Roles of the CSE1L-mediated nuclear import pathway in epigenetic silencing.

Epigenetic silencing can be mediated by various mechanisms, and many regulators remain to be identified. Here, we report a genome-wide siRNA screening to identify regulators essential for maintaining gene repression of a CMV promoter silenced by DNA methylation. We identified CSE1L (chromosome segregation 1 like) as an essential factor for the silencing of the reporter gene and many endogenous methylated genes. CSE1L depletion did not cause DNA demethylation. On the other hand, the methylated genes derepressed by CSE1L depletion largely overlapped with methylated genes that were also reactivated by treatment with histone deacetylase inhibitors (HDACi). Gene silencing defects observed upon CSE1L depletion were linked to its nuclear import function for certain protein cargos because depletion of other factors involved in the same nuclear import pathway, including KPNAs and KPNB1 proteins, displayed similar derepression profiles at the genome-wide level. Therefore, CSE1L appears to be critical for the nuclear import of certain key repressive proteins. Indeed, NOVA1, HDAC1, HDAC2, and HDAC8, genes known as silencing factors, became delocalized into cytosol upon CSE1L depletion. This study suggests that the cargo specificity of the protein nuclear import system may impact the selectivity of gene silencing.

Obesity-associated secondary hypogonadism in young and middle-aged men in Guangzhou: A single-centre cross-sectional study.

AIM: Male obesity-associated secondary hypogonadism (MOSH) is becoming a public health issue. We aimed to know MOSH among young and middle-aged men in our hospital, to analyse their sex hormones and other index, and to determine leptin as a risk factor for MOSH. METHODS: In total, 258 men (ages ranging from 20 to 60, mean 38 ± 15) were enrolled in this study, and 242 of these men had their complete data, body mass index (BMI), waist circumference and sex hormones retrospectively investigated. The leptin and lipid levels were also evaluated, and comparisons were made between young (20-39 years old) and middle-aged (40-60 years old) men. RESULTS: Among all the participants, 7 were thin, with a BMI < 18.5 kg/m2 , 95 had a normal BMI (18.5 ≤ BMI < 23.9 kg/m2 ), 87 (35.9%) were overweight (24 ≤ BMI ≤ 27.9 kg/m2 ) and 53 (21.9%) were obese (BMI ≥ 28 kg/m2 ), 173 (71.5%) had a waist sized ≥ 85 cm. Among the 242 men, 104 (43%) had hypogonadism (TT ≤ 331.412 ng/dL). Compared with the men of normal weight, the level of testosterone of the obese men decreased (P = .006), while the level of serum lipids (including total cholesterol, TG and low-density lipoprotein cholesterol, P < .05) was elevated, higher UA, FSH and leptin were also present in the obese men. There were 83 (34.2%) men with MOSH. Compared with middle-aged men with MOSH, the FSH in young men was significantly reduced (P < .05); no significant increase in estradiol was observed in the MOSH group. The leptin levels in the MOSH group were significantly higher than those in the hypogonadism only group (P < .001). CONCLUSION: Obesity increases the prevalence of hypogonadism. The decrease in testosterone levels in young men maybe due to inhibition of the hypothalamic pituitary gonadal axis. Leptin is an independent risk factor for MOSH.

Multi-genic pattern found in rare type of hypopituitarism: a whole-exome sequencing study of Han Chinese with pituitary stalk interruption syndrome.

Pituitary stalk interruption syndrome (PSIS) is a rare type of hypopituitarism manifesting various degrees of pituitary hormone deficiency. Although mutations have been identified in some familial cases, the underpinning mechanisms of sporadic patients with PSIS who are in a vast majority remain elusive, necessitating a comprehensive study using systemic approaches. We postulate that other genetic mechanisms may be responsible for the sporadic PSIS. To test this hypothesis, we conducted a study in 24 patients with PSIS of Han Chinese with no family history using whole-exome sequencing (WES) and bioinformatic analysis. We identified a group of heterozygous mutations in 92% (22 of 24) of the patients, and these genes are mostly associated with Notch, Shh, Wnt signalling pathways. Importantly, 83% (20 of 24) of the patients had more than one mutation in those pathways suggesting synergy of compound mutations underpin the pathogenesis of sporadic PSIS.

Correlation between Pituitary Stalk Interruption Syndrome and Prokineticin Receptor 2 and Prokineticin 2 Mutations.

