Sst2 tumor suppressor activity relies on

Sst2 tumor suppressor activity relies on Doramapimod datasheet an autocrine loop whereby its natural ligand somatostatin is secreted by sst2-expressing cells resulting in constitutive sst2 activation. However, molecular mechanisms TH-302 datasheet responsible for sst2-dependent inhibition of invasiveness

are unknown. The a6b4 integrin plays a critical role in epithelia integrity: its presence in hemidesmosal structures (HDs) at the basal cell surface links the intracellular intermediate filament network to the extracellular laminins of the basement membrane. Interestingly, HDs are frequently absent in cancer cells, whereas the a6b4 integrin (mostly its β4 subunit) is overexpressed in several cancers, including pancreatic, and contributes to carcinoma invasiveness by stimulating cell migration. This is partly achieved through a6b4 integrin delocalization into lamellipodia and filopodia. We have demonstrated that somatostatin, Ilomastat cost by acting through sst2, can revert a6b4 integrin delocalization to migration structures, an hallmark of epithelial cancer cells, by forcing its relocalization to HDs, thereby stabilizing epithelial cell anchorage to basement membrane and inhibiting cell migration. Underlying molecular

mechanisms are here shown to rely on a sst2-dependent up-regulation of HDs protein expression, including BP180. Strikingly, knocking-down BP180 expression (siRNA) impairs somatostatin-induced HDs assembly in sst2-expressing cells. Interestingly, BP180 siRNA partially reverts sst2 inhibitory 17-DMAG (Alvespimycin) HCl role on in vitro and in vivo cell migration and invasion, as demonstrated using the chick chorioallatoic membrane model whereby tumor progression of pancreatic

cancer cell xenografts is monitored. We have identified an original mechanism for sst2 to revert cancer cell pro-migratory phenotype by relocalizing the a6b4 integrin to HDs thereby facilitating hemidesmosome assembly and cancer cell anchorage to basement membrane. O85 Anti-JAM-C Tumor Growth Inhibition Occurs through Modulation of Thrombomodulin Expressing Stromal Cells Vincent Frontera 1 , Marie-Laure Arcangeli1, Claudia Zimmerli2, Florence Bardin1, Elodie Obrados1, Stephane Audebert1, Beat Imhof2, Jean Paul Borg1, Michel Aurrand-Lions1 1 Université de la méditerrannée institut poali calmettes, Inserm U891, Marseille, France, 2 Department of Pathology and Immunology, Centre Médical Universitaire, Geneva, Switzerland The Junctional Adhesion Molecule-C (JAM-C) has been identified as an adhesion molecule highly expressed by lymphatic sinuses of lymph nodes, mesenchymal and endothelial cells 1.

FEMS Microbiology Letters 2006,258(1):102–107 PubMedCrossRef 18

FEMS Microbiology Letters 2006,258(1):102–107.PubMedCrossRef 18. Ochiai N, Tokai T, Takahashi-Ando N, Fujimura M, Kimura M: Genetically engineered Fusarium as a tool to evaluate the effects of environmental factors on initiation of trichothecene biosynthesis. FEMS Microbiology Letters 2007,275(1):53–61.PubMedCrossRef 19. Ponts N, Pinson-Gadais L, Barreau

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PubMedCrossRef 59 Hayashi Y, Jacob-Vadakot S, Dugan EA, McBride

PubMedCrossRef 59. Hayashi Y, Jacob-Vadakot S, Dugan EA, McBride S, Olexa R, Simansky K, Murray M, Shumsky JS: 5-HT precursor loading, but not 5-HT click here receptor agonists, increases motor function after spinal cord contusion in adult rats. Exp Neurol 2010, 221:68–78.PubMedCrossRef 60. Yamamoto T, Newsholme Selleckchem Luminespib EA: Diminished central fatigue by inhibition of the L-system transporter for the uptake of tryptophan. Brain Res Bull 2000, 52:35–38.PubMedCrossRef 61. Heckman MA, Weil J, Gonzalez de Mejia E: Caffeine (1, 3, 7-trimethylxanthine) in foods: a comprehensive review

