Medicine and Health
You might not know much about this small organ, but it’s very important
There is a gland in your neck that is about the length of a paperclip but has a huge effect on your whole body. Its two lobes sit between your tracheas. It’s probably your thyroid, and you haven’t given it much thought until something went wrong with it. Let me tell you about this simple organ, the two hormones it makes, and how they affect the body.
What does the thyroid do?
The thyroid is part of the endocrine system because it is a gland, which is an organ that makes a substance. In this case, it makes hormones.
The thyroid is in the front of the neck, below the larynx. It has two lobes, the left and right, which sit on either side of the trachea, or windpipe. An isthmus connects the two lobes. Most of the time, you can’t see or feel it.
A gland at the base of the brain called the pituitary gland sends signals to the thyroid. The pituitary gland releases thyroid-stimulating hormone (TSH) throughout the day. This hormone tells the thyroid to make sure it is producing the right amounts of two different hormones to meet the body’s changing needs.
Thyroxine, which is also known as T4, and triiodothyronine, or T3, are hormones that the thyroid makes. Additionally, a small collection of cells in the thyroid produces calcitonin.
What do the hormones in the thyroid do?
While T4 is the main hormone the thyroid makes, it is also the least active. It goes to different parts of the body’s tissues and is mostly changed into T3. Around 80% of T3 is made this way, and the other 20% is released directly into the bloodstream from the thyroid.
T3 and T4 are both important for the body’s metabolism to work right. They also help with digestion, brain development, bone and muscle health, and the heart.
Calcium and phosphate levels in the blood are kept in check by calcitonin. It controls calcium levels in two ways: first, it stops osteoclasts from breaking down bone, which stops extra calcium from being released; second, it stops the kidneys from reabsorbing calcium.
Not sure how important this function is, though, since people with very high or very low calcitonin don’t seem to have any problems.
What takes place when the thyroid doesn’t work right?
Keeping the right balance of T3 and T4 is important for many body systems to work properly. What do you do when things go wrong?
Being hypothyroid
Most of the time, people with hypothyroidism (an underactive thyroid) have problems with their organ. People don’t believe it is preventable; the majority of cases are the result of an autoimmune reaction (Hashimoto’s disease) or are a side effect of treating other illnesses. The condition can be passed down from parent to child, but babies born in many countries, including the US and UK, are checked for it soon after they are born.
Because the symptoms show up slowly, sometimes over years, it can be hard to tell what’s wrong. These are the main signs:
- Fatigue
- Weight gain
- Depression
- Muscle aches
- Dry skin and hair
- Increased sensitivity to the cold
Women are more likely than men to have hypothyroidism. If you want to get your levels back to normal, you need to take a synthetic form of the thyroxine hormone. Getting the hormone levels back in balance usually takes away the symptoms, but treatment needs to go on for a long time.
Being hyperthyroid
Hyperthyroidism, or an overactive thyroid, is the opposite of this. Usually, these are the symptoms:
- ncreased appetite
- Weight loss
- Rapid or irregular heartbeat
- Irritability
- Sweating
- Shaky hands
- Frequent bowel movements
Some people who have either an underactive or overactive thyroid also get a goiter, which is when the thyroid swells up and can be seen in the neck. Even though this doesn’t always lead to big problems, it could make it hard to breathe and swallow.
People with hypothyroidism are sometimes given too much synthetic thyroxine, which can lead to hyperthyroidism. It may take a few tries to find the right dose. Some other reasons are having an autoimmune disease called Graves’ disease, having thyroid inflammation, or eating too much iodine.
Radioiodine therapy is a common way to treat hyperthyroidism. To do this, a capsule or liquid with the radioactive isotope iodine-131 must be taken. This destroys only the cells in the thyroid that make thyroxine. This doesn’t hurt other parts of the body, but for most people, it lowers the production of thyroxine so much that they later develop hypothyroidism.
It is better to treat hyperthyroidism this way, even if it goes too far, because hypothyroidism can be treated with man-made hormones and doesn’t cause as many long-term health problems.
Surgery to remove part or all of the thyroid is another option that is sometimes used. This can also lead to hypothyroidism afterward.
Breast cancer
The thyroid gland can get different kinds of cancer. Papillary thyroid cancer is the most common type. People in this age group are most likely to get it. Most papillary thyroid tumors are small, grow very slowly, and are easy to treat.
