Search

Identification of circulating tumor DNA (ctDNA) following curative intent therapies is a surrogate for microscopic residual disease for patients with metastatic colorectal cancer (mCRC). Preclinically, in micrometastatic microsatellite stable (MSS) colorectal cancer, increased TGFβ signaling results in exclusion of antitumor cytotoxic T cells from the tumor microenvironment. Bintrafusp alfa (BA) is a bifunctional fusion protein composed of the extracellular domain of the TGFβRII receptor (“TGFβ trap”) and anti-PD-L1 antibody. Patients with liver-limited, MSS mCRC and with detected ctDNA after complete resection of all known tumors and standard-of-care therapy were treated with 1,200 mg of BA intravenously every 14 days for six doses. The primary endpoint was ctDNA clearance. Radiographic characteristics at recurrence were compared using independent t tests to historical data from a similar cohort of patients with liver-limited mCRC who underwent observation. Only 4 of 15 planned patients received BA before the study was stopped early for loss of equipoise. There was no grade ≥3 adverse event. None of the patients cleared ctDNA. All patients developed radiographic recurrence by the first planned restaging. Although not detectable at prior to treatment, TGFβ3 was found in circulation in all patients at cycle 2 day 1. Compared with a historical cohort, patients administered BA developed more metastases (15 vs. 2, P = 0.005) and greater tumor volumes (9 cm vs. 2 cm, P = 0.05). Treatment with BA in patients with ctDNA-detected, liver-limited mCRC did not clear ctDNA and was associated with large-volume recurrence, highlighting the potential context-specific complexity of dual TGFβ and PD-L1 inhibition. Significance: Use of ctDNA to identify patients with micrometastatic disease for therapeutic intervention is feasible. Treatment with BA in patients with liver-limited mCRC and with detectable ctDNA after resection generated rapid progression. Approaches targeting TGFβ signaling must consider its pathway complexity in future immunotherapy combination strategies.

Supplemental Figure S2

Supplemental Table S3

Identification of circulating tumor DNA (ctDNA) following curative intent therapies is a surrogate for microscopic residual disease for patients with metastatic colorectal cancer (mCRC). Preclinically, in micrometastatic microsatellite stable (MSS) colorectal cancer, increased TGFβ signaling results in exclusion of antitumor cytotoxic T cells from the tumor microenvironment. Bintrafusp alfa (BA) is a bifunctional fusion protein composed of the extracellular domain of the TGFβRII receptor (“TGFβ trap”) and anti-PD-L1 antibody. Patients with liver-limited, MSS mCRC and with detected ctDNA after complete resection of all known tumors and standard-of-care therapy were treated with 1,200 mg of BA intravenously every 14 days for six doses. The primary endpoint was ctDNA clearance. Radiographic characteristics at recurrence were compared using independent t tests to historical data from a similar cohort of patients with liver-limited mCRC who underwent observation. Only 4 of 15 planned patients received BA before the study was stopped early for loss of equipoise. There was no grade ≥3 adverse event. None of the patients cleared ctDNA. All patients developed radiographic recurrence by the first planned restaging. Although not detectable at prior to treatment, TGFβ3 was found in circulation in all patients at cycle 2 day 1. Compared with a historical cohort, patients administered BA developed more metastases (15 vs. 2, P = 0.005) and greater tumor volumes (9 cm vs. 2 cm, P = 0.05). Treatment with BA in patients with ctDNA-detected, liver-limited mCRC did not clear ctDNA and was associated with large-volume recurrence, highlighting the potential context-specific complexity of dual TGFβ and PD-L1 inhibition.Significance:Use of ctDNA to identify patients with micrometastatic disease for therapeutic intervention is feasible. Treatment with BA in patients with liver-limited mCRC and with detectable ctDNA after resection generated rapid progression. Approaches targeting TGFβ signaling must consider its pathway complexity in future immunotherapy combination strategies.

Comparison of overall survival based on primary tumor side using a multivariate proportional hazards model controlling for co-variates that differed based on tumor location.

Sensitivity analysis comparing mutation prevalence estimates by site of biopsy of tissue used for next generation sequencing panel in metastatic colorectal cancer.

Supplementary Fig S3. Association of gene size and the differential expression of IFN-γ pathway in genes commonly mutated in MSS CRC

Supplemental legend

Supplementary Table S1

Summary of the relative prognostic and mutational impact of tumor location in metastatic colorectal cancer. Sub-caption: Relative prevalence of mutations at each site was compared to the median prevalence across all sites and used to calculate relative font size for each gene name. Hazard ratios displayed in the figure utilize rectal location as the reference category.