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Muñoz-Guerra J: Effects of a Caffeine-Containing Energy Drink on Simulated Soccer Performance. PLoS One 2012, 7:e31380.PubMedCrossRef 65. Del Coso J, Salinero JJ, Gonzalez-Millan C, Abian-Vicen J, Perez-Gonzalez B: Dose response effects of a caffeine-containing energy drink on muscle performance: a repeated measures design. J Int Soc Sports Nutr 2012, 9:21.PubMedCrossRef 66. Berube-Parent S, Pelletier C, Dore J, Tremblay A: Effects of encapsulated green tea and Guarana extracts containing a mixture of epigallocatechin-3-gallate and caffeine on 24 h energy expenditure and fat oxidation in men. Br J Nutr 2005, 94:432–436.PubMedCrossRef 67. Belza A, Toubro S, Astrup A: The effect of caffeine, green tea

and tyrosine on thermogenesis and energy intake. Eur J Clin Nutr 2009, 63:57–64.PubMedCrossRef 68. Eichenberger Parvulin P, Colombani PC, Mettler S: Effects of 3-week consumption of green tea extracts on whole-body metabolism during cycling exercise in endurance-trained men. Int J Vitam Nutr Res 2009, 79:24–33.PubMedCrossRef 69. Venables MC, Hulston CJ, Cox HR, Jeukendrup AE: Green tea extract ingestion, fat oxidation, and glucose tolerance in healthy humans. Am J Clin Nutr 2008, 87:778–784.PubMed 70. Eichenberger P, Mettler S, Arnold M, Colombani PC: No Effects of Three-week Consumption of a Green Tea Extract on Time Trial Performance in Endurance-trained Men. Int J Vitam Nutr Res 2010, 80:54–64.PubMedCrossRef 71. Chen N, Bezzina R, Hinch E, Lewandowski PA, Cameron-Smith D, Mathai ML, Jois M, Sinclair AJ, Begg DP, Wark JD, et al.: Green tea, black tea, and epigallocatechin modify body composition, improve glucose tolerance, and differentially alter metabolic gene expression in rats fed a high-fat diet. Nutr Res 2009, 29:784–793.PubMedCrossRef 72.

2009) Tests for antibodies after the

2009). Tests for antibodies after the infection or ILS were not performed in order to confirm the pH1N1 infection. This might have resulted in false positive or false negative results. However, this should have led to non-differential misclassification and dilution of the preventive effect of pH1N1 vaccination. Therefore, the vaccine effectiveness observed in our study is unlikely to be overestimated. Side effects of the pH1N1 vaccination were directly observed during the first hour after vaccination. It should be noted that information on other side effects was based on informal reports to the vaccination desk and

a semi-standardised survey either in person or over the phone. Therefore, underestimation of the incidence of side effects selleck chemical after pH1N1 vaccination is possible but not likely to introduce a significant bias. Conclusions Vaccine effectiveness seemed buy RG-7388 to be high in HCWs during the influenza A H1N1 season 2009/2010. The pandemic plan to contain pandemic influenza A H1N1,

with its various methods, was successful. The use of vaccines significantly reduced the expected number of illnesses. Nurses had the highest risk of pH1N1 infection and are therefore a target group for vaccination measures. Acknowledgments We would like to thank the HCWs who participated in this study. No funds were received for this study. Conflict of interest The authors declare that Adenosine triphosphate they have no conflict of interest. Open Access This article is distributed under the terms of the Creative Commons Attribution Noncommercial License which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author(s) and source are credited. References Amodio E, Anastasi G, Marsala MG, Torregrossa MV, Romano N, Firenze A (2011) Vaccination against the 2009 pandemic influenza A (H1N1) among healthcare workers in the major teaching hospital of Sicily (Italy). Vaccine 29(7):1408–1412CrossRef Brammer L, Blanton L, Epperson S et

