Tri-enzyme fusion of tryptophan halogenase achieves a concise strategy for coenzyme self-sufficiency and the continuous halogenation of L-tryptophan.

The halogenase-based catalysis is one of the most environmentally friendly methods for the synthesis of halogenated products, among which flavin-dependent halogenases (FDHs) have attracted great interest as one of the most promising biocatalysts due to the remarkable site-selectivity and wide substrate range. However, the complexity of constructing the NAD+-NADH-FAD-FADH2 bicoenzyme cycle system has affected the engineering applications of FDHs. In this work, a coenzyme self-sufficient tri-enzyme fusion was constructed and successfully applied to the continuous halogenation of L-tryptophan. SpFDH was firstly identified derived from Streptomyces pratensis, a highly selective halogenase capable of generating 6-chloro-tryptophan from tryptophan. Then, using gene fusion technology, SpFDH was fused with glucose dehydrogenase (GDH) and flavin reductase (FR) to form a tri-enzyme fusion, which increased the yield by 1.46-fold and making the coenzymes self-sufficient. For more efficient halogenation of L-tryptophan, a continuous halogenation bioprocess of L-tryptophan was developed by immobilizing the tri-enzyme fusion and attaching it to a continuous catalytic device, which resulted in a reaction yield of 97.6% after 12 h reaction. An FDH from S. pratensis was successfully applied in the halogenation and our study provides a concise strategy for the preparation of halogenated tryptophan mediated by multienzyme cascade catalysis.

circPRRC2A promotes angiogenesis and metastasis through epithelial-mesenchymal transition and upregulates TRPM3 in renal cell carcinoma.

Background: Circular RNAs (circRNAs) have been identified as essential regulators in a plethora of cancers. Nonetheless, the mechanistic functions of circRNAs in Renal Cell Carcinoma (RCC) remain largely unknown. Methods: In this study, we aimed to identify novel circRNAs that regulate RCC epithelial-mesenchymal transition (EMT), and to subsequently determine their regulatory mechanisms and clinical significance. Results: circPRRC2A was identified by circRNA microarray and validated by qRT-PCR. The role of circPRRC2A in RCC metastasis was evaluated both in vitro and in vivo. We found that increased expression of circPRRC2A is positively associated with advanced clinical stage and worse survivorship in RCC patients. Mechanistically, our results indicate that circPRRC2A prevents the degradation of TRPM3, a tissue-specific oncogene, mRNA by sponging miR-514a-5p and miR-6776-5p. Moreover, circPRRC2A promotes tumor EMT and aggressiveness in patients with RCC. Conclusions: These findings infer the exciting possibility that circPRRC2A may be exploited as a therapeutic and prognostic target for RCC patients.

Decreased expression of BRAF-activated long non-coding RNA is associated with the proliferation of clear cell renal cell carcinoma.

BACKGROUND: BRAF-activated long non-coding RNA (BANCR) has been associated with various types of cancer. Nevertheless, the role of BANCR in clear cell renal cell carcinoma (ccRCC) is still not fully understood. This study aims to investigate the relationship between ccRCC and BANCR. METHODS: Expression of BANCR in TCGA renal cancer data sets was analyzed. The expression pattern of BANCR in Immortalized normal human proximal tubule epithelial cell line HK-2 and ccRCC cell lines (ACHN, CAKI-1, A498 and 786-O) was detected by real-time quantitative RT-PCR (qRT-PCR). ccRCC tissues with adjacent normal renal tissues diagnosed by pathological methods from 62 patients were used to detect the expression of BANCR, and its correlation with prognosis of ccRCC patients was assessed by Kaplan-Meier method. The LV-BANCR vector was used to examine the influence of BANCR on the proliferation, migration, invasion, apoptosis and cell cycle distribution of ccRCC cells in vitro. RESULTS: BANCR was downregulated in renal cancer according to TCGA data sets. Compared with adjacent normal renal tissues and normal human proximal tubule epithelial cell line HK-2, BANCR expression was significantly decreased in ccRCC tissues and ccRCC cell lines, and its low expression was associated with poor prognosis. Moreover, in the condition of BANCR overexpression by LV-BANCR vector, the proliferation, migration, invasion capacity of ccRCC cells was inhibited, while the apoptosis was increased and the G1 cell cycle arrest was induced in vitro. CONCLUSIONS: BANCR is downregulated in ccRCC tissues and cell lines, and is associated with ccRCC progression. Thus, BANCR may represent a novel prognostic biomarker and a potential therapeutic target for ccRCC patients.

