Methods Study sites Five middle to high elevation mesic shrubland

Methods Study sites Five middle to high elevation mesic shrubland or savannah Hydroxylase inhibitor ecosystem sites were chosen on the islands of Maui

and Hawaii, such that each represented a homogeneous habitat undergoing invasion by an expanding unicolonial population of invasive ants. The five sites were all located in natural areas supporting mostly native vegetation; none represented an invasion from a habitat edge. Habitat homogeneity within each site was judged by consistency of vegetative community type and species composition, as well as by the lack of apparent changes in substrate type or levels of disturbance. There were differences between sites, Acalabrutinib in vitro however, in substrate age, annual rainfall and vegetative type and composition, and hence arthropod density and diversity. The five sites were: Puu O Ili, at 2360 m elevation on the west slope of Haleakala volcano, Haleakala National Park, Maui; Kalahaku, upslope from Puu O Ili at 2800 m elevation in Haleakala National Park; Ahumoa, at 1880 m on the southwestern slope of Mauna Kea, Hawaii Island; Pohakuloa, at 2060 m elevation

on the south slope of Mauna Kea, Hawaii Island; Huluhulu site, at 2040 m elevation in the saddle between Mauna Kea and Mauna Loa, Hawaii Island. These sites are described more fully in Krushelnycky and Gillespie (2008). The Ahumoa site is being invaded by the big-headed ant (P. megacephala), while the other four sites are all being invaded by the Argentine ant (L. humile). These two species are among the most dominant invasive ATM Kinase Inhibitor Galactosylceramidase ants worldwide, and are primarily generalist predators and scavengers, but can also engage in extensive tending of honeydew-producing Hemiptera (Holway et al. 2002). We chose to examine correlates of species vulnerability at the five sites together, combining the effects of the two ant species, for several reasons. In addition to their similar generalist diets, the two ant species are similar in size, and at our sites the big-headed ant occurred at densities and exerted impacts that were intermediate to those

of the Argentine ant (Supplementary Table 1). Furthermore, big-headed ants did not influence rates of variability in population-level impacts differently than did Argentine ants (see “Results”), and separate laboratory behavioral studies indicated that the two ant species exhibited similar aggression towards the same groups of herbivore species (Krushelnycky 2007). Sampling design As in most studies examining the impacts of invasive ants on arthropod communities, we assessed ant effects by comparing arthropod communities in invaded areas with adjacent uninvaded areas. Our sites were carefully selected so as to minimize confounding factors that might be associated with static ant distributional limits, habitat gradients, or with invasions from habitat edges.

When SID increases, [H+ decreases according to the rule of electr

When SID increases, [H+ decreases according to the rule of electroneutrality. SID is usually slightly positive, but fluids of the body cannot be electrically charged. The necessary negative charge comes from pCO2 and Atot. When the production of CO2 exceeds the removal of CO2 in the metabolism of cells, pCO2 increases and causes a rise in [H+. Atot is mainly proteins (mainly albumin) Necrostatin-1 and phosphates and through

them the rule of electroneutrality is fulfilled. If there is a change in one or more independent variable, [H+ changes as a consequence [3]. It is known that nutrition has an effect on acid–base balance, that is, acid load of the human body can be changed via nutrition [6]. It can be evaluated via PRAL (potential renal acid load) whether a certain foodstuff

increases the production of acids or alkali in the body [6, 7]. PRAL can be calculated for 100 g of foodstuff as: PRAL (mEq/100 g) = 0.49 × protein (g/100 g) + 0.037 × check details phosphorous (mg/100 g) – 0.021 x potassium (mg/100 g) – 0.026 × magnesium (mg/100 g) – Osimertinib order 0.013 × calcium (mg/100 g) [7]. A foodstuff with negative PRAL is more alkali than acid forming. For example, fruits and vegetables contain lots of potassium that is a base-forming cation along with magnesium and calcium. Conversely, meat, cheese and cereal products have a positive PRAL and they enhance the production of acids. All protein-rich foodstuffs contain amino acids methionine and cysteine that are acid forming, so nutrition rich in protein and poor in alkali-forming foodstuff increases the acid load of the body [6]. The acid–base balance has an effect on physical performance [8]. Even physical activity of moderate intensity causes metabolic changes, which affect the acid–base balance both in skeletal muscles and other tissues [3]. Maintenance of high alkalinity in extracellular fluids enables faster

