Research Progress of Systemic Immune Inflammatory Index in Prostate Cancer

Prostate cancer has gradually risen to become the second most common cancer threatening men’s health, and prostate-specific antigen (PSA), as the main screening indicator for prostate cancer, has the defects of low specificity and insufficient diagnostic efficacy. As a novel inflammatory index based on neutrophil, lymphocyte and platelet counts, the systemic immune-inflammation index (SII) has recently become a more powerful biomarker for predicting the occurrence and progression of various malignancies. SII reflects the systemic inflammatory response of prostate cancer patients in a more balanced manner, and has higher predictive value than neutrophil-to-lymphocyte ratio (NLR) and platelet-to-lymphocyte ratio (PLR). High SII values are often associated with cancer progression and poor prognosis. This article reviews the research progress of SII in prostate cancer, in order to provide guidance for clinical practice.

Correlation between preoperative systemic immune inflammation index, nutritional risk index, and prognosis of radical resection of liver cancer

BACKGROUND Radical surgery is the most commonly used treatment for hepatocellular carcinoma(HCC).However,the surgical effect remains not ideal,and prognostic evaluation is insufficient.Furthermore,clinical intervention is rife with uncertainty and not conducive to prolonging patient survival.AIM To explore correlations between the systemic immune inflammatory index(SII)and geriatric nutritional risk index(GNRI)and HCC operation prognosis.METHODS This retrospective study included and collected follow up data from 100 HCC.Kaplan–Meier survival curves were used to analyze the correlation between SII and GNRI scores and survival.SII and GNRI were calculated as follows:SII=neutrophil count×platelet count/lymphocyte count;GNRI=[1.489×albumin(g/L)+41.7×actual weight/ideal weight].We analyzed the predictive efficacy of the SII and GNRI in HCC patients using receiver operating characteristic(ROC)curves,and the relationships between the SII,GNRI,and survival rate using Kaplan–Meier survival curves.Cox regression analysis was utilized to analyze independent risk factors influencing prognosis.RESULTS After 1 year of follow-up,24 patients died and 76 survived.The area under the curve(AUC),sensitivity,specificity,and the optimal cutoff value of SII were 0.728(95%confidence interval:0.600-0.856),79.2%,63.2%,and 309.14,respectively.According to ROC curve analysis results for predicting postoperative death in HCC patients,the AUC of SII and GNRI combination was higher than that of SII or GNRI alone,and SII was higher than that of GNRI(P<0.05).The proportion of advanced differentiated tumors,tumor maximum diameter(5–10 cm,>10 cm),lymph node metastasis,and TNM stage III-IV in patients with SII>309.14 was higher than that in patients with SII≤309.14(P<0.05).The proportion of patients aged>70 years was higher in patients with GNRI≤98 than that in patients with GNRI>98(P<0.05).The 1-year survival rate of the SII>309.14 group(compared with the SII≤309.14 group)and GNRI≤98 group(compared with the GNRI>98 group)was lower(P<0.05).CONCLUSION The prognosis after radical resection of HCC is related to the SII and GNRI and poor in high SII or low GNRI patients.

Association between the Lung Immune Prognostic Index and mortality in patients with idiopathic inflammatory myopathy-associated interstitial lung disease

Objective:To explore the association between the Lung Immune Prognostic Index(LIPI)and 1-year all-cause mortality in patients with idiopathic inflammatory myopathy related interstitial lung disease(IIM-ILD).Methods:Patients who were diagnosed with IIM-ILD at West China Hospital,Sichuan University from January 2008 to December 2021 were retrospectively included and categorized into three groups based on LIPI.Univariable and multivariable Cox proportional hazards models were conducted to explore potential association between the LIPI and patients'mortality.Results:A total of 1116 patients were screened,and 830 were included in this study.The multivariable Cox analysis showed that,compared with patients with poor LIPI,the hazard ratio(HR)for all-cause 1-year mortality was 0.22(95%CI 0.05-0.93,P=0.04)for patients in the good LIPI group(LDH<250 IU/L and dNLR<3).After excluding patients lost to follow-up within one year,a similar result was found for LIPI(HR 0.20,95%CI 0.05-0.86;P=0.03).Conclusions:Good LIPI was independently associated with decreased risk of all-cause 1-year mortality in patients with IIM-ILD.This easy-to-obtain index might be served as a potential marker for assessing the prognosis of IIM-ILD.

