Biomedical Laboratory Science

Wednesday, June 22, 2016

What Is A Scientist?

Are engineers considered scientists? What about lab technicians, archaeologists and art historians?

The answer isn’t always obvious…

AsianScientist (Jun. 15, 2016) - Two things happened recently that made me ponder a question that’s really going to open a can of worms. Case No. 1: Catching up with an old friend who decided to leave the lab for the bright lights of banking, we started discussing our work and he mentioned meeting someone who introduced themselves as a scientist. Further probing of his new acquaintance revealed that this person worked in a diagnostics lab. My friend was outraged. “How dare this person misrepresent themselves as a scientist?” he scoffed. “Putting on a lab coat and running blood tests all day does not make one a scientist!” When I pointed out that this is actually the general stereotype of a scientist in the eyes of non-scientists... let’s just say this conversation got a bit frosty.

Donor Blood Test May be Holding Back Heart Transplantation

A blood test used to determine whether a heart is suitable for donation may be leading to unnecessary rejections, and its use should be reviewed. This is the conclusion of a new study published in the journal Circulation: Heart Failure.

Heart failure occurs when the heart is unable to pump enough oxygen-rich blood around the body to help other organs function.

According to the Centers for Disease Control and Prevention (CDC), in the United States, around 5.7 million Americans have heart failure.

In some cases, heart failure can be treated with lifestyle changes - such as a healthy diet, exercise, and quitting smoking - and medications. For end-stage heart failure, however, a heart transplant may be the only option.

Determining whether a heart is suitable for transplantation based on donor troponin I levels may be
causing unnecessary rejections, say researchers.

Source: medicalnewstoday

The Role of Diet and Exercise in the Transgenerational Epigenetic Landscape of T2DM

Epigenetic changes are caused by biochemical regulators of gene expression that can be transferred across generations or through cell division. Epigenetic modifications can arise from a variety of environmental exposures including undernutrition, obesity, physical activity, stress and toxins. Transient epigenetic changes across the entire genome can influence metabolic outcomes and might or might not be heritable. These modifications direct and maintain the cell-type specific gene expression state. Transient epigenetic changes can be driven by DNA methylation and histone modification in response to environmental stressors. A detailed understanding of the epigenetic signatures of insulin resistance and the adaptive response to exercise might identify new therapeutic targets that can be further developed to improve insulin sensitivity and prevent obesity. This Review focuses on the current understanding of mechanisms by which lifestyle factors affect the epigenetic landscape in type 2 diabetes mellitus and obesity. Evidence from the past few years about the potential mechanisms by which diet and exercise affect the epigenome over several generations is discussed.

Key points

Epigenetic processes have been implicated in the pathogenesis of type 2 diabetes mellitus
Diet and exercise might affect the epigenome over several generations
Epigenetic changes can be driven by DNA methylation and histone modification in response to environmental stressors
Regulation of gene expression by DNA methylation and histone modification occurs by a mechanism that impairs the access of transcriptional machinery to the promoters
Studying the epigenetic signatures of insulin resistance and the adaptive response to exercise might provide insight into gene–environment networks that control glucose and energy homeostasis.

Figure 2: Putative effects of exercise and obesity on the predisposition to metabolic diseases.

Source: NatureReviewsEndocrinology

Heart Attack Risk is Lower When Immune System is More Robust

Could a robust immune system protect against heart attack? After studying a group of patients with high blood pressure, researchers found those with higher levels of certain antibodies had a lower risk of heart attack - regardless of other risk factors. They suggest a blood test to measure antibody levels could help assess a person's risk of heart attack.

The study, from Imperial College London in the United Kingdom, is published in the journal EbioMedicine. It describes how the team discovered a link between blood levels of Immunoglobulin G (IgG) antibodies and reduced chances of having a heart attack.

Lead investigator Dr. Ramzi Khamis, a consultant cardiologist and clinical research fellow, says:

"Linking a stronger, more robust immune system to protection from heart attacks is a really exciting finding. As well as improving the way we tell who is at the highest risk of a heart attack so that we can give them appropriate treatments, we now have a new avenue to follow in future work."

The study found higher blood levels of an antibody called IgG were linked to lower risk of heart attack
in a group of people with high blood pressure.