H+ removal from the muscle cell and muscle fatigue caused by increased acidosis is delayed [8]. Enhanced Exoribonuclease acid buffering capacity seems to improve both high-intensity anaerobic [9, 10] and aerobic [11] capacity. NaHCO3 is a useful ergogenic aid to increase the [HCO3 - and buffering capacity of the blood [12], but performance can be improved by dietary means as well [13, 14]. It has been observed that protein-rich nutrition combined with a low intake of carbohydrate may cause acidosis and have a negative influence on performance [13]. In one study, for example, low-protein (9.4 ± 1.8%) and high-carbohydrate (65.5 ± 9.8%) diet obeyed for 4 days resulted in higher plasma pH and [HCO3 - prior to the exercise test compared to high-protein (25.3 ± 4.1%) and low-carbohydrate (10.1 ± 6.8%) diet and resulted in a longer time to exhaustion during cycling at 100% of VO2max (345 ± 187 s vs. 221 ± 58 s) [14]. In another study, the use of a plant-based nutrient supplement for 14 days increased the pH of urine, which indicates that the acid load of the body was decreased [15].

The intercellular transmissibility of the mobile genetic elements

The intercellular transmissibility of the mobile genetic elements with carried gene cassettes could constitute important driving forces in genome evolution and speciation of Vibrios, but also mediate the emergence, resurgence and spread of multiple drug resistant pathogens [17–19]. China has become the world’s largest producer of aquatic products since 2002 (People’s Republic of China, Fishery Products Annual Report). The East China Sea has been one of the major fishing grounds, especially

within the Yangtze River plume and its surrounding sea along China’s coast [20]. Along with improved aquaculture production, however, incidences of food-borne illnesses caused by consumption of aquatic products contaminated with Vibrios have Epigenetics inhibitor also rapidly increased, particularly in the littoral provinces [21]. Previous research suggested that acquisition of virulence and resistance traits through horizontal gene transfer might occur at high frequency through microbial contacts in the environment [22]. Nevertheless, to date, numerous studies have been conducted to identify ICEs-harboring Vibrios MK-2206 mw from clinical samples in different parts of the world [23], but very few information is available on environmental isolates. Thus, in this study, we focused on analyzing

the Vibrio strains bearing the SXT/R391-related ICEs that PAK5 were isolated from aquatic products and environment in the Yangtze River Estuary in Shanghai, China.

Molecular structures of the ICEs and phenotypes of their hosts have been characterized. The information will facilitate the better understanding of possible mechanism underlying ICE evolution and dissemination of food-borne diseases mediated by the mobile genetic elements. Results and discussion Bacterial isolation, screening and identification of ICEs-positive strains The Yangze River, being the third largest river (about 6,300 km in length) in the world, originates from the Qingzhang plateau, runs through eleven Chinese provinces and regions, and finally enters into the East China Sea in Shanghai, China. Environmental Combretastatin A4 supplier surface water samples were collected from the Yangtze River Estuary in Shanghai during the years between 2010 and 2011, while aquatic products including shrimps and fish were sampled from fish markets distributed in Shanghai in 2011. Pure cultures of Vibrio isolates were transferred into sterile 96-well microtiter plates, and used for PCR-based screening of the conserved essential integrase gene (int) of SXT/R391-related ICEs (see the Methods). A total of one hundred and fifty three isolates were detected positive for the int gene from about forty one plates.

During the past few years, several procedures have been establish

During the past few years, several procedures have been established for the synthesis of LEE011 price graphene and its derivatives, including mechanical exfoliation, epitaxial growth, unzipping carbon nanotubes, exfoliation of GO, and liquid-phase exfoliation of graphite [21]. Moreover, several other

methods were implemented to prepare high-quality graphene such as chemical vapor deposition selleckchem onto thin films of metal, epitaxial growth on electrically insulating surfaces like silicon carbide, and the scotch tape method [21]. All of these methods can produce highly crystalline graphene but are not suitable for mass production [22, 23]. Several researchers have attempted to propose environmentally friendly and green approach including flash photo reduction [24] hydrothermal dehydration [22], solvothermal reduction [23], and catalytic [25] and photocatalytic reduction [26]. The most promising method for the large-scale production of graphene is the chemical oxidation of graphite, conversion of the resulting graphite oxide to GO, and subsequent reduction of GO. The exfoliation of GO is one of the well-established methods for the mass production of graphene in the presence of some chemical reducing

agents such as hydrazine and sodium borohydride [27, 28]. The usage of strong chemical reducing see more agents such as hydrazine is found to be corrosive, highly