The Effect of Nebulized Budesonide Inhalation in Treating Children with Asthma and its Influence on Immune Indexes

Objective:To explore and analyze the effect of nebulized budesonide inhalation on children with asthma and its influence on immune indexes.Methods:300 children who were with asthma admitted to the Pediatric Respiratory Department of our hospital from January 2021 to January 2023 were selected as the research subjects.The patients were divided into a nebulization group(n=150)and a reference group(n=150)by drawing lots.The nebulization group received routine treatment along with budesonide nebulization inhalation therapy,while the reference group only received routine treatment.The treatment effect,the immune indicators,the time taken for the disappearance of symptoms,and the pulmonary function indicators of both groups were compared.Results:The total efficacy of treatment received in the nebulization group was significantly higher than that in the reference group(P<0.05).Before treatment,there was no statistically significant difference in the CD4^(+),CD8^(+),CD4^(+)/CD8^(+),between the two groups(P>0.05);after treatment,the nebulization group’s CD4^(+),CD8^(+),CD4^(+)/CD8^(+)and other immune indicators were significantly better than the reference group(P<0.05).The time taken for the disappearance of symptoms like wheezing,coughing,crackles,shortness of breath,and other symptoms in the nebulization group was significantly shorter than in the reference group(P<0.05).Before treatment,there was no statistically significant difference in the pulmonary function indexes such as FEV1,PEF,and FVC between the two groups(P>0.05);after treatment,the pulmonary function indexes of the patients in the nebulization group were significantly better than those in the reference group(P<0.05).Conclusion:Nebulized budesonide inhalation therapy has shown significant efficacy in the treatment of pediatric asthma,with notable improvements in immune indicators.Therefore,it is worthy of recommendation and further promotion.

Novel prognostic factors after radical resection of hepatocellular carcinoma: Updating an old issue

In this editorial,I comment on the article by Li et al published in the recent issue of the World Journal of Gastrointestinal Surgery in 2023,investigating the role of some novel prognostic factors for early survival after radical resection of liver cancer.Liver cancer is an important burden among Asian and Western popu-lations,despite recent advances in both medicine(from virus eradication to systemic target therapies)and surgery.However,survival after proven radical surgery remains poor,with recurrences being the rule.Many prognostic scores have been developed and validated to select those patients who will best benefit from radical liver surgery,although the final general and oncological outcomes continue to be highly jeopardized.Unfortunately,no single biomarker can resolve all these issues for hepatocellular carcinoma,and it remains to be proven whether some of them main-tain predictive power in the long-term follow-up.In the ongoing era of“preci-sion”medicine,the novel prognostic markers,including immune inflammatory and nutritional indexes could be of great help in better stratify surgical candi-dates.

Prognostic impact of preoperative nutritional and immune inflammatory parameters on liver cancer

The immune response to tissue damage or infection involves inflammation,a multifaceted biological process distinguished by immune cell activation,mediator secretion,and immune cell recruitment to the site of injury.Several blood-based immune-inflammatory biomarkers with prognostic significance in malignancies have been identified.In this issue of the World Journal of Gastrointestinal Surgery,they examined the prognosis of liver cancer radical resection in relation to pre-operative systemic immune-inflammation and nutritional risk indices.Comparing older and younger individuals often reveals compromised nutritional and immu-nological statuses in the former.Therefore,performing preoperative evaluations of the nutritional status and immunity in geriatric patients is critical.In addition to being a primary treatment modality,radical resection is associated with a sig-nificant mortality rate following surgery.Insufficient dietary consump-tion and an elevated metabolic rate within tumor cells contribute to the increased proba-bility of malnutrition associated with the ailment,consequently leading to a sub-stantial deterioration in prognosis.Recent studies,reinforce the importance of nu-tritional and immune-inflammatory biomarkers.Prior to surgical intervention,geriatric nutritional risk and systemic immune-inflammatory indices should be prioritized,particularly in older patients with malignant diseases.

