Injectable Mesh-Like Conductive Hydrogel Patch for Elimination of Atrial Fibrillation.

Irregular electrical impulses in atrium are the leading cause of atrial fibrillation (AF), resulting in fatal arrhythmia and sudden cardiac death. Traditional medication and physical therapies are widely used, but generally suffer problems in serious physical damage and high surgical risks. Flexible and soft implants have great potential to be a novel approach for heart diseases therapy. A conductive hydrogel-based mesh cardiac patch is developed for application in AF elimination. The designed mesh patch with rhombic-shaped structure exhibits excellent flexibility, surface conformability, and deformation compliance, making it fit well with heart surface and accommodate to the deformation during heart beating. Moreover, the mechanical elastic and shape-memory properties of the mesh patch enable a minimally invasive injection of the patch into living animals. The mesh patch is implanted on the atrium surface for one month, indicating good biocompatibility and stability. Furthermore, the conductive patch can effectively eliminate AF owing to the conductivity and high charge storage capability (CSC) of the hydrogel. The proposed scheme of cardiac bioelectric signal modulation using conductive hydrogel brings new possibility for the treatment of arrhythmia diseases.

Black Phosphorus Flake-Enabled Wireless Neuromodulation for Epilepsy Treatment.

Epilepsy is a prevalent and severe neurological disorder and generally requires prolonged electrode implantation and tether brain stimulation in refractory cases. However, implants may cause potential chronic immune inflammation and permanent tissue damage due to material property mismatches with soft brain tissue. Here, we demonstrated a nanomaterial-enabled near-infrared (NIR) neuromodulation approach to provide nongenetic and nonimplantable therapeutic benefits in epilepsy mouse models. Our study showed that crystal-exfoliated photothermal black phosphorus (BP) flakes could enhance neural activity by altering the membrane capacitive currents in hippocampus neurons through NIR photothermal neuromodulation. Optical stimulation facilitated by BP flakes in hippocampal slices evoked action potentials with a high spatiotemporal resolution. Furthermore, BP flake-enabled NIR neuromodulation of hippocampus neural circuits can suppress epileptic signals in epilepsy model mice with minimal invasiveness and high biocompatibility. Consequently, nanomaterial-enabled NIR neuromodulation may open up opportunities for nonimplantable optical therapy of epilepsy in nontransgenic organisms.

Cytotoxic depsidones and xanthones from Garcinia esculenta Y. H. Li.

Six new compounds, including two depsidones garciculendepsidones A and B (1 and 2), one prenylated xanthone garciculenxanthone (3) and three dimeric xanthones bigarciculenxanthones A-C (4-6), were isolated from the twigs and leaves of Garcinia esculenta Y. H. Li. Their structures were elucidated based on comprehensive analyses of spectral data, including HRESIMS, 1D and 2D NMR, and ECD calculation. All the isolates were tested for their cytotoxicity against five human cancer cell lines (myeloid leukemia HL-60, lung cancer A-549 cells, hepatocellular carcinoma SMMC-7721, breast cancer MDA-MB-231 and colon cancer SW480), among them, compounds 3-5 displayed cytotoxic potential, especially garciculenxanthone (3) had the lowest IC50 value of 8.2 µm for lung cancer A-549 cells.

Efficacy of Acupoints Dual-Frequency Low-Level Laser Therapy on Knee Osteoarthritis.

