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Fifth Street, TX, United States

The Texas Tech University Health science Center offers programs in Allied Health science, Biomedical science, Medicine, Nursing, and Pharmacy. TTUHSC's main campus is in Lubbock, but campuses are also located in Abilene, Amarillo, Dallas, El Paso and the Permian Basin. TTUHSC serves more than 100 counties in the western portion of Texas. The university is a separate but equal institution from Texas Tech University, and both universities are part of the Texas Tech University System. Wikipedia.


Gupta P.,Texas Tech University Health Sciences Center
BMC medicine | Year: 2012

HER2 is an oncogene, expression of which leads to poor prognosis in 30% of breast cancer patients. Although trastuzumab is apparently an effective therapy against HER2-positive tumors, its systemic toxicity and resistance in the majority of patients restricts its applicability. In this study we evaluated the effects of phenethyl isothiocyanate (PEITC) in HER2-positive breast cancer cells. MDA-MB-231 and MCF-7 breast cancer cells stably transfected with HER2 (high HER2 (HH)) were used in this study. The effect of PEITC was evaluated using cytotoxicity and apoptosis assay in these syngeneic cells. Western blotting was used to delineate HER2 signaling. SCID/NOD mice were implanted with MDA-MB-231 (HH) xenografts. Our results show that treatment of MDA-MB-231 and MCF-7 cells with varying concentrations of PEITC for 24 h extensively reduced the survival of the cells with a 50% inhibitory concentration (IC50) of 8 μM in MDA-MB-231 and 14 μM in MCF-7 cells. PEITC treatment substantially decreased the expression of HER2, epidermal growth factor receptor (EGFR) and phosphorylation of signal transducer and activator of transcription 3 (STAT3) at Tyr-705. The expression of BCL-2-associated × (BAX) and BIM proteins were increased, whereas the levels of B cell lymphoma-extra large (BCL-XL) and X-linked inhibitor of apoptosis protein (XIAP) were significantly decreased in both the cell lines in response to PEITC treatment. Substantial cleavage of caspase 3 and poly-ADP ribose polymerase (PARP) were associated with PEITC-mediated apoptosis in MDA-MB-231 and MCF-7 cells. Notably, transient silencing of HER2 decreased and overexpressing HER2 increased the effects of PEITC. Furthermore, reactive oxygen species (ROS) generation, mitochondrial depolarization and apoptosis by PEITC treatment were much higher in breast cancer cells expressing higher levels of HER2 (HH) as compared to parent cell lines. The IC50 of PEITC following 24 h of treatment was reduced remarkably to 5 μM in MDA-MB-231 (HH) and 4 μM in MCF-7 (HH) cells, stably overexpressing HER2. Oral administration of 12 μM PEITC significantly suppressed the growth of breast tumor xenografts in SCID/NOD mice. In agreement with our in vitro results, tumors from PEITC-treated mice demonstrated reduced HER2, EGFR and STAT3 expression and increased apoptosis as revealed by cleavage of caspase 3 and PARP. In addition our results show that PEITC can enhance the efficacy of doxorubicin. Our results show a unique specificity of PEITC in inducing apoptosis in HER2-expressing tumor cells in vitro and in vivo and enhancing the effects of doxorubicin. This unique specificity of PEITC offers promise to a subset of breast cancer patients overexpressing HER2. Source


Cardwell M.S.,Texas Tech University Health Sciences Center
Obstetrical and Gynecological Survey | Year: 2013

Stress-induced pregnancy complications represent a significant cause of maternal and perinatal morbidity and mortality due to preterm labor, low-birth-weight babies, pregnancy-induced hypertension, and neuropsychological developmental delays of affected offspring. Psychosocial factors such as socioeconomic status, work status, marital status, level of education, access to prenatal care, substance abuse, ethnicity, cultural background, and quality of relationships with partners and parents have been identified as determinants of stress during pregnancy. The biopsychosocial model of health and disease aptly explains the interactions of these psychosocial factors in the genesis of stress-induced pregnancy complications. Prenatal screening and intervention for relevant biopsychosocial risk factors may be useful in preventing stress-related perinatal complications.Target Audience: Obstetricians and gynecologists, family physiciansLearning Objectives: After completing this CME activity, physicians should be better able to describe how stress is manifested biologically, discuss stress and its impact from the biopsychosocial model of health and disease, recognize how stress may lead to pregnancy complications such as preterm labor, preeclampsia, and low-birth-weight infants, explain how stress may impact the neuropsychological development of children whose mothers experienced perinatal stress, and demonstrate how prenatal screening and appropriate interventions may reduce perinatal stress and associated pregnancy complications. © 2013 Lippincott Williams & Wilkins. Source


