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Commit aee89bcf authored by Monah Abou Alezz's avatar Monah Abou Alezz
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fix transgene script

parent 31eabd95
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scRNAseq_transgene/seurat_analysis.R
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# ========================================================-
# Title: Seurat analysis of scRNAseq analysis from cells with transgenes
# Description: Code to generate Fig5, SuppFig15
# Title: Seurat analysis of transgene scRNAseq
# Description: Code to generate Fig5
# Author: Monah Abou Alezz
# Date: 2025-03-06
# ========================================================-
......@@ -11,362 +11,118 @@ suppressPackageStartupMessages(library(ggrepel))
suppressPackageStartupMessages(library(clusterProfiler))
suppressPackageStartupMessages(library(RColorBrewer))
## load seurat data
h48_final <- readRDS("data/organoids_h48_final.rds")
d5_final <- readRDS("data/organoids_D5_final.rds")
Idents(h48_final) <- "RNA_snn_h.orig.ident_res.0.6"
Idents(d5_final) <- "RNA_snn_h.orig.ident_res.0.6"
h48_final@meta.data[['orig.ident']] <- recode_factor(
h48_final@meta.data[["orig.ident"]],
"Sample1" = "AAV2",
"Sample3" = "AAV9",
"Sample5" = "Spk",
"Sample7" = "UT")
h48_final@meta.data[["RNA_snn_h.orig.ident_res.0.6"]] <- recode_factor(
h48_final@meta.data[["RNA_snn_h.orig.ident_res.0.6"]],
"0" = "Astrocytes",
"1" = "Immature.Astrocytes",
"2" = "Undifferentiated",
"3" = "Neurons",
"4" = "Immature.Neurons",
"5" = "OPC",
"6" = "Astrocytes",
"7" = "Oligodendrocytes",
"8" = "Undifferentiated",
"9" = "Astrocytes",
"10" = "Undifferentiated",
"11" = "Undifferentiated")
h48_final$RNA_snn_h.orig.ident_res.0.6 <- factor(
h48_final$RNA_snn_h.orig.ident_res.0.6,
levels = c("Astrocytes",
"Neurons",
"Oligodendrocytes",
"Immature.Astrocytes",
"Immature.Neurons",
"OPC",
"Undifferentiated"))
d5_final@meta.data[['orig.ident']] <- recode_factor(
d5_final@meta.data[["orig.ident"]],
"Sample2" = "AAV2",
"Sample4" = "AAV9",
"Sample6" = "Spk",
"Sample8" = "UT")
d5_final@meta.data[["RNA_snn_h.orig.ident_res.0.6"]] <- recode_factor(
d5_final@meta.data[["RNA_snn_h.orig.ident_res.0.6"]],
"0" = "Astrocytes",
"1" = "Immature.Neurons",
"2" = "Undifferentiated",
"3" = "Neurons",
"4" = "Oligodendrocytes",
"5" = "Undifferentiated",
"6" = "Undifferentiated",
"7" = "Immature.Astrocytes",
"8" = "OPC",
"9" = "Immature.Neurons",
"10" = "Astrocytes",
"11" = "Undifferentiated",
"12" = "Astrocytes",
"13" = "Neurons")
d5_final$RNA_snn_h.orig.ident_res.0.6 <- factor(
d5_final$RNA_snn_h.orig.ident_res.0.6,
levels = c("Astrocytes",
"Neurons",
"Oligodendrocytes",
"Immature.Astrocytes",
"Immature.Neurons",
"OPC",
"Undifferentiated"))
ggplotColours <- function(n = 6, h = c(0, 360) + 15){
if ((diff(h) %% 360) < 1) h[2] <- h[2] - 360/n
hcl(h = (seq(h[1], h[2], length = n)), c = 100, l = 65)
