Geometric Origin of Non-Bloch PT Symmetry Breaking.

The parity-time (PT) symmetry of a non-Hermitian Hamiltonian leads to real (complex) energy spectrum when the non-Hermiticity is below (above) a threshold. Recently, it has been demonstrated that the non-Hermitian skin effect generates a new type of PT symmetry, dubbed the non-Bloch PT symmetry, featuring unique properties such as high sensitivity to the boundary condition. Despite its relevance to a wide range of non-Hermitian lattice systems, a general theory is still lacking for this generic phenomenon even in one spatial dimension. Here, we uncover the geometric mechanism of non-Bloch PT symmetry and its breaking. We find that non-Bloch PT symmetry breaking occurs by the formation of cusps in the generalized Brillouin zone (GBZ). Based on this geometric understanding, we propose an exact formula that efficiently determines the breaking threshold. Moreover, we predict a new type of spectral singularities associated with the symmetry breaking, dubbed non-Bloch van Hove singularity, whose physical mechanism fundamentally differs from their Hermitian counterparts. This singularity is experimentally observable in linear responses.

Cellular immunotherapy combined with platinum-based chemotherapy prolongs survival for non-small cell lung cancer patients.

Platinum-based chemotherapy is the primary treatment option for advanced non-small cell lung cancer (NSCLC) patients without a driver gene mutation, but its efficacy is still modest. Through a potential synergistic effect, autologous cellular immunotherapy (CIT) composed of cytokine-induced killer (CIK), natural killer (NK), and T cells might enhance it. NK cells exhibited in vitro cytotoxicity toward lung cancer cells (A549 cells) following platinum therapy. Using flow cytometry, the expression of MICA, MICB, DR4, DR5, CD112, and CD155 on lung cancer cells was assessed. In this retrospective cohort study, there were included 102 previously untreated stage IIIB/IV NSCLC patients ineligible for tyrosine kinase inhibitor (TKI) target therapy who received either chemotherapy alone (n=75) or combination therapy (n=27). The cytotoxicity of NK cells for A549 cells was increased obviously and a time-dependent enhancement of this effect was also observed. After platinum therapy, the levels of MICA, MICB, DR4, DR5, CD112, and CD155 on the surface of A549 cells were increased. In the combination group, the median PFS was 8.3 months, compared to 5.5 months in the control group (p=0.042); the median overall survival was 18.00 months, compared to 13.67 months in the combined group (p=0.003). The combination group had no obvious immune-related adverse effects. The combination of NK cells with platinum showed synergistic anticancer effects. Combining the two strategies increased survival with minor adverse effects. Incorporating CIT into conventional chemotherapy regimens may improve NSCLC treatment. However, additional evidence will require multicenter randomized controlled trials.

Local Hyperthermia Versus Cryotherapy for Treatment of Plantar Warts: A Prospective Multi-centre Non-randomized Concurrent Controlled Clinical Trial.

Cryotherapy is one of the most common treatments for warts; however, pain during treatment and relatively high recurrence rates limit its use. Local hyperthermia has also been used successfully in the treatment of plantar warts. The aim of this study was to compare the clinical effectiveness of local hyperthermia vs cryotherapy for the treatment of plantar warts. This multi- centre, open, 2-arm, non-randomized concurrent controlled trial included 1,027 patients, who received either cryotherapy or local hyperthermia treatment. Three months after treatment, local hyperthermia and cryotherapy achieved complete clearance rates of 50.9% and 54.3%, respectively. Recurrence rates were 0.8% and 12%, respectively. Pain scores during local hyperthermia were significantly lower than for cryotherapy. Both local hyperthermia and cryotherapy demonstrated similar efficacy for clearance of plantar warts; while local hyperthermia had a lower recurrence rate and lower pain sensation during treatment.

Mowing mitigates the negative impacts of N addition on plant species diversity.

