Critical Care 2017, 21(Suppl 1):P349 Introduction Imbalance in cellular energetics has been suggested to be an important mechanism for organ failure in sepsis and septic shock. We hypothesized that such energy imbalance would either be caused by metabolic changes leading to decreased energy production or by increased energy consumption. Thus, we set out to investigate if mitochondrial dysfunction or decreased energy consumption alters cellular metabolism in muscle tissue in experimental sepsis. Methods We submitted anesthetized piglets to sepsis (n = 12) or placebo (n = 4) and monitored them for 3 hours. Plasma lactate and markers of organ failure were measured hourly, as was muscle metabolism by microdialysis. Energy consumption was intervened locally by infusing ouabain through one microdialysis catheter to block major energy expenditure of the cells, by inhibiting the major energy consuming enzyme, N+/K + -ATPase. Similarly, energy production was blocked infusing sodium cyanide (NaCN), in a different region, to block the cytochrome oxidase in muscle tissue mitochondria. Results All animals submitted to sepsis fulfilled sepsis criteria as defined in Sepsis-3, whereas no animals in the placebo group did. Muscle glucose decreased during sepsis independently of N+/K + -ATPase or cytochrome oxidase blockade. Muscle lactate did not increase during sepsis in naïve metabolism. However, during cytochrome oxidase blockade, there was an increase in muscle lactate that was further accentuated during sepsis. Muscle pyruvate did not decrease during sepsis in naïve metabolism. During cytochrome oxidase blockade, there was a decrease in muscle pyruvate, independently of sepsis. Lactate to pyruvate ratio increased during sepsis and was further accentuated during cytochrome oxidase blockade. Muscle glycerol increased during sepsis and decreased slightly without sepsis regardless of N+/K + -ATPase or cytochrome oxidase blocking. There were no significant changes in muscle glutamate or urea during sepsis in absence/presence of N+/K + -ATPase or cytochrome oxidase blockade. ConclusionsThese results indicate increased metabolism of energy substrates in muscle tissue in experimental sepsis. Our results do not indicate presence of energy depletion or mitochondrial dysfunction in muscle and should similar physiologic situation be present in other tissues, other mechanisms of organ failure must be considered. , and long-term follow up has shown increased fracture risk [2]. It is unclear if these changes are a consequence of acute critical illness, or reduced activity afterwards. Bone health assessment during critical illness is challenging, and direct bone strength measurement is not possible. We used a rodent sepsis model to test the hypothesis that critical illness causes early reduction in bone strength and changes in bone architecture. Methods 20 Sprague-Dawley rats (350 ± 15.8g) were anesthetised and randomised to receive cecal ligation and puncture (CLP) (50% cecum length, 18G needle single pass through anterior and posterior wa...

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Background PTCL is an aggressive subgroup of NHL. Outcomes in R/R PTCL remain poor and alternative therapies are needed. Alisertib is an investigational, oral, selective inhibitor of Aurora A kinase, a key mitotic regulator that is overexpressed/amplified in various cancers, including lymphomas. Phase 2 data with single-agent alisertib in R/R NHL (Friedberg et al JCO 2014) and R/R PTCL (Barr et al JCO 2015) suggested promising antitumor activity. This international phase 3 trial evaluated single-agent alisertib vs investigator's choice in pts with R/R PTCL, and was the first initiated randomized trial in this setting. Methods Adult pts with R/R PTCL (WHO criteria) after ≥1 prior conventional systemic cytotoxic therapy, who