A new cinnamic acid glycoside from roots of Heracleum dissectum.

From the roots of Heracleum dissectum Lebb., one new cinnamic acid glycoside derivative named dissectumoside (1), together with eight known compounds including three phenolics, three phenolic glycosides and two phenylpropanoic glycoside were isolated using various chromatographic methods. Among them compound 2-9 was isolated from the plant for the first time. Their structures were elucidated and identified on the basis of their physicochemical properties and by extensive analyses of NMR spectroscopy and high-resolution mass spectrometry. The results of triglyceride accumulation screening in 3T3-L1 cells showed that compounds 1, 5 and 9 exhibited significantly accelerating activities of adipogenesis in adipocytes.

Retrospective analysis of fosfomycin combinational therapy for sepsis caused by carbapenem-resistant Klebsiella pneumoniae.

The aim of the present study was to compare the efficacy and safety of fosfomycin combinational therapy with other antibiotics for the treatment of infections caused by carbapenem-resistant Klebsiella pneumoniae (CRKP). This retrospective cohort study examined 104 cases of sepsis caused by CRKP occurring between January 2012 and November 2014 in Shanghai Tenth People's Hospital. Three categories of patient outcome were assessed: Survival/mortality, duration of intensive care unit stays and duration of medical ventilation. Univariate ordinal analyses were adopted to evaluate the correlations between outcome and treatment. A total of 104 patients with physician-diagnosed CRKP were involved in the study. The overall mortality rate was 25.0%. The majority of the infections (84; 80.8%) were hospital acquired. Critical infections received more than one active antibiotic as therapy. Patients treated with fosfomycin combinational therapy were less likely to fail therapy (OR: 4.71, 95% CI: 1.03-21.65, P=0.034) and tended to have a shorter duration of mechanical ventilation. Gender (OR: 4.35, 95% CI: 1.08-3.60, P=0.037), history of chronic obstructive pulmonary disease (OR: 9.35, 95% CI: 0.06-0.19, P=0.007) and peripheral catheter use (OR: 3.00, 95% CI: 0.07-0.19, P=0.002) are risk factors for clinical outcome. Therefore, the use of fosfomycin combinational therapy for treatment of infection due to CRKP appears to be associated with improved survival rate.

The Role of Porphyrin-Free-Base in the Electronic Structures and Related Properties of N-Fused Carbazole-Zinc Porphyrin Dye Sensitizers.

Dye sensitizers can significantly affect power conversion efficiency of dye-sensitized solar cells (DSSCs). Porphyrin-based dyes are promising sensitizers due to their performances in DSSCs. Here, based upon a N-fused carbazole-zinc porphyrin-free-base porphyrin triad containing an ethynyl-linkage (coded as DTBC), the novel porphyrin dyes named DTBC-MP and DTBC-TP were designed by varying the porphyrin-free-base units in the π conjugation of DTBC in order to study the effect of porphyrin-free-base in the modification of electronic structures and related properties. The calculated results indicate that, the extension of the conjugate bridge with the porphyrin-free-base unit results in elevation of the highest occupied molecular orbital (HOMO) energies, decrease of the lowest unoccupied molecular orbital (LUMO) energies, reduction of the HOMO-LUMO gap, red-shift of the absorption bands, and enhancement of the absorbance. The free energy changes demonstrate that introducing more porphyrin-free-base units in the conjugate bridge induces a faster rate of electron injection. The transition properties and molecular orbital characters suggest that the different transition properties might lead to a different electron injection mechanism. In terms of electronic structure, absorption spectra, light harvesting capability, and free energy changes, the designed DTBC-TP is a promising candidate dye sensitizer for DSSCs.

