“In patients

with type 2 diabetes mellitus (T2DM),

“In patients

with type 2 diabetes mellitus (T2DM), the physiologic glucagon-like peptide-1 (GLP-1) response, which is involved in glucose regulation through several mechanisms, is dysfunctional. GLP-1 receptor agonists can fill an unmet therapeutic need in the treatment of T2DM: improving glycemic control without increasing the risk of hypoglycemia (except with concomitant sulfonylureas) and reducing weight in a substantial proportion of patients. GLP-1 receptor agonists have impacted established disease treatment algorithms for T2DM. For example, in 2009 the American Diabetes Association and European Association for the Study of Diabetes revised their consensus treatment algorithm to incorporate GLP-1 receptor agonists. GLP-1 receptor 4SC-202 agonists were originally represented by exenatide BID (ExBID), a short-acting agent requiring twice-daily injections at meal-time. The longer-acting agent liraglutide, requiring once-daily injections, recently received regulatory approval. Several other long-acting agents are in clinical development, selleck chemicals one of which is the once-weekly formulation of exenatide (exenatide once weekly [ExQW]). This article reviews the clinical

development of ExQW in the DURATION program. Patients in theses clinical trials were receiving various background treatments, ranging from lifestyle therapy to combination oral therapy, although the majority

(68%) received metformin monotherapy. Specifically, safety, glycemic control, and weight were compared in patients treated with ExQW versus ExBID, sitagliptin, pioglitazone, or insulin glargine. Moreover, measures of beta-cell function, cardiovascular risk, inflammation, and hepatic health were investigated. During ExQW clinical development, consistent clinical efficacy (glycosylated hemoglobin, -1.5% to -1.9%; weight, -2kg to -4 kg) and safety data were observed in patients with T2DM treated with ExQW.”
“The influence of strain on the thermally induced dewetting mechanism selleck inhibitor of silicon films is reported. This study shows that the initial strain level in the silicon film significantly affects the final size and shape of the silicon agglomerates resulting from the film dewetting. With the increase of the biaxial strain up to 1.6%, the size of the silicon agglomerates is significantly reduced while their density increases. Moreover, the shape of the agglomerates becomes elongated when the strain favors one of the in-plane crystallographic directions to minimize the total energy of the system. A quantitative analysis of the dewetting mechanism is presented in terms of the agglomerates size and density versus the strain level. Finally, phenomenological laws are extracted, which predict the size and shape of the agglomerates. (C) 2013 AIP Publishing LLC.

This review discusses the efficacy of the AIs in improving DDFS i

This review discusses the efficacy of the AIs in improving DDFS in the different adjuvant settings and explores whether significant improvements in DDFS correlate with meaningful improvements in OS or breast cancer-associated mortality. Significant DDFS improvement may be a learn more quicker, better end point in clinical trials, leading to a more efficient, faster assessment of treatment efficacy.”
“Two strains of Arcobacter butzleri, ATCC 49616 and an

environmental isolate, became nonculturable in seawater microcosms at 4 C by 20 days and at room temperature by 14 days. Nonculturable cells were viable for up to 270 days of incubation in microcosms. Resuscitation of A. butzleri cells from microcosms at both temperatures was achieved 9 days after nutrient addition.”
“For the efficient stimulation of T cells by tumor Ag, tumor-derived material has to be presented by dendritic cells (DC). This very likely involves the uptake of dead tumor cells by DC. Cell death in tumors often occurs through

apoptosis, but necrotic cell death may also be prevalent. This distinction is relevant because numerous studies have proposed that apoptotic cells have immunosuppressive effects while necrosis may be stimulatory. However, a system has been lacking that would allow the induction of apoptosis or necrosis without side effects by the death stimuli used experimentally. In this study, we present such a system

and test its effects on immune cells in vitro. B16 mouse melanoma cells MK-8931 nmr were generated and underwent cell death through the doxycycline-inducible induction of death proteins. In one cell line, the induction of Bim(S), induced rapid apoptosis, in the other line the induction of the FADD death domain induced nonapoptotic/necrotic cell death. Bim(S)-induced apoptosis was associated with the typical morphological and biochemical changes. FADD death domain induced necrosis occurred through a distinct pathway involving RIP1 and the loss of membrane integrity in the absence of apoptotic changes. Apoptotic and necrotic cells were taken up with comparable efficiency by DC. OVA expressed in cells dying by either apoptosis or necrosis was cross-presented to OT-1 T cells and induced their PD-1/PD-L1 inhibitor drugs proliferation. These results argue that it is not the form of cell death but its circumstances that decide the question whether cell death leads to a productive T cell response. The Journal of Immunology, 2009, 182: 4538-4546.”
“Objectives: We investigated the outcomes of reinforcing anastomotic sites using (1) non biodegradable polytetrafluoroethylene (PTFE) felt, (2) biodegradable polyglycolic acid (PGA) felt, and (3) PGA felt with basic fibroblast growth factor (bFGF) in a canine descending thoracic aortic replacement model.