BACKGROUND: Knee osteoarthritis (OA) presented with knee pain and limitation of mobility is common, and it may become a chronic problem resulting in major loss of function, with related impaired activity of daily living. Current traditional therapy for knee OA includes pharmacological treatment and physiotherapy, but the efficacies are limited. An alternative noninvasive treatment low-level laser therapy (LLLT) applied to acupoints is still contradictory and the efficacy needs to be assessed. METHODS AND MATERIALS: We conduct the randomized double-blind control study to investigate the efficacy of a dual-frequency LLLT (combines red light (780 nm) and near-infrared light (830 nm)) in patients suffering knee OA. Participates were randomly assigned into active laser therapy (ALT) and placebo laser therapy (PLT) groups. Subjects in the ALT group were separately treated by laser apparatus at the three acupoints (SP9, SP10, and EX-LE2) on their knee joints under continuous radiation for 15 min at the maximum intensity, three times per week for four weeks. The PLT group used laser apparatus of the same model according to similar procedures without laser light emission. Outcome Measurements including visual analog scale (VAS), pain pressure threshold (PPT), and Lequesne index were used. RESULTS: A total of 30 subjects with two-sided knee OA in both groups completed the experiment. Statistically significant decreases were observed in the Lequesne index (5.27 ± 3.26 vs. 10.83 ± 3.83), conscious VAS 4 weeks after treatment (moving: 2.87 ± 1.13 vs. 5.67 ± 1.72; resting: 0.33 ± 0.62 vs. 2.67 ± 1.29), and the increase was noted in PPT (21.23 ± 1.82 kg vs. 13.02 ± 1.46 kg) in the ALT group compared with the PLT group. CONCLUSION: It appears that the knee OA pain and disability can be decreased after a dual-frequency LLLT applied to acupoints (SP9, SP10, and EX-LE2). The clinical efficacy of LLLT is highly related to the therapeutic settings of the laser apparatus; hence, more clinical trials with diffident parameter settings are needed to be further clarified.

Intestinal morphology, immunity and microbiota response to dietary fibers in largemouth bass, Micropterus salmoide.

This study is aimed at identifying the effects of dietary fiber on gut health, as well as the association between that understanding and fiber consumption in fish. A total of 300 juvenile largemouth bass (micropterus salmoides, initial average weight: 15.38 ± 0.16g) were randomly divided into three treatment groups (4 replicates per group). Fish were fed with isoproteic and isolipidic diets containing 0% (low fiber, LF), 4% (moderate fiber, MF) and 8% (high fiber, HF) soybean fiber, respectively. The intestine and intestinal content of test fish per treatment group after 56 days of treatment were sampled. The results showed that the anterior intestinal sections had normal histological architecture, and no considerable damage or inflammation was observed in any histological section from all subjects examined. Curiously, fish fed the MF diet had better histological alterations than the other treatments. Meanwhile, the intestinal antioxidant capacity in the MF group was significantly promoted when compared to the other groups, as well as up-regulated expression of antioxidant-related genes including sod, cat and gpx with increasing dietary fiber concentrations. Importantly, the administrations of MF diet remarkably elevated largemouth bass innate immune parameters include intestinal inducible nitric oxide synthase (iNOS) activity, nitric oxide (NO) and total protein content. Similarly, dietary administrations of fiber down-regulated notablely the expression of pro-inflammatory cytokines including IL-8, IL-1ß and TNFα, whereas up-regulated tolerogenic cytokine IL-10 and TGF-ß1 mRNA levels. In addition, dietary fibers also modulated the community structure of the intestinal microbiota by significantly altering bacterial diversity. Dietary supplemental fibers regulated intestinal microbiota in largemouth bass, characterized by a reduced abundance of Fusobacteria along with increased abundances of Proteobacteria and Firmicutes. Taken together, the present results suggested that moderate fiber supplementation was beneficial to promoting intestinal health status of fish through antioxidant and anti-inflammatory effects, which could be at least partially responsible by the modulation of gut microbial composition.

Transcriptomic analysis in Anemone flaccida rhizomes reveals ancillary pathway for triterpene saponins biosynthesis and differential responsiveness to phytohormones.