Increasing availability of reactive nitrogen (N) threatens plant diversity in diverse ecosystems. While there is mounting evidence for the negative impacts of N deposition on one component of diversity, species richness, we know little about its effects on another one, species evenness. It is suspected that ecosystem management practice that removes nitrogen from the ecosystem, such as hay-harvesting by mowing in grasslands, would mitigate the negative impacts of N deposition on plant diversity. However, empirical evidence is scarce. Here, we reported the main and interactive effects of N deposition and mowing on plant diversity in a temperate meadow steppe with 4-year data from a field experiment within which multi-level N addition rates and multiple N compounds are considered. Across all the types of N compounds, species richness and evenness significantly decreased with the increases of N addition rate, which was mainly caused by the growth of a tall rhizomatous grass, Leymus chinensis. Such negative impacts of N addition were accumulating with time. Mowing significantly reduced the dominance of L. chinensis, and mitigated the negative impacts of N deposition on species evenness. We present robust evidence that N deposition threatened biodiversity by reducing both species richness and evenness, a process which could be alleviated by mowing. Our results highlight the changes of species evenness in driving the negative impacts of N deposition on plant diversity and the role of mowing in mediating such negative impacts of N deposition.

Correction to: Mowing mitigates the negative impacts of N addition on plant species diversity.

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Cutaneous T cell lymphoma expresses immunosuppressive CD80 (B7-1) cell surface protein in a STAT5-dependent manner.

In this article, we report that cutaneous T cell lymphoma (CTCL) cells and tissues ubiquitously express the immunosuppressive cell surface protein CD80 (B7-1). CD80 expression in CTCL cells is strictly dependent on the expression of both members of the STAT5 family, STAT5a and STAT5b, as well as their joint ability to transcriptionally activate the CD80 gene. In IL-2-dependent CTCL cells, CD80 expression is induced by the cytokine in a Jak1/3- and STAT5a/b-dependent manner, whereas in the CTCL cells with constitutive STAT5 activation, CD80 expression is also STAT5a/b dependent but is independent of Jak activity. Although depletion of CD80 expression does not affect the proliferation rate and viability of CTCL cells, induced expression of the cell-inhibitory receptor of CD80, CD152 (CTLA-4), impairs growth of the cells. Coculture of CTCL cells with normal T lymphocytes consisting of both CD4(+) and CD8(+) populations or the CD4(+) subset alone, transfected with CD152 mRNA, inhibits proliferation of normal T cells in a CD152- and CD80-dependent manner. These data identify a new mechanism of immune evasion in CTCL and suggest that the CD80-CD152 axis may become a therapeutic target in this type of lymphoma.

Population pharmacokinetic modeling and simulation of huperzine A in elderly Chinese subjects.

AIM: Our preliminary results show that huperzine A, an acetylcholinesterase inhibitor used to treat Alzheimer's disease (AD) patients in China, exhibits different pharmacokinetic features in elderly and young healthy subjects. However, its pharmacokinetic data in elderly subjects remains unavailable to date. Thus, we developed a population pharmacokinetic (PPK) model of huperzine A in elderly Chinese people, and identified the covariate affecting its pharmacokinetics for optimal individual administration. METHODS: A total of 341 serum huperzine A concentration records was obtained from 2 completed clinical trials (14 elderly healthy subjects in a phase I pharmacokinetic study; 35 elderly AD patients in a phase II study). Population pharmacokinetic analysis was performed using the non-linear mixed-effect modeling software Phoenix NLME1.1.1. The effects of age, gender, body weight, height, creatinine, endogenous creatinine clearance rate as well as drugs administered concomitantly were analyzed. Bootstrap and visual predictive checks were used simultaneously to validate the final population pharmacokinetics models. RESULTS: The plasma concentration-time profile of huperzine A was best described by a one-compartment model with first-order absorption and elimination. Age was identified as the covariate having significant influence on huperzine A clearance. The final PPK model of huperzine A was: CL (L/h)=2.4649(*)(age/86)((-3.3856)), Ka=0.6750 h(-1), V (L)=104.216. The final PPK model was demonstrated to be suitable and effective by the bootstrap and visual predictive checks. CONCLUSION: A PPK model of huperzine A in elderly Chinese subjects is established, which can be used to predict PPK parameters of huperzine A in the treatment of elderly AD patients.

Effect of serum choice on replicative senescence in mesenchymal stromal cells.

