Viruses aren’t always harmful. 6 ways they’re used in health care and pest control
10almonds is reader-supported. We may, at no cost to you, receive a portion of sales if you purchase a product through a link in this article.
We tend to just think of viruses in terms of their damaging impacts on human health and lives. The 1918 flu pandemic killed around 50 million people. Smallpox claimed 30% of those who caught it, and survivors were often scarred and blinded. More recently, we’re all too familiar with the health and economic impacts of COVID.
But viruses can also be used to benefit human health, agriculture and the environment.
Viruses are comparatively simple in structure, consisting of a piece of genetic material (RNA or DNA) enclosed in a protein coat (the capsid). Some also have an outer envelope.
Viruses get into your cells and use your cell machinery to copy themselves.
Here are six ways we’ve harnessed this for health care and pest control.
1. To correct genes
Viruses are used in some gene therapies to correct malfunctioning genes. Genes are DNA sequences that code for a particular protein required for cell function.
If we remove viral genetic material from the capsid (protein coat) we can use the space to transport a “cargo” into cells. These modified viruses are called “viral vectors”.
DEXi
Viral vectors can deliver a functional gene into someone with a genetic disorder whose own gene is not working properly.
Some genetic diseases treated this way include haemophilia, sickle cell disease and beta thalassaemia.
2. Treat cancer
Viral vectors can be used to treat cancer.
Healthy people have p53, a tumour-suppressor gene. About half of cancers are associated with the loss of p53.
Replacing the damaged p53 gene using a viral vector stops the cancerous cell from replicating and tells it to suicide (apoptosis).
Viral vectors can also be used to deliver an inactive drug to a tumour, where it is then activated to kill the tumour cell.
This targeted therapy reduces the side effects otherwise seen with cytotoxic (cell-killing) drugs.
We can also use oncolytic (cancer cell-destroying) viruses to treat some types of cancer.
Tumour cells have often lost their antiviral defences. In the case of melanoma, a modified herpes simplex virus can kill rapidly dividing melanoma cells while largely leaving non-tumour cells alone.
3. Create immune responses
Viral vectors can create a protective immune response to a particular viral antigen.
One COVID vaccine uses a modified chimp adenovirus (adenoviruses cause the common cold in humans) to transport RNA coding for the SARS-CoV-2 spike protein into human cells.
The RNA is then used to make spike protein copies, which stimulate our immune cells to replicate and “remember” the spike protein.
Then, when you are exposed to SARS-CoV-2 for real, your immune system can churn out lots of antibodies and virus-killing cells very quickly to prevent or reduce the severity of infection.
4. Act as vaccines
Viruses can be modified to act directly as vaccines themselves in several ways.
We can weaken a virus (for an attenuated virus vaccine) so it doesn’t cause infection in a healthy host but can still replicate to stimulate the immune response. The chickenpox vaccine works like this.
The Salk vaccine for polio uses a whole virus that has been inactivated (so it can’t cause disease).
Others use a small part of the virus such as a capsid protein to stimulate an immune response (subunit vaccines).
An mRNA vaccine packages up viral RNA for a specific protein that will stimulate an immune response.
5. Kill bacteria
Viruses can – in limited situations in Australia – be used to treat antibiotic-resistant bacterial infections.
Bacteriophages are viruses that kill bacteria. Each type of phage usually infects a particular species of bacteria.
Unlike antibiotics – which often kill “good” bacteria along with the disease-causing ones – phage therapy leaves your normal flora (useful microbes) intact.
Shutterstock
6. Target plant, fungal or animal pests
Viruses can be species-specific (infecting one species only) and even cell-specific (infecting one type of cell only).
This occurs because the proteins viruses use to attach to cells have a shape that binds to a specific type of cell receptor or molecule, like a specific key fits a lock.
The virus can enter the cells of all species with this receptor/molecule. For example, rabies virus can infect all mammals because we share the right receptor, and mammals have other characteristics that allow infection to occur whereas other non-mammal species don’t.
When the receptor is only found on one cell type, then the virus will infect that cell type, which may only be found in one or a limited number of species. Hepatitis B virus successfully infects liver cells primarily in humans and chimps.
