Supplementary Table 1 | Immunotherapies with FDA-approval for cancer treatment Agent Class Indication FDA Ipilimumab Anti-CTLA-4-blocking mAb Metastatic melanoma Reference ID: 3417,736 Nivolumab Anti-PD-1-blocking mAb Metastatic melanoma, squamous lung cancer Reference ID: 3677,021 (2nd line) Pembrolizumab Anti-PD-1-blocking mAb Metastatic melanoma Reference ID: 3621,876 Sipuleucel Cell-based vaccine Castration resistant metastatic prostate cancer SR-1346.02, 28 SEP (Provenge) High dose IL-2 2009 Cytokine Metastatic melanoma, metastatic renal cell cancer Abbreviations: CTLA-4, cytotoxic T-lymphocyte protein 4; mAb, monoclonal antibody. 1 Reference ID: 3165,255 Supplementary Table 2 | Clinical trials on cell-based immunotherapies (DCs) in HCC Reference Agent Treatment schedule Study design Population Endpoint Relevant findings Chi et al. Autologous 2 IT injections Prospective, 14 patients with Not reported* RR: 2 PR, 7 SD by WHO criteria; (2005)S1 immature DCs 2 days after EBRT single arm, advanced tumours increased AFP-specific immune (8 Gy) separated by dose finding suitable for EBRT responses in 4/10 patients; 21 days increased NK cell activity in 3/10 patients; no relevant toxicity Nakamoto Autologous 1 IA injection Prospective, 10 patients with HCV- Not reported* No difference in RFS compared with et al. immature DCs mixed with single arm related tumours in a historical control group; DC (2007)S2 pulsed with Gelfoam, during TNM stage >II treated migration to regional lymph nodes HepG2-derived selective with TAE not observed; ELISPOT response to tumour lysate embolization AFP, hTERT, Her-2/neu and MRP3 increased by 2–20-fold in 6/8 patients; no relevant toxicity Butterfield Autologous 3 biweekly ID Prospective, 16 HLA-A*0201 Safety and No AFP or tumour responses; et al. immature DCs injections single arm, patients with AFP- immunological substantial but mostly modest (2006)S3 pulsed separately dose finding expressing TNM stage III effects* tetramer responses in 6/10 patients with 4 AFP and IV tumours with concordant ELISPOT responses peptides in 5/6; enhanced NK cell activation; inability to generate acceptable DCs in 2 patients; no AEs attributable to vaccination Tada et al. Autologous 6 SC injection and Prospective, 5 patients with early Safety, feasibility RR: No tumour response; strong (2012)S4 mature DCs topical imiquimod single arm and intermediate and immune T-cell responses against HCC pulsed with three every 2 weeks after tumours with no prior activity* antigens in 5/5 patients tumour- TACE response to TACE (particularly against AFP and associated MAGE-1); no relevant toxicity proteins AFP, MAGEA1, GPC3 Mazzolini Autologous 3 IT injections on Prospective, 17 patients with 2 P: feasibility and RR: 0 PR, 1 SD/8 HCC pts; 1/8 et al. mature DCs metastatic digestive safety* positive DTH with tumour lysate in (2005)S5 transduced with tumours (8 patients S: biological effect HCC patients; substantial increase an adenoviral with advanced HCC) and antitumour in tumour infiltration by effector activity immune cells in 5 patients with weeks 0, 3 and 6 single arm vector encoding human IL-12 HCC; no relevant toxicity (no DLT) Qiu et al. Autologous 2 to 7 IV weekly Prospective, 9 patients with stage III (2011)S6 mature DCs injections (no single arm tumours treated by positive DTH after Tx; prolonged pulsed with prespecified cytoreductive resection survival compared to a historical tumour lysate schedule reported) followed by RFA, control group (median 17.1 versus incubated with chemotherapy or 10.1 months); increased frequency of recombinant interventional Tx IFN-γ-producing T cells; fever and Not defined* bovine α1,3GT, RR: 3 PR; 0 SD; 8/9 patients had rash common but not severe cocultured with BM-derived CIKs El Ansary Autologous Prospective, 30 patients with et al. mature DCs 1 ID injection randomized advanced HCC not reported); increased peripheral CD8+ (2013)S7 pulsed with (BSC) amenable to surgery, T cells; no serious AEs reported HepG2-derived Not defined* RR: 2 PR; 9 SD (criteria not local ablation or TACE tumour lysate Palmer Autologous one to six three- Prospective, 39 patients with P: tumour response, RR: 1 PR, 6 SD/25 evaluable et al. matured DCs weekly IV single arm advanced HCC not toxicity patients; 4 /17 patients had AFP (2009)S8 pulsed with injections amenable to surgery, S: changes in serum responses; no relevant toxicity local ablation or TACE. AFP and immune including hepatic toxicity or response de novo autoantibody formation Not reported* RR: 4 PR, 17 SD/31 patients HepG2-derived tumour lysate Lee et al. Autologous Group 1: 5 weekly Prospective, 31 patients with TNM (2005)S9 mature DCs IV injections; group single arm stage IV tumours pulsed with 2: same plus increased survival in comparison autologous monthly injections with a historical control group; no tumour lysate for 2–12 months relevant toxicity evaluable; 0/10 DTH responses; *The method used for sample