BACKGROUND AIMS: Multipotent mesenchymal stromal cells (MSCs) are promising candidates for innovative cell therapeutic applications. Before their use, however, they usually need to be expanded in vitro with serum-supplemented media. MSCs can undergo replicative senescence during in vitro expansion, but it is not yet clear how serum supplements influence this process. METHODS: In the present study, we compared how media supplemented with fetal bovine serum (FBS) or calf serum (CS) affected morphology, proliferation, differentiation, senescence and other functional characteristics of human umbilical cord-derived MSCs (UC-MSCs). RESULTS: UC-MSCs cultured in both FBS- and CS-containing media were able to differentiate along osteogenic and adipogenic lineages but ultimately reached proliferation arrest. However, senescence-associated characteristics, such as ß-galactosidase activity, reactive oxygen species levels, proliferation rate and gene expression, demonstrate that UC-MSCs grown with FBS have better proliferation potential and differentiation capacity. In contrast, UC-MSCs grown with CS have a higher proportion of apoptotic cells and senescent characteristics. Possible mechanisms for the observed phenotypes include changes in gene expression (Bax, p16, p21 and p53) and cytokine production (interleukin-6 and interleukin-8). CONCLUSIONS: This study demonstrates that FBS-supplemented media provides a better microenvironment for the expansion of UC-MSCs in vitro than CS-supplemented media. This work provides insight into MSCs generation practices for use in basic research and clinical therapies.

The potent oncogene NPM-ALK mediates malignant transformation of normal human CD4(+) T lymphocytes.

With this study we have demonstrated that in vitro transduction of normal human CD4(+) T lymphocytes with NPM-ALK results in their malignant transformation. The transformed cells become immortalized and display morphology and immunophenotype characteristic of patient-derived anaplastic large-cell lymphomas. These unique features, which are strictly dependent on NPM-ALK activity and expression, include perpetual cell growth, proliferation, and survival; activation of the key signal transduction pathways STAT3 and mTORC1; and expression of CD30 (the hallmark of anaplastic large-cell lymphoma) and of immunosuppressive cytokine IL-10 and cell-surface protein PD-L1/CD274. Implantation of NPM-ALK-transformed CD4(+) T lymphocytes into immunodeficient mice resulted in formation of tumors indistinguishable from patients' anaplastic large-cell lymphomas. Our findings demonstrate that the key aspects of human carcinogenesis closely recapitulating the features of the native tumors can be faithfully reproduced in vitro when an appropriate oncogene is used to transform its natural target cells; this in turn points to the fundamental role in malignant cell transformation of potent oncogenes expressed in the relevant target cells. Such transformed cells should permit study of the early stages of carcinogenesis, and in particular the initial oncogene-host cell interactions. This experimental design could also be useful for studies of the effects of early therapeutic intervention and likely also the mechanisms of malignant progression.

IL-2R common gamma-chain is epigenetically silenced by nucleophosphin-anaplastic lymphoma kinase (NPM-ALK) and acts as a tumor suppressor by targeting NPM-ALK.

Anaplastic lymphoma kinase (ALK), physiologically expressed only by certain neural cells, becomes highly oncogenic, when aberrantly expressed in nonneural tissues as a fusion protein with nucleophosphin (NPM) and other partners. The reason why NPM-ALK succeeds in transforming specifically CD4(+) T lymphocytes remains unknown. The IL-2R common γ-chain (IL-2Rγ) is shared by receptors for several cytokines that play key roles in the maturation and growth of normal CD4(+) T lymphocytes and other immune cells. We show that IL-2Rγ expression is inhibited in T-cell lymphoma cells expressing NPM-ALK kinase as a result of DNA methylation of the IL-2Rγ gene promoter. IL-2Rγ promoter methylation is induced in malignant T cells by NPM-ALK. NPM-ALK acts through STAT3, a transcription factor that binds to the IL-2Rγ gene promoter and enhances binding of DNA methyltransferases (DNMTs) to the promoter. In addition, STAT3 suppresses expression of miR-21, which selectively inhibits DNMT1 mRNA expression. Reconstitution of IL-2Rγ expression leads to loss of the NPM-ALK protein and, consequently, apoptotic cell death of the lymphoma cells. These results demonstrate that the oncogenic tyrosine kinase NPM-ALK induces epigenetic silencing of the IL-2Rγ gene and that IL-2Rγ acts as a tumor suppressor by reciprocally inhibiting expression of NPM-ALK.

[Research of mechanism jinxueyuan granules increased saliva secretion of xerostomia model rats].

