performed 1 wk after admission. The tumor was unresectable and biopsy was performed. Based on rapid frozen-section and histopathological examination, a final diagnosis of primary hepatic leiomyosarcoma was established. TACE was performed 2 wk later. The postoperative course was uneventful and the patient was discharged on day 7 after the operation. Contrast-enhanced CT showed that the tumor significantly shrunk with satisfactory lipiodol deposition. The patient has been followed up for 82 mo until now, and no progressive enlargement of the tumor or distal metastasis was observed. CONCLUSION: TACE is a safe and effective treatment for primary hepatic leiomyosarcoma. The therapeutic effect of TACE combined with surgical resection should be further assessed.

Paracoccus sediminilitoris sp. nov., isolated from a tidal flat sediment.

A novel marine Gram-stain-negative, non-spore-forming, motile, aerobic, coccoid or ovoid bacterium, designated as strain DSL-16T, was isolated from a tidal flat sediment on the East China Sea and characterized phylogenetically and phenotypically. Optimal growth of the strain occurred at 35 °C (range 4-40 °C), at pH 6 (range 5-11) and with 4 % (w/v) NaCl (range 1-14 %). The nearest phylogenetic neighbour was Paracoccusseriniphilus DSM 14827T (98.2 % 16S rRNA gene sequence similarity). The digital DNA-DNA hybridization value between strain DSL-16T and P. seriniphilus DSM 14827T was 19.5±2.2 %. The average nucleotide identity value between strain DSL-16T and P. seriniphilus DSM 14827T was 83.6 %. The sole respiratory ubiquinone was Q-10. The major polar lipids were phosphatidylmonomethylethanolamine (PME), phosphatidylglycerol (PG), phosphatidylcholine (PC), phosphatidylethanolamine (PE), diphosphatidyglycerol (DPG) and glycolipid (GL). The predominant cellular fatty acids of strain DSL-16T were C18 : 1ω7c, C18 : 0 and 11-methyl C18 : 1ω7c. The G+C content of the genomic DNA was 64.5 mol%. The combined genotypic and phenotypic data indicated that strain DSL-16T represents a novel species of the genus Paracoccus, for which the name Paracoccus sediminilitoris sp. nov. is proposed. The type strain is DSL-16T (=KCTC 62644T=MCCC 1K03534T).

Needleless Transcutaneous Neuromodulation Accelerates Postoperative Recovery Mediated via Autonomic and Immuno-Cytokine Mechanisms in Patients With Cholecystolithiasis.

BACKGROUND: Postsurgical gastrointestinal disturbance is clinically characterized by the delayed passage of flatus and stool, delayed resumption of oral feeding, dyspepsia symptoms, and postsurgical pain. This study was designed 1) to evaluate the effects of needleless transcutaneous neuromodulation (TN) on postoperative recovery; 2) to investigate mechanisms of the TN involving autonomic functions in postoperative patients after removal of the gallbladder. METHODS: Sixty patients scheduled for laparoscopic cholecystectomy (LC) were randomized to TN (n = 30) and sham-TN (n = 30). TN was performed via acupoints ST36 and PC6 for 30 min twice daily from 24 hours before surgery to 72 hours after surgery. Sham-TN was performed using the same parameters at nonacupoints. RESULTS: 1) Compared to sham-TN, TN shortened time to first flatulence (38.9 ± 4.0 vs. 24.9 ± 2.4 hour, p = 0.004) and time to defecation (63.1 ± 4.5 vs. 42.5 ± 3.1 hour, p < 0.001). 2) Compared to sham-TN, TN increased the percentage of normal pace-making activity (66.2 ± 2.2 vs. 73.8 ± 2.3%, p = 0.018). 3) TN enhanced vagal activity. Compared to that 24 hours before surgery, surgery decreased vagal activity (HF) (0.41 ± 0.02 vs. 0.34 ± 0.02, p = 0.043) 3 hours after the operation. Compared to sham-TN, TN increased HF (0.45 ± 0.02 vs. 0.52 ± 0.02, p = 0.045) 72 hours after the operation. Further, HF was negatively correlated with time to defecation and serum norepinephrine. 4) Surgery increased serum IL-6 (1.1 ± 0.1 before surgery vs. 2.9 ± 0.7 pg/mL, p = 0.041) 72 hours after the operation, which was reduced to baseline by TN (0.9 ± 0.1). CONCLUSIONS: In conclusion, the proposed needleless TN accelerates postoperative recovery after LC, possibly mediated via the autonomic and immune-cytokine mechanisms. Needleless and self-administrable TN may be an easy-to-implement and low-cost complementary therapy for postoperative recovery.

Enhancing the functional output of transplanted islets in diabetic mice using a drug-eluting scaffold.

BACKGROUND: Islet transplantation is increasingly used in the diabetic patients to control the blood glucose level. However, the functional output of transplanted islets remains hampered due to the local inflammation, loss of islets, etc. To that end, in this study we explored to enhance the functional output of transplanted islets in diabetic mice by employing a drug-eluting scaffold with a payload of interleukin 4 (IL-4). RESULTS: According to the in vitro studies, the scaffold showed no cytotoxicity, a rapid release of IL-4 within a week and the IL-4 retained its bioactivity. During the 4-week time window after the islet transplantation, in vivo studies showed that the levels of blood insulin and C-peptide 2 in diabetic mice in the drug-eluting scaffold group significantly increased since week 2, which effectively reduced the blood glucose level. In addition, these mice demonstrated a stronger capability to withstand a rapid glucose spike as evidenced by the tolerance of sudden oral glucose challenge test result. A further mechanistic study suggested that the enhanced functional output could be attributed to the M2 polarization of macrophages as evidenced by the increase of CD163+/CD68+ macrophages in the islet tissues. A M2 polarization of macrophages is widely believed to exert an anti-inflammatory influence on local tissues, which could accelerate the resolution of local inflammation following the islet transplantation. CONCLUSION: Our study shed a new light on the hyperglycemia management of diabetic patients following the islet transplantation.

The evaluative value of Sema3C and MFN2 co-expression detected by immunohistochemistry for prognosis in hepatocellular carcinoma patients after hepatectomy.

BACKGROUND: The ability to evaluate the prognosis of hepatocellular carcinoma (HCC) following hepatectomy using biological markers is of great importance. MATERIALS AND METHODS: In this study, we collected samples from 54 patients with HCC after hepatectomy. Immunohistochemistry was used to detect the expression of Sema3C and MFN2 in the HCC samples. RESULTS: Immunohistochemistry results showed that Sema3C and MFN2 co-expression was significantly associated with tumor size. In addition, a significant association between high Sema3C and low MFN2 levels and shorter overall survival was noted, when Sema3C and MFN2 co-expression was analyzed. CONCLUSION: The results suggest that the correlative expression level of Sema3C and MFN2 has a strong value in the prognosis of patients with HCC following hepatectomy.