Derek Galligan

Human immunodeficiency virus-1 evolutionary patterns associated with pathogenic processes in the brain

The interplay between pathology and human immunodeficiency virus (HIV) expansion in brain tissues has not been thoroughly assessed in the highly active antiretroviral therapy (HAART) era. HIV-associated dementia (HAD) is marked by progressive brain infection due to recruitment and migration of macrophages in brain tissues; however, the cellular and viral events occurring prior to HAD development and death are under debate. In this study, 66 brain tissues from 11 autopsies were analyzed to assess HIV-1 DNA concentration in brain tissues. In most patients without HAD, it was impossible to amplify HIV-1 from brain tissues. Amplifiable DNA was obtained from three cases of patients on HAART who died due to primary pathology other than HAD: (1) cardiovascular disease, a disease associated with HAART therapy; (2) bacterial infections, including Mycobacterium avium complex, rapid occurrence of extreme dementia; and (3) acquired immunodeficiency syndrome (AIDS)-related lymphoma with meningeal involvement. HIV-1 DNA was also amplified from multiple tissues of two HAD patients. Analysis of HIV-1 nef, gp120, and gp41 sequences showed reduced viral evolution within brain tissues for the non-HAD cases relative to patients with clinical and histological HAD. The present study is the first to show a potential correlation between HIV-1 evolutionary patterns in the brain and different neuropathologies.

Extensive HIV-1 intra-host recombination is common in tissues with abnormal histopathology.

There is evidence that immune-activated macrophages infected with the Human Immunodeficiency Virus (HIV) are associated with tissue damage and serve as a long-lived viral reservoir during therapy. In this study, we analyzed 780 HIV genetic sequences generated from 53 tissues displaying normal and abnormal histopathology. We found up to 50% of the sequences from abnormal lymphoid and macrophage rich non-lymphoid tissues were intra-host viral recombinants. The presence of extensive recombination, especially in non-lymphoid tissues, implies that HIV-1 infected macrophages may significantly contribute to the generation of elusive viral genotypes in vivo. Because recombination has been implicated in immune evasion, the acquisition of drug-resistance mutations, and alterations of viral co-receptor usage, any attempt towards the successful eradication of HIV-1 requires therapeutic approaches targeting tissue macrophages.

Distinct Patterns of HIV-1 Evolution within Metastatic Tissues in Patients with Non-Hodgkins Lymphoma

Despite highly active antiretroviral therapy (HAART), AIDS related lymphoma (ARL) occurs at a significantly higher rate in patients infected with the Human Immunodeficiency Virus (HIV) than in the general population. HIV-infected macrophages are a known viral reservoir and have been shown to have lymphomagenic potential in SCID mice; therefore, there is an interest in determining if a viral component to lymphomagenesis also exists. We sequenced HIV-1 envelope gp120 clones obtained post mortem from several tumor and non-tumor tissues of two patients who died with AIDS-related Non-Hodgkins lymphoma (ARL-NH). Similar results were found in both patients: 1) high-resolution phylogenetic analysis showed a significant degree of compartmentalization between lymphoma and non-lymphoma viral sub-populations while viral sub-populations from lymph nodes appeared to be intermixed within sequences from tumor and non-tumor tissues, 2) a 100-fold increase in the effective HIV population size in tumor versus non-tumor tissues was associated with the emergence of lymphadenopathy and aggressive metastatic ARL, and 3) HIV gene flow among lymph nodes, normal and metastatic tissues was non-random. The different population dynamics between the viruses found in tumors versus the non-tumor associated viruses suggest that there is a significant relationship between HIV evolution and lymphoma pathogenesis. Moreover, the study indicates that HIV could be used as an effective marker to study the origin and dissemination of lymphomas in vivo.

High level HIV-1 DNA concentrations in brain tissues differentiate patients with post-HAART AIDS dementia complex or cardiovascular disease from those with AIDS

Highly active antiretroviral treatment (HAART) has had a significant impact on survival of individuals with acquired immunodeficiency syndrome (AIDS); however, with the longer life-span of patients with AIDS, there is increasing prevalence of AIDS dementia complex (ADC) and other non-AIDS-defining illness, and cardiovascular diseases (CVD) are also common. The influence of these varied disease processes on HIV-1 DNA concentration in brain tissues has not been thoroughly assessed in the post-HAART era. The purpose of the current study is to clarify the impacts of ADC and other complications of HIV disease on the viral load in the brains in AIDS patients with post-HARRT. We examined autopsy specimens from the brains of thirteen patients who died from complications of AIDS with quantitative polymerase chain reaction (QPCR). All but one patient had received HAART prior to death since 1995. Two patients died with severe CVD, multiple cerebrovascular atherosclerosis (CVA) throughout the brain and five patients died with ADC. Six patients had no ADC/CVA. A QPCR was used to measure the presence of HIV-1 DNA in six brain tissues (meninges, frontal grey matter, frontal white matter, temporal subcortex, cerebellum and basal ganglia). In the post-HARRT era, for non-ADC/CVA patients, HIV-1 DNA concentration in brain tissues was statistically higher than that in patients with ADC. In a new finding, two patients who suffered from severe CVD, especially CVA, also had high concentrations of HIV-1 in brain compartments not showing ADC related changes. To our knowledge, this is the first report of a relationship between the CVA and HIV-1 viral burden in brain. The current observations suggest that HAART-resistant HIV reservoirs may survive within ADC lesions of the brain as well as the macrophage rich atherosclerosis, which needs to be confirmed by more AIDS cases with CVA.