To analyze the specific mechanism of Jinxueyuan granules, the relationship between the Jinxueyuan granules increased the saliva secretion of xerostomia model SD rats and excitement of receptors were studied in this experiment. In the study, three groups of xerostomia model rats were successfully established by using M-receptor blockers-4-diphenyl-acetoxy-N-methyl-piperidine (4-DAMP) and atropine, or adrenergic receptor blocker phentolamine; after the modeling, the medicine Jinxueyuan granules were gavaged. According to the clinical dose of Jinxueyuan granules and SD rats body surface area, the rats in atropine group were divided three dose groups respectively, namely low, medium and high dose of Jinxueyuan granules groups. The 4-DAMP group and phentolamine group were gavaged medium dose of Jinxueyuan granules. And the amount of salivary secretion for 150 minutes in all groups continuously were measured, and the effect of Jinxueyuan granules increased salivation and the relationship between characteristics and the receptors were observed; and submandibular gland tissue of the rats was isolated, then the effect of Jinxueyuan Granules for expression of the water channel protein aquaporin-5 (AQP5) in submandibular gland cells was analyzed by the Western blot technology. It was found that the saliva secretion of Jinxueyuan Granules groups was increased significantly, and compared with the saline control group, phentolamine group, 4-DAMP group and atropine group, difference was significant, P < 0.05. There was no significant difference between the low-dose of Jinxueyuan granules group and the saline group, but the medium dose of Jinxueyuan granules group had a significant difference, compared with the saline group (P < 0.05). In the time distribution of increasing saliva secretion, there was a significant difference between the saline and Jinxueyuan granules group in the saliva secretion (P < 0.05). After administration of Jinxueyuan granules, the expression of AQP5 protein in the submandibular gland cells expressing of treatment groups was increased, and compared with the blocker groups, there was a significant difference, P < 0.05. Except the atropine group, there was no significant difference in Jinxueyuan granules relieving the inhibition induced by blocks in phentolamine group and 4-DAMP group, compared with the saline group. Compared the AQP5 expression in three blockers groups, there was no significant difference in the efficacy of Jinxueyuan granules between phentolamine group and 4-DAMP group; but there was a significant difference between the atropine group and other groups (P < 0.05). Therefore, it was considered that the mechanism of Jinxueyuan granules increasing saliva secretion (effectiveness of nourishing Yin and generating body fluid ) possibly through the pathway mediated by muscarinic M receptor, especially M3 receptor, or adrenergic receptor, and increased expression of salivary gland AQP5 membrane, and then stimulate saliva production.

[Blood pressure control and glucose metabolism status in hypertension specialty clinics in China].

OBJECTIVE: To investigate blood pressure control the glucose metabolism, cardiovascular risk factors of patients who were regularly followed up at professional hypertension clinics in China. METHODS: A cross-sectional survey was conducted in 32 004 patients from 127 professional hypertension clinics across China. The questionnaires included case history and related treatment physical examination and laboratory biochemical tests were also taken at the same time. RESULTS: The mean blood pressure of overall population was (151 ± 13)/(92 ± 10) mm Hg(1 mm Hg = 0.133 kPa). Totally 3424 patients (10.7%) had never taken any anti-hypertension medicine. Among patients treated with anti-hypertension drugs, 19 818 were of mono-therapy (69.3%) and 8762 were of combination therapy. The most frequently used drug was renin-angiotensin system inhibitor, followed by calcium-channel blocker. Fixed compound preparations accounted for 15.6%. The overall blood pressure control rate (<140/90 mm Hg ) was 26.8%, among them, 27.7%, 30.0%, 25.4% and 21.3% patients were complicated with coronary heart disease, diabetes mellitus, kidney diseases and cerebral stroke respectively. About 70.3% hypertensive patients had abnormal glucose metabolism whose mean glycosylated hemoglobin (GHbA1c) was 7.84%, which was significantly higher than 7.0% , the target value defined by ADA.Even among them, 20.2% patients have never received any anti-diabetic drugs.Low-risk and medium-risk patients accounted for 16.0%. Totally 48.0% patients were classified in high-risk group and 36.0% in very high risk group. About half of all patients had different target organ dysfunction. About 49.0% patients had associated comorbidities. CONCLUSIONS: Co-existence of hypertension and abnormal glucose metabolism is common in Chinese population. Among these patients, target organ dysfunction and comorbidities are prevalent, but blood pressure is only effectively controlled in less than 30% patients. Low proportion of combination therapy is one of the reasons for unsatisfied control of blood pressure.It indicates that effective management of hypertension is urgent.

[Characteristics and related risk factors of arterial elasticity in prehypertensive persons].

