Intervention effects and related mechanisms of glycyrrhizic acid on zebrafish with Hirschsprung-associated enterocolitis.

BACKGROUND: The prevention and treatment of Hirschsprung-associated enterocolitis (HAEC) is a serious challenge in pediatric surgery. Exploring the mechanism of HAEC is conducive to the prevention of this disease. AIM: To explore the possible mechanism of glycyrrhizic acid (GA) and its therapeutic effect on HAEC. METHODS: We developed a model of enteritis induced by trinitrobenzenesulfonic acid (TNBS) in zebrafish, and treated it with different concentrations of GA. We analyzed the effect of GA on the phenotype and inflammation of zebrafish. RESULTS: After treatment with TNBS, the area of the intestinal lumen in zebrafish was significantly increased, but the number of goblet cells in the intestinal lumen was significantly reduced, but these did not increase the mortality of zebrafish, indicating that the zebrafish enteritis model was successfully developed. Different concentrations of GA protected zebrafish with enteritis. In particular, high concentrations of GA were important for the prevention and control of HAEC because it significantly reduced the intestinal luminal area, increased the number of goblet cells in the intestinal lumen, and reduced the levels of interleukin (IL)-1ß and IL-8. CONCLUSION: GA significantly reduced the intestinal luminal area, increased the number of intestinal goblet cells, and decreased IL-1ß and IL-8 in zebrafish, and is important for prevention and control of HAEC.

SRY-negative 45,X/46,XY adult male with complete masculinization and infertility: A case report and review of literature.

BACKGROUND: 45,X/46,XY mosaicism is a rare chromosomal abnormality with a wide range of phenotypes in both males and females, from normal individuals with different degrees of genital ambiguity to those who show signs of Turner's syndrome. More rarely, cases of 45,X/46,XY mosaicism with a normal-appearing male phenotype are not found until a chromosome test is performed to investigate the cause of male infertility. CASE SUMMARY: In this study, a 29-year-old male patient with complete azoospermia is reported. Chromosomal analyses of his lymphocytes revealed the karyotype 45,X[93%]/46,X,+mar(Y)[7%]. In addition, Y chromosome-specific markers, such as SRY, ZFY, AZFa, AZFb and AZFc, were not observed in his blood DNA according to multiplex polymerase chain reaction test. A literature review identified several 45,X/46,XY cases with a normal-appearing male phenotype, most of whom were diagnosed during infertility investigation. However, the present case is the first SRY-negative 45,X/46,XY male case diagnosed during a premarital medical examination. CONCLUSION: This finding further suggests that sex determination is a complex process regulated by multiple genetic and environmental factors.

[Shared functional modules for nasopharyngeal and oral squamous cell carcinoma identified by network analysis of transcriptomes].

Although nasopharyngeal carcinoma (NPC) and oral squamous cell carcinoma (OSCC) are highly correlated clinical diseases, the underling molecular mechanisms to link the two diseases remain largely unknown. The aim of this study is to identify the shared functional modules for NPC and OSCC by using large-scale transcriptomic data. Gene expression profile datasets of NPC and OSCC were obtained from the GEO database. A total of 1279 differentially expressed genes (DEGs) of NPC and 1293 DEGs of OSCC were identified by fold change and empirical Bayes method, and 278 DEGs were common to these two diseases. These overlapped genes were translated into a primary network consisting of 1290 nodes (genes) and 1766 edges. The primary network was then decomposed into 15 compacted modules (subnets) with high modularity by Newman's algorithm. Topological analysis of these modules identified a total of 58 hub genes, most of which (e.g., PCNA, CDK1, STAT1, CCL5, and MMP1) have been proved to be associated with NPC and/or OSCC, while the rest (e.g., MELK, NME1, RACGAP1, INHBA, and NID1) might be novel risk genes for the two diseases. Further bioinformatics analysis of KEGG databases revealed that these modules are involved in multiple pathogenic biological pathways for either NPC or OSCC (e.g., p53 signaling pathway, ECM-receptor interaction, focal adhesion, and cell cycle). This study demonstrates that NPC and OSCC have similar molecular bases, and the identified pleiotropic modules may shape the complicated molecular interplays underlying the two clinically correlated diseases.

