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1.
Article in English | MEDLINE | ID: mdl-32026760

ABSTRACT

End Stage Renal Disease (ESRD) is a life-limiting condition for which hospice and palliative care are not routinely provided to patients and families. While the ESRD mortality rate is close to 25%, patients on dialysis are half as likely to receive hospice services than patients with other life-limiting diagnoses. Nephrologists and dialysis social workers receive little training to effectively lead patients with ESRD and their families through the stages of dying and the completion of advance care planning. The lack of professional training, a need for greater commitment to advanced care planning from dialysis corporations, and reimbursement problems for hospice care, all contribute to low rates of hospice use within the ESRD population. An ESRD advance care training program for social workers is described that was developed as a part of a larger research project designed to increase advance care planning and referrals for hospice for those with ESRD. The goals were to help social workers become better advocates for patients and families, appreciate cultural, spiritual, racial and ethnic differences, and understand the ethical and legal issues in advance care planning. The challenges that emerged included high staff turnover and a paucity of corporate commitment to training.


Subject(s)
Advance Care Planning/statistics & numerical data , Kidney Failure, Chronic/nursing , Palliative Care/psychology , Social Workers/psychology , Attitude to Death , Humans , Kidney Failure, Chronic/psychology , Patient Participation , Quality of Life/psychology
2.
BMC Palliat Care ; 18(1): 64, 2019 Jul 26.
Article in English | MEDLINE | ID: mdl-31349844

ABSTRACT

BACKGROUND: Patients with end-stage kidney disease (ESKD) on hemodialysis have limited life expectancy, yet their palliative care needs often go unmet. The aim of this study was to identify barriers and facilitators for implementation of "Shared Decision Making and Renal Supportive Care" (SDM-RSC), an intervention to improve advance care planning (ACP) for patients with ESKD on hemodialysis. METHODS: The Consolidated Framework for Implementation Research (CFIR) was the organizing framework for this study. CFIR is a theory-based implementation framework consisting of five domains (Intervention Characteristics, Inner Setting, Outer Setting, Characteristics of Individuals, and Process), each of which has associated constructs. Potential barriers and facilitators to implementation of the SDM-RSC intervention were identified through observation of study procedures, surveys of social workers nephrologists, study participants, and family members, and assessment of intervention fidelity. RESULTS: Twenty-nine nephrologists and 24 social workers, representing 18 outpatient dialysis units in Massachusetts (n = 10) and New Mexico (n = 8), were trained to conduct SDM-RSC intervention sessions. A total of 102 of 125 patient enrolled in the study received the intervention; 40 had family members present. Potential barriers and facilitators to implementation of the SDM-RSC intervention were identified in each of the five CFIR domains. Barriers included complexity of the intervention; challenges to meeting with patients on non-dialysis days; difficulties scheduling intervention sessions due to nephrologists' and social workers' caseloads; perceived need for local policy change regarding ACP; perceived need for additional ACP training for social workers and nephrologists; and lack of endorsement of the intervention by some staff members. Facilitators included: training for social workers, national dialysis chain leadership engagement and the institution of social worker/nephrologist clinic champions. CONCLUSIONS: ACP for patients on hemodialysis can have a positive impact on end-of-life outcomes for patients and their families but does not take place routinely. The barriers to effective implementation of interventions to improve ACP identified in this study might be addressed by: adapting the intervention for local contexts with input from clinicians, dialysis staff, patients and families; providing nephrologists and social workers additional training prior to delivering the intervention; and developing policy that routinizes ACP for hemodialysis patients. TRIAL REGISTRATION: Clinicaltrials.gov NCT02405312. Registered 04/01/2015.


Subject(s)
Advance Care Planning , Kidney Failure, Chronic/psychology , Nephrologists/psychology , Renal Dialysis/methods , Social Workers/psychology , Adult , Aged , Decision Making, Shared , Female , Humans , Kidney Failure, Chronic/therapy , Male , Middle Aged , Nephrologists/statistics & numerical data , Palliative Care/methods , Palliative Care/psychology , Renal Dialysis/psychology , Social Workers/statistics & numerical data , Surveys and Questionnaires
3.
Nephrol Dial Transplant ; 34(9): 1517-1525, 2019 09 01.
Article in English | MEDLINE | ID: mdl-30395311