MiR-506 is down-regulated in clear cell renal cell carcinoma and inhibits cell growth and metastasis via targeting FLOT1.

BACKGROUND: Some microRNAs (miRNAs) are abnormally expressed in cancer and contribute to tumorigenesis. In the present study, we investigated the role of miR-506 in clear cell renal cell carcinoma (ccRCC). METHODS: miR-506 expression was detected in renal cancer cell lines 786-O, ACHN, Caki-1, and Caki-2 and ccRCC specimens by quantitative real-time-PCR. We assessed the association of miR-506 expression with pathology and prognosis in ccRCC patients. We over-expressed and knocked-down miR-506 expression in two renal cancer cell lines, 786-O and ACHN, and assessed the impact on cell proliferation, migration and invasion. A luciferase reporter assay was conducted to confirm the target gene of miR-506 in renal cancer cell lines. RESULTS: miR-506 was significantly down-regulated in renal cancer cell lines and ccRCC specimens. Low miR-506 expression in ccRCC specimens was associated with an advanced clinical stage and poor prognosis. miR-506 expression was an independent prognostic marker of overall ccRCC patient survival in a multivariate analysis. Over-expression of miR-506 in renal cancer cells decreased cell growth and metastasis, In contrast, down-regulation of miR-506 expression promoted renal cancer cell growth and metastasis. FLOT1, a potential target gene of miR-506, was inversely correlated with miR-506 expression in ccRCC tissues. Consistent with the effect of miR-506, knockdown of FLOT1 by siRNA inhibited cell malignant behaviors. Rescue of FLOT1 expression partially restored the effects of miR-506. CONCLUSIONS: miR-506 exerts its anti-cancer function by directly targeting FLOT1 in renal cancer, indicating a potential novel therapeutic role in renal cancer treatment.

Upregulation of long non-coding RNA MALAT1 correlates with tumor progression and poor prognosis in clear cell renal cell carcinoma.

Long noncoding RNAs (lncRNAs) have been investigated as a new class of regulators of cellular processes, such as cell growth, apoptosis, and carcinogenesis. LncRNA metastasis-associated lung adenocarcinoma transcript 1 (MALAT1) has recently been identified to be involved in tumorigenesis of several cancers such as lung cancer, pancreatic cancer, and cervical cancer. However, the role of lncRNA MALAT1 in clear cell renal cell carcinoma (ccRCC) remains unclear. Expression levels of lncRNA MALAT1 in ccRCC tissues and renal cancer cell lines were evaluated by quantitative real-time PCR (qRT-PCR), and its association with overall survival of patients was analyzed by statistical analysis. Small interfering RNA (siRNA) was used to suppress MALAT1 expression in renal cancer cells. In vitro assays were conducted to further explore its role in tumor progression. The expression level of MALAT1 was higher in ccRCC tissues and renal cancer cells compared to adjacent non-tumor tissues and normal human proximal tubule epithelial cells HK-2. The ccRCC patients with higher MALAT1 expression had an advanced clinical features and a shorter overall survival time than those with lower MALAT1 expression. And multivariate analysis showed that the status of MALAT1 expression was an independent predictor of overall survival in ccRCC. Additionally, our data indicated that knockdown expression of MALAT1 decreased renal cancer cell proliferation, migration, and invasion. Our data suggested that lncRNA MALAT1 was a novel molecule involved in ccRCC progression, which provided a potential prognostic biomarker and therapeutic target.

The adsorption of α-cyanoacrylic acid on anatase TiO2 (101) and (001) surfaces: a density functional theory study.

