The Other Side of the Coin

Here’s hoping everyone had a wonderful Father’s Day. During our relaxed celebration for Bear, I found myself ruminating about how many times we’ve celebrated this holiday for fathers no longer with us and how many more times  we would be able to celebrate it for the fathers who are. They are aging. Wait a minute, that means their kidneys are aging, too.

Yep, that meant a new blog topic. We already know that kidney function declines with age. According to the National Kidney Foundation at https://www.kidney.org/blog/ask-doctor/what-age-do-kidneys-decline-function, “The general ‘Rule of Thumb’ is that kidney function begins to decline at age 40 and declines at a rate of about 1% per year beyond age forty. Rates may differ in different individuals.” 40?

Well, what is a perfect kidney function score… if such exists? Back  to the NKF, although they call this a ‘normal’ not ‘perfect’ GFR, this time at https://www.kidney.org/atoz/content/gfr:

In adults, the normal GFR number is more than 90. GFR declines with age, even in people without kidney disease.
Average estimated GFR
20–29     116
30–39     107
40–49     99
50–59     93
60–69     85
70+         75

Got it. So even for a normal 70+ person, I have CKD with my 50ish GFR.

It seems I’m getting a bit ahead of myself here. I haven’t defined GFR yet. Let’s take a gander at What Is It and How Did I Get It? Early Stage Chronic Kidney Disease for that definition,

“Glomerular filtration rate [if there is a lower case “e” before the term, it means estimated glomerular filtration rate] which determines both the stage of kidney disease and how well the kidneys are functioning.”

No, that won’t do. I think we need more of an explanation. This is from SlowItDownCKD 2015:

“Glomerular filtration rate (GFR) is a test used to check how well the kidneys are working. Specifically, it estimates how much blood passes through  the glomeruli each minute. Glomeruli are the tiny filters in the kidneys that filter waste from the blood.

Many thanks to MedlinePlus at http://www.nlm.nih.gov/medlineplus/ency/article/007305.htm for the definition.”

Okay, I think that’s clear now. However, that’s not what I wanted to know. This is – if kidney function already declines with age, does having CKD age us more quickly?

Premature aging is a process associated with a progressive accumulation of deleterious changes over time, an impairment of physiologic functions, and an increase in the risk of disease and death. Regardless of genetic background, aging can be accelerated by the lifestyle choices and environmental conditions to which our genes are exposed. Chronic kidney disease is a common condition that promotes cellular senescence and premature aging through toxic alterations in the internal milieu. This occurs through several mechanisms, including DNA and mitochondria damage, increased reactive oxygen species generation, persistent inflammation, stem cell exhaustion, phosphate toxicity, decreased klotho expression, and telomere attrition….”

You can read the entire fascinating (to my way of thinking) American Journal of Kidney Disease article at http://www.natap.org/2013/HIV/PIIS0272638612015922.pdf.

Nature.com at http://www.nature.com/nrneph/journal/v10/n12/full/nrneph.2014.185.html seems to agree that CKD accelerates aging:

“Chronic kidney disease (CKD) shares many phenotypic similarities with other chronic diseases, including heart failure, chronic obstructive pulmonary disease, HIV infection and rheumatoid arthritis. The most apparent similarity is premature ageing, involving accelerated vascular disease and muscle wasting. We propose that in addition to a sedentary lifestyle and psychosocial and socioeconomic determinants, four major disease-induced mechanisms underlie premature ageing in CKD: an increase in allostatic load, activation of the ‘stress resistance response’, activation of age-promoting mechanisms and impairment of anti-ageing pathways. The most effective current interventions to modulate premature ageing—treatment of the underlying disease, optimal nutrition, correction of the internal environment and exercise training—reduce systemic inflammation and oxidative stress and induce muscle anabolism. Deeper mechanistic insight into the phenomena of premature ageing as well as early diagnosis of CKD might improve the application and efficacy of these interventions and provide novel leads to combat muscle wasting and vascular impairment in chronic diseases.”

Remember the friend of my daughter’s who hadn’t seen me in five years who (thought) he whispered to her, “Your mom got so old.” Now I understand why, although I have noticed this myself. I look in the mirror and see the bags under my eyes that are not errant eye liner. I see the lines in my faces, especially around my mouth, that weren’t there just a year ago. I see the stubborn fat around my middle that frustrates me no end. I see that it takes me forever (okay, so I’m being figurative here, folks) to recover from the flu, and I see how easily I become – and stay – tired. The dancer in me screams, “No fair!” The adult patient in me says, “Deal with it,” so I do.

I’ve used quite a bit of advanced terminology today, but haven’t explained a great deal of it in the hopes that when you read these articles their meanings will become clear in context. If they don’t, please leave me a comment and I will explore each one of them in future blogs. Who knows? Maybe I’ll need to devote an entire blog to whichever term it is you’d like to know more about.

Don’t let our premature aging get you down. We can work against it and, hopefully, slow it down just as we do with the progress of the decline in our kidney function.

I have been saving this bit of news for the last item in today’s blog. The world is not going to suffer if it doesn’t know about my photography, my teaching ,writing, or acting careers. But, when it comes to CKD, my writing can add something for those 31 million people who have it…especially the 90% that haven’t been diagnosed yet. What I did was completely change my web site so that it deals only with my Chronic Kidney Disease Awareness Advocacy (It’s all caps because that’s the way I think of it.) under the umbrella of SlowItDownCKD. I have to admit, I was surprised to see how active I’ve been in the last decade. It’s different when you see your work listed all in one place. Take a look at www.gail-raegarwood.com and tell me what you think, would you?

Until next week,

Keep living your life!

 

 

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