Sensitivity analysis demonstrating optimal left vs right cut-point to maximize prognostic differences based on side in metastatic colorectal cancer. Sub-caption: Numbers in figure represent the hazard ratio followed by the 95% confidence interval within square brackets. The hazard ratio estimate occurs at the location used to divide left from right in each sensitivity analysis. For example, if the division between right and left occurs between the hepatic flexure and transverse colon, the hazard ratio estimate will be placed on the graph half way between the hepatic flexure and transverse colon (ie. 1.66).

Purpose: Colorectal cancers are classified as right/left-sided based on whether they occur before/after the splenic flexure, with established differences in molecular subtypes and outcomes. However, it is unclear if this division is optimal and whether precise tumor location provides further information.Experimental Design: In 1,876 patients with colorectal cancer, we compared mutation prevalence and overall survival (OS) according to side and location. Consensus molecular subtype (CMS) was compared in a separate cohort of 608 patients.Results: Mutation prevalence differed by side and location for TP53, KRAS, BRAFV600, PIK3CA, SMAD4, CTNNB1, GNAS, and PTEN. Within left- and right-sided tumors, there remained substantial variations in mutation rates. For example, within right-sided tumors, RAS mutations decreased from 70% for cecal, to 43% for hepatic flexure location (P = 0.0001), while BRAFV600 mutations increased from 10% to 22% between the same locations (P < 0.0001). Within left-sided tumors, the sigmoid and rectal region had more TP53 mutations (P = 0.027), less PIK3CA (P = 0.0009), BRAF (P = 0.0033), or CTNNB1 mutations (P < 0.0001), and less MSI (P < 0.0001) than other left-sided locations. Despite this, a left/right division preceding the transverse colon maximized prognostic differences by side and transverse colon tumors had K-modes mutation clustering that appeared more left than right sided. CMS profiles showed a decline in CMS1 and CMS3 and rise in CMS2 prevalence moving distally.Conclusions: Current right/left classifications may not fully recapitulate regional variations in tumor biology. Specifically, the sigmoid-rectal region appears unique and the transverse colon is distinct from other right-sided locations. Clin Cancer Res; 24(5); 1062–72. ©2017 AACR.See related commentary by Dienstmann, p. 989

The objective of this study is to describe the epidemiological features of each presentation with a primary dermatological diagnosis to a regional emergency department (ED).1-year retrospective audit.Regional Victorian hospital emergency department.Any presentation to this regional emergency department with a dermatological condition from 1 January 2020 to 31 December 2020.Dermatology presentations to the ED in 2020 and the prevalence of the associated primary diagnosis.In total, 4.7% (n = 1873) of ED presentations had a primary dermatological diagnosis. Of these, 1484 were ≥18 years of age and 389 were ≤17 years of age. Cellulitis (26.1%, n = 388) was the most common primary diagnosis among presentations ≥18 years. Non-specific rash was the most common diagnosis (23.6%, n = 92) in presentations ≤17 years. Indigenous Australians ≥18 years were more likely to be in a younger age group (p 0.01), and dermatitis/eczema presentations ≥18 years (n = 10) were the largest diagnostic group referred to a dermatologist. A total of 134 (7.1%) patients ≥18 years travelled more than 50 km to the ED. There were no dermatological emergencies identified.A high proportion of presentations to this regional ED with a dermatological diagnosis could be well managed by a dermatologist or general practitioner (GP) as an outpatient. The findings of this study inform the need for future rural public dermatology services. Options include teledermatology, or a public weekly or fortnightly rapid review dermatology clinic with a visiting dermatologist, in the absence of a dermatologist onsite.