OBJECTIVE: To analyze the correlation between pituitary stalk interruption syndrome (PSIS) and prokineticin receptor 2 (PROKR2) and prokineticin 2 (RROK2) mutations. METHODS: PROKR2 and RROK2 genotypes were identified by multiplex polymerase chain reaction analysis with exon-flanking primers and by automated sequencing techniques with peripheral blood DNA samples from 59 patients with PSIS. RESULTS: Of these 59 PSIS patients, 6 showed intragenic deletions at the PROKR2 locus. Of them, 5 patients exhibited intragenic subsititution of exon 2 (c.991G>A), and the remaining one patient exhibited intragenic subsititution of exon 2 (c.1057C>T). No PROK2 mutation was found in these PSIS patients. CONCLUSION: PROKR2 may be the susceptibility gene of PSIS.

Clinical Features of Pituitary Stalk Interruption Syndrome in 114 Cases.

Objective To analyze the clinical characteristics of pituitary stalk interruption syndrome(PSIS). Methods The clinical data including clinical manifestations,laboratory tests,and imaging findings of 114 PSIS patients in our hospital were retrospectively analyzed. Results Of these 114 PSIS patients,102 cases (89.4%) were male. The average age was 21.1?6.1 years. A history of breech delivery was documented in 91 cases (91.9%). Short stature was found in 89 cases (71.8%) and bone age delayed (6.1?5.1) years. Secondary sex characteristics were poor or undeveloped in most patients. The prevalence of deficiencies in growth hormone,gonadotropins,corticotropin,and thyrotropin were 100.0%,94.0%,84.2%,and 74.6%,respectively. Hyperprolactinemia was found in 28.1% of patients. Three or more pituitary hormone abnormalities were found in 105 cases(92.1%). Compared with the 5 cases with history of cephalic delivery,no difference were found in the aspects of height(t=0.297,P=0.634),penile length(t=1.205,P=0.882),testicular volume (U=99.000,P=0.348),growth hormone peak (U=89.000,P=0.186),adrenocorticotropic hormone peak(U=131.000,P=0.967),luteinizing hormone peak(U=98.500,P=0.582),thyroid-stimulating hormone (U=82.000,P=0.162),and the height of anterior pituitary (t=1.676,P=0.107) in the 53 cases with history of breech delivery. Conclusions The clinical manifestations,symptoms,hormone deficiencies were severe in our series. The condition severities were not remarkably different in patients with different delivery ways.

Triiodothyronine regulates distribution of thyroid hormone receptors by activating AMP-activated protein kinase in 3T3-L1 adipocytes and induces uncoupling protein-1 expression.

The purposes of this study were to examine whether thermogenesis in 3T3-L1 adipocytes is related to variations in thyroid hormone receptors (TRs) that are differently regulated by triiodothyronine (T3), and the possible role of AMP-activated protein (AMPK) in thermogenesis after cell differentiation. Differentiated 3T3-L1 adipocytes were maintained under four conditions: normal control group, T3 treatment group, AMPK agonist (5-aminoimidazole-4-carboxamide-1-ß-D-ribofuranoside) treatment group, and T3 and AMPK inhibitor (Compound C) treatment group. Real-time polymerase chain reaction was then performed to evaluate the changes in TRα and TRß mRNA levels in the cells, as well as marker genes for brown adipose tissue including uncoupling protein (UCP)-1 and Cidea. Western blotting was carried out for the cells to detect the expressions of TRα, TRß, and AMPK protein levels. After T3 treatment, the mRNA and protein levels of TRα decreased compared with the control group, while TRß mRNA and protein levels increased markedly at the same time. We also found elevated mRNA levels of UCP-1 and Cidea after exposure to T3. However, the distribution of TRs was reversed by Compound C. AMPK protein levels were clearly activated by T3. Our results suggest that the distribution of TRs is related to thermogenesis, and AMPK may participate in the alterations.

[High-fat diet induces pulmonary fibrosis in rats and inhibitory effects of N-acetylcysteine].

