Author Archives: Sharon Li

Researchers Looking into 2 Week Allergy Treatment

Globally, 220-520 million people suffer from food-related allergies that range from mild discomfort to being the cause of death. Chances are, there is someone in your course affected by this chronic illness. Currently, there are no approved treatments for these allergies other than completely omitting them from your diet, using antihistamines or epinephrine when allergy symptoms appear, or oral immunotherapy. However, it’s very difficult to avoid cross-contamination, especially when you need to eat food someone else has prepared and immunotherapy takes 9-12 months, causing allergic reactions along the way. But what if there was a way to desensitize, even completely remove the immune systems’ response to food that cause allergies in as little as 2 weeks without causing a reaction?

From a small study released on Nov 14, 2019, the researchers from Sean N. Parker Center for Allergy and Asthma Research at Stanford University has found that when targeting the alarmin IL-33 (a signal that initiates inflammatory responses) in peanut-allergic people with etokimab (an antibody injection) there was a 73% increase in the tolerance threshold for the allergy compared to the placebo group. These people could eat moderate amounts of peanuts (no more than 300 mg) 15 days after the injection without having to be expose to the allergen beforehand. This percentage dropped to a 57% increase after 45 days.

Since this is a relatively new study, there are still some improvements to be made on the procedure itself. The sample of the double-blind experiment was only 20 adults with 15  adults receiving estimable and 5 adults receiving the placebo, and the results were self-reported, which can cause a lot of variability in the data. However, the results from this small experiment was promising, and personally, I hope that etokimab will be available for the public use in the next few decades. It would be extremely helpful to eat out without having to worry about being rushed to the hospital due to accidental contamination or even just to see what peanuts would taste like.

-Sharon Li

Bacteria Can Change Shape to Avoid Antibiotics?!

Can bacteria now consciously make the decision to change its’ shape to avoid being targeted by antibiotics? This article titled “Bacteria caught changing shape to evade antibiotics” seems to think so. However, upon reading this article, I discovered that it’s not that the bacteria makes the conscious decision to change its’ shape in order to avoid being targeted by antibiotics, but rather, the environment that the bacteria is in allows it to shed its’ cell wall. The title of the article is extremely misleading, and can cause undeserved panic because it is implying that bacterial organisms that are damaging to humans have evolved to the point where humans can no longer control them.

TEM of L-form bacteria from Mark Leaver of Newcastle University

If you continue to read the article, you’ll also discover that this certain strain of bacteria can’t evade all antibiotics. It can only make antibiotics that target the cell wall of the bacteria ineffective. There are antibiotics specifically made for targeting cell walls because there aren’t any human cells with cell walls, which makes it easier for the antibiotics to target the right cell. However, bacteria can shed its’ cell wall under non-hostile conditions such as an environment with high sugar concentration. By shedding that wall, the bacteria makes itself harder to detect by the antibiotics and our own immune system. That means that there is one less thing to differentiate the bacteria cell from our own human cell.

With a strong and healthy immune system, the L-form bacteria can eventually be destroyed. It is a little bit more complicated for people with weaker immune systems because they need help from antibiotics, but the antibiotics are ineffective because bacteria will stay in their L-form until the antibiotics leave the system, in which case the cell wall forms again.

Ultimately, there is no need to be worried that bacteria have evolved to consciously change its’ shape to avoid being targeted by our immune system or by antibiotics because it doesn’t. All the bacteria is doing is performing the functions it is programmed to do, like setting up protection against a hostile environment whether it is with a cell wall or without one.

-Sharon Li