The adsorption of α-cyanoacrylic acid (CAA) on anatase TiO2 (101) and (001) surfaces, including adsorption energies, structures, and electronic properties, have been studied by means of density functional theory calculations in connection with ultrasoft pseudopotential and generalized gradient approximation based upon slab models. The most stable structure of CAA on anatase TiO2 (101) surface is the dissociated bidentate configuration where the cyano N and carbonyl O bond with two adjacent surface Ti atoms along [010] direction and the dissociated H binds to the surface bridging O which connects the surface Ti bonded with carbonyl O. While for the adsorption of CAA on (001) surface, the most stable structure is the bidentate configuration through the dissociation of hydroxyl in carboxyl moiety. The O atoms of carboxyl bond with two neighbor surface Ti along [100] direction, and the H from dissociated hydroxyl interacts with surface bridging O, generating OH species. The adsorption energies are estimated to be 1.02 and 3.25 eV for (101) and (001) surfaces, respectively. The analysis of density of states not only suggests the bonds between CAA and TiO2 surfaces are formed but also indicates that CAA adsorptions on TiO2 (101) and (001) surfaces provide feasible mode for photo-induced electron injection through the interface between TiO2 and CAA. This is resulted from that, compared with the contribution of CAA orbitals in valence bands, the conduction bands which are mainly composed of Ti 3d orbitals have remarkable reduction of the component of CAA orbitals.

High expression of long non-coding RNA SPRY4-IT1 predicts poor prognosis of clear cell renal cell carcinoma.

INTRODUCTION: Long non-coding RNAs (lncRNAs) play a key role in cellular processes, such as cell growth, apoptosis, and carcinogenesis. lncRNAs SPRY4-IT1 has recently been identified to be involved in tumorigenesis of several cancers such as non-small cell lung cancer and esophageal squamous cell carcinoma. However, the role of SPRY4-IT1 in clear cell renal cell carcinoma (ccRCC) remains unclear. METHODS: The expression of SPRY4-IT1 was examined in ccRCC patients and renal cancer cell lines by using quantitative real-time PCR (qRT-PCR). The relationship between SPRY4-IT1 level and clinicopathological parameters of ccRCC was analyzed with the Kaplan-Meier method and Cox proportional hazards model. Small interfering RNA (siRNA) was used to suppress SPRY4-IT1 expression in renal cancer cell line 786-O. In vitro assays were performed to further explore its role in renal cancer progressio. RESULTS: The relative level of SPRY4-IT1 was significantly higher in ccRCC tissues compared to the adjacent normal renal tissues. And higher expression of SPRY4-IT1 was found in renal cancer cell lines compared with the normal human proximal tubule epithelial cell line HK-2. The ccRCC patients with higher SPRY4-IT1 expression had an advanced clinical stage and poorer prognosis than those with lower SPRY4-IT1 expression. Multivariate analyses by Cox's proportional hazard model revealed that expression of SPRY4-IT1 was an independent prognostic factor in ccRCC. In vitro assays, our results indicated that knockdown of SPRY4-IT1 reduced renal cancer cell proliferation, migration, and invasion. CONCLUSIONS: Our data suggested that lncRNA SPRY4-IT1 might be considered as a potential prognostic indicator and a potential target for therapeutic intervention in RC.

Ratio of prostate specific antigen to the outer gland volume of prostrate as a predictor for prostate cancer.

OBJECTIVE: As a definite diagnosis of prostate cancer, puncture biopsy of the prostate is invasive method. The aim of this study was to evaluate the value of OPSAD (the ratio of PSA to the outer gland volume of prostate) as a non-invasive screening and diagnosis method for prostate cancer in a select population. METHODS: The diagnosis data of 490 subjects undergoing ultrasound-guided biopsy of the prostate were retrospectively analyzed. This included 133 patients with prostate cancer, and 357 patients with benign prostate hyperplasia (BPH). RESULTS: The OPSAD was significantly greater in patients with prostate cancer (1.87 ± 1.26 ng/ml(2)) than those with BPH (0.44 ± 0.21 ng/ml(2)) (P < 0.05). Receiver operating characteristic (ROC) curve analysis revealed that the performance of OPSAD as a diagnostic tool is superior to PSA and PSAD for the diagnosis of prostate cancer. In the different groups divided according to the Gleason score of prostate cancer, OPSAD is elevated with the rise of the Gleason score. CONCLUSION: OPSAD may be used as a new indicator for the diagnosis and prognosis of prostate cancer, and it can reduce the use of unnecessary puncture biopsy of the prostate.

