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Hematopoietic cell transplant (HCT) is an increasingly common and curative treatment strategy to improve survival among individuals with malignant and nonmalignant diseases, with over one million HCTs having been performed worldwide. Neurocognitive dysfunction is a common and untoward consequence of HCT for many recipients, although few studies have examined the profile of neurocognitive impairments in HCT or their association with clinical features, such as frailty, or the incidence of pre-HCT neurocognitive impairments across all ages, which may influence post-HCT neurocognitive impairments. We examined the pattern and correlates of pre-transplant neurocognitive dysfunction in a prospective sample of adults undergoing HCT. Neurocognition was assessed using the Montreal Cognitive Assessment Battery. Frailty was assessed using the Short Physical Performance Battery. Linear regression analysis was used to examine the associations between neurocognitive performance and frailty. Neurocognitive screening profiles were also examined by partitioning MoCA into domain scores, including Executive Function and Memory. We also examined the associations between neurocognition, frailty, and clinical outcomes, including length of transplant hospitalization and survival. One hundred and ten adults were evaluated across a wide age range (range: 19-75; mean age = 54.7 [SD = 14.1]). Neurocognitive performance tended to fall below published normative levels (mean MoCA = 25.5 [SD = 4.1]), with 17% of participants demonstrating impaired performance compared with medical normative data (MoCA ≤ 22) and 34% exhibiting impaired performance relative to healthy samples (MoCA ≤ 25). Mild impairments (MoCA ≤ 25) were common across age ranges, including middle-aged patients (23% for age < 50; 35% for age 50-60, 41% for age ≥ 60), particularly for items assessing Executive Function. Greater levels of frailty associated with lower neurocognitive screening scores (r = -0.29, P < 0.01) and Executive Functioning (r = -0.24, P < 0.01), whereas greater age was associated with poorer Memory performance only (r = -0.33, P < 0.01). Greater levels of frailty prior to transplant associated with longer length of stay (β = 0.10, P = 0.046), but were not associated with survival. Neurocognitive impairments are common among adults undergoing HCT and the pattern of performance varies by age. Pre-transplant frailty is associated with neurocognitive functioning and may portend worse post-transplant early clinical outcomes.

Introduction In order to study the role of the microbiome in hematopoietic stem cell transplantation (HCT), researchers collect stool samples from patients at various time points throughout HCT. However, stool collection requires active subject participation and may be limited by patient reluctance to handling stool. Methods We performed a prospective study on the impact of financial incentives on stool collection rates. The intervention group consisted of allogeneic HCT patients from 05/2017-05/2018 who were compensated with a $10 gas gift card for each stool sample. The intervention group was compared to a historical control group of allogeneic HCT patients from 11/2016-05/2017 who provided stool samples before the incentive was implemented. To control for possible changes in collections over time, we also compared a contemporaneous control group of autologous HCT patients from 05/2017-05/2018 with a historical control group of autologous HCT patients from 11/2016-05/2017; neither autologous HCT group was compensated. The collection rate was defined as the number of samples provided divided by the number of time points we attempted to obtain stool. Results There were 35 allogeneic HCT patients in the intervention group, 19 allogeneic HCT patients in the historical control group, 142 autologous HCT patients in the contemporaneous control group (that did not receive a financial incentive), and 75 autologous HCT patients in the historical control group. Allogeneic HCT patients in the intervention group had significantly higher average overall collection rates when compared to the historical control group allogeneic HCT patients (80% vs 37%, p Conclusion Our results demonstrate that a modest incentive can significantly increase collection rates. These results may help to inform the design of future studies involving stool collection.

