The signaling pathways that mediate the anti-cancer effects of caloric restriction.

Caloric restriction (CR) has been shown to promote longevity and ameliorate aging-associated diseases, including cancer. Extensive research over recent decades has revealed that CR reduces IGF-1/PI3K/AKT signaling and increases sirtuin signaling. We recently found that CR also enhances ALDOA/DNA-PK/p53 signaling. In the present review, we summarize the molecular mechanisms underlying the modulation of the IGF-1/PI3K/AKT pathway, sirtuin signaling, and the ALDOA/DNA-PK/p53 pathway by CR. We also summarize the evidence concerning the roles of these signaling pathways in carcinogenesis, and discuss how they are regulated by CR. Finally, we discuss the crosstalk between these signaling pathways.

Comparative Decellularization and Recellularization of Normal Versus Streptozotocin-Induced Diabetes Mellitus Rat Pancreas.

Decellularized (DC) organs/tissues offer a promising scaffold for regenerative bioengineering. However, it is not clear whether the diabetic mellitus (DM) pancreas can be used in decellularized and recellularized bioengineering. For assessment of these questions, murine pancreatic scaffolds of normal, type 1DM (T1DM) and type 2 DM (T2DM) pancreas were generated using a perfusion decellularization technique and assessed by histology, scanning electron microscopy, immunohistochemistry, and enzyme-linked immunosorbent assay (ELISA). The capacity of DC pancreatic scaffolds to support attachment and proliferation of human umbilical vein endothelial cells (HUVECs) and MIN-6 ß cells was also assessed. Our results showed that DC pancreatic scaffolds were successfully produced from T1DM and T2DM pancreas and maintained their extracellular matrix (ECM) composition, 3D ultrastructure, and various cytokines. All of the pancreatic scaffolds were sufficiently cytocompatible and were able to support proliferation and adhesion of HUVECs and MIN-6 ß cells. The preliminary results support the biological utility of diabetes mellitus pancreatic scaffolds and pave the way for further investigations to assess the potential ability of using diabetes mellitus pancreas as scaffolds for recellularization and eventual medical applications.

Surgical Treatment and Chemotherapy of Adult Primary Liver Sarcoma: Experiences from a Single Hospital in China.

BACKGROUND: The aim of this study is to improve the preoperative diagnostic accuracy and treatment results by investigating the clinical features and prognosis of primary liver sarcoma (PLS). METHODS: Clinical data, surgical treatments, adjuvant chemotherapy, and prognosis of 17 PLS patients whose diseases were pathologically confirmed were retrospectively analyzed. RESULTS: The main clinical symptoms included epigastric pain in 9 patients, epigastric distention in 7, and loss of appetite in 4; these symptoms were detected during the postoperative follow-up for gastric carcinoma in 1. The resection rate was 64.7% (12/17), including R0 resection in 10 patients and R1 resection in 2, and laparotomy with biopsy in 5. Five patients accepted an adjuvant selective hepatic artery infusion chemotherapy (mitomycin C 16-20 mg+ 5-fluorouracil 5.0 g+ epirubicin 40-50 mg), and 4 accepted adjuvant systemic chemotherapy (vincristin, cisplatin, cyclophosphamide, and adriamycin). All 5 patients with simple laparotomy died within 1 year, and the overall 1-, 3-, and 5-year survival rates for all patients were 58.8% (10/17), 29.4% (5/17) and 11.7% (2/17), respectively, whereas those were 100.0% (10/10), 50.0% (5/10), and 20.0% (2/10) for R0 resected patients respectively. CONCLUSIONS: The diagnosis of PLS is difficult before operation due to its nonspecific manifestations, and the high survival rate can be achieved by radical resection with adjuvant chemotherapy.

MicroRNA-34a promotes MICB expression in hepatocytes.