OBJECTIVE: To explore the relation between high-fat diet and pulmonary fibrosis and the inhibition of N-acetylcysteine (NAC) on lung tissue in rats. METHODS: Thirty Sprague Dawley (SD) male rats were randomly divided into control group (n = 10) on a quantitative control Lieber-DeCarli liquid diet, a high-fat diet group (n = 10) on a high fat-diet Lieber-DeCarli liquid diet and NAC group (n = 10) on NAC 300 mg×kg(-1)×d(-1). All rats were sacrificed 8 weeks later. The morphological changes and collagen deposition in lung tissue were observed by hematoxylin & eosin and Masson staining while the contents of glutathione (GSH) and hyaluronic acid (HA) measured through colorimetry and enzyme-linked immunosorbent assay. And the expression of transforming growth factor-ß1 (TGF-ß1) expression in lung tissue was detected through immunohistochemistry. RESULTS: There were variable degree of alveolar and alveolar septal infiltration of inflammatory cells. And more deposition of collagen fibers appeared at intervals of alveolar in high fat group. Similar pathological changes were found in NAC group, but the degree was lower than that of high-fat group. Compared to the control and NAC groups, the lung tissue content of GSH decreased (GSH: 0.11 ± 0.05 vs 0.19 ± 0.11, 0.22 ± 0.14 mg/g, both P < 0.05) while HA and TGF-ß1 increased in high-fat diet group (HA: 0.57 ± 0.06 vs 0.46 ± 0.04, 0.41 ± 0.04 mg/g; TGF-ß1: 24.6 ± 3.4 vs 16.8 ± 2.6, 11.7 ± 1.5, all P < 0.05). CONCLUSION: High-fat diet may induce pulmonary fibrosis in rats and NAC has inhibitory effects.

Integrated multiomic analysis and high-throughput screening reveal potential gene targets and synergetic drug combinations for osteosarcoma therapy.

Although great advances have been made over the past decades, therapeutics for osteosarcoma are quite limited. We performed long-read RNA sequencing and tandem mass tag (TMT)-based quantitative proteome on osteosarcoma and the adjacent normal tissues, next-generation sequencing (NGS) on paired osteosarcoma samples before and after neoadjuvant chemotherapy (NACT), and high-throughput drug combination screen on osteosarcoma cell lines. Single-cell RNA sequencing data were analyzed to reveal the heterogeneity of potential therapeutic target genes. Additionally, we clarified the synergistic mechanisms of doxorubicin (DOX) and HDACs inhibitors for osteosarcoma treatment. Consequently, we identified 2535 osteosarcoma-specific genes and several alternative splicing (AS) events with osteosarcoma specificity and/or patient heterogeneity. Hundreds of potential therapeutic targets were identified among them, which showed the core regulatory roles in osteosarcoma. We also identified 215 inhibitory drugs and 236 synergistic drug combinations for osteosarcoma treatment. More interestingly, the multiomic analysis pointed out the pivotal role of HDAC1 and TOP2A in osteosarcoma. HDAC inhibitors synergized with DOX to suppress osteosarcoma both in vitro and in vivo. Mechanistically, HDAC inhibitors synergized with DOX by downregulating SP1 to transcriptionally modulate TOP2A expression. This study provided a comprehensive view of molecular features, therapeutic targets, and synergistic drug combinations for osteosarcoma.

Identification of GnRH-like peptide and its potential signaling pathway involved in the oocyte meiotic maturation in the Chinese mitten crab, Eriocheir sinensis.

Gonadotropin-releasing hormone (GnRH) plays a pivotal role in reproductive regulation in vertebrates. However, GnRH was rarely isolated and its function remains poorly characterized in invertebrates. The existence of GnRH in ecdysozoa has been controversial for a long. Here, we isolated and identified two GnRH-like peptides from brain tissues in Eriocheir sinensis. Immunolocalization showed that the presence of EsGnRH-like peptide in brain, ovary and hepatopancreas. Synthetic EsGnRH-like peptides can induce germinal vesicle breakdown (GVBD) of oocyte. Similar to vertebrates, ovarian transcriptomic analysis revealed a GnRH signaling pathway in the crab, in which most genes exhibited dramatically high expression at GVBD. RNAi knockdown of EsGnRHR suppressed the expression of most genes in the pathway. Co-transfection of the expression plasmid for EsGnRHR with reporter plasmid bearing CRE-luc or SRE-luc response element into 293T cells showed that EsGnRHR transduces its signal via cAMP and Ca2+ signaling transduction pathways. In vitro incubation of the crab oocyte with EsGnRH-like peptide confirmed the cAMP-PKA cascade and Ca2+ mobilization signaling cascade but lack of a PKC cascade. Our data present the first direct evidence of the existence of GnRH-like peptides in the crab and demonstrated its conserved role in the oocyte meiotic maturation as a primitive neurohormone.