ABSTRACT

BACKGROUND: Guiding patients with advanced chronic kidney disease (CKD) through advance care planning about future treatment obliges an assessment of prognosis. A patient-specific integrated model to predict mortality could inform shared decision-making for patients with CKD. METHODS: Patients with Stages 4 and 5 CKD from Massachusetts (749) and West Virginia (437) were prospectively evaluated for clinical parameters, functional status [Karnofsky Performance Score (KPS)] and their provider's response to the Surprise Question (SQ). A predictive model for 12-month mortality was derived with the Massachusetts cohort and then validated externally on the West Virginia cohort. Logistic regression was used to create the model, and the c-statistic and Hosmer-Lemeshow statistic were used to assess model discrimination and calibration, respectively. RESULTS: In the derivation cohort, the SQ, KPS and age were most predictive of 12-month mortality with odds ratios (ORs) [95% confidence interval (CI)] of 3.29 (1.87-5.78) for a 'No' response to the SQ, 2.09 (95% CI 1.19-3.66) for fair KPS and 1.41 (95% CI 1.15-1.74) per 10-year increase in age. The c-statistic for the 12-month mortality model for the derivation cohort was 0.80 (95% CI 0.75-0.84) and for the validation cohort was 0.74 (95% CI 0.66-0.83). CONCLUSIONS: Our integrated prognostic model for 12-month mortality in patients with advanced CKD had good discrimination and calibration. This model provides prognostic information to aid nephrologists in identifying and counseling advanced CKD patients with poor prognosis who are facing the decision to initiate dialysis or pursue medical management without dialysis.


Subject(s)
Decision Making , Models, Statistical , Renal Insufficiency, Chronic/mortality , Risk Assessment/methods , Aged , Female , Humans , Male , Prognosis , Prospective Studies , Renal Dialysis , Renal Insufficiency, Chronic/pathology , Survival Rate , United States/epidemiology
4.
Am J Nurs ; 118(5): 50-59, 2018 May.
Article in English | MEDLINE | ID: mdl-29698279

ABSTRACT

: This article presents the discussion that occurred during a policy dialogue on aid in dying (AID) presented at the American Academy of Nursing's annual conference in October 2016. Panelists explored the arguments for and against the growing state expansion of AID legislation, and the role for nurses in assisting patients who request AID. Recommendations are offered and four expert commentaries respond to the points raised.


Subject(s)
Nurse's Role , Patient Advocacy , Suicide, Assisted/legislation & jurisprudence , Terminal Care/standards , American Nurses' Association , Congresses as Topic , Humans , Professional Autonomy , United States
6.
Clin Cancer Res ; 22(22): 5461-5471, 2016 Nov 15.
Article in English | MEDLINE | ID: mdl-27169994

ABSTRACT

PURPOSE: Nivolumab, an anti-PD-1 immune checkpoint inhibitor, improved overall survival versus everolimus in a phase 3 trial of previously treated patients with metastatic renal cell carcinoma (mRCC). We investigated immunomodulatory activity of nivolumab in a hypothesis-generating prospective mRCC trial. EXPERIMENTAL DESIGN: Nivolumab was administered intravenously every 3 weeks at 0.3, 2, or 10 mg/kg to previously treated patients and 10 mg/kg to treatment-naïve patients with mRCC. Baseline and on-treatment biopsies and blood were obtained. Clinical activity, tumor-associated lymphocytes, PD-L1 expression (Dako immunohistochemistry; ≥5% vs. <5% tumor membrane staining), tumor gene expression (Affymetrix U219), serum chemokines, and safety were assessed. RESULTS: In 91 treated patients, median overall survival [95% confidence interval (CI)] was 16.4 months [10.1 to not reached (NR)] for nivolumab 0.3 mg/kg, NR for 2 mg/kg, 25.2 months (12.0 to NR) for 10 mg/kg, and NR for treatment-naïve patients. Median percent change from baseline in tumor-associated lymphocytes was 69% (CD3+), 180% (CD4+), and 117% (CD8+). Of 56 baseline biopsies, 32% had ≥5% PD-L1 expression, and there was no consistent change from baseline to on-treatment biopsies. Transcriptional changes in tumors on treatment included upregulation of IFNγ-stimulated genes (e.g., CXCL9). Median increases in chemokine levels from baseline to C2D8 were 101% (CXCL9) and 37% (CXCL10) in peripheral blood. No new safety signals were identified. CONCLUSIONS: Immunomodulatory effects of PD-1 inhibition were demonstrated through multiple lines of evidence across nivolumab doses. Biomarker changes from baseline reflect nivolumab pharmacodynamics in the tumor microenvironment. These data may inform potential combinations. Clin Cancer Res; 22(22); 5461-71. ©2016 AACR.


