Thymic stromal lymphopoietin blocks early stages of breast carcinogenesis

Advances in the field of cancer immunology, including studies on tumor-infiltrating CD8(+) cytotoxic T lymphocytes (CTLs), have led to new immunotherapeutics with proven efficacy against late-stage cancers. However, the antitumor potential of the immune system in targeting early-stage cancers remains uncertain. Here, we demonstrated that both genetic and chemical induction of thymic stromal lymphopoietin (TSLP) at a distant site leads to robust antitumor immunity against spontaneous breast carcinogenesis in mice. Breast tumors exposed to high circulating levels of TSLP were arrested at an early adenoma-like stage and were prevented from advancing to late carcinoma and metastasis. Additionally, CD4(+) Th2 cells mediated the antitumor effects of TSLP, challenging the notion that Th2 cells only promote cancer. We also discovered that TSLP is expressed by the breast tumor cells themselves and acts to block breast cancer promotion. Moreover, TSLP-induced immunity also blocked early stages of pancreatic cancer development. Together, our findings demonstrate that TSLP potently induces immunity directed against early stages of breast cancer development without causing inflammation in the normal breast tissue. Moreover, our results highlight a previously unappreciated function of the immune system in controlling the early development of cancer and establish a fundamental role for TSLP and Th2 cells in tumor immunity against early-stage cancers

Human Antibodies that Slow Erythrocyte Invasion Potentiate Malaria-Neutralizing Antibodies.

The Plasmodium falciparum reticulocyte-binding protein homolog 5 (PfRH5) is the leading target for next-generation vaccines against the disease-causing blood-stage of malaria. However, little is known about how human antibodies confer functional immunity against this antigen. We isolated a panel of human monoclonal antibodies (mAbs) against PfRH5 from peripheral blood B cells from vaccinees in the first clinical trial of a PfRH5-based vaccine. We identified a subset of mAbs with neutralizing activity that bind to three distinct sites and another subset of mAbs that are non-functional, or even antagonistic to neutralizing antibodies. We also identify the epitope of a novel group of non-neutralizing antibodies that significantly reduce the speed of red blood cell invasion by the merozoite, thereby potentiating the effect of all neutralizing PfRH5 antibodies as well as synergizing with antibodies targeting other malaria invasion proteins. Our results provide a roadmap for structure-guided vaccine development to maximize antibody efficacy against blood-stage malaria. Copyright © 2019 The Author(s). Published by Elsevier Inc. All rights reserved

Differences in accessing dermatology offices, primary care offices, and emergency departments between Hispanics and Non-Hispanic White Patients

How Hispanic patients access dermatologic care for skin diseases is unknown. This study aims to determine if differences exist in accessing the emergency department (ED), primary care, and outpatient dermatologic offices for skin diseases between Hispanic and non-Hispanic White patients. This cross-sectional study used nationally representative data from the Medical Panel Expenditure Survey (MEPS) from 2016-2019. A total of 109,337,668 (weighted) patients with any skin disease diagnosed at an ED, primary care, or dermatology visit were identified. Hispanics comprised 13.0% and non-Hispanic Whites comprised 68.8% of this subpopulation. Overall, 94.1% of Hispanic patients attended a primary care visit for their skin complaint, 5.8% saw a dermatologist, and 0.1% attended an ED visit. Compared to non-Hispanic Whites, Hispanics were more likely to attend a primary care visit (aOR 1.865; 95%CI, 1.640-2.122) and less likely to attend an outpatient dermatology visit (aOR 0.536; 95%CI, 0.471-0.610), after adjusting for insurance status, education, income, sex, age, and comorbidities. Our study suggests that, compared to non-Hispanic Whites, Hispanic patients access primary care more frequently and outpatient dermatologic offices less frequently for their skin conditions. Language barriers, less familiarity with the healthcare system, and lack of adequate health insurance may play roles in this observation

2021 GRAPPA Meet the Experts Session: A Summary of Presentations.

The Group for Research and Assessment of Psoriasis and Psoriatic Arthritis hosted a Meet the Experts session at its 2021 virtual meeting. Dermatology and rheumatology experts held 5 sessions that broadly centered on psoriasis and psoriatic arthritis