MicroRNA-34a (miR-34a) behaves as a tumor suppressor by decreasing the expression of oncogenes involved in multiple carcinogenic pathways. Intravenous delivery of miR-34a mimics has been investigated in clinical trials as a potential treatment for advanced cancers; however, the effect of miR-34a on cancer immune surveillance is controversial. In the current study, we found that miR-34a plays a dual role in the regulation of major histocompatibility complex class I-related sequence B (MICB) protein, a ligand of the NKG2D receptor. MiR-34a could both induce and reduce MICB expression by upregulating ataxia telangiectasia and Rad3-related (ATR) protein kinase and downregulating the transcription factor E2F1, respectively. The net effect of miR-34a on MICB expression depended on endogenous E2F1 levels. Overexpression of miR-34a promoted MICB expression in hepatocytes and hepatocellular carcinoma (HCC) cells that have low E2F1 levels but not in HCC cells that have high E2F1 levels. In HCC patients, the expression of miR-34a and MICB showed positive correlation in paratumor liver tissues, which have low E2F1 levels, but not in HCC tissues, which have high E2F1 levels. We showed that miR-34a overexpression in non-transformed liver cells enhanced cytolysis and interferon-γ production by NK-92MI cells. Furthermore, higher miR-34a expression in tumor and paratumor tissues was associated with positive and negative outcomes, respectively, in HCC patients. Our findings suggest that miR-34a induces MICB expression in paratumor liver tissues, which may cause liver damage and serious cytokine release syndrome, thus disclosing potential side effects of systemic administration of miR-34a in anticancer therapy.

MicroRNA-30a Suppresses the Activation of Hepatic Stellate Cells by Inhibiting Epithelial-to-Mesenchymal Transition.

BACKGROUND/AIMS: The activation of hepatic stellate cells (HSCs) is considered as a pivotal event in liver fibrosis and epithelial-mesenchymal transition (EMT) process has been reported to be involved in HSC activation. It is known that microRNAs (miRNAs) play a pro-fibrotic or anti-fibrotic role in HSC activation. Recently, emerging studies show that miR-30a is down-regulated in human cancers and over-expression of miR-30a inhibits tumor growth and invasion via suppressing EMT process. However, whether miR-30a could regulate EMT process in HSC activation is still unclear. METHODS: miR-30a expression was quantified using real-time PCR in carbon tetrachloride (CCl4)-induced rat liver fibrosis, activated HSCs and patients with cirrhosis. Roles of miR-30a in liver fibrosis in vivo and in vitro were also analyzed. Luciferase activity assays were performed to examine the binding of miR-30a to the 3'-untranslated region of snail family transcriptional repressor 1 (Snai1). RESULTS: miR-30a was down-regulated in human cirrhotic tissues. In CCl4 rats, reduced miR-30a was found in fibrotic liver tissues as well as isolated HSCs. There was a significant reduction in miR-30a in primary HSCs during culture days. miR-30a over-expression resulted in the suppression of CCl4-induced liver fibrosis. Restoration of miR-30a led to the inhibition of HSC activation including cell proliferation, α-SMA and collagen expression. Notably, miR-30a inhibited EMT process, with a reduction in TGF-ß1 and Vimentin as well as an increase in GFAP and E-cadherin. miR-30a induced a significant reduction in Snai1 protein expression when compared with the control. Interestingly, Snail protein expression was increased during liver fibrosis, indicating that there may be a negative correlation between miR-30a level and Snai1 protein expression. Further studies demonstrated that Snai1 was a target of miR-30a. CONCLUSION: Our results suggest that miR-30a inhibits EMT process, at least in part, via reduction of Snai1, leading to the suppression of HSC activation in liver fibrosis.

Dicer regulates non-homologous end joining and is associated with chemosensitivity in colon cancer patients.

