Interferon-γ-induced GBP1 is an inhibitor of human papillomavirus 18.

BACKGROUND: Human papillomavirus (HPV) infection is an important factor leading to cervical cell abnormalities. 90% of cervical cancers are closely associated with persistent infection of high-risk HPV, with the highest correlation with HPV16 and 18. Currently available vaccines and antivirals have limited effectiveness and coverage. Guanylate binding protein 1 (GBP1) was induced by interferon gamma and involved in many important cellular processes such as clearance of various microbial pathogens. However, whether GBP1 can inhibit human papillomavirus infection is unclear. RESULTS: In this study, we found that GBP1 can effectively degrade HPV18 E6, possibly through its GTPase activity or other pathways, and E6 protein degrades GBP1 through the ubiquitin-proteasome pathway to achieve immune escape. CONCLUSION: Therefore, GBP1 is an effector of IFN-γ anti-HPV activity. Our findings provided new insights into the treatment of HPV 18 infections.

Controlled Encapsulation of Gold Nanoparticles into Zr-Metal-Organic Frameworks with Improved Detection Limitation of Volatile Organic Compounds via Surface-Enhanced Raman Scattering.

Volatile organic compounds (VOCs) have harmful effects on human health and the environment but detecting low levels of VOCs is challenging due to a lack of reliable biomarkers. However, incorporating gold nanoparticles (Au NPs) into metal-organic frameworks (MOFs) shows promise for VOC detection. In this study, we developed nanoscale Au@UiO-66 that exhibited surface-enhanced Raman scattering (SERS) activity even at very low levels of toluene vapors (down to 1.0 ppm) due to the thickness of the shell and strong π-π interactions between benzenyl-type linkers and toluene. The UiO-66 shell also increased the thermal stability of the Au NPs, preventing aggregation up to 550 °C. This development may be useful for sensitive detection of VOCs for environmental protection purposes.

[Crypotanshione reduces the expression of metadherin in DU145 prostate cancer cells].

OBJECTIVE: To investigate the effects of crypotanshinone (CPT) on the proliferation and apoptosis of DU145 prostate cancer cells as well as on the metadherin expression and the downstream PI3K/AKT signaling pathway in the DU145 cells. METHODS: We treated DU145 prostate cancer cells with different concentrations of CPT for 24, 48, and 72 hours followed by evaluation of the proliferation and apoptosis of the cells by MTT assay and TUNEL, respectively. We determined the expressions of metadherin protein and mRNA in the DU145 cells by Western blot and RT-PCR respectively at different time points after CPT treatment. We also detected the expressions of the proteins metadherin, AKT, p-AKT, and Bcl-2 in the CPT-treated DU145 cells at 48 hours. RESULTS: CPT significantly inhibited the proliferation of the DU145 cells in a dose- and time-dependent manner (P < 0.05). After treatment with 10 µmol/L CPT for 24, 48, and 72 hours, the apoptosis rates of the DU145 cells were (29.42 ± 4.51), (55.07 ± 5.67) and (70.84 ± 4.66)%, respectively, significantly higher than (3.1 ± 2.48)% in the control group (P < 0.05). The expression of metadherin was remarkably downregulated at the transcription and translation levels (P < 0.05) and the expressions of the AKT signaling pathway and the Bcl-2 protein were markedly inhibited in the DU145 cells after treated with 10 µmol/L CPT for 48 hours (P < 0.05). CONCLUSION: CPT can inhibit the proliferation and induce the apoptosis of DU145 prostate cancer cells, which may be associated with its suppression of the downstream PI3K/AKT signaling pathway by reducing the expression of metadherin in the DU145 cells.

MTDH/AEG-1-based DNA vaccine suppresses metastasis and enhances chemosensitivity to paclitaxel in pelvic lymph node metastasis.

