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. 2021 Feb 15;16(1):13.
doi: 10.1186/s13027-021-00347-6.

Low expression of NSD1, NSD2, and NSD3 define a subset of human papillomavirus-positive oral squamous carcinomas with unfavorable prognosis

Affiliations

Low expression of NSD1, NSD2, and NSD3 define a subset of human papillomavirus-positive oral squamous carcinomas with unfavorable prognosis

Steven F Gameiro et al. Infect Agent Cancer. .

Abstract

Background: Frequent mutations in the nuclear receptor binding SET domain protein 1 (NSD1) gene have been observed in head and neck squamous cell carcinomas (HNSCC). NSD1 encodes a histone 3 lysine-36 methyltransferase. NSD1 mutations are correlated with improved clinical outcomes and increased sensitivity to platinum-based chemotherapy agents in human papillomavirus-negative (HPV-) tumors, despite weak T-cell infiltration. However, the role of NSD1 and related family members NSD2 and NSD3 in human papillomavirus-positive (HPV+) HNSCC is unclear.

Methods: Using data from over 500 HNSCC patients from The Cancer Genome Atlas (TCGA), we compared the relative level of mRNA expression of NSD1, NSD2, and NSD3 in HPV+ and HPV- HNSCC. Correlation analyses were performed between T-cell infiltration and the relative level of expression of NSD1, NSD2, and NSD3 mRNA in HPV+ and HPV- HNSCC. In addition, overall survival outcomes were compared for both the HPV+ and HPV- subsets of patients based on stratification by NSD1, NSD2, and NSD3 expression levels.

Results: Expression levels of NSD1, NSD2 or NSD3 were not correlated with altered lymphocyte infiltration in HPV+ HNSCC. More importantly, low expression of NSD1, NSD2, or NSD3 correlated with significantly reduced overall patient survival in HPV+, but not HPV- HNSCC.

Conclusion: These results starkly illustrate the contrast in molecular features between HPV+ and HPV- HNSCC tumors and suggest that NSD1, NSD2, and NSD3 expression levels should be further investigated as novel clinical metrics for improved prognostication and patient stratification in HPV+ HNSCC.

Keywords: Epigenetics; HPV; Head and neck cancer; Head and neck squamous cell carcinoma; Histone methyltransferase; The Cancer Genome Atlas; WHSC1; WHSC1L1.

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Conflict of interest statement

The author reports no conflicts of interest in this work.

Figures

Fig. 1
Fig. 1
Expression of NSD1, NSD2, and NSD3 genes in HNSCC stratified by HPV status. Normalized RNA-seq data was extracted from TCGA database for the HNSCC cohort for HPV+, HPV-, and matched normal-adjacent control tissues. Numbers in brackets refer to the number of samples included in each analysis. Statistical p value significance levels are indicated as follows: * p ≤ 0.05; ** p ≤ 0.01; *** p ≤ 0.001; **** p ≤ 0.0001; ns – not significant
Fig. 2
Fig. 2
Correlation matrix of NSD paralogs and viral oncogene expression. Normalized RNA-seq data for NSD1, NSD2, NSD3, HPV E6, and HPV E7 was compared in a pairwise fashion for both the HPV+ (left) and HPV- (right) TCGA HNSCC cohorts. Numbers indicated in the boxes are the calculated Spearman’s rank correlation coefficient of the indicated gene pairs. Statistical p value significance levels are indicated as follows: * p ≤ 0.05; ** p ≤ 0.01; *** p ≤ 0.001; **** p ≤ 0.0001; ns – not significant
Fig. 3
Fig. 3
T-cell infiltration is higher in HPV+ HNSCC compared to HPV- and normal control counterparts. A previously reported 13 gene T-cell transcript signature was calculated for HPV+, HPV-, and matched normal-adjacent control tissues. Numbers in brackets refer to the number of samples included in each analysis. Statistical p value significance levels are indicated as follows: * p ≤ 0.05; ** p ≤ 0.01; *** p ≤ 0.001; **** p ≤ 0.0001; ns—not significant
Fig. 4
Fig. 4
T-cell infiltration is not correlated with NSD1 expression in HPV+ HNSCC, but is weakly correlated in HPV- HNSCC. A previously reported 13 gene T-cell transcript signature was calculated for each sample in the TCGA HNSCC cohort and compared pairwise with normalized RNA-seq data for NSD1, NSD2, and NSD3 for HPV+ (a) and HPV- (b) HNSCC samples. For each NSD paralog, the correlation with the T-cell transcript signature was calculated by Spearman’s Rho analysis
Fig. 5
Fig. 5
Low NSD1, NSD2, or NSD3 expression is strongly associated with reduced survival in patients with HPV+ but not HPV- HNSCC. Overall survival of patients grouped by high, mid, or low expression of NSD1, NSD2, or NSD3 in the HPV+ (a) and HPV- (b) HNSCC cohorts. Comparison between groups were calculated with the 2-sided log-rank test (p value) and multiple comparisons corrected with the Benjamini–Hochberg method utilizing an FDR threshold of 10% (q value). Numbers in brackets indicate the number of samples included in each expression group

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