al (2011) Surveillance for influenza during the 2009 influenza A (H1N1) pandemic-United States, April 2009–March 2010. Clin Infect Dis 52(Suppl 1):S27–S35 Ellis J, Iturriza M, Allen R et al (2009) Evaluation of four real-time PCR assays for detection of influenza A (H1N1) virus. Euro Surveill 14(22) Farrington CP (1993) Estimation of vaccine effectiveness using the screening method. Int J Epidemiol 22(4):742–746CrossRef Garten RJ, Davis CT, Russell CA et al (2009) Antigenic and genetic characteristics of swine-origin 2009 A (H1N1) influenza viruses circulating in humans. Science 325:197–201CrossRef General Directorate of Health (2009) Vaccination campaign against the pandemic influenza (H1N1) 2009 infection. Information bulletin no. 17, 14 October 2009 (Direcção-Geral da Saúde (2009) Campanha de vacinação GDC-0068 cost contra a infecção pelo vírus da gripe pandémica (H1N1).

14 Overall HRd 0 91 0 83, 1 01 0 95 0 81, 1 11 0 95 0 85, 1 06  

14 Overall HRd 0.91 0.83, 1.01 0.95 0.81, 1.11 0.95 0.85, 1.06         aWomen using personal calcium or vitamin D supplements at baseline in the CaD trial are excluded bSignificance level (P value) for test of no HR trend across years from CaD initiation categories, coded as 0, 1, 2, respectively cOverall HR in the OS divided by that in the CaD trial. This ratio

is used as a residual confounding bias correction factor in the OS, in combined trial and cohort study analyses dOverall find more HR is the hazard ratio estimate when the HR is assumed not to depend on years from CaD initiation In women not taking supplements at baseline, the HR for hip fracture in the CT following 5 or more years of CaD supplementation versus placebo was 0.62 (95 % CI, 0.38 to 1.00). In combined analyses of CT and OS data (with residual confounding provision in the OS), the corresponding HR was 0.65 (95 % CI, 0.44 to 0.98) with evidence (P = 0.02) of HR trend with time from calcium and vitamin D initiation. Thus, there was evidence for lower hip fracture rates check details following some years of calcium plus vitamin D use in the subset of women not taking personal calcium or vitamin D supplements. This risk reduction was suggestive, but not clearly evident in the trial cohort as a whole (HR 0.82; 95 % CI, 0.61 to 1.12), or in combined trial and OS analyses. These combined overall CT

and OS analyses provide some evidence for hip fracture benefit in the 5 or more years category (HR 0.78; 95 % CI, 0.59 to 1.03). Total fracture showed little evidence for association with CaD supplementation, with HRs from the OS tending to be larger than those from the CT. To help interpret the hip fracture HRs, it can be noted that the FFQ 5th, 25th, 50th, 75th, and 95th percentiles for dietary calcium (milligram Methamphetamine per day) were 291, 512, 738, 1,043, and 1,650, and for dietary vitamin D

(IU/day), and were 47, 96, 149, 221, and 397 in the CT. Corresponding percentiles in the OS were 291, 571, 748, 1,074, and 1,693 for calcium, and 43, 93, 147, 225, and 407 for vitamin D, very similar to those in the CT. It is evident that personal supplement use of 500 mg/day or more calcium and 400 IU/day or more of vitamin D contributes a substantial fraction to the total consumption of these Rigosertib cost nutrients in study cohorts. Table 2 also shows that total mortality was somewhat reduced in the first 2 years from randomization among women assigned to active treatment in the CT. This pattern was not evident in later years of follow-up, in corresponding OS analyses, or in combined CT and OS analyses. Table 3 provides corresponding analyses for cardiovascular diseases. There was little evidence for an adverse influence of CaD supplementation on the risk for MI, CHD, total heart disease, stroke, or total cardiovascular disease, from either the CT or OS, or from their combined analysis. In fact, the OS data alone suggest a reduction in total heart disease risk and total cardiovascular disease risk among supplement users.