OBJECTIVE: MTDH/AEG-1 could act as an oncogene by regulating cellular transformation, proliferation, invasion, metastasis, and angiogenesis. This study aims to explore the mechanism by which MTDH/AEG-1 inhibits cancer growth and metastasis and enhances chemosensitivity. METHODS: Mouse model was established using orally immunized mice exposed to attenuated Salmonella containing vectors carrying full length MTDH/AEG-1 gene, and we were able to enhance the immune response and inhibit the growth and metastasis of prostate cancer through activation of cellular and humoral immunities and induction of CD8+ T cells. Immunohistochemistry and TUNEL assay, CD4+ and CD8+ T cell analysis by flow cytometry, HE staining, RT-PCR analysis, Western-blot analysis and quantitative polymerase chain reaction were performed. RESULTS: The MTDH/AEG-1 gene vaccine induced the anti-tumor function of cytotoxic T lymphocytes and CD8+ T cells and inhibited tumor growth and metastasis of prostate cancer. In the therapy model, the MTDH/AEG-1 gene vaccine significantly enhanced chemosensitivity to paclitaxel, inhibited tumor growth, promoted tumor cell apoptosis, and prolonged the survival time of tumor-bearing mice without any apparent side effects. CONCLUSIONS: Our results demonstrated that MTDH/AEG-1-based DNA vaccines could used for the treatment of prostate cancer in terms of the inhibition of tumor growth, the lifespan of tumor-bearing animals. Combined with chemotherapy, MTDH/AEG-1-based DNA vaccines may produce highly favorable outcomes in the prevention and treatment of prostate cancer, suggesting the immune efficacy of MTDH/AEG-1-based DNA should be further analyzed in other cancers.

[Hypothermia combined with dexamethasone reduces ICAM1 expression and protects spermatogenesis after testicular torsion-detorsion].

OBJECTIVE: To investigate the protective effect of hypothermia combined with dexamethasone on spermatogenesis and the expression of intercellular adhesion molecule 1 (ICAM1) after testicular torsion-detorsion. METHODS: We made unilateral testicular torsion models in 100 pubertal male Sprague-Dawley rats by 720 degree torsion of the left testis and then randomly divided them into four groups of equal number to be treated with normal temperature + physiological saline (group A), hypothermia + physiological saline (group B), normal temperature + dexamethasone (group C), and hypothermia + dexamethasone (group D). After 48 hours, we collected the testes, observed pathological changes of the testicular tissue by HE staining under the light microscope, detected the apoptosis of spermatogenic cells by TUNEL, and determined the expression of ICAM1 by Western blot. RESULTS: HE staining showed different degrees of testicular tissue injury in the four groups of rats, most obvious in group A, but mild in the other three. The ICAM1 protein expression was significantly higher in group A (0.68 +/-0. 03) than in B (0. 49 +/- 0. 06, P <0. 05) , C (0. 46 +/- 0. 09, P < 0.05) , and D (0.17 +/- 0.08, P <0.01). The nuclei were deep brown or brown. Lots of apoptotic spermatogenic cells were seen in the torsion testis of group A, with a significantly higher apoptosis index ( [33. 13 +/- 3.21 ]%) than in B ( [ 17. 12 +/-5.23 ]%, P < 0.05), C ([14.13 +/- 2.03]%, P <0.05), and D ([9.05 +/- 1.03]%, P <0.01). CONCLUSION: Hypothermia combined with dexamethasone can protect the testis from injury as well as the reproductive function of the testis after testicular torsion-detorsion and reduce the expression of ICAM1.

[Effects of hypothermia plus dexamethasone on eNOS expression and spermatogenic cell apoptosis after testicular torsion reduction].

OBJECTIVE: To investigate the protective effects of hypothermia combined with dexamethasone on the testis of rats after testicular torsion reduction and on the expression of eNOS and apoptosis of spermatogenic cells. METHODS: We made unilateral testicular torsion models in 80 adolescent male Sprague-Dawley rats by 720 degrees torsion of the left testis, and then randomly divided them into four groups of equal number to be treated with normal temperature + physiological saline (group A), hypothermia + physiological saline (group B), hypothermia + dexamethasone (group C), and normal temperature + dexamethasone (group D). After 48 hours, we collected the testes, observed pathological changes of the testicular tissue by HE staining under the light microscope, determined the expression of eNOS by immunohistochemistry, and detected the apoptosis of spermatogenic cells by TUNEL. RESULTS: HE staining showed different degrees of testicular tissue injury in all the four groups of rats, most obvious in group A, while protective effect was observed in the other three groups. Immunohistochemistry revealed significantly more positive cells and higher positive staining intensity in the torsion (left) testis in group A than in B (P < 0.05), C (P < 0.01) and D (P < 0.01). The nuclei were deep brown or brown. Lots of apoptotic spermatogenic cells were seen in the torsion testis of group A, with a significantly higher apoptosis index (31.12 +/- 4.68) than in B (16.58 +/- 6.22) (P < 0.05), C (8.60 +/- 1.15) (P < 0.01) and D (13.52 +/- 3.06) (P < 0.01). CONCLUSION: Ischemia-reperfusion injury after testicular torsion reduction can increase the apoptosis of spermatogenic cells and decrease testicular reproductivity. Hypothermia combined with dexamethasone can protect the testis from injury as well as the reproductive function of the testis after testicular torsion reduction.

