In patients with HBeAg-positive chronic hepatitis B, peginterferon alfa-2a offers superior efficacy over lamivudine, on the basis of HBeAg seroconversion, HBV DNA suppression, and HBsAg seroconversion.

Current therapies for chronic hepatitis B (CHB) have a number of limitations, and better treatment options are needed. Peginterferon alpha-2a (40 kDa) is superior to conventional interferon alpha-2a in the treatment of chronic hepatitis C. This is the first report on peginterferon alpha-2a (40 kDa) in the treatment of CHB. In this phase II study, 194 patients with CHB not previously treated with conventional interferon-alpha were randomized to receive weekly subcutaneous doses of peginterferon alpha-2a (40 kDa) 90, 180 or 270 microg, or conventional interferon alpha-2a 4.5 MIU three times weekly. Twenty-four weeks of therapy were followed by 24 weeks of treatment-free follow-up. All subjects were assessed for loss of hepatitis B e antigen (HBeAg), presence of hepatitis B antibody (anti-HBe), suppression of hepatitis B virus (HBV) DNA, and normalization of serum alanine transaminase (ALT) after follow-up. At the end of follow-up, HBeAg was cleared in 37, 35 and 29% of patients receiving peginterferon alpha-2a (40 kDa) 90, 180 and 270 microg, respectively, compared with 25% of patients on conventional interferon alpha-2a. The combined response (HBeAg loss, HBV DNA suppression, and ALT normalization) of all peginterferon alpha-2a (40 kDa) doses combined was twice that achieved with conventional interferon alpha-2a (24%vs 12%; P = 0.036). All treatment groups were similar with respect to frequency and severity of adverse events. These results indicate that peginterferon alpha-2a (40 kDa) is superior in efficacy to conventional interferon alpha-2a in chronic hepatitis B based on clearance of HBeAg, suppression of HBV DNA, and normalization of ALT.

Hypoxia, the most commonly observed characteristic in cancers, is implicated in the establishment of an immunosuppressive niche. Recent studies have indicated that extracellular vesicle (EV)-mediated cancer-stroma interactions are considered to play a critical role in the regulation of various cellular biological functions, with phenotypic consequences in recipient cells. However, the mechanisms underlying the relationship between EVs and hypoxia during cancer progression remain largely unknown. In this study, we found that EVs derived from hypoxic lung cancers increased M2-type polarization by miR-103a transfer. Decreased PTEN levels caused by hypoxic cancer-cell-derived EV miR-103a increased activation of AKT and STAT3 as well as expression of several immunosuppressive and pro-angiogeneic factors. In contrast, inhibition of miR-103a by an miRNA inhibitor effectively decreased hypoxic cancer-mediated M2-type polarization, improving the cytokine prolife of tumor infiltration macrophages. Macrophages received cancer-cell-derived EV miR-103a feedback to further enhance cancer progression and tumor angiogenesis. Finally, circulating EV miR-103a levels were higher in patients with lung cancer and closely associated with the M2 polarization. In conclusion, our results delineate a novel mechanism by which lung cancer cells induce immunosuppressive and pro-tumoral macrophages through EVs and inspire further research into the clinical application of EV inhibition or PTEN restoration for immunotherapy.