Lactose can fuel GVHD Allogeneic hematopoietic cell transplantation (allo-HCT) is used to treat certain hematopoietic malignancies, but patients have a risk of developing graft-versus-host disease (GVHD). Stein-Thoeringer et al. performed a large-scale analysis of more than 1300 patients treated with allo-HCT across four clinical centers (see the Perspective by Zitvogel and Kroemer). High levels of bacteria from the Enterococcus genus were associated with greater incidence of GVHD and mortality. Lactose appears to provide a substrate for Enterococcus growth, and patients with a lactose-malabsorption genotype had a greater abundance of Enterococcus. A lactose-free diet limited Enterococcus growth, reduced the severity of GVHD, and improved survival in gnotobiotic mouse models. Science , this issue p. 1143 ; see also p. 1077

Hematopoietic cell transplant (HCT) is an increasingly common and curative treatment strategy to improve survival among individuals with malignant and nonmalignant diseases, with over one million HCTs having been performed worldwide. Neurocognitive dysfunction is a common and untoward consequence of HCT for many recipients, although few studies have examined the profile of neurocognitive impairments in HCT or their association with clinical features, such as frailty, or the incidence of pre-HCT neurocognitive impairments across all ages, which may influence post-HCT neurocognitive impairments. We examined the pattern and correlates of pre-transplant neurocognitive dysfunction in a prospective sample of adults undergoing HCT. Neurocognition was assessed using the Montreal Cognitive Assessment Battery. Frailty was assessed using the Short Physical Performance Battery. Linear regression analysis was used to examine the associations between neurocognitive performance and frailty. Neurocognitive screening profiles were also examined by partitioning MoCA into domain scores, including Executive Function and Memory. We also examined the associations between neurocognition, frailty, and clinical outcomes, including length of transplant hospitalization and survival. One hundred and ten adults were evaluated across a wide age range (range: 19-75; mean age = 54.7 [SD = 14.1]). Neurocognitive performance tended to fall below published normative levels (mean MoCA = 25.5 [SD = 4.1]), with 17% of participants demonstrating impaired performance compared with medical normative data (MoCA ≤ 22) and 34% exhibiting impaired performance relative to healthy samples (MoCA ≤ 25). Mild impairments (MoCA ≤ 25) were common across age ranges, including middle-aged patients (23% for age50; 35% for age 50-60, 41% for age ≥ 60), particularly for items assessing Executive Function. Greater levels of frailty associated with lower neurocognitive screening scores (r = -0.29, P 0.01) and Executive Functioning (r = -0.24, P 0.01), whereas greater age was associated with poorer Memory performance only (r = -0.33, P 0.01). Greater levels of frailty prior to transplant associated with longer length of stay (β = 0.10, P = 0.046), but were not associated with survival. Neurocognitive impairments are common among adults undergoing HCT and the pattern of performance varies by age. Pre-transplant frailty is associated with neurocognitive functioning and may portend worse post-transplant early clinical outcomes.

Hematopoietic stem cell transplantation (HCT) is a curative treatment option for patients with hematologic conditions but presents many complications that must be managed as a complex, chronic condition. Mobile health applications (mHealth apps) may permit tracking of symptoms in HCT. In seeking strategies to manage the complexities of HCT, our team collaborated with Sicklesoft, Inc., to develop an mHealth app specifically for HCT patients to allow for daily evaluation of patient health, Technology Recordings to better Understand Bone Marrow Transplantation (TRU-BMT). The primary value of this application is that of potentially enhancing the monitoring of symptoms and general health of patients undergoing HCT, with the ultimate goal of allowing earlier detection of adverse events, earlier intervention, and improving outcomes. To first evaluate patient interest in mHealth apps, we designed and administered an interest survey to patients at the 2017 BMT-InfoNet reunion. As a follow-up to the positive feedback received, we began testing the TRU-BMT app in a Phase 1 pilot study. Thirty patients were enrolled in this single-arm study and were given the TRU-BMT mHealth app on a smartphone device in addition to a wearable activity tracker. Patients were followed for up to 180 days, all the while receiving daily app monitoring. Adherence to TRU-BMT was approximately 30% daily and 44% weekly, and greater adherence was associated with increased meal completion, decreased heart rate, and shorter hospital stay. TRU-BMT assessments of symptom severity were significantly associated with duration of hospital stay and development of chronic graft-versus-host disease. Our findings suggest that using TRU-BMT throughout HCT is feasible for patients and established a proof-of-concept for a future randomized control trial of the TRU-BMT application in HCT. © 2021 American Society for Blood and Marrow Transplantation. Published by Elsevier Inc. All rights reserved.