Here, we show that the majority of early uptake does not occur th

Here, we show that the majority of early uptake does not occur through caveolae. alpha 2 beta 1 integrin, clustered by antibodies or by EV1 binding, is initially internalized from lipid ASP2215 ic50 rafts into tubulovesicular structures. These vesicles accumulate fluid-phase markers but do not initially colocalize with caveolin-1 or internalized simian virus 40 (SV40). Furthermore, the internalized endosomes

do not contain glycosylphosphatidylinositol (GPI)-anchored proteins or flotillin 1, suggesting that clustered alpha 2 beta 1 integrin does not enter the GPI-anchored protein enriched endosomal compartment or flotillin pathways, respectively. Endosomes mature further into larger multivesicular bodies between 15 min to 2 h and concomitantly recruit caveolin-1 or SV40 inside. Cell entry is regulated by p21-activated kinase (Pak) 1, Rac1, phosphatidylinositol 3-kinase, phospholipase C, and actin but not learn more by dynamin 2 in SAOS-alpha 2 beta 1 cells. An amiloride analog, 5-(N-ethyl-N-isopropanyl) amiloride, blocks infection, causes integrin accumulation in early tubulovesicular structures, and prevents their structural maturation into multivesicular structures. Our results together suggest that

alpha 2 beta 1 integrin clustering defines its own entry pathway that is Pak1 dependent but clathrin and caveolin independent and that is able to sort cargo to caveosomes.”
“Background: Folate plays a pivotal role in DNA synthesis, repair, methylation and homocysteine (Hcy) metabolism. Therefore, alterations in the folate-mediated one-carbon metabolism may lead to abnormal methylation proliferation, increases of tumor/neoplasia and vein thrombosis/cardiovascular risk. The serine hydroxymethyhransferase (SHMT), methionine synthase (MS), methionine synthase reductase (MTRR) and cystathionine beta synthase (CBS) regulate key reactions

in the folate Small Molecule Compound Library and Hcy metabolism. Therefore, we investigated whether the genetic variants of the SHMT, MS, MTRR and CBS gene can affect plasma Hcy levels and are associated with breast cancer risk.\n\nMethods: Genotyping was performed by PCR-RFLP method. Plasma Hcy levels were measured by the fluorescence polarization immunoassay on samples of 96 cases and 85 controls.\n\nResults: (a) The SHMT 1420 T, MS 2756G, MTRR 66G allele frequency distribution showed significant difference between case and controls (p < 0.01 similar to 0.05). (b) The concentration of plasma Hcy levels of SHMT 1420TT was significantly lower than that of the wild type, while the plasma Hcy levels of MS 2756GG, CBS 699TT/1080TT significantly higher than that of the wild type both in case and controls. The plasma Hcy levels of MTRR 66GG was significantly higher than that of wild type in cases.

This study aimed tot assess the long-term effect of galantamine o

This study aimed tot assess the long-term effect of galantamine on weight of AD patients.\n\nThis longitudinal study was performed

at a large memory clinic in the North of the Netherlands. During the period 2002 to 2010, 303 communitydwelling AD patients, aged 65 years or older who started using a cholinesterase inhibitor (CER), were included.\n\nSocio-demographic characteristics and data on comorbidity, number of medications, type and dosage of CER, use of care, cognitive function, behaviour and nutritional status (weight, Body Mass Index (BMI)) were recorded at the time the diagnosis AD was made and at subsequent outpatient PKC412 clinic visits. The Generalized Estimating Equations (GEE) model was used to determine the effect of galantamine of 16 mg and 24 mg on weight. The effect of galantamine in a dose of 16 and 24 mg was investigated because the other groups (rivastigmine, galantamine 8 mg) were too small to determine the effect on weight by GEE analysis. Donepezil is not available in the Netherlands.\n\nThe median follow-up time between the moment patients started using a CER (T0) and the 1st visit was 6 months (n=300); between T0 and the