Chronic exposure to Δ-9-tetrahydrocannabinol (THC) during adolescence is associated with long-lasting cognitive impairments and enhanced susceptibility to anxiety and mood disorders. Previous evidence has revealed functional and anatomical dissociations between the posterior vs. anterior portions of the hippocampal formation, which are classified as the dorsal and ventral regions in rodents, respectively. Notably, the dorsal hippocampus is critical for cognitive and contextual processing, whereas the ventral region is critical for affective and emotional processing. While adolescent THC exposure can induce significant morphological disturbances and glutamatergic signaling abnormalities in the hippocampus, it is not currently understood how the dorsal vs. ventral hippocampal regions are affected by THC during neurodevelopment. In the present study, we used an integrative combination of behavioral, molecular, and neural assays in a neurodevelopmental rodent model of adolescent THC exposure. We report that adolescent THC exposure induces long-lasting memory deficits and anxiety like-behaviors concomitant with a wide range of differential molecular and neuronal abnormalities in dorsal vs. ventral hippocampal regions. In addition, using matrix-assisted laser desorption/ionization imaging mass spectrometry (MALDI-IMS), we show for the first time that adolescent THC exposure induces significant and enduring dysregulation of GABA and glutamate levels in dorsal vs. ventral hippocampus. Finally, adolescent THC exposure induced dissociable dysregulations of hippocampal glutamatergic signaling, characterized by differential glutamatergic receptor expression markers, profound alterations in pyramidal neuronal activity and associated oscillatory patterns in dorsal vs. ventral hippocampal subregions.

Objectives: Suicide is a leading cause of maternal mortality. Suicidality during and around the time of pregnancy can have detrimental impacts on a child’s development and outcomes. This paper examines prevalence, demographic characteristics, and timing of initial contact with first responders and health services for a cohort of women who experienced suicidality during and around the time of pregnancy. Methods: Findings are drawn from the Partners in Prevention (PiP) study, a population-wide linked data set of suicide-related attendances by police or paramedics in Queensland, Australia. A sub-cohort of women was identified, who were between 6 months preconception and 2 years postpartum at the time of a suicide-related contact with police or paramedics (PiP-Maternal). Findings are compared to other girls and women who had a suicide-related contact with police or paramedics (PiP-Female). Prevalence, demographic characteristics, timing of contact with first responders and health services, re-presentations, and mortality are reported. Results: The PiP-Maternal cohort comprised 3020 individuals and 3400 births. Women in the PiP-Maternal cohort were younger, more likely to be of Aboriginal and/or Torres Strait Islander descent and live outside of a major city than the PiP-Female cohort. There were high rates of out-of-hours calls to police and ambulance, and similar perceived seriousness of the call between women in the PiP-Maternal and PiP-Female cohorts. Women in the PiP-Maternal cohort were less likely to be admitted to an emergency department within 24 hours, even after matching on covariates. Prevalence of suicidality for women who were pregnant and up to 2 years postpartum was 1.32% (95% CI = [1.27, 1.37]). Conclusion: Vulnerabilities and high rates of contact with police or paramedics, coupled with lower levels of follow-up, highlight the critical need to improve service responses for women with mental health needs during these phases of life.

It is difficult to explain why verbal street harassment, where typically a male harasser yells sexually harassing statements at a female victim, has survived as a behaviour. We propose that verbal street harassment may signal a harasser’s dominance and aimed to test this in our registered report. Participants (N = 443) read one of two vignettes describing either a street harassment incident (in which a male perpetrator harasses a female victim) or a street incident without harassment. Participants were asked to evaluate whether the male target possessed a range of traits (including dominance) and to evaluate any harm the female target suffered from the incident. Results suggested that the male target who verbally harassed a female victim on the street was perceived by participants as more dominant and as having a darker personality than a male target who did not engage in street harassment. Participants also perceived the female target as more harmed when she was harassed. However, results did not support the predicted interaction of participant sex and incident type on participants’ perceptions of the male and female targets. These results suggest that verbal street harassment may signal a harasser’s dominance which may be why the behaviour has been maintained. To establish whether verbal street meets the conditions to be classed as a costly signal, these findings should be replicated and extended. Understanding why street harassment persists as a behaviour is critical to designing effective intervention to prevent street harassment and protect harassment victims.

