32247792
Effects of 9-cis-retinoic acid on the insulin-like growth factor axis in former smokers.
PURPOSE
Insulin-like growth factor (IGF) axis has been associated with the risk of lung cancer. 9-cis-retinoic acid (9-cis-RA) has shown potential chemopreventive activities in former smokers. This study was designed to evaluate the effects of 9-cis-RA on IGF axis in former smokers to identify any benefit the retinoid may have in preventing lung cancer.


PATIENTS AND METHODS
Serum concentrations of IGF-I, IGF binding protein (IGFBP)-3, and their molar ratio (IGF-I/IGFBP-3) were measured with radioimmunoassay kits in stored blood samples from the participants of an original chemoprevention trial. The participants had ceased smoking for at least 12 months and were randomly assigned to receive 3 months of daily oral 9-cis-RA (100 mg) or placebo. All statistical tests were two-sided.


RESULTS
A total of 111 samples from the study's baseline and 84 samples from the 3 months treatment were analyzed. The serum concentrations of IGF-I and IGF-I/IGFBP-3 at baseline were significantly lower in female than in male participants. After 3 months of treatment, the serum level of IGF-I and IGF-I/IGFBP-3 were significantly lower in the 9-cis-RA group than in the placebo group (P = .03 and P < .01, respectively), but the IGFBP-3 level was significantly higher (P = .03).


CONCLUSION
9-cis-RA treatment modulated the IGF axis in former smokers, suggesting that the IGF axis is a potential target for the chemopreventive activities of 9-cis-RA and that the serum concentrations of IGF, IGFBP-3, and IGF-I/IGFBP-3 could serve as surrogate end point biomarkers of 9-cis-RA treatment.
22843758
Insulin-like growth factor binding protein-3 inhibits the growth of non-small cell lung cancer.
Insulin-like growth factors (IGFs) have mitogenic and antiapoptotic properties and have been implicated in the development of lung cancer. The effects of IGFs are modulated by insulin-like growth factor binding proteins (IGFBPs). This study explored the effects of IGFBP-3 on non-small cell lung cancer (NSCLC) cells after infection with an adenovirus constitutively expressing IGFBP-3 under the control of the cytomegalovirus promoter (Ad5CMV-BP3). We found that IGFs, especially IGF-I, stimulated the growth of NSCLC cells, and Ad5CMV-BP3 suppressed this IGF-I-induced NSCLC cell growth. We also found that the clonogenicity of H1299 cells in soft agar was markedly reduced by Ad5CMV-BP3. Furthermore, direct injection of Ad5CMV-BP3 into H1299 NSCLC xenografts s.c. established in athymic nude mice induced massive destruction of the tumors. Ad5CMV-BP3 did not induce detectable cytotoxicity on normal human bronchial epithelial cells, suggesting therapeutic efficacy of this virus. Ad5CMV-BP3 infection was accompanied by apoptotic cell death in vitro as detected by flow cytometry, DNA fragmentation analysis, and Western blot analysis on the expression of Bcl-2 and on the cleavage of poly(ADP-ribose) polymerase, a substrate of caspase 3. Immunofluorescence confocal microscopy was also used to show the apoptotic effect of Ad5CMV-BP3 in H1299 tumors established in nude mice. These findings indicated that IGFBP-3 was a potent inducer of apoptosis in NSCLC cells in vitro and in vivo. To delineate the underlying mechanism, we examined the effect of IGFBP-3 on Akt/protein kinase B and glycogen synthase kinase-3beta, downstream mediators of the phosphatidylinositol 3-kinase pathway, and on mitogen-activated protein kinase (MAPK), all three of which are activated by IGF-mediated signaling pathways and have important roles in cell survival. IGFBP-3 overexpression inhibited the phosphorylation of Akt and glycogen synthase kinase-3beta and the activity of MAPK. Furthermore, IGF-I rescued the NSCLC cells from serum depletion-induced apoptosis, and this rescue was blocked in Ad5CMV-BP-3-infected H1299 NSCLC cells. Transient transfection with activated Akt or constitutively active MAPK kinase-1, an upstream activator of MAPK, partially blocked IGFBP-3-induced apoptosis of NSCLC cells. These findings suggested that the growth-regulatory effect of IGFBP-3 on NSCLC cells was attributable in part to the inhibition of the IGF-induced survival pathway. These data demonstrate the importance of IGFBP-3 in the regulation of NSCLC cell proliferation, clonogenicity, and tumor growth, suggesting that IGFBP-3 is a target for the treatment of lung cancer and that Ad5CMV-BP3 is a potential therapeutic agent.
25306146
Response of Non–Small Cell Lung Cancer Cells to the Inhibitors of Phosphatidylinositol 3-Kinase/Akt- and MAPK Kinase 4/c-Jun NH2-Terminal Kinase Pathways: An Effective Therapeutic Strategy for Lung Cancer
Purpose: We previously showed that phosphatidylinositol 3-kinase (PI3K)/Akt and mitogen-activated protein kinase (MAPK) pathways cooperate to promote non–small cell lung cancer (NSCLC) cell proliferation in vitro. This study was designed to explore whether inhibition of these pathways effectively inhibits NSCLC tumor growth in vivo. Experimental Design: The effects of PI3K/Akt inhibitors {LY294002, adenoviruses expressing dominant-negative mutant of the p85α adaptor subunit of PI3K (Ad-dnp85α), dominant-negative Akt [Ad-HA-Akt(KM)], or PTEN (Ad-PTEN)}, MKK4/c-jun NH2-terminal kinase (JNK) inhibitor [SP600215, adenovirus expressing dominant-negative MKK4, Ad-MKK4(KR)], and their combinations on proliferation and apoptosis in NSCLC cells were tested in vitro and in vivo using the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay, a flow cytometry-based terminal deoxynucleotidyl transferase–mediated nick-end labeling assay, Western blot and immunohistochemical analyses, and an NSCLC xenograft tumor model. Results: Ad-dnp85α significantly inhibited proliferation of a subset of NSCLC cell lines used in our study. Intratumoral injection of Ad-dnp85α induced a significant decrease in the growth of H1299 NSCLC xenograft tumors. Concurrent inhibition of the PI3K/Akt and MKK4/JNK pathways showed enhanced antiproliferative effects on H1299 cells in vitro and in vivo by increasing apoptosis. Conclusions: PI3K/Akt and MKK4/JNK pathways cooperate to stimulate NSCLC cell proliferation by maintaining cell survival, suggesting that simultaneously targeting these two pathways might be an effective therapeutic strategy against NSCLC.
2572634
Effects of interscalene brachial plexus block to intra-operative hemodynamics and postoperative pain for arthroscopic shoulder surgery
Background Although arthroscopic shoulder surgery is less invasive and painful than open shoulder surgery, it can often cause intra-operative hemodynamic instability and severe post-operative pain. This study was conducted to investigate the efficacy of the interscalene brachial plexus block (IBPB) on intra-operative hemodynamic changes and post-operative pain during arthroscopic shoulder surgery. Methods After institutional review board approval, 50 consecutive patients that had undergone arthroscopic shoulder surgery under general anesthesia were randomly assigned to one of two groups to evaluate intra-operative hemodynamic changes and post-operative pain control. Group 1 patients received an IBPB with 10 ml of normal saline guided by a nerve stimulator before induction, and Group 2 patients received 10 ml of 0.5% ropivacaine hydrochloride with the same technique. The heart rate and systolic and diastolic blood pressures were recorded before the incision and 1, 3, 5, 10, and 20 minutes after the incision. Pre-operative and post-operative pain was evaluated with a visual analog scale 1, 3, 6, 12, and 24 hours after surgery. The patients were given tramadol as a rescue medication option. The total volume of tramadol that was injected was also evaluated over the same intervals. Results Group 2 showed significantly lower systolic and diastolic blood pressures and heart rates intra-operatively compared to Group 1 (P < 0.05). The visual analog scale pain scores, except at 24 hours after surgery, were significantly lower in Group 2 (P < 0.05). The total tramadol consumption significantly reduced in Group 2 (P < 0.05). Conclusions IBPB effectively controlled the hemodynamic changes that occurred during arthroscopic shoulder surgery as well as post-operative pain.
18237995
mtDNAmanager: a Web-based tool for the management and quality analysis of mitochondrial DNA control-region sequences
BackgroundFor the past few years, scientific controversy has surrounded the large number of errors in forensic and literature mitochondrial DNA (mtDNA) data. However, recent research has shown that using mtDNA phylogeny and referring to known mtDNA haplotypes can be useful for checking the quality of sequence data.ResultsWe developed a Web-based bioinformatics resource "mtDNAmanager" that offers a convenient interface supporting the management and quality analysis of mtDNA sequence data. The mtDNAmanager performs computations on mtDNA control-region sequences to estimate the most-probable mtDNA haplogroups and retrieves similar sequences from a selected database. By the phased designation of the most-probable haplogroups (both expected and estimated haplogroups), mtDNAmanager enables users to systematically detect errors whilst allowing for confirmation of the presence of clear key diagnostic mutations and accompanying mutations. The query tools of mtDNAmanager also facilitate database screening with two options of "match" and "include the queried nucleotide polymorphism". In addition, mtDNAmanager provides Web interfaces for users to manage and analyse their own data in batch mode.ConclusionThe mtDNAmanager will provide systematic routines for mtDNA sequence data management and analysis via easily accessible Web interfaces, and thus should be very useful for population, medical and forensic studies that employ mtDNA analysis. mtDNAmanager can be accessed at http://mtmanager.yonsei.ac.kr.
25169243
Trial of aripiprazole in the treatment of first-episode schizophrenia.
AIMS
Aripiprazole is an atypical antipsychotic indicated for the treatment of adult patients with schizophrenia. It is effective and well tolerated in patients with schizophrenia or schizoaffective disorder. The aim of the present study was to investigate therapeutic efficacy and tolerability of aripiprazole in patients with first-episode schizophrenia.


