Category : cell culture

Written on Jun, 09, 2020 by in , ,

Spheroids have been used in cell culture for decades. In the 1980s, different types of human cancer cells –normally grown as monolayers or suspension cultures–were tested for their innate abilities to form and grow as spheroids in vitro (1). 16 out of 27 tested tumor cell lines successfully formed spheroids (1). In the tumor cells study, scientists also observed that all large spheroids had necrotic centers but their shapes varied. Another study used V79 hamster cells (V79 379A), a human small cell carcinoma of the lung (ME/MAR) and 2 xenographed human melanomas (HX117 and HX118) in spheroids cultures in the 1980s (2). In the study, the effects on spheroid growth due to radiation treatments were measured and evaluated (2).

Widely acknowledged is the unique ability of spheroids to mimic natural cell responses and interactions. Cells in 3D are more representative of their native conditions than the traditional 2D monolayer culturing conditions (e.g., cell-to-cell interactions, drug-induced responses, and cells-to-environment responses). Furthermore, the multicellular arrangement allows different cell types to interact with each other within each spheroid. Past studies examined growth rates, hypoxic conditions, and other survival conditions for the spheroids (1-2). Currently, many cell culture reagents and instruments are available to enable spheroid cultures, making the technique increasingly accessible, flexible and approachable for scientists in a variety of research fields. (Unlock your creative minds!)

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Most of us will remember from high school biology class that kidneys comprise part of the excretory system and function in toxin removal, maintaining electrolyte homeostasis and regulating the body’s acid-base balance. Beyond this, proper kidney function is also critical for the secretion of several important hormones such as erythropoietin and renin, which regulate red blood cell production and arterial blood pressure, respectively. Given the complex roles of the kidney, it’s no surprise that its structure is just as complex with many different parts and cell types working together to carry out its functions.  (more…)

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Written on Jul, 02, 2018 by in ,

Organoids are in vitro-derived miniaturized organs that exhibit self-organization and recapitulate the functions of the in vivo organ they represent. For organoids to mimic their real-life counterparts as much as possible, they must receive appropriate physical and biochemical cues. These cues might include:

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