OBJECTIVE: To explore the characteristics and related risk factors of arterial elasticity in persons with prehypertension, high-normal blood lipid and(or) impaired glucose regulation(impaired fasting glucose and(or) impaired glucose tolerance). METHODS: After receiving physical and biochemical examinations, a total of 1238 persons were enrolled. Among them, the etiologies were prehypertension (n = 65), high-normal blood lipid (n = 156), impaired glucose regulation (n = 159), prehypertension and high-normal blood lipid (n = 85), prehypertension and impaired glucose regulation (n = 77), high-normal blood lipid and impaired glucose regulation (n = 55) and prehypertension, high-normal blood lipid and impaired glucose regulation (n = 9). Also 332 healthy subjects, 113 hypertensive patients, 150 hyperlipidemics and 37 diabetics were enrolled as controls. Systemic vascular compliance (SVC), systemic vascular resistance (SVR), brachial artery distensibility (BAD) were measured with Dynapulse 200 M (Pulse Metric, Inc., USA). RESULTS: In persons with prehypertension, SVC was lower than healty group ((1.14 ± 0.20) ml vs (1.26 ± 0.23) ml, P < 0.01)and higher than hypertensive group ((1.11 ± 0.18) ml, P = 0.011), SVR higher than healty group (157 ± 29) kPa×s×L(-1) vs (148 ± 25) kPa×s×L(-1), P = 0.012) and lower than hypertensive group ((166 ± 36) kPa×s×L(-1), P < 0.01)and BAD lower than healty group(5.93% ± 1.14% vs 6.50% ± 1.30%, P < 0.01). Among different groups with prehypertension, high-normal blood lipid and(or) impaired glucose regulation, SVC, SVR and BAD had significant differences. As indicated by multiple linear regression analysis, blood pressure was an independent risk factor of arterial elasticity. CONCLUSIONS: Vascular function becomes damaged in prehypertensive stage. As an independent risk factor, blood pressure had more potent effect than lipid and blood glucose. Multiple cardiovascular risk factors with high-normal value may affect vascular function more strongly.

[Effects of different antihypertensive strategies on reversing urinary albumin excretion].

OBJECTIVE: To explore the effects of different antihypertensive strategies on blood pressure and urinary albumin excretion in patients with hypertension and microalbuminuria. METHODS: For this multi-center, randomized, positively controlled clinical trial, a total of 531 patients with mild-to-moderate essential hypertension and microalbuminuria were enrolled. They were divided randomly into calcium channel blocker (CCB), angiotensin II receptor antagonist (ARB) and CCB+ARB groups. The whole treatment period was 6 months. RESULTS: According to ANOVA analysis, the post-therapeutic urinary albumin level decreased 20.6, 27.6 and 30.9 mg/L in CCB, ARB and CCB+ARB groups respectively (P = 0.067). And the extents of urinary albumin reduction were 31.1 and 6.6 mg/L in patients with controlled and uncontrolled blood pressure respectively (P < 0.001). CONCLUSION: Effective antihypertensive therapy is a key for decreasing urinary albumin excretion in hypertensive patients. As compared with calcium antagonists, ARB-containing regimens appear to be better in reducing urinary albumin.

[Status of glucose metabolism in Chinese essential hypertensive patients].

OBJECTIVE: To investigate glucose metabolism status and its relationship with blood pressure, obesity, renal function and cardio-cerebral vascular events in Chinese essential hypertensive patients. METHODS: Essential hypertensive patients without diabetic history were enrolled in this cross-sectional survey. All patients filled in questionnaires and received physical examination and laboratory tests. Oral glucose tolerance test (OGTT, fasting and 2 hours glucose level after drinking the 75 g glucose solution) was performed in patients who signed the informed consent. RESULTS: (1) The control rate of systolic BP was lower in patients with dysglycemia than in patients without dysglycemia (41.0% vs. 46.4%, P = 0.000). (2) The albuminuria detection rate and the abnormal rate of estimated glumerular filtration rate (eGFR) increased significantly with the deterioration of glucose metabolism. (3) Multifactor-analysis showed that abnormal waist circumference, decreased eGFR and presence of albuminuria were independent risk factors for abnormal glucose metabolism. Cardiovascular events was significantly higher in patients with abnormal glucose metabolism than patients with normal glucose metabolism. CONCLUSION: Abnormal glucose metabolism is common in Chinese essential hypertensive patients. When complicated with abnormal glucose metabolism, essential hypertensive patients had poor blood pressure control rate and were related to higher cardiovascular risk.