METHODS
Twenty-one patients meeting the DSM-IV criteria for schizophrenia were recruited. The Positive and Negative Symptom Scale (PANSS) and the Clinical Global Impressions Scale (CGI) were completed at the beginning of the study and again after 1, 2, 4, and 8 weeks of aripiprazole treatment. Side-effects were analyzed using the Udvalg for Kliniske Undersøgelser Side-Effect Rating Scale. Weight was checked at each testing session, and prolactin levels were measured at baseline and after 8 weeks of aripiprazole treatment.


RESULTS
Significant benefits were observed after the first week of treatment. After 1 week of aripiprazole treatment, subscale and total scores on the PANSS had decreased significantly. This significant decrease was maintained throughout the study period. The mean score of CGI severity was also significantly different after 2 weeks of aripiprazole administration when compared to baseline score, and the significance was maintained thereafter. Weight did not significantly change after aripiprazole administration. Although mean prolactin level was decreased at 8 weeks, the difference was not significant.


CONCLUSIONS
Aripiprazole is an effective and well-tolerated antipsychotic agent in patients with first-episode schizophrenia. Further investigations with larger samples are needed.
1110402
The written language performance of children with Attention Deficit Hyperactivity Disorder in Taiwan.
Poor writing is common in children with Attention Deficit Hyperactivity Disorder (ADHD). However, the writing performance of children with ADHD has been rarely formally explored in Taiwan, so the purpose of this study was to investigate writing features of children with ADHD in Taiwan. There were 25 children with ADHD and 25 normal children involved in a standardization writing assessment - Written Language Test for Children, to assess their performance at the dictation, sentence combination, adding/deducting redical, cloze and sentence making subtests. The results showed that except for the score of the sentence combining subtest, the score of children with ADHD was lower than the normal student in the rest of the subtests. Almost 60% of ADHD children's scores were below the 25th percentile numbers, but only 20% for normal children. Thus, writing problems were common for children with ADHD in Taiwan, too. First, children with ADHD performed worse than normal children on the dictation and cloze subtests, showing the weaker abilities of retrieving correct characters from their mental lexicon. Second, children with ADHD performed worse on the adding/deducting redical subtest than normal children did. Finally, at the language level, the score of children with ADHD on the sentence combination subtest was not lower than normal children, implicating their normal grammatic competence. It is worth mentioning that Taiwanese children with ADHD ignore the details of characters when they are writing, a finding that is common across languages.
39434683
Therapy-related leukemia cutis after adjuvant chemotherapy in a breast cancer patient.