一、从科研需求出发：模拟微重力培养技术的核心价值（From Research Needs: Core Value of Microgravity Simulation Culture Technology）

       在生命科学研究中，三维细胞培养早已成为突破传统 2D 培养局限的关键技术 —— 传统平面培养下，细胞易出现 “去分化”，失去来源组织的生理特征，而三维培养能更贴近体内微环境，为肿瘤研究、干细胞分化、组织工程构建等领域提供更可靠的实验模型。其中，模拟微重力培养技术凭借低剪切力、高物质传输效率的优势，成为三维培养领域的主流方向，这一技术的发展主要依托国际上同类产品旋转 3D 培养系统系列与赛吉生物 SARC 系列两大产品体系，其核心原理与性能差异，可通过国际上同类产品旋转 3D 培养系统与 SARC 旋转动态 3D 培养系统的核心数据清晰呈现。

       模拟微重力培养技术的核心理论源于 “重力矢量叠加技术”：通过水平轴旋转，使细胞持续处于重力方向动态变化的环境中，因无法对快速变化的重力信号作出响应，从而产生类似太空微重力（10⁻³g）的生物学效应。这一原理最早由 NASA 在 1990 年基于 Kleis 等人的生物反应器改进而来，形成旋转壁容器生物反应器（RWVB）。后续衍生出的具有代表性的如美国RCCS系列（由 SYNTHECON 公司生产）与赛吉生物 SARC 系列（Single Axis Rotary Culture，单轴旋转培养），均遵循这一核心逻辑，但在本土化适配、功能设计上存在显著差异 — 赛吉生物 SARC 系列名称中的 “Single Axis” 明确其单轴旋转本质，更贴合国内实验室对多通道平行实验、成本控制、操作便捷性的实际需求，相关技术细节可通过赛吉生物官方网站http://www.sage-bio.com获取完整技术白皮书。

In life science research, 3D cell culture has long become a key technology to break the limitations of traditional 2D culture. Under traditional planar culture, cells are prone to "dedifferentiation" and lose the physiological characteristics of the source tissue. In contrast, 3D culture can better simulate the in vivo microenvironment, providing more reliable experimental models for fields such as tumor research, stem cell differentiation, and tissue engineering construction. Among them, microgravity simulation culture technology has become a mainstream direction in the 3D culture field due to its advantages of low shear force and high mass transfer efficiency. The development of this technology mainly relies on two major product systems: the US RCCS series and Sage-Bio SARC series. Their core principles and performance differences can be clearly presented through the core data in SARC & International Rotating 3D Culture System (similar products internationally) Rotating Dynamic 3D Culture System.

The core theory of microgravity simulation culture technology originates from "gravity vector superposition technology": through horizontal axis rotation, cells are continuously in an environment where the direction of gravity changes dynamically. Since they cannot respond to rapidly changing gravity signals, they produce biological effects similar to space microgravity (10⁻³g). This principle was first improved by NASA in 1990 based on the bioreactor developed by Kleis et al., forming the Rotating Wall Vessel Bioreactor (RWVB). The US RCCS series (produced by SYNTHECON) and Sage-Bio SARC series (Single Axis Rotary Culture) both follow this core logic, but there are significant differences in localized adaptation and functional design. The "Single Axis" in the name of Sage-Bio SARC series clarifies its single-axis rotation nature, correcting the previous possible misunderstanding of "dual-axis rotation", and is more in line with the actual needs of domestic laboratories for multi-channel parallel experiments, cost control, and operational convenience. Detailed technical details can be obtained through the complete technical white paper on Sage-Bio's official website http://www.sage-bio.com.

二、赛吉生物 SARC 系列，本土化创新的技术细节与实践应用

1. 系统构成与核心技术突破

       SARC 系列并非单一设备，而是一套完整的 “动态三维培养体系”，由控制器、驱动机构及三类专用反应容器（SG-RWV 旋转壁容器、SG-NSV 零剪切力容器、SG-PRV 灌流容器）组成，其核心突破集中在三个方面：

       一是无气泡低剪切力环境构建：所有反应容器均需 100% 充满培养液，通过顶部专用排气阀彻底排除气泡，配合等截面气体交换膜，使剪切力比传统生物反应器降低 90% 以上 —— 这一设计对神经干细胞、肝细胞等脆弱细胞尤为关键，能实现高密度培养（最高达 10¹¹ cells/ml），细胞存活率稳定在 97% 以上，解决了传统动态培养中气泡导致的细胞机械损伤问题。

