[Preparation process of rutacarpine-hydroxypropyl-beta-cyclodextrin inclusion complex].

Rutaecarpine (Rut) is a type of indole quinazoline alkaloid exracted from Ruticarpum. Studies showed that Rut has a wide range of pharmacological effects, such as anti-hypertension, anticancer, anti-inflammation, anti-thrombus formation. Currently, many scholars are committed to developing it into a new antihypertensive and anti-inflammatory drug with all new mechanisms. But studies found that Rut is a highly fat-soluble drug with low water and oil solubility. Its high insolubility is the main obstacle in its oral absorption and application, which greatly reduced its bioavailability. Therefore, hydroxypropyl-beta-cyclodextrin (HP-beta-CD) was used as the inclusion material to prepare Rut-HP-beta-CD inclusion complex in this experiment, in order to increase its water solubility and bioavailability. In this experiment, the inclusion complex was prepared by the stirring-freeze-dry method. The preparation process was optimized by the orthogonal test, with the inclusion rate as the index, and molar ratio between host and guest molecules, inclusion temperature, time and stirring speed as the impacting factors. Moreover, the inclusion complex was verified by detecting the apparent solubility, thin layer chromatography, microscopic identification, melting point detection and dissolution study. The results showed that under the conditions of the molar ratio between Rut and HP-beta-CD of 1: 1, temperature at 60 degrees C, inclusion time of 4h and stirring speed at 600 r x min(-1), the inclusion rate of Rut-HP-beta-CD reached 91.04%. Therefore, the preparation process of Rut-HP-beta-CD inclusion under the optimum conditions is simple and feasible, with a highest inclusion rate and reproducibility, and could significantly improve Rut's solubility and bioavailability, and provide a reliable experimental basis for its clinical application.

Ultrasound-assisted extraction of total phenolic compounds from Inula helenium.

Ultrasound-assisted extraction (UAE) of phenolic compounds from Inula helenium was studied. Effects of ethanol concentration, ultrasonic time, solid-liquid ratio, and number of extractions were investigated. An orthogonal array was constructed to optimize UAE process. The optimized extraction conditions were as follows: ethanol concentration, 30%; solid-liquid ratio, 1 : 20; number of extractions, 2 times; extraction time, 30 min. Under the optimal conditions, the yield of total phenolic compounds and chlorogenic acid was 6.13 ± 0.58 and 1.32 ± 0.17 mg/g, respectively. The results showed that high amounts of phenolic compounds can be extracted from I. helenium by ultrasound-assisted extraction technology.

[Inhibition of elicitation of allergic contact dermatitis by topical use of Z-VAD-FMK, a broad caspase inhibitor: experiment in mice].

OBJECTIVE: To explore the effects of N-benzyloxycarbonyl-Val-Ala-Asp-fluoromethylketone (Z-VAD-FMK), a broad caspase inhibitor, on the elicitation of murine allergic contact dermatitis (ACD) and examine the effects on T lymphocytes. METHODS: 1-fluoro-2,4-dinitrobenzene (DNFB) was used to establish the classical murine model of ACD. Different concentrations of Z-VAD-FMK were applied before ear provocation. Several parameters were detected, including ear swelling degree, weight differences and thickness of ear tissue under microscope between 2 ears. Enzyme-linked immunosorbent assay (ELISA) was used to detect the levels of Th1 cytokines (INF-γ and IL-2) in ear tissues. Real-time reverse transcription-polymerase chain reaction (RT-PCR) was used to detect their levels of mRNA and the results were shown as "copies relative to one million housekeeping genes". Local lymph node assay (LLNA) was conducted. Bromodeoxyuridine-flow cytometry was used to detect the proliferation of T lymphocytes in local lymph node and flow cytometry to detect the activation of T lymphocytes. RESULTS: The right ear swelling degree, weight differences and thickness between two ears in the 1.25 mmol/L Z-VAD-FMK group were (12.6 ± 1.2)×10(-2) mm, (3.1 ± 0.2) mg, and (12.1 ± 1.1)×10(-2) mm respectively. And they were all significantly lower than those of the negative control group((17.4 ± 1.6)×10(-2) mm, (4.2 ± 0.3) mg, (16.7 ± 1.5)×10(-2) mm;q = 3.25, 2.98, 3.12, all P < 0.05). The levels of INF-γ and IL-2 in the ear skin lesions of 1.25 mmol/L Z-VAD-FMK group were (856 ± 45) and (167 ± 12) pg/ml respectively and they were both significantly lower than those of the negative control group ((1180 ± 58) and (225 ± 16) pg/ml; q = 3.11, 3.14, both P < 0.05). The mRNA levels of the above two cytokines were 152 ± 12 and 96 ± 8 respectively and they were both significantly lower than those of the negative control group (220 ± 15 and 156 ± 11;q = 3.15, 3.42, both P < 0.05). In LLNA, the mean intensity of BrdU in T lymphocytes of 1.25 mmol/L Z-VAD-FMK-treated group was significantly weaker than that of the negative control group (185 ± 15 vs 298 ± 21, q = 3.02, P < 0.05). The percent of activation markers-positive T lymphocytes of the Z-VAD-FMK group were 7.8% ± 0.7%, 9.8% ± 0.8% and 31.2% ± 2.8% respectively and they were all significantly lower than those of the negative control group (10.5% ± 1.0%, 14.5% ± 1.1%, 46.5% ± 3.2%, q = 3.16, 3.52, 3.11, all P < 0.05). CONCLUSION: Topical use of Z-VAD-FMK prior to ear provocation can suppress the proliferation and activation of T lymphocytes in both skin tissues and local lymph nodes and thus result in the inhibitory effect of allergic contact dermatitis.

