BACKGROUND:Airborne pollen is the most important factor to induce the seasonal allergic diseases.The production and dispersal of pollen are closely correlated with the meteorological factors.OBJECTIVE:To observe the correlation between the seven meteorological factors (air pressure,air temperature,humidity,precipitation,wind speed,evaporation capacity and sunshine) and the airborne pollen in Nanchang so as to provide theoretic evidences for preventing and treating anaphylactic disease in that region.DESIGN:Observational experiment. SETTING:Department of Allergic Reaction,Jiangxi Medical College.MATERIALS:An investigation on airbome pollen was performed for a year by Durham gravity method.Data of airborne pollen and the seven meteorological factors in urban area of Nanchang city were collected.METHODS:The top of the 4th experimental building in the southern yard of Jiangxi Medical College located in the center of Nanchang city was taken as exposed point.The pollen was surveyed by Durham gravity method from April 1st,2000 to March 31 st,2001.Meteorological data of the seven factors were collected every day and supplied by the Weather Bureau of Jiangxi Province.The correlation between meteorological factors and airborne pollen was analyzed by the multivariate Jinear stepwise regression analysis with SAS 6.12.MAIN OUTCOME MEASURES:The type,amount,seasonal distribution of airborne pollen and the correlation between the seven meteorological factors and the airborne pollen in urban area of Nanchang city. RESULTS:There were airborne pollens in Nanchang city all the year round,which included about 47 types.The main pollen season of Cupressaceae was in March,Pinaceae in March and April, and Cunninghamia R.Br in March,Chenopodium-Amaranthus and Ambrosia from August to November, Artemisia from September to November and Humulus in September.Gramineae had been scattering all seasons but mostly from June to October.In the correlation analysis between dispersal of airbome pollen and seven meteorological factors, multivariate linear stepwise regression analysis was conducted in some major polien counting in steady dispersal period and seven meteorological factors. The positive correlation was found in Pinaceae with air pressure,air temperature,wind speed and sunlight,and the negative correlation was found with precipitation and evaporation capacity.The positive correlation was found in Cupressaceae with air pressure,air temperature and sunlight,and negative correlation was found with humidity,precipitation,wind speed and evaporation capacity.The positive correlation was found in Ambrosia with air pressure,air temperature and wind speed,while negative correlation was found with humidity,precipitation,evaporation capacity and sunshine.The positive correlation was found in Artemisia with air pressure,air temperature and wind speed,while negative correlation was found with humidity,precipitation, evaporation capacity and sunshine.The positive correlation was found in Gramineae with air pressure and air temperature,while negative correlation was found with humidity,precipitation and evaporation capacity.However,if using count of total pollen in a year or half a year to analyze the relationship,the correlated factors were much fewer than that mentioned above.CONCLUSION:The dispersal of airborne pollen is related with the seven meteorological factors.It is better to use the grain amount of single pollen in its main pollen season to analyze the relationship with meteorological factors.

Objective To observe the change of regulatory T cells expression in severely burned rats gut ,To investigate the effects of regulatory T cells on CD3+CD4+ /CD3+CD8+lymphocytes and its relation with gut-origin endotoxin translocation .Meth-ods Fifty SD male rats were randomly divided into normal control group(n=10)and burn model groups(n=40) .Rats were burned to achieve Ⅲ degree scalding ,and a 30% total body surface area(TBSA) burn model was made .Rats were sacrificed before(normal control group) and after 0 .5 ,1 ,2 ,4 burn hour(PBH groups) .Flow cytometry techniques were used for the detection of the expres-sions of regulatory T cells and CD3+CD4+ /CD3+CD8+ lymphocyte in intestinal lymph nodes which were separated .The dynamic turbidity method was used for detection of endotoxin levels in portal vein blood .Results The expression of regulatory T cells was negativelycorrelatedwithCD3+CD4+ /CD3+CD8+ lymphocyteratio(r= -0.827,P<0.01)inintestinallymphnodeofrats,while the regulatory T cells was positively correlated with ET levels in portal vein blood plasma .(r=0 .782 ,P<0 .01) .Conclusion The expression of the regulatory T cells in intestinal lymph node in severely burned rats was increased compared to that in normal con-trol group .Regulatory T cells suppressed the expression of intestinal T lymphocytes ,leading to gut immune inhibition .The translo-cation of intestinal endotoxin has a close relationship with regulatory T cells in severely burned rats .Regulatory T cells could have portal effects on intestinal immunity barrier .