TMED2/9/10 Serve as Biomarkers for Poor Prognosis in Head and Neck Squamous Carcinoma.

Background: Head and neck squamous carcinoma (HNSC) is one of the most common malignant tumors with high incidence and poor prognosis. Transmembrane emp24 structural domain (TMED) proteins are involved in protein transport and vesicle budding processes, which have implicated various malignancies' progression. However, the roles of TMEDs in HNSC, especially in terms of development and prognosis, have not been fully elucidated. Methods: We applied TIMER 2.0, UALCAN, GEPIA 2, Kaplan-Meier plotter, GEO, The Human Protein Atlas (HPA), cBioPortal, Linkedomics, Metascape, GRNdb, STRING, and Cytoscape to investigate the roles of TMED family members in HNSC. Results: Compared with normal tissues, the mRNA expression levels of TMED1/2/4/5/7/8/9/10 were significantly increased in the TCGA HNSC dataset. And we combined GEPIA 2 and Kaplan-Meier Plotter to select TMED2/9/10 with prognostic value. Then we detected the levels of mRNA in the GEO HNSC database and the protein expression in HPA. It was found that the mRNA and protein expression levels of TMED2/9/10 were increased in HNSC. Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) analysis showed that TMED2/9/10 and their co-expressed genes promoted the malignant behavior of tumors by participating in biological processes such as intracellular transferase complex, protein transport, focal adhesion, intracellular protein processing. Single-cell analysis and immune infiltration analysis suggested that immune responses of cancer-associated fibroblasts and endothelial cells might be associated with prognosis. Finally, the transcription factors-genes network and protein-protein functional interaction network pointed to genes such as X-box binding protein 1 (XBP1) and TMED7, which might cooperate with TMED2/9/10 to change the progression of HNSC. Conclusions: Our study implied that TMED2/9/10 and related genes mightjointly affect the prognosis of HNSC, providing specific clues for further experimental research, personalized diagnosis strategies, and targeted clinical therapy for HNSC.

Oncogenic kinase NPM/ALK induces through STAT3 expression of immunosuppressive protein CD274 (PD-L1, B7-H1).

The mechanisms of malignant cell transformation caused by the oncogenic, chimeric nucleophosmin (NPM)/anaplastic lymphoma kinase (ALK) remain only partially understood, with most of the previous studies focusing mainly on the impact of NPM/ALK on cell survival and proliferation. Here we report that the NPM/ALK-carrying T cell lymphoma (ALK+TCL) cells strongly express the immunosuppressive cell-surface protein CD274 (PD-L1, B7-H1), as determined on the mRNA and protein level. The CD274 expression is strictly dependent on the expression and enzymatic activity of NPM/ALK, as demonstrated by inhibition of the NPM/ALK function in ALK+TCL cells by the small molecule ALK inhibitor CEP-14083 and by documenting CD274 expression in IL-3-depleted BaF3 cells transfected with the wild-type NPM/ALK, but not the kinase-inactive NPM/ALK K210R mutant or empty vector alone. NPM/ALK induces CD274 expression by activating its key signal transmitter, transcription factor STAT3. STAT3 binds to the CD274 gene promoter in vitro and in vivo, as shown in the gel electromobility shift and chromatin immunoprecipitation assays, and is required for the PD-L1 gene expression, as demonstrated by siRNA-mediated STAT3 depletion. These findings identify an additional cell-transforming property of NPM/ALK and describe a direct link between an oncoprotein and an immunosuppressive cell-surface protein. These results also provide an additional rationale to therapeutically target NPM/ALK and STAT3 in ALK+TCL. Finally, they suggest that future immunotherapeutic protocols for this type of lymphoma may need to include the inhibition of NPM/ALK and STAT3 to achieve optimal clinical efficacy.

[The efficacy and safety of 2 cycles' high-dose dexamethasone treatment adult primary immune thrombocytopenia].