Ribose-5-phosphate isomerase explosive, and highly toxic [29]. In addition, hydrazine seems to be a hepatotoxic and carcinogenic agent in the kidney, and liver damage can result in blood abnormalities, irreversible deterioration of the nervous system, and even DNA damage [30]. In this context, many studies used the green chemistry approach for the reduction of GO to overcome the toxicity problem using various biological molecules as reducing agents such as vitamin C [31], melatonin [32], sugars [33], polyphenols of green tea [34, 35], bovine serum albumin [36], and biomass of bacteria [37, 38]. The biologically derived graphene nanomaterials are biocompatible, stable, and soluble. Biocompatibility is an essential factor for tissue engineering applications. Recent studies suggest that the biocompatibility of carbon-based nanomaterials depends strongly on mass, purity, ratio, and surface functional groups. A variety of biological applications depend on the functionalization of graphene. The ability of the functionalization of graphene and its derivatives brought the attention of nanomaterials in various applications including biosensors and tissue engineering. Several studies have reported the biocompatibility of graphene derivatives in proximity of mammalian cells. Biris et al.

e CFSElow, T cells ± SD Discussion

e. CFSElow, T cells ± SD. Discussion ��-Nicotinamide in vitro Due to a growing body of knowledge about immunosurveillance – and loss thereof – anti-tumor immunotherapy has been refined [32]. Nevertheless, especially results of APC-based tumor vaccination trials often have often not met the high expectations. Lack of efficacy mainly originates from well-defined tumor escape mechanisms [2, 3, 33]. Tolerizing conditions of the tumor environment are mainly driven by tumor or bystander cell derived cytokines inducing tolerogenic DC, e.g. by triggering myeloid DC B7-H1 expression [34], and by recruitment of regulatory T cells [35], myeloid-derived

suppressor cells (MDSCs) and mesenchymal stroma cells (MSCs) [36]. IL-10, TGF-β, and VEGF all have PF01367338 been identified as key factors that mediate the inhibitory action of the tumor microenvironment. Their serum levels are frequently increased in cancer patients

and the tumor tissues of many cancer types are enriched for these immunosuppressive factors [37–39]. The main activity of IL-10 is related to downregulation of T cell function, which occurs predominantly through indirect mechanisms involving APCs [40]. IL-10 has been shown to impair antigen-presentation by DCs through reduction of the cell surface expression of adhesion and costimulatory molecules as well as MHC class II. Furthermore, IL-10 promotes DC apoptosis and inhibits DC migration to the secondary lymphoid organs [41, 42]. Ureohydrolase DCs isolated from transgenic mice that over-express IL-10 have a defect in antigen presentation and decreased capacity to induce T cell activation. Conversely, in IL-10-deficient tumor-bearing mice the defect in DC function was reversed [43]. As

a consequence IL-10-conditioned DCs are tolerogenic and induce T cell anergy [6, 44]. Like IL-10 TGF-β prevents the trafficking of DCs to the lymph nodes [45]. In addition, TGF-β impairs the maturation of DCs and thereby leads to the accumulation of immature DCs with the ability to generate regulatory T cells [8, 46]. VEGF also inhibits DC maturation leading to an accumulation of immature DCs with impaired APC function within the tumor microenvironment and the tumor-draining lymph nodes [9]. Consequently, inhibition of TGF-β, IL-10, or VEGF signaling improves DC function and enhances the efficacy of tumor vaccines [47–49]. Another strategy to address these tumor escape mechanisms in cellular tumor vaccinations is the use of alternative APC sources. In this context human CD40-activated B cells have gained increasing interest. We and others have previously shown that CD40-activated B cells are equipped with a profile of chemokine receptors that are required for the homing to the secondary lymphoid organs [31]. Furthermore, CD40-activated B cells are FRAX597 nmr potent antigen-presenting cells and are able to prime both CD4+ and CD8+ T cells in vitro.

