en Stem Cell Stem Cell Original Article Original Article <p style="text-align: justify;"><span style="font-size:12px;"><span style="font-family:Tahoma;"><span style="line-height:14.0pt">Mesenchymal stem cell-conditioned media (MSC-CM) represents a promising cell-free therapeutic strategy in regenerative medicine, leveraging the paracrine effects of stem cells. Standardized biochemical characterization of MSC-CM is crucial for ensuring its reproducibility and therapeutic potential. However, statistical validation of batch-to-batch reproducibility has been rarely reported. Therefore, this study aimed to establish a reproducible protocol for AD-MSC-CM production and quantitatively demonstrate batch-to-batch reproducibility of total protein and key growth factors. Adipose-derived MSCs (AD-MSCs) were isolated from rat adipose tissue, expanded, and used to produce conditioned media (MSC-CM). The MSC-CM was biochemically profiled using the Bradford assay for total protein concentration and specific enzyme-linked immunosorbent assays (ELISAs) for quantifying Transforming Growth Factor-Beta (TGF-&beta;) and Vascular Endothelial Growth Factor (VEGF). Analyses were performed on three independent biological replicates. The MSC-CM showed a significant and consistent increase in total protein concentration compared to control serum-free medium. Quantitative analysis revealed reproducible and stable secretion of key growth factors. The concentrations of both TGF-&beta; and VEGF showed no significant variation across the biological replicates, confirming the high reproducibility of the MSC-CM preparation protocol. This study established a robust method for generating reproducible AD-MSC-CM, characterized by a stable and enriched content of total protein and specific growth factors (TGF-&beta; and VEGF). The findings confirm the reliability of the production process and highlight the hypothesized<b> </b>potential of this well-characterized MSC-CM as a consistent therapeutic agent for applications requiring immunomodulation and angiogenesis, pending direct functional validation.</span></span></span></p> Mesenchymal stem cell-conditioned media (MSC-CM), Adipose-derived Mesenchymal stem cell, Secretome, Cell-free therapy, Regenerative medicine. 1409 1419 http://ijmcmed.org/browse.php?a_code=A-10-9112-1&slc_lang=en&sid=1 Nahid Nasiri anahid.1333@yahoo.com 100319475328460038292 100319475328460038292 No Department of Medical Laser, Medical Laser Research Center, Yara Institute, ACECR, Tehran, Iran. Shaghayegh Gholami shagha_yegh1996@yahoo.com 100319475328460038293 0009-0004-2872-6775 No Department of Medical Laser, Medical Laser Research Center, Yara Institute, ACECR, Tehran, Iran. Armin Nazemi Zadeh arminnazemi@gmail.com 100319475328460038294 100319475328460038294 No Department of Photodynamic, Medical Laser Research Center, Yara Institute, ACECER, Tehran. Iran Seyed Mehdi Tabaei tabaie@acecr.ac.ir 100319475328460038295 100319475328460038295 Yes Department of Medical Laser, Medical Laser Research Center, Yara Institute, ACECR, Tehran, Iran.