DNA double-strand break (DSB) repair is an important mechanism underlying chemotherapy resistance in human cancers. Dicer participates in DSB repair by facilitating homologous recombination. However, whether Dicer is involved in non-homologous end joining (NHEJ) remains unknown. Here, we addressed whether Dicer regulates NHEJ and chemosensitivity in colon cancer cells. Using our recently developed NHEJ assay, we found that DSB introduction by I-SceI cleavage leads to Dicer upregulation. Dicer knockdown increased SIRT7 binding and decreased the level of H3K18Ac (acetylated lysine 18 of histone H3) at DSB sites, thereby repressing the recruitment of NHEJ factors to DSB sites and inhibiting NHEJ. Dicer overexpression reduced SIRT7 binding and increased the level of H3K18Ac at DSB sites, promoting the recruitment of NHEJ factors to DSBs and moderately enhancing NHEJ. Dicer knockdown and overexpression increased and decreased, respectively, the chemosensitivity of colon cancer cells. Dicer protein expression in colon cancer tissues of patients was directly correlated with chemoresistance. Our findings revealed a function of Dicer in NHEJ-mediated DSB repair and the association of Dicer expression with chemoresistance in colon cancer patients.

A nomogram based on preoperative inflammatory markers predicting the overall survival of pancreatic ductal adenocarcinoma.

BACKGROUND AND AIMS: Developing a preoperative prediction model for estimating the risk of pancreatic ductal adenocarcinoma (PDAC) patients before pancreaticoduodenectomy is a difficult task. The purpose of current study was to develop a prognostic nomogram based on inflammatory markers for PDAC patients. METHODS: Cox regression analysis was performed to calculate the overall survival (OS) and assess the prognostic factors based on 265 PDAC patients undergone surgery. The nomogram was built to estimate the probability of 1-year, 3-year, and 5-year OS. The predictive accuracy of nomogram was determined by concordance index, calibration curve, and time dependent receiver operating characteristics. RESULTS: In multivariable Cox analysis, vascular invasion, Tumor Grade, TNM stage, neutrophil-to-lymphocyte ratio, platelet-to-lymphocyte ratio, and albumin/globulin ratio were significantly associated with OS, which were all assembled into nomogram. The calibration curves for probability of survival showed optimal agreement between nomogram prediction and actual observation. The concordance index for 1-year, 3-year and 5-year OS prediction were 0.860 (95% confidence intervals (CI): 0.837-0.885), 0.837 (95%CI: 0.819-0.856), and 0.809 (95%CI: 0.787-0.829), respectively. The area under time dependent receiver operating characteristics curve of 1-year, 3-year, and 5-year OS prediction were 0.938 (95%CI: 0.886-0.989), 0.844 (95%CI: 0.782-0.906), and 0.884 (95%CI: 0.792-0.976), suggesting high discriminative ability of nomogram. It allowed significant distinction survival outcomes by grouping the patients evenly into three subgroups after sorting by total points. CONCLUSIONS: Based on clinicopathology characteristics and inflammatory markers, we developed a nomogram providing an individualized risk estimate for PDAC patients.

Association between XPG polymorphisms and stomach cancer susceptibility in a Chinese population.

Xeroderma pigmentosum group G (XPG) protein plays an important role in the DNA repair process by cutting the damaged DNA at the 3' terminus. Previous studies have indicated some polymorphisms in the XPG gene are associated with stomach cancer susceptibility. We performed this hospital-based case-control study to evaluate the association of four potentially functional XPG polymorphisms (rs2094258 C>T, rs751402 C>T, rs2296147 T>C and rs873601G>A) with stomach cancer susceptibility. The four single nucleotide polymorphisms (SNPs) were genotyped in 692 stomach cancer cases and 771 healthy controls. Logistic regression analysis was conducted, and odds ratios (ORs) and 95% confidence intervals (CIs) were used to assess the association of interest. Of the studied SNPs, XPG rs873601G>A polymorphism was found to significantly associate with stomach cancer susceptibility (AA versus GG/AG: OR = 1.31, 95% CI = 1.03-1.66, P = 0.027). Combined analysis of all SNPs revealed that the individuals with two of risk genotypes had a significantly increased stomach cancer risk (OR = 1.52, 95% CI = 1.13-2.06). In the stratification analysis, the association between the rs873601AA genotype and stomach cancer risk was observed in older group (>59 year), as well as patients with non-cardia stomach cancer. Further combined analysis indicated men, smokers, or non-drinkers more than one risk genotypes had a significantly increased stomach cancer risk. Our results indicate that XPG rs873601G>A polymorphism may be associated with the risk of stomach cancer. Further prospective studies with different ethnicities and large sample sizes are needed to validate our findings.