Both treatments contained benzalkonium chloride 0 01 % Beginning

Both treatments contained benzalkonium chloride 0.01 %. Beginning at the first visit

(Visit 1, Day 1), subjects instilled one drop of study treatment in the infected eye(s) three times daily at approximately 6-h intervals, continuing through Day 7. If patients with conjunctivitis in only one eye developed an infection in the other (fellow) eye during the study treatment period, the subject was instructed to begin using their study treatment in that eye as well. All study treatments were collected at visit 2 (Day 8). Subjects were asked to complete diary records of study treatment instillation, and medication bottles were also weighed to assess compliance. The investigators, subjects, and all other study personnel involved in the monitoring or conduct of the study were masked to the treatment received. MK-1775 Cultures of the cul de sac of infected eyes were taken QNZ price at each visit, before any treatment was instilled. Subjects were considered culture confirmed https://www.selleckchem.com/products/dorsomorphin-2hcl.html if the colony count (in CFU/mL) equaled or exceeded the threshold value on the Cagle list, as modified by Leibowitz [16]. On this list the threshold is high for species commonly found in healthy subjects’ eyes (e.g., ≥1,000 CFU/mL for corynebacteria, ≥100 CFU/mL for S. epidermidis), but low for species that are usually not encountered (e.g., ≥1 CFU/mL for Pseudomonas

aeruginosa), thereby reducing the likelihood of characterizing an infection as culture-confirmed due to the presence of commensal bacteria. Only one eye from each subject was designated as the study eye. Study eye determinations were made as follows: For subjects PRKACG with exactly one treated eye having at least one pathogenic ocular

bacterial species at or above threshold at baseline and the minimum required conjunctival discharge and bulbar conjunctival injection at baseline, the study eye was defined as that eye. For subjects with both treated eyes having at least one accepted ocular bacterial pathogen at or above threshold at baseline and the required conjunctival discharge and bulbar conjunctival injection at baseline, the study eye was defined as the treated eye with the highest combined severity of conjunctival discharge and bulbar conjunctival injection at baseline. If that combined severity was the same for both eyes, the right eye was considered the study eye. For subjects whose treated eye(s) did not have at least one accepted ocular bacterial species at or above threshold at baseline, the study eye was defined as the eye with the highest severity of conjunctival discharge and bulbar conjunctival injection at baseline, out of the treated eyes with the required conjunctival discharge and bulbar conjunctival injection at baseline. If the severity was the same for both eyes, the right eye was considered the study eye. 2.2 Outcomes Study outcomes were assessed on Day 8 (or +1 day; Visit 2) and Day 11 (±1 day; Visit 3). 2.2.

Their research focused on characterization of the radioactive ele

Their research focused on characterization of the radioactive elements formed during uranium fission. During that time, Gest also signed a petition drafted by fellow scientist Leo Szilard urging President Harry Truman to demonstrate the power of the bomb to the world and give Japan an opportunity to surrender before it was used. When World War II ended, Gest completed graduate work (Ph.D. 1949) at Washington University in St. Louis as the first student of Martin Kamen, a pioneer nuclear chemist renowned as the co-discoverer of carbon 14. During this MK-4827 nmr period, Gest also did research with Alfred

Hershey on the fate of radioactive phosphorus during the multiplication of bacterial viruses. That work culminated in the discovery of “P-32 suicide” of bacteriophage. The remainder of his scientific

career was focused on microbial physiology and metabolism with photosynthetic bacteria where he was widely recognized for his contributions to this field. In the 1970s, Gest and co-workers undertook some of the first genetic studies on photosynthetic bacteria and in the 1980s he isolated several new genera of photosynthetic bacteria, including Heliobacterium chlorum that represented the first example of a photosynthetic spore forming Gram-positive bacterium. This contribution that was recognized by a scientific colleague who named a new species in this genera Heliobacterium gestii. In the years following his retirement from laboratory research, Gest focused on the history of science, with particular emphasis