Detection and Identification of Serum Peptides Biomarker in Papillary Thyroid Cancer.

BACKGROUND Papillary thyroid cancer (PTC) is currently the most commonly diagnosed endocrine malignancy. In addition, the sex- and age-adjusted incidence of PTC has exhibited a greater increase over the last 2 decades than in many other malignancies. Thus, discovering noninvasive specific serum biomarker to distinguish PTC from cancer-free controls in its early stages remains an important goal. MATERIAL AND METHODS Serum samples from 88 PTC patients and 80 cancer-free controls were randomly allocated into training or validation sets. Serum peptide profiling was performed by matrix-assisted laser desorption/ionization-time of flight mass spectrometry (MALDI-TOF-MS) after using weak cation exchange magnetic beads (WCX-MB), and the results were evaluated by use of ClinProTools™ Software. To distinguish PTC from cancer-free controls, quick classifier (QC), supervised neural network (SNN), and genetic algorithm (GA) models were established. The models were blindly validated to verify their diagnostic capabilities. The most discriminative peaks were subsequently identified with a nano-liquid chromatography-electrospray ionization-tandem mass spectrometry system. RESULTS Six peptide ions were identified as the most discriminative peaks between the PTC and cancer-free control samples. The QC model exhibited satisfactory sensitivity and specificity among the 3 models that were validated. Two peaks, at m/z 2671.17 and m/z 1464.68, were identified as fragments of the alpha chain of fibrinogen, while a peak at m/z 1738.92 was a fragment of complement component 4A/B. CONCLUSIONS MS combined with ClinProTools™ software was able to detect peptide biomarkers in PTC patients. In addition, the constructed classification models provided a serum peptidome pattern for distinguishing PTC from cancer-free controls. Both fibrinogen a and complement C4A/B were identified as potential markers for diagnosis of PTC.

Direct Detection of Vibrio vulnificus, Vibrio parahaemolyticus, and Vibrio alginolyticus from Clinical and Environmental Samples by a Multiplex Touchdown Polymerase Chain Reaction Assay.

BACKGROUND: Vibrio vulnificus, V. alginolyticus, and V. parahaemolyticus are commonly and opportunistically pathogenic to humans. METHODS: In this study, a novel multiple touchdown polymerase chain reaction method (MT-PCR) was developed to benefit rapid and simultaneous detection of the presence of the three Vibrio species from the enriched clinical and environmental samples. RESULTS: The method showed a sensitivity of 104 colony forming units (CFU)/mL for V. vulnificus, 103 CFU/mL for V. parahaemolyticus and V. alginolyticus, and a specificity of 100% for all the three Vibrio species. All strains of the three Vibrio species were detected in the spiked samples artificially contaminated with reference strains and were identified directly from the enriched clinical and environmental samples within three hours by this MT-PCR assay. All the corresponding bacteria were isolated from these enriched samples in 48 hours by standard microbiologic procedures. CONCLUSIONS: This MT-PCR method, which can detect V. vulnificus, V. parahaemolyticus, and V. alginolyticus directly and simultaneously, was rapid, sensitive, specific, and can be used in clinical diagnostics, food industry studies, and risk assessment of environment.

Establishment of insect cell lines expressing green fluorescent protein on cell surface based on AcMNPV GP64 membrane fusion characteristic.

Displaying a protein on the surface of cells has been provided a very successful strategy to function research of exogenous proteins. Based on the membrane fusion characteristic of Autographa californica multiple nucleopolyhedrovirus envelope protein GP64, we amplified and cloned N-terminal signal peptide and C-terminal transmembrane domain as well as cytoplasmic tail domain of gp64 gene into vector pIZ/V5-His with multi-cloning sites to construct the cell surface expression vector pIZ/V5-gp64. To verify that the vector can be used to express proteins on the membrane of insect cells, a recombinant plasmid pIZ/V5-gp64-GFP was constructed by introducing the PCR amplified green fluorescent protein (GFP) gene and transfected into insect cell lines Sf9 and H5. The transected cells were screened with zeocin and cell cloning. PCR verification results showed that the GFP gene was successfully integrated into these cells. Green fluorescence in Sf9-GFP and H5-GFP cells was observed by using confocal laser scanning microscopy and immunofluorescence detection indicated that GFP protein was located on the cell membrane. Western blot results showed that a fusion protein GP64-GFP of about 40 kDa was expressed on the membrane of Sf9-GFP and H5-GFP cells. The expression system constructed in this paper can be used for localization and continuous expression of exogenous proteins on insect cell membrane.