Inhibition of Long non-coding RNA zinc finger antisense 1 improves functional recovery and angiogenesis after focal cerebral ischemia via microRNA-144-5p/fibroblast growth factor 7 axis.

Long non-coding RNA zinc finger antisense 1 (ZFAS1) has been probed in cerebral ischemia, while the regulatory mechanism of ZFAS1 in focal cerebral ischemia (FCI) via binding to microRNA (miR)-144-5p remains rarely explored. This study aims to decipher the function of ZFAS1 on FCI via sponging miR-144-5p to modulate fibroblast growth factor 7 (FGF7). The focal cerebral ischemia rat model was established by occlusion of the middle cerebral artery (MCAO) Lentivirus vectors altering ZFAS1, miR-144-5p or FGF7 expression were injected into rats before MCAO. Then, ZFAS1, miR-144-5p, and FGF7 levels were detected, the inflammatory factor level, oxidative stress level, angiogenesis, neurological function injury and neuronal apoptosis were assessed. The binding relations among ZFAS1, miR-144-5p and FGF7 were validated. ZFAS1 and FGF7 expression was elevated, while miR-144-5p expression was reduced in FCI rats. Decreased ZFAS1 or FGF7 or enriched miR-144-5p repressed the inflammatory response, oxidative stress, neuronal apoptosis, while it improved angiogenesis, and neurological function recovery; while up-regulated ZFAS1 exerted opposite effects. The augmented miR-144-5p or silenced FGF7 reversed the effects of enriched ZFAS1. ZFAS1 sponged miR-144-5p that targeted FGF7. Inhibition of lncRNA ZFAS1 improves functional recovery and angiogenesis after FCI via miR-144-5p/FGF7 axis. This study provides novel therapeutic targets for FCI treatment.

High-Altitude Exposure and Time Interval Perception of Chinese Migrants in Tibet.

High-altitude exposure can negatively impact one's ability to accurately perceive time. This study focuses on Chinese migrants who have traveled to the Tibetan plateau and explores the effects of high-altitude exposure on their time interval judgment abilities based on three separate studies. In Study 1, it was found that exposure to high altitudes negatively impacted the time interval judgment functions of the migrants compared with a low-altitude control group; they exhibited a prolonged response time (540 ms: p = 0.006, 95% CI (−1.70 −0.32)) and reduced accuracy (1080 ms: p = 0.032, 95% CI (0.06 1.26)) in certain behavioral tasks. In Study 2, the results showed that high-altitude exposure and sleepiness had an interactive effect on time interval judgment (1080 ms) (p < 0.05, 95% CI (−0.83 −0.40)). To further verify our interaction hypothesis, in Study 3, we investigated the time interval judgment of interactions between acute high-altitude exposure and sleepiness level. The results revealed that the adaptation effect disappeared and sleepiness significantly exacerbated the negative effects of high-altitude exposure on time interval judgment (p < 0.001, 95% CI (−0.85 −0.34)). This study is the first to examine the effects of high-altitude exposure on time interval judgment processing functions and the effects of sleep-related factors on individual time interval judgment.

[The application of improved Glasgow coma scale score of 15 as switching point for invasive noninvasive mechanical ventilation in treatment of severe respiratory failure in chronic obstructive pulmonary disease].