2nd visit 13 months (n=212); between T0 and the 3rd visit 25 months (n=117) and between T0 and the 4th visit 37 months (n=58). Galantamine 16 mg and 24 mg, corrected for age, gender, social status, Selleck Linsitinib informal care, professional care, comorbidity, number of medications, cognition, behaviour and appetite, had no effect on weight (p > 0.05). Male patients had a higher average weight compared to female

patients (p=0.000, B=8.333). Patients without an informal caregiver (p=0.01, B=-3.697) or partner (p=0.042, B=-3.197) had a lower average weight compared to patients with an informal caregiver or partner.\n\nWeight loss BMS-777607 order in AD patients should not be attributed to long-term treatment with galantamine. This is in accordance with the French guideline. If AD patients are losing weight, other causes, including insufficient care, should be investigated.”
“Objective: Avidly phagocytosed hemozoin (malarial pigment) alters several functions of human monocytes and stimulates generation of several cytokines. Recently, we showed that phagocytosis of hemozoin by human monocytes increases expression and activity of matrix metalloproteinase-9, a proteolytic enzyme available in specific gelatinase granules, which contain several enzymes including lysozyme. Present work investigated active lysozyme release after phagocytosis of hemozoin and its dependence on production of tumor necrosis factor alpha.

1mg/g furosemide Besides, to approve deafness DPOAE resulted can

1mg/g furosemide. Besides, to approve deafness DPOAE resulted can be used.”
“The aim of this study was to characterize ir-IGF-I pattern and its relation to other hormones during the oestrous cycle in mares. Nine non-pregnant non-lactating pluriparous thoroughbred mares were used. The studied mares were examined ultrasonically and bled Selonsertib Apoptosis inhibitor daily to follow the ovarian changes and the hormonal milieu for a complete Interovulatory interval (IOI). Two (minor and major) follicular waves were characterized per IOI in thoroughbred mares. The largest follicle of the first follicular wave (DF1) was firstly

detected at D 1.75 +/- 0.47 with a growth rate of 2.78 +/- 0.14 mm/day and maximum diameter of 22.45 +/- 0.75 mm on day 6.65 +/- 0.82. The largest follicle of the second follicular wave (DF2)

had a growth rate of 2.15 +/- 0.29 mm/day, reached a maximum diameter of 42.70 +/- 2.63 mm on D 19.25 +/- 0.43. Ir-IGF-I increased significantly prior to ovulation and had a similar pattern to oestrogen (r = 0.84, p < 0.05), suggesting that the ovarian follicles are the main source of circulating ir-IGF-I during the oestrous cycle of mares and that ir-IGF-I may be AZD8931 price a crucial factor in follicular differentiation and maturation. In conclusion, this study demonstrated that ir-IGF-I is secreted during the oestrous phase of the cycle concomitant with the development of the future ovulatory dominant follicle, and it may act in synergy with other hormones for the selection and differentiation of the dominant follicle.”
“Oral Diseases (2012) 18, 580585 Objectives: Osteonecrosis of the jaw (ONJ) is a major complication associated with long-term use of bisphosphonates (BP). We aimed to investigate the effect of CYP2C8 rs1934951 SNP and its relationship to a number of clinical and biochemical factors in 46 Hungarian subjects with bisphosphonate-induced ONJ. Methods:

Combretastatin A4 Cytoskeletal Signaling inhibitor Blood samples were collected from each subject and genomic DNA was extracted. SNP analysis of CYP2C8 gene was carried out by predesigned TaqMan primer/probe sets. The genetic data together with clinical and biochemical variables were evaluated by chi-square test, logistic regression, and principal component analysis (PCA). Results: The risk of mandibular localization of ONJ was 19.2-fold higher in subjects with AG genotype than in normal GG genotype. PCA revealed strong positive correlations between maxillar localization of ONJ and a group of variables including intravenous BP application and serum lipid markers. Mandibular localization of ONJ was correlated positively with serum calcium, 25-hydroxy-vitamin D and PTH levels, oral BP application, and the length of BP therapy. The degree of the disease and the number of recurrences were correlated with the application of hormone-deprivation therapy for breast cancer patients.