Effects of capsicine on rat cytochrome P450 isoforms CYP1A2, CYP2C19, and CYP3A4.

Due to the frequent consumption of capsaicin (CAP) and its current therapeutic application, the correct assessment of this compound is important from a public health standpoint. The purpose of this study was to find out whether CAP affects rat cytochrome P450 (CYP) enzymes (CYP1A2, CYP2C19, and CYP3A4) by using cocktail probe drugs in vivo. A cocktail solution at a dose of 5 mL/kg, which contained phenacetin (15 mg/kg), omeprazole (15 mg/kg), and midazolam (10 mg/kg), was given orally to rats treated for 7 d with oral administration of CAP. Blood samples were collected at a series of time-points and the concentrations of probe drugs in plasma were determined by HPLC-MS. The results showed that treatment with multiple doses of CAP had no significant effect on rat CYP1A2. However, CAP had a significant inhibitory effect on CYP2C19 and an inductive effect on CYP3A4. Therefore, caution is needed when CAP is co-administered with some CYP substrates clinically because of potential drug-CAP interactions.

[Sedum sarmentosun bunge extraction ameliorated severe acute pancreatitis-induced lung injury: an experimental research]].

OBJECTIVE: To explore the effect of Sedum sarmentosum Bunge Extract (SSBE) on severe acute pancreatitis (SAP) induced acute lung injury (ALI) model rats and their excessive inflammatory reactions. METHODS: Forty-two healthy adult male Sprague-Dawley (SD) rats were randomly divided into 3 groups, the sham-operated control group (C), the SAP group (SAP), and the SSBE treated group (SSBE), 14 in each group. SAP induced ALl rat model was induced by retrograde injection of 5% sodium taurocholate (1 mL/kg) into the pancreatic duct. SSBE (100 m/kg) was administrated subcutaneously after the establishment of the SAP model. Equal dose of SSBE was injected again 12 h later. Equal volume of normal saline was administrated in the same way for rats in the C group and the SAP group. Rats were sacrificed after successful modeling and samples taken at 12 and 24 h. Pathological changes in the pancreas and the lung tissue were observed under light microscope. The ascites, serum amylase (AMS), wet/dry proportion (W/D) of the lung tissue, activities of myeloperoxidase (MPO), interleukin-1 (IL-1), IL-6, and tumor necrosis factor-alpha (TNF-alpha) were also measured. RESULTS: Ascites and serum AMS activities significantly increased; MPO, IL-1, IL-6, TNF-alpha contents, and W/D ratio also significantly increased in the SAP group, when compared with the C group (P<0.05). Compared with the SAP group, those parameters were all attenuated in the SSBE group at 12 and 24 h (P<0.05, P<0.01). Pathological changes in the pancreas and the lung tissue were alleviated in the SSBE group under light microscope. The injury degree ranged between that of the C group and the SAP group. CONCLUSION: SSBE could relieve the ALl in SAP model rats, which could be achieved through alleviating inflammation responses of SAP rats.

Effect of NK4 transduction in bone marrow-derived mesenchymal stem cells on biological characteristics of pancreatic cancer cells.