Evaluation of the Efficacy of Alanyl-Glutamine for Nutritional Support in Septicemia

Objective:To evaluate the therapeutic efficacy of alanyl-glutamine(Ala-Gln)in the nutritional support of sepsis.Methods:120 cases of sepsis patients admitted to the hospital in the past three years were selected and grouped by randomization method,Group A was treated with Ala-Gln,and Group B was treated with conventional nutritional support therapy,and the therapeutic effects were compared.Results:Before treatment,there was no difference in nutritional indexes,immune function indexes,and inflammatory factors between the two groups(P>0.05).After treatment,the nutritional indexes of Group A were higher than those of Group B,the immune function indexes were higher than those of Group B,and the inflammatory factors were lower than those of Group B(P<0.05).Except for mortality,the regression of group A was better than that of group B(P<0.05).Conclusion:Ala-Gln can improve the nutritional indexes of septicemia patients during the treatment period,enhance their immune function,reduce the inflammatory response of the body,and promote the regression of the disease.

Systemic immune inflammation index, ratio of lymphocytes to monocytes, lactate dehydrogenase and prognosis of diffuse large Bcell lymphoma patients

BACKGROUND In malignant tumors,inflammation plays a vital role in the development,invasion,and metastasis of cancer cells.Diffuse large B-cell lymphoma(DLBCL),the most common malignant proliferative disease of the lymphatic system,is commonly associated with inflammation.The international prognostic index(IPI),which includes age,lactate dehydrogenase(LDH),number of extranodal lesions,Ann Arbor score,and Eastern Cooperative Oncology Group(ECOG)score,can evaluate the prognosis of DLBCL.However,its use in accurately identifying highrisk patients and guiding treatment is poor.Therefore,it is important to find novel immune markers in predicting the prognosis of DLBCL patients.AIM To determine the association between the systemic immune inflammation index(SII),ratio of lymphocytes to monocytes(LMR),ratio of LMR to LDH(LMR/LDH),and prognosis of patients with DLBCL.METHODS A total of 68 patients diagnosed with DLBCL,treated in our hospital between January 2016 and January 2020,were included.χ2 test,Pearson’s R correlation,Kaplan Meier curves,and Cox proportional risk regression analysis were used.The differences in the SII,LMR,and LMR/LDH among patients with different clinicopathological features were analyzed.The differences in progression-free survival time among patients with different SII,LMR,and LMR/LDH expressions and influencing factors affecting the prognosis of DLBCL patients,were also analyzed.RESULTS The LMR and LMR/LDH in patients with Ann Arbor stage III–IV,ECOG score≥2,and SII,IPI score 2–5 were significantly higher than those of patients with Ann Arbor stage I-II and ECOG score<2(P<0.05).Patients with high SII,LMR,and LMR/LDH had progression-free survival times of 34 mo(95%CI:32.52–38.50),35 mo(95%CI:33.42–36.58)and 35 mo(95%CI:33.49–36.51),respectively,which were significantly lower than those with low SII,LMR,and LMR/LDH(P<0.05);the SII,LMR,and LMR/LDH were positively correlated(P<0.05).Cox proportional risk regression analysis showed that the SII,LMR,and LMR/LDH were influencing factors for the prognosis of DLBCL patients(hazard ratio=1.143,1.665,and 1.704,respectively;P<0.05).CONCLUSION The SII,LMR,and LMR/LDH are related to the clinicopathological features of DLCBL,and they also influence the prognosis of patients with the disease.

Effects of Traditional Chinese Herbal Medicine on Immune Organ Indexes and Macrophages Phagocytic Indexes in Chickens Infected by Infectious Bronchitis Virus

[ Objective] To study the therapeutic effects of traditional Chinese medicine prescriptions on infectious bronchitis （IB） and find a novel avenue for prevention and treatment of viral diseases in poultry. [Method] A total of 160 cockerels at the age of 15 d were divided into four groups randomly, including traditional Chinese medicine group, moroxydine control group, challenge control group and healthy control group. Except the healthy control group, other groups were challenged with infectious bronchitis virus （IBV） on Day 15. After 48 h post challenge, the traditional Chinese medicine groupand moroxydine control group were respectively administrated with Chinese herbal medicine prescription and moroxydine, continuously for 5 d. The immune organ indexes and macrephage phagocytic indexes were detected on Day 18, 24 and 30, respectively. [ Result] The immune organ indexes and macrophage phagocytic indexes were not significantly different between traditional Chinese medicine group and moroxydine control group on Day 18. But all the indexes of the traditional Chinese medicine groups were increased significantly （ P 〈 0.05） on Day 24 and 30, and showed extremely significant difference （ P 〈 0.01 ） with those of challenge control group on Day 30. [ Conclusion] The traditional Chinese herbal medicine can enhance macrophage phagocytic indexes and immune organs indexes of chickens infected by IBV.