Anemone flaccida Fr. Schmidt is a perennial medicinal herb that contains pentacyclic triterpenoid saponins as the major bioactive constituents. In China, the rhizomes are used as treatments for a variety of ailments including arthritis. However, yields of the saponins are low, and little is known about the plant's genetic background or phytohormonal responsiveness. Using one-quarter of the 454 pyrosequencing information from the Roche GS FLX Titanium platform, we performed a transcriptomic analysis to identify 157 genes putatively encoding 26 enzymes involved in the synthesis of the bioactive compounds. It was revealed that there are two biosynthetic pathways of triterpene saponins in A. flaccida. One pathway depends on ß-amyrin synthase and is similar to that found in other plants. The second, subsidiary ("backburner") pathway is catalyzed by camelliol C synthase and yields ß-amyrin as minor byproduct. Both pathways used cytochrome P450-dependent monooxygenases (CYPs) and family 1 uridine diphosphate glycosyltransferases (UGTs) to modify the triterpenoid backbone. The expression of CYPs and UGTs were quite different in roots treated with the phytohormones methyl jasmonate, salicylic acid and indole-3-acetic acid. This study provides the first large-scale transcriptional dataset for the biosynthetic pathways of triterpene saponins and their phytohormonal responsiveness in the genus Anemone.

Fisetin and polymeric micelles encapsulating fisetin exhibit potent cytotoxic effects towards ovarian cancer cells.

BACKGROUND: The anti-tumor activities of Natural compounds and their derivatives are of great interest to pharmaceutical industries. Fisetin is one of prospective natural compounds in this regard but unfortunately with poor hydrophilicity. METHODS: The effects of unmodified and modified fisetin in cultured ovarian cancer cells were compared by transmission electronmicroscopy to determine apoptotic bodies, MTT assay to quantitate cell numbers, and fluorescence activated cell sorting analyse of various markers to determine the apoptotic state. In addition, the efficacy of fisetin and fisetin-micelles in vivo was determined by using immunocompromised mice. Apoptosis was measured by established markers using both western blot analysis and immunochemistry. Angiogenesis in a xenograft mouse model carring SKOV3 cells was evaluated by color Doppler ultrasound and immunohistochemistry. RESULT: Multiple lines of evidence indicated that fisetin and fisetin micelles induce apoptosis in ovarian cancer cells in a dose-dependent manner. Histological analysis, terminal deoxynucleotidyltransferase-mediated nick-end labeling assay, western blot, immunohistochemical detection and microvessel density detection demonstrated that fisetin and fisetin micelles induced increased tumor apoptosis, proliferation suppression and antiangiogenesis activities. CONCLUSION: As far as we know, the present study is the first time to demonstrate the potency of both fisetin and fisetin micelles inducing apoptosis in ovarian cancer cells. Further studies will be needed to validate the therapeutic potential of fisetin and fisetin micelles in ovarian cancer treatment.

Systematic Review on Effects of Acupuncture Combined with Lifestyle Modification on Essential Hypertension / 中国中医药信息杂志

Objective To evaluate the effects of acupuncture combined with lifestyle modification for essential hypertension by Meta-analysis. Methods Clinical randomized controlled trial literature about acupuncture combined with lifestyle modification for essential hypertension in CNKI, WanFang Data, CBM, VIP, PubMed, Embase, and Web of Science since establishment to February 20, 2017 were retrieved. Data extraction and quality assessment of studies were conducted by two researchers independently, and the Meta-analysis was performed by the software of RevMan5.3. Results 5 articles involving 467 patients were included. The results of Meta-analysis showed that acupuncture combined with lifestyle modification had more significant effect than lifestyle modification alone in lowing SBP [SMD=-1.52(-2.40,-0.64)], in lowing DBP [SMD=-1.02(-2.01,-0.03)], total effective rates [RR=1.27(1.13, 1.43)]. Conclusion Compared with lifestyle modification alone, acupuncture combined with lifestyle modification have significant effects for patients with essential hypertension, but because of the fewer studies included, bigger heterogeneity between studies and the lower quality of included studies still exist, the results should be further verified, and clinical applications should be treated with caution.