size calculation was not reported. Abbreviations: α1,3GT, α1,3-galactosyltransferase; AE, adverse events; AFP, α-fetoprotein; BSC, best supportive care; CIK, cytokine-induced killer cells; DC, dendritic cell; DLT, dose-limiting toxicity; DTH, skin delayed hypersensitivity test; EBRT, 3 external beam radiation therapy; ELISPOT, enzyme-linked immunospot; GPC3, glypican-3; Gy, grey; HCC, hepatocellular carcinoma; Her-2/neu, receptor tyrosine-protein kinase erbB-2; hTERT, telomerase reverse transcriptase; IA, intra-arterial; ID, intradermal; IT, intrathecal; IV, intravenous; MAGEA1, melanoma-associated antigen 1; MRP3, canalicular multispecific organic anion transporter 2; NK, natural killer; P, primary endpoint; PR, partial response; RFA, radiofrequency ablation; RFS, recurrence-free survival; RR, response rate; S, secondary endpoint; SC, subcutaneous; SD, stable disease; TNM, tumour-node-metastasis; TACE, transarterial chemoembolization; TAE, transarterial embolization; Tx, treatment. 4 Supplementary Table 3 | Clinical trials on cell-based immunotherapies (CIKs) in HCC Reference Agent Treatment schedule Study design Population Endpoint Relevant findings Takayama Autologous 6 IV infusions 2 to Prospective, 150 patients P: 3-year RFS and Increased 3-year RFS (37% versus et al. lymphocytes 24 months after randomized undergoing R0 TTR 22%) and TTR (median: 2.8 versus (2000)S10 activated with resection resection (76 received S: disease-specific 1.6 years); no difference in OS; no CIKs) survival and OS relevant toxicity Clinical effect No difference in recurrence rates; rIL-2 Hui et al. Autologous 3 (group 1) or 6 Prospective, 127 patients with (2009)S11 lymphocytes (group 2) IV randomized solitary tumours treated increase in RFS (5-year rate: 23%, activated with infusions every (BSC); sample by R0 resection (84 19% and 11% in groups 1, 2 and rIL-2 and rIL-1a 2 weeks after size received CIKs) control); no difference in OS; 5 resection calculation patients had DLT (persistent fever) not reported Pan et al. Autologous At least 4 IV (2013)S12 lymphocytes injections every solitary resected (5-year OS: 65.9% versus 50.2%); activated with 2 weeks after tumours (no selection multivariate survival analysis rIL-2 and rIL-1a resection criteria for CIK showed AST, tumour size, tumour therapy) compared number, pathological grades and with a historical CIK Tx as independent prognostic Retrospective 204 patients with OS cohort Increased OS in CIK-treated patients factors Weng et al. Autologous 8–10 IV injections Prospective, 45 patients with (2008)S13 lymphocytes given every randomized nodular or massive RFS rate (9% versus 30%); increase activated with 15 days, starting (BSC) HCC (2–13 cm) in in circulating CD3+, CD4+, and rIL-2 6–8 weeks after vascular complete CD3+CD56+ cells and decreased CD8+ locoregional response after TACE T cells; no relevant toxicity therapy and RFA Tx P: TTR and RFS TTR not reported; reduced 1-year Ma et al. Autologous 6 IV infusions Prospective, 7 patients with small P: changes in Increased proportion of CD3+CD8+ (2010)S14 lymphocytes every 2 weeks single arm (1.0–3.5 cm) tumours; peripheral cell T cells (36% versus 48.%); increased activated with within 3 months tumour-naive or subsets and IFN-γ blood levels of IFN-γ (7.6 versus rIL-2, and after RFA relapsing after prior levels; tumour 4.7 pg/ml); no recurrence after therapy recurrence 7 month follow-up RetroNectin® 5 (Takara Bio Inc., Japan) Yu et al. Autologous 2 IV monthly until Prospective, 132 patients with early P: OS Increased OS in CIK-treated patients (2014)S15 lymphocytes recurrence (post- randomized to advanced tumours S: PFS (median 24.9 versus 11.3 months); activated with resection), (BSC) receiving standard Tx no difference in recurrence rate or rIL-2 and rIL-1a progression (post- (66 received CIKs) pattern after resection; no relevant TACE or BSC) or toxicity up to 36 months Shi et al. Autologous 3 IV infusions 10 Prospective, 13 patients with mostly P: Changes in Increased proportion of CD3+CD8+, (2004)S16 lymphocytes to 15 days after single arm advanced HBV-related peripheral CD3+CD56+ and CD25+ cells and activated with apheresis tumours lymphocytes subsets type I and II dendritic cells rIL-2 Abbreviations: AST, aspartate aminotransferase; BSC, best supportive care; CIK, cytokine-induced killer cells; DLT, dose-limiting toxicity; HCC, hepatocellular carcinoma; IV, intravenous; OS, overall survival; P, primary endpoint; PFS, progression free survival; R0, negative-margin resection; RFA, radiofrequency ablation; RFS, recurrence-free survival; S, secondary endpoint; TACE, transarterial chemoembolization; TTR, time to recurrence; Tx, treatment. 6 Supplementary reference list S1. Chi, K. H. et al. Combination of conformal radiotherapy and intratumoral injection of adoptive dendritic cell immunotherapy in refractory hepatoma. J. Immunother. 28, 129–135 (2005). S2. 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