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Osteoarthritis - a Complex (Metabolic) System

Dr. J | American Board of Internal Medicine certified Nephrologist and Internal Medicine specialist with over 30 years of clinical experience

Osteoarthritis is oftentimes characterized in simple terms - typically referred to as a “wear and tear” injury to a specific joint. This usually involves the weight bearing joints of the body such as the lower back (lumbar spine), the hips, or the knees but can also include common repetitive use joints such as the fingers/toes and also the ankle (especially if historical trauma/injury is noted).


In actuality - osteoarthritis is a complex system with many mediators that can affect degradation of joints/cartilage. There are multiple mechanisms that can help trigger erosive joint disease - including several metabolic triggers. In this excellent review by Wang/Hunter et al from Osteoarthritis and Cartilage - they have an interesting info graphic highlighting potential metabolic contributors to OA (shared below). 

Metabolic osteoarthritis refers to triggered inflammation and subsequent joint erosion associated with metabolic risk factors. Let us go through some of these potential metabolic triggers for osteoarthritis:


  1. Metabolic Syndrome - a group of five conditions that can lead to heart disease, diabetes, stroke and other health problems (including Osteoarthritis). Metabolic syndrome is diagnosed when someone has three or more of these risk factors:



2.  Elevated body mass index (BMI) - The CDC lists general guidelines for adult body mass indexes. BMI is a person’s weight in kilograms divided by the square of height in meters. A high BMI can indicate high body fat levels (but not in all instances)


  • If your BMI is less than 18.5, it falls within the underweight range.
  • If your BMI is 18.5 to <25, it falls within the healthy weight range.
  • If your BMI is 25.0 to <30, it falls within the overweight range.
  • If your BMI is 30.0 or higher, it falls within the obesity range.


Obesity is frequently subdivided into categories:


  • Class 1: BMI of 30 to < 35
  • Class 2: BMI of 35 to < 40
  • Class 3: BMI of 40 or higher. Class 3 obesity is sometimes categorized as “severe” obesity.


People who have obesity, compared to those with a normal or healthy weight, are at increased risk for many serious diseases and health conditions, including the following:


  • All-causes of death (mortality)
  • High blood pressure (Hypertension)
  • High LDL cholesterol, low HDL cholesterol, or high levels of triglycerides (Dyslipidemia)
  • Type 2 diabetes
  • Coronary heart disease
  • Stroke
  • Gallbladder disease
  • Osteoarthritis (a breakdown of cartilage and bone within a joint)
  • Sleep apnea and breathing problems
  • Many types of cancer - such as gastric, endometrial, kidney, liver ca, and many more
  • Low quality of life scores
  • Mental illness such as clinical depression, anxiety, and other mental disorders
  • Body pain and difficulty with physical functioning


Our focus in this blog is on the body pain component - particularly arthropathy associated with elevated BMI.  Being overweight/obese is a clear risk factor for developing OA. Population-based studies have consistently shown a link between overweight or obesity and knee OA. Estimating prevalence across populations is difficult since definitions for obesity and knee OA vary among investigators. Data from the first National Health and Nutrition Examination Survey (HANES I) indicated that women with a BMI over 30 had nearly 4 times the risk of knee OA as compared with non-obese women; for obese men, the risk was nearly 5 times greater. 


3. Elevated Waist Circumference - there is a long standing association between waist circumference and various disease risks. In a long term 13 year follow up study by Larsson et al - there were strong associations between an elevated waist to hip circumference ratio with occurrence of stroke (p = 0.002) and ischemic heart disease (p = 0.04). There also is strong data between waist circumference and elevated risks of diabetes mellitus. There is even strong correlation data between waist circumference and overall mortality (death) risks. In this study by Batsis et al  - they evaluated physical effects of waist circumference and noted higher waist circumferences are associated with lower quality of life, a decline in physical function, and a slightly higher risk of disability over time with higher general arthritis rates. 


