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Fulltext (R)-(+)-α-lipoic acid protected NG108-15 cells against H₂O₂-induced cell death through PI3K-Akt/GSK-3β pathway and suppression of NF-κβ-cytokines

Kamarudin MN, Mohd Raflee NA, Hussein SS, Lo JY, Supriady H, Abdul Kadir H

Drug Des Devel Ther, 2014;8:1765-80.
PMID: 25336920 DOI: 10.2147/DDDT.S67980

Alpha-lipoic acid, a potent antioxidant with multifarious pharmacological benefits has been reported to be neuroprotective in several neuronal models and used to treat neurological disorders such as Alzheimer's disease. Nonetheless, conclusive mechanisms of alpha-lipoic acid for its protective effects particularly in NG108-15 cells have never been investigated. In this study, the intricate neuroprotective molecular mechanisms by (R)-(+)-alpha-lipoic acid (R-LA) against H2O2-induced cell death in an in vitro model of neurodegeneration were elucidated. Pretreatment with R-LA (2 hours) significantly increased NG108-15 cell viability as compared to H2O2-treated cells and mitigated the induction of apoptosis as evidenced by Hoechst 33342/propidium iodide staining. R-LA (12.5-50 μM) aggrandized the reduced glutathione over glutathione disulfide ratio followed by a reduction in the intracellular reactive oxygen species level and an increase in mitochondrial membrane potential following H2O2 exposure. Moreover, pretreatment with R-LA stimulated the activation of PI3K-Akt through mTORC1 and mTORC2 components (mTOR, rictor and raptor) and production of antiinflammatory cytokine, IL-10 which led to the inactivation of glycogen synthase kinase-3β (GSK-3β) and reduction of both Bax/Bcl2 and Bax/Bcl-xL ratios, accompanied by inhibition of the cleaved caspase-3. Additionally, this observation was preceded by the suppression of NF-κβ p65 translocation and production of proinflammatory cytokines (IL-6 and TNF-α). The current findings accentuate new mechanistic insight of R-LA against apoptogenic and brain inflammatory factors in a neuronal model. These results further advocate the therapeutic potential of R-LA for the treatment of neurodegenerative diseases.

Matched MeSH terms: Cell Death/drug effects
A 15-year study of death in custody in Tuanku Ja'afar Hospital Seremban

Mahamad Arif ANF, Syed Alwee Al'aidrus SS, Shafee MS, Mohd Nor F

Malays J Pathol, 2021 Aug;43(2):303-310.
PMID: 34448794

Death-in-custody refers to the occurrence of death, while a person is under the custody of any enforcement agency. Their incidence often creates overwhelming public and media attention. Currently, there is no standardised definition of 'death-in-custody' in Malaysia and internationally. A crosssectional descriptive study was performed in the Department of Forensic Medicine Hospital Tuanku Ja'afar Seremban (HTJS) for a period of 24 months. Information on all custodial deaths registered at HTJS from January 2001 till December 2015 was selected from the in-house hospital death registration system. The definition of 'death-in-custody' used was guided by the recommendation by the 'Australian Royal Commission into Aboriginal Deaths in Custody' 1991 with few adjustments. Four custodial settings of interest (the police, prison, immigration depot for the illegal immigrant, and army custody) were studied. A total of 172 deaths-in-custody were collected, in which the majority of cases were natural deaths (84.88%), predominantly infective in nature (65.07%). Less than 1/6th of cases were unnatural deaths with more than 80% died from legal intervention. All custodial deaths were dominated by males (96.51%) with a mean and median age of 37 years. In terms of nationality, 52.91% of the deaths involved Malaysian citizens in which the 'Malay/Bumi' race outnumbered the other two main races. The most documented custodial deaths occurred in prison (44.19%) followed by immigration depots (38.37%) and police lock-ups (17.44%). This study provides a general overview of the pattern including the causes and the demographic profile involving death in custody in the Seremban district registered at HTJS.