I hypothesize here that the ability of probiotics to synthesize neuroactive compounds provides a unifying microbial endocrinology-based mechanism to explain the hitherto incompletely understood action of commensal microbiota that affect the host's gastrointestinal and psychological health. Once ingested, probiotics enter an interactive environment encompassing microbiological, immunological, and neurophysiological components. By utilizing a trans-disciplinary framework known as microbial endocrinology, mechanisms that would otherwise not be considered become apparent since any candidate would need to be shared among all three components. The range of neurochemicals produced by probiotics includes neurochemicals for which receptor-based targets on immune and neuronal elements (intestinal and extra-intestinal) have been well characterized. Production of neurochemicals by probiotics therefore allows for their consideration as delivery vehicles for neuroactive compounds. This unifying microbial endocrinology-based hypothesis, which may facilitate the selection and design of probiotics for clinical use, also highlights the largely unrecognized role of neuroscience in understanding how microbes may influence health. Editor's suggested further reading in BioEssays Harvesting the biological potential of the human gut microbiome Abstract Probiotics are capable of producing neurochemicals such as acetylcholine or dopamine that may influence a human's gastrointestinal and psychological health by binding to receptors on immune and neuronal cells. © 2011 WILEY Periodicals, Inc. Source


Yeomans E.R.,Texas Tech University Health Sciences Center
Obstetrics and Gynecology | Year: 2010

Operative vaginal delivery remains a valid option when problems arise in the second stage of labor. The most common indications are fetal compromise and failure to deliver spontaneously with maximum maternal effort. There is a clear trend to choose vacuum extraction over forceps to assist delivery, but the evidence supporting that trend is unconvincing. Recent literature confirms some advantages for forceps (eg, a lower failure rate) and some disadvantages for vacuum extraction (eg, increased neonatal injury), depending on the clinical circumstances. To preserve the option of forceps delivery, residency training programs must incorporate detailed instruction in forceps techniques and related skills into their curricula. Simulation training can enhance residents' understanding of mechanical principles and should logically precede clinical work. © 2010 by The American College of Obstetricians and Gynecologists. Published by Lippincott Williams & Wilkins. Source


Ferrari R.,Texas Tech University Health Sciences Center
Neurobiology of aging | Year: 2012

Two recent genome-wide association studies (GWAS) for late onset Alzheimer's disease (LOAD) revealed 3 new genes: clusterin (CLU), phosphatidylinositol binding clathrin assembly protein (PICALM), and complement receptor 1 (CR1). In order to evaluate association with these genome-wide association study-identified genes and to isolate the variants contributing to the pathogenesis of LOAD, we genotyped the top single nucleotide polymorphisms (SNPs), rs11136000 (CLU), rs3818361 (CR1), and rs3851179 (PICALM), and sequenced the entire coding regions of these genes in our cohort of 342 LOAD patients and 277 control subjects. We confirmed the association of rs3851179 (PICALM) (p = 7.4 × 10(-3)) with the disease status. Through sequencing we identified 18 variants in CLU, 3 of which were found exclusively in patients; 8 variants (out of 65) in CR1 gene were only found in patients and the 16 variants identified in PICALM gene were present in both patients and controls. In silico analysis of the variants in PICALM did not predict any damaging effect on the protein. The haplotype analysis of the variants in each gene predicted a common haplotype when the 3 single nucleotide polymorphisms rs11136000 (CLU), rs3818361 (CR1), and rs3851179 (PICALM), respectively, were included. For each gene the haplotype structure and size differed between patients and controls. In conclusion, we confirmed association of CLU, CR1, and PICALM genes with the disease status in our cohort through identification of a number of disease-specific variants among patients through the sequencing of the coding region of these genes. Published by Elsevier Inc. Source

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