}
## umap
DimPlot(object = h48_final,
reduction = "umap.harmony.orig.ident",
group.by = "RNA_snn_h.orig.ident_res.0.6",
label = T,
repel = T,
pt.size = 0.2,
label.size = 6) +
scale_color_manual(labels=c("Astrocytes",
"Neurons",
"Oligodendrocytes",
"Immature Astrocytes",
"Immature Neurons",
"OPC",
"Undifferentiated"),
values = ggplotColours(n = 7))
## donut plot
ggplot_object_clusters_labels <- melt(table(h48_final$RNA_snn_h.orig.ident_res.0.6))
colnames(ggplot_object_clusters_labels) <- c("Cell_type", "Count")
totalB <- ggplot_object_clusters_labels %>% mutate(percentage = Count/sum(Count))
totalB$percentage <- totalB$percentage*100
totalB$fraction = totalB$Count / sum(totalB$Count)
totalB$ymax <- cumsum(totalB$fraction)
totalB$ymin <- c(0, head(totalB$ymax, n=-1))
totalB$labelPosition <- (totalB$ymax + totalB$ymin) / 2
totalB$Samples <- c("Astrocytes", "Neurons", "Oligodendrocytes",
"Immature\nAstrocytes", "Immature\nNeurons",
"OPC", "Undifferentiated")
totalB$label <- paste0(totalB$Cell_type, ":","\n",round(totalB$percentage, 2), "%")
totalB$label2 <- c(paste0(totalB$Samples[1], ":","\n",round(totalB$percentage[1], 2), "%"),
paste0(totalB$Samples[2], ":","\n",round(totalB$percentage[2], 2), "%"),
paste0(totalB$Samples[3], ":","\n",round(totalB$percentage[3], 2), "%"),
paste0(totalB$Samples[4], ": ",round(totalB$percentage[4], 2), "%"),
paste0(totalB$Samples[5], ": ",round(totalB$percentage[5], 2), "%"),
paste0(totalB$Samples[6], ":","\n",round(totalB$percentage[6], 2), "%"),
paste0(totalB$Samples[7], ":","\n",round(totalB$percentage[7], 2), "%"))
ggplot(totalB, aes(ymax=ymax, ymin=ymin, xmax=4, xmin=3, fill=Cell_type)) +
geom_rect() +
geom_label_repel(x=3.5, aes(y=labelPosition, label=label), size=10) +
coord_polar(theta="y") +
xlim(c(2, 4)) +
theme_void() +
theme(legend.position = "none")
## barplot
PrctCellExpringGene <- function(object, genes, group.by = "all"){
if(group.by == "all"){
prct = unlist(lapply(genes,calc_helper, object=object))
result = data.frame(Markers = genes, Cell_proportion = prct)
return(result)
full_final <- readRDS("data/full_transgenes.rds")
Idents(full_final) <- "Cell_Type"
FeaturePlot(full_final,
features = c("GAA-new","GFP","LUC"),
split.by = "orig.ident")
# Define transgene metadata
cell_types <- c("Neurons", "Immature.Neurons", "Astrocytes", "Immature.Astrocytes", "Oligodendrocytes", "OPC")
ut <- subset(full_final, orig.ident == "UT")
transgene_info <- list(
gfp = list(gene = "GFP", orig.ident = c("AAV9_CAG_GFP", "Spk_CAG_GFP", "Spk_hAAT_GFP")),
gaa = list(gene = "GAA-new", orig.ident = "AAV9_CAG_GAA"),
luc = list(gene = "LUC", orig.ident = "Spk_CAG_LUC")
)
deg_results <- list()
for (trans in names(transgene_info)) {
gene <- transgene_info[[trans]]$gene
samples <- transgene_info[[trans]]$orig.ident
obj <- subset(full_final, orig.ident %in% samples)
merged <- merge(ut, obj)