had measurable disease by 2007 IWG criteria, tumor biopsy for central hematopathology review, and ECOG PS 0-2, were eligible. Pts were randomized 1:1 (stratified by nodal vs extranodal disease, IPI score [0/1/2 vs 3/4/5], and region [North America + EU vs Rest of World]) to receive alisertib 50 mg twice daily as an enteric coated tablet on d 1-7 in 21-d cycles (alisertib arm), or investigator's choice of: pralatrexate 30 mg/m2 IV once weekly for 6 weeks in 7-week cycles; romidepsin 14 mg/m2 IV on d 1, 8, and 15 in 28-d cycles; or gemcitabine 1000 mg/m2 IV on d 1, 8, and 15 in 28-d cycles (comparator arm), until disease progression, unacceptable toxicity, or 2 yrs (extendable if benefit shown). Selected comparator drug could not have been previously received by the pt, and crossover to another study drug was not permitted. The primary endpoints were ORR (CR+PR) and PFS by IWG criteria per central (IRC) assessment. Secondary endpoints included OS, CR rate, DOR, and safety. The study employed an adaptive sample size reassessment approach, with two interim analyses (IA1, futility analysis; IA2) plus a planned final analysis. Sample size was determined to give 80% power to detect a difference in ORR (assumed 55% alisertib vs 30% comparator) at IA2, and ~85% power to detect a reduction in HR for PFS in favor of alisertib at the final analysis with a maximum of 354 randomized pts and a maximum of 261 PFS events. Conditional power calculation based on PFS at IA2 could determine whether the study would be stopped for futility or if sample size would be expanded for the final analysis. Here we report data from IA2 (17Sep2014 data cut-off). Results 238 pts were randomized across 27 countries (120 alisertib, 118 comparator). Baseline characteristics were balanced between arms (alisertib vs comparator): median age 63 vs 64 yrs; male 68% vs 64%; Ann Arbor stage III/IV 74% vs 72%; bone marrow involvement at study entry 29% vs 35%. Efficacy data are shown in the Table. ORR by IRC with alisertib vs comparator was 33% vs 43% (OR 0.65 [95% CI: 0.34-1.23]), including 16% vs 25% CR. Median duration of follow-up was 9.5 vs 9.2 mos with alisertib vs comparator. Median PFS by IRC was 3.7 vs 3.4 mos (HR 0.939 [95% CI: 0.681-1.293]; Figure) and median OS was 9.9 vs 12.2 mos (HR 0.901 [95% CI: 0.607-1.337]; OS data not mature at current follow-up). Median treatment duration with alisertib vs comparator was 12 vs 10 weeks and 15% vs 5% of pts remained on treatment at data cut-off. With alisertib vs comparator, rates of Gr ≥3 AEs were 85% vs 81%, serious AEs 53% vs 55%, discontinuations due to AEs 9% vs 13%, and on-study treatment-related deaths 2% vs 2%. Gr ≥3 AEs (>20% all pts) were neutropenia 44% vs 27%, thrombocytopenia 29% vs 27%, and anemia 30% vs 11%. Conclusion While alisertib showed activity in R/R PTCL, there was no significant efficacy benefit vs comparator. Based on IA2, there was a low probability of claiming superiority of alisertib for PFS at the final analysis; therefore, per IDMC recommendation enrollment was stopped at 271 pts and pts deriving benefit continue on treatment. The study was unblinded and final data are pending. Table. Efficacy Alisertib Comparator All Pralatrexate Romidepsin Gemcitabine Response, n (%)*† n=83 n=80 n=40 n=17 n=23 ORR (CR+PR) 27 ( 33) 34 (43) 16 (40) 10 (59) 8 (35) CR 13 (16) 20 (25) 10 (25) 5 (29) 5 (22) PR 14 (17) 14 (18) 6 (15) 5 (29) 3 (13) SD 26 (31) 18 (23) 13 (33) 2 (12) 3 (13) PD 30 (36) 27 (34) 11 (28) 4 (24) 12 (52) Median DOR*† (responders), mos 5.0 5.8 - - - PFS*‡ n=120 n=118 n=67 n=21 n=30 Events, n (%) 78 (65) 73 (62) 45 (67) 7 (33) 21 (70) Median, mos 3.7 3.4 3.4 8.0 1.9 *IRC assessment †Response-evaluable pts (n=163); n=75 not evaluable (not dosed/ no post-baseline IRC assessment/ no central confirmation of PTCL) ‡ITT analysis (n=238) Disclosures O'Connor: