Saturday, April 21, 2018

Johns Hopkins researchers invent new class of immunotherapy drugs to fight cancer

Johns Hopkins researchers have invented a new class of cancer immunotherapy drugs that are more effective at harnessing the power of the immune system to fight cancer. This new approach, which was reported in Nature Communications, results in a significant decrease of tumor growth, even against cancers that do not respond to existing immunotherapy.
"The immune system is naturally able to detect and eliminate tumor cells. However, virtually all cancers -; including the most common cancers, from lung, breast and colon cancers to melanomas and lymphomas -; evolve to counteract and defeat such immune surveillance by co-opting and amplifying natural mechanisms of immune suppression," says Atul Bedi, M.D., M.B.A., an associate professor of otolaryngology -; head and neck surgery at the Johns Hopkins University School of Medicine, and senior author of the study.
Major way tumors evade the immune system is via regulatory T cells (Tregs), a subset of immune cells that turn off the immune system's ability to attack tumor cells. Tumors are frequently infiltrated by Tregs, and this is strongly correlated with poor outcome in multiple cancer types.
Many tumors produce high levels of a protein that promotes the development of Tregs. Bedi's team reasoned that since Tregs in the tumor shut down immune responses against tumor cells, turning off Tregs may help immunotherapy work better.
"This is especially challenging because Tregs are not only induced by the TGF-beta (transforming growth factor-beta) protein made by tumor cells but make their own TGF-beta to maintain their identity and function in the tumor," says Bedi. Tregs also make cytotoxic T-lymphocyte associated protein 4 (CTLA-4), which prevents anti-tumor immune cells from acting.
To address this problem, the researchers invented a new class of immunotherapy drugs they called Y-traps. Each Y-trap molecule is an antibody shaped like a Y and fused to a molecular "trap" that captures other molecules nearby, rendering them useless.
The researchers first designed a Y-trap that targets CTLA-4 and traps TGF-beta. This Y-trap disables both CTLA-4 and TGF-beta, which allows anti-tumor immune cells to fight the tumor and turns down Treg cells.
To test the Y-traps, the team transplanted human cancer cells into mice engineered to have human immune cells. The researchers found that their Y-trap eliminated Treg cells in tumors and slowed the growth of tumors that failed to respond to ipilimumab, a current immunotherapy drug that targets the CTLA-4 protein.
"Tregs have long been a thorn in the side of cancer immunotherapy," says Bedi. "We've finally found a way to overcome this hurdle with this CTLA-4-targeted Y-trap."
Antibodies to another immune checkpoint protein, PD-1, or its ligand (PD-L1), are a central focus of current cancer immunotherapy. While they work in some patients, they don't work in the vast majority of patients.
The research team designed a Y-trap targeting PD-L1 and trapping TGF-beta. Tested against the same engineered mice, they found that their Y-trap works better than just PD-L1-targeting drugs atezolizumab and avelumab. Again, this Y-trap slowed the growth of tumors that previously had not responded to drugs.
"These first-in-class Y-traps are just the beginning. We have already invented a whole family of these multifunctional molecules based on the Y-trap technology. Since mechanisms of immune dysfunction are shared across many types of cancer, this approach could have broad impact on improving cancer immunotherapy," says Bedi. "Y-traps could also provide a therapeutic strategy against tumors that resist current immune checkpoint inhibitors."
"This approach appears to be an innovative strategy, and an exciting technical accomplishment to target multiple suppressive mechanisms in the tumor microenvironment," says Robert Ferris, M.D., Ph.D., professor of oncology and director of the Hillman Cancer Center at the University of Pittsburgh. Ferris was not connected with the study. "I look forward to seeing its translation into the clinic."
Bedi envisions using Y-traps not only for treatment of advanced, metastatic cancers but also as a neoadjuvant therapy to create a "vaccine" effect -; that is, giving them to patients before surgery to prevent recurrence of the disease.

I am 70 Years Old and I Do Not Have a Single Joint Pain; I Will Let You Know My Solution

If you have some time with a knee pain, you have a hard time walking, and you spend a lot of time in bed due to pain. However, today I want to teach you the best natural treatment to fight these terrible pains and to be able to walk again and perform normally in your daily life.
The reality is that this remedy is a shake that you can use both as a drink and as an ointment. The best thing about this is that you can do it yourself from the comfort of your home, with ingredients that you probably have in your fridge.

So if you want to end these terrible joint pain, read to the end and learn to prepare it. Do you want to know more? Keep Reading …

Undoubtedly, joint pain is still a challenge with which traditional medicine has not yet been able to give a concrete and effective response. So far there are only treatments to relieve joint discomfort through anti-inflammatory drugs and that can produce certain effects at the stomach level.
Conditions such as osteoarthritis or arthritis that cause joint pain almost permanently are very difficult to treat. These diseases are leading to a definite and secure immobility, therefore these people are forced to use canes or lie down for a long time.
Due to this, we must mention that there is a very effective Russian remedy in natural medicine that will help you with joint pain, in addition to working to slow down the progression of the disease. That’s why today we will introduce you how to prepare it.
Remedy for joint pain:
-1 eggplant
-1 liter of water
In a pot until it boils. Remove from the heat and place the sliced aubergine inside the hot water.
Let the water cool and when you take room temperature strain the preparation. You must store 750 ml of this mixture on one side and keep the rest in another container.
For internal use:
The 750 ml that you set aside before, you should divide it into three shots throughout the day in the following way: one take on an empty stomach, the second take before lunch and the last before going to sleep.
For external use:
The remaining 250 ml you should add 50 ml of olive oil. Mix well both ingredients and apply on painful areas rubbing gently before going to sleep. It is necessary to keep the affected areas warm, it is best to place a cloth with a bandage to keep it in place.