Name: Mitochondrial Depletion by Rhodamine 6G for Transmitochondrial Cybrid Generation
Uploaded: 2023-03-17T14:20:00
Description: Watch this Scientific Journal Video about Mitochondrial Depletion by Rhodamine 6G for Transmitochondrial Cybrid Generation at JoVE.com

The video outlines a procedure for mitochondrial depletion in a recipient cell line using Rhodamine 6G treatment. It details the seeding of cells, daily treatments, medium supplementation for cell viability, and preparation steps before mitochondrial fusion, highlighting the resulting pink coloration of the treated cells.

mitochondrial depletion by rhodamine 6g for transmitochondrial cybrid generation

현탁액 성장 암세포에서 투과연골 Cybrid 생성

Reprogramming energy metabolism is a hallmark of cancer1 that was observed for the first time by Otto Warburg in the 1930s2. Under aerobic conditions, normal cells convert glucose into pyruvate, that then generates acetyl-coA, fuelling the mitochondrial machinery and promoting cellular respiration. Nevertheless, Warburg demonstrated that, even under normoxic conditions, most cancer cells convert pyruvate obtained from the glycolysis process into lactate, shifting their way to obtain energy. This metabolic adjustment is known as the &#34;Warburg effect&#34; and enables some cancer cells to supply their energetic demands for rapid growth and division, despite generating ATP less efficiently than the aerobic process3,4,5. In recent decades, numerous works have supported the implication of metabolism reprogramming in cancer progression. Hence, tumor energetics is considered an interesting target against cancer1. As a central hub in energetic metabolism and in the supply of essential precursors, mitochondria play a key role in these cell adaptations that, to date, we only partially understand.
In line with the above, mitochondrial DNA (mtDNA) mutations have been proposed as one of the possible causes of this metabolic reprogramming, which could lead to an impaired electron transport chain (ETC) performance6 and would explain why some cancer cells enhance their glycolytic metabolism to survive. Indeed, it has been reported that mtDNA accumulates mutations within cancer cells, being present in at least 50% of tumors7. For example, a recent study carried out by Yuan et al. reported the presence of hypermutated and truncated mtDNA molecules in kidney, colorectal, and thyroid cancers8.&#160;Moreover, many works have demonstrated that certain mtDNA mutations are associated with a more aggressive tumor phenotype and with an increase in the metastatic potential of cancer cells9,10,11,12,13,14,15,16.
Despite the apparent relevance of the mitochondrial genome in cancer progression, the study of these mutations and their contribution to the disease have been challenging due to limitations in the experimental models and technologies currently available17. Thus, new techniques to understand the real impact of mitochondria DNA in cancer disease development and progression are needed. In this work, we introduce a protocol for transmitochondrial cybrid generation from suspension-growing cancer cells, based on the repopulation of rhodamine 6G-pretreated cells with isolated mitochondria, that overcomes the main challenges of traditional cybridization methods18,19. This methodology allows the use of any nuclei donor regardless of the availability of their corresponding &#961;0 cell line and the transfer of mitochondria from cells that, following the traditional techniques, would be difficult to enucleate (i.e., non-adherent cell lines).

저자 스포트라이트: 암 세포주를 사용한 투과연골 Cybrid 생성  

암 세포주를 이용한 트랜스미토콘드리아 Cybrid 생성

This research aims to better understand the contribution of mitochondrion in cancer progression and metastasis. The transmitochondrial cybrid generation can help us to elucidate how and at what level mitochondrial genotypes are involved in the aggressiveness of a tumor cell. One of the technologies to obtain information on mitochondrial role in cancer is cybrid generation.We combine this tool with a variety of other methods that include donative electrophoresis, respiration analysis and other mitochondrial functional assays, flow cytometry, proteomics, et cetera. The plasticity of cancer cells together with the interaction networks between nuclear and mitochondrial genes, increases the complexity of our experiments and data interpretation. This is one of the reasons why is necessary to develop a new experimental approaches.One of the most exciting findings from our research has been the discovery of two mitochondrial DNA mutations associated with detachment of cells from the play dish resembling metastasis generation and making the cells completely dependent on aerobic glycolysis, and also making them more tumorigenic and metastatic in in vivo models. This mitochondria exchange protocol can be applied to suspension growing cancer cells. The chronology can overcome the limitations of traditional approaches where the nucleation process and the complete removal of mitochondrial DNA from mitochondrial recipient cell lines often become a real challenge.

Watch this Scientific Journal Video about Mitochondrial Depletion by Rhodamine 6G for Transmitochondrial Cybrid Generation at JoVE.com

Mitochondrial Depletion by Rhodamine 6G for Transmitochondrial Cybrid Generation  

트랜스미토콘드리아 Cybrid 생성을 위한 Rhodamine 6G에 의한 미토콘드리아 고갈

미토콘드리아 수용자 세포주의 미토콘드리아 고갈을 수행하기 위해 10% FBS와 페니실린-스트렙토마이신을 함유한 완전 배양 배지를 사용하여 6웰 플레이트에 100만 개의 세포를 시딩합니다. 세포주의 종류에 따라 3-7일 동안 최적의 농도인 Rhodamine 6G로 매일 세포를 처리하십시오. 세포를 살아있게하려면 세포 배양 배지에 우리 딘 밀리리터 당 50 마이크로 그램과 피루 베이트 밀리 리터 당 100 마이크로 그램을 보충하십시오.공여 세포주로부터 분리된 미토콘드리아를 미토콘드리아와 융합시키기 전에 처리 후, Rhodamine 6G 처리된 세포의 배지를 제거하고 Rhodamine 6G 없이 완전한 세포 배양 배지를 추가한다. 섭씨 37도에서 5 % 이산화탄소로 3-4 시간 동안 세포를 배양하십시오. 마지막으로, 융합을 위해 전처리된 로다민 6G 세포를 준비하고, 이를 15 밀리리터 튜브에 모으고, 튜브를 실온 및 520G에서 5분 동안 원심분리한다.펠릿은 로다민 6G 처리로 인해 네온 핑크색을 얻습니다.

Research

JoVE Journal

Cancer Research

Mitochondrial Depletion by Rhodamine 6G for Transmitochondrial Cybrid Generation

Transmitochondrial Cybrid Generation Using Cancer Cell Lines

In recent years, the number of studies dedicated to ascertaining the connection between mitochondria and cancer has significantly risen. However, more ...