We can use that property of specificity to target invasive plant species (reducing the need for chemical herbicides) and pest insects (reducing the need for chemical insecticides). Baculoviruses, for example, are used to control caterpillars.
Similarly, bacteriophages can be used to control bacterial tomato and grapevine diseases.
Other viruses reduce plant damage from fungal pests.
Myxoma virus and calicivirus reduce rabbit populations and their environmental impacts and improve agricultural production.
Just like humans can be protected against by vaccination, plants can be “immunised” against a disease-causing virus by being exposed to a milder version.
Thea van de Mortel, Professor, Nursing, School of Nursing and Midwifery, Griffith University
This article is republished from The Conversation under a Creative Commons license. Read the original article.
Don’t Forget…
Did you arrive here from our newsletter? Don’t forget to return to the email to continue learning!
Learn to Age Gracefully
Join the 98k+ American women taking control of their health & aging with our 100% free (and fun!) daily emails:
-
Tell Yourself a Better Lie – by Marissa Peer
10almonds is reader-supported. We may, at no cost to you, receive a portion of sales if you purchase a product through a link in this article.
As humans, we generally lie to ourselves constantly. Or perhaps we really believe some of the things we tell ourselves, even if they’re not objectively necessarily true:
- I’ll always be poor
- I’m destined to be alone
- I don’t deserve good things
- Etc.
Superficially, it’s easy to flip those, and choose to tell oneself the opposite. But it feels hollow and fake, doesn’t it? That’s where Marissa Peer comes in.
Our stories that we tell ourselves don’t start where we are—they’re generally informed by things we learned along the way. Sometimes good lessons, sometimes bad ones. Sometimes things that were absolutely wrong and/or counterproductive.
Peer invites the reader to ask “What if…”, unravel how the unhelpful lessons got wired into our brains in the first place, and then set about untangling them.
“Tell yourself a better lie” does not mean self-deceit. It means that we’re the authors of our own stories, so we might as well make them work for us. Many things in life are genuinely fixed; others are open to interpretation.
Sorting one from the other, and then treating them correctly in a way that’s helpful to us? That’s how we can stop hurting ourselves, and instead bring our own stories around to uplift and fortify us.
Get Your Copy of “Tell Yourself A Better Lie” on Amazon Today!
Share This Post
-
Why is toddler milk so popular? Follow the money
10almonds is reader-supported. We may, at no cost to you, receive a portion of sales if you purchase a product through a link in this article.
Toddler milk is popular and becoming more so. Just over a third of Australian toddlers drink it. Parents spend hundreds of millions of dollars on it globally. Around the world, toddler milk makes up nearly half of total formula milk sales, with a 200% growth since 2005. Growth is expected to continue.
We’re concerned about the growing popularity of toddler milk – about its nutritional content, cost, how it’s marketed, and about the impact on the health and feeding of young children. Some of us voiced our concerns on the ABC’s 7.30 program recently.
But what’s in toddler milk? How does it compare to cow’s milk? How did it become so popular?
What is toddler milk? Is it healthy?
Toddler milk is marketed as appropriate for children aged one to three years. This ultra-processed food contains:
- skim milk powder (cow, soy or goat)
- vegetable oil
- sugars (including added sugars)
- emulsifiers (to help bind the ingredients and improve the texture)
added vitamins and minerals.
Toddler milk is usually lower in calcium and protein, and higher in sugar and calories than regular cow’s milk. Depending on the brand, a serve of toddler milk can contain as much sugar as a soft drink.
Even though toddler milks have added vitamins and minerals, these are found in and better absorbed from regular foods and breastmilk. Toddlers do not need the level of nutrients found in these products if they are eating a varied diet.
Global health authorities, including the World Health Organization (WHO), and Australia’s National Health and Medical Research Council, do not recommend toddler milk for healthy toddlers.
Some children with specific metabolic or dietary medical problems might need tailored alternatives to cow’s milk. However, these products generally are not toddler milks and would be a specific product prescribed by a health-care provider.
