Monday, January 27, 2020

Fe-AZT and Pd-AZT Synthesis and Effects

Fe-AZT and Pd-AZT Synthesis and Effects Synthesis and Effects of Fe-AZT and Pd-AZT on Viability of Human Hepatocytes and Hepatocellular Carcinoma Cells Submitted by: Anna Harutyunyan Introduction Cancer is one of the major causes of mortality in the world. In 2015, according to the National Cancer Institute, over 1.6 million new cases of cancer were reported in the United States. The estimated cancer deaths for the year of 2015 were over 500,000. According to the National Cancer Institute projections, in 2016 an estimated 1.7 million new cases of cancer were diagnosed in the United States and 595,690 people will die from the disease (National Cancer Institute). Although new cancer treatments and therapies are designed and implemented every year, cancer is still the number two cause of mortality in the United States, therefore developing and testing new effective anticancer agents is crucial. Hepatocellular carcinoma (HCC) is one of the deadliest forms of cancers (Venook et al., 2010). The overall 5-year survival rate of HCC is less than 17%, making HCC the fastest rising cause of cancer related death in the United States (American Cancer Society 2016; Mittal and El-Serag, 2013). The annual age-adjusted incidence rates of HCC increased from 1.4 per 100,000 individuals in 1975-77 to 4.8 per 100,000 in 2005-07. An estimated 39,230 new cases of liver cancer (including intrahepatic bile duct cancers) were expected to occur in the US during 2016, approximately three-fourths of which would be hepatocellular carcinoma. An estimated 27,170 liver cancer deaths were expected in 2016 (American Cancer Society 2016). In 80-90% cases HHC occurs with and after cirrhosis. HCCs major risk factors are Hepatitis B and C viruses, cirrhosis, non-alcoholic fatty liver disease (NAFLD), overconsumption of alcohol and exposure to other carcinogenic substances (Mittal and El-Serag, 2013). Liver ca ncer is the sixth most common neoplasm and the third leading cause of cancer-related deaths, accounting for approximately 600,000 deaths annually (Venook et al., 2010). Because of early metastasis and progression, HCCs treatment is difficult, and traditional chemotherapy has shown limited success (Sabokrough et al, 2014). A research study published in 2015 suggested that an organometallic complex of platinum (II) azidothymidine (Pt (II)-AZT) has an antitumor effect on rat hepatocellular carcinoma cells. It was shown that this complex was significantly more effective in tumor suppression than the AZT without platinum (Sabokrough et al., 2014). Several organometallic complexes of AZT (with Zinc, Cobalt, Copper and Iron) were synthesized and characterized previously. The Iron complex of AZT (Fe-AZT) was shown to be the most stable (Shirvastav et al.) and have antimicrobial activity against 4 groups of bacteria. Electron rich ligands like AZT effectively bind and interact with metal ions producing metallodrugs which offer promising therapeutic application in terms of combating the drug-resistant strains of pathogens. It is also logical that a metal ion can influence the biological activity and therapeutic efficacy of the bio-molecule they bind (Shirvastav et al.) Thus it is useful to investigate the effect of a metal ion on the efficacy and mode of action of AZT in suppressing malignant cells and inducing apoptosis. To date, no research has been published regarding synthesis of Pd-AZT the inhibitory effect of both Fe-AZT and Pd-AZT on malignant cells. The aim of this research project is to synthesize Fe-AZT and Pd-AZT, confirm their structure and molecular mass and test their effects on viability of human hepatocellular carcinoma cells and normal human hepatocytes. Background Normal cell cycle In order to understand the biology of cancer it is crucial to understand the cell cycle of normal cells and cancerous cells. All cells in a given organism are under strict control of multiple regulatory agents, such as