Pancreatic cancer usually has a poor prognosis, and no gene therapy has yet been developed that is effective to treat it. Since a unique characteristic of bone marrow-derived mesenchymal stem cells (MSCs) is that they migrate to tumor tissues, we wanted to determine whether MSCs could serve as a vehicle of gene therapy for targeting pancreatic cancer. First, we successfully extracted MSCs from SD rats. Next, MSCs were efficiently transduced with NK4, an antagonist of hepatocyte growth factor (HGF) which comprising the N-terminal and the subsequent four kringle domains of HGF, by an adenoviral vector. Then, we confirmed that rat MSCs preferentially migrate to pancreatic cancer cells. Last, MSCs expressing NK4 (NK4-MSCs) strongly inhibited proliferation and migration of the pancreatic cancer cell line SW1990 after co-culture. These results indicate that MSCs can serve as a vehicle of gene therapy for targeting pancreatic cancer.

Potential of sivelestat in protection against severe acute pancreatitis-associated lung injury in rats.

The incidence of acute pancreatitis has been rising worldwide in the past few decades. Despite extensive research efforts, the population-based mortality from acute pancreatitis remains high. Since dysfunction of multiple vital organs, most importantly the lungs, is the major cause of early death in acute pancreatitis patients, developing effective strategies to manage lung injury has become one of the focuses of recent research efforts aiming at improving the outcome of patients with acute pancreatitis. In this study, we attempted to create a rat model of acute pancreatitis through intraductal infusion of taurocholate and to evaluate the potential of sivelestat, a synthetic neutrophil elastase inhibitor, in protection against acute pancreatitis-associated lung injury using this rat model. The results demonstrated that: (1) 5% sodium taurocholate successfully induced histopathologic and biochemical abnormalities in the circulation, lung and pancreas characteristic of human acute pancreatitis, including an increase in amylase concentration and a decrease in partial arterial oxygen pressure (PaO2) in the blood, increases in activities of myeloperoxidase (MPO) (a lung injury marker) and neutrophil elastase (a quantitative indicator of neutrophil infiltration), and levels of malondialdehyde (an indicator of lipid peroxidation) and tumor necrosis factor-alpha (a major inflammatory mediator) in the lung; (2) intravenous administration of sivelestat effectively attenuated the taurocholate-induced abnormalities in all parameters analyzed except for serum amylase concentration. Our findings have validated the taurocholate model of acute pancreatitis and demonstrated great therapeutic potential for sivelestat in managing acute pancreatitis-associated lung injury.

Simultaneous ultraviolet-C and near-infrared enhancement in heterogeneous lanthanide nanocrystals.

Lanthanide-doped nanocrystals that simultaneously convert near-infrared (NIR) irradiation into emission of shorter (ultraviolet-C, UVC) and longer wavelengths (NIR) offer many exciting opportunities for application in drug release, photodynamic therapy, deep-tissue bioimaging, and solid-state lasing. However, a formidable challenge is the development of lanthanide-doped nanocrystals with efficient UVC and NIR emissions simultaneously due to their low conversion efficiency. Here, we report a dye-sensitized heterogeneous core-multishell architecture with enhanced UVC emission and NIR emission under 793 nm excitation. This nanocrystal design efficiently suppresses energy trapping induced by interior lattice defects and promotes upconverted UVC emission from Gd3+. Moreover, a significant downshifting emission from Yb3+ at 980 nm was also observed owing to an efficient energy transfer from Nd3+ to Yb3+. Furthermore, by taking advantage of ICG sensitization, we realized a largely enhanced emission from the UVC to NIR spectral region. This study provides a mechanistic understanding of the upconversion and downshifting processes within a heterogeneous architecture while offering exciting opportunities for important biological and energy applications.

Antioxidant inhibits HMGB1 expression and reduces pancreas injury in rats with severe acute pancreatitis.