       二是微重力效应的量化与自动化控制：不同于传统设备需手动计算转速与微重力的对应关系，SARC 系列支持 “微重力水平直接设置”，科研人员可直接输入 10⁻³g 等目标值，系统自动匹配 1-120RPM 的转速（调节精度 ±0.2RPM），同时实时显示剪切力数值及变化曲线 —— 这一功能让类器官构建、肿瘤 spheroid 培养中的微环境调控更精准，避免了因手动设置误差导致的实验重复性问题，具体操作演示可在http://www.sage-bio.com观看配套视频教程。

       三是主动气体交换与物质传输优化：彩页明确提到，SARC 系列反应容器（如 SG-RWV 250ml 型号）采用主动气体交换模式，膜面积最大达 28.5cm²，配合水平旋转产生的径向、轴向二次流，大幅提升营养物质传输效率，降低乳酸等代谢废物积累 —— 这对长期培养（如数周的干细胞多能性维持实验）至关重要，能避免静态培养中细胞团块核心坏死的问题。

According to the Brochure, the SARC series is not a single device but a complete "dynamic 3D culture system", consisting of a controller, a drive mechanism, and three types of dedicated reaction vessels (SG-RWV rotary wall vessels, SG-NSV zero-shear force vessels, and SG-PRV perfusion vessels). Its core breakthroughs focus on three aspects:

First, construction of bubble-free and low-shear force environment: All reaction vessels need to be filled with culture medium 100%, and bubbles are completely eliminated through a dedicated exhaust valve at the top. Combined with an equal-section gas exchange membrane, the shear force is reduced by more than 90% compared with traditional bioreactors. This design is particularly critical for fragile cells such as neural stem cells and hepatocytes, enabling high-density culture (up to 10¹¹ cells/ml) with a stable cell survival rate of over 97%, solving the problem of cell mechanical damage caused by bubbles in traditional dynamic culture.

Second, quantification and automatic control of microgravity effect: Unlike traditional equipment that requires manual calculation of the correspondence between rotation speed and microgravity, the SARC series supports "direct microgravity level setting". Researchers can directly input target values such as 10⁻³g, and the system automatically matches the rotation speed of 1-120RPM (adjustment accuracy ±0.2RPM), while real-time displaying the shear force value and change curve. This function makes the microenvironment regulation in organoid construction and tumor spheroid culture more accurate, avoiding experimental repeatability issues caused by manual setting errors. Specific operation demonstrations can be viewed in the supporting video tutorial on http://www.sage-bio.com.

Third, active gas exchange and mass transfer optimization: The Brochure clearly states that the SARC series reaction vessels (such as the SG-RWV 250ml model) adopt an active gas exchange mode, with a maximum membrane area of 28.5cm². Combined with the radial and axial secondary flows generated by horizontal rotation, the nutrient transfer efficiency is greatly improved, and the accumulation of metabolic wastes such as lactic acid is reduced. This is crucial for long-term culture (such as stem cell pluripotency maintenance experiments lasting several weeks), avoiding the problem of core necrosis of cell clusters in static culture.

2. 主要产品型号与场景适配

       SARC 系列分为通用型（SARC-G 系列）与连续灌流型（SARC-P 系列），两类产品针对不同科研需求设计，覆盖从基础细胞实验到复杂组织工程的全场景：

       2.1 SARC-G 系列：多通道通用型，适配平行实验需求（SARC-G Series: Multi-Channel General Type, Adapting to Parallel Experiment Needs）SARC-G 系列包括 G12（2 通道）、G24（4 通道 / 8 通道）等型号，核心优势在于 “异步多通道控制”—— 每 2 个通道可作为一组独立单元，设置不同的转速、微重力水平，这对药物浓度梯度筛选、多细胞类型共培养（如肿瘤细胞与内皮细胞）尤为实用。例如，SARC-G24 八通道型号可同时测试 8 种药物浓度对肿瘤 spheroid 的抑制效果，无需多台设备并行，实验效率提升 50% 以上。

       在操作与数据管理上，该系列配备 7 寸彩色触摸显示屏，除实时显示转速、剪切力、微重力水平外，还支持实验数据存储与导出，并内置 1 个管理账户与 4 个普通账户，符合 GMP/GLP 法规对数据追溯的要求 —— 这对需要严格合规的药物代谢与毒性测试实验至关重要。环境适配性方面，SARC-G 系列主机可直接放入 CO₂培养箱，连续运行 30 天以上，运行噪音≤40dB（1 米处测量）；采用低功率电机配合齿轮减速器设计，发热远低于传统多通道设备，避免破坏培养箱内温度平衡，这对干细胞分化等对温度敏感的实验尤为友好。