Identification of Novel Inflammatory Cytokines and Contribution of Keratinocyte-Derived Chemokine to Inflammation in Response to Vibrio vulnificus Infection in Mice.

Currently, only tumor necrosis factor alpha (TNF-α) and interleukin family cytokines have been found to be elicited in Vibrio vulnificus (V. vulnificus)-infected animal models and humans. However, multiple other cytokines are also involved in the immune and inflammatory responses to foreign microorganism infection. Antibody array technology, unlike traditional enzyme-linked immunosorbent assay (ELISA), is able to detect multiple cytokines at one time. Therefore, in this study, we examined the proinflammatory cytokine profile in the serum and liver homogenate samples of bacterial-infected mice using antibody array technology. We identified nine novel cytokines in response to V. vulnificus infection in mice. We found that keratinocyte-derived chemokine (KC) was the most elevated cytokine and demonstrated that KC played a very important role in the V. vulnificus infection-elicited inflammatory response in mice, as evidenced by the fact that the blocking of KC by anti-KC antibody reduced hepatic injury in vivo and that KC induced by V. vulnificus infection in AML-12 cells chemoattracted neutrophils. Our findings implicate that KC may serve as a novel diagnostic biomarker and a possible therapeutic target for V. vulnificus infection.

Complete Genome Sequence of Vibrio alginolyticus ATCC 17749T.

Vibrio alginolyticus is a Gram-negative halophilic bacterium and has been recognized as an opportunistic pathogen in both humans and marine animals. It is the causative agent of food-borne diseases, such as gastroenteritis, and it invades through wounds in predisposed individuals. In this study, we present the completed genome of V. alginolyticus ATCC 17749(T) through high-throughput sequencing.

[Characteristics of complex chromosomal rearrangement in Chinese male carriers and its impact on male fertility].

OBJECTIVE: To analyze the characteristics of complex chromosomal rearrangement (CCR) in Chinese male carriers and its influence on male fertility. METHODS: Using the G band technique, we conducted karyotype analysis on the peripheral blood lymphocytes of 1,625 Chinese males with reproductive problems. We also searched CNKI and Wanfang database for CCR-related literature published between January 1984 and November 2013, followed by statistical analysis on the CCR characteristics and reproduction-related data of the CCR carriers. RESULTS: Two CCR carriers were found among the 1,625 males and another 47 cases identified from the databases. Among the 49 CCR carriers, there were 17 three-way exchange cases (34.7%), 17 double two-way exchange cases (34.7%), and 15 exceptional cases (30.6%), with no statistically significant differences in the incidence of the three types (P > 0.05). Azoospermia- or oligospermia-induced infertility was found in 19 (38.8% ) of the CCR carriers. A total of 87 pregnancies were achieved in the other 30 (61.2%), among which spontaneous abortion occurred in 75.9% (66/87), dead fetus and malformed infant death in 9.2% (8/87), and phenotypically normal offspring in 14.9% (13/87). Recurrent abortion was associated frequently with breakpoints on CCR-involved chromosomes 6, 7, 8, 11, and 16, while dyszoospermia mostly with breakpoints on CCR-involved chromosomes 10 and 14. The breaking occurred more than 3 times at 1p22, 1q25, 2q31, 5p13, 5q35, 6q23, 8q13, and 20p13. Moreo- ver, the breakpoints at 2q31, 5q35, and 8q13 were particularly related to recurrent abortion, while that at 1p22 only to dyszoospermia. CONCLUSION: CCR is extremely rare. Male CCR carriers are often identified through reproductive problems and have high risks of infertility and abnormal pregnancy and a very low rate of normal newborns. In addition, chromosomes and breakpoints involved in CCR may affect the fertility of male CCR carriers, and some particular chromosomal breakpoints may play a key role in gametogenesis.

Draft Genome Sequence of the Human-Pathogenic Bacterium Vibrio alginolyticus E0666.