AO performed the immunohistochemical staining CW gave technical

AO performed the immunohistochemical staining. CW gave technical assistance. GM designed the study, examined histological and immunohistochemical staining, and reviewed the manuscript. All the authors have read and approved the final manuscript.”
“Background Non alcoholic fatty liver disease (NAFLD) involves a spectrum of conditions ranging from simple fat accumulation in the liver to end stage liver failure and cirrhosis. NAFLD can lead into the development of non alcoholic steatohepatitis

(NASH) [1]. NASH is an emerging health concern and it is believed that its prevalence is on the rise due to escalating obesity rates [2]. Estimated NAFLD prevalence in Western countries is between 17-33% [3]. NAFLD accounts for up to 20%, and NASH find more accounts for 2-3% of liver test abnormalities in most developed countries [4]. NASH is typically reported in obese individuals suffering from one

or a combination of type 2 diabetes, insulin resistance and CB-839 ic50 dyslipidaemia, but is not restricted to this group [2]. There is often an increase in aspartate aminotransferase (AST) and alanine aminotransferase (ALT) [5]. Lipid accumulation occurs early in NASH as part of the development of the disease [6]. The two hit disease model postulates that steatosis is a trigger for the establishment of NASH and the increased levels of fat infiltration cause damage to the liver by forming fat droplets within the hepatic tissue, thus setting off the second hit of

the disease by causing lipotoxicity. In addition, cytokines and learn more reactive oxygen species (ROS) create a pro-oxidant state that can activate stellate cells to produce fibrotic scar tissue [7]. Liver fatty acid binding protein (LFABP) accounts for 3-5% of the cytosolic protein content in hepatocytes. N-acetylglucosamine-1-phosphate transferase LFABP is transcriptionaly regulated by the nuclear hormone receptor, peroxisome proliferator-activated protein α (PPAR-α), and is responsible for intracellular trafficking of long chain fatty acids [8]. Rat LFABP has recently been described as an endogenous antioxidant [9], and may be useful in states of extreme oxidative stress when intracellular antioxidants such as superoxide dismutase, glutathione and catalase cannot quench excessive quantities of ROS. This antioxidant characteristic of LFABP is thought to result from the methionine groups located in the cavity of the LFABP binding site [9]. NADPH oxidase (NOX), an enzyme complex responsible for generating superoxide, is activated in rat Kupffer cells in alcoholic liver disease, through induction of transcription factor NF-κβ and TNF-α production [10]. However, administration of a methionine choline deficient (MCD) diet to p47 knockout mice, lacking a critical subunit of the NOX complex, showed that NOX is not an important contributor of oxidative stress generation. The p47 knockout mice on an MCD diet developed NASH with similar pathology as wild type, despite the lack of a functional NOX enzyme [11].

Therefore, we decided to investigate the anatomy of the pelvic or

Therefore, we decided to investigate the anatomy of the pelvic organs of a group of human female foetuses, collected at autopsy. Methods We collected at autopsy 36 human female fetuses at different gestational ages, that did not displayed any visible alteration of the pelvic organs. The

characteristics of the fetuses are depicted in Table 1. Pelvic organs were collected en-block, fixed in paraphormaldeyde and included in paraffin. We performed histological analysis of the pelvic organs for each fetus, using Hematoxylin/Eosin and Hematoxylin/Van Gieson staining. For immunohistochemistry 5–7 μm specimen sections embedded in paraffin, were cut, mounted on glass and selleckchem dried overnight at 37°C. All sections were then deparaffinized in xylene, rehydrated through a graded alcohol series and washed in phosphate-buffered Savolitinib datasheet saline (PBS). PBS was used for all subsequent

washes and for antiserum dilution. AZD8931 concentration Tissue sections were quenched sequentially in 3% hydrogen peroxide in aqueous solution and blocked with PBS-6% non-fat dry milk (Biorad, Hercules, CA, U.S.A.) for 1 h at room temperature. Slides were then incubated at 4°C overnight at 1:100 dilution with the following antibodies: the affinity-purified rabbit antibody ERα for the oestrogen receptor (Santa Cruz, Santa Cruz, CA, USA; cat. # sc-542) and the mouse monoclonal antibody M11 for CA125(Dako Laboratories, Carpinteria, CA, USA).