Toddler milk is also up to four to five times more expensive than regular cow’s milk. “Premium” toddler milk (the same product, with higher levels of vitamins and minerals) is more expensive.
With the cost-of-living crisis, this means families might choose to go without other essentials to afford toddler milk.
Toddler milk is more expensive than cow’s milk and contains more sugar.
Dragana Gordic/ShutterstockHow toddler milk was invented
Toddler milk was created so infant formula companies could get around rules preventing them from advertising their infant formula.
When manufacturers claim benefits of their toddler milk, many parents assume these claimed benefits apply to infant formula (known as cross-promotion). In other words, marketing toddler milks also boosts interest in their infant formula.
Manufacturers also create brand loyalty and recognition by making the labels of their toddler milk look similar to their infant formula. For parents who used infant formula, toddler milk is positioned as the next stage in feeding.
How toddler milk became so popular
Toddler milk is heavily marketed. Parents are told toddler milk is healthy and provides extra nutrition. Marketing tells parents it will benefit their child’s growth and development, their brain function and their immune system.
Toddler milk is also presented as a solution to fussy eating, which is common in toddlers.
However, regularly drinking toddler milk could increase the risk of fussiness as it reduces opportunities for toddlers to try new foods. It’s also sweet, needs no chewing, and essentially displaces energy and nutrients that whole foods provide.
Toddler milk is said to help fussy eating, but it may make things worse.
zlikovec/ShutterstockGrowing concern
The WHO, along with public health academics, has been raising concerns about the marketing of toddler milk for years.
In Australia, moves to curb how toddler milk is promoted have gone nowhere. Toddler milk is in a category of foods that are allowed to be fortified (to have vitamins and minerals added), with no marketing restrictions. The Australian Competition & Consumer Commission also has concerns about the rise of toddler milk marketing. Despite this, there is no change in how it’s regulated.
This is in contrast to voluntary marketing restrictions in Australia for infant formula.
What needs to happen?
There is enough evidence to show the marketing of commercial milk formula, including toddler milk, influences parents and undermines child health.
So governments need to act to protect parents from this marketing, and to put child health over profits.
Public health authorities and advocates, including us, are calling for the restriction of marketing (not selling) of all formula products for infants and toddlers from birth through to age three years.
Ideally, this would be mandatory, government-enforced marketing restrictions as opposed to industry self-regulation in place currently for infant formulas.
We musn’t blame parents
Toddlers are eating more processed foods (including toddler milk) than ever because time-poor parents are seeking a convenient option to ensure their child is getting adequate nutrition.
Formula manufacturers have used this information, and created a demand for an unnecessary product.
Parents want to do the best for their toddlers, but they need to know the marketing behind toddler milks is misleading.
Toddler milk is an unnecessary, unhealthy, expensive product. Toddlers just need whole foods and breastmilk, and/or cow’s milk or a non-dairy, milk alternative.
If parents are worried about their child’s eating, they should see a health-care professional.
Anthea Rhodes, a paediatrician from Royal Children’s Hospital Melbourne and a lecturer at the University of Melbourne, co-authored this article.
Jennifer McCann, Lecturer Nutrition Sciences, Institute for Physical Activity and Nutrition, Deakin University; Karleen Gribble, Adjunct Associate Professor, School of Nursing and Midwifery, Western Sydney University, and Naomi Hull, PhD candidate, University of Sydney
This article is republished from The Conversation under a Creative Commons license. Read the original article.
Share This Post
-
Relationships: When To Stick It Out & When To Call It Quits
10almonds is reader-supported. We may, at no cost to you, receive a portion of sales if you purchase a product through a link in this article.
Like A Ship Loves An Anchor?
Today’s article may seem a little bit of a downer to start with, but don’t worry, it picks up again too. Simply put, we’ve written before about many of the good parts of relationships, e.g:
Only One Kind Of Relationship Promotes Longevity This Much!
…but what if that’s not what we have?