4. Adipose (fatty tissue) derived inflammation (cytokine up-regulation) -  Data also shows that it is not weight and sheer force impact on the joints itself that is the root cause of degradation of a joint space. There is a complex inflammatory environment that adipose tissue seems to help facilitate. In an
article by Wang et al - they noted obese individuals and study animals showed a higher level of serum tumor necrosis factor-alpha (TNF-α), interleukin-1 beta (IL)-1β and IL-6, all of which are produced by macrophages derived from adipose tissue. These are commonly known pro-inflammatory cytokines that data shows are typically elevated in the synovial fluid, synovial membrane, subchondral bone and cartilage of osteoarthritis patients -confirming their important roles in OA pathogenesis.


5. Glucose (sugar) issues -  data has long shown a correlation with elevated blood glucose levels (diabetes) and risk of arthritis. In this study by Schett et al - Rates of arthroplasty (95% CI) were 17.7 per 1,000 person-years in patients with type 2 diabetes and 5.3 per 1,000 person-years in those without (P < 0.001). Type 2 diabetes emerged as an independent risk predictor for arthroplasty(P < 0.001) in an unadjusted analysis and 2.1(P = 0.023) after adjustment for age, BMI, and other risk factors for OA.


6. Hormonal changes -  as individuals age - there are multiple hormonal changes that occur.
Estrogen levels typically decrease in females and testosterone levels decrease in males which can potentially contribute to a plethora of clinical symptoms. There has been varying data on hormonal effects on joint disease and also whether hormonal therapy can impact symptoms of osteoarthritis.


So an interesting review here on arthritis and the complex factors that may be contributing to progression. Sending good vibes and wishing everyone the absolute best. Feel free to reach out anytime with any questions. Stay healthy, stay active, and stay safe everyone!