After three washes in PBS to remove the excess of antiserum, the slides were incubated with Alectinib diluted goat anti-rabbit or anti-mouse biotinylated antibodies (Vector Laboratories, Burlingame, CA, U.S.A.) at 1:200 dilution in PBS-3% non-fat dry milk (Biorad) for 1 h. All the slides were then processed by the ABC method (Vector Laboratories) for 30 min at room temperature. Diaminobenzidine (Vector Laboratories) was used as the final chromogen and haematoxylin was used as the nuclear counterstaining. Negative controls for each tissue section were prepared by leaving out the primary antiserum. Positive controls constituted of tumour tissues expressing either the oestrogen receptor or CA125, were run at the same time. All samples were processed under the same conditions.

“Review Background Strongly correlated-electron materials,

“Review Background Strongly correlated-electron materials, such as the rare-earth PLX3397 order perovskite oxide manganites having a general formula R1-x AxMnO3, where R is a trivalent rare-earth element (e.g., La, Pr, Sm) and A is a divalent alkaline-earth element such as Ca, Sr, and Ba, have been attracting much attention because of their unusual electron-transport and magnetic properties, e.g., colossal magnetoresistance (CMR) effect [1–3], a sharp metal-insulator transition

(MIT) as a function of temperature, electric field, magnetic field, light, hydrostatic pressure, strain, etc. [4–6]. Such MIT is also accompanied by a paramagnetic to ferromagnetic transition as the temperature is lowered. The competition selleck between several interactions in the rare-earth perovskite oxide manganites makes that only small energy differences exist between

the different possible phases of the system. As a result, the phase of the material can be tuned by various external perturbations, such as magnetic and electric fields, strain, and disorder. These perturbations may lead to the CMR effect and can be used for electronic phase control in manganite devices. Recently, there is strong experimental evidence to indicate that the rare-earth perovskite oxide manganites are electronically inhomogeneous, which consist of different spatial regions with different electronic orders [7–10], a phenomenon that is named as electronic phase separation (EPS). As an inherent electronic inhomogeneity, BEZ235 purchase EPS has been widely reported in the rare-earth perovskite oxide manganites, and its size varies from nano to mesoscopic scales [11–15]. It has been recognized to be crucial for the CMR effect and the MIT in manganites, leading to the new applications of spintronics [9]. However, the presence of EPS raises many intriguing questions, e.g., what is the microscopic nature of the EPS? Why does it have such a large range of length scales from nanometers to

micrometers? More importantly, is it responsible for the related physical properties such as CMR and high-Tc superconducting exhibited by Molecular motor the manganites and related oxide materials? Therefore, EPS is getting recognized as a phenomenon of importance in understanding the magnetic and electron transport properties of perovskite oxide manganites [16, 17]. Recent advances in science and technology of perovskite oxide manganites have resulted in the feature sizes of the microelectronic devices based on perovskite oxide manganites entering into nanoscale dimensions. At nanoscale, perovskite oxide manganites exhibit a pronounced size effect manifesting itself in a significant deviation of the properties of low-dimensional structures from their bulk and film counterparts.

The risk of enterotomy can be reduced if meticulous care is taken

The risk of enterotomy can be reduced if meticulous care is taken in the use of atraumatic graspers only and if the manipulation of friable, distended bowel is minimized by handling the mesentery of the bowel whenever possible [74]. In fact to handle dilated and edematous bowel during adhesiolysis is dangerous and the risk increases with a long lasting obstruction; this is the reason why early operation is advisable as one multicenter study showed: the success rate for early laparoscopic intervention for acute SBO is significantly higher after a shorter duration

of symptoms (24 h vs 48 h) [75]. After trocar placement, the initial goal is to this website expose the collapsed distal bowel [74]. This is facilitated with the use of angled telescopes and maximal tilting/rotating of the surgical table. It may also be necessary to move the laparoscope to different trocars to improve visualization. Only pathologic adhesions should be lysed. Additional adhesiolysis only adds to the operative time and to the risks of surgery without benefit. The area lysed should be thoroughly inspected AZD5363 solubility dmso for possible bleeding and bowel injury. In AP26113 purchase conclusion, careful selection criteria for laparoscopy [76] may