This phase I study was conducted to evaluate the safety and Maximum Tolerated Dose of PENAO (4-(N-(S-penicillaminylacetyl)amino)-phenylarsonous acid), a second-generation organic arsenical with anti-mitochondrial activity, when given as a continuous intravenous infusion (CIVI), in patients with advanced solid tumours. Eligibility criteria for this trial included age ≥ 18 years, advanced solid tumour, ECOG Performance Status ≤ 1 and adequate organ function. PENAO was administered by CIVI, with dose levels initially increased by infusion duration in a 21-day cycle at a fixed daily dose and then increased daily dose. Standard dose-limiting toxicity (DLT) definitions were used in a “3 + 3” design. Patients had regular monitoring of toxicity and efficacy. Pharmacokinetic assays of serum and urine As were performed. Twenty-six patients were treated across 8 dose levels. The only dose-limiting toxicity (DLT) observed was fatigue, that occurred in one patient treated at the highest dose level of 9 mg/m2/day. No significant organ toxicity or objective responses were observed, although there were two patients with stable disease lasting up to 7 months. Pharmacokinetic analysis unexpectedly indicated a half-life of 9–19 days, invalidating the CIVI dosing resulting in discontinuation of the study before the RP2D was defined. PENAO was administered by CIVI at dose levels up to 9 mg/m2/day with only one DLT noted. Pharmacokinetic studies invalidated the rationale for continuous dosing and led to discontinuation of the trial without defining a RP2D. Future clinical development of PENAO will use intermittent dosing schedule, alone and in combination with rapamycin.

Background and Objective: Recruiting and retaining male donors remain an ongoing challenge for blood collection agencies. Research suggests that interventions based on costly signalling theory that allows donors to unobtrusively but publicly signal their donor status may be effective. However, what functions as such a signal and how it is interpreted has not been determined.Materials and Methods: A total of 242 Australian residents (127 female; 115 male) recruited through an online research platform rated their perceptions of a male target wearing (a) no bandage, (b) a regular unmarked bandage or (c) a blood donor branded bandage.Results: The target wearing a blood donor branded bandage was rated as significantly more generous by female participants and moral compared to both the target who wore no bandage and the target wearing a regular unmarked bandage. The target wearing the unmarked bandage was perceived as significantly less healthy and competent compared to the target not wearing a bandage.Conclusion: A public signal of public donor status conveys the generosity and morality of the wearer. The bandage applied to donors after they have donated can act as such an effective signal, but only when these bandages are clearly branded as resulting from donating blood.

To evaluate the patterns of financial transaction between industry and urologists in the first 5 years of reporting in the Open Payments Program (OPP) by comparing transactions over time, between academic and nonacademic urologists, and by provider characteristics among academic urologists.The Center for MedicareMedicaid Services OPP database was queried for General Payments to urologists from 2014-2018. Faculty at ACGME-accredited urology training programs were identified and characterized via publicly available websites. Industry transfers were analyzed by year, practice setting (academic vs nonacademic), provider characteristics, and AUA section. Payment nature and individual corporate contributions were also summarized.A total of 12,521 urologists - representing 75% of the urology workforce in any given year - received $168 million from industry over the study period. There was no significant trend in payments by year (P = .162). Urologists received a median of $1602 over the study period, though 14% received$10,000. Payment varied significantly by practice setting (P.001), with nonacademic urologists receiving more but smaller payments than academic urologists. Among academic urologists, gender (P.001), department chair status (P.001), fellowship training (P.001), and subspecialty (P.001) were significantly associated with amount of payment from industry. Annual payments from industry varied significantly by AUA section.Reporting of physician-industry transactions has not led to a sustained decline in transactions with urologists. Significant differences in industry interaction exist between academic and nonacademic urologists, and values transferred to academic urologists varied by gender, chair status, subspecialty, and AUA section.

Human activity has led to widespread chemical alteration of natural environments. Aquatic ecosystems are especially susceptible to chemical changes, including those caused by runoff and invasive sp...

Motivation DNA methylation is a key epigenetic factor regulating gene expression. While promoter methylation has been well studied, recent publications have revealed that functionally important methylation also occurs in intergenic and distal regions, and varies across genes and tissue types. Given the growing importance of inter-platform integrative genomic analyses, there is an urgent need to develop methods to discover and characterize gene-level relationships between methylation and expression. Results We introduce a novel sequential penalized regression approach to identify methylation-expression quantitative trait loci (methyl-eQTLs), a term that we have coined to represent, for each gene and tissue type, a sparse set of CpG loci best explaining gene expression and accompanying weights indicating direction and strength of association. Using TCGA and MD Anderson colorectal cohorts to build and validate our models, we demonstrate our strategy better explains expression variability than current commonly used gene-level methylation summaries. The methyl-eQTLs identified by our approach can be used to construct gene-level methylation summaries that are maximally correlated with gene expression for use in integrative models, and produce a tissue-specific summary of which genes appear to be strongly regulated by methylation. Our results introduce an important resource to the biomedical community for integrative genomics analyses involving DNA methylation. Availability and implementation We produce an R Shiny app (https://rstudio-prd-c1.pmacs.upenn.edu/methyl-eQTL/) that interactively presents methyl-eQTL results for colorectal, breast and pancreatic cancer. The source R code for this work is provided in the Supplementary Material. Supplementary information Supplementary data are available at Bioinformatics online.