Allogeneic-HCT (allo-HCT), while potentially curative, can result in significant complications including graft versus host disease (GVHD). Prior studies suggest that metabolic syndrome may be one risk factor for GVHD. We hypothesized that hepatic steatosis on pre-HCT computed tomography (CT) scans may be a marker for development of GVHD and poor outcomes in allo-HCT. In this retrospective study, we reviewed the pre-HCT CT scans and transplant outcome data of patients who underwent allo-HCT at Duke University Medical Center from 2009 to 2017. The presence of steatosis was confirmed using CT attenuation measurements. We then assessed the association between pre-HCT hepatic steatosis and HCT-related outcomes including GVHD. 80 patients who had pre-HCT CT scans were included in the study. Pre-transplant hepatic steatosis was associated with the development of chronic GVHD (OR 4.2, p = 0.02), but was not associated with acute GVHD (OR 1.3, p = 0.7), non-relapse mortality (p = 0.81) or overall survival (p = 0.74). Based on this single center retrospective study, pre-transplant hepatic steatosis is associated with development of chronic GVHD. Further, prospective study with other imaging modalities including non-contrasted CT scans is needed to determine if this association is reproducible.

BACKGROUND: Relationships between microbiota composition and clinical outcomes after allogeneic hematopoietic-cell transplantation have been described in single-center studies. Geographic variations in the composition of human microbial communities and differences in clinical practices across institutions raise the question of whether these associations are generalizable. METHODS: The microbiota composition of fecal samples obtained from patients who were undergoing allogeneic hematopoietic-cell transplantation at four centers was profiled by means of 16S ribosomal RNA gene sequencing. In an observational study, we examined associations between microbiota diversity and mortality using Cox proportional-hazards analysis. For stratification of the cohorts into higher- and lower-diversity groups, the median diversity value that was observed at the study center in New York was used. In the analysis of independent cohorts, the New York center was cohort 1, and three centers in Germany, Japan, and North Carolina composed cohort 2. Cohort 1 and subgroups within it were analyzed for additional outcomes, including transplantation-related death. RESULTS: We profiled 8767 fecal samples obtained from 1362 patients undergoing allogeneic hematopoietic-cell transplantation at the four centers. We observed patterns of microbiota disruption characterized by loss of diversity and domination by single taxa. Higher diversity of intestinal microbiota was associated with a lower risk of death in independent cohorts (cohort 1: 104 deaths among 354 patients in the higher-diversity group vs. 136 deaths among 350 patients in the lower-diversity group; adjusted hazard ratio, 0.71; 95% confidence interval [CI], 0.55 to 0.92; cohort 2: 18 deaths among 87 patients in the higher-diversity group vs. 35 deaths among 92 patients in the lower-diversity group; adjusted hazard ratio, 0.49; 95% CI, 0.27 to 0.90). Subgroup analyses identified an association between lower intestinal diversity and higher risks of transplantation-related death and death attributable to graft-versus-host disease. Baseline samples obtained before transplantation already showed evidence of microbiome disruption, and lower diversity before transplantation was associated with poor survival. CONCLUSIONS: Patterns of microbiota disruption during allogeneic hematopoietic-cell transplantation were similar across transplantation centers and geographic locations; patterns were characterized by loss of diversity and domination by single taxa. Higher diversity of intestinal microbiota at the time of neutrophil engraftment was associated with lower mortality. (Funded by the National Cancer Institute and others.)

