Aberrant promoter hypermethylation of selected apoptotic genes in childhood acute lymphoblastic leukemia among North Indian population

Promoter hypermethylation mediates gene silencing in many neoplasms. Acute leukemia has been reported to harbor multiple genes aberrantly silenced by hypermethylation.

AIM

In present study, we investigated the prevalence of hypermethylation of caspase-8 (CASP8), TMS1 and DAPK genes in correlation with clinicopathological factors in childhood acute lymphoblastic leukemia (ALL).

MATERIALS AND METHODS

A case-control study has been conducted based on bone marrow and peripheral blood samples from 125 ALL patients and 100 sex-age matched healthy controls. Methylation specific polymerase chain reaction (PCR) and bisulfite sequencing PCR was performed to analyze the methylation status of these genes. Reverse transcription PCR and real time PCR was carried out to determine changes in the mRNA expression level of the genes due to hypermethylation.

RESULTS

Hypermethylation of the 5´CpG islands of the CASP8, TMS1 and DAPK gene promoters was found in 3.2, 6.4, and 13.6% of 125 childhood ALL samples from north Indian population, respectively. There were significant differences in pattern of hypermethylation of TMS1 (p = 0.045) and DAPK (p < 0.001) between patients and healthy controls. Down-regulation of mRNA expression was found in cases in which CASP8, TMS1 and DAPK were hypermethylated.

CONCLUSIONS

The present study indicated the impact of hypermethylation-mediated inactivation of CASP8, TMS1 and DAPK genes, which is associated with risk of childhood ALL. This abnormality occurs in leukemogenesis and it may be used as a biomarker and for predicting the prognosis of ALL.

Suicide and self-inflicted injury hospitalizations in Canada (1979 to 2014/15)

INTRODUCTION

The purpose of this paper is to describe the trends and patterns of self-inflicted injuries, available from Canadian administrative data between 1979 and 2014/15, in order to inform and improve suicide prevention efforts.

METHODS

Suicide mortality and hospital separation data were retrieved from the Public Health Agency of Canada (PHAC) holdings of Statistics Canada's Canadian Vital Statistics: Death Database (CVS:D) (1979 to 2012); Canadian Socio-Economic Information Management System (CANSIM 2011, 2012); the Hospital Morbidity Database (HMDB) (1994/95 to 2010/11); and the Discharge Abstract Database (2011/12 to 2014/15). Mortality and hospitalization counts and rates were reported by sex, 5-year age groups and method.

RESULTS

The Canadian suicide rate (males and females combined, all ages, age-sex standardized rate) has decreased from 14.4/100 000 (n = 3355) in 1979 to 10.4/100 000 (n = 3926) in 2012, with an annual percent change (APC) of -1.2% (95% CI: -1.3 to -1.0). However, this trend was not observed in both sexes: female suicide rates stabilized around 1990, while male rates continued declining over time-yet males still accounted for 75.7% of all suicides in 2012. Suffocation (hanging and strangulation) was the primary method of suicide (46.9%) among Canadians of all ages in 2012, followed by poisoning at 23.3%. In the 2014/15 fiscal year, there were 13 438 hospitalizations in Canada (excluding Quebec) associated with self-inflicted injuries-over 3 times the number of suicides. Over time females have displayed consistently higher rates of hospitalization for self-inflicted injury than males, with 63% of the total. Poisoning was reported as the most frequent means of self-inflicted harm in the fiscal year 2014/15, at 86% of all hospitalizations.

CONCLUSION

Suicides and self-inflicted injuries continue to be a serious - but preventable - public health problem that requires ongoing surveillance.

Microbial pectinases: an ecofriendly tool of nature for industries

Pectinases are the growing enzymes of biotechnological sector, showing gradual increase in their market. They hold a leading position among the commercially produced industrial enzymes. These enzymes are ecofriendly tool of nature that are being used extensively in various industries like wine industry; food industry; paper industry for bleaching of pulp and waste paper recycling; in the processing of fruit–vegetables, tea–coffee, animal feed; extraction of vegetable oil and scouring of plant fibres. Moreover, enzymatic catalysis is preferred over other chemical methods, since it is more specific, less aggressive and saves energy. This is the review which covers the information available on the applicability potential of this group of enzymes in various sectors.

Concerns about usage of smartphones in operating room and critical care scenario

Smartphones and tablets have taken a central place in the lives of health care professionals. Their use has dramatically improved the communication and has become an important learning tool as the medical information can be assessed online at anytime. In critical care settings, use of smartphone facilitates quick passage of information through E-mail messaging and getting feedback from the concerned physician quickly, thereby reducing medical errors. However, in addition to the benefits offered, these devices have become a significant source of nosocomial infections, distraction for medical professionals and interfere with medical equipments. They may also put privacy and security of patients at stake. The benefits could be severely undermined if abuse and over use are not kept in check. This review article focuses on various applications of smartphones in healthcare practices, drawback of the use of these devices and the recommendations regarding the safe use of these devices.