Study on the correlation between TCM syndrome differentiation and immune inflammation index of Sjogren's syndrome

Objective:To observe the relationship between the distribution of TCM Syndromes of primary Sjogren's syndrome(pSS)and the changes of erythrocyte sedimentation rate(ESR),C-reactive protein(CRP),tumor necrosis factor-α(TNF-α),interleukin-6(IL-6),immunoglobulin IgA,IgG and IgM.Methods:157 diagnosed PSS patients were divided into dampness heat obstructing collaterals syndrome,dryness evil invading lung syndrome,Qi blood stasis syndrome,liver kidney yin deficiency syndrome and Qi Yin deficiency syndrome according to TCM syndrome differentiation standard.The age,course of disease,general health score in international universal quality of life scale,self rating Anxiety scale(SAS),self rating Depression Scale(SDS)and erythrocyte sedimentation rate were observed and detected(ESR,C-reactive protein(CRP),tumor necrosis factor-α(TNF-α),interleukin-6(IL-6),immunoglobulin IgA,IgG and IgM and other immune inflammatory indexes were detected.The relationship between different TCM Syndromes of PSS and molecular level changes of immune inflammatory indexes was analyzed and compared,as well as the impact on quality of life and mental emotion.Results:The overall health score of patients with Qi Yin deficiency syndrome was significantly lower than that of patients with dampness heat obstructing collaterals and dampness evil invading lung syndrome(P<0.01),while the SAS and SDS scores of patients with Qi Yin deficiency syndrome were significantly higher than those of patients with dampness heat invading lung syndrome and dampness heat obstructing collaterals syndrome(P<0.05,P<0.01);ESR,CRP,RF,TNF-α,IL-6,IgA,IgG and IgM related laboratory indexes of patients with dampness heat obstructing collaterals syndrome were significantly higher than those of patients with dry evil invading lung syndrome,liver kidney yin deficiency syndrome and liver kidney yin deficiency syndrome Qi Yin deficiency syndrome and Qi blood stasis syndrome(P<0.05,P<0.01).Correlation test found that the above five syndrome types were positively correlated with hs-CRP,IL-6,TNF-ɑindicators(P<0.05).Conclusion:The overall health,SAS,SDS and related hs-CRP,IL-6,TNF-ɑand some others indexes of SS patients are associated with TCM syndromes.

Effects of Dietary Picria felterrae Lour Extracts on Serum Biochemical Indexes and Immune Function of Guangxi Partridge Chickens

[Objective] This trial was to investigate the effect of dietary Picria felterrae Lour extracts on serum biochemical indexes and immune function of Guangxi Partridge chickens. [Method] Totally 500 individuals of 1-day-old Guangxi Partridge chickens were randomly divided into five groups, five replicates each group and 20 chicks each replicate. Groups A, B and C were treatment groups supplemented with 0.70%, 0.35% and0.175% P. felterrae extracts in the basal diet, respectively; group D was a medical control group supplemented with 0.01% colistin sulfate premix in the basal diet; and group E was a control group with basal diet. Serum samples were collected from 10 chickens in each group at 21, 35 and 49 days of age, to analyze the biochemical and immune indexes. [Result] It had no significant impact on serum TP and GLU contents of chickens by adding different levels of P. felterrae extracts in the basal diet（P 〉0.05）. However, at 21 and 35 days of age, the TBILI content of chickens in groups A, B and C were extremely lower or significantly lower than that in group E（ P〈0.01; P〈0.05）. At 35 days of age, the serum AKP activities in groups A, B and C were extremely higher than that in group E（P〈0.01）, and the serum GOT activities at 21 and 35 days of age in group C were significantly higher than that in group E（P〈0.05）. At 49 days of age, the serum Ig G content in groups A, B and C and the IL-2 content in group B and group C were significantly lower or extremely lower than that in group E（ P〈0.05; P〈0.01）; the T-AOC content in group B was significantly higher than that in group E（P〈0.05）; the GSH content in groups A, B and C were significantly higher than that in group E（ P〈0.05）. Adding different levels of P. felterrae extracts in the diet significantly decreased the TBILI content, reduced the Ig G, IL-2 and IL-6 contents, and improved the AKP and GOT activities and the T-AOC and GSH contents of Guangxi Partridge chicken. [Conclusion] Adding 0.35% P. felterrae extracts in the basal diet received the best effort.