PURPOSEMeasurable residual disease (MRD) testing after initial chemotherapy treatment can predict relapse and survival in AML. However, it has not been established if repeat molecular or genetic testing during chemotherapy can offer information regarding the chemotherapy sensitivity of the leukemic clone.PATIENTS AND METHODSBlood from 45 adult AML patients at day 1 and 4 of induction (n = 35) or salvage (n = 10) cytotoxic chemotherapy was collected for both quantitative real-time PCR (qPCR) assessment (WT1) and next generation sequencing (NGS, >500x depth) of 49 gene regions recurrently mutated in MDS/AML.RESULTSThe median age was 62 (23-78); 42% achieved a complete response.WT1was overexpressed in most patients tested but was uninformative for very early MRD assessment. A median of 4 non-synonymous variants (range 0-7) were detected by DNA sequencing of blood on day 1 of therapy (median VAF: 29%). Only two patients had no variants detectable. All mutations remained detectable in blood on day 4 of intensive chemotherapy and remarkably the ratio of mutated to wild-type sequence was often maintained. This phenomenon was not limited to variants inDNMT3A, TET2andASXL1. The kinetics ofNPM1andTP53variant burden early during chemotherapy appeared to be exceptions and exhibited consistent trends in this cohort.CONCLUSIONSMolecular testing of blood on day 4 of chemotherapy is not predictive of clinical response in AML. The observed stability in variant allele frequency suggests that cytotoxic therapy may have a limited therapeutic index for clones circulating in blood containing these mutations. Further validation is required to confirm the utility of monitoringNPM1andTP53kinetics in blood during cytotoxic therapy.

Background Hematopoietic cell transplant (HCT) is an increasingly common and curative treatment strategy to improve survival among individuals malignant and nonmalignant diseases, with over one million HCTs having been performed worldwide. Neurocognitive dysfunction is a common and untoward consequence of HCT for many recipients, although few studies have examined the profile of neurocognitive impairments in HCT or their association with clinical features, such as frailty. Methods We examined the pattern and correlates of pre-transplant neurocognitive dysfunction in a prospective sample of adults undergoing HCT. Neurocognition was assessed using the Montreal Cognitive Assessment Battery. Frailty was assessed using the Short Physical Performance Battery. Linear regression analysis was used to examine the associations between neurocognitive performance and frailty. Profiles of neurocognitive performance were also examined by partitioning MoCA scores into relevant domains of interest, including Executive Function and Memory. Regression analyses controlled for age, gender, education, and disease type. Results One hundred and ten adults were evaluated across a wide age range (range: 19-75; mean age = 54.7 [SD = 14.1]). Neurocognitive performance tended to fall below published normative levels (mean MoCA = 25.5 [SD = 4.1]), with 20% of participants demonstrating impaired performance compared with medical patients (score Conclusions Neurocognitive impairments are common among adults undergoing HCT and the pattern of performance varies by age. Frailty is a strong correlate of neurocognitive function and particularly Executive Function components.

Introduction: Dysbiosis of the gut microbiome during hematopoietic stem cell transplantation (HCT) is associated with adverse post-transplant outcomes such as graft-versus-host disease, bloodstream infections, and mortality. In order to learn more about the role of the microbiome in HCT in adverse clinical outcomes, researchers collect stool samples from patients at various time points throughout HCT. However, unlike blood samples or skin swabs, stool collection requires active subject participation, particularly in the outpatient setting, and may be limited by patient aversion to handling stool. By providing study participants with compensation for their stool samples, we hypothesize that we can significantly increase stool collection rates. Methods: We performed a prospective cohort study on the impact of financial incentives on stool collection rates for microbiome studies. The intervention group consisted of allogeneic (allo)-HCT patients from 05/2017-05/2018 who were compensated with a $10 gas gift card for each stool sample. The intervention group was compared to a historical control group consisting of allo-HCT patients from 11/2016-05/2017 who provided stool samples before the incentive was implemented. To control for potential changes in collections over time, we also compared a contemporaneous