Matched MeSH terms: Cause of Death
Fulltext A 2-year study of neonatal mortality in a large Malaysian hospital

Boo NY, Nasri NM, Cheong SK, Sivamohan N

Singapore Med J, 1991 Apr;32(2):142-7.
PMID: 2042076

A 2-year study was carried out in the Maternity Hospital, Kuala Lumpur to determine the neonatal mortality rates. This Hospital functions both as the local service centre as well as the national referral centre in Malaysia. Its neonatal services, however, were equipped and manned at those below Level III perinatal centre. During the study period 52, 877 livebirths took place in the Hospital. In 1987 and 1988 respectively, the low birthweight (less than 2500 gm) rates were: 112.8 and 101.9 per 1000 livebirths, very low birthweight (less than 1500 gm) rates: 11.1 and 8.8 per 1000 livebirths, neonatal mortality rates: 12.5 and 10.7 per 1000 livebirths and neonatal mortality risk ratio: 1.15 and 1.27. There was significant difference in mortality rates among the Malay, Chinese and Indian babies born in this hospital: the Indians had the highest and the Chinese the lowest rates. Babies delivered by breech or lower segment Caesarean section (LSCS) also had significantly higher mortality than those delivered by other modes of delivery. Low birthweight neonates constituted less than 45% of the total special care nursery admission but contributed to more than 70% of the total neonatal deaths. The common causes of neonatal deaths were problems of prematurity, infection, asphyxia and congenital malformations. Preterm and low birthweight neonates died primarily from problems of prematurity or infection. Term and larger neonates died mainly from asphyxia. More than 75% of the neonatal deaths occurred before 7 days of life. Improvement of antenatal care in the community and upgrading of perinatal services in this Hospital could help to lower the morbidity and mortality due to preventable causes.

Matched MeSH terms: Cause of Death
A CONCEPT IN THE MANAGEMENT OF TWIN DELIVERY

MARZUKI A

Med J Malaysia, 1963 Jun;17:288-91.
PMID: 14060506
Matched MeSH terms: Fetal Death*
A Coxsackievirus B1-mediated nonlytic Extracellular Vesicle-to-cell mechanism of virus transmission and its possible control through modulation of EV release

Jorfi S, Ansa-Addo EA, Mariniello K, Warde P, Bin Senian AA, Stratton D, et al.

J Gen Virol, 2023 Sep;104(9).
PMID: 37665326 DOI: 10.1099/jgv.0.001884

Like most non-enveloped viruses, CVB1 mainly uses cell lysis to spread. Details of a nonlytic virus transmission remain unclear. Extracellular Vesicles (EVs) transfer biomolecules between cells. We show that CVB1 entry into HeLa cells results in apoptosis and release of CVB1-induced 'medium-sized' EVs (CVB1i-mEVs). These mEVs (100-300 nm) harbour CVB1 as shown by immunoblotting with anti-CVB1-antibody; viral capsids were detected by transmission electron microscopy and RT-PCR revealed CVB1 RNA. The percentage of mEVs released from CVB1-infected HeLa cells harbouring virus was estimated from TEM at 34 %. Inhibition of CVB1i-mEV production, with calpeptin or siRNA knockdown of CAPNS1 in HeLa cells limited spread of CVB1 suggesting these vesicles disseminate CVB1 virions to new host cells by a nonlytic EV-to-cell mechanism. This was confirmed by detecting CVB1 virions inside HeLa cells after co-culture with CVB1i-mEVs; EV release may also prevent apoptosis of infected cells whilst spreading apoptosis to secondary sites of infection.

Matched MeSH terms: Cell Death
A Cross-Cultural Evaluation of the Construct Validity of Templer's Death Anxiety Scale: A Systematic Review

Sharif Nia H, Lehto RH, Pahlevan Sharif S, Mashrouteh M, Goudarzian AH, Rahmatpour P, et al.

Omega (Westport), 2021 Sep;83(4):760-776.
PMID: 31366310 DOI: 10.1177/0030222819865407

Ensuring use of valid and reliable scales for evaluating death anxiety that are relevant to the cultural context where they are applied is essential. The purpose of the study was to conduct a systematic review of the psychometric properties of Templer's Death Anxiety Scale (DAS) across cultures. PubMed, Scopus, Web of Knowledge, SID, and Magiran databases were systematically searched for studies published between 1970 and 2017 using Mesh terms. Two independent researchers used Quality Assessment of Diagnostic Accuracy Studies and Checklist of Standards for Reporting of Diagnostic Accuracy to evaluate study quality. Included studies were conducted in Iran, United States, Italy, China, Egypt, Spain, and Australia. Overall study quality was acceptable in 15 evaluated articles. However, findings demonstrated that two (one study), three (seven studies), four (four studies), and five factors (three studies) were extracted across the respective studies. Confirmatory concurrent validity was assessed in two studies. While Templer's DAS has stood the test of time as a commonly used index of capturing the conscious experience of death anxiety, there are psychometric inconsistencies in identified factor solutions across cultures. Findings emphasize the need for continued evaluation of how the DAS is translated in specific countries with assessment in relation to other death construct tools.