MK 1775 Bacterial neuraminidase on the under-appreciated contributions of the English scientist Robert Hooke, with respect to microscopy and other aspects of microbiology. Gest was also a frequent contributor to Microbe and other journals, often criticizing what he considered to be the current over-reliance on molecular methodologies to the exclusion of classical microbiology and cultivation-based techniques. He remained an active, independent, and insightful scholar of microbiology and the practice of science in general, right up to his passing. During a remarkable 70-year scientific career, Gest published more than 300 papers and books including co-editing the 1,RAD001 in vivo 300-page “Discoveries in Photosynthesis” (2006) that was described by Current Science as “easily among the most outstanding and valuable books published in the biological sciences in the last 100 years.” Reference Govindjee, Beatty, JT, Gest H, Allen JF (eds) (2006) Discoveries in Photosynthesis. In: Advances in photosynthesis and respiration, vol 20. Springer Press, Berlin”
“David, the son of Cyril and Dorothy Walker, was born in Hull, England. He attended the South Shields Boys High School (now Harton Technology College) from 1939 to 1946.

This study was conducted to determine whether betaine is a compon

This study was conducted to determine whether betaine is a component GS1101 of sweat that may be lost from the body during exercise. Methods Subjects Eight trained female Scottish Highland dancers (10-17 yr) were recruited from the Stirling Highland Dance Company, Oakdale CT. The subjects trained regularly, and were actively competing in dance competitions. Subjects attended a briefing meeting before any experimentation

to ensure an understanding of the testing parameters and the benefits/risks of the study. The subjects and parents signed a written informed consent statement. The study was part of the Somers High School (SHS) Science Research Program and the protocol was approved by the SHS IRB. Experimental Protocol Sweat patches were prepared by placing two 2″” × 2″” gauze squares onto 4″” × 4.5″” adhesive film. Care was taken to minimize any cross-contamination. New disposable latex gloves were utilized for each subject. The

skin on the lower back of the subjects was cleaned with gauze and distilled water, dried, and two patches were placed on both sides of the spine. The dancers then conducted a 2 hour class. The sweat patches were removed, placed in plastic 6-ml centrifuge tubes and stored on ice prior to centrifugation. The tubes were spun for 2 min at 1315 g in a benchtop centrifuge (Model 0151; Clay Adams, Parsippany, NJ). The patches were removed from the tubes, and the sweat (1-2 ml) at the bottom of the tubes was recovered. Each subject had two tubes from the two patches. The see more sweat from the two tubes was combined and stored frozen at -20°C prior to analysis. Measurements Betaine, choline, and choline metabolites were determined in duplicate by liquid chromatography/electrospray ionization-isotope dilution mass spectrometry [22]. Lactate and glucose were determined in duplicate by enzymatic techniques (YSI 2300 Stat Plus, Yellow Springs, OH). Sodium, potassium and chloride were measured in duplicate using ion selective electrodes (Medica Easy Electrolytes, Medica Corp., Bedford,

MA). Urea and ammonia were Sodium butyrate measured using a COBAS Mira Plus Analyzer (Roche Diagnostics, Indianapolis, IN) and Pointe Scientific (Canton, MI) reagent sets and standards. Instruments were calibrated using NIST certified standards. Statistics Grubbs’ test http://​graphpad.​com/​quickcalcs/​Grubbs1.​cfm was used to determine outliers in data sets (alpha = 0.05). Pearson’s selleck chemicals llc correlation test (SigmaPlot v11, Systat Software Inc, San Jose, CA) and Passing-Bablok regression analysis (MedCalc, Mariakerke, Belgium) were conducted to compare data sets. Results The measures of sweat composition are shown in Table 1. Phosphatidylcholine and sphingomyelin were also measured, but were not detected (data not shown). The mean betaine content was 232 ± 84 μmol·L-1. The other components of sweat were found at levels similar to that of previous studies [18, 19, 21].

