HVCN1-mutated Cases per COO

hvcn1 <- 
  muts %>%
  dplyr::filter(gene == "HVCN1")

patients_hvcn1 <- unique(hvcn1$patient)

coo_hvcn1 <-
  coo %>% 
  dplyr::filter(patient %in% muts$patient, 
                coo_ns %in% c("ABC", "GCB")) %>%
  dplyr::mutate(hvcn1_status = patient %in% patients_hvcn1)

coo_hvcn1 %>%
  dplyr::group_by(coo_ns) %>% 
  dplyr::summarize(hvcn1_mutant = sum(hvcn1_status), 
                   total = length(patient), 
                   prop = round(hvcn1_mutant / total, 3)) %>%
  knitr::kable()
coo_ns hvcn1_mutant total prop
ABC 1 95 0.011
GCB 7 170 0.041

Fisher’s Exact Test

Testing for the association of HVCN1 mutations with COO.

fisher_hvcn1 <- 
  coo_hvcn1 %>% 
  dplyr::mutate(hvcn1_status = patient %in% patients_hvcn1) %$% 
  table(coo_ns, hvcn1_status) %>% 
  fisher.test()
fisher_hvcn1

    Fisher's Exact Test for Count Data

data:  .
p-value = 0.2656
alternative hypothesis: true odds ratio is not equal to 1
95 percent confidence interval:
   0.504025 183.694360
sample estimates:
odds ratio 
  4.020788

Differential Expression of HVCN1

Boxplots

Across all DLBCL samples

texpr_hvcn1_all <-
  texpr["HVCN1", , drop = FALSE] %>% 
  t() %>% 
  as.data.frame() %>% 
  tibble::rownames_to_column("patient") %>%
  dplyr::mutate(hvcn1_status = ifelse(patient %in% patients_hvcn1, "Mutated", "Not Mutated")) %>%
  dplyr::rename(expr = HVCN1)

boxplot_hvcn1_expr_all <-
  texpr_hvcn1_all %>%
  ggplot(aes(x = hvcn1_status, y = expr)) +
  geom_boxplot() +
  geom_jitter(position = position_jitter(width = 0.5, height = 0))
boxplot_hvcn1_expr_all

Across GCB DLBCL samples

texpr_hvcn1_gcb <- 
  texpr_hvcn1_all %>% 
  dplyr::left_join(coo, by = "patient") %>% 
  dplyr::filter(coo_ns == "GCB")

boxplot_hvcn1_expr_gcb <-
  boxplot_hvcn1_expr_all %+% texpr_hvcn1_gcb
boxplot_hvcn1_expr_gcb

Mann-Whitney U test

Using all DLBCL samples

hvcn1_mutants <- texpr_hvcn1_all$patient %in% patients_hvcn1
wilcox.test(texpr_hvcn1_gcb[hvcn1_mutants, "expr"], texpr_hvcn1_gcb[!hvcn1_mutants, "expr"])

    Wilcoxon rank sum test with continuity correction

data:  texpr_hvcn1_gcb[hvcn1_mutants, "expr"] and texpr_hvcn1_gcb[!hvcn1_mutants, "expr"]
W = 575, p-value = 0.01398
alternative hypothesis: true location shift is not equal to 0

Using GCB DLBCL samples

hvcn1_mutants <- texpr_hvcn1_gcb$patient %in% patients_hvcn1
wilcox.test(texpr_hvcn1_gcb[hvcn1_mutants, "expr"], texpr_hvcn1_gcb[!hvcn1_mutants, "expr"])

    Wilcoxon rank sum test with continuity correction

data:  texpr_hvcn1_gcb[hvcn1_mutants, "expr"] and texpr_hvcn1_gcb[!hvcn1_mutants, "expr"]
W = 327, p-value = 0.05465
alternative hypothesis: true location shift is not equal to 0