be: (1) Hemodynamic stability and patient not in shock, (2) absence of peritonitis or severe intra-abdominal sepsis, (3) proximal i.e. SB obstruction, (4) localized distension on radiography, and/or (5) absence of severe abdominal distension, (6) anticipated single band, (7) low or intermediate predicted PAI score in < = 3 abdominal quadrants, and last but not least (8) the experience and laparoscopic skills of the surgeon. A partial obstruction is better first approached with a non-operative challenge with hyperosmolar water soluble contrast medium with both therapeutic and diagnostic purposes. A complete SB obstruction

should no longer be considered an exclusion criteria for laparoscopic approach. The experts panel also agreed, as from the cited studies, that laparoscopic lysis of adhesions should be attempted preferably in case of first episode of SBO and/or anticipated single band adhesion (i.e. SBO after appendectomy or hysterectomy). Previous midline incision is MTMR9 not an absolute exclusion criteria for laparoscopic approach. A multicenter series of 103 patients from the WSES – Iitalian Working Group on peritoneal adhesions and ASBO management, presented at the 2013 Clinical Congress of American College of Surgeons [77], described a safe and effective surgical technique for laparoscopic approach to ASBO and confirmed that laparoscopy should be attempted preferably in case of first episode of SBO and/or anticipated single band adhesion (i.e. SBO after appendectomy or hysterectomy).

This response is typical of the telomere deprotection occurring d

This response is typical of the telomere deprotection occurring during cellular senescence Alpelisib or upon the loss of telomeric proteins [34–40]. The ability of G-quadruplex ligands

to uncap telomeres and to possess anti-tumor activity has been already described for other agents, [41–45] reinforcing the notion that these agents can act as inhibitors of a telomere-related process and therefore the rationale for the development of this class of inhibitors as anti-tumor agents must be found elsewhere other than in higher telomerase expression in cancer cells. Taken collectively our results clearly demonstrate that compounds 2 (but less efficiently 3) rapidly disrupt telomere architecture of cells, by delocalizing the telomeric protein POT1, resulting in a potent DNA damage response characterized by the formation of several telomeric foci. Furthermore, it is apparent that the 2-substitued Gemcitabine in vivo quinoacridinium salt 2 more closely mimics the overall pharmaceutical profile of the prototypic compound 1 than the regioisomer 3. Our recent synthetic work has therefore focused on the 2-substituted series and our efforts

to maximize on-target and minimize off-target properties will be reported separately. Conclusions Molecular modification of quinoacridinum salts 1 have shown to reduce undesired cardiotoxic effects while maintaining the on-target features as telomere targeting agents. This findings provide a strong rational for development of this class of compounds

as tools for a G-quadruplex targeted anti-cancer therapy. Electronic supplementary material Additional file 1: Cytotoxicity of 2 and 3 and SPR sensorgrams. (PDF 281 KB) References 1. Hanahan D, Weinberg RA: The hallmarks of cancer. Cell 2000, 100:57–70.PubMedCrossRef 2. Testorelli C: Telomerase and cancer. J Exp Clin Cancer Res 2003, 22:165–169.PubMed 3. Cech TR: Beginning to understand the end of the chromosome. Cell 2004, 116:273–279.PubMedCrossRef 4. Phan AT, Kuryavyi V, Patel DJ: DNA architecture: from G to Z. Curr Opin Struct Biol 2006, 16:288–298.PubMedCrossRef Tolmetin 5. Huppert JL, Subramanian S: Prevalence of quadruplexes in the human genome. Nucleic Acids Res 2005, 33:2908–2916.PubMedCrossRef 6. Garner TP, Williams HEL, Gluszyk KI, Roe S, KU55933 nmr Oldham NJ, Stevens MF, Moses JE, Searle MS: Selectivity of small molecule ligands for parallel and anti-parallel G-quadruplex structures. Org Biomol Chem 2009, 7:4194–4200.PubMedCrossRef 7. Akiyama M, Hideshima T, Munshi NC, Anderson KC: Telomerase inhibitors as anticancer therapy. Curr Med Chem Anticancer Agents 2002, 5:567–575.CrossRef 8. Lai XF, Shen CX, Wen Z, Qian YH, Yu CS, Wang JQ, Zhong PN, Wang HL: PinX1 regulation of telomerase activity and apoptosis in nasopharyngeal carcinoma cells. J Exp Clin Cancer Res 2012, 31:12.PubMedCrossRef 9. Yingying L, Junchao G, Dachuan J, Yanjing G, Mengbiao Y: Inhibition of telomerase activity by HDV ribozyme in cancers.