Saturday January 25, 2020

Using aspirin may reduce obesity’s effect on cancer, finds study

To study how obesity affects this defence mechanism, the team bred mice that were designed to express a known cancer-inducing mutant protein called Ras.

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To study how obesity affects this defense mechanism, the team bred mice that were designed to express a known cancer-inducing mutant protein called Ras.
Representational Image, Pixabay

Aspirin, a medication used to treat pain, fever or inflammation, could significantly reduce the effects of obesity on cancer, suggests a study on mice.

Obesity is a known risk factor for certain types of cancer, including colon, pancreatic and breast cancer.

The new study, from Hokkaido University in Sapporo, Japan, showed that obesity could enhance cancer development by slowing down the key cancer defence mechanism.

“Epithelial” cells lining the surfaces of organs have the intrinsic ability to remove potentially malignant cells from their midst. This is called the “epithelial defense against cancer” mechanism.

Normally, the cells sense harmful cells and push them out by the process called cell competition.

Obesity is a known risk factor for certain types of cancer, including colon, pancreatic and breast cancer.
Medicines. Pixabay

“This is the first report to show that obesity and chronic inflammation can influence competitive interaction between normal cells and transformed cells,” said lead author Yasuyuki Fujita.

“It implies other factors such as infection, smoking, sleeping patterns and ageing may also affect cell competition,” Fujita added.

To study how obesity affects this defense mechanism, the team bred mice that were designed to express a known cancer-inducing mutant protein called Ras.

Epithelial cells usually remove the potentially malignant Ras-transformed cells.

Feeding the Ras mice high-fat diets, which resulted in severe obesity, suppressed the defense mechanism and therefore increased the number of Ras-transformed cells remaining in the tissue.

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This suppression was seen in the intestine and pancreas, but not in the lungs, the researchers noted.

A month later, the Ras-transformed cells developed a tumor in the pancreas of mice with the high-fat diet.

Further experiments using the mice model and cultured cells revealed that fatty acids and chronic inflammation cause the suppression of the defense mechanism.

However, when mice fed a high-fat diet were treated with aspirin, known for its anti-inflammatory properties, the defense mechanism was substantially enhanced.

This implies that reinforcing the epithelial defense mechanism with anti-inflammatory drugs could be utilized for cancer prevention, the researchers said. (IANS)

 

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Here’s how Low-Dose Aspirin may Help Mothers Lower the Risk of Preterm Birth

Low-dose of aspirin regularly can help mothers lower the risk of preterm delivery

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Aspirin
Low-dose aspirin therapy in early pregnancy could provide an inexpensive way to lower the preterm birth rate in first-time mothers. Pixabay

Daily low-dose aspirin, from as early as the sixth week of pregnancy through the 36th week, may lower the risk of preterm birth among first-time mothers, suggest the results of a clinical trial which involved women from several low and middle-income countries, including India.

The study, published in the journal The Lancet, involved more than 11,000 women. The results showed that women taking daily low-dose aspirin were 11 per cent less likely to deliver before the 37th week of pregnancy, compared to those given a placebo.

“Our results suggest that low-dose aspirin therapy in early pregnancy could provide an inexpensive way to lower the preterm birth rate in first-time mothers,” said study author Marion Koso-Thomas of the US National Institutes of Health’s Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD).

Preterm birth is the most common cause of infant death and the leading cause of long-term neurological disability in children.

According to the study authors, advances in newborn care have improved survival for preterm infants, but this care is limited or unavailable in many parts of the world.

Earlier studies have suggested that low-dose aspirin may reduce the risk of preterm birth and pre-eclampsia, a potentially life-threatening blood pressure disorder of pregnancy.

Aspirin pregnancy
Earlier studies have suggested that low-dose aspirin may reduce the risk of preterm birth and pre-eclampsia, a potentially life-threatening blood pressure disorder of pregnancy. Pixabay

However, these studies were not large enough to statistically determine the therapy’s effectiveness in reducing preterm birth. The researchers enrolled 11,976 women with a first-time pregnancy from seven sites in India, Pakistan, Zambia, Democratic Republic of the Congo, Guatemala and Kenya.

Roughly half were assigned at random to receive 81 milligrams of aspirin daily; the other group received a daily placebo. Women were included in the study only if they maintained a pregnancy for more than 20 weeks.

Preterm birth (before 37 weeks) occurred in 11.6 per cent of the women who took aspirin and in 13.1 per cent of the women who took the placebo. Similarly, birth before 34 weeks (early preterm delivery) occurred in 3.3 per cent of the aspirin group and 4 per cent of the placebo group (a 25 per cent reduction).

Women in the aspirin group also had a lower rate of perinatal mortality (stillbirth or newborn death in the first seven days of life), compared to the placebo group (45.7 per 1,000 births vs 53.6 per 1,000 births).

Also Read- Here’s Why Yogurt Consumption May Help in Avoiding Breast Cancer Risk

The risk of high blood pressure disorders of pregnancy at term did not differ significantly between the groups. The low cost and safety of low-dose aspirin therapy suggests that it could be easily adapted for wide-scale use, suggested the study authors. (IANS)