control group of autologous (auto)-HCT patients from 05/2017-05/2018 with a historical control group of auto-HCT patients from 11/2016-05/2017; neither auto-HCT groups were compensated. Allo-HCT patients were required to give samples at pre-HCT, day 0 (the day of HCT), and days 7, 14, 21, 30, 60, and 90 post-HCT. Auto-HCT patients were required to give samples at pre-HCT and days 7, 14, and 90 post-HCT. Collection rates were defined as the number of samples provided divided by the number of time points for which we attempted to obtain samples. Patient characteristics were summarized by proportions for categorical variables and median with interquartile ranges for continuous variables. Chi-square tests or Fisher's exact tests were used to compare categorical variables, as appropriate, and Wilcoxon Rank Sum tests or t-tests were used to compare continuous variables, as appropriate. This study was approved by the Duke Institutional Review Board, and informed consent was obtained from all patients. Results: There were 35 allo-HCT patients in the intervention group, 19 allo-HCT patients in the historical control group, 142 auto-HCT patients in the contemporaneous control group, and 75 auto-HCT patients in the historical control group. Groups were similar with regard to baseline demographics such as age, race, and gender. While allo-HCT patients were more likely to have leukemia and auto-HCT patients were more likely to have lymphoma and multiple myeloma, there were no differences in disease rates across the study periods. Allo-HCT patients in the intervention group had significantly higher average overall collection rates when compared to the historical control group allo-HCT patients (80% vs 37%, p Discussion: Our results demonstrate that even a modest incentive can significantly increase collection rates. Use of a contemporaneous control group to account for potential differences in stool collection rates over time strengthens our finding that financial incentives increase stool collection rates. Furthermore, the significant increase in collection rates in the outpatient setting highlights the role of the incentive when patient participation is needed, as opposed to the inpatient setting in which the nurse assists with collection. While this study uses a specialized HCT patient population, these results may be generalizable to future studies and aid other researchers in obtaining stool samples needed for future microbiome studies. Disclosures Peled: Seres Therapeutics: Other: IP licensing fees, Research Funding. van den Brink:Acute Leukemia Forum (ALF): Consultancy, Honoraria; Juno Therapeutics: Other: Licensing; Merck & Co, Inc.: Consultancy, Honoraria; Seres Therapeutics: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding; Therakos: Consultancy, Honoraria; Novartis: Consultancy, Honoraria; Flagship Ventures: Consultancy, Honoraria; Evelo: Consultancy, Honoraria; Jazz Pharmaceuticals: Consultancy, Honoraria; Amgen: Consultancy, Honoraria; Magenta and DKMS Medical Council: Membership on an entity's Board of Directors or advisory committees. Sung:Novartis: Research Funding; Merck: Research Funding; Seres: Research Funding.

Introduction: Geriatric assessment (GA) is a multidimensional evaluation of patient health and function that may detect impairments not identified as part of routine care, predict treatment-related morbidity and mortality, and inform treatment plans. Given evidence of these benefits, the National Comprehensive Cancer Network Clinical Practice Guidelines in Oncology (NCCN Guidelines®) recommend GA for older candidates of hematopoietic stem cell transplantation (HCT). However, both older and younger HCT candidates will often receive multiple rounds of chemotherapy before HCT, leading to functional impairments in all age groups. Furthermore, HCT patients often experience a significant gap between when they are first evaluated and actually proceed to transplant (e.g., while a donor search is conducted), creating an opportunity to identify impairments and optimize function prior to transplant. Methods: To address this opportunity, we created a clinical pre-HCT optimization program (C-POP) to evaluate physical function, cognitive function, nutritional status, and mental health in all adults who were deemed potential candidates for allogeneic HCT by a HCT physician. We applied this standard of care program to all adult candidates for HCT, regardless of age, with the goal of identifying functional impairments and then referring patients to services to optimize those impairments prior to HCT. We defined impairments using validated measures and compared results to established norms or scoring, controlling for age and