Hoehme Stefan, Hammad Seddik, Boettger Jan, Begher-Tibbe Brigitte, Bucur Petru, Vibert Eric, Gebhardt Rolf, Hengstler Jan G, Drasdo Dirk
Interdisciplinary Centre for Bioinformatics (IZBI), University of Leipzig, Haertelstraße 16-18, 04107 Leipzig, Germany.
Institute of Computer Science, University of Leipzig, Haertelstraße 16-18, 04107 Leipzig, Germany.
iScience. 2022 Dec 5;26(1):105714. doi: 10.1016/j.isci.2022.105714. eCollection 2023 Jan 20.
Partial liver removal is an important therapy option for liver cancer. In most patients within a few weeks, the liver is able to fully regenerate. In some patients, however, regeneration fails with often severe consequences. To better understand the control mechanisms of liver regeneration, experiments in mice were performed, guiding the creation of a spatiotemporal 3D model of the regenerating liver. The model represents cells and blood vessels within an entire liver lobe, a macroscopic liver subunit. The model could reproduce the experimental data only if a biomechanical growth control (BGC)-mechanism, inhibiting cell cycle entrance at high compression, was taken into account and predicted that BGC may act as a short-range growth inhibitor minimizing the number of proliferating neighbor cells of a proliferating cell, generating a checkerboard-like proliferation pattern. Model-predicted cell proliferation patterns in pigs and mice were found experimentally. The results underpin the importance of biomechanical aspects in liver growth control.
部分肝切除是肝癌的一种重要治疗选择。在大多数患者中,肝脏能够在几周内完全再生。然而,在一些患者中,肝脏再生失败,往往会产生严重后果。为了更好地理解肝脏再生的控制机制,研究人员在小鼠身上进行了实验,从而构建了一个再生肝脏的时空三维模型。该模型展示了整个肝叶(肝脏的一个宏观亚单位)内的细胞和血管。只有考虑到一种生物力学生长控制(BGC)机制(即在高压力下抑制细胞周期进入),该模型才能重现实验数据,并预测BGC可能作为一种短程生长抑制剂,使增殖细胞的增殖相邻细胞数量最少,从而产生棋盘状的增殖模式。实验发现了猪和小鼠模型预测的细胞增殖模式。这些结果证实了生物力学因素在肝脏生长控制中的重要性。