Subject(s)
Antibodies, Monoclonal/immunology , Antibodies, Monoclonal/therapeutic use , Carcinoma, Renal Cell/immunology , Carcinoma, Renal Cell/therapy , Immunologic Factors/immunology , Immunologic Factors/therapeutic use , Kidney Neoplasms/immunology , Kidney Neoplasms/therapy , Antineoplastic Agents/immunology , Antineoplastic Agents/therapeutic use , B7-H1 Antigen/immunology , Chemokine CXCL10/immunology , Chemokine CXCL9/immunology , Everolimus/immunology , Everolimus/therapeutic use , Female , Humans , Interferon-gamma/immunology , Lymphocytes/drug effects , Lymphocytes/immunology , Male , Middle Aged , Nivolumab , Prospective Studies , Tumor Microenvironment/drug effects , Tumor Microenvironment/immunology , Up-Regulation/drug effects , Up-Regulation/immunology
7.
Clin J Am Soc Nephrol ; 11(9): 1703-1712, 2016 09 07.
Article in English | MEDLINE | ID: mdl-27197911

ABSTRACT

Including target populations in the design and implementation of research trials has been one response to the growing health disparities endemic to our health care system, as well as an aid to study generalizability. One type of community-based participatory research is "Patient Centered-Research", in which patient perspectives on the germane research questions and methodologies are incorporated into the study. The Patient-Centered Outcomes Research Institute (PCORI) has mandated that meaningful patient and stakeholder engagement be incorporated into all applications. As of March 2015, PCORI funded seven clinically-focused studies of patients with kidney disease. The goal of this paper is to synthesize the experiences of these studies to gain an understanding of how meaningful patient and stakeholder engagement can occur in clinical research of kidney diseases, and what the key barriers are to its implementation. Our collective experience suggests that successful implementation of a patient- and stakeholder-engaged research paradigm involves: (1) defining the roles and process for the incorporation of input; (2) identifying the particular patients and other stakeholders; (3) engaging patients and other stakeholders so they appreciate the value of their own participation and have personal investment in the research process; and (4) overcoming barriers and challenges that arise and threaten the productivity of the collaboration. It is our hope that the experiences of these studies will further interest and capacity for incorporating patient and stakeholder perspectives in research of kidney diseases.


Subject(s)
Community-Based Participatory Research , Kidney Diseases , Patient Outcome Assessment , Patient Participation , Stakeholder Participation , Humans , Patient Selection
8.
Cancer Chemother Pharmacol ; 77(1): 155-62, 2016 Jan.
Article in English | MEDLINE | ID: mdl-26576779

ABSTRACT

PURPOSE: The study evaluated the safety, tolerability, and pharmacokinetics of BMS-936561, a fully human monoclonal antibody-drug conjugate targeting CD70 cell-surface protein. METHODS: Eligible patients had ECOG performance status 0-2 and received ≤3 prior chemotherapy regimens. An initial accelerated titration design enrolling one patient per dose level was followed by 3 + 3 dose escalation with the first observation of a grade ≥2 adverse event (AE). We tested escalating doses of BMS-936561 (0.5, 1, 2, 4, 8, 15 mg/kg) administered every 21 days in a 42 day cycle for a maximum of 17 cycles. Pharmacokinetic samples were collected in cycle 1. RESULTS: A total of 26 patients enrolled; 16 and 10 for the escalation and expansion cohorts, respectively. Median age was 63 years (48-74); 18 males and 25 Caucasians. There was no defined MTD per protocol, but a DLT of grade 3 hypersensitivity was recorded in 2 of 16 (13%) subjects at the highest dose of 15 mg/kg. The most frequent AEs were: fatigue (85%), nausea (54%), and decreased appetite (39%). Delayed toxicities (facial edema and pleural/pericardial effusions) occurred in 6 of 16 (38%) subjects at the 15 mg/kg dose. PK analysis showed a dose-proportional increase in active drug levels with increasing doses. There was disease stabilization in 18 of 26 patients (69%) without correlation with received dose. CONCLUSIONS: BMS-936561 is well tolerated over a wide range of doses in patients with advanced ccRCC and B-NHL. The 8 mg/kg dose was the highest best tolerated dose and the recommended dose for future studies.