# Subset by lineage
neurons <- subset(merged, Cell_Type %in% c("Neurons", "Immature.Neurons"))
astrocytes <- subset(merged, Cell_Type %in% c("Astrocytes", "Immature.Astrocytes"))
oligo <- subset(merged, Cell_Type %in% c("Oligodendrocytes", "OPC"))
# DEG for each lineage
for (lineage in c("neurons", "astrocytes", "oligo")) {
lineage_obj <- get(paste0(lineage))
for (samp in samples) {
cat("Extracting DEGs in", lineage, "of", samp, "vs UT\n")
degs <- FindMarkers(lineage_obj,
ident.1 = samp,
ident.2 = "UT",
group.by = "orig.ident",
only.pos = FALSE,
min.pct = 0,
test.use = "wilcox",
logfc.threshold = 0,
min.cells.group = 0)
deg_results[[paste(trans, lineage, samp, "total", sep = "_")]] <- degs
}
}
else{
list = SplitObject(object, group.by)
factors = names(list)
results = lapply(list, PrctCellExpringGene, genes=genes)
for(i in 1:length(factors)){
results[[i]]$Feature = factors[i]
# Select cells that express the transgene AND belong to selected cell types
expr_cells <- GetAssayData(obj, slot = "counts")[gene, ] > 0
selected_cells <- colnames(obj)[expr_cells & Idents(obj) %in% cell_types]
obj_pos <- subset(obj, cells = selected_cells)
# Merge with UT cells
merged_pos <- merge(ut, obj_pos)
# Subset by lineage
neurons_pos <- subset(merged_pos, Cell_Type %in% c("Neurons", "Immature.Neurons"))
astrocytes_pos <- subset(merged_pos, Cell_Type %in% c("Astrocytes", "Immature.Astrocytes"))
oligo_pos <- subset(merged_pos, Cell_Type %in% c("Oligodendrocytes", "OPC"))
# DEG for each lineage
for (lineage in c("neurons", "astrocytes", "oligo")) {
lineage_obj <- get(paste0(lineage, "_pos"))
for (samp in samples) {
cat("Extracting DEGs in", lineage, "of", samp, "vs UT (transgene-positive cells)\n")
degs <- FindMarkers(lineage_obj,
ident.1 = samp,
ident.2 = "UT",
group.by = "orig.ident",
only.pos = FALSE,
min.pct = 0,
test.use = "wilcox",
logfc.threshold = 0,
min.cells.group = 0)
deg_results[[paste(trans, lineage, samp, "pos", sep = "_")]] <- degs
}
combined = do.call("rbind", results)
return(combined)
}
}
calc_helper <- function(object,genes){
counts = object[['RNA']]@counts
ncells = ncol(counts)
if(genes %in% row.names(counts)){
sum(counts[genes,]>0)/ncells
}else{return(NA)}
}
aav9 <- subset(h48_final, orig.ident=="AAV9")
gfp_percentage_cell_type <- PrctCellExpringGene(aav9,
genes ="GFP",
group.by = "RNA_snn_h.orig.ident_res.0.6")
gfp_percentage_cell_type$Percentage <- gfp_percentage_cell_type$Cell_proportion*100
gfp_percentage_cell_type <- gfp_percentage_cell_type[,c(4,3)]
colnames(gfp_percentage_cell_type) <- c("Percentage", "Cell_Types")
gfp_percentage_cell_type <- gfp_percentage_cell_type[c(7,1,6,4,5,3,2),]
gfp_percentage_cell_type$Cell_Types <- factor(gfp_percentage_cell_type$Cell_Types,
levels = c("Immature.Neurons",
"Neurons",
"Immature.Astrocytes",
"Astrocytes",
"OPC",
"Oligodendrocytes",
"Undifferentiated"))
custom_colors <- c("Immature.Neurons" = "#00B6EB",