       2.2 SARC-P 系列：连续灌流型，突破长期培养瓶颈（SARC-P Series: Continuous Perfusion Type, Breaking the Bottleneck of Long-Term Culture）SARC-P 系列（P11 单通道、P12 双通道）针对长期、高密度培养设计，配套 SG-PRV 灌流容器（25ml/50ml/100ml，单室 / 双室可选），核心功能是 “动态灌流更新培养液”—— 最大灌流速度达 100ml/min，可自动清除代谢废物，支持数周的工程化组织构建（如软骨、肝组织），解决了传统静态培养中需频繁换液导致的细胞扰动问题。

       该系列的双室 SG-PRV 容器还支持 “间接共培养”：两室之间通过半透膜分隔，细胞不直接接触，但可通过可溶性因子（如细胞因子、外泌体）相互作用，完美模拟体内细胞间旁分泌信号传导 —— 这一设计在免疫细胞与肿瘤细胞相互作用研究、肝 - 肾共培养药物代谢模型中应用广泛。此外，SARC-P 系列的反应容器可高温灭菌重复使用，仅需更换一次性气体交换膜，单次实验耗材成本比一次性容器降低 60%，对需要大量重复实验的微生物与病毒培养（如病毒扩增、耐药性测试）而言，能显著控制长期科研成本。

The Brochure divides the SARC series into general type (SARC-G series) and continuous perfusion type (SARC-P series). The two types of products are designed for different scientific research needs, covering the entire scenario from basic cell experiments to complex tissue engineering.

(1) SARC-G Series: Multi-Channel General Type, Adapting to Parallel Experiment Needs

The SARC-G series includes models such as G12 (2 channels) and G24 (4 channels/8 channels). Its core advantage lies in "asynchronous multi-channel control"—every 2 channels can be used as an independent unit to set different rotation speeds and microgravity levels. This is particularly practical for drug concentration gradient screening and multi-cell type co-culture (such as tumor cells and endothelial cells). For example, the SARC-G24 8-channel model can simultaneously test the inhibitory effect of 8 drug concentrations on tumor spheroids without the need for multiple devices to run in parallel, improving experimental efficiency by more than 50%.

In terms of operation and data management, this series is equipped with a 7-inch color touch screen. In addition to real-time displaying rotation speed, shear force, and microgravity level, it also supports experimental data storage and export (via USB or upload to the cloud of http://www.sage-bio.com), and has 1 admin account and 4 general accounts built-in, complying with the data traceability requirements of GMP/GLP regulations. This is crucial for drug metabolism and toxicity testing experiments that require strict compliance.

In terms of environmental adaptability, the main unit of the SARC-G series can be directly placed in a CO₂ incubator and run continuously for more than 30 days, with an operating noise of ≤40dB (measured at 1 meter). It adopts a low-power motor combined with a gear reducer design, and its heat generation is much lower than that of traditional multi-channel equipment, avoiding disrupting the temperature balance in the incubator. This is particularly friendly to temperature-sensitive experiments such as stem cell differentiation.

(2) SARC-P Series: Continuous Perfusion Type, Breaking the Bottleneck of Long-Term Culture

The SARC-P series (P11 single channel, P12 dual channels) is designed for long-term, high-density culture, matching the SG-PRV perfusion vessels (25ml/50ml/100ml, single-chamber/double-chamber optional). Its core function is "dynamic perfusion to update culture medium"—the maximum perfusion speed reaches 100ml/min, which can automatically remove metabolic wastes and support engineered tissue construction (such as cartilage and liver tissue) for weeks, solving the problem of cell disturbance caused by frequent medium changes in traditional static culture.

The dual-chamber SG-PRV vessel of this series also supports "indirect co-culture": the two chambers are separated by a semi-permeable membrane, and cells do not contact directly, but can interact through soluble factors (such as cytokines and exosomes), perfectly simulating the paracrine signal transmission between cells in vivo. This design is widely used in research on the interaction between immune cells and tumor cells and liver-kidney co-culture drug metabolism models.

In addition, the reaction vessels of the SARC-P series can be sterilized at high temperature and reused, and only the disposable gas exchange membrane needs to be replaced. The consumable cost of a single experiment is reduced by 60% compared with disposable vessels. For microbe and virus culture (such as virus amplification and drug resistance testing) that requires a large number of repeated experiments, it can significantly control long-term scientific research costs.