By Dr. J | American Board of Internal Medicine certified Nephrologist and Internal Medicine specialist with over 30 years of clinical experience 20 Nov, 2022
We all know the importance of staying active and exercising. It is advice we have heard many times as we navigate the twists and turns known as life. Often it is easier said than done especially for those with arthropathy and joint pains. However, we must fight the battle and remain as mobile and dynamic as possible. Because data shows that our quality of life, overall health, and even life expectancy itself are greatly impacted by our patterns of activity.
By Dr. J | American Board of Internal Medicine certified Nephrologist and Internal Medicine specialist with over 30 years of clinical experience 08 Aug, 2022
Osteoarthritis is commonly referred to as the “wear and tear” degenerative joint disease. It typically results from the gradual loss of cartilage - the tough connective tissue that is within/between joints. In a way too simple analogy of this complex mechanism - this cartilage serves as essentially a shock absorber preventing direct shear force or “bone on bone” pressure. Once the shock absorber is weakened/gone – trauma will slowly lead to inflammation and erosion of the joint (PAIN!). This leads to a pretty straightforward question - is there a way to repair or at the least slow down the decline of cartilage? Enter Glucosamine - which is an amino sugar and precursor in the synthesis of glycosylated lipids and proteins. It is a natural compound that exists in our cartilage. 
By Dr. J | American Board of Internal Medicine certified Nephrologist and Internal Medicine specialist with over 30 years of clinical experience 31 Jan, 2022
Osteoarthritis is one of the most common medical conditions in the world and is commonly referred to as “wear and tear” degenerative joint disease. It typically results from the gradual loss of cartilage within/between joints. This cartilage serves as a type of shock absorber preventing direct shear force and “bone on bone” pressure. Once the shock-absorber is gone it will slowly lead to inflammation and erosion of the joint. US Centers for Disease Control data estimate approx 60 million people with doctor diagnosed arthritis – and remember many people live with joint aches/pain without seeing a physician or getting a formal diagnosis of OA. Sadly the symptoms of OA simply do not stop at the joint. The Arthritis Foundation notes that individuals with OA are almost three times more likely to develop cardiovascular disease (CVD) or heart failure than those without OA. Also, people with osteoarthritis experience as much as 30 percent more falls and have a 20 percent greater risk of fracture than those without OA. These links are especially strong when arthritis is in certain weight bearing/balance joints, such as the knee/back/hip. It makes sense – pain/weakness especially in our stabilizing joints such as knees/hips/spine will limit mobility and lead to risk factors such as weight gain, cardiovascular disease, diabetes coupled with stability issues. These patients would have difficulty following American Heart Association recommendation s that recommend increased physical activity and note that becoming more active can help lower blood pressure and also boost levels of good cholesterol. Without regular physical activity, the body slowly loses its strength, stamina and ability to function well - People who are physically active live about 7 years longer than those who are not active and are obese (American Heart Association). Studies have shown that adults who are inactive/minimally active more than 4 hours a day had a 46% increased risk of death from any cause and an 80% increased risk of death from cardiovascular disease! So now let us focus on some of the clinical presentations of Osteoarthritis (OA). In general there is a marked variability of disease expression. Although most patients present with joint pain and functional limitations, the age of disease onset, sequence of joint involvement, and disease progression vary from person to person. OA ranges from an asymptomatic, incidental finding on clinical or radiologic examination to a progressive disabling disorder eventually culminating in "joint failure" with impaired mobility and quality of life. The primary symptoms of osteoarthritis (OA) are joint pain, stiffness, and motor restriction. Symptoms usually present in just one or a few joints in a middle-aged or older person. Other manifestations in patients with OA include sequelae such as muscle weakness, poor balance, and associated conditions such as fibromyalgia (a disorder characterized by widespread musculoskeletal pain accompanied by fatigue, sleep, memory and mood issues).
By Dr. J | American Board of Internal Medicine certified Nephrologist and Internal Medicine specialist with over 30 years of clinical experience 20 Sep, 2021
Falls are a major issue especially in our elderly population and falls are the leading cause of injury, both fatal and nonfatal, among older adults in the United States . I can not even count the number of lives that were significantly (and often times permanently) changed after a fall through my decades of practice as a Nephrologist and Internist.
By Dr. J | American Board of Internal Medicine certified Nephrologist and Internal Medicine specialist with over 30 years of clinical experience 05 Sep, 2021
Cultures around the world, originally in eastern philosophy, have utilized mind body movement exercises for generations for various potential mental and physical benefits. These practices have increased in popularity and scope and are now truly global disciplines such as yoga and tai chi . Yoga likely was founded in Indi a and entails discipline in physical, mental, and spiritual realms with originally strong followings in the hindu and buddhist doctrines. It has morphed from being tied to a single country and also bypassed religious connotations. The term "yoga" in the Western world often denotes a modern form of hatha yoga and posture-based physical fitness, stress-relief, and relaxation techniques sometimes accompanied with breathing exercises The focus of yoga in this modern sense is to blend posture based positions/poses to help facilitate exercise for the body and potentially mind. There are many different disciplines/variations of Yoga with significant fluctuations in their physical demands. Many researchers/physicians attempt to quantify the