Monday March 18, 2019

Novel Drug May Shorten Treatment Duration For Tuberculosis

Despite significant progress in combating tuberculosis, it remains the leading infectious cause of death worldwide, he said

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A new experimental antibiotic for tuberculosis (TB) has been shown to be more effective against TB than Isoniazid, a decades old drug which is currently one of the standard treatment for the disease, finds a study on mice.

The new drug, called AN12855, has several advantages over Isoniazid as Isoniazid requires conversion to its active form by a Mycobacterial enzyme, KatG, in order to kill the pathogen, which creates some problems.

In some M. tuberculosis, KatG is nonfunctional. That does not make M. tuberculosis any less pathogenic, but it prevents the drug from working. Consequently, this creates an easy avenue for the development of drug resistance.

In the study, the new drug showed a much lower tendency to develop resistance, and it remains in the tissues where the Mycobacterium tuberculosis bacteria reside for longer, killing them more effectively.

WHO will start working towards ending Tuberculosis
Dr. Simon Angelo (L) examines Iman Steven suffering from tuberculosis, held by her mother (R) at the hospital of Doctors Without Borders (MSF), June 15, 2016, at the Protection of Civilians (PoC) site in Malakal, South Sudan. VOA

The goal of TB drug development programmes is to develop universal treatment regimens that will shorten and simplify TB treatment in patients, which typically takes at least six months, and sometimes more than a year, said lead author Gregory T. Robertson, Assistant Professor at the Colorado State University in Fort Collins in the US.

For the study, the researchers used a new TB mouse model that develops these M. tuberculosis-containing granulomas to compare Isoniazid and AN12855.

Granuloma refers to a mass of granulation tissue, typically produced in response to infection, inflammation, or the presence of a foreign substance.

“We discovered that the drugs differed dramatically with respect to their abilities to kill the pathogen in highly diseased tissues,” said Robertson.

Tuberculosis
New TB drug may shorten treatment duration: Study. IANS

AN12855 proved more effective, “without selecting for appreciable drug resistance”, added Robertson in the study published in the journal Antimicrobial Agents and Chemotherapy.

Despite significant progress in combating tuberculosis, it remains the leading infectious cause of death worldwide, he said.

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“Multidrug resistance is a further challenge to the mission to control TB globally. Collectively, our group has pioneered the use of new TB mouse efficacy models to help advance innovative new therapies designed to shorten the length of TB treatment.” (IANS)

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Vitamin D May Help to Combat Multi-drug Resistant Tuberculosis

For the study, researchers included 1,850 patients who received antibiotic treatment

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Tuberculosis
Representational image. IANS

Vitamin D, commonly known as the “sunshine vitamin”, can combat tuberculosis (TB) bacteria found in the lungs of people with multi-drug resistant TB, according to latest research.

The study showed that when added to antibiotic treatment, vitamin D was found to treat TB specifically in patients with multi-drug resistant (MDR) TB.

The vitamin D supplementation was also found to be safe at the doses administered, with no links to serious adverse events, findings further revealed in the European Respiratory Journal.

“Multi-drug resistant TB is on the rise globally. It’s notoriously difficult to treat, and it carries a much worse prognosis than standard TB,” said Lead Researcher Adrian Martineau, Professor from Queen Mary University of London.

“Our study raises the possibility that vitamin D — which is very safe and inexpensive — could benefit this hard-to-treat group of patients by taking a novel approach to their treatment,” said Martineau.

Rats can play a role in containing Tuberculosis
Dr. Simon Angelo (L) examines Iman Steven suffering from tuberculosis, held by her mother (R) at the hospital of Doctors Without Borders (MSF), June 15, 2016, at the Protection of Civilians (PoC) site in Malakal, South Sudan. VOA

The immune system could be given a boost by adding vitamin D to antibiotic treatment to help the body clear TB bugs, rather than relying on antibiotics on their own to kill the bacteria directly, the study suggested.

While vitamin D is best known for its effects on bone health, previous studies have shown its role in protecting against colds, flu, asthma attacks, and that it can also protect chronic obstructive pulmonary disease (COPD) patients from deadly lung attacks.

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MDR TB is caused by bacteria that are resistant to treatment with at least two of the most powerful first-line anti-TB drugs, causing around 500,000 cases and 150,000 deaths per year worldwide, the study noted.

For the study, researchers included 1,850 patients who received antibiotic treatment. (IANS)