Spore suspension of Streptomyce s griseus AS 818 (10 6/mL)was radiated b y Co 60 -radiation,the radiation dosage was 1?10 4rad.And 5 streptomy cin resis tant mutants (above 50?g/mL) were screened,then the resistant level of mutant RL-4 was induced to 100?g/mL.The number of RL-4 colonizing on soybean roots pl anted on 1% Water agar or in sterile soil was determined.The results showed tha t it could colonize on soybean rhizosphere and rhizoplane for a short period,bu t there is a little difference.When it was examined in 1% Water agar,the numb er of RL-4 raised gradually in soybean rhizoplane in 4 weeks.But when examined in sterile soil,RL-4 reduced about 100 times at the 1 st week,then raised gradually and reached the highest point at the 3 rd week,and decreased aga in at the 4 th week,In the rhizoplane,it reduced gradually from the 1 st week,and couldn't be examined at the 4 th week. Mutant RL-4 couldn't be found in soybean endorhizosphere by tissue printing.

OBJECTIVE: To study the role of autophagy in the development of systemic juvenile idiopathic arthritis (sJIA) by analyzing the expression of microtubule-associated protein 1 light chain 3-II (LC3-II), myeloid differentiation factor 88 (MyD88), and suppressor of T-cell receptor signaling 1 (STS-1) in peripheral blood lymphocytes of children with sJIA. METHODS: A total of 26 children with sJIA were enrolled as the sJIA group, and 26 healthy children were enrolled as the control group. Western blot was used to measure the protein expression of LC3-II, STS-1, and MyD88 in peripheral blood lymphocytes. Immunofluorescence assay was used to measure the expression of LC3-II in the cytoplasm of lymphocytes. Pearson correlation analysis was used to assess the correlation between indices. RESULTS: Compared with the control group, the sJIA group had significant increases in the expression of LC3-II, STS-1, and MyD88 (P<0.05). In the sJIA group, the expression of LC3-II was positively correlated with that of MyD88 (r=0.478, P<0.05), and the expression of STS-1 was also positively correlated with that of MyD88 (r=0.817, P<0.05). CONCLUSIONS There is high expression of LC3-II in peripheral blood lymphocytes of children with sJIA, suggesting that the development of sJIA may be associated with excessive expression of autophagy. STS-1 may induce autophagy by activating some signaling pathways, and MyD88 may participate in autophagy through the Toll-like receptor signaling pathway.
Arthritis, Juvenile ; Autophagy ; Child ; Humans

OBJECTIVETo investigate the outcomes following the tumor resection of oral cavity and maxillofacial and reconstruction with free anterolateral thigh flaps (ALT).

METHODSThirty one patients underwent ALT reconstruction following the tumor resection from Dec. 2004 to Dec. 2005. Among them, 17 cases were squamous cell carcinoma (SCC) of tongue, 6 cases of buccal SCC and 8 other malignant. The size of the ALT flaps ranged from 4 to 8 cm in width and 6 to 23 cm in length. Tracheotomy were performed for 4 cases intraoperatively.

RESULTSThe overall successful rate was 96.8%. Thirty cases survival no cancer, 1 case died of recurrent and no-controlled of lymph-node in 8 months after operation. Postoperative vessel thrombosis occurred in 3 flaps between 12 hours to 4 days after operation. Two of them were saved. The necrosis area of the third flap was 25%.

CONCLUSIONSThe ALT was benefit to repair the defects of oral cavity and maxillofacial, and the donor place was more easily hidden and didn't not influence the outlook and function; the important normal functional framing such as teeth and bone should be preserved; the pedicle of vessel could't be twisted during the procedure of reconstruction to avoid vein oppressed; the size of flap should be suitable to defects in order to avoid flaps being crowd and blood clot; tracheotomy was safe while repairing the defect of hard and soft palate. Reconstructive surgical procedures;

Adult ; Aged ; Carcinoma, Squamous Cell ; surgery ; Female ; Humans ; Male ; Middle Aged ; Mouth ; surgery ; Mouth Neoplasms ; surgery ; Reconstructive Surgical Procedures ; methods ; Skin Transplantation ; Surgical Flaps ; Thigh ; surgery

Objective To investigate the diagnosis and treatments of thyroid goiters invading mediastinum and thoracic cavity. Methods Seventy-eight cases of thyroid goiters invading mediastinum and thoracic cavity and undergoing surgery from 1995 to 2005 were reviewed. There were 22 males and 56 females and their age ranged from 45 years to 78 years with a median age of 59 years. According to the classification of intrathoracic thyroid goiters, there were 50 cases in Class Ⅰ , 20 cases in Class Ⅱ and 8 cases in Class Ⅲ. In these patients,38 cases suffered from dyspnea at degree [ and 20 cases at degree Ⅱ.Of the patients, 71 underwent thyroidectomy through neck approach and 7 underwent thyroidectomy by a combined approach of neck incision plus stemotomy or lateral thoracotomy. Tracheal defects in 4 cases and esophageal defects in 3 cases were repaired. Postoperative residual diseases were found in tracheoesophageal wall(5 cases) and mediastinum (6 cases). Eleven patients received postoperative radiotherapy and 18 underwent 131 Ⅰ treatment. No case died of operation and no case with wound infection. Results The time of follow-up was 60 - 180 months with a median of 110 months. Three patients lost follow-up. Dyspnea in 58 cases were improved after operation. Three of 49 patients with nodular goiters died from cardiocerebrovascular diseases. Of 29 patients with thyroid papillary carcinoma, 2 died from lung metastasis and 3 died from neck relapse. Five-year survival rate was 75.0% in the patients with thyroid cancer.Conclusions Most of thyroid goiters invading mediastinum and thoracic cavity can be completely resected via neck approach, but a combined approach of neck incision plus stemotomy or lateral thoracotomy may be used in some cases with malignant goiters to dissect the diseases completely. Postoperative external beam radiotherapy are required for the residual diseases. 131Ⅰ may be considered in high-risk differentiated thyroid carcinoma cases.