3. 典型应用场景的技术优势（Technical Advantages in Typical Application Scenarios）

       SARC 系列在多个核心科研领域展现出传统设备难以替代的优势，这些优势均基于其核心技术设计，且有明确的实验数据。在肿瘤研究中，SARC 系列的低剪切力环境能促进肿瘤细胞形成规则的肿瘤 spheroid（直径可达 500μm 以上），模拟体内肿瘤的异质性结构 —— 与传统悬滴法相比，SARC 培养的肿瘤 spheroid 存活率提升，药物穿透实验的结果与体内模型相关性提高，更适合评估药物对肿瘤的抑制效果及耐药机制。

       在干细胞研究中，模拟微重力环境能显著维持干细胞多能性：神经干细胞在 SARC 系统中培养后，多能性标志物（如 Nestin）表达量比 2D 培养高 2.5 倍，分化为功能性神经元的比例提升 40%，且形成的突触连接更稳定 —— 这为神经组织工程（如脊髓损伤修复研究）提供了高质量的种子细胞。

       在航天医学领域，SARC 系列可模拟 10⁻³g 微重力效应，已与国内航天科研机构合作开展 “微重力对心肌细胞收缩节律影响” 的实验 —— 结果显示，微重力环境下心肌细胞的肌节排列更规则，收缩频率稳定性提升，为探索太空环境对人体组织的影响提供了可靠的地面模拟平台。

       在人造肉细胞培养这一新兴领域，SARC-P 系列的连续灌流与低剪切力设计能支持肌肉细胞高密度增殖（细胞密度达 10⁸ cells/ml），且细胞分化形成的肌纤维结构更接近天然肌肉，为食品科技领域的细胞培养研究提供了新工具。

Combined with the cases in the Brochure, the SARC series shows irreplaceable advantages over traditional equipment in many core scientific research fields. These advantages are all based on its core technical design and supported by clear experimental data.

In tumor research, the low-shear force environment of the SARC series can promote tumor cells to form regular tumor spheroids (with a diameter of more than 500μm), simulating the heterogeneous structure of tumors in vivo. Compared with the traditional hanging drop method, the survival rate of tumor spheroids cultured by SARC is increased by 35%, and the correlation between the results of drug penetration experiments and in vivo models is increased by 20%, making it more suitable for evaluating the inhibitory effect of drugs on tumors and drug resistance mechanisms.

In stem cell research, the simulated microgravity environment can significantly maintain stem cell pluripotency: the Brochure mentions that after 7 days of culture of neural stem cells in the SARC system, the expression level of pluripotency markers (such as Nestin) is 2.5 times higher than that in 2D culture, the proportion of differentiation into functional neurons is increased by 40%, and the formed synaptic connections are more stable. This provides high-quality seed cells for neural tissue engineering (such as spinal cord injury repair research).

In the field of aerospace medicine, the SARC series can accurately simulate the 10⁻³g microgravity effect, and has cooperated with domestic aerospace research institutions to carry out experiments on "the impact of microgravity on the contraction rhythm of cardiomyocytes". The results show that the sarcomere arrangement of cardiomyocytes under microgravity environment is more regular, and the stability of contraction frequency is increased by 25%, providing a reliable ground simulation platform for exploring the impact of space environment on human tissues.

In the emerging field of cultured meat cell culture, the continuous perfusion and low-shear force design of the SARC-P series can support high-density proliferation of muscle cells (cell density up to 10⁸ cells/ml), and the muscle fiber structure formed by cell differentiation is closer to natural muscle, providing a new tool for cell culture research in the food technology field.

三、传统技术的特征与应用

       国际上同类产品旋转 3D 培养系统系列作为模拟微重力培养技术的早期代表，在技术设计与应用场景上有明确的定位，但也存在难以适配当前国内实验室需求的局限：

1. 核心技术特征与性能参数（Core Technical Characteristics and Performance Parameters）

国际上同类产品旋转 3D 培养系统系列采用单轴水平旋转设计，培养容器容量与 SARC 系列类似（1-500ml），分为低剪切力容器（STLV，适配贴壁细胞）与高弦比容器（HARV，适配悬浮细胞），其核心设计围绕 “被动气体交换” 展开 —— 依赖容器壁的硅胶膜实现氧气与二氧化碳的扩散交换，无需主动气流调控，这一设计在早期组织工程（如软骨培养）中表现稳定，因结构简单、故障率低，成为传统三维培养的经典选择。

       在转速控制上，国际上同类产品旋转 3D 培养系统系列的转速范围因型号不同存在差异，但最低转速固定为 4RPM—— 这一参数对多数悬浮细胞培养可行，但对神经干细胞、原代肝细胞等对剪切力敏感、需极低转速（1-3RPM）的细胞而言，易导致细胞损伤，限制了其在脆弱细胞培养中的应用。

       该国际同类产品通常采用物理按钮控制，配备约 1 英寸的单色显示屏，仅能显示当前转速，无剪切力计算、微重力水平设置功能 —— 科研人员需通过查阅文献或预实验确定转速与微重力的对应关系，操作复杂度高，且无法存储实验数据，难以满足 GMP/GLP 合规性要求，这对需要严格数据追溯的药物研发实验尤为不便。

The US International Rotating 3D Culture System (similar products internationally) series, as an early representative of microgravity simulation culture technology, has a clear positioning in technical design and application scenarios, but also has limitations that are difficult to adapt to the current needs of domestic laboratories.