Primary angiosarcoma of the kidney: case analysis and literature review.

OBJECTIVE: To study the clinical presentation, diagnosis, treatment and prognosis of primary angiosarcoma of the kidney. METHODS: We treated a patient with primary angiosarcoma, then searched the published papers with the terms of 'primary angiosarcoma of the kidney' and 'primary renal angiosarcoma' in PubMed database, found 27 patients with detailed data, and analyzed their characters in the clinical presentation, diagnosis, treatment and prognosis. RESULTS: The primary angiosarcoma occurred mainly from 50 years old to 69 years old, predominated in male patients. The clinical presentation was flank pain and hematuria, and the nephrectomy was the mainstay of the treatment; the maximum diameter and the metastasis status at the time of diagnosis had important prognostic value. CONCLUSIONS: The primary angiosarcoma is a rare carcinoma and lacks of specific presentation. Accurate diagnosis depends on pathological examination. Surgery is the mainstay of the treatment, but the prognosis is poor.

Bromodomain 4 protein is a predictor of survival for urothelial carcinoma of bladder.

BACKGROUND: Bromodomain 4 (BRD4) protein is a double bromodomain-containing protein that binds preferentially to acetylated chromatins. BRD4 is essential for cellular growth and has been implicated in cell cycle control, DNA replication and carcinogenesis. However, its expression profile and prognostic value in urothelial carcinoma of the bladder (UCB) have not been investigated. METHODS: Real-time quantitative PCR (qRT-PCR) and Western blot were used to explore BRD4 expression in UCBs and normal bladder tissues. Moreover immunohistochemistry (ICH) was used to detect the expression of BRD4 in UCBs. Spearman's rank correlation, Kaplan-Meier plots and Cox proportional hazards regression model were used to analyze the data. RESULTS: Up-regulated expression of BRD4 mRNA and protein was observed in the majority of UCBs by qRT-PCR and Western blot when compared with their paired normal bladder tissues. Clinicopathological analysis was showed a significant correlation existed between the higher expression of BRD4 protein with the histological grade, lymph node metastasis and distant metastasis (P < 0.05); Survival analysis by Kaplan-Meier survival curve and log-rank test demonstrated that elevated BRD4 expression in bladder cancer tissue predicted poorer overall survival (OS) compared with group in lower expression. Notably, multivariate analyses by Cox's proportional hazard model revealed that expression of BRD4 was an independent prognostic factor in UCB. CONCLUSIONS: These results suggest that the aberrant expression of BRD4 in human UCB is possibly involved in the tumorigenesis and development, and the BRD4 protein could act as a potential biomarker for prognosis assessment of bladder cancer. Further studies on the cellular functions of BRD4 need to address these issues.

Up-regulation of flotillin-2 is associated with renal cell carcinoma progression.

Flotillin-2 (FLOT2) is a highly conserved protein isolated from caveolae/lipid raft domains that tether growth factor receptors linked to signal transduction pathway. FLOT2 has recently been identified to be involved in tumorigenesis of several cancers such as breast cancer, melanoma, and gastric cancer. However, the role of FLOT2 in renal cell carcinoma (RCC) remains unclear. The expression levels of FLOT2 in RCC patients and renal cancer cell lines were evaluated by quantitative real-time PCR (qRT-PCR) and Western blot. FLOT2 protein expression was also analyzed in archived paraffin-embedded RCC tissues using immunohistochemistry (IHC), and its association with overall survival of patients was analyzed by statistical analysis. Small-interfering RNA (siRNA) was used to suppress FLOT2 expression in RCC cell lines. In vitro assays were performed to further explore its role in tumor progression. The expression level of FLOT2 was higher in RCC tissues and cell lines than in corresponding adjacent normal tissues and normal human proximal tubule epithelial cell line HK-2. IHC analysis revealed high expression levels of FLOT2 in RCC specimens. The RCC patients with higher FLOT2 expression had an advanced clinical stage and poorer prognosis than those with lower FLOT2 expression. FLOT2 expression was an independent prognostic marker of overall RCC patient survival in a multivariate analysis. In vitro assays indicated that knockdown of FLOT2 reduced cell proliferation, migration, and invasion. Our data suggest that FLOT2 is a novel molecule involved in RCC progression, which provide a potential prognostic biomarker and therapeutic target.