Note: if you have a very happy, secure, fulfilling, joyous relationship, then, great! Or if you’re single and happy, then, also great! Hopefully you will still find today’s feature of use if you find yourself advising a friend or family member one day. So without further ado, let’s get to it…
You may be familiar with the “sunk cost fallacy”; if not: it’s what happens when a person or group has already invested into a given thing, such that even though the thing is not going at all the way they hoped, they now want to continue trying to make that thing work, lest their previous investment be lost. But the truth is: if it’s not going to work, then the initial investment is already lost, and pouring out extra won’t help—it’ll just lose more.
That “investment” in a given thing could be money, time, energy, or (often the case) a combination of the above.
In the field of romance, the “sunk cost fallacy” keeps a lot of bad relationships going for longer than perhaps they should, and looking back (perhaps after a short adjustment period), the newly-single person says “why did I let that go on?” and vows to not make the same mistake again.
But that prompts the question: how can we know when it’s right to “keep working on it, because relationships do involve work”, as perfectly reasonable relationship advice often goes, and when it’s right to call it quits?
Should I stay or should I go?
Some questions for you (or perhaps a friend you might find yourself advising) to consider:
- What qualities do you consider the most important for a partner to have—and does your partner have them?
- If you described the worst of your relationship to a close friend, would that friend feel bad for you?
- Do you miss your partner when they’re away, or are you glad of the break? When they return, are they still glad to see you?
- If you weren’t already in this relationship, would you seek to enter it now? (This takes away sunk cost and allows a more neutral assessment)
- Do you feel completely safe with your partner (emotionally as well as physically), or must you tread carefully to avoid conflict?
- If your partner decided tomorrow that they didn’t want to be with you anymore and left, would that be just a heartbreak, or an exciting beginning of a new chapter in your life?
- What things would you generally consider dealbreakers in a relationship—and has your partner done any of them?
The last one can be surprising, by the way. We often see or hear of other people’s adverse relationship situations and think “I would never allow…” yet when we are in a relationship and in love, there’s a good chance that we might indeed allow—or rather, excuse, overlook, and forgive.
And, patience and forgiveness certainly aren’t inherently bad traits to have—it’s just good to deploy them consciously, and not merely be a doormat.
Either way, reflect (or advise your friend/family member to reflect, as applicable) on the “score” from the above questions.
- If the score is good, then maybe it really is just a rough patch, and the tools we link at the top and bottom of this article might help.
- If the score is bad, the relationship is bad, and no amount of historic love or miles clocked up together will change that. Sometimes it’s not even anyone’s fault; sometimes a relationship just ran its course, and now it’s time to accept that and turn to a new chapter.
“At my age…”
As we get older, it’s easy for that sunk cost fallacy to loom large. Inertia is heavy, the mutual entanglement of lives is far-reaching, and we might not feel we have the same energy for dating that we did when we were younger.
And there may sometimes be a statistical argument for “sticking it out” at least for a while, depending on where we are in the relationship, per this study (with 165,039 participants aged 20–76), which found:
❝Results on mean levels indicated that relationship satisfaction decreased from age 20 to 40, reached a low point at age 40, then increased until age 65, and plateaued in late adulthood.
As regards the metric of relationship duration, relationship satisfaction decreased during the first 10 years of the relationship, reached a low point at 10 years, increased until 20 years, and then decreased again.❞
Source: Development of Relationship Satisfaction Across the Life Span: A Systematic Review and Meta-Analysis
And yet, when it comes to prospects for a new relationship…
- If our remaining life is growing shorter, then it’s definitely too short to spend in an unhappy relationship
- Maybe we really won’t find romance again… And maybe that’s ok, if w’re comfortable making our peace with that and finding joy in the rest of life (this widowed writer (hi, it’s me) plans to remain single now by preference, and her life is very full of purpose and beauty and joy and yes, even love—for family, friends, etc, plus the memory of my wonderful late beloved)
- Nevertheless, the simple fact is: many people do find what they go on to describe as their best relationship yet, late in life ← this study is with a small sample size, but in this case, even anecdotal evidence seems sufficient to make the claim reasonable; probably you personally know someone who has done so. If they can, so can you, if you so wish.
