Interferons are potent cytokines with antiviral activity that have been founded earliest. Different types of interferons have similar bioactivity, Such as anti-viruses activity, anti-tumor activity and immune modulation. They are induced by virus infection and trigger the host defense by different mechanisms. Firstly, IFNs directly induce the expression of effector proteins with antiviral activity, thus establishing a first line of defense. Secondly, they help to shape adaptive immunity, leading to long-lasting protection. Due to the key position of IFNs in antiviral defense, viruses have evolved effective countermeasures in order to successfully invade the host. By expressing so-called IFN antagonists, viruses interfere with either IFN induction, IFN signaling, or the action of IFN effector proteins.

Coloring Agents ; Frozen Sections ; methods ; Humans ; Neoplasms ; pathology ; Staining and Labeling ; methods

Objective To evaluate the etiologies of children with gastrointestinal bleeding(GIB), and the relationship between the pathological findings and clinical.Methods Gastroscopy or proctoscope was performed in 153 children with GIB. Pathological studies and tests as for helicobactor pylori (Hp) were undertaken.Results Among 153 children,140 cases(91.5 %) had definite diagnosis,including 74 children with upper gastrointestinal bleeding(UGIB) and 66 cases with lower gastrointestinal bleeding(LGIB). Gastric pathologic study was conducted in 56 cases. All patients had chronic superficial gastritis(CSFG). Hp test was positive in 33 patients. There was significant difference in the positive rate of Hp test between patients with gastritis or duodenitis and those with ulcers (P

Objective To investigate the expression of VIT-1 gene in melanocytes of patients with vitiligo, and to analyze the difference of its sequence. Methods The skin from the foreskins of healthy men by circumcision and from the non-lesional area on the buttocks of 5 patients were digested by dispase, then the epidermis and dermis were separated, and the melanocytes were isolated. Then we cultured the melanocytes from the controls in TICVA medium and those from the patients in TICVA medium supplemented with basic fibroblast growth factor (bFGF) and endothelin-1 ( ET-1). The expression of VIT-1 gene was measured by RT-PCR, the full-length cDNA of VIT-1 ORF was cloned and sequenced, and sequence difference was analyzed by CLUSTAL W ( 1.83 ) software. Results The expression levels of VIT-1 gene were significantly lower in melanocytes from the patients than in those from the controls. An 81 bp-intron was found in the VIT-1 ORF. VIT-1 was a fragment of FBXO11, located at its 3' end. Conclusion VIT-1 gene is not a new gene, but a fragment of FBXO11, and a member of F-box protein family.

Biomarkers ; blood ; Dimethylformamide ; pharmacokinetics ; Humans ; Occupational Exposure

Hemangiopericytoma ; pathology ; Humans ; Paranasal Sinus Neoplasms ; pathology

BACKGROUNDThe purpose of this study was to evaluate the efficacy of topical melagenine for repigmentation in child patients with vitiligo on the scalp.

METHODSTwenty-two child patients with vitiligo on the scalp were treated with 1.2 mg/ml aqueous melagenine in combination with 20 minutes of infrared exposure twice daily.

RESULTSIn 4 patients (18.2%), melagenine treatment in combination with infrared exposure led to complete recovery; in 6 patients (27.3%), treatment was shown to be effective; in 8 patients (36.3%), treatment led to improvements in patient condition; and only 4 patients (18.2%) showed no response after 1 - 2 treatment sessions. The general effective rate of melagenine-infrared combination treatment was 45.5% for the children with vitiligo on the scalp, and treatment was accompanied by minimal side effects.

CONCLUSIONMelagenine may be efficacious and a safe treatment option for childhood vitiligo affecting the scalp.

Administration, Topical ; Adolescent ; Child ; Child, Preschool ; Female ; Humans ; Infrared Rays ; therapeutic use ; Lipoproteins ; administration & dosage ; Male ; Scalp Dermatoses ; drug therapy ; Vitiligo ; drug therapy

Hemangioblastoma ; pathology ; Humans ; Kidney ; pathology ; Kidney Neoplasms ; pathology