To get rid of the thyroid, most people need surgery. That will lead to hypothyroidism, which needs to be treated with medicine, as we’ve seen. Radiotherapy or radioactive iodine therapy may also be used, but chemotherapy is usually not needed unless the cancer comes back.
Scientists are still not sure what causes thyroid cancer. Radiation exposure is a major risk factor, which is why more people with this cancer have been found in areas that were close to nuclear accidents like Chernobyl.
Having postpartum thyroiditis
Postpartum thyroiditis is a problem that happens to 5–10% of pregnant women. It happens when the immune system attacks the thyroid soon after giving birth, causing inflammation. People who already have an autoimmune thyroid condition are more likely to get it.
The condition starts with a hyperthyroid phase, in which too much thyroid hormone gets into the bloodstream. It then changes to a hypothyroid phase, which can last for months or even permanently. How you’re treated will depend on how bad your symptoms are and whether your hormone levels return to normal in the end.
In the end,
It takes a full-time job to keep the wide range of hormones that the body makes in perfect balance. It doesn’t matter how small the change is; it can have big effects. Since the thyroid is such a small organ, it plays a big part in that. If you haven’t thought about it before, maybe now you will.
Medicine and Health
A recently identified strain of deadly fungus poses a significant risk to public health
Researchers have recently discovered a new group of Candida auris, a potentially dangerous pathogen. The finding increases the total number of identified clades of the fungus, which is a newly emerging superbug resistant to multiple drugs, to six.
Candida auris is a strain of yeast that has the potential to cause serious illness and is frequently impervious to antifungal drugs. While individuals who are in good health generally do not fall ill, the transmission of the disease is highly prevalent within medical institutions and poses a significant risk to individuals with compromised immune systems. The yeast can induce a variety of conditions ranging from superficial infections of the skin to more severe and life-threatening illnesses, such as bloodstream infections. Due to its high level of resistance to multiple drugs, treating it can be challenging, and in some cases, even impossible.
The authors state that the pathogen is a significant global public health threat due to its widespread distribution, resistance to multiple drugs, high ability to spread, tendency to cause outbreaks, and high mortality rate. Although infections are still relatively uncommon, there has been a significant increase in cases in recent years.
Previously, the fungus had been categorized into five distinct clades, each located in different geographic regions: South Asia, East Asia, Africa, South America, and Iran.
In April 2023, doctors from the Singapore General Hospital identified a patient carrying a unique strain of C. auris as part of a routine screening program, adding it as the most recent clade to be discovered. Typically, these cases arise from individuals who have recently traveled, but this particular patient had not traveled outside the country for a period of two years, which raised some concerns.
Upon conducting a genetic analysis of the strain, the researchers determined that it did not align with any of the five known clades of the fungus. Therefore, it can be concluded that the strain belongs to a previously unidentified, sixth clade. Subsequently, they conducted tests on strains obtained from previous patients and identified two additional isolates of this particular group of C. auris in Singapore, as well as another isolate in Bangladesh.
The extent of the new clade’s prevalence and its potential to cause invasive infections and outbreaks remains uncertain at present. However, the researchers emphasize the importance of promptly identifying and controlling it in order to safeguard patient well-being.
“The ramifications of this breakthrough transcend the confines of the laboratory.” “Given the recent discovery of the sixth Candida auris clade, it is imperative to enhance surveillance capability or create new methods to strengthen existing surveillance strategies. This will enable health care facilities to closely monitor its emergence and effectively control its spread,” stated Dr. Karrie Ko, co-first author of the study.
Fortunately, the cases described in the study remained vulnerable to all antifungals that were tested. This should alleviate concerns about a pandemic similar to the one depicted in The Last Of Us. However, it is evident that the threat of C. auris is persistent. Therefore, additional efforts are required to identify new strains, monitor their spread, and control any negative clinical consequences.
The research is published in The Lancet Microbe journal.
Medicine and Health
What makes your chest hurt when something makes you jump?
Have you ever been scared so badly that you grabbed your chest? You feel like someone or something just zapped you behind the sternum. As you rest, you lean against the wall and think about why your friend is such a jerk and why you can feel it in your chest whenever you get scared.
People often use words like “heart-stopping” when they write fiction about fear, but the science of fear tells us that this isn’t what’s happening because it wouldn’t make sense. Our bodies are getting ready to deal with an impending threat when we’re scared, and going into cardiac arrest wouldn’t help us get very far if a lion was after us.