Vibrio alginolyticus is a Gram-negative halophilic bacterium with worldwide distribution. In this work, we report the draft genome sequence of a V. alginolyticus strain (E0666) isolated from Epinephelus coioides ascites in the Shantou city of Guangdong Province, China.

Expression and biological significance of human kallikrein 6 in gastric cancer tissues.

AIM OF THE STUDY: This study aims to investigate the expression of human kallikrein 6 (hK6) in gastric cancer, gastric ulcer and normal gastric mucosa tissues and its biological significance. MATERIAL AND METHODS: The expression of hK6 in 15 normal gastric mucosa (NGM) tissues, 15 gastric ulcer (GU) tissues and 55 gastric carcinoma (GC) tissues was respectively detected by immunohistochemistry. The correlations between the expression of hK6 and the clinical pathological parameters of gastric cancer were also analyzed. RESULTS: Human kallikrein 6 was mainly expressed in cytoplasm. The positive rate of hK6 was significantly higher in gastric cancer tissues than that in gastric ulcer or normal gastric mucosa tissues (70.9%, 40% and 20%, respectively, p < 0.01). With the increase of the invasion depth of gastric cancer cells, aggravation of TNM stage and development of lymph node metastasis, the expression of hK6 increased significantly (p < 0.05 and p < 0.01). There was no obvious correlation between the expression of hK6 and sex, age, tumor diameter, histodifferentiation degree or primary pathological location of gastric cancer (p > 0.05). CONCLUSIONS: The overexpression of hK6 is related to the depth of invasion, lymph node metastasis and clinical stage of gastric carcinoma, which suggests that hK6 may act as a new marker of gastric cancer biological behavior.

Molecular identification and analysis of human enteroviruses isolated from healthy children in Shenzhen, China from 2010 to 2011.

OBJECTIVE: To determine the prevalence and distribution of human enteroviruses (HEVs) among healthy children in Shenzhen, China. METHOD: Clinical specimens were obtained from 320 healthy children under 5 years old in Shenzhen, China from 2010 to 2011. The specimens were evaluated using real-time PCR and cell cultures. The positive specimens were further tested using reverse transcription-seminested PCR (RT-snPCR). Molecular typing and phylogenetic analysis were based on the sequence determined. RESULTS: Among the 320 samples, 34 were tested positive for HEVs (10.6%) and 22 different serotypes were identified using RT-snPCR. PV1 and PV2 were also detected. The predominant serotype observed was EV71 (17.6%), followed by CV-B4 (14.7%). HEV-B was detected most frequently, with an overall prevalence of 47.1%. HEV-A and HEV-C were found in 32.3% and 20.6% of the samples, respectively. No HEV-D was identified. Molecular phylogeny indicated that all EV71 strains were of C4 genotype. CONCLUSION: Although a variety of HEVs was detected in healthy children, HEV-B was relatively more prevalent than other HEV species. Considering HEV-A is more prevalent than HEV-B among patients with hand-foot-mouth disease, additional long-term surveillance of HEV is warranted in both asymptomatic and symptomatic populations.

[Identification of Nam Dinh virus in China].

During 2009-2012, the Nam Dinh virus (NDiv) was detected from the samples of Culex pipiens quinquefasciatus in Shenzhen China. In this study, cell culture,SYBR Green I based real time RT-PCR and RT-PCR were performed to analyze the cell susceptibility and other biological characteristics of the NDiV isolates. The results showed that C6/36 cell line was susceptible to four isolates of Culex pipiens quinquefasciatus. The "S" type amplification curve and specific melting curve were obtained in the realtime fluorescence quantitative RT-PCR based on SYBR Green I for the detection of the NDiV from the mosquito. The target bands from the RdRp gene and partial fragment of ZmHel1 gene were observed using agarose gel electrophoresis. Both the nucleotide and amino acid sequences of four Shenzhen isolates showed more than 99.00% homology with the Vietnam representative NDiV strain (02VN178). Phylogenetic analysis showed that four Shenzhen isolates shared the same evolution branch as the Vietnam representative NDiV strain. This is the first report of NDiV in China.

Loss of Wnt5a and Ror2 protein in hepatocellular carcinoma associated with poor prognosis.

