Background: Mesenchymal stem cells (MSCs) play an important role in tumour progression; concomitantly, MSCs also undergo profound changes in thetumour microenvironment (TME). These changes can directly impact the application and efficacy of MSC-based anti-tumour therapy. However, few studies have focused on the regulation of MSC fate in TME, which will limit the progress of MSC-based anti-tumour therapy. Herein, we investigated the effects of conditioned medium from human hepatocellular carcinoma cells (HCC-CM) on the phenotype and glucose metabolism of human adipose tissue-derived MSCs (hAT-MSCs).
Methods: hAT-MSCs were exposed to conditioned medium from Hep3B, Huh7 and HCCLM3cells for 4-8 weeks in vitro. Then, CCK-8 assay, EdU assay, Transwell assay, and flow cytometry were used to assess the alterations in cell phenotype in terms of cell proliferation, migration, invasion, cell cycle, and apoptosis. In addition, glucose metabolism was evaluated by related kits. Next,cells were subjected to withdrawal from HCC-CM for 2-4 weeks, andalterations in phenotype and glucose metabolism were reevaluatedin hAT-MSCs.Finally, the molecular mechanism was clarified by Western blotting.
Results: The results revealed that after exposure to HCC-CM, hAT-MSCs developed a stellate-shaped morphology. In association with cytoskeleton remodelling, hAT-MSCs showed enhanced capacities for migration and invasion, while cell proliferation was inhibited by regulating the cell cycle by downregulatingcyclins and cyclin-dependent kinases and activating the mitochondrial apoptosis pathway. In terms of glucose metabolism, our results showed mitochondrial dysfunction and elevated glycolysis of hAT-MSCs. However, interestingly, when hAT-MSCs were subjected towithdrawal from HCC-CM, the alterations in phenotype and glucose metabolism could be reversed. Further studies showed that these changes in hAT-MSCs may be regulated bythe ROS/MAPK/HIF-1α signalling pathway.
Conclusion:Taken together, the effects of long-term HCC-CM treatment on phenotype and glucose metabolism in hAT-MSCs are modest and largely reversible after withdrawal. This is the first report on the reversal of phenotype and glucose metabolism in tumour-associated MSCs (TA-MSCs), and it is anticipated that new insights into TA-MSCs will lead to the development of novel strategies for MSC-based anti-tumour therapy.

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6
Loading...
On 31 Oct, 2020
Received 27 Oct, 2020
On 26 Oct, 2020
Invitations sent on 22 Oct, 2020
On 21 Oct, 2020
On 20 Oct, 2020
On 20 Oct, 2020
On 10 Oct, 2020
Received 03 Oct, 2020
On 29 Sep, 2020
Received 22 Sep, 2020
On 17 Sep, 2020
Invitations sent on 17 Sep, 2020
On 17 Sep, 2020
On 16 Sep, 2020
On 16 Sep, 2020
On 23 Aug, 2020
Received 22 Aug, 2020
Received 14 Aug, 2020
On 10 Aug, 2020
On 08 Aug, 2020
Invitations sent on 06 Aug, 2020
On 04 Aug, 2020
On 03 Aug, 2020
On 03 Aug, 2020
Posted 14 May, 2020
On 09 Jul, 2020
Received 03 Jul, 2020
Received 29 Jun, 2020
Received 29 Jun, 2020
On 18 Jun, 2020
On 16 Jun, 2020
On 16 Jun, 2020
Invitations sent on 15 Jun, 2020
On 14 May, 2020
On 13 May, 2020
On 08 May, 2020
On 06 May, 2020
On 31 Oct, 2020
Received 27 Oct, 2020
On 26 Oct, 2020
Invitations sent on 22 Oct, 2020
On 21 Oct, 2020
On 20 Oct, 2020
On 20 Oct, 2020
On 10 Oct, 2020
Received 03 Oct, 2020
On 29 Sep, 2020
Received 22 Sep, 2020
On 17 Sep, 2020
Invitations sent on 17 Sep, 2020
On 17 Sep, 2020
On 16 Sep, 2020
On 16 Sep, 2020
On 23 Aug, 2020
Received 22 Aug, 2020
Received 14 Aug, 2020
On 10 Aug, 2020
On 08 Aug, 2020
Invitations sent on 06 Aug, 2020
On 04 Aug, 2020
On 03 Aug, 2020
On 03 Aug, 2020
Posted 14 May, 2020
On 09 Jul, 2020
Received 03 Jul, 2020
Received 29 Jun, 2020
Received 29 Jun, 2020
On 18 Jun, 2020
On 16 Jun, 2020
On 16 Jun, 2020
Invitations sent on 15 Jun, 2020
On 14 May, 2020
On 13 May, 2020
On 08 May, 2020
On 06 May, 2020
Background: Mesenchymal stem cells (MSCs) play an important role in tumour progression; concomitantly, MSCs also undergo profound changes in thetumour microenvironment (TME). These changes can directly impact the application and efficacy of MSC-based anti-tumour therapy. However, few studies have focused on the regulation of MSC fate in TME, which will limit the progress of MSC-based anti-tumour therapy. Herein, we investigated the effects of conditioned medium from human hepatocellular carcinoma cells (HCC-CM) on the phenotype and glucose metabolism of human adipose tissue-derived MSCs (hAT-MSCs).
Methods: hAT-MSCs were exposed to conditioned medium from Hep3B, Huh7 and HCCLM3cells for 4-8 weeks in vitro. Then, CCK-8 assay, EdU assay, Transwell assay, and flow cytometry were used to assess the alterations in cell phenotype in terms of cell proliferation, migration, invasion, cell cycle, and apoptosis. In addition, glucose metabolism was evaluated by related kits. Next,cells were subjected to withdrawal from HCC-CM for 2-4 weeks, andalterations in phenotype and glucose metabolism were reevaluatedin hAT-MSCs.Finally, the molecular mechanism was clarified by Western blotting.
Results: The results revealed that after exposure to HCC-CM, hAT-MSCs developed a stellate-shaped morphology. In association with cytoskeleton remodelling, hAT-MSCs showed enhanced capacities for migration and invasion, while cell proliferation was inhibited by regulating the cell cycle by downregulatingcyclins and cyclin-dependent kinases and activating the mitochondrial apoptosis pathway. In terms of glucose metabolism, our results showed mitochondrial dysfunction and elevated glycolysis of hAT-MSCs. However, interestingly, when hAT-MSCs were subjected towithdrawal from HCC-CM, the alterations in phenotype and glucose metabolism could be reversed. Further studies showed that these changes in hAT-MSCs may be regulated bythe ROS/MAPK/HIF-1α signalling pathway.
Conclusion:Taken together, the effects of long-term HCC-CM treatment on phenotype and glucose metabolism in hAT-MSCs are modest and largely reversible after withdrawal. This is the first report on the reversal of phenotype and glucose metabolism in tumour-associated MSCs (TA-MSCs), and it is anticipated that new insights into TA-MSCs will lead to the development of novel strategies for MSC-based anti-tumour therapy.

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6
Loading...