Immune cells are formed by the proliferation and differentiation of hematopoietic stem cells in the bone marrow,in-cluding lymphocytes,macrophages,etc,which participate in the immune defense,immune stability and immune monitoring of the body,and are an indispensable basic component of the immune system.Basic helix-loop-helix family member E40(BHLHE40)has been shown to play an important role in adipogenesis,tumorigenesis,circadian rhythm and hypoxia response.Recently,it was found that BHLHE40 plays a key role in the cell cycle,proliferation and cytokine production of immune cells.This article will review the discovery,naming,structure,and mechanism of BHLHE40 in various periods,as well as it's research progress in immune cells,in order to provide new target for the treatment of immune-related diseases at the genetic level.

Immune disorders play a vital role in the tumors,infections and allergic diseases.As a co-inhibitory molecule that has attracted much attention in recent years,programmed cell death protein 1(PD-1)can participate in immunomodulation in various immune diseases by inhibiting the proliferation and activation of type 2 innate lymphoid cells(ILC2s).ILC2s is a newly discovered subgroup of immune cell families,which is involved in tumor immunity,anti-parasitic infection and tissue damage repair by secreting type 2 cytokines.PD-1 is a major immunosuppressive molecule that can regulate the different immunomodulatory effects of ILC2s in different immune diseases.This article reviews the role and mechanism of PD-1 in regulating ILC2s in different diseases.

Immune cells are formed by the proliferation and differentiation of hematopoietic stem cells in the bone marrow,in-cluding lymphocytes,macrophages,etc,which participate in the immune defense,immune stability and immune monitoring of the body,and are an indispensable basic component of the immune system.Basic helix-loop-helix family member E40(BHLHE40)has been shown to play an important role in adipogenesis,tumorigenesis,circadian rhythm and hypoxia response.Recently,it was found that BHLHE40 plays a key role in the cell cycle,proliferation and cytokine production of immune cells.This article will review the discovery,naming,structure,and mechanism of BHLHE40 in various periods,as well as it's research progress in immune cells,in order to provide new target for the treatment of immune-related diseases at the genetic level.

Immune disorders play a vital role in the tumors,infections and allergic diseases.As a co-inhibitory molecule that has attracted much attention in recent years,programmed cell death protein 1(PD-1)can participate in immunomodulation in various immune diseases by inhibiting the proliferation and activation of type 2 innate lymphoid cells(ILC2s).ILC2s is a newly discovered subgroup of immune cell families,which is involved in tumor immunity,anti-parasitic infection and tissue damage repair by secreting type 2 cytokines.PD-1 is a major immunosuppressive molecule that can regulate the different immunomodulatory effects of ILC2s in different immune diseases.This article reviews the role and mechanism of PD-1 in regulating ILC2s in different diseases.

Sepsis is a life-threatening organ dysfunction caused by the imbalance of host immune response to infection,which immune regulation mechanism is complex and has not been clarified.Programmed death receptor-1(PD-1)/programmed death recep-tor ligand-1(PD-L1)is a negative co-inhibitory molecule that has attracted much attention in recent years.Studies have shown that PD-1/PD-L1 signaling pathway plays an important immunosuppressive role in sepsis.There are differences in immune regulation mecha-nisms in heart,liver,spleen,lung and kidney,which has not been clarified.Immune regulation of PD-1/PD-L1 in different organs of sepsis is reviewied in this article,which could to provide a new direction for the study of sepsis.

Objective To establish a Hr mutant knockout mouse model to study the function of Hr gene.Methods Transcription activator-like effector nucleases ( TALENs) technique was used to disrupt the mouse Hr locus,creating heritable mutations that eliminate Hr function to explore the effects of Hr on hair development and provide a good model to study the function of Hr gene.The phenotype of Hr -/- mice was observed after birth and skin histology of the transgenic mice was studied by light microscopy.Results It was shown that a F0 mouse with the 2 -bp deletion in Hr gene ranging from 86 to 87 base pairs was obtained.The male mice with clear deletion of the Hr fragment and with obvious frame shifting were mated with wild-type female mice, and F1 mice were achieved.The heterozygous males mated with females to generate the F2 homozygous mice.The first hair coat of Hr-/- mice developed normally.Beginning from 14 days after birth, however, there was a rapid hair loss.The mices were completely hairless except for a few vibrissae at 30 days. Histologically, two characteristic structures appeared, the utriculus and dermal cyst.Conclusions The results suggest that Hr -/- mice are successfully created using TALENs, and Hr is important for regulating hair development, which could explain at least in part the hair loss and be applied to study the mechanism of hair growth and development disorder.

Objective To investigate the relationship of serum cholinesterase(CHE) level with the severity and prognosis in patients with acute cerebral infarction. Methods A total of 325 patients with acute cerebral infarction were recruited as patients group,and another 101 healthy sub?jects were selected as control group. Velocity method was employed to detect the level of serum CHE. Patients with acute cerebral infarction were then divided into different groups according to the infarcts diameter and the modified Rankin scale(mRS)at 1 year post stroke. The collected data were analyzed statistically. Results The level of serum CHE in small and medium area infarction group was higher than control group(P<0.01);the level of serum CHE in large area infarction group was lower than control group(P<0.01);the level of serum CHE was negatively correlated with infarct size,NIHSS and the mRS score(r=-0.302,-0.232,-0.455,P<0.001). The level of CHE,age,NIHSS and infarcts diameter was identified as independent influence factors for prognosis of acute cerebral infarction. Conclusion Early phase of serum CHE level is closely related with the infarct size and illness severity index in patients with acute cerebral infarction,which could be an independent factor affecting the prognosis of cere?bral infarction.