Objective By analyzing the urinary calculi ingredient and 24-hour urinary stone risk factors of urolithiasis patients in Hengyang area,to investigate the effects of diet intervention on recurrence rate in urolithiasis patients,and provide the measures for prevention and treatment.Methods Prospectively collected 692 patients that permanent residents in Hengyang area from September 2008 to September 2012,who had implementation of minimally invasive operation and taken stone specimens to analyze composition,and also collected 24 hours urine to analyze the urinary stone risk factors.They were divided into test group and control group by random number table method,346 cases in each,control group without diet intervention,and test group was given diet intervention according to the stone composition and urinary stonerisk factors.All patients were followed up for 1 year,the urinary stone recurrence rate in Hengyang area was observed.Results Among 692 urolithiasis patients,663 patients completed the study (test group of 341 cases and control group of 322 cases),the expulsion rate was 4.19％(29/692).The 24-hour urinary stone risk factors in control group before and after diet intervention had no significant difference(P ＞ 0.05).In test group after diet intervention,the excretion of ingredients in urine such as dietary calcium (t =3.412,P ＜ 0.05),oxalate(t =3.018,P ＜ 0.05) and uric acid(t =1.990,P ＜ 0.05) was obviously decreased,and urinary citrate (t =3.174,P ＜ 0.05) was increased,but the excretion of ingredients such as magnesium and phosphorus had no significant difference (P ＞ 0.05).After 1 year after diet intervention,the recurrence rate in test group was lower than that in control group [0.88％ (3/341) vs.7.76％ (25/322)],there was significant difference (P ＜ 0.01).Conclusion Diet intervention can effectively reduce the risk of urinary stone according to the stone composition and the 24 hours urine stone risk factors,plays an important role on reducing urinary stone recurrence,which is worth clinical promotion.

Subjective To acquire and analyze adult stage Schistosoma japonicum (Chinese strain) expressed sequence tags and new genes from an adult S. japonicum cDNA library, and to search new vaccine candidates and drug targets. Methods A cDNA library was constructed from adult stage S. japonicum. Clones were selected randomly from the cDNA library and were se-quenced. ESTs and new genes were acquired after analysis in GenBank databases by BLAST and other programs. All ESTs and new genes were submitted to GenBank and received accession numbers. Results 149 ESTs were acquired from a total 382 clones that were randomly selected from the adult S. japonicum cDNA library. All ESTs were successfully submitted to the dbEST at Genbank. Some of them were homologous with sequences of male, female, egg, schistosomula, cercaria and miracidia of S. japonicum. 18 new genes of adult S. japonicum were acquired. Some genes were housekeeping genes and some genes might be interesting as vaccine candidates or drugs targets. Conclusions The EST straltegy is a rapid, efficient and economical method to acquire ESTs and to discover new genes of adult stage S. japonicum from cDNA libraries.[

Objective To explore the influences of extracellular matrices (ECM) secreted by ultraviolet B (UVB)-induced senescent fibroblasts on the proliferation of and extracellular signal-regulated kinase (ERK) signaling in HaCaT cells. Methods Fibroblasts were irradiated with UVB of 15 mJ/cm2 once daily for 5 days to induce premature senescence, which was identified by SA-β-gal staining 72 hours after the last irradiation.HaCaT cells were divided into 3 groups and inoculated into plates coated with extracellular matrices secreted by non-senescent (PRE-ECM) or senescent fibroblasts (SIPS-ECM) or into uncoated plates (NON-ECM), fol-lowed by additional culture. U0126, an inhibitor of ERK1/2, was used to treat the HaCaT cells 1 hour before inoculation. Then, MTT assay was carried out to detect the proliferation of HaCaT cells after a 3-day culture,Western blot to assess the phosphorylation of ERK at 0.5, 1, 2 and 4 hours after the inoculation, flow cytometry to analyse cell cycle and apoptosis after 24 hours of culture. Results The most rapid and intense phosphory-lation of ERK was observed in SIPS-ECM group. Inhibiting the activation of ERK pathway with U0126 could completely suppress the promoting effect of ECM from senescent fibroblasts on the proliferation of HaCaT cells.After the blocking of ERK activation, the proportion of HaCaT cells in S and G2/M phase decreased from 37.40%, 41.34% and 43.31% to 29.41%, 36.48% and 39.96%, respectively, in NON-ECM, PRE-ECM and SCIP-ECM group. Conclusion The ECM produced by UVB-induced senescent fibroblasts promote the prolifera-tion of HaCaT cells via inducing the phosphorylation of ERK.

Objective To study and summary the treatment of talus fracture. Methods Fifteen patients with talus fracture were treated by limited cut off reduction by leverage and hollow lag screw under C arm X-Ray machine January 2008 to November 2014, of whom there were 11 males and 4 females, aged 15-61 years old. Seven patients sufferred from talus fracture because of traffic accidents, 4 patients because of falls, 2 patients because of crush injury, and 2 patients because of sprains. Hawkins typing:Ⅰtype in 1 patient, Ⅱ type in 6 patients, Ⅲ type in 6 patients of Ⅲ type, and Ⅳ type in 2 patients. Results Followed up for 6 months to 4 years (mean 1.5 years), fracture healed better. Hawkins grading standard:9 patients showed excellent (1 patient ofⅠtype, 5 patients ofⅡtype, 3 patients ofⅢtype), and two patients showed good (Ⅲtype). The excellent and good rate was 11/15. Necrosis of talus occurred in one patient, and degenerative joint disease occured in one patient. Conclusions Minimally invasive internal fixation with hollow lag screw under C arm X-Ray machine in the treatment of talus fracture has a small injury to the periosteum and the blood supply of small soft tissue. It can fix reliably and can pressurize the fracture fragments, and is conducive to fracture healing.