Therapeutic Effect of Daphnetin on Mastitis Induced by Staphylococcus aureus in Mice

[Objectives]To observe the effects of daphnetin on mastitis induced by Staphylococcus aureus in mice.[Methods]18 postpartum ICR female mice were used to establish mastitis animal model,and were randomly divided into three groups(A,B,and C)with 6 mice in each group.Group A:blank control group;group B:S.Aureus model group;group C:S.Aureus model+daphnetin group.The experimental groups were injected 1 mL of 1.0×104 CFU/100μL of S.aureus of along the nipple catheter.The suspension was placed in the 3 rd and 4 th pairs of mammary glands,and the control group was injected with the same dose of normal saline.On the second day after infection,the rats in group A,B and C were given drugs by gavage,while the rats in group A and B were given normal saline and the rats in group C were given daphnetin once a day for 6 consecutive days.Blood samples were collected from living eyeballs,and blood cells were analyzed by automatic flow cytometer after anticoagulation.[Results]The NLR and Systemie Immune Inflammati-on Index(SII)in the blood of mastitis mice induced by S.aureus were significantly higher than those in the control group(P<0.01),suggesting that neutrophil to lymphocyte ratio(NLR)and SII can be used as diagnostic indicators of mastitis,and the levels of NLR and SII decreased significantly after daphnetin intervention.[Conclusions]NLR and SII showed high levels in mastitis mice,which are valuable for the diagnosis of mastitis and the evaluation of its prognosis.After the intervention of daphnetin,both of them decreased significantly,indicating that daphnetin has a good prognosis trend in mastitis mice induced by S.aureus.

Effect of Glycyrrhiza uralensis Fisch polysaccharide on growth performance and immunologic function in mice in Ural City,Xinjiang

Objective:To discuss the effect of Glycyrrhiza uralensis(G.uralensis) Fisch polysaccharide on growth performance and immunologic function in mice in Ural City,Xinjiang and to provide important data supporting the application of Glycyrrhiza polysaccharide.Methods:A total of100 Kunming mice aged 3 weeks old were randomly divided into 5 groups with 20 mice in each group(10 were females and 10 were males).About 0.5 mL normal saline was given to the mice of control group every day and 0.5 mL G.uralensis Fisch polysaccharide was given to the mice of other groups at the concentration of 1,20,50 and 100 mg/mL respectively.The growth performance(average body weight,average daily feed intake and feed efficiency),immune organ indexes(spleen index and thymus index) and immunologic function(serum IL-2,CD4^+/CD8^+ and the activity of NK cells) of mice in each group were detected continuously.Results:The average body weight,feed efficiency,serum IL-2,CD4^+/CD8^+ and the activity of NK cells of mice were increased with the increase of administrated time after administrating G.uralensis Fisch polysaccharide and were reached up the largest level on Day 28.At the same time,each index was proportional to the given dose and was significantly higher than those of control group and reached up the largest level at the administrated dose of 100 mg/mL.After administrating G.uralensis Fisch polysaccharide,the spleen index and thymus index of mice were increased with the increase of administrated dose and the spleen index and thymus index of mice administrated with the dose of 100 mg/mL were maximum which was more than 1.51 times and 1.43 times of that in control group respectively and the comparative differences showed statistical significance(P<0.05).The average daily feed intake of mice in each group was increased with the passage of lime and at the same time,the comparison of average daily feed intake of mice in each group was not significantly different(P>0.05).Conclusions:G.uralensis Fisch polysaccharide can significantly improve the growth performance and immunologic function of mice and laid a research basis for the clinical application of G.uralensis Fisch polysaccharide.