AIM: To investigate the expression and clinical significance of Wnt member 5a (Wnt5a) and receptor tyrosine kinase-like orphan receptor 2 (Ror2) in hepatocellular carcinoma (HCC). METHODS: In HCC tissues obtained from 85 patients, the protein expressions of Wnt5a, Ror2, ß-catenin, and Ki-67 via immunohistochemical staining using the Envision Plus System. The antibody binding was visualized with 3, 3'-diaminobenzidine tetrahydrochloride (DAB) before brief counterstaining with Mayer's hematoxylin. The degree of immunohistochemical staining was recorded using a semiquantitative and subjective grading system. The mRNA expression of Ror2 was examined by real-time reverse transcription polymerase chain reaction, including nineteen of the 85 HCC and three normal liver tissues. The ratios of Ror2 to the housekeeping gene GAPDH represented the normalized relative levels of Ror2 expression. To determine the prognostic factor, the outcome of the 82 patients was determined by reviewing their medical charts. The overall and disease-free survival rates were estimated using the Kaplan-Meier method and compared with the log-rank test. The prognostic analysis was carried out with univariate and multivariate Cox regressions models. RESULTS: Compared to nontumorous (hepatitis or cirrhotic) tissues, Ror2 mRNA expression was clearly decreased in HCC. Ror2 and Wnt5a protein expressions in the majority of HCC patients (63% and 77%, respectively) was significantly less in tumor tissues, as compared to adjacent nontumorous tissues, and this reduction was correlated with increasing serum α-fetoprotein and tumor stage. In 68% (58/85) of the HCC cases, the expression of ß-catenin in tumor tissues was either downregulated in the cellular membrane, upregulated in the cytoplasm, or both. Survival analysis indicated that Wnt5a and Ror2 protein expressions could be regarded as independent prognostic factors for HCC; HCC patients with decreased Wnt5a or Ror2 protein expression had a poorer prognosis than those with elevated Wnt5a and Ror2 expression (P = 0.016, P = 0.007, respectively). CONCLUSION: Wnt5a and Ror2 may serve as tumor suppressor genes in the development of HCC, and may serve as clinicopathologic biomarkers for prognosis in HCC patients.

[A survey of Japanese encephalitis antibody migrant workers in Shenzhen 2009].

OBJECTIVE: To understand the immunological status of Japanese encephalitis (JE) antibodies amongst migrant workers and to provide epidemiological basis for public health strategies on JE prevention and control in Shenzhen. METHODS: A multi-stage random sampling method was used, and 1003 migrant workers aged 18 to 60 from 44 factories were investigated and their serum specimens were collected. The enzyme-linked immunosorbent assay (ELISA) was used to detect JE antibodies qualitatively. RESULTS: The gross IgG seroprevalence rate for JE was 20.2% (203/1003). Sex-specified seroprevalence was 21.2% (103/485) for male and 19.3% (100/518) for female, respectively (χ(2) = 579, P > 0.05). Age-specific seropositive rates were 22.6% (12/53) for those below 20 years old, 18.7% (120/642) for those between 20-years old, 26.0% (58/223) for those between 30-years old and 15.3% (13/85) for those on or above 40 years old (χ(2) = 7.96, P > 0.05). Proportions for self-reported positive immunization, non-immunization and unclear immunization history were 22.1% (30/136), 22.1% (51/231) and 19.2% (122/636), respectively (χ(2) = 501, P > 0.05). Seroprevalence by region of origins showed that workers from Guangdong province was the highest (30.5%, 50/164), followed by workers from Guangxi (29.7%, 22/74) whilst workers from Shan(3)xi (5.4%, 2/37) had the lowest rate. Seroprevalence rate for managers (29.0%, 31/107) was higher than that of technicians (7.1%, 1/14) (χ(2) = 21.78, P < 0.05). Serological positive rate of workers with university or above educational background was the highest (32.7%, 16/49), followed by that for individuals with college degree (10.3%, 10/97) (χ(2) = 13.02, P < 0.05). CONCLUSION: No associations are detected between JE seroprevalence and age, or sex, or self-reported immunization histories amongst migrant labor workers in Shenzhen. However, correlations between JE serological positive rate and region of origins, occupation and educational attainment are found to be significant. The gross seroprevalence of JE antibodies suggests that the level of JE antibodies amongst Shenzhen migrant workers is low and the population immunity barrier has yet to be established. It is necessary to strengthen prevention and control strategies of JE among labor workers of Shenzhen.