Objective To investigate cartilage oligomeric matrix protein( COMP) gene mutation in a three-generation pedigree with two cases of pseudoachondroplasia, and to definitize genotype-phenotype correlation. Methods The clinical data and peripheral blood were collected from the patients with pseudoachondroplasia and their family members. All the 19 exons and their flanking sequences of COMP gene in two patients and three unaffected family numbers and 50 unrelated individuals were analyzed by PCR amplification and direct sequencing. Results The proband, a 6-year-old girl presented with typical clinical features of pseudoachondroplasia, including disproportionate short limb dwarfism, staggering gait, double genu varus deformity, and wider clinical and imaging long bone metaphysis. The 33-year-old father showed a similar manifestation including disproportionate short limb dwarfism and double genu varus deformity, and was performed correcting operation on lower limbs for double genu varus at the age of 10 years. DNA sequencing analysis of the COMP gene revealed a del mutation ( c. 1417 1419delGAC)in exon 13 in two patients with pseudoachondroplasia, but not in the other unaffected members from the pedrgree and 50 control subjects. Conclusion A del mutation c. 1417 1419delGAC of COMP gene may contribute to the disease in the pedigree.

Brain tuberculosis is difficult to diagnose with low incident and high mortality and mobidity.Early diagnosis and timely treatment are the keys to prognosis.In recent years,reports of brain stem tuberculosis gradually increased with the improvement of diagnosing techniques.To further understand brain stem tuberculosis,the pathogenesis,clinical manifestation,feasibility of diagnosis,treatment,prognosis and vaccination are reviewed.

Objective:To evaluate the applicability of the Zhang′s diagnostic criteria for atopic dermatitis (AD) in adolescents and adults from southern Jiangsu.Methods:A total of 1 769 patients were collected, who were newly diagnosed with eczema or AD in departments of dermatology of 7 hospitals in southern Jiangsu from May 2019 to May 2021. A standardized survey interview was conducted with patients by dermatologists using a self-designed questionnaire, which included patient′s personal information, relevant medical history, clinical characteristics, laboratory tests, etc. Using Hanifin-Rajka criteria as the gold standard, the sensitivity and specificity of the Williams criteria, Zhang′s criteria and Japanese Dermatological Association (JDA) criteria were evaluated, separately.Results:Among the 1 769 patients, there were 759 (42.9%) males and 1 010 (57.1%) females, aged 32.2 ± 8.2 years (range, 12 - 79 years) . Pruritus was the most common clinical feature among the AD patients (883/913, 96.7%) . When using the Hanifin-Rajka criteria as the gold standard, 913 (51.6%) subjects were diagnosed with AD; the sensitivity of Zhang′s criteria reached 92.6% (845/913) , and its specificity was 73.2% (627/856) ; the sensitivity of Williams′ criteria was 87.8% (802/913) , and its specificity was 81.3% (696/856) ; the sensitivity of JDA criteria reached 96.9% (885/913) , and its specificity was 68.9% (590/856) . The consistency in the diagnosis of AD was moderate between the Zhang′s criteria and Williams criteria (Kappa = 0.61, P = 0.009) , was relatively high between the Zhang′s criteria and JDA criteria (Kappa = 0.85, P = 0.001) , and was moderate between the Williams criteria and JDA criteria (Kappa = 0.51, P = 0.013) . Conclusions:Compared with the Hanifin-Rajka criteria, the Zhang′s criteria exhibit good sensitivity and specificity for the diagnosis of AD among adolescents and adults in southern Jiangsu. However, pruritus remains important for the diagnosis of AD.

Pigeons show flocking and homing behaviors,which require characteristics including long-distance weight-bearing and continuous flight,with excellent navigation and spatial cognitive abilities.Pigeons have been widely used in animal robot research in recent years.Pigeon robots achieve motor behavior control by applying neural information intervention to specific neural targets in the pigeon's brain.This review summarizes research progress in pigeon robots based on the sensory system,motivation and emotional system or cortex and midbrain motor area respectively,according to the distribution of hierarchical multi-level neural regulatory targets in the pigeon's brain,with the aim of providing reference and guidance for further applied research into the use of pigeon robots in space perception,reconnaissance,and anti-terrorism search and rescue.