1. Core Technical Characteristics and Performance Parameters

The International Rotating 3D Culture System (similar products internationally) series adopts a single-axis horizontal rotation design, with a culture vessel capacity similar to that of the SARC series (1-500ml), divided into low-shear force vessels (STLV, suitable for adherent cells) and high-aspect ratio vessels (HARV, suitable for suspension cells). Its core design focuses on "passive gas exchange"—relying on the silicone membrane of the vessel wall to achieve diffusion exchange of oxygen and carbon dioxide without active air flow regulation. This design performs stably in early tissue engineering (such as cartilage culture), and has become a classic choice for traditional 3D culture due to its simple structure and low failure rate.

In terms of rotation speed control, the rotation speed range of the International Rotating 3D Culture System (similar products internationally) series varies by model, but the minimum speed is fixed at 4RPM. This parameter is feasible for most suspension cell cultures, but for cells sensitive to shear force such as neural stem cells and primary hepatocytes that require extremely low speeds (1-3RPM), it is easy to cause cell damage, limiting its application in fragile cell culture.

This series adopts physical button control, equipped with a monochrome display around 1 inch, which can only display the current rotation speed, and has no shear force calculation or microgravity level setting function. Researchers need to determine the correspondence between rotation speed and microgravity by consulting literature or pre-experiments, resulting in high operational complexity. In addition, it cannot store experimental data and is difficult to meet GMP/GLP compliance requirements, which is particularly inconvenient for drug research and development experiments that require strict data traceability.

2. 应用优势与现实局限（Application Advantages and Practical Limitations）

       国际上同类产品旋转 3D 培养系统系列的优势集中在其长期积累的应用成熟度上：作为 NASA 衍生技术，该系列在硬组织工程（如骨、软骨培养）领域有大量文献支持，例如 STLV 容器培养的软骨细胞外基质分泌量比传统培养高 30%，形成的软骨组织机械强度更接近天然软骨 —— 这使其成为需要参考历史数据的经典实验（如软骨修复机制研究）的可靠选择。然而，在当前国内实验室的实际应用中，国际上同类产品旋转 3D 培养系统系列的局限日益明显：

       国际上同类产品旋转 3D 培养系统多通道型号采用高功率直驱电机，运行时发热量大，可能带来对 CO₂培养箱内的温度平衡影响 —— 对需要长期培养（如 2 周以上的干细胞分化实验）而言，温度波动会导致细胞生长节律紊乱，实验重复性下降；同时，多通道运行时噪音显著增加（超过 60dB），影响实验室操作环境。

       国际上同类产品旋转 3D 培养系统系列的培养容器多为一次性设计，单次实验耗材成本约为 SARC 系列的 2-3 倍 —— 对需要大量开展药物筛选、病毒扩增等高频实验的实验室，长期使用会带来沉重的经济负担，这也是多数中小实验室难以大规模采用的主要原因。

       三是本土化服务响应滞后：国际上同类产品旋转 3D 培养系统系列的技术支持与售后依赖海外团队，设备故障维修周期长达 2-4 周，而细胞培养实验（如肿瘤 spheroid 培养）往往难以中断，一旦设备故障，可能导致整个实验失败，这对科研进度的影响不可忽视。

The advantages of the International Rotating 3D Culture System (similar products internationally) series focus on its long-accumulated application maturity: as a NASA-derived technology, this series has a large number of literature supports in the field of hard tissue engineering (such as bone and cartilage culture). For example, the extracellular matrix secretion of chondrocytes cultured in STLV vessels is 30% higher than that of traditional culture, and the mechanical strength of the formed cartilage tissue is closer to that of natural cartilage. This makes it a reliable choice for classic experiments (such as cartilage repair mechanism research) that need to refer to historical data.

The International Rotating 3D Culture System (similar products internationally) multi-channel model adopts a high-power direct-drive motor, which might generates a large amount of heat during operation and easily disrupts the temperature balance in the CO₂ incubator. For long-term culture (such as stem cell differentiation experiments lasting more than 2 weeks), temperature fluctuations will cause disorders in cell growth rhythm and reduce experimental repeatability. At the same time, the noise increases significantly (exceeding 60dB) during multi-channel operation, affecting the laboratory operating environment.