Pesticides are a ubiquitous contaminant in aquatic ecosystems. Despite the relative sensitivity of aquatic species to pesticides, growing evidence suggests that populations can respond to pesticides by evolving higher baseline tolerance or inducing a higher tolerance via phenotypic plasticity. While both mechanisms can allow organisms to persist when faced with pesticides, resource allocation theory suggests that tolerance may be related to resource acquisition by the organism. Using Daphnia pulex, we investigated how algal resource availability influenced the baseline and inducible tolerance of D. pulex to a carbamate insecticide, carbaryl. Individuals reared in high resource environments had a higher baseline carbaryl tolerance compared to those reared in low resource environments. However, D. pulex from low resource treatments exposed to sublethal concentrations of carbaryl early in development induced increased tolerance to a lethal concentration of carbaryl later in life. Only individuals reared in the low resource environment induced carbaryl tolerance. Collectively, this highlights the importance of considering resource availability in our understanding of pesticide tolerance.

Background Metastatic colorectal cancer (mCRC) is a highly heterogeneous disease from a clinical, molecular, and immunological perspective. Current predictive models rely primarily in tissue based genetic analysis, which not always correlate with inflammatory response. Here we evaluated the role of a circulating inflammatory signature as a prognostic marker in mCRC. Methods Two hundred eleven newly diagnosed patients with mCRC were enrolled in the study. One hundred twenty-one patients had unresectable metastases, whereas ninety patients had potentially resectable liver metastases at presentation. Analysis of miR-21, IL-6, and IL-8 in the plasma of peripheral blood was performed at baseline. Patients with high circulating levels of ≥2 of the three inflammation markers (miR-21, IL-6, and IL-8) were considered to have the “Inflammation phenotype-positive CISIG”. Results Positive CISIG was found in 39/90 (43%) and 50/121 (45%) patients in the resectable and unresectable cohort, respectively. In the resectable population the median relapse-free survival was 18.4 compared to 31.4 months (p = 0.001 HR 2.09, 95% CI 1.2–3.67) for positive vs. negative CISIG. In contrast, the individual components were not significant. In the same population the median overall survival was 46.2 compared to 66.0 months (p = 0.0003, HR 2.57, 95% CI 1.26–5.27) for positive vs. negative CISIG, but not significant for the individual components. In the unresectable population, the median overall survival was 13.5 compared to 25.0 months (p = 0.0008, HR 2.49, 95% CI 1.46–4.22) for positive vs. negative CISIG. IL-6 was independently prognostic with overall survival of 16.2 compared to 27.0 months (p = 0.004, HR 1.96, 95% CI 1.24–3.11) for high vs. low IL-6, but not the other components. Using a Cox regression model, we demonstrated that CISIG is an independent predictive marker of survival in patients with unresectable disease (HR 1.8, 95% CI 1.2, 2.8, p

The mucinous histologic subtype accounts for 5% to 20% of colorectal cancer (CRC) cases but remains poorly characterized. The present study characterized the baseline characteristics, mutational profile, and clinical outcomes of patients diagnosed with mucinous CRC.We identified 1877 patients with metastatic CRC with available histologic findings and molecular profiling and summarized the baseline clinical and pathologic characteristics and overall survival (OS) stratified by the histologic type. The data from separate cohorts with consensus molecular subtype (CMS) and CpG island methylator information were also summarized.The mucinous histologic type was found in 277 of the 1877 patients (14.8%) and was associated with an increased prevalence of microsatellite instability (P .001) and a right-sided primary (P .001). An increased frequency of CMS1 (microsatellite instability immune) and lower rates of CMS2 (canonical) were identified, with mucinous compared with nonmucinous adenocarcinoma (P .0001). Mutations in SMAD4 (P .001), GNAS (P .001), ERBB2 (P = .02), BRAF (P .001), and KRAS (P .001) occurred at greater frequencies in the mucinous CRC cases, and TP53 (P .001), APC (P .001), and NRAS mutations (P = .03) were less common. Univariate (hazard ratio [HR], 1.38; 95% confidence interval [CI], 1.17-1.63; P .001) and multivariate analysis (HR, 1.36; 95% CI, 1.12-1.64; P = .002) demonstrated that the mucinous histologic type is associated with worse OS. The features associated with the mucinous histologic subtype were independent predictors for shorter OS, including BRAF (HR, 1.74; 95% CI, 1.35-2.25; P .001) and KRAS (HR, 1.42; 95% CI, 1.22-1.65; P .001) mutations, right-sided location (HR, 1.20; 95% CI, 1.04-1.39; P = .01), and synchronous metastases (HR, 2.92; 95% CI, 2.49-3.42; P .001).Compared with nonmucinous adenocarcinoma, the mucinous histologic type is associated with a worse prognosis, even when controlling for known prognostic features. This unique biologic behavior should be considered in the treatment and prognostic assessment of patients with CRC.