What do we do when we’re scared?
The sympathetic nervous system is what gets you excited when something makes you jump. It’s a tool inside our bodies that releases hormones and changes the way our bodies work to get us ready for the fight-or-flight response.
One important part is adrenaline, which is also known as epinephrine. The adrenal glands squeeze it out into the blood. The heart starts beating faster, sending more blood to your muscles and organs right away. Because they need all the oxygen they can get if they want to get away from a dangerous animal.
How do you feel when you go for a run?
Anyone who has ever used an EpiPen knows how bad it is to feel a sudden rush of adrenaline. It’s a stress hormone that makes you feel nervous and anxious, like you would before doing a bungee jump. Getting a rush when you think about a traumatic event from the past can be a sign of PTSD.
A medicine called adrenaline is used because it can help people who are having a medical emergency. If you have anaphylaxis from an allergen like peanuts, this can help because it can open your airway. Because it changes the strength and speed of heartbeats, it is also sometimes used to help people who are having a cardiac arrest.
When your adrenaline level goes up quickly, you may feel shaky, your heart beat quickly, and your chest get tight. When you add in the fact that you’re more alert, you become very aware of the changes in your body. This is especially clear when you’re not in danger, like when your partner surprised you at home when you thought you were alone.
When you’re scared, your sympathetic nervous system usually kicks in, which is normal. But, some heart conditions can get worse when you’re scared. Should anyone be having chest pain or ongoing discomfort, they should see a doctor. In the end, it is possible to be so scared that you die.
This article is not meant to be a replacement for medical advice, diagnosis, or treatment from a trained professional. If you have questions about a medical condition, you should always talk to a qualified health professional.
Medicine and Health
The Lacks family is suing again over her “stolen” cells
The family of Henrietta Lacks has filed a new lawsuit against two sizable drug companies for using her genetic material without her consent.
In the US District Court for the District of Maryland, Lacks’ living relatives are suing Novartis Pharmaceuticals Corporation, Novartis Gene Therapies, Inc., Viatris, Inc., and its subsidiary, Mylan Pharmaceuticals. They say the companies have used the “stolen” HeLa cell line to make hundreds of patents and have made a lot of money from it.
The suit wants the money made from using these cells to be “rightfully transferred” to Henrietta Lacks’s estate.
Novartis and Viatris chose to sell Henrietta Lacks’ living genetic material. Lacks was a black grandmother, community leader, and woman whose doctors took her tissue without her knowledge or permission, according to Chris Ayers, an attorney at Seeger Weiss LLP who is representing the Lacks family.
Ayers added, “We will keep looking for justice for Mrs. Lacks and her family.”
Henrietta Lacks died on October 4, 1951, from cervical cancer. She was 31 years old. Some of her cells are still alive today. A doctor at Johns Hopkins Hospital took a sample of her cervical cells without her knowledge just before she died. They were doing a cancer check. It was seen that her cells kept multiplying quickly, even after most of the cells in other samples would have died without their host.
Because scientists saw the potential, they found that these cells could be a cheap and easy way to help researchers do more research. The “HeLa immortal cell line” is what scientists call these cells, and they are very useful for biomedical research.
Over 75,000 scientific studies around the world have used these cells, which amount to about 55 million tons. They have been very important in making progress in areas like polio vaccines, cancer treatments, HIV/AIDS treatments, and much more.
All of this was done, though, without Lacks’ knowledge or permission. For many years, her family also didn’t know that the cells were being used for business.
Selling HeLa cells for money brings up important issues in medical ethics and genetics. As a black woman living in America in the 1950s, Lacks’ case shows how medical racism still affects minorities who aren’t getting enough help.
Even though a lot of people know about these problems, HeLa cells are still used in medical research for profit, which makes some companies a lot of money.
“Now that everyone knows Henrietta Lacks’ story, it’s shocking, but not surprising, that drug companies like Novartis and Viatris are still making money off of the deeply unethical origins of HeLa cells and the disturbing history of medical racism,” said Chris Seeger, another lawyer for the family.
A historic deal was made by Lacks’ family in 2023 after they sued Thermo Fisher Scientific, Inc., another biotech company, in the US District Court for the District of Baltimore. During that time, the lawyers said that the settlement was only the beginning and that there could be many more lawsuits about the use of HeLa cells.
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