Plasma IL13Rα2 as a novel liquid biopsy biomarker for glioblastoma.

PURPOSE: Glioblastoma (GBM) is the most common and deadliest brain tumor with unrelenting and rapid disease progression. The standard of care for GBM is surgical excision followed by radiation with concurrent and adjuvant temozolomide-centered chemotherapy (TMZ). Treatment failure and resistance is the rule and despite advances in imaging technology, early detection of treatment failure or impending resistance remains a challenge. There is a dire, unmet, need in clinical practice for minimally-invasive diagnostic tools to enable timely understanding of disease progression and treatment response. Here, we aim to address this clinical need by leveraging a unique characteristic of GBM: the overexpression of the α2 variant of the IL-13 receptor in over 75% of GBM tumors. METHODS: In this study we examined patients with primary GBM from Penn State and Cleveland Clinic compared to healthy controls. RESULTS: IL13Rα2 was detectable in plasma of GBM patients using ELISA but detection could be optimized by PEG precipitation to enrich for extracellular vesicles (EVs). Patients with GBM had elevated levels of plasma IL13Rα2, which correlated to levels of this receptor in the tumor tissue. Elevated plasma levels of IL13Rα2 predicted longer overall survival (OS) (19.8 vs. 13.2 months). Similarly, detection of IL13Rα2 + cells in tumor tissue also predicted longer OS (22.1 vs. 12.2 months). CONCLUSION: These findings strongly suggest that expression of the IL13Rα2 receptor confer survival advantage in GBM patients, which can be determined through a minimally-invasive liquid biopsy. Detection of plasma IL13Rα2 can also be used to select GBM patients for targeted tumor therapy.

Group-led creative writing and behavioural health in cancer: a randomised clinical trial.

BACKGROUND: Cancer diagnosis can adversely affect mental well-being and overall clinical outcome. We evaluated the efficacy of a group-led creative writing workshop (CWW) on mood in patients with cancer prospectively. METHODS: We conducted a single-institution phase II study. Sixty adult patients with cancer (any type or stage) were randomised 2:1 to CWW (4×CWW sessions, bimonthly over 8 weeks) versus active control (AC) (independent writing at home with the help of a book, four sessions, bimonthly over 8 weeks). The total study duration was 6 months with a follow-up of up to 3 months. PRIMARY OBJECTIVE: changes in overall mood, depression and anxiety symptoms before and after intervention in both arms. Emotional Thermometer Scale (ETS) was used to assess changes in patients' mood. Additionally, the Patient Health Questionnaire (PHQ)-9 and General Anxiety Disorder Scale (GAD)-7 were used to evaluate depression and anxiety symptoms. RESULTS: Of 50 evaluable patients (CWW 34, AC 17), 26 patients in the CWW arm attended at least one class and 19 attended at least four classes. Patients in CWW had significant immediate improvement in the overall ETS (post vs preclass scores; p<0.0001, 95% CI -4.31 to -2.47). Four of the five subscale ETS scores were significantly lower for the CWW arm: distress (p=0.0346, 95% CI -2.6 to -0.1), anxiety (p=0.0366, 95% CI -4.1 to -0.2), depression (p=0.0441, 95% CI -3.9 to -0.1) and anger (p=0.0494, 95% CI -3.3 to 0). No significant differences were seen in the AC arm. No significant differences were observed in the PHQ-9 or the GAD-7 scores. CONCLUSION: CWW had a positive effect on mood based on ETS scores, suggesting a potential therapeutic benefit among patients with cancer.

Effect of creative writing on mood in patients with cancer.

OBJECTIVE: To determine the feasibility of conducting creative writing workshops (CWW) for patients with cancer to promote improvement in mood. METHOD: We piloted a prospective study to determine the feasibility of conducting CWW over a 4-week period. Patients were randomised 2:1 to either an intervention arm (IA) or to standard of care (SOC). Patients in the IA attended four 2-hour long weekly CWW × 4 weeks, whereas those receiving SOC did not participate in the CWW. We used a validated emotion thermometer scale (ETS) to assess changes in patient's mental health before and after intervention. Patients with metastatic or unresectable cancer were included. PRIMARY ENDPOINT: (1) Feasibility and (2) mood scores before and after CWW using ETS. RESULTS: A total of 16 patients were enrolled: 11 in the IA vs 5 in SOC. Seven out of 11 (63%) patients enrolled in the IA attended at least 75% of classes. Patients in the IA showed a trend towards mood improvement relative to the SOC when comparing initial and final ETS scores. Within the IA group significantly lower postclass total ETS scores were observed relative to preclass ETS scores. Also, a significant decreasing trend over time was observed in the preclass total ETS scores for participants in the IA group. CONCLUSIONS: It is feasible for patients with cancer to attend CWW. Our results also show a positive effect on mood in the CWW arm. Further prospective clinical studies are needed to evaluate the effect of this intervention in patients with cancer.

Sexually dimorphic impact of the iron-regulating gene, HFE, on survival in glioblastoma.

BACKGROUND: The median survival for patients with glioblastoma (GBM), the most common primary malignant brain tumor in adults, has remained approximately 1 year for more than 2 decades. Recent advances in the field have identified GBM as a sexually dimorphic disease. It is less prevalent in females and they have better survival compared to males. The molecular mechanism of this difference has not yet been established. Iron is essential for many biological processes supporting tumor growth and its regulation is impacted by sex. Therefore, we interrogated the expression of a key component of cellular iron regulation, the HFE (homeostatic iron regulatory) gene, on sexually dimorphic survival in GBM. METHODS: We analyzed TCGA microarray gene expression and clinical data of all primary GBM patients (IDH-wild type) to compare tumor mRNA expression of HFE with overall survival, stratified by sex. RESULTS: In low HFE expressing tumors (below median expression, n = 220), survival is modulated by both sex and MGMT status, with the combination of female sex and MGMT methylation resulting in over a 10-month survival advantage (P < .0001) over the other groups. Alternatively, expression of HFE above the median (high HFE, n = 240) is associated with significantly worse overall survival in GBM, regardless of MGMT methylation status or patient sex. Gene expression analysis uncovered a correlation between high HFE expression and expression of genes associated with immune function. CONCLUSIONS: The level of HFE expression in GBM has a sexually dimorphic impact on survival. Whereas HFE expression below the median imparts a survival benefit to females, high HFE expression is associated with significantly worse overall survival regardless of established prognostic factors such as sex or MGMT methylation.