BACKGROUND: Pathogenesis of severe acute pancreatitis is still unclear, which leads to a lack of proper treatment in severe acute pancreatitis therapeutic strategy. OBJECTIVE: To investigate the effect of treatment with antioxidant pyrrolidine dithiocarbamate on pancreas injury in rats with severe acute pancreatitis and its possible mechanism. METHODS: A total of 144 male Sprague-Dawley rats were randomly allocated into a sham operation group (n=48), a severe acute pancreatitis group (n=48), and a pyrrolidine dithiocarbamate-treated group (n=48). All the rats were killed at 1, 3, 6, 12, 24, and 48 h after operation. The pancreas histopathologies were observed and serum amylase levels were tested. Meanwhile, the nuclear factor-kappaB activation, tumor necrosis factor-alpha levels and high-mobility group box protein-1 expression levels in pancreatic tissue were studied. RESULTS: Animals receiving pyrrolidine dithiocarbamate had significantly improved pancreas histopathology and lower serum amylase levels (p<0.05). In the severe acute pancreatitis group, pancreas tumor necrosis factor-alpha levels reached a peak at 6 h after operation and afterwards rapidly declined to normal levels. However, high-mobility group box protein-1 levels in pancreatic tissue increased remarkably at the 12th hour, reached a peak at 24 h, and maintained up to 48 h post-severe acute pancreatitis. Compared to the severe acute pancreatitis group, the pancreas nuclear factor-kappaB activity, tumor necrosis factor-alpha, high-mobility group box protein-1 levels in the pyrrolidine dithiocarbamate-treated group all remarkably decreased (p<0.05). CONCLUSIONS: High-mobility group box protein-1 seems to act as a late cytokine mediator in the pathogenesis of severe acute pancreatitis. Pyrrolidine dithiocarbamate might inhibit the activation of nuclear factor-kappaB to blockade tumor necrosis factor-alpha, thereby indirectly suppressing the high-mobility group box protein-1 and reducing pancreatic tissue damage in rats with severe acute pancreatitis.

The effect of splenic arterial blood flow (SBF) on severity of hypersplenism and analysis of factors associated with SBF.

BACKGROUND: This study aims to explore the relationship between spleen arterial blood flow (SBF) with platelet count, spleen index (SPI) and the serum nitric oxide (NO) level of patients with liver cirrhosis and to investigate the role of SBF in the development of hypersplenism. METHODOLOGY: Platelet count, SPI, SBF and serum NO levels were evaluated in 100 patients with liver cirrhosis caused by hepatitis B with hypersplenism (cirrhosis group) and 30 healthy persons without hypersplenism (control group). RESULTS: Platelet count in cirrhosis group and control group was 57.0 +/- 25.6 x 109/L and 205.8 +/- 47.4 x 109/L (p = 0.000), SBF was 535.7 +/- 263.7 milmin and 172.2 +/- 66.9 ml/min (p = 0.000), and serum NO level was 98.51 +/- 23.06 micromol/L and 48.43 +/- 19.47 micromol/L (p = 0.000). Linear correlations were made between SBF and platelet count in cirrhosis group (r = -0.573, p = 0.000), SBF and SPI (r = 0.607, p = 0.01), SBF and serum NO level (r = 0.754, p = 0.000). Moreover, serum NO level increased as liver disease aggravated (82.50 +/- 15.04 pmol/L in Child grade A, 94.61 +/- 21.00 micromol/L in grade B and 116.83 +/- 18.03 micromol/L in grade C; grade A versus grade C, p = 0.003). CONCLUSION: The elevation of SBF may play an important role in the development of hypersplenism and disorders in vasoactive factors such as the serum NO caused by liver cirrhosis may play an important role in the elevation of SBF.

[Surgical treatment and prognostic analysis of retroperitoneal paragangliomas: a study of 19 cases].