Subject(s)
Antineoplastic Agents, Alkylating/administration & dosage , Carcinoma, Renal Cell/drug therapy , Immunoconjugates/administration & dosage , Indoles/administration & dosage , Kidney Neoplasms/drug therapy , Lymphoma, B-Cell/drug therapy , Aged , Antineoplastic Agents, Alkylating/adverse effects , Antineoplastic Agents, Alkylating/pharmacokinetics , CD27 Ligand/immunology , Carcinoma, Renal Cell/pathology , Dose-Response Relationship, Drug , Female , Humans , Immunoconjugates/adverse effects , Immunoconjugates/pharmacokinetics , Indoles/adverse effects , Indoles/pharmacokinetics , Kidney Neoplasms/pathology , Lymphoma, B-Cell/pathology , Male , Maximum Tolerated Dose , Middle Aged
9.
Oncotarget ; 7(3): 2809-22, 2016 Jan 19.
Article in English | MEDLINE | ID: mdl-26646452

ABSTRACT

The CXCR4 receptor (Chemokine C-X-C motif receptor 4) is highly expressed in different hematological malignancies including chronic lymphocytic leukemia (CLL). The CXCR4 ligand (CXCL12) stimulates CXCR4 promoting cell survival and proliferation, and may contribute to the tropism of leukemia cells towards lymphoid tissues. Therefore, strategies targeting CXCR4 may constitute an effective therapeutic approach for CLL. To address that question, we studied the effect of Ulocuplumab (BMS-936564), a fully human IgG4 anti-CXCR4 antibody, using a stroma--CLL cells co-culture model. We found that Ulocuplumab (BMS-936564) inhibited CXCL12 mediated CXCR4 activation-migration of CLL cells at nanomolar concentrations. This effect was comparable to AMD3100 (Plerixafor--Mozobil), a small molecule CXCR4 inhibitor. However, Ulocuplumab (BMS-936564) but not AMD3100 induced apoptosis in CLL at nanomolar concentrations in the presence or absence of stromal cell support. This pro-apoptotic effect was independent of CLL high-risk prognostic markers, was associated with production of reactive oxygen species and did not require caspase activation. Overall, these findings are evidence that Ulocuplumab (BMS-936564) has biological activity in CLL, highlight the relevance of the CXCR4-CXCL12 pathway as a therapeutic target in CLL, and provide biological rationale for ongoing clinical trials in CLL and other hematological malignancies.


Subject(s)
Antineoplastic Agents/pharmacology , Apoptosis/drug effects , Chemokine CXCL12/biosynthesis , Imino Furanoses/pharmacology , Leukemia, Lymphocytic, Chronic, B-Cell/drug therapy , Pyrimidinones/pharmacology , Reactive Oxygen Species/metabolism , Receptors, CXCR4/antagonists & inhibitors , Actins/metabolism , Benzylamines , Cell Movement/drug effects , Cell Proliferation , Cell Survival , Chemokine CXCL12/metabolism , Cyclams , Enzyme Activation/drug effects , Heterocyclic Compounds/pharmacology , Humans , Jurkat Cells , Leukocytes, Mononuclear , Receptors, CXCR4/biosynthesis , Tumor Cells, Cultured , Tumor Suppressor Protein p53/metabolism
10.
BMC Palliat Care ; 14: 30, 2015 Jun 12.
Article in English | MEDLINE | ID: mdl-26066323

