Human skin self-repairs after trauma and surgery. During this process,the ability of the skin to achieve complete functional regeneration and avoid the formation of fibrosis (scarring) or chronic wounds is a key clinical concern. Studies on wound healing have suggested that several factors affect the process of wound healing,including race,age,wound site,and skin tension. However,the lack of systematic analysis of the complete definition and connotation of skin regeneration and fibrosis,as well as the key links in the regulatory network of wound healing,makes clinical application difficult. In this review,we discuss domestic and international literatures to formu-late the concept of skin regeneration and fibrosis,combine the latest research progress on the physiological and pathological processes of wound healing,and propose the key links of the regulatory network that can potentially affect the outcome of skin wound healing. There-fore,this review provides novel theoretical support for the study of wound healing and suggests innovative diagnostic and therapeutic strat-egies for clinical applications.

Human skin self-repairs after trauma and surgery. During this process,the ability of the skin to achieve complete functional regeneration and avoid the formation of fibrosis (scarring) or chronic wounds is a key clinical concern. Studies on wound healing have suggested that several factors affect the process of wound healing,including race,age,wound site,and skin tension. However,the lack of systematic analysis of the complete definition and connotation of skin regeneration and fibrosis,as well as the key links in the regulatory network of wound healing,makes clinical application difficult. In this review,we discuss domestic and international literatures to formu-late the concept of skin regeneration and fibrosis,combine the latest research progress on the physiological and pathological processes of wound healing,and propose the key links of the regulatory network that can potentially affect the outcome of skin wound healing. There-fore,this review provides novel theoretical support for the study of wound healing and suggests innovative diagnostic and therapeutic strat-egies for clinical applications.

Objective:To investigate the effect and safety of rituximab, programmed death 1 (PD-1) monoclonal antibody, and Bruton tyrosine kinase (BTK) inhibitor on elderly refractory primary central nervous system lymphoma (PCNSL).Methods:The clinical data of an elderly patient with refractory PCNSL treated with the combination of rituximab, PD-1 monoclonal antibody and BTK inhibitor in the First Hospital of Jilin University in February 2020 were retrospectively analyzed. The relevant literature was reviewed.Results:The patient had primary central nervous system diffuse large B-cell lymphoma (high-risk group), and the Memorial Sloan Kettering Cancer Center (MSKCC) score was 2 (estimated overall survival time was 7 months). Disease progressed after 1 course of treatment. Complete remission was achieved after the therapy of rituximab, PD-1 monoclonal antibody combined with BTK inhibitor. PD-1 monoclonal antibody maintenance therapy was performed and patient was followed up until November 17, 2021. The patient's condition was stable. The second progression-free survival (PFS) time was 20 months, and the overall survival time was 21 months. The patient well tolerated the new drug treatment, and no adverse reactions of grade 3 or above occurred.Conclusions:The new targeted combination therapy can be used as a treatment option for elderly PCNSL patients, which can further improve the curative effect and significantly improve the prognosis.

Objective:To explore immune cell reconstitution after allogeneic hematopoietic stem cell transplantation(allo-HSCT)by using mathematical function models.Methods:From June 2011 to May 2015, 65 patients with malignant hematological disorders were retrospectively analyzed. Immune cell frequencies and absolute counts were detected at day 14/28/42 and month 2/3/6/9/12/18/24 post-allo-HSCT. The immune cells included CD3 + T, CD4 + helper T, CD8 + effector T, regulatory T, CD19 + B, CD3 -CD56 + NK and CD3 + CD56 + NKT. Kinetic curve models and mathematical equations were established by utilizing curve model estimation. Results:Cubic curve models were observed for the changes of immune cell frequencies. Except for CD3 + T, CD8 + T and NK cells, the changes of absolute counts of immune cells conformed to cubic curve models. The reconstructed kinetic models of CD8 + T and NK cells after allo-HSCT were associated with relapse. Conclusions:Immune cell reconstitution after allo-HSCT conforms to certain mathematical function curve models. It may provide a new strategy for in-depth studies of immune reconstitution after allo-HSCT.

Objective: To make a postural transfer belt for patients with cervical spinal cord injury, to reduce and prevent the corresponding nursing problems with traditional methods of transfer Methods: 44 patients with cervical spinal cord injury admitted to the ward from January to June 2017 were selected as the control group by traditional methods of postural metastasis, and 48 patients with cervical spinal cord injury admitted to the ward from July to December 2017 were selected as the observation group by using self-made transfer belt. Results: Number of the skin injury caused by transfer in observation group was 0 cases, in control group was four cases, and there was significant difference (χ²=1.91, P=0.049). Falls occur due to metastasis: there were 0 cases in the observation group and five cases in the control group, there was significant difference (χ²=2.39, P=0.026). The number of caregivers in the observation group decreased on average (1.21±0.08), and the number of caregivers in the control group decreased on average (0.86±0.09). The differences between the two groups are statistically significant (t=2.905, P=0.005). The results of the investigation on the escorts in the observation group showed that 46 (95.8%) people believed that the transfer belt was convenient for patients. 47 people believed that the transfer belt was safer and more labor-saving to use, accounting for 97.9%, and 47 people believed that the transfer belt would continue to be used when they went home, who occupied 97.9%. Conclusion The self-made transfer belt is convenient for the caregivers to carry the patients with cervical spinal cord injury, which effectively prevents the occurrence of skin injury, falls and other nursing problems, and improves the quality and experience of the caregivers. This technology is worthwhile to spread.