"Neurons" = "#C49A00",
"Immature.Astrocytes" = "#00C094",
"Astrocytes" = "#F8766D",
"OPC" = "#A58AFF",
"Oligodendrocytes" = "#53B400",
"Undifferentiated" = "#FB61D7")
ggplot(data=gfp_percentage_cell_type,
aes(x=Cell_Types,
y=Percentage,
fill = Cell_Types)) +
geom_bar(stat="identity",
width = 0.7,
position=position_dodge()) + # width of bars
scale_fill_manual(values = custom_colors) +
ylab("% GFP mRNA positive") +
theme_bw() +
theme(
text = element_text(family = "Arial"),
axis.title.x = element_blank(),
axis.title.y = element_text(size=20*96/72),
axis.text.x = element_text(size=16*96/72, angle = 45, vjust = 0.9, hjust = 0.9),
axis.text.y = element_text(size=18*96/72),
legend.position = "none",
aspect.ratio = 1.1)
h48_aav9_ut <- subset(h48_final, orig.ident == "AAV9" | orig.ident == "UT")
d4_aav9_ut <- subset(d4_final, orig.ident == "AAV9" | orig.ident == "UT")
DimPlot(object = h48_aav9_ut,
reduction = "umap.harmony.orig.ident",
group.by = "RNA_snn_h.orig.ident_res.1.2",
split.by = "orig.ident",
label = F,
repel = T,
pt.size = 0.2,
label.size = 6,
ncol = 2) +
scale_color_manual(labels=c("Astrocytes",
"Neurons",
"Oligodendrocytes",
"Immature Astrocytes",
"Immature Neurons",
"OPC",
"Undifferentiated"),
values = ggplotColours(n = 7))
DimPlot(object = d4_aav9_ut,
reduction = "umap.harmony.orig.ident",
group.by = "RNA_snn_h.orig.ident_res.1.2",
split.by = "orig.ident",
label = F,
repel = T,
pt.size = 0.2,
label.size = 6,
ncol = 2) +
scale_color_manual(labels=c("Astrocytes",
"Neurons",
"Oligodendrocytes",
"Immature Astrocytes",
"Immature Neurons",
"OPC",
"Undifferentiated"),
values = ggplotColours(n = 7))
samples <- c("AAV9", "UT")
tp <- c("h48","d4")
for (t in tp) {
obj_t <- get(paste0(t,"_final"))
for (i in samples) {
obj_i <- subset(obj_t, orig.ident == i)
ggplot_object_clusters_labels <- melt(table(obj_i$RNA_snn_h.orig.ident_res.1.2))
colnames(ggplot_object_clusters_labels) <- c("Cell_type", "Count")
totalB <- ggplot_object_clusters_labels %>% mutate(percentage = Count/sum(Count))
totalB$percentage <- totalB$percentage*100
totalB$fraction = totalB$Count / sum(totalB$Count)
totalB$ymax <- cumsum(totalB$fraction)
totalB$ymin <- c(0, head(totalB$ymax, n=-1))
totalB$labelPosition <- (totalB$ymax + totalB$ymin) / 2
totalB$Samples <- c("Astrocytes", "Neurons", "Oligodendrocytes",
"Immature\nAstrocytes", "Immature\nNeurons",
"OPC", "Undifferentiated")
totalB$label <- paste0(totalB$Cell_type, ":","\n",round(totalB$percentage, 2), "%")
totalB$label2 <- c(paste0(totalB$Samples[1], ":","\n",round(totalB$percentage[1], 2), "%"),
paste0(totalB$Samples[2], ":","\n",round(totalB$percentage[2], 2), "%"),
paste0(totalB$Samples[3], ":","\n",round(totalB$percentage[3], 2), "%"),
paste0(totalB$Samples[4], ": ",round(totalB$percentage[4], 2), "%"),
paste0(totalB$Samples[5], ": ",round(totalB$percentage[5], 2), "%"),
paste0(totalB$Samples[6], ":","\n",round(totalB$percentage[6], 2), "%"),