OBJECTIVE: To estimate the feasibility and the efficacy of early extubation and the sequential non invasive mechanical ventilation (MV) in severe respiratory failure of chronic obstructive pulmonary disease (COPD) with the improved Glasgow coma scale (GCS) score of 15 as the switching point. METHODS: By a prospective control study, 20 patients with COPD and respiratory failure who had undergone endotracheal intubation and MV from March 2007 to November 2009 were enrolled as treatment group. Invasive MV with synchronous intermittent mandatory ventilation and pressure support ventilation (SIMV+PSV) pattern were given to these patients. When the period of "improved GCS score of 15 standard" window period appeared and being kept for 2 hours, endotracheal tube was extubated, and nasal mask with PSV+positive end expiratory pressure (PEEP) was used, followed by gradual decrease of the level of pressure support till weaning of MV. Nineteen patients who were treated with MV with ordinary way of weaning from March 2005 to March 2007 served as the control group. Prior to the MV, the ventilation and oxygenation index , the length of invasive MV, total MV time, total hospital stay, re intubation and ventilator associated pneumonia (VAP) occurred in the number of cases were observed and compared between two groups. RESULTS: There was no significant difference in the ventilation and oxygenation index prior to the MV. Compared with control group, in treatment group, the length of invasive ventilation (days: 3.2±1.1 vs. 10.5±3.2), the total duration of MV (days: 4.8±2.5 vs. 10.5±3.2), the length of hospital stay (days: 17±3 vs. 22±7) were significantly shorter (all P<0.01), and the incidence of VAP was significantly lower (cases: 0 vs. 5, P<0.01), while the number of re intubation was slightly higher but without statistical significance (cases: 3 vs. 1, P>0.05). CONCLUSION: The application of improved GCS score of 15 as the switching point with 2 hours as window period for early extubation and non invasive nasal mask ventilation can significantly improve the therapeutic effect in patients with severe respiratory failure in COPD.

Production of enterodiol from defatted flaxseeds through biotransformation by human intestinal bacteria.

BACKGROUND: The effects of enterolignans, e.g., enterodiol (END) and particularly its oxidation product, enterolactone (ENL), on prevention of hormone-dependent diseases, such as osteoporosis, cardiovascular diseases, hyperlipemia, breast cancer, colon cancer, prostate cancer and menopausal syndrome, have attracted much attention. To date, the main way to obtain END and ENL is chemical synthesis, which is expensive and inevitably leads to environmental pollution. To explore a more economic and eco-friendly production method, we explored biotransformation of enterolignans from precursors contained in defatted flaxseeds by human intestinal bacteria. RESULTS: We cultured fecal specimens from healthy young adults in media containing defatted flaxseeds and detected END from the culture supernatant. Following selection through successive subcultures of the fecal microbiota with defatted flaxseeds as the only carbon source, we obtained a bacterial consortium, designated as END-49, which contained the smallest number of bacterial types still capable of metabolizing defatted flaxseeds to produce END. Based on analysis with pulsed field gel electrophoresis, END-49 was found to consist of five genomically distinct bacterial lineages, designated Group I-V, with Group I strains dominating the culture. None of the individual Group I-V strains produced END, demonstrating that the biotransformation of substrates in defatted flaxseeds into END is a joint work by different members of the END-49 bacterial consortium. Interestingly, Group I strains produced secoisolariciresinol, an important intermediate of END production; 16S rRNA analysis of one Group I strain established its close relatedness with Klebsiella. Genomic analysis is under way to identify all members in END-49 involved in the biotransformation and the actual pathway leading to END-production. CONCLUSION: Biotransformation is a very economic, efficient and environmentally friendly way of mass-producing enterodiol from defatted flaxseeds.

NBPF9 Gene May Be Involved in Congenital Hypopituitarism: A Whole-Genome Study of a Boy with Pituitary Stalk Interruption Syndrome and His Family.

Pituitary stalk interruption syndrome (PSIS) is a rare congenital defect manifesting as various degrees of anterior pituitary hormone deficiency. Scattered familial cases have been found, revealing some genetic variants. However, most of the previous research studies involved an affected sibling, and the gene spectra of the patients' entire family have rarely been reported. We conducted a study of a family consisting of a PSIS patient with his unaffected sibling and healthy parents of Han Chinese background using whole-genome sequencing. Bioinformatic analysis was carried out, and mutations related to PSIS, single-nucleotide variants (SNVs), insertion-deletion (InDELs), and structural variations (SVs) in all the four samples were filtered. After Sanger sequencing, we confirmed the variants obtained and selected three candidate genes for functional verification. The gene variations in this boy with PSIS and his lineal relatives are reported herein; de novo sequencing revealed that the NBPF9 gene may be involved in the pathogenesis of PSIS.

[Project about how to deal with the interrupted test of environmental test for medical electrical equipment].

The environmental test for medical electrical equipment may be interrupted by power cut or the equipment broken and so on. For the purpose of standard and valid testing, this paper puts forward a project about how to deal with the interrupted disposal of environmental test for medical electrical equipment. The project aims at the environmental requirements and test methods for GB/T 14710--93.

