All Publications

  • Breast Cancer Diagnosis, Treatment, and Outcomes of Patients From Sex and Gender Minority Groups. JAMA oncology Eckhert, E., Lansinger, O., Ritter, V., Liu, M., Han, S., Schapira, L., John, E. M., Gomez, S., Sledge, G., Kurian, A. W. 2023


    Sexual orientation and gender identity data are not collected by most hospitals or cancer registries; thus, little is known about the quality of breast cancer treatment for patients from sex and gender minority (SGM) groups.To evaluate the quality of breast cancer treatment and recurrence outcomes for patients from SGM groups compared with cisgender heterosexual patients.Exposure-matched retrospective case-control study of 92 patients from SGM groups treated at an academic medical center from January 1, 2008, to January 1, 2022, matched to cisgender heterosexual patients with breast cancer by year of diagnosis, age, tumor stage, estrogen receptor status, and ERBB2 (HER2) status.Patient demographic and clinical characteristics, as well as treatment quality, as measured by missed guideline-based breast cancer screening, appropriate referral for genetic counseling and testing, mastectomy vs lumpectomy, receipt of chest reconstruction, adjuvant radiation therapy after lumpectomy, neoadjuvant chemotherapy for stage III disease, antiestrogen therapy for at least 5 years for estrogen receptor-positive disease, ERBB2-directed therapy for ERBB2-positive disease, patient refusal of an oncologist-recommended treatment, time from symptom onset to tissue diagnosis, time from diagnosis to first treatment, and time from breast cancer diagnosis to first recurrence. Results were adjusted for multiple hypothesis testing. Compared with cisgender heterosexual patients, those from SGM groups were hypothesized to have disparities in 1 or more of these quality metrics.Ninety-two patients from SGM groups were matched to 92 cisgender heterosexual patients (n = 184). The median age at diagnosis for all patients was 49 years (IQR, 43-56 years); 74 were lesbian (80%), 12 were bisexual (13%), and 6 were transgender (6%). Compared with cisgender heterosexual patients, those from SGM groups experienced a delay in time from symptom onset to diagnosis (median time to diagnosis, 34 vs 64 days; multivariable adjusted hazard ratio, 0.65; 95% CI, 0.42-0.99; P = .04), were more likely to decline an oncologist-recommended treatment modality (35 [38%] vs 18 [20%]; multivariable adjusted odds ratio, 2.27; 95% CI, 1.09-4.74; P = .03), and were more likely to experience a breast cancer recurrence (multivariable adjusted hazard ratio, 3.07; 95% CI, 1.56-6.03; P = .001).This study found that among patients with breast cancer, those from SGM groups experienced delayed diagnosis, with faster recurrence at a 3-fold higher rate compared with cisgender heterosexual patients. These results suggest disparities in the care of patients from SGM groups and warrant further study to inform interventions.

    View details for DOI 10.1001/jamaoncol.2022.7146

    View details for PubMedID 36729432

  • Time to resolution of iodine-123 metaiodobenzylguanidine (123 I-MIBG) avidity and local control outcomes for high-risk neuroblastoma following radiation therapy. Journal of medical imaging and radiation oncology Oh, J., Gutkin, P., Wang, Y. P., Sandhu, N., Majzner, R. G., Nadel, H., Shimada, H., Lansinger, O., von Eyben, R., Donaldson, S., Bruzoni, M., Sodji, Q. H., Hiniker, S. M. 2022


    INTRODUCTION: 123 I-MIBG scan is used in neuroblastoma (NB) to monitor treatment response. Time to resolution of 123 I-MIBG avidity after radiation therapy (RT) is unknown. We sought to determine time to resolution of 123 I-MIBG avidity after RT and local failure (LF) rate.METHODS: We performed a retrospective review of children with high-risk NB who underwent 123 I-MIBG scans pre- and post-RT from 2003 to 2019. Time from RT to resolution of 123 I-MIBG activity was analysed. LF and cumulative incidence of local progression (CILP) after RT stratified by site, presence of residual disease and use of boost RT were determined.RESULTS: Forty-two patients with median age 3.9years (1.9-4.7years) were included, with median follow-up time 3.9years (1.4-6.9). Eighty-six lesions were treated with RT to median dose of 21.6Gy. Eighteen of 86 lesions were evaluable for time to resolution of MIBG avidity after RT, with median resolution time of 78days (36-208). No LF occurred among 26 patients who received RT to primary sites after GTR, versus 4/12 (25%) patients treated with residual primary disease. 2-year CILP was 19% (12% primary disease 25% metastatic disease (P=0.18)). 2-year CILP for non-residual primary, residual primary, non-residual metastatic and residual metastatic lesions was 0%, 42%, 11% and 30% respectively (P=0.01) and for boosted and non-boosted residual lesions was 29% and 35% (P=0.44).CONCLUSION: Median time to MIBG resolution after RT was 78days. Primary lesions without residual disease had excellent local control. LF rate was higher after RT for residual disease, with no benefit for boost RT.