Effect of free radical scavenger on c-jun activation in rats with crush syndrome.

OBJECTIVES: To evaluate the relationship between reactive oxygen species (ROS)-mediated kidney injuries and Jun N-terminal kinase (JNK) activity and the therapeutic effects of tempol in crush syndrome (CS) model rats. METHODS: Male Wister rats were randomly divided into sham operation group (SOG), CS groups (CS6G, CS12G and CS24G) and tempol treatment group (TG, a ROS scavenger). CS model rats were established by crushing the hind limbs of rats with 15 kg pressure for 6 hours, and inferior caval vein blood and kidney samples were harvested at 6, 12, 24 hours after removing crush pressure. In TG, 100 mg/kg tempol was intraperitoneally injected into CS model rats after withdraw of crush pressure. In SOG, rats were fixed on the board without any crush pressure. The activation of c-jun was determined by western blotting. Serological parameters and the content of malondialdehyde (MDA) in kidney tissues were determined by standard methods. RESULTS: Acute kidney injury reached the peak at 12 hours after the crush pressure. Compared with SOG, the content of phosphorylated c-jun was significantly higher in CSG and TG (p < 0.05), and the content of phosphorylated c-jun in the CSG was significantly higher than that in TG (p < 0.05). Interestingly, the changes of the MDA content in the kidney tissues of the 3 groups were similar to the changes of phosphorylated c-jun content. CONCLUSION: ROS-mediated phosphorylation of c-jun may play important roles in the acute kidney injury of CS rats. Tempol can inhibit the phosphorylation of c-jun and alleviate the acute kidney injury.

Improvement of erectile function in patients with benign prostatic hyperplasia undergoing transurethral plasmakinetic resection of the prostate.

OBJECTIVE: Although transurethral resection of the prostate remains the gold standard surgical treatment for benign prostatic hyperplasia, transurethral plasmakinetic resection of the prostate has become a popular alternative. This study investigated the effects of plasmakinetic resection of the prostate on erectile function. METHODS: A total of 400 patients that underwent plasmakinetic resection of the prostate or transurethral resection of the prostate were prospectively enrolled in this study. Of these, 384 patients met the inclusion criteria. One experienced surgeon carried out all the procedures. The International Prostate Symptom Score, International Index of Erectile Function-5, maximum flow rate and ultrasound postvoid residual volume were determined, and evaluated preoperatively and at 12 months postoperatively. Prostate-specific antigen, age and prostate volume of each patient were recorded. RESULTS: The median International Index of Erectile Function-5 score of plasmakinetic resection of the prostate patients significantly increased from 8.0 (interquartile range 7.0-9.0) preoperatively to 21.0 (19.0-22.0) at 12 months postoperatively (P < 0.05). The score of plasmakinetic resection of the prostate patients was significantly higher than that of the transurethral resection of the prostate group (P < 0.05); however, the International Prostate Symptom Score of the plasmakinetic resection of the prostate group was not significantly different from that of the transurethral resection of the prostate group (P > 0.05). CONCLUSIONS: A significant improvement in erectile function can be observed at 12 months in patients undergoing plasmakinetic resection of the prostate. Despite these encouraging findings, the effects of plasma kinetic resection of the prostate on erectile function remain to be further studied.

Protective effects of SP600125 on renal ischemia-reperfusion injury in rats.