Normal height and novel mutations in growth hormone deficiency adults with pituitary stalk interruption syndrome.

OBJECTIVE: Pituitary stalk interruption syndrome (PSIS) is a rare congenital disease which results in hypopituitarism. Patients with PSIS often exhibit short stature due to their deficiency of growth hormone (GH). CASE PRESENTATION: Here, we present two rare cases of adults males with PSIS, in which the patients were of normal height and did not take any GH supplements. Sterility and multiple hormone deficiencies including GH were seen in both of them. Through whole exome sequencing of their DNA, we found novel mutations they shared, three in MUC4 (c.7815G>T, c.3548C>T, c.3399C>G) and one in NBPF10 (c.536C>A). CONCLUSION: The present cases suggest that there are exceptions in GH deficient patients where a select few can attain normal heights without GH therapy. Genetic screening can be a predictor for prognoses of rare types of hypopituitarism.

[A randomized controlled trial study of pulmonary rehabilitation with respiratory physiology as the guide on prognosis in patients with chronic obstructive pulmonary disease].

OBJECTIVE: To observe the effect of pulmonary rehabilitation with respiratory physiology as guide in patients with chronic obstructive pulmonary disease (COPD). METHODS: Sixty patients of severe and very severe COPD as categorized by global proposed diagnostic criteria for COPD (GOLD, 2006) were enrolled for study. They were randomly divided into three groups, and with 20 patients in each group. The patients in group A were given pulmonary rehabilitation guided by respiratory physiology thrice a day, 15 minutes each time for 8 weeks. The patients in group B were given pulmonary rehabilitation with pursed lip respiration thrice a day, 15 minutes per time for 8 weeks. The patients in group C were given no pulmonary rehabilitation. Six minute-walk-distance (6MWD), medical research council (MRC) dyspnea scale, activities of daily living (ADL), maximal expiratory pressure (MEP), maximal inspiratory pressure (MIP), and quality of life (QOL) were determined before and after respective pulmonary rehabilitation course. RESULTS: (1) There were 3, 5, 5 patients in group A, group B, group C dropped off in the course of rehabilitation respectively. (2) The patients' MRC grade after pulmonary rehabilitation in group A and group B decreased compared with that before pulmonary rehabilitation (both P<0.01), but the difference was not significant between two groups (P>0.05). (3) 6MWD, ADL, MEP, MIP of patients in group A and group B increased after pulmonary rehabilitation compared with that before pulmonary rehabilitation, and 6MWD, ADL, MEP, MIP of patients in group A were increased after pulmonary rehabilitation more than those in group B (P<0.05 or P<0.01). (4)The patients' body status, shortness of breath, social activity, home chores in group A and group B, and uneasiness in group A after pulmonary rehabilitation were improved more than those before pulmonary rehabilitation (P<0.05 or P<0.01), but the difference in state of mind, headache, appetite was not markedly different before and after pulmonary rehabilitation in two groups (all P>0.05). The difference in QOL was not marked between group A and group B after pulmonary rehabilitation (all P>0.05). CONCLUSION: (1) The pulmonary rehabilitation with pursed lip respiration and the pulmonary rehabilitation with the guide of respiratory physiology ameliorates dyspnea, improves ADL, QOL, exercise tolerance, function of respiratory muscle in the severe and very severe COPD patients remarkably. (2) The effect of the pulmonary rehabilitation with the guide of respiratory physiology is better than that of the pulmonary rehabilitation with pursed lip respiration, and it can be considered as a more effective pulmonary rehabilitation method for the patients with severe and very severe COPD.

Strains, Mechanism, and Perspective: Salmonella-Based Cancer Therapy.

Recently, investigation of bacterial-based tumor therapy has regained focus due to progress in molecular, cellular, and microbial biology. Many bacteria such as Salmonella, Listeria, Escherichia, and Clostridium have proved to have tumor targeting and in some cases even tumor-destroying phenotypes. Furthermore, bacterial clinical treatments for cancer have been improved by combination with other therapeutic methods such as chemotherapeutic drugs and radioactive agents. Synthetic biology techniques have also driven the development of new bacterial-based cancer therapies. However, basic questions about the mechanisms of bacterial-mediated tumor targeting and destruction are still being elucidated. In this review, we focus on three tumor-therapeutic Salmonella models, the most intensively studied bacterial genus in this field. One of these Salmonella models is our Salmonella enterica serovar Typhimurium LT2 derived strain CRC2631, engineered to minimize toxicity but maximize tumor-targeting and destruction effects. The other two are VNP20009 and A1-R. We compare the means by which these therapeutic candidate strain models were selected for study, their tumor targeting and tumor destruction phenotypes in vitro and in vivo, and what is currently known about the mechanisms by which they target and destroy tumors.