gender where appropriate (e.g., the cut-off for six-minute walk distance was adjusted for age, gender, height, and weight, while the cut-off for falls was any fall regardless of characteristics). Patients with impairments were referred to the appropriate supportive care (e.g., physical function impairment -> referral to physical therapy). Results were prospectively analyzed at new patient evaluation (NPE), which was the first time the patient met a HCT physician and sign-off, which occurred within a week before starting transplant. While the program is ongoing, we present here the results of patients evaluated between October 16th, 2017 and July 1st, 2019. Patients are divided into three pre-specified age groups: =60 years old, with results compared using a chi-squared test. Results: We evaluated 115 patients: 21 (18%) =60 years). There were no differences between the age groups in other demographics (gender, race, and ethnicity). At NPE, 93 (81%) met criteria for at least 1 impairment in physical function, cognitive function, nutritional status, or mental health; 62 (54%) met criteria for impairments in 2 or more areas. Surprisingly, patients =60 years (36/54, 67%) (p=0.03). Of those 115 patients, 52 (45%) proceeded to HCT, including 12 (57%) =60 years (p=0.75); of those patients who have not proceeded to HCT, 40 (35%) will never proceed to HCT (e.g., deemed not a candidate after functional evaluation or died of disease prior to HCT) while 23 (20%) are still awaiting HCT (e.g., donor search ongoing). Patients who proceeded to HCT were less likely to have mental health impairments (2/52, 4% vs. 9/40, 23%, p=0.006). Of the 52 who were seen at new patient evaluation and proceeded to transplant, 40 (77%) were seen at sign off. Of those who had impairments at NPE, 12/23 (52%) improved their physical function to normal limits, 4/9 (44%) improved their cognitive function, and 9/13 (69%) improved their nutritional status by the time of sign-off (of those who were seen at sign-off, none had mental health impairments at NPE). Discussion: These results demonstrate that younger as well as older candidates for HCT exhibit a high degree of functional impairment. However, this impairment could be amenable to improvement prior to HCT. These findings support application of GA to all HCT candidates regardless of age. We will investigate the effect of referred interventions (e.g., physical therapy, seeing a dietician) in improving functional impairments in future studies, as well as look at the effect of these findings on HCT outcomes. Disclosures Wiggins: Incyte, Inc.: Speakers Bureau. Gasparetto:Janssen: Consultancy, Honoraria, Other: Travel, accommodations, or other expenses paid or reimbursed ; Celgene: Consultancy, Honoraria, Other: Travel, accommodations, or other expenses paid or reimbursed ; BMS: Consultancy, Honoraria, Other: Travel, accommodations, or other expenses paid or reimbursed . Rizzieri:Millennium: Speakers Bureau; Novartis: Consultancy; AbbVie: Consultancy; Pfizer: Consultancy; Amgen: Consultancy; Incyte: Consultancy, Speakers Bureau; TEVA: Consultancy; Spectrum: Consultancy; Kite Pharma: Consultancy; Gilead Sciences: Consultancy, Speakers Bureau; Seattle Genetics: Consultancy, Speakers Bureau; Jazz Pharmaceuticals: Speakers Bureau. Horwitz:Abbvie Inc: Membership on an entity's Board of Directors or advisory committees. Sung:Novartis: Research Funding; Merck: Research Funding; Seres: Research Funding.

Introduction: Allogeneic hematopoietic stem cell transplant (allo-HCT) remains the only curative treatment for many hematologic conditions. However, significant mortality risk and risk of severe graft-vs-host disease (GvHD) limit its usefulness. Some patient characteristics such as performance status are used routinely as prognostic markers for poor outcomes after transplant. Steatohepatitis is a metabolic dysfunction manifesting as increased hepatic adiposity and resulting inflammation. A pre-clinical murine study suggests steatohepatitis is associated with GvHD. We assessed whether pre-HCT hepatic steatosis was associated with risk of developing GvHD and post transplant mortality. Methods: This retrospective study reviewed adult patients who underwent allogeneic stem cell transplants at Duke University over a 10-year period between 2008 and 2017 and had a computed tomography scan (CT) of the abdomen and pelvis with contrast within a 1-year period preceding the transplant. Patients with an acute illness as the indication for CT were excluded. We measured the attenuation of the liver vs. spleen as an estimate of hepatic steatosis. We used the widely accepted definition of hepatic steatosis as present when the difference in average attenuation