N ASH affects more 80 million people worldwide and represents one of our most urgent and neglected global health crises, with broad implications on public health. 1,2 It is associated with increased risks of cirrhosis, hepatic decompensation, hepatocellular carcinoma, liver transplantation, and death. The prevalence of NASH and NASH-related end-stage liver disease are predicted to increase significantly over the next decade. 3 There are currently no approved therapies for NASH.NASH is characterized histologically by hepatocellular injury, inflammation, steatosis, and may be accompanied by fibrosis, an important predictor of disease progression and mortality. [4][5][6][7] At present, the US Food and Drug Administration and European Medicines Agency support the use of the histologic end points of fibrosis improvement and NASH resolution for accelerated or conditional approval. 8,9 The pathogenesis of NASH is incompletely understood, although several hypotheses have been proposed. 10 Developing therapeutics for NASH poses a vexing challenge for clinicians and researchers, as none of the agents tested to date has been able to demonstrate concurrent histologic improvement in both fibrosis and NASH resolution. [11][12][13][14][15][16] Aldafermin (also known as NGM282 or M70) is an engineered, non-tumorigenic analog of the human gut hormone, fibroblast growth factor 19 (FGF19). [17][18][19] FGF19 plays a central role in regulating bile acid, carbohydrate, and energy metabolism. 20,21 Physiologically, FGF19 is secreted from the ileum in response to farnesoid X receptor activation, leading to the postulation that the effect of farnesoid X receptor agonists may be largely dependent on the induction of its target gene, FGF19. Aldafermin acts on 2 receptor complexes, FGFR1c-KLB and FGFR4-KLB. Activation of the FGFR1c-KLB receptor leads to reduction in liver steatosis and improvement in insulin sensitivity in patients. 22,23 Activation of the FGFR4-KLB receptor potently suppresses the expression of CYP7A1, which encodes the first and ratelimiting enzyme in the de novo synthesis of bile acids. 17,24 Emerging evidence reveals bile acids as an important risk factor for chronic liver diseases including NASH 25 ; accumulation of bile acids induces hepatic stellate cell activation, mitochondrial dysfunction and endoplasmic reticulum stress, leading to cell death, inflammation and liver injury. 26,27 Given aldafermin's mechanism of action, reducing bile acid burden may contribute to additional antiinflammatory and anti-fibrotic benefits beyond those associated with liver fat reduction.We have previously shown that a 12-week treatment with aldafermin produced reductions in liver fat content (LFC) and liver enzymes, and in an open-label study, improvements in liver histology. 28,29 In the current study, we investigated the efficacy and safety of longer treatment with aldafermin 1 mg compared with placebo in patients with biopsy-proven NASH and stage 2 or stage 3 liver fibrosis.

Recent advances in cancer therapy encounter a bottleneck. Relapsing/recurrent disease almost always developed eventually with resistance to the initially effective drugs. Tumor microenvironment has been gradually recognized as a key contributor for cancer progression, epithelial-mesenchymal transition of the cancer cells, angiogenesis, cancer metastasis, and development of drug resistance, while dysregulated immune responses and interactions between various components in the microenvironment all play important roles. Future development of anticancer treatment should take tumor microenvironment into consideration. Besides, we also discuss the limitations of current pre-clinical testing models that mainly come from the impossibility in simulating all detailed carcinogenic mechanisms in human, especially failure to create the same tumor microenvironment. With the cumulating knowledge about tumor microenvironment, the design of a novel anticancer therapy may be facilitated and may have better chance for success in cancer eradication.

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Crosstalk of a tumor with its microenvironment is a critical factor contributing to cancer development. This study investigates the soluble factors released by tumor-associated dendritic cells (TADCs) responsible for increasing cancer stem cell (CSC) properties, cell mobility, and epithelial-to-mesenchymal transition (EMT). Dendritic cells (DCs) of colon cancer patients were collected for phenotype and CXCL1 expression by flow cytometry and Luminex assays. The transcriptome of CXCL1-treated cancer cells was established by next generation sequencing. Inflammatory chemokine CXCL1, present in large amounts in DCs isolated from colon cancer patients, and SW620-conditioned TADCs, enhance CSC characteristics in cancer, supported by enhanced anchorage-independent growth, CD133 expression and aldehyde dehydrogenase activity. Additionally, CXCL1 increases the metastatic ability of a cancer by enhancing cell migration, matrix metalloproteinase-7 expression and EMT. The enhanced CXCL1 expression in DCs is also noted in mice transplanted with colon cancer cells. Transcriptome analysis of CXCL1-treated SW620 cells indicates that CXCL1 increases potential oncogene expression in colon cancer, including PTHLH, TYRP1, FOXO1, TCF4 and ZNF880. Concurrently, CXCL1 displays a specific microRNA (miR) upregulated by the prototypical colon cancer onco-miR miR-105. Analysis of publicly available data reveals CXCL1-driven oncogenes and miR-105 have a negative prognostic impact on the outcome of colon cancer. This study indicates a new mechanism by which the colon cancer milieu exploits DC plasticity to support cancer progression.