Matrix metalloproteinase-9 and -2 and tissue inhibitor of matrix metalloproteinase-2 in invasive pituitary adenomas: A systematic review and meta-analysis of case-control trials.

The extracellular matrix is important for tumor invasion and metastasis. Normal function of the extracellular matrix depends on the balance between matrix metalloproteinases (MMPs) and tissue inhibitors of metalloproteinases (TIMPs). The objective of this meta-analysis was to assess the relationship between expression of MMP-9, MMP-2, and TIMP-2 and invasion of pituitary adenomas.We searched Pubmed, Embase, and the Chinese Biomedical Database up to October 2015. RevMan 5.1 software (Cochrane Collaboration, Copenhagen, Denmark) was used for statistical analysis. We calculated the standardized mean difference (SMD) for data expressed as mean ±â€Šstandard deviation because of the difference in the detection method.Twenty-four studies (1320 patients) were included. MMP-9 expression was higher in the patients with invasive pituitary adenomas (IPAs) than patients with noninvasive pituitary adenomas (NIPAs) with detection methods of IHC [odds ratio (OR) = 5.48, 95% confidence interval (CI) = 2.61-11.50, P < 0.00001), and reverse transcriptase-polymerase chain reaction (SMD = 2.28, 95% CI = 0.91-3.64, P = 0.001). MMP-2 expression was also increased in patients with IPAs at the protein level (OR = 3.58, 95% CI = 1.63-7.87, P = 0.001), and RNA level (SMD = 3.91, 95% CI = 1.52-6.29, P = 0.001). Meta-analysis showed that there was no difference in TIMP-2 expression between invasive and NIPAs at the protein level (OR = 0.38, 95% CI = 0.06-2.26, P = 0.29). MMP-9 expression in prolactinomas and nonfunctioning pituitary adenomas was also no difference (OR = 1.03, 95% CI = 0.48-2.20, P = 0.95).The results indicated that MMP-9 and -2 may be correlated with invasiveness of pituitary adenomas, although their relationship with functional status of pituitary adenomas is still not clear. TIMP-2 expression in IPAs needs to be investigated further.

[Purification efficiency of four different ecotypes of wetland plants on eutrophic water body]. / 4ç§ä¸åŒç”Ÿæ´»åž‹æ¹¿åœ°æ¤ç‰©å¯¹å¯Œè¥å »åŒ–æ°´ä½“çš„å‡€åŒ–æ•ˆæžœ.

Four wetland plant species (Acorus calamus, Typha orientalis, Lemna minor, Ceratophyllum demersum) were grown to compare the purification efficiency of wetland plant species alone and in combination on two eutrophic water bodies, high concentration sewage (influent) and low concentration sewage (effluent) in a wastewater treatment plant. The results showed that the concentration of total nitrogen (TN), total phosphorus (TP) and chemical oxygen demand (COD) decreased sharply at the beginning of the test, but this decreasing trend slowed down in the late phase. The wetland plants could remove TN, TP and COD from wastewater effectively, but the degree of purification was different among different wetland plant species and among different combinations of these species. The wetland plant species were more effective in reducing TN when used in combination than used alone, and the combination of T. orientalis, L. minor and C. demersum had the highest efficiency in removing TN. The emerged plant species alone were more effective in removing TP in the high concentration sewage, but wetland plant combinations had a higher removal efficiency of TP in the low concentration sewage. In the high concentration sewage, the COD removal efficiency of wetland plants was 85.1%-96.0%, and A. calamus and T. orientalis had the highest removal efficiency. In the low concentration sewage, the COD removal efficiency of wetland plants was 76.9%-94.8%, and the highest removal efficiency was observed in the combination of A. calamus, L. minor and C. demersum. On the whole, the efficiency of wetland plants in removing TN, TP and COD was significantly greater in the high concentration sewage than in the low concentration sewage, and pH was improved in both treatments.