OBJECTIVE: To investigate the clinical characteristics, surgical treatment and prognostic analysis of retroperitoneal paragangliomas and to enhance the diagnostic and therapeutic levels of retroperitoneal paragangliomas. METHODS: The clinical data of all patients undergoing paraganglioma resection at our department from November 1999 to March 2009 were retrospectively analyzed. The parameters included clinical manifestations, tumor function, surgical findings, operative approach, tumor pathology, imaging study and post-operative survival time. RESULTS: (1) The ratio of male to female was 1.375:1 and the median age 50 years old. The most common presenting symptom was abdominal mass (9/19, 47%). And the preoperative CT misdiagnosis rate was high (89%). (2) The most common tumor location was periaortic and percival (9/19, 47%). The average maximal diameter of tumors was 8.6 cm. 58% (11/19) tumors had integral peplow, 42% (8/19) adhered to adjacent organs and 26% (5/19) required adjacent organ resection. (3) The rate of functional tumor was 63% (12/19). Preoperative and intra-operative hypertension occurred in 67% (8/12) and 33% (4/12) respectively. (4) Immunohistochemical staining was performed in 18 tumors of 16 patients. Among all tumors, 89% (16/18) showed positive immunoreactivity for chromogranin and 67% (12/18) for S-100. PCNA staining showed different proliferative activities (0%-48% positive). Only malignant tumors showed positive immunoreactivity for Ki-67 staining and P53 staining (20% & 34% respectively). (5) The overall 5-year survival was 77%. Survival was significantly worse after metastasis (χ2=6.604, P=0.01). But it was not dependent on tumor diameter (χ2=3.208, P=0.201), the secreting function of tumor (χ2=0.121, P=0.728) and the status of tumor margins (χ2=0.036, P=0.849). CONCLUSION: It is difficult to make an early diagnosis of retroperitoneal paragangliomas. Survival is significantly worse after metastasis. Lifelong follow-up for recurrence is important. And it is absolutely essential to perform immunohistochemical staining for tumors.

Microscale Self-Assembly of Upconversion Nanoparticles Driven by Block Copolymer.

Lanthanide-based upconversion nanoparticles can convert low-energy excitation to high-energy emission. The self-assembled upconversion nanoparticles with unique structures have considerable promise in sensors and optical devices due to intriguing properties. However, the assembly of isotropic nanocrystals into anisotropic structures is a fundamental challenge caused by the difficulty in controlling interparticle interactions. Herein, we report a novel approach for the preparation of the chain-like assemblies of upconversion nanoparticles at different scales from nano-scale to micro-scale. The dimension of chain-like assembly can be fine-tuned using various incubation times. Our study observed Y-junction aggregate morphology due to the flexible nature of amphiphilic block copolymer. Furthermore, the prepared nanoparticle assemblies of upconversion nanoparticles with lengths up to several micrometers can serve as novel luminescent nanostructure and offer great opportunities in the fields of optical applications.

Degradation of endogenous proteins and generation of a null-like phenotype in zebrafish using Trim-Away technology.

Trim-Away is a recent technique to rapidly deplete a protein from any cell type. Guided by antibodies, TRIM21 selects proteins for destruction. However, the applicability of this method in model organisms has not been investigated. Here, we show that Trim-Away can degrade proteins in zebrafish embryos. Trim-Away depletes proteins faster than morpholinos, which enables analysis of protein function during early embryogenesis. Furthermore, Trim-Away can be applied to evaluate the role of maternally contributed proteins in zebrafish embryos. Our findings indicate that Trim-Away is a powerful tool to perform functional analysis of proteins during zebrafish development.

Reply to: Comments on "Nomograms based on inflammatory biomarkers for predicting tumor grade and micro-vascular invasion in stage I/II hepatocellular carcinoma".

We appreciate to receive commentary from Dr Guangtong Deng and Dr Liang Xiao to our article, "Nomograms based on inflammatory biomarkers for predicting tumor grade and micro-vascular invasion in stage I/II hepatocellular carcinoma". First, neutrophil-to-lymphocyte ratio (NLR) and derived NLR (dNLR) are two different parameters. Some studies show that NLR is inconsistent with dNRL in prognostic value through multivariate Cox regression, therefore, it is reasonable that both NLR and dNLR entered into multivariate analysis simultaneously. Second, it is common that articles of predictive nomograms turned continuous variables into categorical variables. The reason is that the categorization of patient clinical variables is beneficial to doctors to make decisions based on the risk level of individual patients in clinical. At last, multicenter validation is quite difficult and we have listed the shortcomings in the limitations of our article. Further validation will need the joint efforts by other institutions.