† represents p < 0 05 difference from baseline * represents p < 

Univariate MANOVA analysis revealed some small time buy XMU-MP-1 effects in chloride levels (p = 0.008) and a trend toward an interaction in potassium levels (p = 0.08) but the small changes observed would have no clinical significance. Likewise, no significant interactions were observed among groups in white blood cell count (WBC, p = 0.45), red blood cell count (RBC, p = 0.64), hematocrit (p = 0.65), hemoglobin (p = 0.59), mean corpuscular volume (MCV, p = 0.56), mean corpuscular hemoglobin C59 wnt concentration (MCH, p = 0.44), mean corpuscular hemoglobin concentration (MCHC, p = 0.68), red blood cell distribution width (RBCDW, p = 0.92), or platelet count (p = 0.48). Table 12 Serum electrolyte status Marker N Group Day   p-level       0 7 28     Sodium (mmol/L) 11 KA-L 140.1 ± 2.3 139.9 ± 1.1 140.0 ± 1.3 Group 0.98   12 KA-H 139.9 ± 2.3 139.7 ± 2.4 140.3 ± 2.1 Time 0.28   12 CrM

140.8 ± 2.1 139.3 ± 1.4 139.7 ± 1.6 G x T 0.57 Potassium (mmol/L) 11 KA-L 4.54 ± 0.3 4.86 ± 0.4 4.82 ± 0.3 Group 0.65   12 KA-H 4.89 ± 0.5 4.71 ± 0.6 5.00 ± 0.3 Time 0.11   12 CrM 4.74 ± 0.4 GBA3 4.93 ± 0.4 4.81 ± 0.4 G x T 0.08 Chloride (mmol/L) 11 KA-L 103.3 ± 2.2 103.0 ± 2.4 103.8 ± 1.9 Selleck MEK162 Group 0.21   12 KA-H 102.4 ± 2.2 101.5 ± 2.2 102.6 ± 2.4 Time 0.008   12 CrM 104.3 ± 2.2 102.3 ± 1.7

103.1 ± 1.8 G x T 0.21 Values are means ± standard deviations. Data were analyzed by MANOVA with repeated measures. Greenhouse-Geisser time and group x time (G x T) interaction p-levels are reported with univariate group p-levels. Table 13 Whole blood markers Marker N Group Day   p-level       0 7 28     WBC (x103/ul) 9 KA-L 5.73 ± 0.6 6.13 ± 0.5 6.17 ± 1.5 Group 0.95   12 KA-H 5.83 ± 1.1 5.76 ± 0.9 6.36 ± 1.1 Time 0.16   12 CrM 5.97 ± 1.2 5.73 ± 1.0 5.98 ± 1.2 G x T 0.45 RBC (x106/ul) 9 KA-L 5.44 ± 0.4 5.38 ± 0.5 5.44 ± 0.3 Group 0.28   12 KA-H 5.10 ± 0.4 5.18 ± 0.3 5.23 ± 0.3 Time 0.91   12 CrM 5.42 ± 0.5 5.41 ± 0.5 5.35 ± 0.7 G x T 0.64 Hematocrit (%) 9 KA-L 48.4 ± 3.4 47.9 ± 4.3 48.1 ± 2.9 Group 0.17   12 KA-H 46.5 ± 3.2 47.0 ± 2.8 47.4 ± 1.8 Time 0.96   12 CrM 45.9 ± 2.3 46.1 ± 2.5 45.2 ± 5.4 G x T 0.65 Hemoglobin (g/dl) 9 KA-L 16.0 ± 1.6 16.0 ± 1.6 16.0 ± 1.2 Group 0.21   12 KA-H 15.2 ± 1.2 15.7 ± 1.0 15.6 ± 0.7 Time 0.60   12 CrM 15.1 ± 0.9 15.2 ± 1.1 14.9 ± 2.0 G x T 0.62 MCV (fL) 9 KA-L 89.0 ± 2.8 88.9 ± 2.9 88.3 ± 2.8 Group 0.10   12 KA-H 91.1 ± 3.5 90.8 ± 3.1 90.7 ± 3.6 Time 0.03   12 CrM 85.4 ± 9.2 85.7 ± 9.5 85.0 ± 9.1 G x T 0.56 MCH (pg/cell) 9 KA-L 29.4 ± 1.5 29.6 ± 1.2 29.3 ± 1.2 Group 0.