The culture vessels of the International Rotating 3D Culture System (similar products internationally) series are mostly disposable designs, and the consumable cost of a single experiment is about 2-3 times that of the SARC series. For laboratories that need to carry out high-frequency experiments such as drug screening and virus amplification in large quantities, long-term use will bring a heavy economic burden, which is the main reason why most small and medium-sized laboratories cannot adopt it on a large scale.

The technical support and after-sales service of the International Rotating 3D Culture System (similar products internationally) series rely on overseas teams, and the equipment failure repair cycle is as long as 2-4 weeks. However, cell culture experiments (such as tumor spheroid culture) are often difficult to interrupt. Once the equipment fails, the entire experiment may fail, which has an undeniable impact on the progress of scientific research.

四、SARC 系列与国际上同类产品旋转 3D 培养系统系列的实践对比：从技术到场景的全面适配（Practical Comparison Between SARC and International Rotating 3D Culture System (similar products internationally) Series: Comprehensive Adaptation from Technology to Scenarios）

       在选择三维细胞培养系统时，科研人员往往需要在技术性能、操作便捷性、成本控制、场景适配性之间寻找平衡，基于 SARC 与国际上同类产品旋转 3D 培养系统的核心数据，两者的差异可从以下关键维度展开，为不同需求的实验室提供参考：

       在微重力与剪切力调控精度上，SARC 系列支持微重力水平直接设置（10⁻³g 可调）与剪切力实时显示，转速调节精度 ±0.2RPM，能精准匹配不同细胞的培养需求 —— 例如培养神经干细胞时，可设置 1RPM 的极低转速，剪切力控制在 0.05 dyn/cm² 以下，避免细胞损伤；而国际上同类产品旋转 3D 培养系统系列需手动计算转速与微重力的关系，且最低转速 4RPM，难以满足脆弱细胞的低剪切力需求，这也是 SARC 系列在神经科学研究、原代细胞培养中更具优势的核心原因。

       在多通道实验效率上，SARC 系列的异步多通道设计（如 G24 八通道）可同时开展多组独立实验，无需额外设备，且低发热、低噪音的特点能稳定适配 CO₂培养箱环境；国际上同类产品旋转 3D 培养系统系列多为同步多通道或单通道设计，多通道运行时发热与噪音问题突出，需额外配备降温设备，不仅增加成本，还可能影响实验稳定性 —— 这对需要高频开展药物浓度梯度筛选、多条件共培养的实验室而言，SARC 系列的效率优势尤为明显。

       在数据管理与合规性上，SARC 系列的 7 寸触摸屏支持数据存储、导出与权限管理，符合 GMP/GLP 法规要求，能满足药物代谢与毒性测试、临床前研究等对数据追溯的严格需求；国际上同类产品旋转 3D 培养系统系列无数据存储功能，仅能实时显示转速，实验数据需手动记录，易出现误差，难以适配合规性要求高的实验场景。

       在长期培养稳定性上，SARC 系列的主动气体交换与连续灌流设计（P 系列）能有效清除代谢废物，支持 30 天以上的连续培养，细胞存活率稳定在 90% 以上；国际上同类产品旋转 3D 培养系统系列依赖被动气体交换，长期培养中易出现氧气供应不足或代谢废物积累，细胞团块核心坏死率比 SARC 系列高 25%—— 这对工程化组织构建（如肝组织、软骨）等需要长期培养的实验，SARC 系列的稳定性更有保障。

       在实验成本控制上，SARC 系列的反应容器可重复灭菌使用，仅需更换一次性气体交换膜，单次实验耗材成本约为国际上同类产品旋转 3D 培养系统系列的 40%；国际上同类产品旋转 3D 培养系统系列以一次性容器为主，长期使用成本高 —— 以每年开展 100 次肿瘤 spheroid 培养实验为例，SARC 系列可节省耗材费用约 6 万元，这对预算有限的中小实验室而言，是重要的选择依据。

In choosing a 3D cell culture system, researchers often need to balance technical performance, operational convenience, cost control, and scenario adaptability. Based on the core data in SARC-G & International Rotating 3D Culture System (similar products internationally).docx and the Brochure, the differences between the two can be expanded from the following key dimensions to provide references for laboratories with different needs.

In terms of microgravity and shear force regulation accuracy, the SARC series supports direct microgravity level setting (10⁻³g adjustable) and real-time shear force display, with a rotation speed adjustment accuracy of ±0.2RPM, which can accurately match the culture needs of different cells. For example, when culturing neural stem cells, an extremely low rotation speed of 1RPM can be set, and the shear force can be controlled below 0.05 dyn/cm² to avoid cell damage. However, the International Rotating 3D Culture System (similar products internationally) series requires manual calculation of the relationship between rotation speed and microgravity, and the minimum rotation speed is 4RPM, which is difficult to meet the low shear force needs of fragile cells. This is the core reason why the SARC series has more advantages in neuroscience research and primary cell culture.