Fractional 1320 nm Nd : YAG laser in the treatment of acne vulgaris: a pilot study.

Thirty-five patients with moderate to severe acne were treated with a fractional 1320 nm neodymium : yttrium aluminum garnet (Nd : YAG) laser. These patients received six treatment sessions at a 2-week interval. Inflammatory and non-inflammatory lesions were counted before and after treatment. Fractional 1320 nm Nd : YAG laser therapy was well tolerated, resulting in the reduction of inflammatory lesions by 57% (P<0.05) and the reduction of non-inflammatory lesions by 35% (P<0.05). A significant reduction in the skin sebum level by 30% (P<0.05) was also noted after treatment.

[Attenuation of allergic contact dermatitis by Z-VAD-FMK, a broad caspase inhibitor: experiment with mice].

OBJECTIVE: To investigate the effects of N-benzyloxycarbonyl-Val-Ala-Asp-fluoromethylketone (Z-VAD-FMK), a broad caspase inhibitor, on allergic contact dermatitis (ACD). METHODS: A Balb/c mouse was killed and its back skin was peeled, put into a Franz diffusion cell, and smeared with Z-VAD-FMK. High performance liquid chromatography was used to examine the permeation rate. Dinitro-fluorobenzene (DNFB) was applied on the depilated back of mice as inducer and then on the back-side of right ear as provocative agent 6 days later so as to establish mouse ACD models. Two hours after the provocation 24 mouse models were divided into 4 equal groups to undergo the application of Z-VAD-FMK at the concentration of 0.1, 0.5, 2.5, and 5 mmol/L on the back-side of right ear twice. PBS was applied in the negative control group. Then the mice were killed with their 2 ears cut off. Microscopy was used to measure the right ear swelling degree, and differences in weight and thickness between the 2 ears. ELISA was used to detect the levels of IL-2 and INF-gamma in the ear tissues. RESULTS: The transdermal permeation rates of Z-VAD-FMK at the time points 6, 12, and 24 h were 2.15%, 9.62%, and 12.85% respectively. The right ear swelling degree, and differences in weight and thickness between the 2 ears in the 2.5 mmol/L Z-VAD-FMK group were (12.5 +/- 1.4) x 10(-2) mm, (3.2 +/- 0.3) mg, and (11.8 +/- 1.3) x 10(-2) mm respectively, all significantly lower than those of the negative control group [(19.1 +/- 2.0) x 10(-2) mm, (4.3 +/- 0.4) mg, and (16.8 +/- 1.7) x 10(-2) mm, all P < 0.05]. The IL-2 and INF-gamma levels in the ear skin lesion of the 2.5 mmol/L Z-VAD-FMK group were (148 +/- 10) and (650 +/- 45) pg/ml respectively, both significantly lower than those of the negative control group [(205 +/- 18) and (1030 +/- 58) pg/ml, both P < 0.05]. CONCLUSION: Z-VAD-FMK can permeate through mouse skin and inhibit the activation and proliferation of T lymphocytes, leading to the inhibitory effect of contact allergic reaction.

Network pharmacology exploration reveals endothelial inflammation as a common mechanism for stroke and coronary artery disease treatment of Danhong injection.

Although Danhong injection (DHI) is the most widely prescribed Chinese medicine for both stroke and coronary artery disease (CAD), its underlying common molecular mechanisms remain unclear. An integrated network pharmacology and experimental verification approach was used to decipher common pharmacological mechanisms of DHI on stroke and CAD treatment. A compound-target-disease & function-pathway network was constructed and analyzed, indicating that 37 ingredients derived from DH (Salvia miltiorrhiza Bge., Flos Carthami tinctorii and DHI) modulated 68 common targets shared by stroke and CAD. In-depth network analysis results of the top diseases, functions, pathways and upstream regulators implied that a common underlying mechanism linking DHI's role in stroke and CAD treatment was inflammatory response in the process of atherosclerosis. Experimentally, DHI exerted comprehensive anti-inflammatory effects on LPS, ox-LDL or cholesterol crystal-induced NF-κB, c-jun and p38 activation, as well as IL-1ß, TNF-α, and IL-10 secretion in vascular endothelial cells. Ten of 14 predicted ingredients were verified to have significant anti-inflammatory activities on LPS-induced endothelial inflammation. DHI exerts pharmacological efficacies on both stroke and CAD through multi-ingredient, multi-target, multi-function and multi-pathway mode. Anti-endothelial inflammation therapy serves as a common underlying mechanism. This study provides a new understanding of DHI in clinical application on cardiovascular and cerebrovascular diseases.