RNA interference-mediated silencing of UBCH10 gene inhibits colorectal cancer cell growth in vitro and in vivo.

1. UbcH10 is the cancer-related E2 ubiquitin-conjugating enzyme, and its overexpression has been demonstrated in a variety of malignancies. The aim of the present study is to silence UbcH10 gene by RNA interference (RNAi) and to observe its inhibitory effect on the colorectal cancer cell growth in vitro and in vivo. 2. We constructed the expression vector pGPU6/GFP/Neo/UbcH10-RNAi (pUbcH10-RNAi), which contained a UbcH10 short hairpin RNA expression cassette. Then the UbcH10 gene silencing cell lines LoVo/UbcH10-RNAi and HT-29/UbcH10-RNAi were established. Reverse transcription-polymerase chain reaction and western blot analysis were used to evaluate the expression of the UbcH10 gene. Cell Counting Kit-8 was used to assess properties of tumour cell growth in vitro. Flow cytometry was used to detect the effect of pUbcH10-RNAi on the cell cycle of colorectal cancer cells. Furthermore, the anti-tumour effects of pUbcH10-RNAi were evaluated in vivo in a nude mouse xenografts model. 3. Results demonstrated that UbcH10 gene expression was significantly decreased in pUbcH10-RNAi treated cells. Colorectal cancer cells growth was markedly suppressed in the pUbcH10-RNAi group compared with control conditions and colorectal cancer cells were arrested in the G2-M phase. In vivo, the downregulation of UbcH10 gene expression by pUbcH10-RNAi also inhibited tumour growth in a nude mice xenograft model. 4. Our study suggests that RNA interference-mediated silencing of UbcH10 gene has anti-tumour activity on colorectal cancer and might have therapeutic potential for the treatment of colorectal cancer.

[Correlation of hK6 expression with clinicopathological features and prognosis in epithelial ovarian cancer].

OBJECTIVE: To approach the relationship between the expression of hK6 in ovarian neoplasm and clinicopathological variables and prognosis in ovarian cancer patients for finding a new tumor marker of the ovarian cancer. METHODS: The expression of hK6 was detected by immunohistochemistry in 19 cases of benign, 11 cases of borderline and 45 cases of malignant ovarian neoplasms and statistically analyzed whether its expression correlate with clinicopathological variables and prognosis in patients with ovarian cancer. RESULTS: The expression of hK6 in ovarian cancer tissues (60.0%) was significantly higher than that in the benign (15.8%) and borderline (27.3%) ovarian neoplasm tissues (P < 0.01). The expression of hK6 in higher-grade ovarian cancer tissues (68.4% ) was higher than that in low-grade ones (14.3%, P < 0.05). The expression of hK6 in late-stage (stage III, 76.7%) was significantly higher than that in early-stage (stage I or II, 26.7%, P < 0.01). The expression of hK6 was significantly higher in patients with lymph node metastasis (77.8%) than that in patients without (33.3%, P < 0.01). The expression of hK6 in the cancer tissues in the patients died, or with reccurence or metastasis within 3 years after surgery was higher (75.0%) than that in the patients with stable disease (42.9%, P < 0.05). CONCLUSION: The expression of hK6 in ovarian cancer was higher than that in benign and borderline ovarian neoplasms. The expression of hK6 is higher in the ovarian cancer of late stage, higher-grade, with lymph node metastasis and is associated with a poorer prognosis. hK6 may become a new markers in prediction of prognosis of the patients with ovarian tumors.

[Mechanism of endogenous carbon monoxide effect on hydrogen sulfide in guinea pigs with established allergic rhinitis].