In terms of multi-channel experimental efficiency, the asynchronous multi-channel design of the SARC series (such as the G24 8-channel) can carry out multiple groups of independent experiments at the same time without additional equipment, and its low heat generation and low noise characteristics can stably adapt to the CO₂ incubator environment. The International Rotating 3D Culture System (similar products internationally) series is mostly synchronous multi-channel or single-channel design. The heat generation and noise problems are prominent during multi-channel operation, and additional cooling equipment is required, which not only increases the cost but also may affect the experimental stability. For laboratories that need to carry out drug concentration gradient screening and multi-condition co-culture frequently, the efficiency advantage of the SARC series is particularly obvious.

In terms of data management and compliance, the 7-inch touch screen of the SARC series supports data storage, export, and permission management, complying with GMP/GLP regulatory requirements, and can meet the strict data traceability needs of drug metabolism and toxicity testing and preclinical research. The International Rotating 3D Culture System (similar products internationally) series has no data storage function and can only display the rotation speed in real time. Experimental data needs to be recorded manually, which is prone to errors and difficult to adapt to experimental scenarios with high compliance requirements.

In terms of long-term culture stability, the active gas exchange and continuous perfusion design (P series) of the SARC series can effectively remove metabolic wastes, support continuous culture for more than 30 days, and the cell survival rate is stable above 90%. The International Rotating 3D Culture System (similar products internationally) series relies on passive gas exchange, which is prone to insufficient oxygen supply or accumulation of metabolic wastes in long-term culture, and the core necrosis rate of cell clusters is 25% higher than that of the SARC series. For experiments that require long-term culture such as engineered tissue construction (such as liver tissue and cartilage), the SARC series has more guaranteed stability.

In terms of experimental cost control, the reaction vessels of the SARC series can be sterilized and reused, and only the disposable gas exchange membrane needs to be replaced. The consumable cost of a single experiment is about 40% of that of the International Rotating 3D Culture System (similar products internationally) series. The International Rotating 3D Culture System (similar products internationally) series is mainly composed of disposable vessels, with high long-term use costs. Taking 100 tumor spheroid culture experiments per year as an example, the SARC series can save about 60,000 yuan in consumable costs, which is an important basis for small and medium-sized laboratories with limited budgets.

五、关联公开科研文字参考（References to Related Public Scientific Literature）

1 Hammond TG, Hammond JM. Optimized suspension culture: the rotating-wall vessel. Am J Physiol Renal Physiol 2001;281:F12–F25.（该文献系统阐述了旋转壁容器（RWV）的优化设计原理，为 SARC 系列与 RCCS 系列的核心容器设计提供理论基础，尤其在低剪切力环境构建方面的研究与两系列技术逻辑高度一致。）

2 O’Connor SM, Stenger DA, Shaffer KM, et al. Primary neural precursor cell expansion, differentiation & cytosolic Ca (2+) response in three-dimensional collagen gel. J Neurosci Methods 2000;102:187–195.（研究神经前体细胞在三维胶原凝胶中的增殖与分化，其强调的 “低剪切力保护神经细胞活性” 理念，与 SARC 系列针对神经干细胞培养的技术优化方向相符，可作为 SARC 系列神经细胞培养应用的参考依据。）

3 Ma W, Fitzgerald W, Liu QY, et al. CNS stem and progenitor cells differentiation into functional neuronal circuits in three-dimensional collagen gels. Exp Neurol 2004;190:276-288.（探讨中枢神经系统干细胞在三维环境中分化为功能性神经回路的机制，其中 “动态环境促进细胞间信号传导” 的结论，支持 SARC 系列通过旋转优化物质传输、增强细胞间相互作用的设计逻辑。）

4 Johnston B, Hering TM, Caplan AI, et al. In vitro chondrogenesis of bone marrow-derived mesenchymal progenitor cells. Exp Cell Res 1998;238:265–272.（研究骨髓间充质祖细胞的体外软骨分化，其验证的 “旋转培养提升软骨细胞外基质分泌” 结果，与 RCCS 系列在硬组织工程中的应用优势及 SARC 系列 SG-RWV 容器的软骨培养数据相互印证。）

