Ed cells by genetic reprogramming technique [8]. They possess the abilities to self-renew and differentiate into Pentagastrin cost different cell types after proper induction [8,9,10]. The major advantage of iPS is that they can be generated from somatic cells. The use of autologous iPS avoids immune rejection after transplantation and the ethical concerns raised by using embryonic stem cells. In recent years, the potential roles of iPS or the hepatocytes that differentiated from iPS in the management of liver injury have recently gained increasing attention [7,11,12].IP-10 in Liver Injury Post iPS TransplantationAlthough previous studies using stem cells in treating liver injuries have shown beneficial effects [13,14,15], the underlying mechanisms for their therapeutic effects have not been completely revealed. One possible explanation is that the transplanted stem cells generate cells function well as normal hepatocytes do. However, the percentage of engraftment and graft survival after cell transplantation remains disappointing [2,16]. Another explanation is the indirect paracrine effects initiated in the damaged liver after stem cell transplant [14,17]. Some soluble factors such as cytokines or chemokines may have been secreted in order to facilitate the process of damage repair and liver regeneration. One of the CXCR3-related chemokines, the interferon-c-inducible protein 10 (IP-10), has been regarded as a marker of inflammatory damage. Besides, IP-10 expression was shown to correlate with the degree of liver 1662274 inflammation, necrosis and fibrosis [18,19,20]. Recently it was found that IP-10 could modulate either positively or negatively the repair and the regeneration process in different forms of liver injuries [21,22,23,24]. Thus, we proposed that IP-10 may have an important 
regulatory role in the cell-base therapy for acute liver injury. At present, it remains unclear whether or not IP10 is involved in and regulates the recovery process of the injured liver after stem cell transplantation. In this study, we induced iPS to differentiate into hepatocytes in vitro. These cells were referred as iPS-derived hepatocyte-like cells (iHL), which functionally resemble primary hepatocytes. Then we investigated the effects of iPS and iHL on acute toxininduced liver injury and explored the possible underlying paracrine-mediated mechanism. Here, we showed that transplanted iPS increased the expression of IP-10 in injured liver to facilitate damage 1516647 repair and promote liver regeneration.percentages of positive cells were highest in iPS group when compared to the control and iHL groups (Fig. 2A). Besides, significant numbers of fluorescent cells were SMER 28 biological activity detected in liver, spleen, lung, and bone marrow by flow-cytometry analysis (Fig. 2B Table S2). The majority of the DiI-labeled iPS was localized in the liver and spleen and the mean percentages were 2.66 and 4.74 , respectively. This implied that the iPS may function in liver through a direct or an indirect route. Additionally, no iPSinduced teratoma was detected in the study mice during a 6month observation period (Fig. S3).IPS Increased Hepatic IP-10 Expression in Injured LiverThe iPS-induced cytokines changes in the liver were evaluated by cytokine array (Fig. 3A). Among all the cytokines tested, IP-10 and MIG were upregulated by 7- and 6-folds in liver tissues respectively. Further study showed that the mRNA expression of IP-10 and MIG significantly increased at 24 h post-injury (Fig. 3B). In contrast, the expr.Ed cells by genetic reprogramming technique [8]. They possess the abilities to self-renew and differentiate into different cell types after proper induction [8,9,10]. The major advantage of iPS is that they can be generated from somatic cells. The use of autologous iPS avoids 
immune rejection after transplantation and the ethical concerns raised by using embryonic stem cells. In recent years, the potential roles of iPS or the hepatocytes that differentiated from iPS in the management of liver injury have recently gained increasing attention [7,11,12].IP-10 in Liver Injury Post iPS TransplantationAlthough previous studies using stem cells in treating liver injuries have shown beneficial effects [13,14,15], the underlying mechanisms for their therapeutic effects have not been completely revealed. One possible explanation is that the transplanted stem cells generate cells function well as normal hepatocytes do. However, the percentage of engraftment and graft survival after cell transplantation remains disappointing [2,16]. Another explanation is the indirect paracrine effects initiated in the damaged liver after stem cell transplant [14,17]. Some soluble factors such as cytokines or chemokines may have been secreted in order to facilitate the process of damage repair and liver regeneration. One of the CXCR3-related chemokines, the interferon-c-inducible protein 10 (IP-10), has been regarded as a marker of inflammatory damage. Besides, IP-10 expression was shown to correlate with the degree of liver 1662274 inflammation, necrosis and fibrosis [18,19,20]. Recently it was found that IP-10 could modulate either positively or negatively the repair and the regeneration process in different forms of liver injuries [21,22,23,24]. Thus, we proposed that IP-10 may have an important regulatory role in the cell-base therapy for acute liver injury. At present, it remains unclear whether or not IP10 is involved in and regulates the recovery process of the injured liver after stem cell transplantation. In this study, we induced iPS to differentiate into hepatocytes in vitro. These cells were referred as iPS-derived hepatocyte-like cells (iHL), which functionally resemble primary hepatocytes. Then we investigated the effects of iPS and iHL on acute toxininduced liver injury and explored the possible underlying paracrine-mediated mechanism. Here, we showed that transplanted iPS increased the expression of IP-10 in injured liver to facilitate damage 1516647 repair and promote liver regeneration.percentages of positive cells were highest in iPS group when compared to the control and iHL groups (Fig. 2A). Besides, significant numbers of fluorescent cells were detected in liver, spleen, lung, and bone marrow by flow-cytometry analysis (Fig. 2B Table S2). The majority of the DiI-labeled iPS was localized in the liver and spleen and the mean percentages were 2.66 and 4.74 , respectively. This implied that the iPS may function in liver through a direct or an indirect route. Additionally, no iPSinduced teratoma was detected in the study mice during a 6month observation period (Fig. S3).IPS Increased Hepatic IP-10 Expression in Injured LiverThe iPS-induced cytokines changes in the liver were evaluated by cytokine array (Fig. 3A). Among all the cytokines tested, IP-10 and MIG were upregulated by 7- and 6-folds in liver tissues respectively. Further study showed that the mRNA expression of IP-10 and MIG significantly increased at 24 h post-injury (Fig. 3B). In contrast, the expr.