Objective To explore the effects of intensive therapy program on gross motor function of children with spastic cerebral palsy. Methods Thirty 3-15 year old children with spastic cerebral palsy and level I-III in gross motor function classification system (GMFCS) were randomly divide into 2 groups. The trial group adopted intensive therapy program for treatment, including functional dynamic suit and universal exercise unit combined with functional movement training. The control group adopted core stability training for treatment. Children in two groups took a 1-month training program for 3 hours per day and 5 days per week. The pediatric evaluation of gross motor function measure (GMFM-66) and peabody developmental motor scale (PDMS-2) were administered before and after treatment. Results The scores of GMFM-66 as well as the stationary and locomotion scores of PDMS-2 in both groups showed significant differences within group (P<0.01) after treatment. For the scores of GMFM and PDMS-2 between two groups, no significant differences were found. Conclusions The intensive therapy program can improve the gross motor function of children with spastic cerebral palsy and gain the same effects as core stability training, which can provide a novel and effective intervention for children with cerebral palsy.

Objective To study the immune re-constitution after allogeneic hematopoietic stem cell transplantation (allo-HSCT) in patients with hematological malignancies.Methods From June 2011 to May 2015,65 patients with hematological malignancies were analyzed retrospectively.Lymphocyte subsets were determined by flow cytometry (FCM),including total T lymphocytes (CD3+),helper T cells (CD3+ CD4+),cytotoxic T cells (CD3+ CD8+),CD4/CD8 ratio,nature killer (NK) cells (CD3-CD56+),NKT cells (CD3+ CD56+),B lymphocytes (CD19+),naive T cells (CD3+ HLA-DR+),static T cells (CD3+ HLA-DR-),and regulatory T cells (CD4+ CD25high Foxp3+) on the day 14,28 and 42,and on the month 2,3,6,9,12,15,18 and 24 after allo-HSCT.Results The percentage of CD3+ T cells located normal range after hematological recovery,and its absolute number recovered to normal range at + 15 months.The percentage of CD3+ CD4+ T cells recovered to normal range at + 24 months.However,the absolute number of CD3+ CD4+ T cells did not recover to normal range until 24 months after allo-HSCT.The percentage of CD3+ CD8+ T cells was higher than normal range at + 42 day,and its absolute number was greater than normal range at + 3 months.Hence,low CD4/CD8 ratio was observed for a long period.The re-constitution time points of the percentage and absolute number of CD3+ HLA-DR+ T cells were + 3 months and + 24 months respectively.The re-constitution time points of the percentage and absolute number of CD3 + HLA-DR-T cells were + 2 months and + 15 months respectively.The re-constitution time points of the percentage and absolute number of regulatory T cells were + 12 months and + 15 months respectively.The percentage of NKT cells located in normal range after hematological recovery,and its absolute number retumed to normal range at + 12 months.The re-constitution time points of the percentage and absolute number of B cells were + 9 months and + 18 months respectively.The percentage of NK cells located in normal range after hematological recovery,and its absolute number returned nearly to normal range at + 3 months.Conditioning regimen containing ATG,source of stem cells,CD34+ cell number,GVHD,and CMV reactivation were all associated with immune re-constitution after allo-HSCT.Conclusion Different immune cells showed different re-constitution models after allo-HSCT,and the percentage recovered faster than absolute number for a certain kind of immune cells.Studying immune re-constitution and its associated factors may offer beneficial information for insight into transplantation immunology and improve the management of allo-HSCT.

Objective To explore the long-term outcomes and complications of patients with hematological malignancies (HM) after haploidentical donor transplantation (HDT) or siblingidentical donor transplantation (SDT).Methods From June,2011 to July,2016,89 patients with HM receiving allo-HSCT were retrospectively analyzed,including 57 patients undergoing HDT and 32 cases undergoing SDT.Results The median time to achieve neutrophil engraftment was 2 days shorter after HDT than SDT,whereas that of platelet engraftment was 3 days longer after HDT than SDT.The cumulative incidence for 3 to 4 grade acute graft-versus-host disease (GVHD) was not obviously different between HDT and SDT (8.77％ versus 12.5％ respectively;x2 =0.313,P =0.576).The cumulative incidence for chronic GVHD was not significantly different between HDT and SDT (45.6％ versus 37.5％;~ =0.551,P =0.458).Cytomegalovirus (CMV) reactivity was significantly higher in patients after HDT (77.19％) than those after SDT (21.88％) (x2 =25.633,P＜0.001).The occurrence of hemorrhagic cystitis was also obviously higher in patients after HDT (26.32％)than those after SDT (3.85％) (x2 =5.340,P =0.021).The 1-,2-,and 3-year relapse-free survival rate of patients receiving HDT and SDT was 63.9％,55.4％,44.3％ and 71.2％,58.3％,51.8％,respectively (P =0.541).The 1-,2-,and 3-year overall survival rate of patients receiving HDT and SDT was 75.3％,65.3％,52.3％ and 76.9％,62.9％,62.9％,respectively (P =0.777).Conclusion Considering similar incidence of severe GVHD and long-term outcomes,haploidentical donors should be recommended as a potential alternative donor source when an identical donor is lacking for patients with HM.