RB or p53 that control cell growth and keep the proliferative index stable. If there is a need for the cell to divide, the proliferative genes will turn on, or the suppressor genes that keep proliferation from occurring will be shut down, which will result in cell division (Hardin et al., 2014). The normal cell cycle consists of the following phases: G1, S, G2, M. During the G1 phase duplication of organelles, membrane systems and other important components happens. There is an important checkpoint at the end of this phase referred to as the restriction checkpoint, which verifies that DNA synthesis was successful and no errors have been detected. Next is the S phase during which the cell duplicates each chromosome. During the G2 the rest of the components that were not synthesized in the G1 phase are synthesized. A checkpoint after this phase makes sure the cell is ready to divide, and no errors in chromosome duplication were made. Mitosis is the next phase, when the cell physically divides (cytokinesis) making two identical daughter cells. A checkpoint during this phase checks if both of the daughter cells received the correct number of chromosomes. After division, the cell may remain in its silent G0 phase, when it does not divide, but continues to function. If any errors are detected on any of the checkpoints, the cell cycle is put on hold and the cell will undergo apoptosis. This process is governed my many enzymes and complexes, and theoretically, malfunction of any of these enzymes may result in uncontrolled cell division/proliferation. This can be the onset of carcinogenesis. Figure 1. The cell cycle phases with their checkpoints. Cancer cell cycle It is important to note that the normal cell cycle is under control of thousands of regulatory elements that are coded for by different genes. If mutations occur in the genes that code for the key elements keeping cell proliferation at bay, one level of control over the cell cycle is lost. There are cell signaling mechanisms through which immune cells detect faulty cells, send them death signals and the faulty cell undergoes apoptosis. It takes more than one mutation for a normal cell to start behaving like a cancer cell. Usually it is either the loss of the function of suppressor genes, or overexpression of proliferative genes that result in uncontrolled cell proliferation. When the cell becomes malignant, it loses the ability to respond to death signals, thus does not undergo apoptosis. The malignant cell cycle is slower than the normal cell cycle, however, since the cancer cells keep dividing and do not die, their number grows exponentially resulting in tumors (Weinberg, 2014). There is distinct cytological difference between normal and cancer cells (Figure 2). A normal cell has a smaller, regularly shaped nucleus, a low nucleus/cytoplasm ratio, is well differentiated and has well defined borders. Cancer cells have larger, irregularly shaped nucleus, high nucleus/cy toplasm ratio, are less differentiated and have irregular borders. In contract with normal cells that adhere to each other, cancer cells are less adhesive and break away from each other (Weinberg, 2014). Figure 2. The comparison of the cytology of normal cells and cancer cells. Azidothymidine (AZT), Fe(III)AZT, Pd(II)AZT Azidothymidine (AZT, Zidovudine) is a thymidine derivative in which the 3-hydroxy group is replaced by an azido group (Figure 3). It has been shown to have antitumor effects on different animal carcinoma cells both in vitro and in vivo through inhibition of telomerase activity and by causing cell cycle arrest (Gomez et al., 2012; Hadizadeh et al., 2014, Cooper and Lovett, 2011; Matteucci et al., 2015). Figure 3. Thymidine (left), Azidothymidine (right). Since cancer cells have higher proliferation rate than normal cells, their thymidine turnover rate is higher, which could contribute to their increased sensitivity to AZT. Several studies conducted by Fang et al., have shown that a hepatocellular carcinoma cell line (HepG2) is significantly more sensitive to AZT toxicity as compared to the normal hepatocyte (THLE2) sensitivity (Fang et al., 2014; Fang and Beland, 2009). The current hypothesis on how AZT affects the cell suggests that AZT is phosphorylated intracellularly yielding AZT-triphosphate and AZT-monophosphate. The AZT-monophosphate can be incorporated into the DNA structure instead of thymidine due to its similar molecular structure and shape. However, in contrast with thymidine, AZT lacks the 3 hydroxyl group which is the group that forms phosphodiester bonds between nucleotides in the DNA backbone structure. This means, wherever the AZT phosphate is incorporated in one of the DNA strands during DNA replication, the elongat ion of that strand halts (Figure 4). This is one of the mechanisms through which AZT causes damage to DNA (Fang et al, 2014). The commercial name of AZT is Zidovudine, and it is the basis of AIDS treatments. AZT blocks the replication of HIV-1 virus by competitively inhibiting the viral reverse transcriptase (RT). In other words, HIV RT prefers AZT to normal nucleotides. As described above, AZT is phosphorylated to AZT-triphosphate and is incorporated into viral DNA, halting nucleotide chain elongation. It is also known that AZT-triphosphate can be incorporated into eukaryotic DNA, although its affinity for DNA polymerases is lower than that for RT (Gomez et al, 2012). It was shown that Pt(II)-AZT is more effective in suppressing cancer cells than AZT, thus it has been suggested that having a transition metal bound to the central nitrogen atom of the azido group increases the complexs affinity for G-C and A-T base pairs and the P-backbone of DNA (Das and Pitre, 2007; Sabokrouh et al, 2015). Materials and Methods Fe-AZT and Pd-AZT synthesis To carry out the synthesis of Pd and Fe complexes, solid AZT and a standard ion solution of each metal (iron nitrate nonahydrate (Fe(NO3)3 ·9H2O and palladium chloride (PdCl2)) will be purchased from Sigma Aldrich (St. Louis, MO). Synthesis will be performed according to the protocol by Das and Pitre (2007). A 1:1 molar ratio of aqueous solution of AZT and metal ion will be refluxed for 3 hours. The volume of the reaction mixture will be reduced by 75% in order for the complex to precipitate. The solid product will be vacuum filtered, washed twice with ice-cold water, recrystallized and air-dried overnight. Infrared absorbance spectra will recorded for the AZT, Fe-AZT and Pd-AZT complexes. In the experiment conducted by Das and Pitre (2007) the comparison of IR spectra of pure AZT and its complex with Fe, the spectrum indicated a shift in bands from 2170 to 2150 cm-1 due to complexation through N atom of azido group. A similar band shift in the IR spectrum of Fe-AZT and Pd-AZT is expected. A Matrix Assisted Laser Ioniation/Distortion Time-of-Flight (MALDI TOF) mass spectrometry analysis will be performed for the Fe-AZT and Pd-AZT to determine the molar mass and the stoichiometry of the complexes. The matrix for analysis will be composed of 1:1 saturated Anthranilic Acid and Nicotinic Acid (Sigma Aldrich, St. Louis, MO). The samples and matrix will be dissolved in 45% acetonitrile: 55% water (van Kampen et al., 2004). Cell cultures HepG2, THLE2. Liver carcinoma cell line HepG2 and normal human liver cell line THLE2 will be obtained from American Type Culture Collection (Manassas, VA). The standard protocol recommended by ATCC will be used for establishing and maintaining hepatic cell lines. The cell lines will be plated at a density of 5 x 103 cells/cm2. HepG2 cells will be cultured in DMEM with 10% fetal bovine serum and antibiotics (penn/strep). THLE2 cells will be cultured in LHC-8 medium with 70ng/ml phosphoethanolamine, 5ng/ml epidermal growth factor, 10% fetal bovine serum and antibiotics (Fang et al., 2009). After ensuring sufficient cell growth and several passages of each cell line, the two cell lines will be divided into 4 groups each: control (no treatment) and treated with each drug: AZT, Fe-AZT and Pd-AZT (Table 1). Table 1. The experimental setup of the control and experimental groups of cells. Control 1 (C1) THLE2 cell line (no treatment) Control 2 (C2) HepG2 cell line (no treatment) Experimental 1 (E1) THLE2 cell line+AZT Experimental 2 (E2) HepG2 cell line+AZT Experimental 3 (E3) THLE2 cell line+Fe-AZT Experimental 4 (E4) HepG2 cell line+Fe-AZT Experimental 5 (E5) THLE2 cell line+Pd-AZT Experimental 6 (E6) HepG2 cell line+Pd-AZT The cells in the treated groups will be further categorized by the concentrations of the drug. HepG2 cells will be incubated with 2, 20 or 100  µM aqueous solution of AZT, Fe-AZT or Pd-AZT for 14 days. THLE2 cells will be incubated with 50, 500 or 2500  µM aqueous solution of AZT, Fe-AZT or Pd-AZT for 14 days. Each group of cells will be seeded at 5 x 103 cells/cm2 density in 6-well plates. The cells will be passaged weekly during the two-week treatment period. The dosage and incubation time were chosen based on a similar study (Fang et al., 2013; Matteucci et al., 2015; Sabokrouh et al., 2015). Cell viability assay After 14-day treatment period, 103 106 cells from each group will be seeded in a 96-well plate, incubated for 4 hours, and treated with MTT reagent, followed by a 8-12 hours incubation at 37 °C. After the incubation with MTT, when the cells have metabolized the yellow tetrazolium dye (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide) to purple formazan, the cells will be treated by a detergent to release the formazan into the solution, and the absorbance will be measured at 570nm using an ELIZA reader. The number of metabolically active cells will be determined using a previously made calibration curve. The statistical differences will be calculated using a Two-Way ANOVA and Tukeys Post-Hoc Test. Anticipated outcomes. The expected mass-to-charge ratio from mass spectrometry analysis of Fe-AZT complex is 323.1, that of Pd-AZT is 373.6. Based on the published literature and the adopted hypothesis, all three drugs are expected to decrease cell viability. The concentration of either drug should have positive correlation with decrease in cell viability. Based on previous observations, it is expected that the HepG2 cells will be significantly more sensitive to both complexes, thus will be significantly less viable after the treatment compared to the THLE-2 cells. Study Participants and Timeline Anna Harutyunyan is the primary author of this study. She is currently a senior biology and chemistry major at Wilson College. This project will serve as Annas senior research project. She will conduct the research and present the results with the supervision of her advisors Dr. Deborah S. Austin (Sponsoring PAS member) and Dr. M. Dana Harriger (PAS Member). The research study began in September 2016 and will be completed by April 2017. Annas research findings will be analyzed and written as her senior thesis. Anna will also present her findings at the 2017 Pennsylvania Academy of Science meeting and at the Wilson College research colloquium. Budget Item Price MTT Assay Kit (ThermoFisher) $235.00 Zidovudine (Sigma) $124.00 LHC-8 medium (Gibco) $140.00 Total $499.00 Facilities and Equipment The MALDI TOF mass spectrophotometer will be provided by Pennsylvania State College of Medicine Mass Spectrometry Facility under supervision of Bruce Stanley, PhD. All materials, other instruments, and equipment not listed, including cell culture media and supplies, will be provided by the Department of Physical and Life Science of Wilson College. References       American Cancer Society. Cancer Facts Figures 2016. Atlanta: American Cancer Society; 2016. Bilsland AE, Stevenson K, Liu Y, Hoare S, Cairney CJ, Roffey J, et al. (2014) Mathematical Model of a Telomerase Transcriptional Regulatory Network Developed by Cell-Based Screening: Analysis of Inhibitor Effects and Telomerase Expression Mechanisms. PLoS Comput Biol 10(2): e1003448. doi:10.1371/journal.pcbi.1003448 BIOL2060 Cell Cycle [Photograph found in Department of Biology Memorial University of Newfoundland]. (2015). In Hardin Bertoni (Authors). Retrieved March 30, 2016, from http://www.mun.ca/biology/desmid/brian/BIOL2060/BIOL2060-19/CB19.html Chen, Yi-Bin. Liver Cancer Hepatocellular Carcinoma: MedlinePlus Medical Encyclopedia. U.S National Library of Medicine. U.S. National Library of Medicine, 1 Aug. 2015. Web. 10 Apr. 2016. Cooper, D. L., Lovett, S. T. (2011). Toxicity and tolerance mechanisms for azidothymidine, a replication gap-promoting agent, in Escherichia coli. DNA Repair, 10(3), 260-270. http://doi.org/10.1016/j.dnarep.2010.11.007 Das, R., Pitre, K. S. (september 2007). Bioinorganic studies on Fe (II)- zidovudine (azt) complex. Indian Journal of Chemical Technology, 14, 526-528. Retrieved February 20, 2016. Fang, J.-L., Beland, F. A. (2009). Long-Term Exposure to Zidovudine Delays Cell Cycle Progression, Induces Apoptosis, and Decreases Telomerase Activity in Human Hepatocytes. Toxicological Sciences, 111(1), 120-130. http://doi.org/10.1093/toxsci/kfp136 Fang, J., Han, T., Wu, Q., Beland, F., Chang, C., Guo, L., Fuscoe, J. (2014). Differential gene expression in human hepatocyte cell lines exposed to the antiretroviral agent zidovudine. Archives Of Toxicology, 88(3), 609-623. doi:10.1007/s00204-013-1169-3 Gomez, D. E., Armando, R. G., Alonso, D. F. (2012). AZT as a telomerase inhibitor. Frontiers in Oncology, 2, 113th ser. Retrieved March 11, 2016, from http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3434370/ Hadizadeh, S., Najafzadeh, N., Mazani, M., Amani, M., Mansouri-Torshizi, H., Niapour, A. (2014). Cytotoxic Effects of Newly Synthesized Palladium(II) Complexes of Diethyldithiocarbamate on Gastrointestinal Cancer Cell Lines. Biochemistry Research International, 1-9.doi:10.1155/2014/813457 Hardin, J., Bertoni, G., Kleinsmith, L. J., Becker, W. M. (2014). Beckers world of the cell (8th ed.). Boston: Benjamin Cummings. Harrington, J. A., Reardon, J. E., Spector, T. (1993). 3-azido-3-deoxythymidine (AZT) monophosphate: an inhibitor of exonucleolytic repair of AZT-terminated DNA. Antimicrobial Agents and Chemotherapy, 37(4), 918-920. van Kampen Jeroen J.A., Fraaij Pieter L.A., Vishal Hira, van Rossum Annemarie M.C., Hartwig, Nico G., de Groot Ronald, Luider Theo M.. A new method for analysis of AZT- triphosphate and nucleotide-triphosphates. Biochemical and Biophysical Research Communications, Volume 316, Issue 3, 9 April 2004, 151-159] Matteucci, C., Minutolo, A., Marino-Merlo, F., Grelli, S., Frezza, C., Mastino, A., Macchi, B. (2015). Characterization of the enhanced apoptotic response to azidothymidine by pharmacological inhibition of NF-kB. Life Sciences, 127, 90-97. doi:10.1016/j.lfs.2015.01.038 Mittal, S., El-Serag, H. B. (2013). Epidemiology of HCC: Consider the Population. Journal ofClinical Gastroenterology, 47(0), S2-S6.http://doi.org/10.1097/MCG.0b013e3182872f29 National Cancer Institute. (n.d.). Surveillance, Epidemiology, and End Results Program. Retrieved February 16, 2016, from http://seer.cancer.gov/statfacts/html/all.html Neto, V. (2013, January). AZT action [Photograph found in Organic Chemistry]. Retrieved April 1, 2016, from http://wwwblogvine.blogspot.com/2013/01/azt-was-originally-intendedto- treat.html (Originally photographed 2013, January 20) Normal And Cancer Cells Structure [Photograph found in Cells or Tissue Abnormal Cells or Tissue Cells or Tissue Normal Cells or Tissue Historical Graphics, National Cancer Institute]. (2001, January 1). In P. Kenny (Illustrator). Retrieved April 1, 2016, from https://visualsonline.cancer.gov/details.cfm?imageid=2512 (Originally illustrated 1990, April) Pichard, L., Raulet, E., Fabre, G., Ferrini, J. B., Ourlin, J. C., Maurel, P. (2006, February). Human hepatocyte culture. Retrieved March 11, 2016, from https://www.researchgate.net/publication/7063976_Human_hepatocyte_culture Sabokrouh, A., Vaisi-Raygani, A., Goodarzi, M. T., Khatami, S., Taghizadeh-jahed, M., Shahabadi, N., à ¢Ã¢â€š ¬Ã‚ ¦ Shakiba, Y. (2015). Comparison between Platinum-Azidothymidine and Azidothymidine Effects on Bcl-2 and Telomerase Gene Expression in Rats with Hepatocellular Carcinoma. Avicenna Journal of Medical Biotechnology, 7(2), 50-56. Sabokrouh, A., Goodarzi, M. T., Vaisi-Raygani, A., Khatami, S., Taghizadeh-Jahed, M. (2014). Effects of Treatment with Platinum Azidothymidine and Azidothymidine on Telomerase Activity and Bcl-2 Concentration in Hepatocellular Carcinoma-Induced Rats. Avicenna Journal Of Medical Biotechnology, 6(4), 200-209. Telomere Shortening Determines the Proliferative Lifespan of Human Diploid Fibroblasts. 2001. Nature Reviews. By Nicole F. Mathon and Alison C. Lloyd. Web. 21 Mar. 2016. ThermoFisher Scientific. (n.d.). MRNA Extraction. Retrieved March 11, 2016, from https://www.thermofisher.com/us/en/home/life-science/dna-rna-purification-analysis/rna- extraction/rna-types/mrna-extraction.html Venook, A. P., Papandreou, C., Furuse, J., De Guevara, L. L. (2010). The Incidence and Epidemiology of Hepatocellular Carcinoma: A Global and Regional Persprective. The Oncologist, 4(15), 5-13. Retrieved March 11, 2016, from http://theoncologist.alphamedpress.org/content/15/suppl_4/5.long Weinberg, Robert A. The Biology of Cancer. 2nd ed. New York, NY: Garland Science, 2014. Print.

Saturday, January 18, 2020

International Business Essay

What is e-Bay’s core competency? How does it relate to its chosen strategy? e-Bay’s competencies lie in its software, which allows people to trade with little supervision. It also has competencies in dispute resolution, an automated item listing service, an online financial service and a communications platform. The integration of these allow e-Bay to have a more efficient and effective trading tool used and policed by the buyers and sellers in the site. What are the implications to the challenges identified in the case regarding e-Bay’s strategy today and the future? The challenge on translation software has the least amount of impact considering that even the users of the site are content with â€Å"pretty good.† An improvement in this area though, would make the service more reliable. Government regulation challenges are perhaps one of the most difficult. With new laws constantly passed in countries, some laws that touch on trade could prove a hindrance to e-Bay’s expansion and could restrict their operations. Unless the world becomes more open to the flow of goods, then e-Bay would constantly face problems. The digital divide is a less serious problem. With technology catching up to many countries and becoming more available and cheaper, it is only a matter of time before the internet becomes available to poor communities. Cultural attributes is one of the most problematic. Since beliefs take so much time to shape and that reactions are unpredictable, it is important for e-Bay to be able to make their strategies localized and adapt it to the current system. Finally, international expansion is an unpredictable challenge, but could prove successful if their users continue to support and trust the company for their trading needs. Which candidate should the committee nominate for the assignment? Why? The first choice would be Brett Harrison because of his experience in running line activities and supervisory staff and being rated as an excellent worker. More importantly, he has knowledge about the country which is one of the most important things in running the operations of the company there. If he doesn’t agree because of familial considerations, then, Ravi Desai should take his place, not only because of his knowledge of the country but also because he has experience in handling large operations. Should all the candidates receive the same compensation package? If not, which factors influence each package? The candidates should all receive the same principle in their compensation package: a common basic salary and a bonus dependent on their performance and contributions to the company.

Friday, January 10, 2020

Hamlet Act 5 Scene 5 Analysis Essay

Give me your pardon, sir. I’ve done you wrong. But pardon ’t, as you are a gentleman. †¦Ã¢â‚¬ ¦ That I have shot mine arrow o’er the house And hurt my brother. Since Hamlet somehow knows this fencing fight is not only a simple competition between him and Laertes, Hamlet understands that why Laertes needs to fight with him, which because Hamlet killed Polonius, who is Laertes` father, by accidentally. â€Å"I here proclaim was madness.† In terms of anagorisis, Hamlet tells Laertes that the murder was not done by Hamlet`s consciousness, but rather by his madness. In addition, this is the first time in the whole play since Hamlet knows the truth from the ghost and he acts straight, Hamlet convince that he is mad and acts stupidly (killed Polonius) consequently. Hamlet hopes that Laertes can understand it is not Hamlet`s fault or guilty of killing Polonius and removes himself from the responsibility. â€Å"If’t be so, Hamlet is of the faction that is wronged.† In terms of metaphor/personification, Hamlet indicates that he is the victim of his mental illness so that he was controlled by it and killed Polonius. â€Å"His mad ness is poor Hamlet’s enemy.† In terms of personification/analogy, for Hamlet, he thinks he is not the one who should be blamed or punished rather his madness should be blamed as Hamlet`s enemy. â€Å"Let my disclaiming from a purposed evil Free me so far in your most generous thoughts That I have shot mine arrow o’er the house And hurt my brother.† In terms of analogy, Hamlet hints at Polonius` spying in Gertrude`s closet when Hamlet killed him by using â€Å"a purposed evil† and describes Polonius was accidental killed by him by using â€Å"I have shot mine arrow o’er the house And hurt my brother†, which â€Å"the house† means Gertrude`s closet. Originally, Hamlet thought the guy who hid behind the curtain was Claudius, and Hamlet promised that if Claudius has done something badly, he must kill Claudius. However, he did not know the guy behind the curtain was Polonius instead of Claudius. Plus his madness, he killed Polonius immediately by mistake, which it is the same as  shoots a narrow and accidentally hurts Laertes (because Polonius died). Overall, in this soliloquy, Hamlet basically apologizes for how he has hurt Laertes, but agrees to the fight anyway because he is using it as his reason to murder Claudius to get his revenge.

Thursday, January 2, 2020

Overview of Child Abuse - 1989 Words

A 19-year-old new mother, named Sheryl asked her boyfriend to watch her 8-month-old baby while she went shopping. Her boyfriend kindly agreed assuming that the baby would fall asleep, and he would continue watching the game. However like most newborn babies, Sheryl’s child was a little fussy and was crying. That caused Sheryl’s boyfriend to get annoyed and agitated. He went over to the baby, picked him up and shook him hard. When Sheryl came home she found her baby injured, unfortunately what happened to Sheryl’s baby it’s something that happens to many children in America every day. Child abuse is a very serious issue, that I believe has been neglected and we as a society haven’t done enough to protect these children. In this essay I†¦show more content†¦They can also be due to stabbing, kicking, shaking, and chocking. Physical abuse is the most common type of abuse. Physical abuse is very dangerous to newborns and children between the age s 1-5, because at that time children are not fully developed, both physically and mentally. Studies show that some parents’ especially new parents, who don’t want the child, get really frustrated and don’t realize or don’t care to realize, the amount of harm that they are causing. Shaking a child is one of the most common ways, which newborn babies or young children die. Shaking a child can cause brain damage, and internal bleeding. There have been discussions weather spanking is abuse, or just discipline. Many parents, actually about 80% of Americans don’t think there is anything wrong with spanking their children. That they believe, spanking to be an efficient and appropriate way of punishment. However many studies show that spanking isn’t an efficient way to punish a child that it just installs fear, and the child grows up believing that violence is the answer, that it is ok to use physical force when you see fit. Outlawing spanking in the United States would be very beneficial to both parents and children. Firstly it would save the lives of many children each year, but most importantly it would break this vicious cycle between people; this cycle that we as people feel the need to use violence in our daily lives to fix situations. Other countries, have outlawedShow MoreRelatedOverview and Effects of Child Abuse Essay1805 Words   |  8 PagesChild abuse in American today is amongst the most saddened topics of mankind. Many children are subjected to neglect and abuse on a daily basis. The sex and age of child makes no difference when it comes to child abuse.. Boys and girls are equally likely to suffer maltreatment. The problem is how often child abuse goes unreported. 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