Background: Chinese Hamster Ovary cells (CHO) are the most preferred host cells to meet the increasing demand for high quality 'human-like' complex biologics production, but is faced with the challenge of achieving high yield at an affordable price. Secreted proteins critically impact cell growth and product quality and quantity and an integral part of secretome is the packaged microvesicles. In spite of numerous efforts to characterize spent-media proteome, none have identified specific contribution of microvesicles, necessitating further differential analysis of these defined fractions of spent-media proteome, specifically packaged microvesicles.
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