Objective To investigate the surgical managements for residual or recurrent diseases in the neck after radiotherapy in nasopharyngeal carcinoma. Methods Seventy-eight cases of neck masses (39 cases for unilateral residual diseases,9 for bilateral residual diseases and 30 for reccurent diseases)after radiotherapy in nasopharyngeal carcinoma who were treated surgically between January 1990 and December 2005 were retrospectively analyzed.There were 56 males and 22 females.Their ages ranged from 28 to 65 years( median 41 years).There were 27 patients with skin involvement. After preoperative imaging assessment,17 patients whose common carotid arteries or internal carotid arteries were difficult to separate routinely attained the carotid balloon occlusion test which confirmed that 15 cases of cerebral arterial circle open to compensation,however,two cases of poor compensation.Surgical procedures included expanded neck mass resection (21 cases),unilateral radical neck dissection (49 cases)and bilateral radical neck dissection(8 cases).Of them 5 patients were with unilateral internal carotid artery resection.Neck defects were repaired with pectoralis major muscle flaps (15 cases),free anterolateral femoral skin flaps (9 cases)and trapezius muscle flaps(3 cases).Of the 78 patients,13 with microscopic positive diseases and 2 with residual diseases in internal carotid artery walls underwent postoperative radiotherapy,with the doses of 45 to 50 Gy.Results All patients were closely followed-up more than 5 years.Three- and five-year survival rates were 46.2％ and 28.3％ respectively.Neck defects were successfully repaired with skin flaps immediately after resecting diseases in 27 cases,only one patient with delayed healing.Of 51 patients without skin flap repair,neck wounds healed successfully in 45 patients and with delayed healing in 6 patients.Pathological positive rates of lymph nodes located in the level Ⅰ,Ⅰ,Ⅲ,Ⅳ and Ⅴ were 10.5％,61.4％,10.5％,1.8％ and 28.1％ respectively.Conclusions Preoperative balloon occlusion test is required to assess the function of Willis'ring before determining ligation or resection of internal carotid artery.Residual or recurrent diseases commonly exist in level Ⅱ,Ⅴ A and Ⅲ,which should be included in neck dissection.Pectoralis major muscle flap and free anterolateral femoral skin flap are recommended for the repair of neck defect.

OBJECTIVES: To improve the understanding of the clinical phenotypes and genetic characteristics of nephronophthisis (NPHP) and related syndromes in children. METHODS: A retrospective analysis was performed on the medical data of eight children with NPHP and related syndromes who were diagnosed and treated in the Department of Pediatrics of the Second Hospital of Hebei Medical University, from January 2018 to November 2022. The clinical characteristics and genetic testing results were analyzed. RESULTS: Among these eight children, there were five boys and three girls, with an age of onset ranging from 15 months to 12 years. All 8 children exhibited different degrees of renal function abnormalities when they attended the hospital. Among the eight children, two had the initial symptom of delayed development, two had the initial symptom of anemia, and two were found to have abnormal renal function during physical examination. The extrarenal manifestations included cardiovascular abnormalities in two children, skeletal dysplasia in two children, liver dysfunction in one child, retinitis pigmentosa in one child, and visceral translocation in one child. All eight children had renal structural changes on ultrasound, and four children had mild to moderate proteinuria based on routine urine test. Of all eight children, five had NPHP1 gene mutations and one each had a gene mutation in the NPHP3, IFT140, and TTC21B genes, and four new mutation sites were discovered. CONCLUSIONS Children with NPHP and related syndromes often have the initial symptom of delayed development or anemia, and some children also have extrarenal manifestations. NPHP and related syndromes should be considered for children with unexplained renal dysfunction, and high-throughput sequencing may help to make a confirmed diagnosis.
Child ; Humans ; Retrospective Studies ; Syndrome ; Kidney Diseases, Cystic/genetics* ; Mutation ; Phenotype

To investigate the effect of turmeric volatile oil (TVO) on the apoptosis and proliferation of human skin SCC A431 cells, A431 cells were incubated with different concentrations (5-80 mg•L⁻¹) of TVO in vitro．The proliferation and cell cycle were assessed by CCK8 assay. The change of morphology was observed with inverted microscope. Apoptosis was evaluated with AO/EB double staining and flow cytometry (FCM); cell cycle was analyzed with FCM ．Western blot method was used to detect caspase-3 and caspase-9 protein expression. Results indicated that TVO has significant inhibitory effects on the growth of A431 cells in a dose dependent relationship, the difference between groups has statistically significant (P<0.05). TVO group compared with control group, concentrations in cells shrivel and broken phenomenon, cell apoptosis rate increased, and a dose dependent and increased the expression of caspase-3 and caspase-9. The experiment results suggested that TVO could restrain skin squamous carcinoma A431 cells proliferation, and induce its apoptosis. The mechanism may be related to increase the expression of caspase-3 and caspase-9.