Spectrum: Research Funding; Seattle Genetics: Research Funding; Takeda Pharmaceutical Company Limited: Research Funding. Off Label Use: Investigational Aurora A kinase inhibitor, alisertib, for patients with relapsed/refractory peripheral T-cell lymphoma.. Demeter:Amgen: Membership on an entity's Board of Directors or advisory committees; Novartis: Membership on an entity's Board of Directors or advisory committees; Roche: Membership on an entity's Board of Directors or advisory committees; BMS: Membership on an entity's Board of Directors or advisory committees. Masszi:BMS: Membership on an entity's Board of Directors or advisory committees; Novartis: Membership on an entity's Board of Directors or advisory committees; Janssen-Cilag: Membership on an entity's Board of Directors or advisory committees; Takeda: Membership on an entity's Board of Directors or advisory committees. Ramchandren:Kite Pharma: Membership on an entity's Board of Directors or advisory committees, Speakers Bureau; Seattle Genetics: Membership on an entity's Board of Directors or advisory committees, Research Funding, Speakers Bureau; Pharmacyclics: Research Funding. d'Amore:Takeda Pharmaceutical Company Limited: Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding, Speakers Bureau. Foss:Celgene: Membership on an entity's Board of Directors or advisory committees, Speakers Bureau; Millennium Pharmaceuticals, Inc., a wholly owned subsidiary of Takeda Pharmaceutical Company Limited: Membership on an entity's Board of Directors or advisory committees; Spectrum: Membership on an entity's Board of Directors or advisory committees; Seattle Genetics: Membership on an entity's Board of Directors or advisory committees, Speakers Bureau. Kim:Merck: Research Funding; Takeda: Research Funding; Novartis: Research Funding; Kyowa-Kirin: Research Funding; Donga: Research Funding; Roche: Research Funding. Zinzani:J&J: Membership on an entity's Board of Directors or advisory committees, Speakers Bureau; Pfizer: Membership on an entity's Board of Directors or advisory committees, Speakers Bureau; Gilead: Membership on an entity's Board of Directors or advisory committees, Speakers Bureau; Celgene: Membership on an entity's Board of Directors or advisory committees, Speakers Bureau; Takeda: Membership on an entity's Board of Directors or advisory committees, Speakers Bureau. Liu:Millennium Pharmaceuticals Inc., a wholly owned subsidiary of Takeda Pharmaceutical Company Limited: Employment. Jung:Millennium Pharmaceuticals Inc., a wholly owned subsidiary of Takeda Pharmaceutical Company Limited: Employment. Zhou:Millennium Pharmaceuticals Inc., a wholly owned subsidiary of Takeda Pharmaceutical Company Limited: Employment. Leonard:Millennium Pharmaceuticals Inc., a wholly owned subsidiary of Takeda Pharmaceutical Company Limited: Employment. Dansky Ullmann:Millennium Pharmaceuticals Inc., a wholly owned subsidiary of Takeda Pharmaceutical Company Limited: Employment. Shustov:Seattle Genetics: Research Funding.

Serviço de Hematologia e Hemoterapia do HC-FM-USP, São Paulo. Correspondência: Renata Bizzetto Rua Matias Aires nº 300, 9440-9935 E-mail: rbizzetto@hotmail.com Revisão / ReviewIntrodução O LPSNC é um linfoma extralinfonodal raro que, por definição, ao diagnóstico, encontra-se restrito ao parênquima cerebral, à meninge e/ou medula espinhal e/ou olhos.1 Após ter sua incidência triplicada nas últimas três décadas, atingiu taxas atuais de 0,4/100.000 habitantes.2 Anteriormente respondia por 0,5% a 1,5% de todas as neoplasias do SNC, representando atualmente 4% a 7% destes tumores.3 O aumento da incidência ocorreu em indivíduos imunossuprimidos 4 e em imunocompetentes. 1Os casos de LPSNC não relacionados à SIDA acometem pacientes de 45 a 70 anos, com predomínio acima de 60 anos. Raramente ocorrem em crianças. 4,5,6 Há discreto predo-