中文摘要：

盡管巨噬細胞有助于癌細胞播散、免疫逃避和轉移生長，但據報道它們也可以協調腫瘤特異性免疫反應。因此，我們假設可以通過治療來調節巨噬細胞極化以防止轉移。在這里，我們表明巨噬細胞通過抑制肝轉移對β-葡聚糖（odetiglucan）治療做出反應。β-葡聚糖激活肝臟駐留巨噬細胞（庫普弗細胞），抑制癌細胞增殖，并在胰腺癌小鼠模型中調用針對肝轉移的生產性 T 細胞介導的反應。盡管被排除在轉移性病變之外，但庫普弗細胞對于β葡聚糖的抗轉移活性至關重要，而葡聚糖也需要 T 細胞。此外，β-葡聚糖驅動小鼠和人類肝轉移瘤中的 T 細胞活化和巨噬細胞復極化，并使轉移病灶對抗 PD1 治療敏感。這些發現證明了巨噬細胞功能在轉移中的重要性，并確定了庫普弗細胞作為胰腺癌轉移到肝臟的潛在治療靶點。

英文摘要：

Although macrophages contribute to cancer cell dissemination, immune evasion, and metastatic outgrowth, they have also been reported to coordinate tumor-specific immune responses. We therefore hypothesized that macrophage polarization could be modulated therapeutically to prevent metastasis. Here, we show that macrophages respond to β-glucan (odetiglucan) treatment by inhibiting liver metastasis. β-glucan activated liver-resident macrophages (Kupffer cells), suppressed cancer cell proliferation, and invoked productive T cell-mediated responses against liver metastasis in pancreatic cancer mouse models. Although excluded from metastatic lesions, Kupffer cells were critical for the anti-metastatic activity of β-glucan, which also required T cells. Furthermore, β-glucan drove T cell activation and macrophage re-polarization in liver metastases in mice and humans and sensitized metastatic lesions to anti-PD1 therapy. These findings demonstrate the significance of macrophage function in metastasis and identify Kupffer cells as a potential therapeutic target against pancreatic cancer metastasis to the liver.

論文信息：

論文題目：Kupffer cells prevent pancreatic ductal adenocarcinoma metastasis to the liver in mice

期刊名稱：Nature Communications

時間期卷：14, Article number: 6330 (2023)

在線時間：2023年10月10日

DOI：doi.org/10.1038/s41467-023-41771-z

產品信息：

貨號：C-010

規格：10ml

品牌：Liposoma

產地：荷蘭

名稱：Clodronate Liposomes

辦事處：Target Technology(靶點科技)

Clodronate Liposomes氯膦酸鹽脂質體清除肝臟巨噬細胞，疾病模型為：門靜脈注射PDACYFP-cells。PDAC是胰腺導管腺癌（Pancreatic Ductal Adenocarcinoma）的縮寫，屬于胰腺癌中常見且惡性程度高的類型，占胰腺惡性腫瘤的85%-90%。它起源于胰腺導管上皮細胞，侵襲性強、進展迅速，多數患者確診時已處于中晚期，5年生存率不足10%。荷蘭Liposoma巨噬細胞清除劑Clodronate Liposomes見刊于Nature Communications：Kupffer 細胞可防止小鼠胰腺導管腺癌轉移到肝臟。

Liposoma巨噬細胞清除劑Clodronate Liposomes氯膦酸二鈉脂質體的材料和方法：

Cell depletion

Antibodies administered to mice included anti-CD4 (GK1.5, 0.2?mg), anti-CD8 (2.43, 0.2?mg), anti-PD1 (RMP1-14, 0.2?mg), and rat isotype control (LTF-2, 0.2?mg) antibodies and were suspended in 200?μl sterile PBS for administration. The abdomen of mice was sterilized, and antibodies were injected into the peritoneum via a 30-gauge needle. All in vivo antibodies were sourced from BioXCell. To deplete liver macrophages, clodronate-encapsulated liposomes (CEL, Liposoma, 200uL) were administered by intraperitoneal (IP) injection according to the manufacturer’s protocol. To deplete Kupffer cells, diphtheria toxin (DT, 200?ng) was delivered IP to Clec4fDTR mice. β-glucan (BG, odetiglucan, Hibercell, 1.2?mg) is a clinical grade soluble, β?1,3/1,6 glucan derived from Saccharomyces cerevisiae. BG was suspended in 100μL PBS and administered IV to mice weekly, unless otherwise noted. For overall survival studies, mice received up to seven doses of BG. Detailed information on antibodies and reagents used in experiments can be in found in Supplementary Table S1.

材料和方法文獻截圖：