OBJECTIVE: To investigate the efficacy and safety of a schedule of 2 cycles' high-dose dexamethasone (HD-DXM) as an initial therapy in adults immune thrombocytopenia (ITP), and compare with conventional dose prednisone therapy. METHOD: A total of 59 newly diagnosed ITP patients were divided into 2 groups randomly. In 30 patients (Dexamethasone group), oral HD-DXM was administered at 40 mg/d for 4 consecutive days, repeated one week later, and then failed to maintain. In the remaining 29 patients (Prednisone group), prednisone was administered orally at 1.0 - 1.5 mg×kg(-1)×d(-1) for 4 weeks, and then gradually tapered. RESULTS: For short-term efficacy, after 1 and 2 weeks of treatment, the response rate in Dexamethasone group was significantly higher than that in Prednisone group (50.0% vs 24.1%, P < 0.01; 73.3% vs 55.2%, P < 0.05), while 3 weeks later, there was no remarkable difference between the two groups (83.3% vs 68.9%, P > 0.05), though the response rate in Dexamethasone group remained higher. For long-term effect, at the end of the 2nd and 3rd months of follow-up, the relapse rate in Dexamethasone group was significantly lower than that in Prednisone group (24.0% vs 40.0%, P < 0.05; 32.0% vs 65.0%, P < 0.01), while at the end of the 1(st) month of follow-up, there was no significant difference (16.0% vs 20.0%, P > 0.05). In addition, it's well tolerated and no complications such as severe infection or Cushing syndrome were complained in Dexamethasone group. CONCLUSION: HD-DXM possesses an advantage over conventional dose prednisone therapy in efficacy and safety.

BMI1 activates P-glycoprotein via transcription repression of miR-3682-3p and enhances chemoresistance of bladder cancer cell.

Chemoresistance is the most significant reason for the failure of cancer treatment following radical cystectomy. The response rate to the first-line chemotherapy of cisplatin and gemcitabine does not exceed 50%. In our previous research, elevated BMI1 (B-cell specific Moloney murine leukemia virus integration region 1) expression in bladder cancer conferred poor survival and was associated with chemoresistance. Herein, via analysis of The Cancer Genome Atlas database and validation of clinical samples, BMI1 was elevated in patients with bladder cancer resistant to cisplatin and gemcitabine, which conferred tumor relapse and progression. Consistently, BMI1 was markedly increased in the established cisplatin- and gemcitabine-resistant T24 cells (T24/DDP&GEM). Functionally, BMI1 overexpression dramatically promoted drug efflux, enhanced viability and decreased apoptosis of bladder cancer cells upon treatment with cisplatin or gemcitabine, whereas BMI1 downregulation reversed this effect. Mechanically, upon interaction with p53, BMI1 was recruited on the promoter of miR-3682-3p gene concomitant with an increase in the mono-ubiquitination of histone H2A lysine 119, leading to transcription repression of miR-3682-3p gene followed by derepression of ABCB1 (ATP binding cassette subfamily B member 1) gene. Moreover, suppression of P-glycoprotein by miR-3682-3p mimics or its inhibitor XR-9576, could significantly reverse chemoresistance of T24/DDP&GEM cells. These results provided a novel insight into a portion of the mechanism underlying BMI1-mediated chemoresistance in bladder cancer.

Comprehensive signature analysis of drug metabolism differences in the White, Black and Asian prostate cancer patients.

The drug response sensitivity and related prognosis of prostate cancer varied from races, while the original mechanism remains rarely understood. In this study, the comprehensive signature including transcriptomics, epigenome and single nucleotide polymorphisms (SNPs) of 485 PCa cases- including 415 Whites, 58 Blacks and 12 Asians from the TCGA database were analyzed to investigate the drug metabolism differences between races. We found that Blacks and Whites had a more prominent drug metabolism, cytotoxic therapy resistance, and endocrine therapy resistance than Asians, while Whites were more prominent in drug metabolism, cytotoxic therapy resistance and endocrine therapy resistance than Blacks. Subsequently, the targeted regulation analysis indicated that the racial differences in cytotoxic therapy resistance, endocrine therapy resistance, might originate from drug metabolisms, and 19 drug metabolism-related core genes were confirmed in the multi-omics network for subsequent analysis. Furthermore, we verified that CYP1A1, CYP3A4, CYP2B6, UGT2B17, UGT2B7, UGT1A8, UGT2B11, GAS5, SNHG6, XIST significantly affected antineoplastic drugs sensitivities in PCa cell lines, and these genes also showed good predictive efficiency of drug response and treatment outcomes for PCa in this cohort of patients. These findings revealed a comprehensive signature of drug metabolism differences for the Whites, Blacks and Asians, and it may provide some evidence for making individualized treatment strategies.