Correction and removal of expression of concern: Natural steroid-based cationic copolymers cholesterol/diosgenin--PDMAEMAs and their pDNA nanoplexes: impact of steroid structures and hydrophobic/hydrophilic ratios on pDNA delivery.

[This corrects the article DOI: 10.1039/D1RA00223F.].

Natural steroid-based cationic copolymers cholesterol/diosgenin--PDMAEMAs and their pDNA nanoplexes: impact of steroid structures and hydrophobic/hydrophilic ratios on pDNA delivery.

Using natural-based lipids to construct biocompatible, controllable and efficient nanocarriers and elucidating their structure-function relationships, was regarded as an important area for creating sustainable biomaterials. Herein, we utilized two natural steroids: cholesterol and diosgenin (bearing different hydrophobic tails) as the building blocks, to synthesize a series of natural steroid-based cationic random copolymers PMA6Chol--PDMAEMA and PMA6Dios--PDMAEMA RAFT polymerization. The results demonstrated that the steroid--PDMAEMA copolymers could efficiently bind pDNA (N/P < 3.

DeepReac+: deep active learning for quantitative modeling of organic chemical reactions.

Various computational methods have been developed for quantitative modeling of organic chemical reactions; however, the lack of universality as well as the requirement of large amounts of experimental data limit their broad applications. Here, we present DeepReac+, an efficient and universal computational framework for prediction of chemical reaction outcomes and identification of optimal reaction conditions based on deep active learning. Under this framework, DeepReac is designed as a graph-neural-network-based model, which directly takes 2D molecular structures as inputs and automatically adapts to different prediction tasks.

Trajectory and Functional Analysis of PD-1 CD4CD8 T Cells in Hepatocellular Carcinoma by Single-Cell Cytometry and Transcriptome Sequencing.

The spatial heterogeneity of immune microenvironment in hepatocellular carcinoma (HCC) remains elusive. Here, a single-cell study involving 17 432 600 immune cells of 39 matched HCC (T), nontumor (N), and leading-edge (L) specimens by mass cytometry is conducted. The tumor-associated CD4/CD8 double-positive T (DPT) cells are found enriched in L regions with synergetic expression of PD-1/HLA-DR/ICOS/CD45RO and exhibit a higher level of IFN-, TNF-, and PD-1 upon stimulation.

Synthesis of crosslinkable diblock terpolymers PDPA--P(NMS--OEG) and preparation of shell-crosslinked pH/redox-dual responsive micelles as smart nanomaterials.

Crosslinked polymer nanomaterials have attracted great attention due to their stability and highly controllable drug delivery; herein, a series of well-defined amphiphilic PDPA--P(NMS--OEG) diblock terpolymers (P1-P3) were designed and prepared RAFT polymerization and were self-assembled into non-cross-linked (NCL) nanomicelles, which were further prepared into shell-cross-linked (SCL) micelles cystamine-based shell cross-linking. Using P3 as an optimized polymer, SCL-P3 micelles were prepared, which demonstrated remarkable pH/redox-dual responsive behaviour. For drug delivery, camptothecin (CPT)-loaded SCL-P3 micelles were prepared and showed much higher CPT-loading capability than their NCL-P3 counterparts.