- Adding on to that last point… Later life relationships can also offer numerous significant advantages unique to such (albeit some different challenges too—but with the right person, those challenges are just a fun thing to tackle together). See for example:
An exploratory investigation into dating among later‐life women
And about those later-life relationships that do work? They look like this:
this one looks like the title says it all, but it really doesn’t, and it’s very much worth at least reading the abstract, if not the entire paper—because it talks a lot about the characteristics that make for happy or unhappy relationships, and the effect that those things have on people. It really is very good, and quite an easy read.
See again: Healthy Relationship, Healthy Life
Take care!
Share This Post
Related Posts
-
Instant Quiz Results, No Email Needed
10almonds is reader-supported. We may, at no cost to you, receive a portion of sales if you purchase a product through a link in this article.
❓ Q&A With 10almonds Subscribers!
Q: I like that the quizzes (I’ve done two so far) give immediate results , with no “give us your email to get your results”. Thanks!
A: You’re welcome! That’s one of the factors that influences what things we include here! Our mission statement is “to make health and productivity crazy simple”, and the unwritten part of that is making sure to save your time and energy wherever we reasonably can!
Don’t Forget…
Did you arrive here from our newsletter? Don’t forget to return to the email to continue learning!
Learn to Age Gracefully
Join the 98k+ American women taking control of their health & aging with our 100% free (and fun!) daily emails:
-
Most People Try The Wrong Way To Unshrimp Their Posture (Here’s How To Do It Better)
10almonds is reader-supported. We may, at no cost to you, receive a portion of sales if you purchase a product through a link in this article.
Many people try to correct posture by pulling the shoulders back and tucking in the chin, but that doesn’t work. Happily, there is a way that does! Kinesiologist Kyle Waugh demonstrates:
Defying gravity
The trick is simple, and is about how maintaining good posture needs to be unconscious and natural, not forced. After all, who is maintaining singular focus for 16 waking hours a day?
Instead, pay attention to how the body relates to gravity without excessive muscle tension, aligning the (oft-forgotten!) hips, and maintaining balance. The importance of hip position is really not to be underestimated, since in many ways the hips are a central axis of the body just as the spine is, and the spine itself sits in the hips.
A lot of what holds the body in poor posture tends to be localized muscle tensions, so address those with stretches and relaxation exercises.
For a few quick tests and exercises to try, enjoy:
Click Here If The Embedded Video Doesn’t Load Automatically!
Want to learn more?
You might also like to read:
6 Ways To Look After Your Back ← no video on this one, just 6 concepts that you can apply to your daily life
Take care!
Don’t Forget…
Did you arrive here from our newsletter? Don’t forget to return to the email to continue learning!
Learn to Age Gracefully
Join the 98k+ American women taking control of their health & aging with our 100% free (and fun!) daily emails:
-
Menopause can bring increased cholesterol levels and other heart risks. Here’s why and what to do about it
10almonds is reader-supported. We may, at no cost to you, receive a portion of sales if you purchase a product through a link in this article.
Menopause is a natural biological process that marks the end of a woman’s reproductive years, typically between 45 and 55. As women approach or experience menopause, common “change of life” concerns include hot flushes, sweats and mood swings, brain fog and fatigue.
But many women may not be aware of the long-term effects of menopause on the heart and blood vessels that make up the cardiovascular system. Heart disease accounts for 35% of deaths in women each year – more than all cancers combined.
What should women – and their doctors – know about these risks?
Hormones protect hearts – until they don’t
As early as 1976, the Framingham Heart Study reported more than twice the rates of cardiovascular events in postmenopausal than pre-menopausal women of the same age. Early menopause (younger than age 40) also increases heart risk.
Before menopause, women tend to be protected by their circulating hormones: oestrogen, to a lesser extent progesterone and low levels of testosterone.
These sex hormones help to relax and dilate blood vessels, reduce inflammation and improve lipid (cholesterol) levels. From the mid-40s, a decline in these hormone levels can contribute to unfavourable changes in cholesterol levels, blood pressure and weight gain – all risk factors for heart disease.
Speedkingz/Shutterstock 4 ways hormone changes impact heart risk
1. Dyslipidaemia– Menopause often involves atherogenic changes – an unhealthy imbalance of lipids in the blood, with higher levels of total cholesterol, triglycerides, and low-density lipoprotein (LDL-C), dubbed the “bad” cholesterol. There are also reduced levels of high-density lipoprotein (HDL-C) – the “good” cholesterol that helps remove LDL-C from blood. These changes are a major risk factor for heart attack or stroke.