paste0(totalB$Samples[7], ":","\n",round(totalB$percentage[7], 2), "%"))
donut_i <- ggplot(totalB, aes(ymax=ymax, ymin=ymin, xmax=4, xmin=3, fill=Cell_type)) +
geom_rect() +
geom_label_repel(x=3.5, aes(y=labelPosition, label=label), size=10) +
coord_polar(theta="y") +
xlim(c(2, 4)) +
ggtitle(paste0(i)) +
theme_void() +
theme(legend.position = "none",
plot.title = element_text(hjust = 0.5, size = 50, family = "Arial"),
plot.title.position = "plot")
assign(paste0("donut_",t,"_", i), donut_i)
# Select cells that DO NOT express the transgene AND belong to selected cell types
expr_cells <- GetAssayData(obj, slot = "counts")[gene, ] == 0
selected_cells <- colnames(obj)[expr_cells & Idents(obj) %in% cell_types]
obj_neg <- subset(obj, cells = selected_cells)
# Merge with UT cells
merged_neg <- merge(ut, obj_neg)
# Subset by lineage
neurons_neg <- subset(merged_neg, Cell_Type %in% c("Neurons", "Immature.Neurons"))
astrocytes_neg <- subset(merged_neg, Cell_Type %in% c("Astrocytes", "Immature.Astrocytes"))
oligo_neg <- subset(merged_neg, Cell_Type %in% c("Oligodendrocytes", "OPC"))
# DEG for each lineage
for (lineage in c("neurons", "astrocytes", "oligo")) {
lineage_obj <- get(paste0(lineage, "_neg"))
for (samp in samples) {
cat("Extracting DEGs in", lineage, "of", samp, "vs UT (transgene-negative cells)\n")
degs <- FindMarkers(lineage_obj,
ident.1 = samp,
ident.2 = "UT",
group.by = "orig.ident",
only.pos = FALSE,
min.pct = 0,
test.use = "wilcox",
logfc.threshold = 0,
min.cells.group = 0)
deg_results[[paste(trans, lineage, samp, "neg", sep = "_")]] <- degs
}
}
}
donut_h48_final <- (donut_h48_AAV9 | donut_h48_UT)
donut_d4_final <- (donut_d4_AAV9 | donut_d4_UT)
## markers
for (t in tp) {
obj_t <- get(paste0(t,"_final"))
neurons <- subset(
obj_t,
RNA_snn_h.orig.ident_res.1.2=="Neurons" | RNA_snn_h.orig.ident_res.1.2=="Immature.Neurons")
astro <- subset(
obj_t,
RNA_snn_h.orig.ident_res.1.2=="Astrocytes" | RNA_snn_h.orig.ident_res.1.2=="Immature.Astrocytes")
oligo <- subset(
obj_t,
RNA_snn_h.orig.ident_res.1.2=="Oligodendrocytes" | RNA_snn_h.orig.ident_res.1.2=="OPC")
assign(paste0("neurons_",t,"_obj_x_markers"), neurons)
assign(paste0("astro_",t,"_obj_x_markers"), astro)
assign(paste0("oligo_",t,"_obj_x_markers"), oligo)
}
for (k in ls()[grep("_obj_x_markers", ls())]) {
cells <- get(k)
degs <- FindMarkers(object = cells,
ident.1 = "AAV9",
ident.2 = "UT",
group.by = "orig.ident",
only.pos = FALSE,
min.pct = 0,
test.use = "wilcox",
logfc.threshold = 0,
min.cells.group = 0)
assign(paste0(k,"_aav9_vs_ut_degs"), degs)
}
## gsea
## GSEA
h_gmt <- read.gmt("data/h.all.v7.2.symbols.gmt")
for (i in ls()[grep("aav9_vs_ut_degs", ls())]) {
gene_res <- get(i)
gsea_results <- list()
for (deg_name in names(deg_results)) {
gene_res <- deg_results[[deg_name]]
if (!"avg_log2FC" %in% colnames(gene_res)) next
logfc_symbol <- as.vector(gene_res$avg_log2FC)
names(logfc_symbol) <- row.names(gene_res)
names(logfc_symbol) <- rownames(gene_res)
logfc_symbol <- sort(logfc_symbol, decreasing = TRUE)
contr.gsea <- GSEA(logfc_symbol,
TERM2GENE = h_gmt,
nPerm = 10000,
pvalueCutoff = 1)
contr.gsea.symb <- as.data.frame(contr.gsea)
assign(paste0("GSEA_",i), contr.gsea.symb)
}
## GSEA heatmaps
type <- c("astro", "neurons", "oligo")
for (p in type) {
hallmark.full <- data.frame()
for (ds in ls()[grep(paste0("GSEA_", p), ls())]) {
ds.t <- get(ds)
ds.t.filt <- ds.t[,c("ID", "setSize", "enrichmentScore", "NES", "pvalue", "p.adjust", "qvalues"), drop = FALSE]
ds.t.filt$Dataset <- ds
if (nrow(hallmark.full) == 0) {
hallmark.full <- ds.t.filt
} else {
hallmark.full <- rbind(hallmark.full, ds.t.filt)
}
contr.gsea <- tryCatch({
GSEA(logfc_symbol,
TERM2GENE = h_gmt,
nPerm = 10000,
pvalueCutoff = 1)
}, error = function(e) NULL)
if (!is.null(contr.gsea)) {
gsea_results[[paste0("GSEA_", deg_name)]] <- as.data.frame(contr.gsea)
}
hallmark.full.filt <- hallmark.full[, c("ID", "NES", "Dataset", "qvalues")]
hallmark.full.filt$ID <- gsub(x = hallmark.full.filt$ID, "HALLMARK_", "")
hallmark.full.filt$sig <- ifelse(
hallmark.full.filt$qvalues <= 0.05 & hallmark.full.filt$qvalues > 0.01, '*',
ifelse(hallmark.full.filt$qvalues <= 0.01 & hallmark.full.filt$qvalues > 0.001, '**',
ifelse(hallmark.full.filt$qvalues <= 0.001 & hallmark.full.filt$qvalues > 0.0001, '***',
ifelse(hallmark.full.filt$qvalues <= 0.0001, '****', ''))))
hallmark.order <- hallmark.full.filt %>%
group_by(ID) %>%
summarise(Pos = sum(NES))
hallmark.order.terms <- hallmark.order[order(hallmark.order$Pos, decreasing = FALSE), "ID", drop = FALSE]
hallmark.full.filt.tt <- reshape2::melt(reshape2::dcast(hallmark.full.filt,
ID ~ Dataset,
value.var="NES"), id.vars = c("ID"))
colnames(hallmark.full.filt.tt) <- c("ID", "Dataset", "NES")
hallmark.full.filt.tt$ID <- factor(hallmark.full.filt.tt$ID, levels = hallmark.order.terms$ID)
hallmark.full.filt.tt <- merge(hallmark.full.filt.tt,
hallmark.full.filt[, c("ID", "Dataset", "sig")],
by = c("ID", "Dataset"),
all.x = TRUE)
labels <- c("Day4", "Day2")
p.hallmark <- ggplot(hallmark.full.filt.tt,
aes(x = Dataset, y = ID)) +
geom_tile(aes(fill = NES), colour = "white") +
geom_text(aes(label = paste(sig)), size=4*96/72, fontface = "bold") +
scale_fill_gradientn(colours = colorRampPalette(rev(brewer.pal(11,"RdBu")))(100),
limits = c(-3.5, 3.5),
na.value = "white") +
ylab("") +
xlab("") +
coord_fixed(ratio = 0.6) +
scale_x_discrete(labels = labels) +
theme_bw(base_size = 12) +
theme(axis.text.x = element_text(angle = 45, hjust = 1, face = "bold", size = 18*96/72),
axis.text.y = element_text(face = "bold", size = 12*96/72),
legend.text = element_text(face = "bold", size = 14*96/72),
legend.title = element_text(face = "bold", size = 12*96/72))
assign(paste0("p.hallmark_", p), p.hallmark)
}
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