    View details for DOI 10.1111/1754-9485.13487

    View details for PubMedID 36300562

  • A case-control study of healthcare disparities in sex and gender minority patients with breast cancer. Eckhert, E., Lansinger, O., Liu, M., Purington, N., Han, S. S., Schapira, L., Sledge, G. W., Kurian, A. W. LIPPINCOTT WILLIAMS & WILKINS. 2022
  • Do Steroids Matter? A Retrospective Review of Premedication for Taxane Chemotherapy and Hypersensitivity Reactions. Journal of clinical oncology : official journal of the American Society of Clinical Oncology Lansinger, O. M., Biedermann, S., He, Z., Colevas, A. D. 2021: JCO2101200


    PURPOSE: Despite the widespread use of the taxanes paclitaxel and docetaxel for a variety of cancers and their well-known association with hypersensitivity reactions (HSRs), there is still significant variation in the prescribing practices of steroids for premedication. Premedication almost always includes dexamethasone, which can be associated with multiple adverse effects if taken for extended periods of time. This study reviews the pattern of steroid premedication in patients who received paclitaxel or docetaxel at Stanford Cancer Institute between January 2010 and June 2020.METHODS: We used an electronic query of the electronic medical record followed up with a manual review of patient charts to ask whether we could find a correlation between steroid premedication dosing and the incidence or severity of HSRs with the first taxane dose. Variables considered included steroid dose and route, dose and type of taxane, clinical cancer group, sex, and race.RESULTS: Five thousand two hundred seventeen patients were identified as having received paclitaxel or docetaxel, and 3,181 met criteria for our analysis. There were 264 (8.3%) HSRs. In adjusted multivariate analysis, we found no correlation of HSR rate or severity among any of the variables evaluated except gynecology oncology clinic patients, who had an increased risk (hazard ratio [HR] 1.34) of HSRs overall and high-grade HSRs (HR 2.34), and female patients, who had a higher rate of HSRs overall (HR 1.26), but not high-grade HSRs.CONCLUSION: Neither dexamethasone dose nor route correlated with subsequent HSRs. Given the potential for adverse events from repeated high-dose steroids, our findings suggest that routine use of lower doses, such as a single 10 mg dose of dexamethasone, as premedication for taxanes to prevent HSRs is preferable to the current prescribing guidelines.

    View details for DOI 10.1200/JCO.21.01200

    View details for PubMedID 34357780

  • Aged hematopoietic stem cells are refractory to bloodborne systemic rejuvenation interventions JOURNAL OF EXPERIMENTAL MEDICINE Ho, T. T., Dellorusso, P., Verovskaya, E. V., Bakker, S. T., Flach, J., Smith, L. K., Ventura, P. B., Lansinger, O. M., Herault, A., Zhang, S., Kang, Y., Mitchell, C. A., Villeda, S. A., Passegue, E. 2021; 218 (7)


    While young blood can restore many aged tissues, its effects on the aged blood system itself and old hematopoietic stem cells (HSCs) have not been determined. Here, we used transplantation, parabiosis, plasma transfer, exercise, calorie restriction, and aging mutant mice to understand the effects of age-regulated systemic factors on HSCs and their bone marrow (BM) niche. We found that neither exposure to young blood, nor long-term residence in young niches after parabiont separation, nor direct heterochronic transplantation had any observable rejuvenating effects on old HSCs. Likewise, exercise and calorie restriction did not improve old HSC function, nor old BM niches. Conversely, young HSCs were not affected by systemic pro-aging conditions, and HSC function was not impacted by mutations influencing organismal aging in established long-lived or progeroid genetic models. Therefore, the blood system that carries factors with either rejuvenating or pro-aging properties for many other tissues is itself refractory to those factors.

    View details for DOI 10.1084/jem.20210223

    View details for Web of Science ID 000663429700003

    View details for PubMedID 34032859

    View details for PubMedCentralID PMC8155813

  • Autophagy maintains the metabolism and function of young and old stem cells NATURE Ho, T. T., Warr, M. R., Adelman, E. R., Lansinger, O. M., Flach, J., Verovskaya, E. V., Figueroa, M. E., Passegue, E. 2017; 543 (7644): 205-+


    With age, haematopoietic stem cells lose their ability to regenerate the blood system, and promote disease development. Autophagy is associated with health and longevity, and is critical for protecting haematopoietic stem cells from metabolic stress. Here we show that loss of autophagy in haematopoietic stem cells causes accumulation of mitochondria and an activated metabolic state, which drives accelerated myeloid differentiation mainly through epigenetic deregulations, and impairs haematopoietic stem-cell self-renewal activity and regenerative potential. Strikingly, most haematopoietic stem cells in aged mice share these altered metabolic and functional features. However, approximately one-third of aged haematopoietic stem cells exhibit high autophagy levels and maintain a low metabolic state with robust long-term regeneration potential similar to healthy young haematopoietic stem cells. Our results demonstrate that autophagy actively suppresses haematopoietic stem-cell metabolism by clearing active, healthy mitochondria to maintain quiescence and stemness, and becomes increasingly necessary with age to preserve the regenerative capacity of old haematopoietic stem cells.

    View details for DOI 10.1038/nature21388

    View details for Web of Science ID 000395688700031

    View details for PubMedID 28241143

    View details for PubMedCentralID PMC5344718