Cutaneous lesions and visceral involvement of tuberous sclerosis.

BACKGROUND: Tuberous sclerosis (TS) is an autosomal dominant disorder with a significant range of clinical expressions. The involvement of vital organs, such as the brain, kidney, heart and lung is the main cause of death in patients with TS. The aim of this study is to summarize the characteristic cutaneous features and common extracutaneous involvement of TS, which are helpful to the early detection of visceral involvement. METHODS: The analyzed clinical data from 78 patients with TS included those from detailed history, physical and dermatological examination, cranial computed tomography (CT) and magnetic resonance imaging (MRI), abdominal ultrasonography, chest roentgenography, hand and foot X-ray and ophthalmologic examination. RESULTS: The skin, brain and kidney were involved frequently in TS patients. Hypomelanotic macules were the most common and earliest cutaneous lesions. Their number was more than 3 in 81.5% of the patients. They were followed by facial angiofibromas and Shangreen's patch in a decreasing frequency. Forehead plaque, facial angiofibromas and Shagreen's patch appeared in patients at mean age of 2.6, 6.0 and 8.1 years respectively. Cranial CT showed a high positive rate in TS patients. CONCLUSIONS: Cutaneous features of TS are helpful in the early diagnosis of the disease. Hypomelanotic macules are especially important for patients with epilepsy or babies whose number of hypomelanotic macules is more than 3. Cranial CT is of great value in the diagnosis of TS. The involvement of visceral organs such as the brain and kidney should be examined in TS patients.

Decreased plasma levels of lipoxin A4 in children with autism spectrum disorders.

The aim of this study was to evaluate the plasma levels of lipoxin A4 (LXA4), a mediator involved in the resolution of inflammation in Chinese children with autism spectrum disorders (ASD). From January 2013 to June 2014, a total of 150 children (75 confirmed ASD cases and 75 their age-matched and sex-matched control cases) participated in this study after consent was obtained from their parents. Clinical information was collected. Plasma levels of LXA4 were measured at baseline. The severity of ASD was assessed at admission using the Childhood Autism Rating Scale total score. The results indicated that the mean plasma levels of LXA4 were significantly lower in autistic children compared with the normal children (P<0.0001). There was a significant negative relationship between circulating LXA4 levels and severity of autism evaluated by Childhood Autism Rating Scale scores (P=0.006) after adjustment for the possible covariates. On the basis of the receiver operating characteristic curve, the optimal cutoff value of plasma LXA4 levels as an indicator for an auxiliary diagnosis of ASD was projected to be 81.5 pg/ml, which yielded a sensitivity of 90.7% and a specificity of 76.0%, with the area under the curve at 0.911 (95% confidence interval, 0.867-0.955). These results suggested that autistic children had lower plasma LXA4 levels, suggesting an increased susceptibility to recurring inflammation in these samples.

Photochemotherapy inhibits angiogenesis and induces apoptosis of endothelial cells in vitro.

BACKGROUND: Photochemotherapy has long been used in the treatment of psoriasis; however, its mechanism has not been completely elucidated. Psoriasis is now regarded as an angiogenesis-related disease. Recent studies indicated that the inhibition of angiogenesis by photochemotherapy could be an underlying mechanism. It was found that photochemotherapy can downregulate the expression of angiogenic factors in keratinocytes. However, the direct effect of photochemotherapy on endothelial cells has not been studied. METHODS: In this study, we determined the effect of photochemotherapy on the proliferation of human microvascular endothelial cells through MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide) assay and cell cycle analysis. The migration assay and in vitro tube formation assay were used to investigate the migration properties and tube formation ability of human microvascular endothelial cells after psoralen plus UVA (PUVA) treatment. The apoptosis of endothelial cells elicited by photochemotherapy was also analyzed with fluorescence-activated cell sorting analysis (FACS). RESULTS: UVA (0.8-5.0 J/cm(2)) irradiation with the presence of 8-methoxypsoralen (8-MOP) (300 ng/ml) resulted in a dose-dependent reduction in the cell viabilities of endothelial cells. FACS data showed an accumulation of cells in G0/G1 phase of cell cycle and apoptotic features of cell death after UVA irradiation with psoralen. The migration properties and tube formation ability of endothelial cells were dramatically inhibited by photochemotherapy. CONCLUSION: Our results showed that photochemotherapy inhibits angiogenesis and induces apoptosis of human microvascular endothelial cells in vitro, which may be a possible mechanism of photochemotherapy in the treatment of psoriasis.