between the spleen and liver was greater than or equal to 10 Hounsfield units and as absent when the difference was less than 10 Hounsfield units. Baseline pre-HCT factors as well as post-HCT outcomes were abstracted from the medical record. Results: We identified 80 patients with pre-HCT CT scans; of those, 59 (74%) had hepatic steatosis as defined above. Patients with hepatic steatosis tended to be older (median 52 vs. 38 years, p=0.0522); there were no statistically significant differences in gender, race, ethnicity, height, weight, Karnofsky Performance Status, HCT Comorbidity Index, history of diabetes, history of coronary artery disease, history of elevated liver function tests, primary disease, conditioning regimen, or stem cell source. Hepatic steatosis did not predict acute GvHD grade II-IV (OR 1.003, 95% CI 0.259 - 3.888, p=0.997). However, it was significantly associated with chronic GvHD on both univariate as well as multivariate analysis (Table 1, multivariate OR 3.83, 95% CI 1.11 - 13.28, p=0.023). There was no difference in overall survival or non-relapse mortality between the two groups. Conclusions: This study suggests that hepatic steatosis may predict chronic GvHD but does not predict acute GvHD or overall/non-relapse mortality. This study can be improved by using other imaging techniques such as a noncontrast CT, which is more accurate for assessment of hepatic steatosis. It is also important to note that imaging can only be used to predict the existence of hepatic steatosis; lobular inflammation, which is required to diagnose steatohepatitis, can only be proven on biopsy. Larger studies with liver biopsy or other noninvasive imaging measures of liver stiffness and steatosis will be needed to confirm the above results. Disclosures Gasparetto: Celgene: Consultancy, Honoraria, Other: Travel, accommodations, or other expenses paid or reimbursed ; Janssen: Consultancy, Honoraria, Other: Travel, accommodations, or other expenses paid or reimbursed ; BMS: Consultancy, Honoraria, Other: Travel, accommodations, or other expenses paid or reimbursed . Horwitz:Abbvie Inc: Membership on an entity's Board of Directors or advisory committees. Rizzieri:Gilead Sciences: Consultancy, Speakers Bureau; Pfizer: Consultancy; Novartis: Consultancy; Millennium: Speakers Bureau; Jazz Pharmaceuticals: Speakers Bureau; AbbVie: Consultancy; Spectrum: Consultancy; Kite Pharma: Consultancy; Incyte: Consultancy, Speakers Bureau; TEVA: Consultancy; Seattle Genetics: Consultancy, Speakers Bureau; Amgen: Consultancy. Bashir:Metacrine, Inc.: Research Funding; ProSciento, Inc.: Research Funding; Pinnacle Clinical Research: Research Funding; CymaBay Therapeutics: Research Funding; Siemens Healthcare: Research Funding; NGM Biopharmaceuticals: Research Funding; Madrigal Pharmaceulticals: Research Funding. Sung:Novartis: Research Funding; Merck: Research Funding; Seres: Research Funding.

Allogeneic hematopoietic stem cell transplant (HCT) is a lifesaving procedure; however, it is associated with significant morbidity, and treatment-related mortality ranges from 10-30%. Morbidity and mortality have been associated with poor functional status. The geriatric assessment (GA) may allow identification of deficits pre-HCT, allowing intervention and improvement. While focused on older adults, we hypothesize that GA may also identify deficits in younger patients who may be debilitated by chemotherapy or cancer before HCT. We performed a GA in all adult patients at the time of initial evaluation for HCT (between 10/1/17-1/31/19) and again immediately before HCT. Deficits were identified and patients referred to specialists (physical therapy, neuropsychology, etc.) prior to HCT. Among 83 patients, the median age was 58 years (age range: 19-75), 59 (71%) had ≥1 deficits, including 41 (49%) had ≥2 deficits that required referral. The most common deficit was physical function (45, 54%), followed by cognitive function (29, 35%), nutrition (26, 31%), and mental health (7, 8%). Deficits were common across all age groups: 9/16 (56%) 60 years old. To date, 40 patients have undergone HCT; of the 24 with deficits at initial evaluation, 10 (42%) improved at least one deficit, 5 (21%) were unchanged, and 9 (38%) not evaluated. Physical and nutrition deficits were most responsive to intervention. These results suggest that there is a high degree of impairment prior to HCT among both older and younger patients; however, these deficits are amenable to improvement prior to HCT.

7047Background: Early prediction of response in acute myeloid leukemia (AML) patients undergoing cytotoxic chemotherapy may have clinical utility. Currently, measurable residual disease (MRD) testi...

Introduction: Patients receiving autologous (auto) and allogeneic (allo) hematopoietic stem cell transplantation (HCT) typically undergo extensive inpatient hospitalizations, daily "day hospital" visits, or a combination of the two. This aspect of transplant poses a variety of challenges, ranging from nosocomial infections to hospital-induced delirium to lifestyle adjustments. By keeping patients at home, we may lower complications and improve quality of life, as well as potentially lower costs and resource utilization. Methods: We conducted a phase 1 study of home HCT to investigate the safety and feasibility of implementing this strategy in the United States. Patients interested in participating needed to live within a 30 minute drive of a transplant center and underwent a home inspection to assess suitability and safety (e.g. absence of black mold). Eligible patients would still receive pre-transplant conditioning at the hospital or day hospital, but they would be discharged home after receiving their stem cell infusion. The goal was to keep trial participants at home for the duration of transplant. In the morning, nurse practitioners or physician assistants made daily house calls to conduct assessments, examine patients, and draw blood for laboratory studies. These studies were run at the hospital, and in the afternoon a nurse returned to the patient's home to provide home blood transfusions, home intravenous fluids, electrolytes, or antibiotics, or other interventions. If an acute event occurred that could not be safely managed at home (e.g. first evaluation of febrile neutropenia), patients returned to the hospital or day hospital for further workup and care. Likewise, patients returned to the hospital or day hospital for certain routine procedures, such as intravenous methotrexate given as part of graft-versus-host disease prophylaxis or first blood transfusion to ensure there were no reactions. Transplant outcomes were monitored by the medical team throughout the patient's care and confirmed by a clinical research nurse or specialist by chart review. Stool samples, to assess changes in the gut microbiome, were collected at baseline and weekly for the first four weeks, at day 60, 100, and day 180. Samples will undergo 16s rRNA sequencing to identify the taxonomic groups of bacteria present in the gut. Results: Twenty-two patients received home HCT (Table 1). This included 6 allos and 16 autos. Ages ranged from 34-63 years for allos and 46-74 years for autos. In both groups, 2/3 or more of patients had a baseline Karnofsky Performance Status of 70 or 80. Patients in the allo group spent 72% of their days entirely at home, while patients in the auto group spent 52% of their days at home. The main reason for returning to the hospital or day hospital were febrile neutropenia (4 allos and 9 autos). Aside from CMV reactivation (3 of 6 allos, 50%), only 2 allos (33%) and 2 autos (13%) developed bloodstream infections. Three allos developed GVHD; interestingly, these were the three patients that spent the most time in the hospital/day hospital even prior to Day 30 (median 23 days vs. 11 days), even prior to development of GVHD. There was one case of treatment-related mortality (GVHD) in the entire cohort. Overall, patients and their caregivers endorsed the program, providing numerous expressions of appreciation and gratitude on exit interviews, and quality of life was well-preserved as assessed by FACT-BMT: median scores for autos stayed the same when comparing baseline (median 113) to day 30 (median 114) and increased on day 100 (median 124). Discussion: Our results suggest that home HCT is safe and feasible. Despite including mostly older adults with suboptimal performance status, patients did quite well at home. They were able to maintain their quality of life and had low rates of infectious complications. Though patients did have to return to the hospital or day hospital at various times during transplant, keeping patients out of the hospital for even half the duration of transplant could have tremendous cost savings that would offset the increased staffing and travel required for house calls. Studies of the gut microbiome are pending to test the hypothesis that home HCT will preserve the gut microbiome, thereby preventing GVHD. In addition, a randomized phase 2 study of home vs. standard transplant for allogeneic HCT is currently in progress. Disclosures Sung: Novartis: Research Funding; Merck: Research Funding; Cellective: Research Funding. Gasparetto: Janssen, BMS, Celgene: Consultancy; Janssen, BMS, Celgene: Other: Travel, accommodations, or other expenses paid or reimbursed; Celgene: Research Funding; Janssen, BMS, Celgene, Takeda: Honoraria. Rizzieri: Shire: Research Funding; Erytech: Research Funding.