Source: medicalnewstoday

Mastering Your PhD: Survival and Success in the Doctoral Years and Beyond

"Mastering Your PhD: Survival and Success in the Doctoral Years and Beyond" helps guide PhD students through their graduate student years. Filled with practical advice on getting started, communicating with your supervisor, staying the course, and planning for the future, this book is a handy guide for graduate students who need that extra bit of help getting started and making it through.

While mainly directed at PhD students in the sciences, the book's scope is broad enough to encompass the obstacles and hurdles that almost all PhD students face during their doctoral training. Who should read this book? Students of the physical and life sciences, computer science, math, and medicine who are thinking about entering a PhD program; doctoral students at the beginning of their research; and any graduate student who is feeling frustrated and stuck. It's never too early - or too late!

This second edition contains a variety of new material, including additional chapters on how to communicate better with your supervisor, dealing with difficult people, how to find a mentor, and new chapters on your next career step, once you have your coveted doctoral degree in hand.

Source: Springer

BooksGoogle

Harvard

Arthritis in the Knee: What You Need to Know

Arthritis of the knee can make taking a step painful. Swelling, pain, and stiffness in the joint are just some of the symptoms that can occur when a person has this condition.

The knee joint is a hinge joint, named for its movement that's similar to the opening and closing of a door.

The joint consists of three main bones. The areas where each of these bones meet are covered in a protective material called cartilage. Additional pieces of cartilage known as the meniscus further support the knee.

All of these protective pieces of cartilage keep the bones in the knee from rubbing together, which can be very painful.

There are many different kinds of arthritis that can affect the knee. Common ones include osteoarthritis
and rheumatoid arthritis.

Source: medicalnewstoday

Tuesday, June 21, 2016

Antimicrobial resistance: a collection of reviews and research papers from Nature journals

Resistance to antimicrobials is a global problem of increasing importance. Pathogens rapidly develop mutations that render current treatments ineffective. For example, resistance to carbapenems, one of the ‘last lines’ of antibiotics, is widespread and has been observed in numerous countries; resistance to artemisinin, the gold standard in malaria treatment, has also emerged. Our current arsenal of antimicrobial agents thus has a limited lifespan and new drugs are urgently needed. Tackling this resistance will require a deep understanding of microbial infections and the mechanisms through which resistance arises, as well as concerted efforts between academia and industry aimed at developing novel antimicrobial agents.

This collection consists of Reviews, Research articles, and News and Comment articles from several Nature journals, describing how antibiotic resistance emerges and detailing strategies through which new antimicrobial compounds are being discovered.

Source: nature

Menopause: Symptoms, Causes and Treatments

The menopause marks the time in a woman's life when her menstruation stops and she is no longer fertile (able to become pregnant).

In the UK the average age for the menopause is 52 (National Health Service), while in the USA it is 51 (National Institute of Aging). About one fifth of women in India experience menopause before the age of 41.

The menopause is a normal part of life - it is a milestone, just like puberty - it is not a disease or a condition. Even though it is the time of the woman's last period, symptoms may begin many years earlier. Some women may experience symptoms for months or years afterwards.

Women going through the menopause may experience problems with focusing and learning.

Source: medicalnewstoday

Blood Test Advances Diagnosis Of HELLP Syndrome

A laboratory blood test for the diagnosis of a rare genetic red blood cell disorder also shows promise in identifying HELLP syndrome, a life-threatening high blood pressure condition affecting 1% of all pregnant women.

HELLP is an acronym for hemolysis, elevated liver enzymes and low platelets and is a severe variant of pre-eclampsia whose pathogenesis remains unclear. Recent evidence and clinical similarities suggest a link to atypical hemolytic uremic syndrome, a disease of excessive activation of the alternative complement.

A model of the principle underlying the modified Ham test

Source: labmedica

Is Okra Good for Diabetes?

According to a handful of recent studies, okra may reduce symptoms of diabetes - a group of diseases that includes type 1 diabetes, type 2 diabetes, and gestational diabetes.

Diabetes claimed the lives of 75,578 Americans in 2013, according to the United States Centers for Disease Control and Prevention (CDC). In 2014,8.5 percent of adults worldwide had the condition, the World Health Organization (WHO) report. By 2030, diabetes may be the seventh leading cause of death.

A number of factors increase a person's risk of developing diabetes, including a family history of the disease. Lifestyle factors also play a role, so doctors routinely recommend diet changes and increased exercise to reduce blood sugar levels.

Biomedical Laboratory Science