Omega-6 polyunsaturated fatty acid promotes colon carcinogenesis / 中华胃肠外科杂志

<p><b>OBJECTIVE</b>To investigate whether ω-6 polyunsaturated fatty acid promotes colon carcinogenesis through downregulation of P53-dependent growth inhibition.</p><p><b>METHODS</b>Colon carcinogenesis was induced by injection of azoxymethane (AOM) intraperitoneally. Experimental animals were randomly divided into four groups, receiving regular diet and intraperitoneal injection of normal saline(control group), high ω-6 polyunsaturated fatty acid diet with intraperitoneal injection of normal saline(Corn oil group), regular diet with intraperitoneal injection of AOM(AOM group), or high ω-6 polyunsaturated fatty acid diet with intraperitoneal injection of AOM (Corn oil+AOM group). Aberrant crypt focis (ACFs) were observed after methylene blue staining and enumerated. Colonic mucosa PCNA and P53 expressions were assessed by RT-PCR and Western blotting, and location of P53 in the colon crypt focis was determined by immunohistochemical staining.</p><p><b>RESULTS</b>Amounts of ACFs was 1.2±0.3 in the control group, 1.3±0.4 in the Corn oil group, 41.0±4.8 in the AOM group, and 73.3±9.9 in the Corn oil+AOM group, the differences were statistically significant(P<0.05). The expression of P53 in normal crypt focis was higher than that in ACFs. High ω-6 polyunsaturated fatty acid dietary significantly promoted AOM-induced colon PCNA expression, and enhanced AOM-mediated P53 inhibition in colon mucosa.</p><p><b>CONCLUSION</b>High ω-6 polyunsaturated fatty acid diet can enhance AOM-induced inhibition of P53 in colon mucosa, resulting in overexpression of PCNA, formation of ACF, and carcinogenesis in the colon.</p>

Application of reversed pedicled submental island flap / 中华耳鼻咽喉头颈外科杂志

<p><b>OBJECTIVE</b>To explore the clinical applications of reversed pedicled submental island flap in the face and oropharynx.</p><p><b>METHODS</b>The clinical data of ten cases of reconstruction of defect in the area of face or oropharynx following resection of tumors with reversed pedicled submental island flaps between January of 2004 to December of 2006 were retrospectively studied. The cases included six males and four females, aged from 24 to 76 (median 55 years). One of the cases suffered from upper lid melanoma, two hard palate myoepithelioma, one maxillary ameloblastoma, four tonsil cancer and two lingual carcinoma. The submental island flaps were dissected according to the area of the defection, the distal facial vessel was used as the pedicle of the flaps, and the flaps were transferred through under the skin of the face or the mandible to the area of the defection. Radical neck dissection was performed in the four tonsil cancers and two lingual carcinomas simultaneously.</p><p><b>RESULTS</b>All the flaps showed pale, edema and/or congestion after the surgical treatment, but swelling and congestion disappeared gradually 5 days later. One of the cases suffered from severe congestion of the flap, but the flap survived by stabbing with needle and draining. The flap of another case separated from the hard palate was sutured again, and healed. Lower lip palsy occurred in another case, and recovered 3 months later by conservative therapy. None of the flaps necrosed.</p><p><b>CONCLUSIONS</b>Because of the upper pedicle, reversed pedicled submental island flap can be transferred to a long distance to reconstruct the defect in the upper face or around the orbit, and radical neck dissection can be performed simultaneously, it is a reasonable candidate in repairing the defect of the face and oropharynx.</p>

Study of the changes of acrosomal enzyme and nitric oxide synthase, superoxide dismutase of infertile patients with positive antisperm antibody in seminal plasma / 中华男科学杂志

<p><b>OBJECTIVE</b>To study the impacts of positive antisperm antibody (AsAb) in seminal plasma on acrosomal enzyme activity, nitric oxide synthase (NOS) and superoxide dismutase (SOD) levels of spermatozoa.</p><p><b>METHODS</b>Swatch from 40 infertile patients with positive AsAb in seminal plasma as experimental group, and 40 fertile men as control group. Acrosomal enzyme activity was detected by the BAEE/ADH unitive method, NOS was detected by the redoxreaction assay, and SOD level was measured xanthine oxidase method.</p><p><b>RESULTS</b>Compared with control group, acrosomal enzyme activity of spermatozoa of experimental group was significantly decreased (P <0.01), NOS activity was apparently increased (P < 0.01), and SOD level in seminal plasma was markedly decreased (P<0.01).</p><p><b>CONCLUSION</b>It may be possible that the positive AsAb in seminal plasma beget infertility through the changes of acrosomal enzyme of spermatozoa, SOD and NOS activities in seminal plasma.</p>

Cloning and purification of paired immunoglobin-like type 2 receptor beta and preparation of its polyclonal antibody / 第二军医大学学报

Objective: To express and purify paired immunoglobin-like type 2 receptor beta (PILRβ) and prepare the polyclonal antibody against its protein. Methods: The PILRβ cDNA was amplified from the total RNAs extracted from human peripheral blood cells by RT-PCR and was cloned into pET-32a vector. The vector harboring PILRβ gene was then expressed in E. coli by IPTG induction and the product was purified by Ni2+-NTA affinity chromatography. Polyclonal antibody was prepared by immunizing rabbits with the purified protein. The titer and specificity of the antibody were examined by ELISA and Western blot, respectively. Results: Highly purified PILRβ protein (Mr 42 000) was obtained. The prepared polyclonal antibody was highly specific and had a titer of 1:10 000. Conclusion: PILRβ gene is successfully cloned and the purified PILRβ protein is expressed. Polyclonal antibody against PILRβ(with high titer and specificity) is successfully obtained, which provides a basis for further study on PILRβ.

Borders of left gastric lymph node area in 124 patients with esophageal and gastric cardia carcinoma / 中华放射肿瘤学杂志

Objective To measure and define the distribution of left gastric lymph nodes.Meth- ods From Jan.2004 to Apr.2005,silver clips were set around the root of the left gastric artery in 124 pa- tients with esophageal and gastric cardia carcinoma,X-ray films at 0?and 90?simulator gantry in the radio- therapeutic position were taken.Then,the data of the superior,lower,left,right,anterior and posterior bor- der in each patient was recorded.With SAS 8.02 software,data of minimum area which covered the left gas- tric lymph node in different incidences were obtained.Results According to the analysis of Shapiro- Wilk,Kolmogorov-Smimov,Cramer-von Mises and Anderson-Darling tests,each border was of normal distri- bution,with equal frequency in the male and female,despite the actual results in different genders.Pearson Correlation Coefficients analysis did not suggest a significant relationship between the border and height, weight and size of vertebrae,which formed the minimum area covering the left gastric area at frequency of 100%,95%,90% and 85%,which were drawn out through the calculation.Conclusions Aiming at completely identifying the normal distribution of the left gastric lymph node,more patients are required to be in the pool.For the time being,location in the left gastric area can be obtained from details of the results in the present study.