SCARB2 & CD36 Drug Discovery Landscape & Assay Solutions
Market Intelligence, Clinical Progress, and High-Purity Reagents for Scavenger Receptor Class B Development.
Clarification on Target Identities: While both belong to the Scavenger Receptor Class B family, SCARB2 (LIMP-2 / CD36L2) and CD36 (FAT / SCARB3) are distinct proteins with different physiological roles, disease associations, and therapeutic profiles. SCARB2 acts primarily as a lysosomal receptor and viral entry cofactor, whereas CD36 functions as a multi-ligand membrane receptor regulating lipid uptake and tumor metastasis. They must not be treated as synonyms in drug discovery pipelines.
TarMart Solution Ecosystem & Related Targets
"Comprehensive reagent toolkit for SCARB2 and CD36 drug discovery. Select your modality below:"
| Component / Network | Product Description | Product Link |
|---|---|---|
| SCARB2 Antigen | SCARB2 ECD-Fc Fusion Protein High purity (>95%), Endotoxin <1EU/ug. Sequence Verified. HEK293 expressed. |
View SCARB2 Products |
| CD36 Antigen | CD36 Recombinant Protein (ECD) High purity (>95%), Native Glycosylation. Sequence Verified. HEK293 expressed. |
View CD36 Products |
| Gene Delivery (SCARB2) | SCARB2 Promise-ORF / Lentivirus Full-length ORF for stable cell lines and viral entry assays. |
View SCARB2 Products |
| Gene Delivery (CD36) | CD36 Promise-ORF / Lentivirus Full-length ORF for lipid uptake and flow cytometry assays. |
View CD36 Products |
| Benchmark Ab (CD36) | Anti-CD36 Recombinant Antibody (Sequence of clinical benchmark) Recombinant positive control for blocking assays. |
View CD36 Products |
| Validator (SCARB2) | SCARB2 siRNA Set For knockdown verification in functional assays. |
View SCARB2 Products |
| Validator (CD36) | CD36 siRNA Set For knockdown verification in functional assays. |
View CD36 Products |
| Related Target A | GBA (Glucocerebrosidase) Lysosomal enzyme interacting with SCARB2; critical for Gaucher and Parkinson's disease pipelines. |
View GBA Products |
| Related Target B | THBS1 (Thrombospondin-1) Endogenous ligand of CD36 involved in angiogenesis and tumor microenvironment signaling. |
View THBS1 Products |
| Related Target C | SCARB1 (SR-BI) Class B Scavenger Receptor member used for selectivity and counter-screening panels. |
View SCARB1 Products |
| Critical Assay Challenge | The TarMart Advantage (Technical Spec) |
|---|---|
| EV71 viral entry inhibition (SCARB2) | HEK293-expressed SCARB2 ECD-Fc preserves native glycosylation required for viral capsid binding. |
| Lipid uptake / Flow Cytometry (CD36) | Lentivirus Premade Particles enable stable cell line construction, maintaining correct multi-pass membrane conformation. |
| pH-dependent binding assays (SCARB2-GBA) | Sequence-verified recombinant SCARB2 and GBA proteins optimized for SPR analysis at pH 7.4 and pH 5.0. |
| Cross-family selectivity screening | Homolog panel (SCARB1, SCARB2, CD36) strictly verified by mass spectrometry to eliminate off-target false positives. |
| Lack of Controls | Clinical Benchmark Antibodies (Biosimilars) included to calibrate assay sensitivity. |
| False Positives | Sequence-verified, multi-target pooled siRNA sets included for specificity validation. |
Live SCARB2 & CD36 R&D Tracker
Market data changes daily. Access the latest global pipeline status directly:
- ➤ View Active CD36 Clinical Trials
- ➤ View Active SCARB2 Clinical Trials
- ➤ Latest CD36 Metastasis Research
- ➤ Latest SCARB2 Parkinson's Research
- ➤ Recent CD36 Patent Filings
Global Clinical Landscape & Future Outlook
The therapeutic development pipelines for SCARB2 and CD36 are moving in highly distinct directions. The race for CD36 therapeutics is intensifying in oncology and metabolic disease, with major players shifting focus from traditional systemic metabolic inhibition to targeting CD36-mediated tumor metastasis and immunosuppression in the lipid-rich tumor microenvironment. As first-generation therapies reach the clinic, the next wave of R&D is targeting highly selective monoclonal antibodies that block fatty acid uptake without inducing thrombocytopenia.
Conversely, SCARB2 R&D is centered on infectious diseases and neurodegeneration. In virology, SCARB2 serves as the primary receptor for Enterovirus 71 (EV71), making soluble SCARB2 decoders and neutralizing antibodies primary candidates for hand, foot, and mouth disease therapeutics. In neurology, SCARB2's role as the GBA (beta-glucocerebrosidase) chaperone has positioned it as a key gene-therapy cargo or small-molecule target to restore lysosomal function in GBA-associated Parkinson's disease.