ABSTRACT

BACKGROUND: End-stage renal disease carries a prognosis similar to cancer yet only 20 % of end-stage renal disease patients are referred to hospice. Furthermore, conversations between dialysis team members and patients about end-of-life planning are uncommon. Lack of provider training about how to communicate prognostic data may contribute to the limited number of end-of-life care discussions that take place with this chronically ill population. In this study, we will test the Shared Decision-Making Renal Supportive Care communication intervention to systematically elicit patient and caretaker preferences for end-of-life care so that care concordant with patients' goals can be provided. METHODS/DESIGN: This multi-center study will deploy an intervention to improve end-of-life communication for hemodialysis patients who are at high risk of death in the ensuing six months. The intervention will be carried out as a prospective cohort with a retrospective cohort serving as the comparison group. Patients will be recruited from 16 dialysis units associated with two large academic centers in Springfield, Massachusetts and Albuquerque, New Mexico. Critical input from patient advisory boards, a stakeholder panel, and initial qualitative analysis of patient and caretaker experiences with advance care planning have informed the communication intervention. Rigorous communication training for hemodialysis social workers and providers will ensure that standardized study procedures are performed at each dialysis unit. Nephrologists and social workers will communicate prognosis and provide advance care planning in face-to-face encounters with patients and families using a social work-centered algorithm. Study outcomes including frequency and timing of hospice referrals, patient and caretaker satisfaction, quality of end-of-life discussions, and quality of death will be assessed over an 18 month period. DISCUSSION: The Shared Decision-Making Renal Supportive Care Communication intervention intends to improve discussions about prognosis and end-of-life care with end-stage renal disease patients. We anticipate that the intervention will help guide hemodialysis staff and providers to effectively participate in advance care planning for patients and caretakers to establish preferences and goals at the end of life. TRIAL REGISTRATION: NCT02405312.


Subject(s)
Advance Care Planning/organization & administration , Kidney Failure, Chronic/psychology , Renal Dialysis/psychology , Research Design , Terminal Care/organization & administration , Aged , Communication , Decision Making , Female , Humans , Kidney Failure, Chronic/therapy , Male , Middle Aged , Patient Participation , Physician-Patient Relations , Prognosis , Terminal Care/psychology
11.
Clin J Am Soc Nephrol ; 10(3): 390-400, 2015 Mar 06.
Article in English | MEDLINE | ID: mdl-25680737

ABSTRACT

BACKGROUND AND OBJECTIVES: More than 90,000 patients with ESRD die annually in the United States, yet advance care planning (ACP) is underutilized. Understanding patients' and families' diverse needs can strengthen systematic efforts to improve ACP. DESIGN, SETTING, PARTICIPANTS, & MEASUREMENTS: In-depth interviews were conducted with a purposive sample of patients and family/friends from dialysis units at two study sites. Applying grounded theory, interviews were audiotaped, professionally transcribed, and analyzed in an iterative process. Emergent themes were identified, discussed, and organized into major themes and subthemes. RESULTS: Thirteen patients and nine family/friends participated in interviews. The mean patient age was 63 years (SD 14) and five patients were women. Participants identified as black (n=1), Hispanic (n=4), Native American (n=4), Pacific Islander (n=1), white (n=11), and mixed (n=1). Three major themes with associated subthemes were identified. The first theme, "Prior experiences with ACP," revealed that these discussions rarely occur, yet most patients desire them. A potential role for the primary care physician was broached. The second theme, "Factors that may affect perspectives on ACP," included a desire for more of a connection with the nephrologist, positive and negative experiences with the dialysis team, disenfranchisement, life experiences, personality traits, patient-family/friend relationships, and power differentials. The third theme, "Recommendations for discussing ACP," included thoughts on who should lead discussions, where and when discussions should take place, what should be discussed and how. CONCLUSIONS: Many participants desired better communication with their nephrologist and/or their dialysis team. A number expressed feelings of disenfranchisement that could negatively impact ACP discussions through diminished trust. Life experiences, personality traits, and relationships with family and friends may affect patient perspectives regarding ACP. This study's findings may inform clinical practice and will be useful in designing prospective intervention studies to improve patient and family experiences at the end of life.


Subject(s)
Advance Care Planning , Kidney Failure, Chronic/therapy , Physician's Role , Primary Health Care , Adult , Aged , Aged, 80 and over , Communication , Family , Female , Friends , Humans , Interviews as Topic , Male , Middle Aged , Patient Participation , Patient Satisfaction , Personality , Physician-Patient Relations , Qualitative Research , Renal Dialysis
12.
Clin J Am Soc Nephrol ; 9(12): 2203-9, 2014 Dec 05.
Article in English | MEDLINE | ID: mdl-25104274

ABSTRACT

As the importance of providing patient-centered palliative care for patients with advanced illnesses gains attention, standard dialysis delivery may be inconsistent with the goals of care for many patients with ESRD. Many dialysis patients with life expectancy of <1 year may desire a palliative approach to dialysis care, which focuses on aligning patient treatment with patients' informed preferences. This commentary elucidates what comprises a palliative approach to dialysis care and describes its potential and appropriate use. It also reviews the barriers to integrating such an approach into the current clinical paradigm of care and existing infrastructure and outlines system-level changes needed to accommodate such an approach.