Matched MeSH terms: Attitude to Death*
Fulltext A Prelimenary Result of the Cardiovascular Risk factors Intervention Study (Pikom Study): Diabetes Mellitus, Hypertension and their Associated Factors

Mohamed M, Winn T, Rampal GL, Abdul Rashid A, Mustaffa B

Malays J Med Sci, 2005 Jan;12(1):20-5.
PMID: 22605943

Cardiovascular disease (CVD) has been the number one cause of death since the last three decades in Malaysia and diabetes mellitus and hypertension are considered as major risk factors. A study to reduce risk factors for cardiovascular diseases in the community (PIKOM) through education and lifestyle changes was undertaken. The study population was from four different areas in Peninsular Malaysia - Kota Bharu and Bachok in Kelantan ; Raub in Pahang; Gunung Besout in Perak and Felda Palong in Negri Sembilan. The subjects invited to participate in this study ware aged between 30 - 65 years, did not have any debilitating illnesses and no known history of diabetes mellitus, hypertension or cardiovascular disease. Subjects were asked to come to the local clinic in a fasting state and after physical examination, blood was taken for plasma glucose and lipids. Oral glucose tolerance test (OGTT) was then performed. A total of 4,121 subjects participated in the study. The proportion of subjects with diabetes mellitus was highest in Felda Palong area (20.3%) and lowest in Raub area (7.1%). The proportion of subjects with hypertension was also highest in Felda Palong area (38.6%) and lowest in Raub area (29.1%). This could be attributable to the subjects in Felda Palong having the highest mean Body Mass Index (BMI) and Waist-to-Hip Ratio (WHR). There were significant associations between diabetes and hypertension with age and obesity. Subjects with diabetes mellitus and hypertension also had the highest mean age, BMI, WHR and plasma cholesterol.In conclusion, the proportion of patients with risk factors for CVD was high and intervention studies through education and lifestyle changes were being carried out to see their effectiveness.

Matched MeSH terms: Cause of Death
Fulltext A Prospective Cohort Study of Obstetric Immigrants in the Maternity Hospital Kuala Lumpur. A Pilot

Noraihan Mohd. Nordin, Sharda, Priya, Zainab Shamsuddin

International Medical Journal Malaysia, 2006;5(1):1-12.
MyJurnal

Objectives: The objectives of this study were to ascertain the prevalence of Indonesians obstetrics immigrant and to assess the fetal maternal outcome. Methodology: A prospective cohort study design was used to analyse 54 consecutive Indonesians obstetrics immigrant compared to 56 Malay women. Chi square and student t test were used where appropriate, p < 0.05 was considered to be of statistical significance. Results: There was a reducing trend in the incidence admission of Indonesians from 10.5 in 1999 to 6.5 % in 2002. The maternal mortality ratio showed an increasing trend from 1999 (40.0/100000) to 2001 (162.9/100000) but decreased to 5.8/100000 in 2002. The majority was between 20-40 years old, multiparous and booked, which was similar to the Malay population. Most Malays were in occupational class 1 to 3 and the husband has secondary and tertiary education compared to the Indonesians who were in class 4 and 5 and the husband has primary and no formal education. Significantly more immigrants were housewives compared to Malays who were working women. There was no significant difference in the antenatal complications. There were no significant difference in terms of delivery and most delivered vaginally. The perinatal outcome in terms of gestation, birth weight, Apgar score and admission to neonatal ICU were similar in both populations and there was no perinatal mortality. In conclusion, the incidence admission of Indonesian immigrant was on the decreasing trend. The outcome of these patients managed in MHKL was similar to the Malay population. Further studies with enrollment of a larger number of patients should be carried out to ascertain the significance of these findings.