Competitive Modality & Indication Snapshot
| Target | Modality | Representative Players | Key Indications | Critical Assay Need (Why TarMart?) |
|---|---|---|---|---|
| CD36 | Monoclonal Antibody | Ono Pharmaceutical, Mitobridge | Solid Tumors, Metastasis, NASH | Fatty Acid Uptake Inhibition Assay (Requires CD36 Lentivirus for stable cell lines) |
| SCARB2 | Recombinant Protein / Decoy | Academic Institutes, Biotech | EV71 Infection (HFMD) | Viral Neutralization Assay (Requires High-Purity SCARB2 ECD-Fc) |
| SCARB2 | Gene Therapy / Small Mol | Lysosomal therapeutics developers | Parkinson's Disease (GBA-mutant) | pH-dependent SPR Binding Assay (Requires SCARB2 & GBA recombinant proteins) |
| CD36 | Small Molecule | Academic & Clinical Consortiums | Atherosclerosis, Heart Failure | OxLDL Binding & Selectivity Panel (Requires CD36, SCARB1, and SCARB2 proteins) |
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靶点身份厘清 (Target Identity Resolution)
在进入具体的市场和技术分析之前,必须明确:SCARB2 与 CD36 是同属于 B 类清道夫受体(Class B Scavenger Receptors)家族的两个完全不同的基因和蛋白质,二者不具同义性。
- SCARB2(亦称 LIMP-2、LGP85、CD36L2):主要定位于溶酶体膜,是 β-葡萄糖脑苷脂酶(GBA)向溶酶体靶向输送的关键伴侣蛋白,同时也是肠道病毒 71 型(EV71)的细胞受体。
- CD36(亦称 FAT、GP3B、SCARB3):主要定位于细胞质膜,是长链脂肪酸和氧化低密度脂蛋白(oxLDL)的转运体,广泛参与脂质代谢、血栓形成、肿瘤转移及免疫抑制。
因此,两者的药物开发管线、筛选策略及试剂设计必须独立进行,不可混淆。
全球研发格局 (Global R&D Landscape)
CD36 研发格局:聚焦肿瘤转移与免疫代谢
CD36 近年来已成为肿瘤学和代谢性疾病领域备受瞩目的“明星靶点”。
- 主要参与者:小野制药(Ono Pharmaceutical)、Mitobridge(Astellas 旗下)、Genzyme 以及多家前沿学术衍生 biotech。
- 主导药物类型:
- 单克隆抗体(约占 60%):主要通过阻断 CD36 的脂肪酸结合口袋,抑制肿瘤转移起始细胞(Metastasis-Initiating Cells)的脂质摄取,防止肿瘤发生远端转移。
- 小分子抑制剂(约占 40%):靶向 CD36 与 oxLDL 或脂肪酸的结合位点,用于治疗 NASH/NAFLD、动脉粥样硬化及心肌纤维化。
- 临床痛点:CD36 在血小板上高度表达(即糖蛋白 IV)。早期非选择性抗体易导致血小板聚集或减少症(Thrombocytopenia)。因此,当前研发的绝对核心是筛选不干扰血小板功能、特异性阻断配体结合的非靶向毒性抗体。
SCARB2 研发格局:聚焦神经退行性疾病与抗病毒
SCARB2 的临床价值分布在两个完全不同的极端:
- 帕金森病(PD)与戈谢病(GBA 伴侣功能):
- 主要参与者:专注于溶酶体功能恢复和基因治疗的 Biotech 公司(如 Prevail Therapeutics、Passage Bio)。
- 主导药物类型:AAV 基因治疗(过表达 SCARB2 以促进突变型 GBA 稳定转运至溶酶体)和小分子伴侣调节剂。
- 抗病毒(EV71 手足口病):
- 主要参与者:亚太地区(尤其是中国和东南亚)的疫苗与抗病毒药物研发机构。
- 主导药物类型:重组 SCARB2 诱饵蛋白(Decoy Receptor)或针对 SCARB2 病毒结合域的中和抗体,用以阻断病毒入侵。
前瞻性市场预测 (Future Forecast)
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CD36:从“抗转移”走向“肿瘤免疫联合疗法”
- 预测未来 3-5 年内,CD36 抑制剂将与 PD-(L)1 抑制剂开展大量联合临床试验。最新研究表明,肿瘤微环境(TME)中的 CD36 介导了 T 细胞的脂质过氧化和功能耗竭。阻断 CD36 不仅能抑制肿瘤转移,还能逆转免疫抑制。
- 针对肿瘤转移,开发“特异性阻断脂肪酸结合、保留血小板结合”的差异化抗体将是赢得市场的关键。
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SCARB2:溶酶体靶向递送(LYTAC)的新生力量
- 随着溶酶体靶向嵌合体(LYTAC)技术的发展,SCARB2 作为溶酶体膜蛋白,有望被开发为除 CI-M6PR 之外的新型抗体偶联靶点,用于降解细胞外和膜蛋白。
- 在 GBA 相关帕金森病(GBA-PD)领域,SCARB2/GBA 相互作用的定量高通量筛选(HTS)将成为各大药企建立神经退行性管线的必修课。
分子差异化需求与 Assay 策略 (Molecular Differentiation & Assay Strategy)
CD36 差异化筛选方案
- 差异化要素一:配体选择性阻断(Fatty Acid vs. Collagen/Platelet binding)
- 需求:候选抗体必须阻断 CD36 摄取棕榈酸(Palmitate)或 oxLDL,但不能干扰 CD36 与胶原蛋白(Collagen)或血小板糖蛋白的结合,以规避出血风险。
- Assay 策略:使用 CD36 稳转细胞株(由 TarMart Lentivirus 构建)进行流式细胞术分析。在候选抗体存在下,定量检测 Bodipy-FL-C12(荧光脂肪酸类似物)和 DiI-oxLDL 的细胞摄取抑制率。
- **差异化要素二:同家族选择性(Selectivity against SCARB1/