Objective To study the association between mean platelet volume(MPV),platelet distribution width(PDW)and procalcitonin(PCT)and cardiac function in patients with pulmonary hypertension(PH)and their diagnostic value on heart failure.Methods 103 patients with PH(PH group)in the 3rd People's Hospital of Chengdu from October 2021 to October 2022 and 103 healthy subjects with physical examination(control group)were selected as study subjects.Fasting peripheral venous blood was collected on the 1st day of admission and MPV,PDW and PCT were detected.The left ventricular ejection fraction(LVEF)was measured and the cardiac function was evaluated by New York Heart Association(NYHA)grading criteria.The patients with PH were divided into failure group and non-failure group according to the diagnosis results of heart failure.The relations of MPV,PDW and PCT with cardiac function in patients with PH and the diagnostic value on heart failure were analyzed.Results The levels of MPV,PDW,and PCT were all higher in the experimental group compared to the control group,while the LVEF was lower,and these differences were statistically significant(P<0.05);as the NYHA classification increased,the levels of MPV,PDW,and PCT showed an increasing trend,while LVEF showed a decreasing trend,and the differences between the groups were statistically significant(P<0.05);in the heart failure group n = 65,the levels of MPV,PDW,and PCT were higher compared to the non-heart failure group n = 38,while LVEF was lower,and these differences were statistically significant(P<0.05).The levels of MPV,PDW,and PCT werr signifi-cantly positively correlated with NYHA functional classification and LVEF(P<0.05).The levels of MPV,PDW,and PCT had good reference value for the diagnosis of heart failure in PH patients,with AUC values of 0.816,0.897,and 0.825 respectively,and the combined diagnostic AUC is 0.952,which wass statistically different from the application of the three indicators alone(P<0.05).Conclusion RDW,PDW and PCT are closely related to cardiac function in patients with PH,and can provide reference information for diagnosis and treatment of heart failure in patients with PH.

Liver diseases cannot be easily detected in the early stage， and although invasive diagnostic methods， such as liver biopsy， are relatively accurate， they tend to have a low degree of acceptance， which greatly limits the improvement in diagnosis and treatment techniques for liver diseases. Therefore， it is of great importance to search for new biomarkers and therapeutic targets. As an emerging biomarker for liquid biopsy， tRNA-derived small RNA （tsRNA） is abnormally expressed in various liver diseases including viral hepatitis， fatty liver disease， liver injury， and liver cancer， and it can affect the development and progression of liver diseases by regulating the biological functions such as gene expression， epigenetic regulation， and protein translation. This article reviews the origin， classification， and biological function of tsRNA， as well as the research advances in tsRNA as biomarkers and potential therapeutic targets for liver diseases， so as to provide ideas for the early diagnosis and treatment of liver diseases.

Dopamine D₃ receptor (D₃R) is implicated in multiple psychotic symptoms. Increasing the D₃R selectivity over dopamine D₂ receptor (D₂R) would facilitate the antipsychotic treatments. Herein, novel carbazole and tetrahydro-carboline derivatives were reported as D₃R selective ligands. Through a structure-based virtual screen, ZLG-25 (D₃R K_i = 685 nmol/L; D₂R K_i > 10,000 nmol/L) was identified as a novel D₃R selective bitopic ligand with a carbazole scaffold. Scaffolds hopping led to the discovery of novel D₃R-selective analogs with tetrahydro-β-carboline or tetrahydro-γ-carboline core. Further functional studies showed that most derivatives acted as hD₃R-selective antagonists. Several lead compounds could dose-dependently inhibit the MK-801-induced hyperactivity. Additional investigation revealed that 23j and 36b could decrease the apomorphine-induced climbing without cataleptic reaction. Furthermore, 36b demonstrated unusual antidepressant-like activity in the forced swimming tests and the tail suspension tests, and alleviated the MK-801-induced disruption of novel object recognition in mice. Additionally, preliminary studies confirmed the favorable PK/PD profiles, no weight gain and limited serum prolactin levels in mice. These results revealed that 36b provided potential opportunities to new antipsychotic drugs with the multiple antipsychotic-like properties.