Research & development and evaluation of oral films / 中国中药杂志

Oral film is a new type of oral preparation. Due to portability, simple preparation process and good clinical compliance, oral films have become the focus of novel drug delivery system in recent years. Meanwhile, oral films have been gradually used in the development of Chinese medicine preparations. According to the application and approval situation of different types of oral films both at home and abroad in recent years, their research and development status was analyzed, including the basic concept, formulation, manufacturing process and quality control, as well as related progress and development prospects of oral films applied in traditional Chinese medicine. Some suggestions on the technical evaluation of oral films were put forward by considering specific requirements from regulatory agencies. This paper could provide some references for the development and evaluation of oral films. Due to the complexity of the drug substances and the particularity of the drug product, the development and application of oral films in traditional Chinese medicine are still faced with opportunity and challenges.

Effects of Traditional Chinese Medicine Shensong Yangxin Capsules on Heart Rhythm and Function in Congestive Heart Failure Patients with Frequent Ventricular Premature Complexes: A Randomized, Double-blind, Multicenter Clinical Trial / 中华医学杂志(英文版)

<p><b>BACKGROUND</b>Pharmacological therapy for congestive heart failure (CHF) with ventricular arrhythmia is limited. In the study, our aim was to evaluate the effects of Chinese traditional medicine Shensong Yangxin capsules (SSYX) on heart rhythm and function in CHF patients with frequent ventricular premature complexes (VPCs).</p><p><b>METHODS</b>This double-blind, placebo-controlled, multicenter study randomized 465 CHF patients with frequent VPCs to the SSYX (n = 232) and placebo groups (n = 233) for 12 weeks of treatment. The primary endpoint was the VPCs monitored by a 24-h ambulatory electrocardiogram. The secondary endpoints included the left ventricular ejection fraction (LVEF), left ventricular end-diastolic diameter, N-terminal pro-brain natriuretic peptide (NT-proBNP), New York Heart Association (NYHA) classification, 6-min walking distance (6MWD), Minnesota Living with Heart Failure Questionnaire (MLHFQ) scores, and composite cardiac events (CCEs).</p><p><b>RESULTS</b>The clinical characteristics were similar at baseline. SSYX caused a significantly greater decline in the total number of VPCs than the placebo did (-2145 ± 2848 vs. -841 ± 3411, P < 0.05). The secondary endpoints of the LVEF, NYHA classification, NT-proBNP, 6MWD, and MLHFQ scores showed a greater improvements in the SSYX group than in the placebo group (ΔLVEF at 12th week: 4.75 ± 7.13 vs. 3.30 ± 6.53; NYHA improvement rate at the 8th and 12th week: 32.6% vs. 21.8%, 40.5% vs. 25.7%; mean level of NT-proBNP in patients with NT-proBNP ≥125 pg/ml at 12th week: -122 [Q1, Q3: -524, 0] vs. -75 [Q1, Q3: -245, 0]; Δ6MWD at 12th week: 35.1 ± 38.6 vs. 17.2 ± 45.6; ΔMLHFQ at the 4th, 8th, and 12th week: -4.24 ± 6.15 vs. -2.31 ± 6.96, -8.19 ± 8.41 vs. -3.25 ± 9.40, -10.60 ± 9.41 vs. -4.83 ± 11.23, all P < 0.05). CCEs were not different between the groups during the study period.</p><p><b>CONCLUSIONS</b>In this 12-week pilot study, SSYX was demonstrated to have the benefits of VPCs suppression and cardiac function improvement with good compliance on a background of standard treatment for CHF.</p><p><b>TRIAL REGISTRATION</b>www.chictr.org.cn, ChiCTR-TRC-12002061 (http://www.chictr.org.cn/showproj.aspx?proj=7487) and Clinicaltrials.gov, NCT01612260 (https://clinicaltrials.gov/ct2/show/NCT01612260).</p>

Affinity capture using peptide-functionalized magnetic nanoparticles to target Staphylococcus aureus.