Subject(s)
Home Care Services , Kidney Failure, Chronic/therapy , Palliative Care , Patient Preference , Renal Dialysis , Terminal Care , Communication , Humans , Palliative Care/economics , Patient Care Planning , Patient Education as Topic , Patient-Centered Care , Prognosis , Quality of Life , Renal Dialysis/economics , Terminal Care/economics
13.
Blood ; 123(26): 4120-31, 2014 Jun 26.
Article in English | MEDLINE | ID: mdl-24711662

ABSTRACT

The C-X-C chemokine receptor type 4 (CXCR4) plays a crucial role in modulating cell trafficking in hematopoietic stem cells and clonal B cells. We screened 418 patients with B-cell lymphoproliferative disorders and described the presence of the C1013G/CXCR4 warts, hypogammaglobulinemia, infections, and myelokathexis-associated mutation in 28.2% (37/131) of patients with lymphoplasmacytic lymphoma (Waldenström macroglobulinemia [WM]), being either absent or present in only 7% of other B-cell lymphomas. In vivo functional characterization demonstrates its activating role in WM cells, as demonstrated by significant tumor proliferation and dissemination to extramedullary organs, leading to disease progression and decreased survival. The use of a monoclonal antibody anti-CXCR4 led to significant tumor reduction in a C1013G/CXCR4 WM model, whereas drug resistance was observed in mutated WM cells exposed to Bruton's tyrosine kinase, mammalian target of rapamycin, and phosphatidylinositol 3-kinase inhibitors, but not proteasome inhibitors. These findings demonstrate that C1013G/CXCR4 is an activating mutation in WM and support its role as a critical regulator of WM molecular pathogenesis and as an important therapeutic target.


Subject(s)
Drug Resistance, Neoplasm , Enzyme Inhibitors/pharmacology , Mutation, Missense , Receptors, CXCR4/metabolism , Waldenstrom Macroglobulinemia/metabolism , Animals , Cell Proliferation/drug effects , Disease-Free Survival , Female , Heterografts , Humans , Male , Mice , Mice, SCID , Neoplasm Metastasis , Neoplasm Transplantation , Receptors, CXCR4/genetics , Survival Rate , Waldenstrom Macroglobulinemia/drug therapy , Waldenstrom Macroglobulinemia/genetics , Waldenstrom Macroglobulinemia/mortality , Waldenstrom Macroglobulinemia/pathology
15.
Nephrol Dial Transplant ; 29(5): 990-6, 2014 May.
Article in English | MEDLINE | ID: mdl-23787545

ABSTRACT

The burgeoning population of older dialysis patients presents opportunities to provide personalized care. The older dialysis population has a high burden of chronic health conditions, decrements in quality of life and a high risk of death. In order to address these challenges, this review will recommend routinely establishing prognosis through the use of prediction instruments and communicating these findings to older patients. The challenges to prognosis in adults with end-stage renal disease (ESRD) include the subjective nature of clinical judgment, application of appropriate prognostic tools and communication of findings to patients and caregivers. There are three reasons why we believe these conversations occur infrequently with the dialysis population. First, there have previously been no clinically practical instruments to identify individuals undergoing maintenance hemodialysis (HD) who are at highest risk for death. Second, nephrologists have not been trained to have conversations about prognosis and end-of-life care. Third, other than hospitalizations and accrual of new diagnoses, there are no natural milestone guidelines in place for patients supported by dialysis. The prognosis can be used in shared decision-making to establish goals of care, limits on dialysis support or parameters for withdrawal from dialysis. As older adults with ESRD benefit from kidney transplantation, prognosis can also be used to determine who should be referred for evaluation by a kidney transplant team. The use of prognosis in older adults may determine approaches to optimize well-being and personalize care among older adults ranging from hospice to kidney transplantation.