The brain stimulation treatment protocol used is called Neuro Psy

The brain stimulation treatment protocol used is called Neuro Psycho Physical Optimization (NPPO) with a Radio Electric Asymmetric Conveyer (REAC) device.

Methods: Psychological stress and PPD were measured for a group of 888 subjects using the Psychological Stress Measure (PSM) test, a self-administered questionnaire. Data were collected immediately before and after the 4-weeks of REAC treatment cycle.

Results: This study showed a significant reduction in scores measuring subjective perceptions NCT-501 of stress

for subjects treated with a cycle of NPPO REAC treatment. At the end-point the number of subjects reporting symptoms of stress-related PPD on the PSM test was significantly reduced, whereas in the placebo group the difference was not


Conclusion: A cycle of NPPO treatment with REAC was shown to reduce subjective perceptions of stress measured by the PSM test and in particular on PPD.”
“Past increases in yield potential of wheat have largely resulted from improvements in harvest index rather than increased biomass. Further large increases in harvest index are unlikely, but an opportunity see more exists for increasing productive biomass and harvestable grain. Photosynthetic capacity and efficiency are bottlenecks to raising productivity and there is strong evidence that increasing photosynthesis will increase crop yields provided that other constraints do not become limiting. Even small increases in the rate of net photosynthesis can translate into large increases in biomass and hence yield, since carbon assimilation is integrated over the entire growing season and crop canopy. This review discusses the strategies to increase photosynthesis that are being proposed by the wheat yield consortium in order to increase wheat yields. These include: selection for photosynthetic capacity and efficiency, increasing ear photosynthesis, optimizing canopy photosynthesis, introducing chloroplast CO(2) pumps, increasing RuBP regeneration, improving the thermal

stability of Rubisco activase, and replacing wheat Rubisco with that from other species with different kinetic properties.”
“A plasticizer, polyethylene 3-Methyladenine mouse glycol ( PEG), was used to disperse multiwalled carbon nanotubes (MWCNTs) in biodegradable poly(L-lactide) during one-step melt mixing. Incorporation of PEG significantly promotes the formation of a percolating MWCNT network in the plasticized composites, as revealed by rheological measurements and morphological observations. It, in turn, results in the retarded glass transition and cold crystallization behaviors in these plasticized composites as a result of constrained chain relaxation. It is believed that noncovalent wrapping of MWCNTs by PEG is responsible for the improved affinity between MWCNTs and the poly(L-lactide) matrix. (C) 2011 Wiley Periodicals, Inc.

(C) 2011 Elsevier

Masson SAS All rights reserved “

(C) 2011 Elsevier

Masson SAS. All rights reserved.”
“The development of lab-on-chip devices is expected to dramatically change biochemical analyses, allowing for a notable increase of processing quality and throughput, provided the induced chemical reactions are well controlled. In this work, we investigate the impact of local acoustic mixing to promote or accelerate such biochemical reactions, such as antibody grafting on activated surfaces. During microarray building, the spotting mode leads to low efficiency in the ligand grafting and heterogeneities which limits its performances. To improve the transfer rate, we induce a hydrodynamic flow in the spotted droplet to disrupt find more the steady state during antibody grafting. To prove that acoustic mixing increases the antibody transfer rate to the biochip surface, we have used a Love-wave sensor allowing for real-time monitoring of the biological reaction for different operating conditions (with or without mixing). An analysis of the impact of the proposed mixing on grafting kinetics is proposed and finally

checked in the case of antibody-antigen combination. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3576113]“
“Background: In Switzerland 5% to 10% of hospitalized adults acquire nosocomial infections (NI) but few data are available in children. Most former studies on NI in hospitalized children analyzed specific units or pathogens and neglected the postdischarge period. We aimed to prospectively assess viral NI occurring during and shortly after hospitalization in children.

Methods: Prospective MLN4924 surveillance was performed during a 24-month period. Electronic standardized questionnaires were completed for

each patient by physicians during hospital stay. On a ward-based rotational VX-680 mouse schedule, follow-up information was obtained from a subset of patients 1 week after hospital discharge. NI were defined using CDC recommendations.

Results: Overall, 6250 patients (34,608 patient hospitalization days, PHD) were enrolled and 1272 patients were recruited for postdischarge surveillance. Mean hospitalization duration was 5 days. Fifty-two (0.8%) patients acquired 54 viral NI during hospitalization and 12 patients (1.1%) acquired 12 viral NI after hospital discharge (NI incidence: 1.9 per 1000 PHD including follow-up period). NI rate in infants was higher compared with children >12 months old (2.0% vs. 0.8%; P < 0.05) and the infant ward also had the highest incidence (4.0 NI per 1000 PHD). Most NI were gastrointestinal tract infections with 55% caused by rotavirus infection. NI rates were highest between November and March.

