Hypertrophic scar is a fibrous hyperplastic disorder that arises from skin injuries. The current therapeutic modalities are constrained by the dense and rigid scar tissue which impedes effective drug delivery. Additionally, insufficient autophagic activity in fibroblasts hinders their apoptosis, leading to excessive matrix deposition. Here, we developed an active microneedle (MN) system to overcome these challenges by integrating micromotor-driven drug delivery with autophagy regulation to remodel the scar microenvironment. Specifically, sodium bicarbonate and citric acid were introduced into the MNs as a built-in engine to generate CO₂ bubbles, thereby enabling enhanced lateral and vertical drug diffusion into dense scar tissue. The system concurrently encapsulated curcumin (Cur), an autophagy activator, and triamcinolone acetonide (TA), synergistically inducing fibroblast apoptosis by upregulating autophagic activity. In vitro studies demonstrated that active MNs achieved efficient drug penetration within isolated scar tissue. The rabbit hypertrophic scar model revealed that TA-Cur MNs significantly reduced the scar elevation index, suppressed collagen I and transforming growth factor-β1 (TGF-β1) expression, and elevated LC3 protein levels. These findings highlight the potential of the active MN system as an efficacious platform for autonomous augmented drug delivery and autophagy-targeted therapy in fibrotic disorder treatments.

Objective:To analyze the clinical manifestations and laboratory features in patients with myeloid neoplasms complicated with clonal T large granular lymphocyte (T-LGL) proliferation.Methods:The clinical data of 5 patients with myeloid neoplasms complicated with clonal T-LGL proliferation from November 2017 to November 2018 in Institute of Hematology & Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College were analyzed retrospectively.Results:The median age was 60 years old. All patients had a history of abnormal peripheral blood cell counts for over 6 months. The absolute lymphocyte count in peripheral blood was less than 1.0×10 9/L. In addition to the typical T-LGL phenotype, the immunophenotype was heterogenous including CD4 +CD8 - in 2 patients, the other 3 CD4 -CD8 +. Four patients were αβ type T cells, the other one was γδ type. STAT3 mutation was detected in 1 patient by next-generation sequencing, the other 4 cases were negative. Conclusions:Clonal T-LGL proliferation with myeloid neoplasm develops in an indolent manner, mainly in elderly patients. Hemocytopenia is the most common manifestation. The diagnosis of T-LGL proliferation does not have specific criteria, that it should be differentiated from other T cell proliferative disorders, such as T-cell clones of undetermined significance. STAT3 or STAT5b mutation may help distinguish.

OBJECTIVE:To investigate therapeutic efficacy and safety of Salviae miltiorrhizae and ligustrazine hydrochloride injection in the treatment of vertebro-basilar artery insufficiency(VBI)after cerebral infraction. METHODS:128 patients with VBI after cerebral infraction were divided into observation group and control group according to random number table,with 64 cases in each group. Both group received general treatment. Control group was additionally given Shuxuetong injection 6 ml added into 0.9%Sodium chloride injection 250 ml,ivgtt,qd. Observation group was additionally given Salviae miltiorrhizae and ligustrazine hy-drochloride injection 10 ml into 0.9% Sodium chloride injection 250 ml,ivgtt,qd. Both groups received treatment for consecutive 2 weeks. Clinical efficacies of 2 groups were observed as well as blood lipid,vertebro-basilar artery blood velocity and blood viscosity before and after treatment. The occurrence of ADR was compared between 2 groups. RESULTS:The total effective rate of observa-tion group was 95.31%,which was significantly higher than 79.69% of control group,with statistical significance(P<0.05). Before treatment,there was no statistical significance in blood lipid,vertebro-basilar artery blood velocity and blood viscosity between 2 groups(P>0.05). After treatment,above indexes of 2 groups were improved significantly,and blood lipid and vertebro-basilar ar-tery blood velocity of observation group were significantly better than control group,with statistical significance(P<0.05). No obvi-ous ADR was found in 2 groups. CONCLUSIONS:Salviae miltiorrhizae and ligustrazine hydrochloride injection shows significant therapeutic efficacy for VBI after cerebral infraction,can significantly improve blood lipid,vertebro-basilar artery blood velocity and blood viscosity with good safety.