OBJECTIVE: To study the effect of carbon monoxide (CO) on hydrogen sulfide (H2S) in guinea pigs with allergic rhinitis (AR) through intervention treatment. METHODS: AR model in guinea pigs was established by using ovalbumin. The animals were divided into three groups. Group one was sensitized continuously by ovalbumin, group two was treated with Hemin as induction group, and group three was treated with zinc protoporphyrin (ZnPP) as suppression group. The guinea pigs treated with saline were used as control. The behavior science scores, eotaxin concentration of nasal lavage, IgE in blood serum were recorded, and the plasma concentrations of CO and H2S were determined, then the expression of hemeoxygenase (HO)-1, cystathionine-beta-synthase (CBS) and cystathionine-gamma-lyase (CSE) were measured in nasal mucosa by fluorescent quantitative RT-PCR. RESULTS: The behavior science scores, concentration of eotaxin in nasal lavage, IgE in blood serum and concentration of CO in plasma of sensitized group were higher than those of control (P<0.01), and the expression of HO-1 in nasal mucosa was also higher than control [(7.61+/-2.80)x10(-3) vs (2.32+/-1.14)x10(-3), P<0.05]. All these items were higher when treated with Hemin and lower when treated with ZnPP (P<0.05). The concentration of H2S in plasma was lower than control with significant differences [(14.80+/-1.60) micromol/L vs (18.90+/-1.00) micromol/L, P<0.01], the expression of CSE was also lower than control (P<0.05), and both of them were lower with Hemin induced and higher with ZnPP (P<0.05). The expression of CBS was very low and had no significant differences between groups (P>0.05), so it indicated that the CSE was the key enzyme for endogenous H2S product in nasal mucosa. Moreover the concentration of H2S was negatively correlated with CO (r=-0.702, P<0.001). CONCLUSIONS: Endogenous CO and H2S play a significant role in the pathogenesis of AR, and HO-1 and CSE are the main speed-relate enzymes respectively. The H2S is also influenced by CO.

[Influence of carbon monoxide on the expression of inducible nitric oxide synthase mRNA in guinea pigs with allergic rhinitis.].

OBJECTIVE: To study the impact of carbon monoxide (CO) on expression levels of inducible nitric oxide synthase (iNOS) mRNA in guinea pigs with allergic rhinitis (AR). METHODS: Twenty four guinea pigs were divided randomly into four study groups with 6 guinea pigs in each. The guinea pigs in the first group were treated with saline only (Group 1, the healthy controls). The remaing guinea pigs were sensitized by ovalbumin and thus establishing the AR models. After sensitization, the animals in the second group remained untreated (Group 2, AR control group). The third group was treated with Hemin as the induction group, and the fourth group was treated with Zinc protoporphyrin (ZnPP) as the suppression group. The plasma concentration of carboxyhemoglobin (COHb) was measured, which represents the concentration of CO. The expression levels of Heme oxygenase-1 (HO-1) and NOS mRNAs in nasal mucosa were determined by fluorescent quantitative RT-PCR. RESULTS: AR models were established successfully in all study guinea pigs. The concentrations of COHb (x(-) +/- s) in plasma of the second group (2.27% +/- 1.13%) were significantly (q = 4.10, P < 0.01) higher than those of healthy controls (1.08% +/- 0.24%). The plasma concentration of COHb in the third group (3.17% +/- 0.68%) were also significantly higher (q = 3.12, P < 0.05) than those in the second group. The expression levels of HO-1 and iNOS in nasal mucosa of the second group [(7.80 +/- 1.60) x 10(-3) and (5.81 +/- 0.05) x 10(-3), respectively] were also significantly (q equals 5.52 and 7.21, respectively, P < 0.01) higher than those of controls [(1.96 +/- 0.71) x 10(-3) and (0.97 +/- 0.05) x 10(-3), respectively]. The expression levels of HO-1 and iNOS in the nasal mucosa of the third group [(11.89 +/- 4.78) x 10(-3) and (7.42 +/- 0.70) x 10(-3), respectively] were significantly (q equals 3.86 and 2.22, P < 0.05) higher than those of the second group. The expression levels of HO-1 and iNOS in nasal mucosa of the fourth group [(3.82 +/- 0.98) x 10(-3) and (2.34 +/- 0.04) x 10(-3), respectively] were significantly (q equals 3.76 and 5.18, P < 0.05) lower than those in the second group. CONCLUSIONS: Endogenous carbon monoxide influenced the expression levels of iNOS in nasal mocusa in guinea pigs with AR.