Staphylococcus aureus, a commonly found pathogen, can cause food poisoning and infections. Thus, it is necessary to develop analytical methods for the rapid screening of S. aureus in suspicious samples. Magnetic nanoparticles (MNPs) are widely used as affinity probes to selectively enrich target species from complex samples because of their high specific surface area and magnetic properties. The MNP surface should be functionalized to have the capability to target specific species. We herein propose a straightforward method to functionalize aluminum oxide-coated iron oxide (Fe3O4@Al2O3) MNPs with the peptide HHHHHHDEEGLFVD (D). The peptide D was comprised of three domains: polyhistidine (H6) used as the linker, DEE added as the spacer, and GLFVD used for targeting S. aureus. D was immobilized on the surface of Fe3O4@Al2O3 MNPs through H6-Al chelation. Our results showed that the D-functionalized Fe3O4@Al2O3 MNPs (D-Fe3O4 MNPs) possess the capability to target S. aureus. The selective trapping experiments were conducted under microwave-heating for only 60 s, and sufficient bacterial cells were trapped by the MNPs to be identified by matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS). We demonstrated that the D-Fe3O4@Al2O3 MNPs combined with MALDI-MS can be used to rapidly characterize trace amounts of S. aureus in complex juice and egg samples.

[Progress and perspective of silkworm as a model of human diseases for drug screening].

As a typical representative of Lepidopteran insects, the silkworm, Bombyx mori, has numerous advantages, such as simple husbandry,highly prolific nature, short generation time, easily handled to be operated with moderate body size, clear genetic background and abundant mutation resources. Silkworm has not only been studied by the geneticists, but also been used as a new laboratory animal model of human disease and drug screening. There is a plenty of genetic resources in silkworm, some of which could be used as models of human genetic diseases, such as Phenylketonuria, Parkinson's disease, Hermansky-Pudlak syndrome and so on. Silkworm has also played a significant role in the study of pathogenesis of human pathogenic microorganisms. Moreover, silkworm could be used to evaluate the pharmacokinetic/pharmacodynamics properties and safety of a new drug comprehensively and systematically. At the same time, it can be used in the high throughput drug screening assays to shorten the period of the new drug research and development. This review summarizes that the silkworm is an excellent model in the drug screening assays, and has a potential in application to the large-scale drug screening.

Prevention of postsurgical atrial tachycardia with a modified right atrial free wall incision.

BACKGROUND: Most postsurgical macroreentry atrial tachycardias (PS-MATs) are atriotomy related; however, underlying mechanisms and prevention remain undefined. OBJECTIVE: The purpose of the present study was to investigate the electrophysiological and histologic bases of right atriotomy incision arrhythmogenicity and whether a modified atriotomy that extends the incisional line to the tricuspid annulus (TA) and inferior vena cava (IVC) prevents PS-MAT. METHODS: Atrial arrhythmia induction and electrophysiological and histologic characteristics were studied 8 weeks after right atriotomy in 30 adult swine according to incision distance to TA or IVC (groups A, B, and C: broad, narrow, and closed corridors, respectively; group D, no-incision sham; n = 6 per group, except n = 12 for group B). RESULTS: Sustained PS-MATs were induced and mapped in the broad- and narrow-corridor groups (A, 1 of 6 [16.7%] vs B, 5 of 12 [41.7%]) but not in the closed-corridor (C) or sham (D) groups (P = .087). With 20-ms pacing cycle-length decrements (from 350 to 270 ms), mean conduction time over 20 mm at the atriotomy-to-TA corridor was 29.2 ± 2.2, 31.0 ± 4.2, 26.0 ± 1.9, and 17.0 ± 1.4 ms for 5 and 10 mm (both group B), 15 mm (group A), and sham incision (P = .017), respectively. Conduction properties correlated with histologic findings: the wider the corridor, the healthier its tissue. In group C (modified atriotomy), both corridors were replaced by dense scar with complete conduction block. CONCLUSION: Atriotomy corridor width determines conduction properties and contributes to arrhythmogenicity. A modified right atriotomy that extends to the TA and IVC prevents PS-MAT.