Advance care planning and specialty palliative care utilization for patients with hematologic malignancies who undergo allogeneic hematopoietic cell transplant.

18 Background: Unlike most metastatic solid tumors, many advanced hematologic malignancies are treated with curative intent. Accordingly, aggressive interventions often continue until late in the disease course because it can be difficult to discern when cure is no longer possible. This is particularly true for recipients of allogeneic hematopoietic cell transplant (alloHCT). We hypothesized that alloHCT recipients and their providers would be less likely to utilize specialty Palliative Care (PC) services or to engage in early communication regarding advance care planning. METHODS This was a single-center, retrospective chart review of all alloHCT recipients at the University of California, San Francisco who died between 2012-2016. Patients were excluded if there was insufficient data available for analysis. RESULTS Of the 122 alloHCT deaths identified, 75 met inclusion criteria. The median age at alloHCT was 55, and most patients were Caucasian (69%), were transplanted for acute leukemia or MDS (77%), and received a well-matched allograft (81%). 57% died from disease relapse and 20% died from treatment-related causes. 61% of alloHCT recipients died in the hospital, with 37% dying in an ICU. 52% of patients received chemotherapy within 2 months of death, and 17% within 2 weeks. While 79% of patients were DNR/DNI at the time of death, the median time from change of code status to death was 4.5 days. 80% of patients had no prior code status documented in an outpatient note, and a specific goals-of-care conversation was documented in < 25% of outpatient charts. The PC service was consulted for the majority of patients (57%), although the median time from consultation to death was 13 days, with 23% of all consultations occurring within 3 days of death. Only 16% of patients accessed specialty PC services more than 30 days prior to their death. CONCLUSIONS Despite high rates of both disease- and treatment-related mortality, as well as significant morbidity associated with alloHCT, recipients of alloHCT at our institution infrequently engaged in early conversations about end-of-life care and rarely utilized specialty PC services more than 1 month prior to dying.

Building a patient-centered model: Palliative medicine and cancer care.

75 Background: Palliative medicine (PM) improves outcomes for cancer patients. Still, there is limited evidence around components of an efficient, patient-centered model for integrating PM into oncologic care. While PM is committed to aligning with a patients goals of care, very few programs incorporate their input into design or evaluation. The aim of this project is to combine best practice in PM with perspectives of patients, families and providers to develop an empathic PM service. We hypothesize that collaboration with stakeholders and user experience experts will result in a feasible, impactful and translatable model of care that aligns with patient and family goals. METHODS We are conducting semi-structured interviews with 30 patients, family members and 30 oncologists. Patient interviews assess needs and coping mechanisms. Provider interviews assess perceptions and experiences around PM. We will conduct observations to understand how patients and providers interact and how current protocols are operationalized. Data will be coded and analyzed for major themes. An expert panel of patients, family members, health care providers and design experts will assimilate the data and make recommendations for the prototype care model design. The model will be piloted and evaluated in fall 2014. Outcome metrics include patient satisfaction, symptom management, utilization, mortality, and others identified during development. Data from the pilot will inform intervention improvements in preparation for a large-scale, 12- month pilot in an outpatient PM clinic. RESULTS Preliminary work includes the development of a novel patient and family interview protocol that integrates cutting-edge research on PM with best practices for conducting empathic interviews. We will present initial results from these interviews at the symposium, as well as our iterative design process. CONCLUSIONS This project integrates data on patient and family experience with known best practices to develop a patient-centered model for palliative cancer care. The development process and potential outcomes hold significant promise for the design of patient and provider-centered care models, especially those related to chronic and serious illnesses.

Genetically restricted HIV-1 sub populations are associated with and migrate within metastatic sites of AIDS-related lymphoma

Address: 1Department of Pathology, Immunology, and Laboratory Medicine, University of Florida, Gainesville, Florida, USA, 2Department of Medicine, Heme-Onc Division, University of California, San Francisco, San Francisco, California, USA, 3The AIDS and Cancer Specimen Resource, University of California, San Francisco, San Francisco, California, USA and 4BioInfoExperts Inc., Gainesville, Florida, USA * Corresponding author