Effect of Fuzheng Jiedu granule on immunological function and level of immune-related cytokines in immune-suppressed mice

Fuzheng Jiedu granule exhibits a number of health benefits and it is thought that the mechanisms involved in these effects are due to the modulation of immunity. In this article, we studied the effect of Fuzheng Jiedu granule on immunological function and the expression of immune-related cytokines in immune-suppressed mice. 72 mice were randomly divided into six groups, with 12 in each group. The control groups included an untreated group, a negative control group（Cyclophosphamide） and a positive control group（Astragalus polysaccharide）. There were three treated groups, which were given different doses of Fuzheng Jiedu granule： a low dose（100 mg kg^（–1））, a medium dose（400 mg kg^（–1）） and a high dose（600 mg kg^（–1））. With the exception of the untreated control animals, each group received an intraperitoneal injection of Cyclophosphamide（100 mg kg^（–1）） for 3 days to establish the immune-suppressed model. Mice were then treated for 19 consecutive days and, 24 h after the last treatment, blood was taken for the eyeballs and serum separation was performed. Analysis was made of the levels of related cytokines（IgA, IgG, IgM, IL-6, IFN-γ, C3, C4 and TNF-α）, the transformation of lymphocytes and the immune organ indexes. The results showed that Fuzheng Jiedu granule can improve the levels of cytokines, the rate of proliferation of lymphocytes and the immune organ indexes of immune-suppressed mice.

Enhancement of Humoral Immune Response of Newcastle Disease Vaccine by ATRA

[ Objective] The paper was to study the immune enhancement of ATRA on Newcastle Disease （ND） vaccine. [ Method ] The 1-day-old AA broilers were treated with ATRA at the doses of I and 5 p.mol/kg, respectively. At 7 and 28 days of age, broilers in drug control group, low dose group and high dose group were immunized with ND vaccine by intranasal and eye immunization approach. At 7, 14, 21, 28, 35, 42 and 49 clays of age, seven chickens were randomly se- lected from each group and weighed. The thymus, spleen, bursa of fabrieius and serum were collected for calculating immune organ index of thymus, spleen and bursa of fabricius. The ND specific antibody titers in serum were determined with HI test. [Result] ATRA promoted the growth of thymus, spleen and bursa of fabricius, and improved the immune organ index and ND specific antibody titers of chicks. [ Conclusion] ATRA enhanced the humoral immune response of chicks, and ATRT at the dose of 5 μmol/kg presented more prominent immune enhancement effect on ND vaccine.

Effects of Dangguibuxue Decoction on Immune Organs and Erythrocyte Immune in Broilers

[ Objective] To study the effects of Dangguibuxue decoction on immune organ and erythrocyte immune in broilers. [ Method] One hun- dred 1 -day-old healthy Sanhuang chickens were randomly divided into five groups, 20 in each group. They were immunized with Newcastle disease vaccine via intranasal inoculation at 7 days old. The chickens in group I, II and III drank water added the Danggguibuxue decoction at proportion of 2%, 5% and 10% （ V/V）, respectively. The chickens in the group IV drank water added Astragalus polysaccharide at proportion of 2% （V/V）. And those in the group V drank water without addition of any drug. Blood was collected via jugular vein at 14, 21 and 28 days old, respectively, and then they were dissected. The immune organ indexes, erythrocyte C3b receptor rosette rate （E-C3b RR） and erythrocyte immune complex rosette rate （E-ICRR） were measured. [ Result] The Dangguibuxue decoction had no significant effect on thymus index but significantly increased spleen index and bursa of Fabricius index. The best peripheral and humoral immunity was observed in the broilers drinking water added the Dangguibuxue decoction at proportion of 10% （ V/ V）, and its immune enhancement was better than that of Astragalus polysaccharide added at proportion of 2% （V/V）. [ Coaclusion] Dangguibuxue decoction can promote maturation of immune organs and enhance erythrocyte immune functions; thus, it can be used as immunolootentiator.

Effect of Shuanghuanglian Propolis Oral Liquid on Immune Function of Broilers

The effects on immune function of broilers was studied by adding different doses of Shuanghuanglian propolis oral liquid in drinking water, to provide a theoretical basis for application and promotion of Shuanghuanglian propolis oral liquid. Ninety one-day-old broilers were randomly divided into three groups ： group I was designed as control; groups Ⅱ and Ⅲ were added with 0.5 and 1.0 mL/L Shuanghuanglian propolis oral liquid in drinking water, respectively. Compared with group I, all tested indicators in groups Ⅱ and Ⅲ were increased at varying degrees as follows ： bursa of fabricius index increased by 5.74% （P 〈 0.05 ） and 7.66% （P 〈 0.05 ） ; thymus index increased by 1.47% （P 〉 0.05 ） and 2.06% （P 〈 0.05 ） ; spleen index increased by 5.88% （P 〉 0.05 ） and 7.84% （ P 〈 0.05 ） ; Newcastle disease virus （NDV） antibody titer increased by 11.99% （P 〈 0.05 ） and 16.94% （P 〈 0.05 ） ; IL-2 content increased by 2.71% （P 〉 0.05） and 4.52% （P 〈 0.05 ） ; IL -6 content increased by 4.04% （P 〉 0.05 ） and 7.26% （ P 〈 0.05 ）, respectively. The results showed that adding 0.5 and 1.0 mL/L Shuanghuangllan propolis oral liquid in drinking water could improve the immune function of broiler and immune effect of ND vaccine.