Altruism: the desire to benefit others at a cost to the self is the most commonly frequently mentioned reason for donating blood. The behaviour itself, is without a doubt altruistic in the sense that it is unlikely there are any benefits that could outweigh the immediate cost of making the time and effort to give blood to an anonymous human. In studying the altruistic behaviour of donating blood, research has primarily focused on understanding the proximate level explanations of the behaviour. That is, what are the psychological mechanism that triggers the behaviour. However, altruistic behaviours, like all other human behaviours can also be understood from an ultimate perspective. That is, what evolutionary factors could explain the survival of the behaviour and their associated psychological mechanisms. This thesis considers an ultimate explanation of blood donation drawn from Costly Signalling Theory: donating blood also functions as a signal of underlying qualities. The aim of this thesis is to assess the applicability of using Costly Signalling Theory to understand blood donation.In Chapter 1, I provide an overview of research on the link between altruism and donating blood. I detail the importance of distinguishing between ultimate and proximate level explanations to develop a fuller understanding of the behaviour. I further outline the questions that needs to be answered before applying Costly Signalling Theory to develop recruitment intervention for blood donation. In Chapter 2, given the robust link between altruism and donating blood, I empirically test the levels of altruism underlying blood donors and non-donors. Subsequently, in Chapter 3, I examine the qualities signalled by donating blood compared to other forms of helping, such as donating money and volunteering. In Chapter 4, I assess the effectiveness of male blood donors signalling the qualities associated with donating blood (e.g., altruism, trustworthiness) through a subtly marked blood branded bandage. Chapter 5 explores the content communicated by blood donors who had successfully donated blood to understand possible signalling strategies in their communication. Finally, in Chapter 6 I draw together all these findings to discuss the applicability of using Costly Signalling Theory to understand blood donation, practical implications and future directions. Together, the thesis presents a program of research examining the traits signalled by donating blood and the methods that blood donation status could be effectively signalled.

Purpose: AT-rich interactive domain 1A (ARID1A) is commonly mutated in colorectal cancer, frequently resulting in truncation and loss of protein expression. ARID1A recruits MSH2 for mismatch repair during DNA replication. ARID1A deficiency promotes hypermutability and immune activation in preclinical models, but its role in patients with colorectal cancer is being explored. Experimental Design: The DNA sequencing and gene expression profiling of patients with colorectal cancer were extracted from The Cancer Genome Atlas and MD Anderson Cancer Center databases, with validation utilizing external databases, and correlation between ARID1A and immunologic features. IHC for T-cell markers was performed on a separate cohort of patients. Results: Twenty-eight of 417 patients with microsatellite stable (MSS) colorectal cancer (6.7%) had ARID1A mutation. Among 58 genes most commonly mutated in colorectal cancer, ARID1A mutation had the highest increase with frameshift mutation rates in MSS cases (8-fold, P < 0.001). In MSS, ARID1A mutation was enriched in immune subtype (CMS1) and had a strong correlation with IFNγ expression (Δz score +1.91, P < 0.001). Compared with ARID1A wild-type, statistically significant higher expression for key checkpoint genes (e.g., PD-L1, CTLA4, and PDCD1) and gene sets (e.g., antigen presentation, cytotoxic T-cell function, and immune checkpoints) was observed in mutant cases. This was validated by unsupervised differential expression of genes related to immune response and further confirmed by higher infiltration of T cells in IHC of tumors with ARID1A mutation (P = 0.01). Conclusions: The immunogenicity of ARID1A-mutant cases is likely due to an increased level of neoantigens resulting from increased tumor mutational burden and frameshift mutations. Tumors with ARID1A mutation may be more susceptible to immune therapy–based treatment strategies and should be recognized as a unique molecular subgroup in future immune therapy trials.