[Study on the distribution of Chinese medical constitutions of hypertension complicated diabetes patients].

OBJECTIVE: To investigate the distribution features of Chinese medical constitutions in hypertension complicated diabetes patients. METHODS: Recruited were 251 primary hypertension inpatients at the Department of Neurology and the Department of Cardiology, Mindong Hospital of Ningde City from October 2010 to March 2011. They were assigned to two groups according to whether they were complicated with diabetes, i.e., the primary hypertension complicated diabetes (as the case group, 78 cases) and the primary hypertension without complicated diabetes (as the control group, 173 cases). The constitution types were investigated by questionnaire. The constitution type distribution was compared between the two groups. The data including gender, age, and the distribution of the constitution type were compared between the two groups. The levels of TG, TC, LDL-C, Hb, FPG, and ALB were detected on the 2nd day after admission. The levels of TG, TC, LDL-C, Hb, and ALB were compared be- tween the two groups in patients of yin deficiency constitution, phlegm dampness constitution, and qi deficiency constitution. RESULTS: There was no statistical difference in the hypertension grading, the disease course, and chronic disease complications between the two groups (P > 0.05). The main constitution types were yin deficiency (accounting for 26.0%), phlegm dampness (accounting for 19.1%), and qi deficiency (accounting for 19.1%) in the control group. The main constitution types were yin deficiency (accounting for 32.1%), phlegm dampness (accounting for 30.8%), and qi deficiency (accounting for 17.9%) in the case group. The ratio of phlegm dampness type in the case group was higher than that in the control group with statistical difference (P = 0.041). There was no statistical difference in the constitution distribution in the same gender between the two groups (P > 0.05). There was no statistical difference in the constitution distribution in those younger than 80 years between the two groups (P > 0.05). Compared with those older than 80 years in the control group, the ratio of phlegm dampness was higher, and the ratios of yang deficiency, yin deficiency, qi deficiency, and dampness heat were lower in the case group with statistical difference (P = 0.020). There was no statistical difference in the constitution distribution among different age stages in the case group (P > 0. 05). But there was statistical difference in the constitution distribution among different age stages in the control group (P < 0.05). The yin deficiency and qi deficiency constitutions were dominated in thinner patients of the control group, while yin deficiency constitution was dominated in thinner patients of the case group, showing no statistical difference between the two groups (P > 0.05). There was no statistical difference in the distribution of constitution type in overweight patients between the two groups (P = 0.458). Compared with those of gentle type constitution in the same group, the levels of TC and LDL-C increased in those of phlegm dampness constitution in the two groups (P < 0.05). The level of TC increased in those of qi deficiency constitution in the case group. The level of Hb decreased in those of qi deficiency constitution in the control group (P < 0.05). Compared with those of qi deficiency constitution in the same group, the levels of TC and Hb obviously increased in those of phlegm dampness constitution in the control group (P < 0.05). The level of ALB increased in those of yin deficiency constitution in the case group (P < 0. 05). Compared with the control group, the level of FPG of those of each constitution increased in the case group (P < 0.05) ,.and the level of TC increased in those of qi deficiency constitution (P = 0.007). CONCLUSIONS: The main constitution types of hypertension complicated diabetes patients were yin deficiency, phlegm dampness, and qi deficiency. The ratio of phlegm dampness was higher in hypertension complicated diabetes patients than hypertension without complicated diabetes patients. The levels of TC and LDL-C were higher in those of phlegm dampness constitution type. The level of TC was higher in hypertension complicated diabetes patients of qi deficiency constitution.