Oriented mesoporous nanopyramids as versatile plasmon-enhanced interfaces.

We developed a facile interfacial oriented growth and self-assembly process to fabricate three-dimensional (3D) aligned mesoporous iron oxide nanopyramid arrays (NPAs). The unique NPAs possess a 3D mesostructure with multiple features, including high surface area (~175 m(2)/g), large pore size (~20 nm), excellent flexibility (bent over 150 times), and scalability at the foot scale for practical applications. More importantly, these NPAs structures enable versatile enhancement of localized surface plasmon resonance and photoelectrochemical conversion. The integration of plasmonic gold with 3D NPAs remarkably improves the performance of photoelectrochemical conversion, leading to ~6- and 83-fold increases of the photocurrent under simulated solar and visible-light illumination, respectively. The fabrication and investigation of NPAs provide a new paradigm for preparing unconventional mesoporous oriented thin films and further suggest a new strategy for designing plasmonic metal/semiconductor systems for effective solar energy harvesting.

Bioactive responses of Hep-G2 cells to soyasaponin extracts differs with respect to extraction conditions.

Soyasaponins are bioactive oleanane triterpenoids found in soy and other legumes. The effect of two methanolic extractions of soy flour, room temperature (RT) and reflux (RE) extractions on composition and bioactive properties in hepatocarcinoma cells (Hep-G2) were investigated. A greater amount of 2,3-dihydro-2,5-dihydroxy-6-methyl-4H-pyran-4-one (DDMP) conjugated soyasaponins betag was measured in RT and a greater amount of the structurally related non-DDMP soyasaponins I and III were detected in RE. MTT cell viability yielded an LC50 of 0.926+/-0.08 mg/mL for RT and 0.546+/-0.06 mg/mL for RE. ViaCount viability assay showed similar results for RE as the MTT assay however, RT treatment produced no difference compared with the control. Analysis using TUNEL and cell cycle analysis revealed that RE treatment induced apoptosis and flow cytometry forward side scatter and morphological assessment of RT showed evidence of Hep-G2 differentiation after 72 h. Differences in the bioactivities may be attributed to the different concentration of DDMP conjugated soyasaponin betag recovered in RT and RE extracts.

[Studies on chemical constituents of Valeriana officinalis].

From Valeriana officinalis L., 4 compounds were isolated and identified by various spectral analysis and chemical conversion, as valerenic acid, beta-sitosterol, ursolic acid, 4, 4', 8, 8'-tetrahydroxy-3, 3'-dimethoxyl-dibenzyl-ditetrahydrofuran and caryophyllene acide,valerane, naphthalene, linoleic acid, ethyl ester, myrtenyl acetate were identified by GC-MS. Ursolic acid and 4, 4', 8, 8'-tetrahydroxy-3, 3'-dimethoxyl-dibenzyl-ditetrahydrofuran were discovered in this plant for the first time.

Effects of 2-n-nonyl-1,3-dioxolane as an enhanceron transdermal absorption of Salvia miltiorrhiza gel / 中国中药杂志

<p><b>OBJECTIVE</b>To choose the most suitable concentration of 2-n-nonyl-1,3-dioxolane as a penetration enhancer in tanshinone gel preparation.</p><p><b>METHOD</b>In vitro, transdermal absorption was studied using improved Frans equipment and rats skin. Tanshinone II A was tested by HPLC.</p><p><b>RESULT</b>The 4.0% concentration of 2-n-nonyl-1,3-dioxolane enhanced the transdermal absorption significantly in the preparation.</p><p><b>CONCLUSION</b>2-n-nonyl-1,3-dioxolane was a new effective permeaton enhancer.</p>

Image-guided and intensity-modulated radiosurgery for patients with spinal metastasis.