2. Hypertension – Declines in oestrogen and progesterone levels during menopause contribute to narrowing of the large blood vessels on the heart’s surface, arterial stiffness and raise blood pressure.
3. Weight gain – Females are born with one to two million eggs, which develop in follicles. By the time they stop ovulating in midlife, fewer than 1,000 remain. This depletion progressively changes fat distribution and storage, from the hips to the waist and abdomen. Increased waist circumference (greater than 80–88 cm) has been reported to contribute to heart risk – though it is not the only factor to consider.
4. Comorbidities – Changes in body composition, sex hormone decline, increased food consumption, weight gain and sedentary lifestyles impair the body’s ability to effectively use insulin. This increases the risk of developing metabolic syndromes such as type 2 diabetes.
While risk factors apply to both genders, hypertension, smoking, obesity and type 2 diabetes confer a greater relative risk for heart disease in women.
So, what can women do?
Every woman has a different level of baseline cardiovascular and metabolic risk pre-menopause. This is based on their genetics and family history, diet, and lifestyle. But all women can reduce their post-menopause heart risk with:
- regular moderate intensity exercise such as brisk walking, pushing a lawn mower, riding a bike or water aerobics for 30 minutes, four or five times every week
- a healthy heart diet with smaller portion sizes (try using a smaller plate or bowl) and more low-calorie, nutrient-rich foods such as vegetables, fruit and whole grains
- plant sterols (unrefined vegetable oil spreads, nuts, seeds and grains) each day. A review of 14 clinical trials found plant sterols, at doses of at least 2 grams a day, produced an average reduction in serum LDL-C (bad cholesterol) of about 9–14%. This could reduce the risk of heart disease by 25% in two years
- less unhealthy (saturated or trans) fats and more low-fat protein sources (lean meat, poultry, fish – especially oily fish high in omega-3 fatty acids), legumes and low-fat dairy
- less high-calorie, high-sodium foods such as processed or fast foods
- a reduction or cessation of smoking (nicotine or cannabis) and alcohol
- weight-gain management or prevention.
Exercise can reduce post-menopause heart disease risk. Monkey Business Images/Shutterstock What about hormone therapy medications?
Hormone therapy remains the most effective means of managing hot flushes and night sweats and is beneficial for slowing the loss of bone mineral density.
The decision to recommend oestrogen alone or a combination of oestrogen plus progesterone hormone therapy depends on whether a woman has had a hysterectomy or not. The choice also depends on whether the hormone therapy benefit outweighs the woman’s disease risks. Where symptoms are bothersome, hormone therapy has favourable or neutral effects on coronary heart disease risk and medication risks are low for healthy women younger than 60 or within ten years of menopause.
Depending on the level of stroke or heart risk and the response to lifestyle strategies, some women may also require medication management to control high blood pressure or elevated cholesterol levels. Up until the early 2000s, women were underrepresented in most outcome trials with lipid-lowering medicines.
The Cholesterol Treatment Trialists’ Collaboration analysed 27 clinical trials of statins (medications commonly prescribed to lower cholesterol) with a total of 174,000 participants, of whom 27% were women. Statins were about as effective in women and men who had similar risk of heart disease in preventing events such as stroke and heart attack.
Every woman approaching menopause should ask their GP for a 20-minute Heart Health Check to help better understand their risk of a heart attack or stroke and get tailored strategies to reduce it.
Treasure McGuire, Assistant Director of Pharmacy, Mater Health SEQ in conjoint appointment as Associate Professor of Pharmacology, Bond University and as Associate Professor (Clinical), The University of Queensland
This article is republished from The Conversation under a Creative Commons license. Read the original article.
Don’t Forget…
Did you arrive here from our newsletter? Don’t forget to return to the email to continue learning!
Learn to Age Gracefully
Join the 98k+ American women taking control of their health & aging with our 100% free (and fun!) daily emails:
