Digital Commons Network^™

A Short Communication On Exploring The Rearing, Breeding, And Future Outlook Of Damani Sheep In Pakistan, Muhammad Jamil, Ashiq Saleem, Abdul Razzaq, Naveed Ahmed, Muhammad Faraz Ahsan, Mujeeb Ur Rehman, Irem Anwar, Faiqah Ramzan, Zaheer Ahmad, Abdurehman Ameen

Journal of Bioresource Management

The intentional production of animals is predicated on their genetic proficiency, which is dependent on optimal resource utilization and manipulation of biotic and abiotic environmental components to increase production for societal sustenance. The annual global consumption of sheep meat is approximately 2.5 kilograms per individual, out of a total of 41.6 kilograms. Three management systems are used to rear sheep: extensive wool and meat production, intensive milk production, and traditional pastoralism. Possessing adequate resources for sheep husbandry contributes to positive welfare outcomes. This review examined the rearing, breeding, and future potential of Damani sheep in Pakistan. Damani sheep are a …

Influence Of Municipal Solid Waste Dumpsite On Soil Physicochemical Properties And Vertical Distribution Of Heavy Metals, Chukwuebuka V. Azuka, Chikamso Ezeme

Journal of Bioresource Management

The management of municipal solid waste (MSW) through open dumping or open burning has been a very common practice in Nigeria. The work investigated the impact of these practices on soil physicochemical properties and the vertical distribution of heavy metals at two dumpsites at Obollo-Afor and Nsukka in Southeastern Nigeria. Soil samples were collected at 10 m apart at depths of 0-20, 20-40, 40-60 cm from the dumpsite and at 100 m away from the dumpsite for the determination of soil physicochemical properties. A profile pit was dug at the center of each dumpsite while soil sample collection was done …

Alpha Diversity And Species Status Of Uneven Forests In Eco-Zones Of Taraba State, Nigeria, Dau Henry Japheth, Joseph A. Ugbe, Jerry I. Alfa

Journal of Bioresource Management

Alpha diversity indices quantify the uncertainty in predicting the species identity of an individual. Quantitative indices on species composition and distribution are vital to understanding the trend and species status of an ecosystem for conservation management. However, among the forest ecosystems in Taraba state, Bakin Dutse and Wasaji uneven forests are one of the least studied areas, especially in terms of tree species status. This research work aims at assessing alpha diversity and species status of selected uneven forests in Taraba state, Nigeria; to provide baseline knowledge for conservation management. In total, 102 tree species from 74 genera and 41 …

Water Quality Of Madari Khal Tributary Of The Halda River, Chattogram, Bangladesh, Md. Shafiqul Islam, M.A. Azadi

Journal of Bioresource Management

Tidal canal Madari-Khal is one of the important tributaries of the river Halda, through which nearby hill stream water, agricultural washings, and effluents (treated or untreated) of Chattogram Asian paper Mill are drained to the Halda River. In this paper water quality and pollution level of Madari Khal are presented. A one-year study was conducted to ascertain the water quality and pollution level by using different physicochemical parameters i.e. Air temperature, Water temperature, Transparency, EC (Electrical Conductivity), TDS (Total Dissolved Solids), pH, DO (Dissolved Oxygen), freeCO₂, Ca⁺⁺ (Calcium), TH (Total Hardness), TA (Total Alkalinity), and Biological Oxygen …

Deleterious Heteroplasmic Mitochondrial Mutations Are Associated With An Increased Risk Of Overall And Cancer-Specific Mortality, Yun Soo Hong, Stephanie L Battle, Wen Shi, Daniela Puiu, Vamsee Pillalamarri, Jiaqi Xie, Nathan Pankratz, Nicole J Lake, Monkol Lek, Jerome I Rotter, Stephen S Rich, Charles Kooperberg, Alex P Reiner, Paul L Auer, Nancy Heard-Costa, Chunyu Liu, Meng Lai, Joanne M Murabito, Daniel Levy, Megan L Grove, Alvaro Alonso, Richard Gibbs, Shannon Dugan-Perez, Lukasz P Gondek, Eliseo Guallar, Dan E Arking

Faculty, Staff and Student Publications

Mitochondria carry their own circular genome and disruption of the mitochondrial genome is associated with various aging-related diseases. Unlike the nuclear genome, mitochondrial DNA (mtDNA) can be present at 1000 s to 10,000 s copies in somatic cells and variants may exist in a state of heteroplasmy, where only a fraction of the DNA molecules harbors a particular variant. We quantify mtDNA heteroplasmy in 194,871 participants in the UK Biobank and find that heteroplasmy is associated with a 1.5-fold increased risk of all-cause mortality. Additionally, we functionally characterize mtDNA single nucleotide variants (SNVs) using a constraint-based score, mitochondrial local constraint …

Microplastics In Marine Sediments From Dar Es Salaam Coast: Spatial Distribution And Characterization, Macarius P. Mtega, Matobola J. Mihale, Kessy F. Kilulya

Tanzania Journal of Science

The purpose of the research was to determine the spatial distribution and characterization of microplastics in marine sediments of beaches along the Indian Ocean of Dar es Salaam coast. The sediment samples were extracted in triplicate using floatation method followed by digestion of organic debris, then analyzed using At-FTIR spectrophotometer and stereomicroscope. The mean concentrations of microplastics for Kijichi Beach were 700 ± 907 particles/m2 at 1 cm, 859 ± 839 particles/m2 at 5 cm and 590 ± 782 particles/m2 at 10 cm; from Palm Beach were 157 ± 15 particles/m2 at 1 cm, 130 ± 182 particles/m2 at 5 …

Effects Of Game-Based Learning On Student Engagement And Academic Achievement Of Metabolism Of Biomolecules In The First Year Nursing Students, Aranya Boontham, Rossukon Charoensatsiri

Journal of Education Studies

Although the study of the metabolism of biomolecules is difficult, complicated and many students failed the exam, it is fundamental knowledge for first-year nursing students to understand and apply professionally in the future. This research used game-based learning to increase student engagement and learning outcomes for 150 first-year nursing students in Phrapokklao Nursing College, Chanthaburi. Several platforms and games were used to teach four chapters, including carbohydrate, lipid, protein and nucleic metabolism, with each chapter receiving 2 hours of classroom instruction in addition to self-study review. The research instruments consisted of measures of student engagement, pre-test and post-test assessments of …

Ochrobactrum, Bacillus And Enterobacter Isolates Of Hot Water Spring Augment The Growth Of Zea Mays Seedlings, Noor-E-Saba Naz, Rida Batool, Nazia Jamil

Journal of Bioresource Management

Hot springs situated at high altitudes is a kind of remarkable ecosystem for the exploration of microbial flora. It was hypothesized that hot springs can harbor bacteria with plant growth-promoting and exopolysaccharides (EPS) producing ability that can favour the growth of plants. For the investigation of this hypothesis, seven EPS producing bacterial isolates were isolated from a water sample of hot water spring of Tattapani, Azad Kashmir and characterized morphologically and biochemically. Three out of seven isolates (BE1, BN1 and BN3) showed significant production of EPS (14-15 mg / 100 ml). Growth kinetics study revealed that optimum EPS production was …

A Ck2 And Sumo-Dependent, Pml Nb-Involved Regulatory Mechanism Controlling Blm Ubiquitination And G-Quadruplex Resolution, Shichang Liu, Erin Atkinson, Adriana Paulucci-Holthauzen, Bin Wang

Faculty, Staff and Student Publications

The Boom syndrome helicase (BLM) unwinds a variety of DNA structures such as Guanine (G)-quadruplex. Here we reveal a role of RNF111/Arkadia and its paralog ARKL1, as well as Promyelocytic Leukemia Nuclear Bodies (PML NBs), in the regulation of ubiquitination and control of BLM protein levels. RNF111 exhibits a non-canonical SUMO targeted E3 ligase (STUBL) activity targeting BLM ubiquitination in PML NBs. ARKL1 promotes RNF111 localization to PML NBs through SUMO-interacting motif (SIM) interaction with SUMOylated RNF111, which is regulated by casein kinase 2 (CK2) phosphorylation of ARKL1 at a serine residue near the ARKL1 SIM domain. Upregulated BLM in …

Updates On The Immune Cell Basis Of Hepatic Ischemia-Reperfusion Injury, Mi Jeong Heo, Ji Ho Suh, Kyle L Poulsen, Cynthia Ju, Kang Ho Kim

Faculty, Staff and Student Publications

Liver ischemia-reperfusion injury (IRI) is the main cause of organ dysfunction and failure after liver surgeries including organ transplantation. The mechanism of liver IRI is complex and numerous signals are involved but cellular metabolic disturbances, oxidative stress, and inflammation are considered the major contributors to liver IRI. In addition, the activation of inflammatory signals exacerbates liver IRI by recruiting macrophages, dendritic cells, and neutrophils, and activating NK cells, NKT cells, and cytotoxic T cells. Technological advances enable us to understand the role of specific immune cells during liver IRI. Accordingly, therapeutic strategies to prevent or treat liver IRI have been …

Similarities And Differences In Vietnamese-Japanese Language And Culture: A Study On The Domain Of Words Indicating Kinship Relations From Role Schema Theory, Ly Thi Phuong Tran, Nhu Vo Tam Nguyen

Asia-Pacific Social Science Review

When it comes to the perception and processing of social information, role schema serves as a key concept in cultural linguistics, which processes information about the perception of humans to make sense of the complex world and society, information about people, social groups, and events; therefore, the theory is valuable in deciphering culturally constructed concepts with the full range of human experience expressed through the linguistic picture of each ethnic community. Recognizing that the hierarchical cultural characteristics of the two ethnic communities of Vietnam and Japan are most clearly shown through the kinship words in the family and display the …

Impact Of Perceived Environmental Restorativeness On Tourists’ Pro-Environmental Behavior: Examining The Mediation Of Place Attachment And The Moderation Of Ecocentrism, Bin Zhou, Luting Wang, Songshan Huang, Qihao Xiong

Research outputs 2022 to 2026

Guided by attention restoration theory and stimulus-organism-response (S-O-R) theory, we developed an integrated model to investigate the impact of perceived environmental restoration on forest park visitors' pro-environmental behavior through the mediation of place attachment. We further tested the moderating role of eco-centrism to provide theoretical and practical implications for the sustainability of tourism destinations and positive human-nature interactions. Using a sample of 504 visitors to a national forest park in China, our study indicated all three dimensions of environmental restorative perception (compatibility, extent, and away) positively influenced place attachment. Place attachment promoted pro-environmental behavior. Place attachment was an important mediator …

The Effect Of Risk Message Framing On Tourist Safety Behavior: A Heuristic-Systematic Model Perspective, Chaowu Xie, Lingling Fan, Jiangchi Zhang, Songshan Huang

Research outputs 2022 to 2026

This research examined the effect of pandemic risk message framing (amplifying vs. attenuating) on tourists' safety behavior from the perspective of heuristic-systematic information processing, as well as the roles of ontological security threat and public opinion climate of risk in moderating such effect. The results of two experiments showed that risk message framing had significant effects on tourists' heuristic processing and systematic processing, and systematic processing mediated the effect of risk message framing on tourists' safety behavior. Furthermore, ontological security threat and public opinion climate of risk strengthened tourists' heuristic processing of risk message; they also moderated the mediation effect …

Effects Of Bacillus Thuringiensis, Beauveria Bassiana, Neem, And A Tomato Inter-Crop On Diamondback Moth (Plutella Xylostella L.) (Lepidoptera: Plutellidae) In Tharaka-Nithi County, Kenya, Ceciliah N. Ngugi, Jesca N. Mbaka Mbaka, Hellen W. Muthengi

Tanzania Journal of Science

Cabbage (Brassica oleracea var. capitata) is an important crop in Kenya, ranked 3rd among the exotic vegetables. Diamondback moth (DBM) is a major cabbage pest that can cause a 100% loss in yield if not well managed. Farmers indiscriminately use synthetic pesticides associated with environmental, health, and pest resistance concerns to manage the DBM. To increase the availability of technologies for effective management of DBM in Kenya, three biopesticides; BioPower (Beauveria bassiana 1.0 x 108 CFUs/g), Dipel DF® (Bacillus thuringiensis subsp. kurstaki), Neemraj Super 3000 (Azadirachtin 0.3% EC), and a tomato inter-crop were evaluated. Cabbages (30 plants) spaced at 40 …

Spirulina (Arthrospira Fusiformis, Gomont 1892) As A High-Quality Feed Ingredient For Nile Tilapia Fingerlings, Angelina Michael, Margareth S. Kyewalyanga, Charles V. Lugomela

Tanzania Journal of Science

A partially randomized experimental design was conducted to evaluate the effect and potential of spirulina species (Arthrospira fusiformis) isolated from Momela Lakes, Tanzania, on the growth, antioxidant capacity, feed utilization, and body composition of Nile tilapia fingerlings. Five dietary treatments were formulated, including spirulina meal at 5%, 10%, and 15% of the total diets, as well as control diets with freshwater shrimp or Lake Victoria sardine. The protein content of the experimental diets was 25, 28, and 35% for a treatment containing spirulina at 5, 10, and 15% inclusion, respectively, while the control diets had 35% crude protein each. After …

Public Perceptions Of Water Quality In The Lake Bunyonyi Sub-Catchment, Western Uganda, Alex Saturday, Thomas J. Lyimo, Siajali Pamba, Susan Kangume, Jeniffer Turyatemba

Tanzania Journal of Science

Lake Bunyonyi ecosystem plays vital roles in water resource conservancy and tourism. Nevertheless, the rapid increase in human population and the unrelenting human activities are threatening the values, functions, and ecological integrity of the lake. In this study, the public perceptions of drinking water quality and its health implications in the Lake Bunyonyi Sub-catchment, Western Uganda are presented. A closed-ended questionnaire was administered to 267 respondents living within one Kilometre away from the lake shores. Besides, observation and interview methods were used to complement data collected by the questionnaire method. Results indicate that the prominent activities around the lake are …

Ethnobotanical Survey On The Knowledge And Use Of Medicinal Plants For Malaria Management Among University Students, Felista W. Mwingira, Deokary J. Matiya, Neema G. Mogha

Tanzania Journal of Science

Malaria remains a public health problem in Tanzania, escalated by the emergence of both parasite and vector resistance. Plant-based traditional medicines have been widely utilized as alternatives to malaria management. However, proper documentation is minimal, especially among the younger generation. This study assessed the knowledge of medicinal plants for malaria management among 532 Dar es Salaam University College of Education students. Overall, twenty-four plant species, most belonging to the family Asteraceae, were identified with Azaradichta indica being the most dominant species. These results reveal a substantial knowledge of medicinal plants for malaria management among university students.

An Overlapped Sub-Array Hybrid Beamforming Architecture With Successive Interference Cancellation And Water-Filling In Massive Mimo Systems, Godwin Mruma Gadiel

Tanzania Journal of Science

Over the years, wireless communication has significantly improved the data rate of mobile users. The key drive behind this success is the technological advancement in wireless communication. In the physical layer, hybrid beamforming has revolutionized the way signal reaches the user by constructively adding the signal at the destination thus improving the performance. Many researchers works have proposed different algorithms to solve for optimal hybrid beamforming. However, there is no single algorithm that can achieve both high spectral efficiency and energy efficiency at the same time. This work proposes a hybrid algorithm that combines successive interference cancellation and water filling …

Optical Characterization Of Photocatalytic Tungsten Oxide/Tin Oxide (〖Wo〗_3/〖Sno〗_2) Thin Films For Use In Degradation Of Water Pollutants, Victor Isahi, Christopher Maghanga, Mghendi Mwamburi, Onesmus Munyati, Sylvester Hatwaambo, Emmanuel Akoto, Wycliffe Isoe, Mir Waqas Alam

Tanzania Journal of Science

Organic pollutants in water have been a challenge and pose significant risks to human health. As a result, research efforts to eliminate these pollutants have been on the rise. Photocatalysis has shown incredible potential in water treatment containing organic pollutants since it is affordable and utilizes solar energy. Tin oxide ( ) has ardently been investigated as a photocatalyst for water treatment due to its remarkable properties such as; non-toxicity, and stability. However, its wide band gap and the tendency for some electrons and holes to recombine during its use have been cited to be among limiting factors affecting its …

Design Of A Cooling System Integrated With Ultraviolet Light For Preservation Of Fruits And Vegetables At Variable Tropical Weather Conditions: A Case Study Of Arusha, Tanzania, John Pyuza Gunda, Alexander Pogrebnoi, Baraka Kichonge

Tanzania Journal of Science

Post-harvest losses of fruits and vegetables pose significant challenges, especially in tropical climates. This study introduces the development and performance evaluation of a solar-powered evaporative cooling storage system integrated with ultraviolet light (UV) designed for preservation of perishable fruits and vegetables. The cooling chamber supplied with ultraviolet lamp was developed using locally available materials such as sisal, sponge, and bricks. The performance of the system was evaluated in terms of air temperature decrease, relative humidity increase, and evaporative cooling power capacity both for sunny and cloudy tropical weather conditions. The study reveals that activating the UV light considerably extends the …

Effective Enhancement Of Post-Harvest Tomato Storage Through Wrapping Using Deacetylated Chitin Nanofibril-Plasticized Honey Films, Ngesa Ezekiel Mushi, Edina Meela, Divina Kaombe

Tanzania Journal of Science

As one of the most grown seasonal fruit, tomato is widely consumed for making food products, drugs and ornaments. However, poor post-harvest handling system, transport and storage facilities deteriorate the quality of tomato fruits resulting into post-harvest losses. These problems have been addressed by the use of nanotechnology in this study. The combination of a chitosan surface and the core shell chitin results into novel deacetylated chitin nanofibril (DeChNF) with good biological activity and mechanical strength. The effectiveness of the DeChNF films for food preservation as an alternative material to chitosan is investigated. The DeChNF with degree of acetylation (DA) …

Yb-1 Transcription Factor Promotes Sorafenib Resistance In Liver Cancer, Kristopher L. Ezell, Omar Karkoutly, Sophia M. Leslie, D. Sudershan, Kyle Doxtater, Sudhir Kotnala, S. Lopez, Adithya Anilkumar, Sanjaya Satapathy, Vijian Dhevan, Subhash C. Chuahan, Manish Tripathi

Research Symposium

Background: Hepatocellular carcinoma (HCC) is a primary malignant liver tumor that commonly occurs as a progression of chronic liver inflammation. Sorafenib is the standard first-line systemic drug for advanced HCC, but the acquired resistance to sorafenib results in limited benefits. The mechanism underlying sorafenib resistance in HCC remains unclear. Recently, we have identified a multifunctional oncoprotein Y-box binding protein-1 (YB-1) that dysregulates a wide range of genes involved in drug resistance in other cancers and is responsible for increasing the IC-50 of sorafenib in HCC cell lines. In this study we will analyze the signaling pathways and genes regulated by …

Tuberculosis In Elderly Hispanics: Bcg Vaccination At Birth Is Protective Whereas Diabetes Is Not A Risk Factor, Julia M. Scordo, Genesis P. Aguillón-Durán, Doris Ayala, Ana P. Quirino-Cerrillo, Eminé Rodriguez-Reyna, Francisco Mora-Guzmán, Jose A. Caso, Eder Ledezma-Campos, Larry Schlesinger, Jordi B. Torrelles, Joanne Turner, Blanca I. Restrepo

Research Symposium

Background. Aging increases the risk of tuberculosis (TB) and its adverse outcomes, but most studies are based on secondary analyses, and few are in Hispanics. Diabetes is a risk factor for TB in adults, but its contribution in the elderly is unknown. We aimed to identify the role of diabetes and other risk factors for TB in elderly Hispanics.

Methods. Cross-sectional study among newly-diagnosed TB patients, recent contacts (ReC), or community controls (CoC) totaling 646 participants, including 183 elderly (>60 years; 43 TB, 80 ReC, 60 CoC) and 463 adults (18 to 50 years; 80 TB, 301 …

Understanding An Inflammatory Pathway In Diabetic Retinopathy, Reanna R. Rodriguez

Research Symposium

Diabetic Retinopathy (DR) is the leading cause of blindness in the U.S. However, not much is known of its molecular pathway and how it attributes to increases in inflammatory response in the eye. One avenue we will investigate is the transforming growth factor beta (TGFB) signaling pathway and its effect of vascular endothelial growth factor (VEGF) secretion and cell viability. VEGF is the hallmark that exacerbates DR progression in prolonged diabetes. Some major concern that have arisen are the underlying effects of oxidants and antioxidants in elevating VEGF secretion in diabetes. In attempt to learn more, we evaluated how an …

Trimeric Complex Interactions Of Antp-Tbp With Tfiieb And Exd Are Involved In The Genetic Control Of Drosophila Melanogaster, Gustavo Jiménez Mejía, Ruben De Jesus Montalvo Mendez, Claudia Dalila Altamirano Torres, Diana Reséndez Pérez

Research Symposium

Background: Homeoproteins are transcriptional factors (TFs) that shape animal body axes during development. These TFs are highly conserved and represent one of the most fascinating groups of regulatory molecules. Reports shown the multiplicity of interactions in hox proteins, as complexes trimeric involved to transcriptional activity. The study of trimeric complexes in Hox interactome will allow the better understanding of Hox genetic regulation during embryonic development.

Methodology: Using a new combination BiFCFRET approach performed in HEK293, the quantification was performed by FRETTY of ImageJ. Fly crosses were incubated at 25ºC on standard yeast-agar-cornmeal medium. Embryo cuticle preparations were carried out according …

Therapeutic Intervention Using Autologous Exosomes For Treatment Of Early-Stage Pancreatic Cancer, Saini Setua, Poornima Devi Shaji, Swathi Holla, Vincent P. Diego, Stephen W. Behrman, Murali M. Yallapu, Meena Jaggi, Subhash C. Chauhan, Sheema Khan

Research Symposium

Background: Pancreatic cancer (PanCa) is the third deadliest cancer in United States with a poor survival rate. Despite extensive research efforts, there is not any substantial progress in cancer therapeutics; major challenges lie with inherent drug toxicity, ineffectiveness, and resistance due to impediments against intracellular drug delivery. From a therapeutic delivery standpoint, novel delivery vehicles are required that are both biocompatible and non-immunogenic for a patient in order to maximize the chances of cure. This is possible by utilizing an autologous biological material, which can be applied as a personalized medicine to match the individual circumstances and molecular profile …

Therapeutic Efficacy Of Ormeloxifene Against Hepatocellular Carcinoma, Mohammed Sikander, M. Vela, Shabnam Malik, A. Rodriguez, A. Lopez, Daniel Zubieta, Fathi T. Halaweish, Subhash C. Chauhan

Research Symposium

Background: Hepatocellular carcinoma (HCC) is the most common primary liver cancer and leading cause of cancer related deaths worldwide. Severe toxicity and drug resistance to available chemotherapeutic agents display ineffective clinical response. Therefore, drug repurposing is gaining attention owing to their known biological activities and excellent safety profiles. Ormeloxifene (ORM), non-steroidal, selective estrogen receptor modulator (SERM), and exhibit diverse pharmacological activities. The aim of this study is to assess the therapeutic activity of ORM and to investigate the underlying molecular mechanism against hepatocellular carcinoma.

Objective: To investigate the therapeutic activity of ormeloxifene in human hepatocellular carcinoma cells. Methodology: MTT and …

The Role Of Zinc In Psd-95 Palmitoyl Modification, Luis F. Acosta, Lili Guerra, Safiya Syed, Ivonn Ruvalcaba, Yonghong Zhang, Xiaoqian Fang

Research Symposium

Postsynaptic density-95 (PSD-95) is a membrane-associated guanylate kinase that mediates localization of receptors in the excitatory postsynaptic density. It has been reported that PSD-95 mediates postsynaptic localization of NMDA receptors and anchors postsynaptic AMPAR receptors mainly through its postsynaptic membrane targeting by its N-terminal palmitoylation. Recent studies have shown that Ca2+/calmodulin blocks palmitoylation of PSD-95 by binding at the N-terminus of PSD-95, which promotes dissociation of PSD-95 from the postsynaptic membrane and causes loss of surface AMPARs in cultured neurons. Another metal ion zinc is found in various areas of the brain. As an endogenous neuromodulator, zinc plays a role …

The Impact Of Biological Sex On Motor Function And Responses To Novel Environments In The Gray Short-Tailed Opossum (Monodelphis Domestica), Esperanza I. Alaniz, Ismael Perez, Sasawan Heingraj, Katelynn Renteria, Cristian M. Botello, Joseph C. Cantu, John L. Vandeberg, Mario Gil

Research Symposium

Background: Understanding the different stress reactions in different environments can help us understand stress factors. Studying animal behavior is important for translational research for mental health improvement.

Previous literature has shown that stress is a risk factor for higher cancer incidence and poorer cancer survival. (Klejbor & Turlejski., 2012), as well as mental health outcomes. Understanding of how stress is related to cancer can help improve therapeutic outcomes as preventive measures (Glaser et al., 1987).

Methods: Using the Rota Rod apparatus, 12 animals (3 males, 9 females) were tested at 36 rpm for a maximum of 400 seconds (Madroñal et …

Tc-Ptp Overexpression Attenuates Skin Cancer Formation During Environmental Skin Carcinogenesis, Zahidur Rahmann, Carson Bogatto, Serena Olivarez, Dae Joon Kim

Research Symposium

Background: T-cell protein tyrosine phosphatase (TC-PTP), encoded by Ptpn2, has been shown to function as a tumor suppressor during skin carcinogenesis.

Methods: we generated a novel epidermal specific TC-PTP-overexpressing (K5HA.Ptpn2) mouse model to show that TC-PTP contributes to the attenuation of chemically induced skin carcinogenesis through the synergistic regulation of STAT1, STAT3, STAT5, and PI3K/AKT signaling.

Results: We found overexpression of TC-PTP increased epidermal sensitivity to DMBA-induced apoptosis and it decreased TPA-mediated hyperproliferation, coinciding with reduced epidermal thickness. Inhibition of STAT1, STAT3, STAT5 or AKT reversed the effects of TC-PTP overexpression on epidermal survival and proliferation. Mice overexpressing TC-PTP in …