Matched MeSH terms: Perinatal Death
Fulltext A Study on Arrhythmia via ECG Signal Classification Using the Convolutional Neural Network

Wu M, Lu Y, Yang W, Wong SY

Front Comput Neurosci, 2020;14:564015.
PMID: 33469423 DOI: 10.3389/fncom.2020.564015

Cardiovascular diseases (CVDs) are the leading cause of death today. The current identification method of the diseases is analyzing the Electrocardiogram (ECG), which is a medical monitoring technology recording cardiac activity. Unfortunately, looking for experts to analyze a large amount of ECG data consumes too many medical resources. Therefore, the method of identifying ECG characteristics based on machine learning has gradually become prevalent. However, there are some drawbacks to these typical methods, requiring manual feature recognition, complex models, and long training time. This paper proposes a robust and efficient 12-layer deep one-dimensional convolutional neural network on classifying the five micro-classes of heartbeat types in the MIT- BIH Arrhythmia database. The five types of heartbeat features are classified, and wavelet self-adaptive threshold denoising method is used in the experiments. Compared with BP neural network, random forest, and other CNN networks, the results show that the model proposed in this paper has better performance in accuracy, sensitivity, robustness, and anti-noise capability. Its accurate classification effectively saves medical resources, which has a positive effect on clinical practice.

Matched MeSH terms: Cause of Death
A bismuth diethyldithiocarbamate compound promotes apoptosis in HepG2 carcinoma, cell cycle arrest and inhibits cell invasion through modulation of the NF-κB activation pathway

Ishak DH, Ooi KK, Ang KP, Akim AM, Cheah YK, Nordin N, et al.

J Inorg Biochem, 2014 Jan;130:38-51.
PMID: 24176918 DOI: 10.1016/j.jinorgbio.2013.09.018

The compound with R=CH2CH3 in Bi(S2CNR2)3 (1) is highly cytotoxic against a range of human carcinoma, whereas that with R=CH2CH2OH (2) is considerably less so. Both 1 and 2 induce apoptosis in HepG2 cells with some evidence for necrosis induced by 2. Based on DNA fragmentation, caspase activities and human apoptosis PCR-array analysis, both the extrinsic and intrinsic pathways of apoptosis have been shown to occur. While both compounds activate mitochondrial and FAS apoptotic pathways, compound 1 was also found to induce another death receptor-dependent pathway by induction of CD40, CD40L and TNF-R1 (p55). Further, 1 highly expressed DAPK1, a tumour suppressor, with concomitant down-regulation of XIAP and NF-κB. Cell cycle arrest at the S and G2/M phases correlates with the inhibition of the growth of HepG2 cells. The cell invasion rate of 2 is 10-fold higher than that of 1, a finding correlated with the down-regulation of survivin and XIAP expression by 1. Compounds 1 and 2 interact with DNA through different binding motifs with 1 interacting with AT- or TA-specific sites followed by inhibition of restriction enzyme digestion; 2 did not interfere with any of the studied restriction enzymes.

Matched MeSH terms: Death-Associated Protein Kinases/genetics
A case of normal pregnancy with an abdominal lithopaedion

Kelkar SK

Journal of the Malaya Branch of the British Medical Association, 1940;4:319-21.

A case of intra-uterine normal pregnancy with an extra-uterine abdominal full term dead foetus (lithopaedion) is described. The impossibility of differentiation from twin uterine pregnancy until after birth of first baby is pointed out.

Matched MeSH terms: Fetal Death
A case of rudimentary horn pregnancy that reached term

Ngieng LN

Med J Malaya, 1970 Sep;25(1):65-7.
PMID: 4249500
Matched MeSH terms: Fetal Death/etiology
Fulltext A comparison of morbidity patterns in Peninsular Malaysia 1959 and 1974

Arokiasamy JT, Chen PCY

Med J Malaysia, 1980 Jun;34(4):336-42.
PMID: 7219259

Disease patterns among outpatients seen at static and travelling dispensaries, as well as among hospital admissions and hospital deaths are compared between 1959 and 1974. While disease patterns of patients seen by travelling dispensaries show no change, patients seen by static dispensaries and hospital admissions in 1974 show a marked relative decline in infective and parasitic diseases and an increase in accidents, poisonings and violence. Causes of death in hospitals in 1974 were different, there being relative increases in diseases of early infancy, diseases of circulatory system, neoplasms, and accidents, poisonings, violence while infective and parasitic diseases, and diseases of the digestive system declined.

Matched MeSH terms: Death
A computational model to investigate the influence of electrode lengths on the single probe bipolar radiofrequency ablation of the liver

Cheong JKK, Yap S, Ooi ET, Ooi EH

Comput Methods Programs Biomed, 2019 Jul;176:17-32.
PMID: 31200904 DOI: 10.1016/j.cmpb.2019.04.028

BACKGROUND AND OBJECTIVES: Recently, there have been calls for RFA to be implemented in the bipolar mode for cancer treatment due to the benefits it offers over the monopolar mode. These include the ability to prevent skin burns at the grounding pad and to avoid tumour track seeding. The usage of bipolar RFA in clinical practice remains uncommon however, as not many research studies have been carried out on bipolar RFA. As such, there is still uncertainty in understanding the effects of the different RF probe configurations on the treatment outcome of RFA. This paper demonstrates that the electrode lengths have a strong influence on the mechanics of bipolar RFA. The information obtained here may lead to further optimization of the system for subsequent uses in the hospitals.
METHODS: A 2D model in the axisymmetric coordinates was developed to simulate the electro-thermophysiological responses of the tissue during a single probe bipolar RFA. Two different probe configurations were considered, namely the configuration where the active electrode is longer than the ground and the configuration where the ground electrode is longer than the active. The mathematical model was first verified with an existing experimental study found in the literature.
RESULTS: Results from the simulations showed that heating is confined only to the region around the shorter electrode, regardless of whether the shorter electrode is the active or the ground. Consequently, thermal coagulation also occurs in the region surrounding the shorter electrode. This opened up the possibility for a better customized treatment through the development of RF probes with adjustable electrode lengths.
CONCLUSIONS: The electrode length was found to play a significant role on the outcome of single probe bipolar RFA. In particular, the length of the shorter electrode becomes the limiting factor that influences the mechanics of single probe bipolar RFA. Results from this study can be used to further develop and optimize bipolar RFA as an effective and reliable cancer treatment technique.

Matched MeSH terms: Cell Death
Fulltext A hospital based audit of tuberculosis deaths

Hooi LN, Goh KY

Med J Malaysia, 1995 Dec;50(4):306-13.
PMID: 8668048

An audit was done on 54 tuberculosis patients presenting to Penang Hospital who died during 1993. Active tuberculosis was the cause of death in 29 (53.7%) and 48.3% were aged under 50 years. Tuberculosis was a contributory cause of death in 8 patients and in 17 patients tuberculosis was irrelevant to the cause of death. The diagnosis of tuberculosis was made after death in 17 patients (31.5%). Late diagnosis was the most important factor resulting in death. Only 41.4% of the deaths from active tuberculosis were correctly certified in government hospitals. Medically inspected and certified deaths from tuberculosis is an unreliable indicator of tuberculosis mortality because of inaccuracies in death certification, tuberculosis deaths occurring outside hospital and tuberculosis patients undiagnosed until after death.

Matched MeSH terms: Cause of Death; Death Certificates
Fulltext A journey from the known to the unknown: a qualitative study approach

Helenna M Hisham Hashim, Lee, Mei-Li, Ng, Chong Guan

ASEAN Journal of Psychiatry, 2013;14(1):0-0.
MyJurnal

Objective: Individuals deal with dying and death differently and may not experience the same journey. We investigated Kübler-Ross' Five Stages of Grief on terminally ill patients to review the current applicability of the model among this population. The aims of this paper is to share information regarding the Five Stages of Grief, the emotions associated with the stages, and the challenges that terminally ill patients, namely those diagnosed with cancer, experience. Methods: Non-structured interviews were conducted among terminally ill patients located at the palliative ward for two years. Results: We found that terminally ill patients at the palliative ward were undergoing the Five Stages of Grief, and that the emotions associated with the stages were reported to be similar to the emotions proposed in the model and among the patients. Conclusion: Kübler-Ross' Five Stages of Grief is still applicable among terminally ill patients. The thoughts regarding dying and death still remain negative, therefore, the change in the myths of dying and death are required to help improve the journey towards death. ASEAN Journal of Psychiatry, Vol. 14 (1): January - June 2013: XX XX.

Matched MeSH terms: Death
Fulltext A large left ventricular tumour presenting with arrhythmias in a 2-month-old infant

Wan Adlina Wan Yusuf, Amelia Alias, Wan Hanifah Wan Hussin1, Mohd Nasir Abdul Kadir, Abdul Rahim Wong

Malaysian Journal of Paediatrics and Child Health, 2018;24(2):1-5.
MyJurnal

Primary cardiac tumours (PCT) are rare in the paediatric population. They can present in a variety of ways – from being asymptomatic, obstructive with heart failure, strokes, arrhythmias or sudden death. We present a 2-month-old child who was admitted because of heart failure from varying types of arrhythmias and was found on echocardiography to have a large left ventricular tumour. A high clinical suspicion in any infant or child who presents with an unexplained heart murmur, arrhythmias or congestive heart failure should prompt relevant investigations ruling out this entity.

Matched MeSH terms: Death, Sudden
A life saved at the cost of hand injury - A case of hand burn due to airbag deployment

Fadzullah NA, Kasthuri S, Basiron N

Med J Malaysia, 2019 Oct;74(5):452-453.
PMID: 31649230

According to the Malaysian Department of Statistics motor vehicle accidents are the third leading cause of death in Malaysia and accounts for 7.4% of premature deaths in 2016. With the invention of the airbag, the number of serious injuries and fatalities have been reduced significantly. However, there has also been a corresponding increase in the number of injuries attributable to these devices. The patient narrated in this case report sustained a mixed dermal thickness burn over the upper limb as a result of an airbag deployment. She recovered without other life threatening injuries.

Matched MeSH terms: Cause of Death; Death
Fulltext A meta-analysis on immune checkpoint inhibitor efficacy for advanced non-small cell lung cancer between East Asians versus non-East Asians

Peng S, Ying AF, Tai BC, Soo RA

Transl Lung Cancer Res, 2020 Aug;9(4):1124-1137.
PMID: 32953491 DOI: 10.21037/tlcr-20-246

Background: We conducted a meta-analysis to assess the efficacy of immune checkpoint inhibitors (ICIs) (PD-1/L1 and CTLA-4 inhibitors) in first and subsequent lines in East Asians and non-East Asians.
Methods: We searched PubMed-MEDLINE, Embase and Scopus, from inception to 20 Sep 2019, and reviewed major conferences' abstracts, for randomised controlled trials of ICI in advanced-stage NSCLC (Stage IIIB or IV) without EGFR mutation that reported hazard ratios (HRs) stratified by geographical region including the region "Asia" or "East Asia". The primary outcome measures were overall survival (OS) and progression-free survival (PFS). The pooled HR and its 95% confidence interval (CI) for OS and PFS in East Asians and non-East Asians were calculated using a random effect model and the difference compared using an interaction test.
Results: A total of 5,465 patients from 7 randomised controlled trials involving CTLA-4 and/or PD-1/L1 inhibitors were included, with 1,740 (32%) East Asians and 3,725 (68%) non-East Asians. ICI was associated with an improvement in OS and PFS for both East Asian (OS HR, 0.74; 95% CI, 0.65-0.85; PFS HR, 0.56; 95% CI, 0.40-0.79) and non-East Asian patients (OS HR, 0.78; 95% CI, 0.72-0.85; PFS HR, 0.69; 95% CI, 0.56-0.85), with no significant difference between the two groups (Pinteraction=0.55 for OS; Pinteraction=0.33 for PFS). Subgroup analyses showed a statistically significant superior PFS (but not OS) for East Asians than non-East Asians in trials that used immune checkpoint inhibitor in the first-line treatment (Pinteraction=0.02). No significant regional difference was found in further subgroups of pure ICI and combination of ICI with chemotherapy.
Conclusions: There is no significant difference in response to ICI between East Asians and non-East Asians with advanced stage NSCLC, and the statistically significant subgroup difference in PFS in the first line use of ICI may not be clinically significant.

Matched MeSH terms: Programmed Cell Death 1 Receptor
Fulltext A mouse model of weight-drop closed head injury: emphasis on cognitive and neurological deficiency

Khalin I, Jamari NL, Razak NB, Hasain ZB, Nor MA, Zainudin MH, et al.

Neural Regen Res, 2016 Apr;11(4):630-5.
PMID: 27212925 DOI: 10.4103/1673-5374.180749

Traumatic brain injury (TBI) is a leading cause of death and disability in individuals worldwide. Producing a clinically relevant TBI model in small-sized animals remains fairly challenging. For good screening of potential therapeutics, which are effective in the treatment of TBI, animal models of TBI should be established and standardized. In this study, we established mouse models of closed head injury using the Shohami weight-drop method with some modifications concerning cognitive deficiency assessment and provided a detailed description of the severe TBI animal model. We found that 250 g falling weight from 2 cm height produced severe closed head injury in C57BL/6 male mice. Cognitive disorders in mice with severe closed head injury could be detected using passive avoidance test on day 7 after injury. Findings from this study indicate that weight-drop injury animal models are suitable for further screening of brain neuroprotectants and potentially are similar to those seen in human TBI.

Matched MeSH terms: Cause of Death

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