Conclusions: A significant part of NI will only be detected if surveillance includes the immediate postdischarge period. Given the strong seasonality of pediatric NI, intensifying hygiene measurements particularly on infant wards and prior to the cold season would be beneficial in reducing NI incidence.

meningitidis serogroups C and Y “
“Liver cancer (LC) is gene

meningitidis serogroups C and Y.”
“Liver cancer (LC) is generally characterized by malignant cell proliferation

and growth; it normally develops in stages that progress from non-specific injury of the liver to liver fibrosis, liver cirrhosis, dysplasia nodules, and liver carcinoma. We used a rat model of selleck products diethylnitrosamine (DENA)-induced LC; a Rat Genome 230 2.0 Array was used to detect gene expression profile of liver tissues from male rats 5, 8, 12, 16, and 18 weeks following the beginning of DENA-induced LC. We found 909 known genes, including 637 up-regulated, 270 down-regulated, and two up/down-regulated genes, that were significantly changed in expression. Among them, 108 genes were expressed at the 5th, 213 at the 8th, 516 at the 12th, 698 at the 16th, and 506 at the 18th week of DENA-induced LC. Methods in bioinformatics and systems biology were applied to explore the correlation between the gene expression profile of rat liver tissue and liver cancer occurrence at the transcriptional level; 23 physiological activities were found

to be associated with CH5424802 LC. Among these, eight physiological activities, including stimulus response, inflammation and immune response, oxidative reduction, cell proliferation, differentiation, migration, adhesion, and angiogenesis were increased, implying that they could play important roles in the occurrence and development of LC. In addition, carbohydrate, lipid, and organic acid metabolism were decreased, suggesting that liver injury induced by a carcinogenic agent has a negative effect on the metabolism of fundamental substances.”
“We study the effect of electron beam irradiation

on the bending modulus of multiwall carbon nanotubes grown by chemical vapor deposition. Atomic force microscopy observations of the nanotube deflection in the suspended-beam geometry suggest an internal, reversible stick-slip motion prior to irradiation, indicating presence of extended defects. Upon electron beam irradiation, nanotubes with an initial bending modulus exceeding 10 GPa initially get stiffer, before softening at high doses. Highly defective nanotubes with smaller initial bending moduli do not exhibit the initial reinforcement. These data are explained by ab initio molecular dynamics calculations suggesting BIX 01294 price a spontaneous cross-linking of neighboring nanotube walls at extended vacancy defects created by the electron beam, in agreement with electron microscopy observations. At low defect concentration, depending on the edge morphology, the covalent bonds between neighboring nanotube walls cause reinforcement by resisting relative motion of neighboring walls. At high concentration of defects that are present initially or induced by high electron beam dose, the structural integrity of the entire system suffers from increasing electron beam damage. (C) 2010 American Institute of Physics. [doi:10.1063/1.

It is revealed that the cells made of certain nondirect crystal c

It is revealed that the cells made of certain nondirect crystal cuts provide several times better AO diffraction efficiency comparing to

the traditional C59 Wnt ic50 ones, i.e., made of direct cuts of LiNbO(3). The obtained results present considerable practical interest since may be useful in a designing of highly efficient AO cells made of LiNbO(3) crystals. The methodology developed in the present work may be applied to other crystal materials as well. (C) 2010 American Institute of Physics. [doi:10.1063/1.3510518]“
“Hepatitis C virus (HCV) is a widespread chronic infection that shares routes of transmission with human immunodeficiency virus (HIV). Thus, coinfection with these viruses is a relatively common and growing problem. In general, liver disease develops over years with HIV coinfection, when compared to decades in HCV monoinfection. The role of the immune system in the accelerated pathogenesis of liver disease in HIV/HCV coinfection is not clear. In this study, we compared the frequency, magnitude, breadth and specificity of peripheral blood CD4+ and CD8+ T-cell responses check details between HCV-monoinfected and HCV/HIV-coinfected individuals and between HIV/HCV-coinfected subgroups distinguished by anti-HCV