Effects of All-trans Retinoic Acid (ATRA) against Bacterial Infection in Chickens

In order to investigate the effects of all-trans retinoic acid （ATRA） against bacterial infection in chickens, 35 3-day-old AA broiler chickens were fed adaptively for two days and randomly divided into five groups, including Escherichia coli experimental group （ group 1 ）, Escherichia coli control group （group 2）, blank control group （ group 3 ）, PasteureUa experimental group （ group 4）, and PasteureUa control group （ group 5 ）. At 5 days of age, the chickens in group 1 and group 4 were drenched with 5 p.mol/kg ATRA for seven consecutive days according to their weight; the chickens in group 2, group 3 and group 5 were drenched with an equal volume of dimethyl sulfoxlde （DMSO）. The clinical symptoms and weight changes in each group were observed and recorded. Seven days later, the chickens were euthanized and dissected to determine the immune organ indexes. The results showed that there were significant differences in body weight between ATRA-administrated chickens and non-administrated chickens after bacterial infection （P 〈 0.05 ） ; moreover, the immune organ indexes of ATRA-administrated chickens exhibited significant differences compared with control group （P 〈 0.05 ）, indicating that ATRA could promote the development of immune organs of poultry, thereby enhancing the body immunity against bacterial infection.

Study on Anti-infection Effect of Polysaccharide from Agaricus blazei Murrill on Chickens

In order to study the anti-bacterial infection effect of polysaccharide from Agaricus blazei Murrill on chickens, the experimental groups were orally administrated A. blazei polysaccharide at low dose and high dose, respectively, for 14 d continuously, and then, the chickens in various groups were infected with Escherichia coli or Pasteurella pneumotropica , so as to observe the clinical symptoms of chickens and record the change in body weight. Anatomy was performed 14 d later, and the organ indices were determined, so as to study the anti-bacterial infection effect of A. blazei polysaccharide on chickens. The results showed that after bacterial infection, the high-dose A. blazei polysaccharide group was significantly differed from other groups in changes of body weight and organ indices. It indicates that oral administration of high concentration of A. blazei polysaccharide could promote the development of poultry organs, thereby improving the immunity of organisms.

Analysis on Local and Concurrent Commutation Failure of Multi-infeed HVDC Considering Inter-converter Interaction

This paper provides a comprehensive analysis of local and concurrent commutation failure(CF)of multi-infeed high-voltage direct current(HVDC)system considering multi-infeed interaction factor(MIIF).The literature indicates that the local CF is not influenced by MIIF,whereas this paper concludes that both the local CF and concurrent CF are influenced by MIIF.The ability of remote converter to work under reduced reactive power enables its feature to support local converter via inter-connection link.The MIIF measures the strength of electrical connectivity between converters.Higher MIIF gives a clearer path to remote converter to support local converter,but at the same time,it provides an easy path to local converter to disturb remote converter under local fault.The presence of nearby converter increases the local commutation failure immunity index(CFII)while reducing concurrent CFII.Higher MIIF causes reactive power support to flow from remote converter to local converter,which reduces the chances of CF.A mathematical approximation to calculate the increase in local CFII for multi-infeed HVDC configurations is also proposed.A power flow approach is used to model the relation between MIIF and reactive power support from remote end.The local and concurrent CFIIs are found to be inverse to each other over MIIF;therefore,it is recommended that there is an optimal value of MIIF for all converters in close electric proximity to maintain CFII at a certain level.The numerical results of established model are compared with PSCAD/EMTDC simulations.The simulation results show the details of the influence of MIIF on local CF and concurrent CF of multi-infeed HVDC,which validates the analysis presented.