Subject(s)
Geriatric Assessment , Kidney Failure, Chronic/therapy , Aged , Communication , Humans , Kidney Transplantation , Physician-Patient Relations , Prognosis , Renal Dialysis
17.
Clin Cancer Res ; 19(2): 357-66, 2013 Jan 15.
Article in English | MEDLINE | ID: mdl-23213054

ABSTRACT

PURPOSE: CXCR4 has been identified as a prognostic marker for acute myeloid leukemia (AML) and other malignancies. We describe the development and characterization of a fully human antibody to CXCR4 and its application for therapy of AML, non-Hodgkin lymphoma (NHL), chronic lymphoid leukemia (CLL), and multiple myeloma. EXPERIMENTAL DESIGN: Human transgenic mice were immunized with CXCR4-expressing cells, and antibodies reactive with CXCR4 were analyzed for apoptosis induction and ability to interfere with CXCL12-induced migration and calcium flux. In vivo efficacy was determined in multiple AML, NHL, and multiple myeloma xenograft tumors in severe combined immunodeficient mice. RESULTS: BMS-936564/MDX-1338 is a fully human IgG(4) monoclonal antibody that specifically recognizes human CXCR4. In vitro studies show that MDX-1338 binds to CXCR4-expressing cells with low nanomolar affinity, blocks CXCL12 binding to CXCR4-expressing cells, and inhibits CXCL12-induced migration and calcium flux with low nanomolar EC(50) values. When given as monotherapy, MDX-1338 exhibits antitumor activity in established tumors including AML, NHL, and multiple myeloma xenograft models. In addition, we show that MDX-1338 induced apoptosis on a panel of cell lines and propose that antibody-induced apoptosis is one of the mechanisms of tumor growth inhibition. CONCLUSIONS: BMS-936564/MDX-1338 is a potent CXCR4 antagonist which is efficacious as monotherapy in tumor-bearing mice and is currently in phase I for the treatment of relapsed/refractory AML, NHL, CLL, and multiple myeloma.


Subject(s)
Antibodies, Monoclonal, Humanized/pharmacology , Antibodies, Monoclonal/pharmacology , Antineoplastic Agents/pharmacology , Apoptosis/drug effects , Hematologic Neoplasms/immunology , Receptors, CXCR4/immunology , Animals , Antibodies, Monoclonal, Humanized/administration & dosage , Antineoplastic Agents/administration & dosage , Calcium/metabolism , Cell Line, Tumor , Chemokine CXCL12/immunology , Chemokine CXCL12/metabolism , Disease Models, Animal , Hematologic Neoplasms/drug therapy , Hematologic Neoplasms/pathology , Humans , Ligands , Mice , Receptors, CXCR4/antagonists & inhibitors , Receptors, CXCR4/metabolism , Tumor Burden/drug effects , Xenograft Model Antitumor Assays
20.
J Palliat Med ; 15(3): 334-9, 2012 Mar.
Article in English | MEDLINE | ID: mdl-22401355

ABSTRACT

BACKGROUND: Little is known about how often physicians are formally accused of hastening patient deaths while practicing palliative care. METHODS: We conducted an Internet-based survey on a random 50% sample of physician-members of a national hospice and palliative medicine society. RESULTS: The final sample consisted of 663 physicians (response rate 53%). Over half of the respondents had had at least one experience in the last 5 years in which a patient's family, another physician, or another health care professional had characterized palliative treatments as being euthanasia, murder, or killing. One in four stated that at least one friend or family member, or a patient had similarly characterized their treatments. Respondents rated palliative sedation and stopping artificial hydration/nutrition as treatments most likely to be misconstrued as euthanasia. Overall, 25 physicians (4%) had been formally investigated for hastening a patient's death when that had not been their intention-13 while using opiates for symptom relief and six for using medications while discontinuing mechanical ventilation. In eight (32%) cases, another member of the health care team had initiated the charges. At the time of the survey, none had been found guilty, but they reported experiencing substantial anger and worry. CONCLUSIONS: Commonly used palliative care practices continue to be misconstrued as euthanasia or murder, despite this not being the intention of the treating physician. Further efforts are needed to explain to the health care community and the public that treatments often used to relieve patient suffering at the end of life are ethical and legal.


Subject(s)
Homicide , Suicide, Assisted/legislation & jurisprudence , Adult , Data Collection , Female , Humans , Male , Middle Aged , Palliative Care/ethics , Palliative Care/legislation & jurisprudence , Palliative Care/methods , Prevalence , United States
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