antibody and HCV RNA status. While HIV coinfection tended to reduce the frequency and breadth of anti-HCV CD8+ T-cell responses in general, responses that were present were substantially stronger than in monoinfection. In all groups, HCV-specific CD4+ T-cell responses were rare and weak, independent of either nadir or concurrent CD4+ T-cell counts of HIV-infected individuals. Subgroup analysis demonstrated restricted breadth of CD8+ HCV-specific T-cell responses and lower B-cell counts in HIV/HCV-coinfected individuals without anti-HCV antibodies. The greatest difference DMH1 inhibitor between HIV/HCV-coinfected and HCV-monoinfected groups was substantially stronger HCV-specific CD8+ T-cell responses in the HIV-coinfected group, which may relate to accelerated liver disease in this setting.”
“We conducted,

in four languages, the first national cross-sectional survey of the knowledge, attitudes, and practice with respect to epilepsy of Chinese- and Vietnamese-American adults We used a convenience sampling method to recruit 2831 adults in seven states Eighty-four percent had heard or read of epilepsy and 58% had seen a seizure, whereas only 34% knew someone with epilepsy Forty-two percent would object to their children marrying a person with epilepsy, and 43% would not knowingly hire someone with epilepsy. We examined bivariate associations for questions of knowledge. attitudes. and practice with age, gender. ethnicity. nativity, language, and education chi(2) analyses showed differences in knowledge of and attitudes toward epilepsy by age group, gender, ethnicity, and education Although misconceptions and negative views about epilepsy are held by Chinese and Vietnamese populations living in the United States.

Materials and Methods: Animal studies were approved by the Instit

Materials and Methods: Animal studies were approved by the Institutional Administrative Panel on Laboratory Vactosertib price Animal Care. A heterodimeric peptide that binds to human KDR with low nanomolar affinity

(K(D) = 0.5 nmol/L) was coupled onto the surface of perfluorobutane-containing lipid-shelled MBs (MB(KDR)). Binding specificity of MB(KDR) to human KDR and cross-reactivity with murine vascular endothelial growth factor (VEGF) receptor 2 (VEGFR2) were tested in cell culture under flow shear stress conditions (at 100 sec 2 1). In vivo binding specificity of MB(KDR) to VEGFR2 was tested in human LS174T colon cancer xenografts in mice with a 40-MHz ultrasonographic (US) transducer. Targeted contrast material-enhanced US imaging signal by using MB(KDR) was longitudinally measured during 6 days in tumors with (n = 6) and without (n = 6) antiangiogenic treatment (anti-VEGF antibody). Ex vivo VEGFR2 staining and microvessel density analysis were performed. Significant differences were Selleck Birinapant evaluated (t, Mann-Whitney, or Wilcoxon test).

Results: Cell

culture experiments showed four times greater binding specificity of MB(KDR) to human KDR and cross-reactivity to murine VEGFR2 (P <= .01). In vivo imaging signal was more than three times higher (P = .01) with MB(KDR) compared with control MBs and decreased significantly (approximately fourfold lower, P = .03) following in vivo receptor blocking with anti-VEGFR2 antibody. One day after initiation of antiangiogenic therapy, imaging signal was significantly decreased (approximately 46% lower, P = .02) in treated versus untreated tumors; it remained significantly lower (range, 46%-84% decreased; P = .038) during the following 5 days. Microvessel density was significantly reduced (P = .04) in treated (mean, 7.3 microvessels Sapanisertib per square millimeter +/- 4.7 [standard deviation]) versus untreated tumors (mean, 22.0 microvessels per square millimeter 6 9.4); VEGFR2 expression was significantly decreased (>50% lower, P = .03) in treated tumors.

Conclusion: Human MB(KDR) allow

in vivo imaging and longitudinal monitoring of VEGFR2 expression in human colon cancer xenografts. (C) RSNA, 2010″
“A network analyzer connected to a high pressure vessel was used to measure the conductance spectrum in a wide range of frequency (1-250 MHz) of an AT-cut quartz crystal resonator of nominal frequency 3 and 5 MHz totally immersed in a fluid under pressure ranging from atmospheric pressure to 80 MPa. Measurements carried out with several gases (methane, nitrogen, argon, carbon dioxide) and various hydrocarbon liquids (toluene, heptane, nonane, decane, dodecane) show that quartz resonators correctly work when they are fully immersed in pressurized fluids whatever the state gas or liquid and whatever the pressure.