BACKGROUND: Radiosurgery can deliver a single, large radiation dose to a localized tumor using a stereotactic approach and hence, requires accurate and precise delivery of radiation to the target. Of the extracranial organ targets, the spine is considered a suitable site for radiosurgery, because there is minimal or no breathing-related organ movement. The authors studied spinal radiosurgery in patients with spinal metastases to determine its accuracy and precision. METHODS: The spinal radiosurgery program was based on an image-guided and intensity-modulated, shaped-beam radiosurgical unit. It is equipped with micromultileaf collimators for beam shaping and radiation intensity modulation and with a noninvasive, frameless positioning device that uses infrared, passive marker technology together with corroborative image fusion of the digitally reconstructed image from computed tomography (CT) simulation and orthogonal X-ray imagery at the treatment position. These images were compared with the port films that were taken at the time of treatment to determine the accuracy of the isocenter position. Clinical feasibility was tested in 10 patients who had spinal metastasis with or without spinal cord compression. The patients were treated with fractionated external beam radiotherapy followed by single-dose radiosurgery as a boost (6-8 grays) to the most involved portion of the spine or to the site of spinal cord compression. RESULTS: The accuracy for the isocenter was within 1.36 mm +/- 0.11 mm, as measured by image fusion of the digitally reconstructed image from CT simulation and the port film. Clinically, the majority of patients had prompt pain relief within 2-4 weeks of treatment. Complete and partial recovery of motor function also was achieved in patients with spinal cord compression. The radiation dose to the spinal cord was minimal. The maximum dose of radiation to the anterior edge of the spinal cord within a transverse section, on average, was 50% of the prescribed dose. There was no acute radiation toxicity detected clinically during the mean follow-up of 6 months. CONCLUSIONS: Image-guided, shaped-beam spinal radiosurgery is accurate and precise. Rapid clinical improvement of pain and neurologic function also may be achieved. The results indicate the potential of spinal radiosurgery in the treatment of patients with spinal metastasis, especially those with solitary sites of spine involvement, to increase the prospects of long-term palliation.

Effect of human calcyclin binding protein encoding gene on development of multiple drug resistance in gastric cancer / 中华肿瘤杂志

<p><b>OBJECTIVE</b>To study the effect of human calcyclin binding protein (CacyBP) encoding gene on the development of multiple drug resistance in gastric cancer.</p><p><b>METHODS</b>hCacyBP sense nucleic acid eukaryotic expression vector (pcDNA3.1/hCacyBP +) was constructed and then transfected steadily into the gastric cancer drug sensitive cell (SGC7901) mediated by lipofectamine ( trade mark ) 2000. RT-PCR was used to measure the CacyBP mRNA expression level. MTT was used to measure the adriamycin (ADR) drug sensitivity of SGC7901 and SGC7901 after transfection. FCM was used to measure the average ADR accumulation concentration and cell cycle of SGC7901 and SGC7901 after transfection.</p><p><b>RESULTS</b>The hCacyBP mRNA expression level of SGC7901 transfected with pcDNA3.1/hCacyBP + was higher than SGC7901 transfected with pcDNA3.1 or SGC7901, with the higher survival rate in the former. The average ADR accumulation concentration in SGC7901 and SGC7901 transfected with pcDNA3.1 or pcDNA3.1/hCacyBP + was 5.64, 5.49 and 5.17, respectively. The G(1) phase cell proportion of SGC7901 transfected with pcDNA3.1/hCacyBP + or pcDNA3.1 was reduced slightly but G(2) and S phases increased slightly as compared with SGC7901.</p><p><b>CONCLUSION</b>Calcyclin binding protein may play a certain role in gastric cancer drug resistance.</p>