A COMPARATIVE ANALYSIS OF METHYLATION STATUS OF TUMOR SUPPRESSOR GENES IN PAIRED BIOPSY AND SERUM SAMPLES FROM CERVICAL CANCER PATIENTS AMONG NORTH INDIAN POPULATION

Tumor-specific genetic or epigenetic alterations have been detected in serum DNA in case of various types of cancers. In breast cancer, the detection of tumor suppressor gene hypermethylation has been reported in several body fluids. Promoter hypermethylation of some genes like MYOD1, CALCA, hTERT etc. has also been detected in serum samples from cervical cancer. The present study is the first report on the comparison of promoter hypermethylation of tumor suppressor genes likep14, p15, p16, p21, p27, p57, p53, p73, RARβ2, FHIT, DAPK, STAT1 and-RB1 genes in paired biopsy and serum samples from cervical cancer patients among north Indian population. This is also the first report on the hypermethylation of these genes in serum samples from cervical cancer patients among north Indian population. According to the results of the present study, promoter hypermethylation of these genes can also be detected in serum samples of cervical cancer patients. The sensitivity of detection of promoter hypermethylation in serum samples of cervical cancer patients as compared to paired biopsy samples was found to be around 83.3%. It was observed that promoter hypermethylation was mainly observed in the serum samples in the higher stages and very rarely in the lower stages. The present study clearly showed that serum of patients with cervical cancer can also be used to study methylated genes as biomarkers.

A study of methylprednisolone neuroprotection against acute injury to the rat spinal cord in vitro

Methylprednisolone sodium succinate (MPSS) has been proposed as a first-line treatment for acute spinal cord injury (SCI). Its clinical use remains, however, controversial because of the modest benefits and numerous side-effects. We investigated if MPSS could protect spinal neurons and glia using an in vitro model of the rat spinal cord that enables recording reflexes, fictive locomotion and morphological analysis of damage. With this model, a differential lesion affecting mainly either neurons or glia can be produced via kainate-evoked excitotoxicity or application of a pathological medium (lacking O2 and glucose), respectively. MPSS (6-10 μM) applied for 24 h after 1-h pathological medium protected astrocytes and oligodendrocytes especially in the ventrolateral white matter. This effect was accompanied by the return of slow, alternating oscillations (elicited by NMDA and 5-hydroxytryptamine (5-HT)) reminiscent of a sluggish fictive locomotor pattern. MPSS was, however, unable to reverse even a moderate neuronal loss and the concomitant suppression of fictive locomotion evoked by kainate (0.1 mM; 1 h). These results suggest that MPSS could, at least in part, contrast damage to spinal glia induced by a dysmetabolic state (associated to oxygen and glucose deprivation) and facilitate reactivation of spinal networks. Conversely, when even a minority of neurons was damaged by excitotoxicity, MPSS did not protect them nor did it restore network function in the current experimental model.

Burden Assessment, Psychiatric Morbidity, and Their Correlates in Caregivers of Patients with Intellectual Disability

OBJECTIVE

Intellectual disability in a child places great stress on a family and caregiver and this leads to significant socio-occupational dysfunction and impaired quality of life for caregivers. This study aimed to assess socio-demographic characteristics, burden, and psychiatric morbidity of the caregivers of persons with intellectual disability, as well as to determine the variables that correlated with burden and psychiatric morbidity.

METHODS

An observational study was carried out in an outpatient psychiatric unit of a tertiary care teaching hospital in India from October 2014 to April 2015. A total of 100 caregivers of intellectually impaired individuals were assessed for burden and psychiatric morbidity.

RESULTS

In all, 39% of the caregivers had a high burden score, 46% perceived mild-to-moderate burden severity, and 15% perceived no to mild burden. Mild-to-moderate depressive symptoms were present in 23% and 16% had severe-to-extremely severe depressive symptoms. Mild-to-moderate anxiety symptoms were evident in 19% of caregivers and a further 19% had severe-to-extremely severe anxiety symptoms.

CONCLUSION

Routine assessment of burden and psychiatric morbidity in the caregiver will help to reduce their burden and thus help them care for their children more appropriately and efficiently.

Ets1 identified as a novel molecular target of RNA aptamer selected against metastatic cells for targeted delivery of nano-formulation

Nanomedicine era is not far from its realization, but a major concern of targeted delivery still stands tall in its way. Herein we demonstrate the mechanism underlying the anticancer activity of an RNA aptamer (Apt) conjugated to gefitinib-loaded poly (lactic co-glycolic acid) nanoparticles (GNPs). Apt was selected through Cell-SELEX (systemic evolution of ligands by exponential enrichment) process against gefitinib-resistant H1975 lung cancer cells. The selected aptamer exhibited high specificity toward H1975 cells, both qualitatively as well as quantitatively. Software analysis using the MATCH tool predicted Ets1, a proto-oncoprotein, to be the target of the selected aptamer. Interestingly, the localization of identified aptamer varied in descending order of Ets1 expression, wherein maximum localization was observed in H1975 cells than in MDA-MB231, DU-145, H23, H460, A431, A549 and MCF-7 cells, and minimum in L132 cells. Furthermore, Apt-GNP bio-conjugate showed augmented anticancer activity specifically in Ets1-overexpressing cells. In addition, partial depletion of Ets1 in H1975 cells and overexpression of Ets1 in L132 cells reversed the targeting efficacy of the aptamer. Notably, a single intratumoral injection of the Apt-GNP bio-conjugate abrogated the growth of tumor in H1975 xenograft nude mice. Altogether, we present a pioneering platform, involving aptamers, which can be clinically used as a diagnostic marker for metastasis as well as an effective delivery system to escort the pharmaceutical cargo specifically to Ets1-overexpressing highly progressive tumors.