The capacity of HIV-1 to establish latent infection of CD4+ T cells may allow viral persistence despite immune responses and antiretroviral therapy. Measurements of infectious virus and viral RNA in plasma and of infectious virus, viral DNA and viral messenger RNA species in infected cells all suggest that HIV-1 replication continues throughout the course of infection. Uncertainty remains over what fraction of CD4+ T cells are infected and whether there are latent reservoirs for the virus. We show here that during the asymptomatic phase of infection there is an extremely low total body load of latently infected resting CD4+ T cells with replication-competent integrated provirus (<10(7) cells). The most prevalent form of HIV-1 DNA in resting and activated CD4+ T cells is a full-length, linear, unintegrated form that is not replication competent. The infection progresses even though at any given time in the lymphoid tissues integrated HIV-1 DNA is present in only a minute fraction of the susceptible populations, including resting and activated CD4+ T cells and macrophages.

In spite of worse physiological and IADL impairments, once the women recovered from hip fracture surgery, they did not necessarily use more health care resources than non-hip fracture patients. To prevent functional deterioration, interventions need to focus on knee strength and mobility training.

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e19522 Background: Panobinostat (pano) is a pan histone de-acetylatase inhibitor (HDAC-i) approved by the FDA for use with bortezomib (btz) and dexamethasone (dex) for patients with multiple myeloma (MM) who have had ≥2 prior lines of therapy including both btz and an immunomodulatory agent (IMiD). The goal of this retrospective study is to evaluate the efficacy and safety of pano in combination with a variety of FDA approved agents as would be utilized in a real world management in relapsed/refractory (RR) MM. Methods: Between February 2015 and July 2016, 37 consecutive patients with RRMM treated with commercial pano were identified and the electronic medical record was reviewed. Results: Median age was 62 (range 27-78), with 57% percent male. Ten (27%) had high-risk FISH as defined by t(14;16), t(4;14), del p53, and gain 1q21. Median number of prior lines was 6 (range 2-9). All patients were RR to their last line of therapy, and 20 (54%) were btz-refractory, 27 (73%) were lenalidomide-refractory, 29 (78%) were pomalidomide-refractory, and 29 (78%) were carfilzomib-refractory. Thirty-three (89%) were penta-refractory; eight (21%) were penta-refractory, and 4 (11%) were refractory to prior HDAC-i therapy. Median number of cycles with pano was 2 (range 0.25 - 10). The overall response rate (≥ partial response) was 29.4% and the clinical benefit rate (≥ minor response) was 71.4%. Median progression-free survival was 2.4 months (95% CI: [1.63 – 4.43]). Median duration of response (≥SD) was 4.1 months. Median overall survival from initiation of pano was 7.5 months (95% CI: [5.17, NA]). One patient discontinued pano due to AEs. Grade 3 and 4 non-hematologic toxicities were diarrhea (N = 1), and respiratory failure (N = 1). Grade 3 and 4 hematologic adverse events (AEs) occurred in 13 (35%) patients, with 7 (19%) anemia, 11 neutropenia (30%), and 10 (37%) thrombocytopenia. Serious AEs included acute kidney injury, GI bleed, and febrile neutropenia each occurring in 1 patient. Conclusions: Use of pano outside of the FDA indication in combination with PI and IMiD-based regimens has activity and is well tolerated in quad and penta-refractory MM patients.