BACKGROUND: Ischemia/reperfusion injury (IRI) has a negative effect on renal allograft survival. Using a rat model of kidney IRI in this study, we investigated the overall effect of selective c-Jun N-terminal kinase (JNK) inhibitor SP600125 on renal IRI events. METHODS: All 45 Fisher rats were anesthetized and renal IRI model was established by 45 min clamp of bilateral renal pedicles and 24 h reperfusion. Vehicle solution or SP600125 solution was intraperitoneally injected 45 min before ischemia, respectively. Analysis of renal histology, function, reactive oxygen species (ROS) expression, JNK phosphorylation status, as well as intra-renal pro-inflammatory cytokines expression was evaluated in this study. RESULTS: After IRI, the levels of blood urea nitrogen, creatinine, tissue malondialdehyde, TNF-α, IL-1ß, IL-6 were all elevated significantly, while superoxide dismutase, catalase activity were decreased. Histologic findings showed severe devastating lesions and increased rodent cell apoptosis; SP600125 effectively improved morphologic features, reversed above-mentioned parameters, and significantly attenuated c-Jun phosphorylation, as well as intra-renal pro-inflammatory cytokines expression compared with vehicle-treated group. CONCLUSION: These data demonstrate that inhibition of c-Jun with SP600125 is capable of attenuating renal IRI, which might be a novel therapy target.

Feeding deterrents from Aconitum episcopale roots against the red flour beetle, Tribolium castaneum.

The screening for insecticidal principles from several Chinese medicinal herbs showed that the ethanol extract of Aconitum episcopale roots possessed significant feeding deterrence against the red flour beetle, Tribolium castaneum . From the ethanol extract, six feeding deterrents were isolated by bioassay-guided fractionation. The compounds were identified as chasmanine, crassicauline A, karacoline, sachaconitine, talatisamine, and yunaconitine from their spectroscopic data. Chasmanine, talatisamine, karacoline, and sachaconitine exhibited feeding deterrent activity against T. castaneum adults, with EC(50) values of 297.0, 342.8, 395.3, and 427.8 ppm, respectively. Yunaconitine and crassicauline A also possessed feeding deterrent activity against T. castaneum adults, with EC(50) values of 653.4 and 1134.5 ppm, respectively.

Retroperitoneal laparoscopic partial nephrectomy for renal-cell carcinoma in a solitary kidney: report of 56 cases.

OBJECTIVE: The aim of this study was to evaluate the possibility and clinical efficacy of retroperitoneal laparoscopic partial nephrectomy for T(1)- and T(2)-stage renal-cell carcinoma (RCC) of a solitary kidney. PATIENTS AND METHODS: A total of 56 patients with RCC in a solitary kidney were selected in this study, including 41 men and 15 women with a mean age of 49 years. B-type ultrasonography and CT revealed T(1)N(0)M(0) tumors in 51 cases and T(2)N(0)M(0) tumors in the remaining 5 cases; 41 cases were RCC in left kidney, and 15 were RCC in right kidney. Of them, 24 cases had RCC located in the upper pole, 24 in the inferior pole, and 8 in the central region of the kidney. The mean tumor diameter was 3.0 +/- 0.8 cm (1.5-5.5 cm). Postoperative pathology report showed 46 cases of T(1)-stage tumor (T(1a): 38; T(1b): 8) and 10 cases of T(2) stage. Retroperitoneal laparoscopic nephron-sparing surgery was performed. Surgical resection was performed along a resection line 0.5 cm from the tumors. Renal function was determined using emission CT before and after operation. Preoperative three-dimensional CT image reconstruction was performed using multislice spiral CT. RESULTS: All procedures were successfully performed without open conversion and serious complications. The mean warm ischemia time was 24 +/- 4.2 minutes (19-50 minutes). The mean operation time was 95 +/- 14.5 minutes. The mean blood loss volume was 105 +/- 20.4 mL. No postoperative urine leakage occurred. Both serum creatinine and nitrogen levels were normal after operation in all cases. The mean hospital stay was 9 +/- 2 days. There was no requirement for hemodialysis. No recurrence, metastasis, and implantation were observed during the 20 +/- 4 month follow-up periods, with a survival rate of 100%. CONCLUSIONS: Laparoscopic partial nephrectomy can be performed safely and effectively in selected patients with tumors in a solitary kidney owing to its minimal invasion, clear dissection, less hemorrhage, and rapid recovery.