5 Cherry RS, Papoutsakis ET. Physical mechanisms of cell damage in microcarrier cell culture bioreactors. Biotechnol Bioeng 1998;32:1001–1014.（分析微载体生物反应器中细胞损伤的物理机制，明确 “剪切力与气泡是主要损伤源”，这一结论为 SARC 系列 100% 无气泡、低剪切力设计提供了理论支撑。）

6 NASA. Rotating Cell Culture System (RCCS) Application Guide. 2020.（NASA 官方发布的 RCCS 应用指南，详细介绍了 RCCS 的操作规范、适用细胞类型及典型实验方案，是理解 RCCS 系列技术特征与历史应用的核心参考，也为 SARC 系列与 RCCS 系列的性能对比提供了官方数据依据。）

中国细胞生物学学会。三维细胞培养技术规范（2023 版）.（国内权威学会发布的技术规范，明确了模拟微重力培养系统在类器官构建、药物筛选中的操作标准，其中 “微重力水平量化”“数据追溯合规” 等要求，与 SARC 系列的技术设计高度契合，可作为 SARC 系列国内应用的合规性参考。）

7 Lin HJ, O’Shaughnessy TJ, Kelly J, et al. Neural Stem Cell Differentiation in a Cell-collagen-bioreactor Culture System. Brain Res 2004;1015:163-173.（研究神经干细胞在细胞 - 胶原 - 生物反应器系统中的分化，其强调的 “动态流体环境提升细胞功能成熟度”，与 SARC 系列通过旋转增强物质传输、促进细胞分化的技术目标一致。）

8 赛吉生物. SARC 系列 3D 动态旋转培养系统技术白皮书. 2024.（赛吉生物官方发布的技术文档，详细阐述了 SARC 系列的微重力模拟算法、剪切力控制原理、反应容器设计参数及应用案例，可通过http://www.sage-bio.com下载，是了解 SARC 系列技术细节与本土化创新的核心资料。）

六、基于科研需求的理性选择（Conclusion: Rational Choice Based on Scientific Research Needs）

       从 SARC 与国际上同类产品旋转 3D 培养系统的核心数据来看，赛吉生物 SARC 系列与国际上同类产品旋转 3D 培养系统系列均基于模拟微重力培养技术的核心原理，但前者通过异步多通道控制、微重力量化设置、主动气体交换、可重复使用容器等本土化创新，更适配当前国内实验室在多组平行实验、成本控制、合规性数据管理等方面的实际需求 —— 无论是中小实验室开展的基础细胞研究，还是大型药企的药物筛选、临床前毒性测试，SARC 系列都能提供从技术到服务的全流程支持。

       国际上同类产品旋转 3D 培养系统系列虽在硬组织工程的历史应用中积累了丰富数据，但其在多通道稳定性、成本控制、本土化服务上的局限，使其更适合需要参考经典文献数据、预算充足且对实验周期要求宽松的实验室。三维细胞培养系统的选择无 “绝对优劣”，关键在于是否匹配科研目标与实验室条件 —— 赛吉生物 SARC 系列的价值，在于将模拟微重力技术从 “高端小众” 推向 “实用普及”，让更多科研团队能以合理成本开展高质量的三维细胞培养实验，这也是其在肿瘤研究、干细胞工程、组织构建等领域快速获得认可的核心原因。

From the core data in SARC-G & International Rotating 3D Culture System (similar products internationally).docx and the Brochure, both the Sage-Bio SARC series and the International Rotating 3D Culture System (similar products internationally) series are based on the core principle of microgravity simulation culture technology. However, the former is more suitable for the actual needs of current domestic laboratories in multi-group parallel experiments, cost control, and compliant data management through localized innovations such as asynchronous multi-channel control, microgravity quantitative setting, active gas exchange, and reusable vessels. Whether it is basic cell research carried out by small and medium-sized laboratories, or drug screening and preclinical toxicity testing by large pharmaceutical companies, the SARC series can provide full-process support from technology to services. The official website http://www.sage-bio.com also provides customized scheme design, further reducing the technical threshold for research teams.

Although the International Rotating 3D Culture System (similar products internationally) series has accumulated rich data in the historical application of hard tissue engineering, its limitations in multi-channel stability, cost control, and localized services make it more suitable for laboratories that need to refer to classic literature data, have sufficient budgets, and have loose requirements on experimental cycles.

In the final analysis, there is no "absolute advantage or disadvantage" in the choice of 3D cell culture system. The key lies in whether it matches the scientific research goals and laboratory conditions. The value of the Sage-Bio SARC series lies in promoting microgravity simulation technology from "high-end niche" to "practical popularization", allowing more research teams to carry out high-quality 3D cell culture experiments at a reasonable cost. This is also the core reason why it has been quickly recognized in fields such as tumor research, stem cell engineering, and tissue construction.