Figure 4 Growth of strains in Middlebrook 7H9 broth Duplicate lo

Figure 4 Growth of strains in Middlebrook 7H9 broth. Duplicate log phase cultures of each strain were normalised to an O.D. of 0.05 and cultured with shaking Selleck FK228 with the O.D. repeated at intervals. No difference in the maximum rate of growth of the strains was observed. Cytokine secretion Human monocytes were infected with equal numbers of bacilli (moi 1:1) and co-cultured for 72 hours. During this period, the median secretion of IL-1β was significantly reduced by deletion of the 19 kDa gene (Figure 5A, p = 0.02). Introduction of the native

19 kDa gene as Δ19::19 restored secretion to wild type levels but the response to Δ19::19NA and Δ19::19NOG remained significantly less when compared to Δ19::19 (p = 0.031 in both cases). There was no difference between H37Rv, Δ19 and Δ19::19 in their ability to elicit IL-12p40 or TNF from monocytes (Figure 5B and 5C). Although the response to both the Δ19::19NA and Δ19::19NOG strains tended to be lower, these differences were also not significantly different from H37Rv. Figure 5 Secretion Thiazovivin of IL-1β, IL-12p40 and TNF in response to strains of M. tuberculosis. Monocytes from 7 donors were infected with strains and co-cultured for 72 hours. The median secretion of IL-1β was significantly reduced by deletion of the 19 kDa gene (p = 0.02). Introduction of the native 19 kDa gene as Δ19::19 restored secretion to wild type levels but the response to Δ19::19NA and Δ19::19NOG remained significantly

less when compared to Δ19::19 (p = 0.031 in both cases). No differences existed between strains in their ability to induce the secretion of IL-12p40 or TNF. Induction of apoptosis Culture supernatants from 6

donors were also assayed for the presence of Histone associated DNA fragments, a BAY 80-6946 mouse marker of apoptosis. Results for each subject were normalised to unstimulated cells to generate an enrichment factor. The Δ19 and Δ19::19NA and Δ19::19NOG were associated with lower levels than H37Rv or the Δ19::19 strain. However responses varied considerably between donors and none of these trends attained statistical significance (Figure 6). Figure 6 Induction of apoptosis by strains of M. tuberculosis. Monocytes from 6 donors were infected with strains and co-cultured Tyrosine-protein kinase BLK for 72 hours. Apoptosis was determined by ELISA for nucleosomal fractions in culture supernatants. Results for each subject were normalised to unstimulated cells to generate an enrichment factor. The mean + SD of this enrichment factor is shown. Although the Δ19 strain tended to induce less apoptosis than H37Rv and Δ19::19 none of the differences were statistically significant. Discussion We have investigated deletion of the 19 kDa lipoprotein (Rv3763) from M. tuberculosis and chromosomal complementation of the deletion mutant by the wild type gene and site directed mutagenised variants lacking motifs for acylation and O-glycosylation. We have determined that both acylation and O-glycosylation are necessary for the protein to remain within the cell.