strenuousness of exercises by their energy cost of exercise commonly measured in metabolic equivalent of task (MET). Less than 3 METs counts as light exercise; 3 to 6 METs is moderate; 6 or over is vigorous. American College of Sports Medicine and American Heart Association guidelines count periods of at least 10 minutes of moderate MET level activity towards their recommended daily amounts of exercise. For healthy adults aged 18 to 65, the guidelines recommend moderate exercise for 30 minutes five days a week, or vigorous aerobic exercis e for 20 minutes three days a week. Treated as a form of exercise, a complete yoga session with asanas (body posture) and pranayama (focusing on breath) discipline provides 3.3 ± 1.6 METs which would be classified as an average/moderate workout in strenuousness. There have been several hundred published articles/scientific trials on Yoga and its potential health benefits. Let us focus on some of the data for arthropathy. In one randomized control trial by Deepeshwar et al - Sixty-six individual diagnosed with with knee osteoarthritis (ages between 30 and 75 yo) were randomized into two groups. One group would then participate in yoga for 1 week at a yoga center ( n = 31) and then a control ( n = 35) group who did not participate in any yoga activities. Multiple functional tests were performed on day 1 and then at day 7 - including the Falls Efficacy Scale (FES), Handgrip Strength test (left hand LHGS and right hand RHGS), Timed Up and Go Test (TUG), Sit-to-Stand (STS), and right & left extension and flexion. Results indicated a significant reduction in TUG ( p < 0.001), Right ( p < 0.001), and Left Flexion ( p < 0.001) whereas significant improvements in LHGS ( p < 0.01), and right extension ( p < 0.05) & left extension ( p < 0.001) from baseline was found in the yoga group. This would suggest improved muscular strength, flexibility, and functional mobility in the yoga group. This was a small study that also was completed over a short time frame (1 week) but did show marked functional improvements. Let us look at more data via a large review by Haaz et a l . Researchers combed through peer-reviewed clinical trials (published from 1980-2010) that used yoga as an intervention for arthritis patients and reported quantitative findings. Eleven studies were identified, including four randomized control trials and four non randomized trials. The trials reviewed data is below in the table.
By Dr. J | American Board of Internal Medicine certified Nephrologist and Internal Medicine specialists with over 30 years of clinical experience 22 Aug, 2021
Let us review an interesting study from the Harvard medical system published in the American Journal of Clinical Nutritio n and also Osteoarthritis and Cartilage Journal by Xu et all dealing with the potential impacts of dietary intake patterns and progression of Knee osteoarthritis. There is an age old saying - "You are what you eat" and there has been past data on certain foods/nutrients linked with outcome effects on knee arthritis such as (click the links below for reference articles): Soft drink consumption (potential increased risk of OA progression) Milk consumption (potential decreased risk of OA progression particularly in women) Dietary fat intake (potential increased risk of OA progression) Strawberrie s (potential decreased risk of OA progression particularly in obese adults) Fiber intake (potential decreased risk of OA progression) We also know of many herbs that have varying arthritis control data (some very convincing) and our own Organic Arthritis Herbal Supplement is composed of strong data driven herbs for arthropathy control. There have been past study links between a general Mediterranean diet having a relative lower risk of and improved overall symptom control of knee OA. This study focuses more on overall diet classes and effects on osteoarthritis. This study compares two diet classes based on the Scree test via individual diet questionnaires: Western Diet - composed of high intakes of red and/or processed meats, refined grains, and french fries Prudent Diet - composed of high intakes of vegetables, fruit, fish, whole grains, and legumes
By Dr. J | American Board of Internal Medicine certified Nephrologist and Internal Medicine specialists with over 30 years of clinical experience 06 Aug, 2021
Arthritis is one of the most common medical conditions diagnosed in the United States and world-wide. CDC US data notes there are approximately 60 million individuals battling arthropathy with that estimate rapidly growing to an estimated 78 million (26%) US adults aged 18 years or older projected to have doctor-diagnosed arthritis by 2040 .
By Dr. J | American Board of Internal Medicine certified Nephrologist and Internal Medicine specialists with over 30 years of clinical experience 12 Jul, 2021
Many of us have heard of the medical term INSOMNIA . It refers to a medical condition in which individuals have difficulty falling, staying, or getting back to sleep. There can be short term sleep issues lasting nights or weeks, termed acute insomnia , or long term sleep disturbances ranging months to years, termed chronic insomnia . This can lead to a multitude of general health ramifications. The first question - how much sleep is recommended daily? According to United States Centers for Disease control recommendations - adults should generally have 7 or more hours of sleep nightly to help ensure optimal functional status. This CDC table below helps show National Sleep Foundation and American Academy of Sleep Medicine recommendations:
Knee Arthritis - a review on exercise, weight loss, and physical therapy!
By Dr. J | a board certified Internist and Nephrologist practicing in the DC/Metropolitan area with over 30 years of clinical experience 13 Jun, 2021
Knee Arthritis - a review on exercise, weight loss, and physical therapy!
By Dr. J | a board certified Internist and Nephrologist practicing in the DC/Metropolitan area with over 30 years of clinical experience 11 Jun, 2021
There is a strong chance all of us are aware of or have used non-steroidal anti-inflammatory drugs (commonly referred to as NSAIDs) in our lifetimes. There also is a good chance many have been told by their medical providers to avoid using NSAIDs especially long term given the risk factors for particular those with chronic kidney disease, congestive heart failure, resistant hypertension, gastritis/stomach ulcers, or even those with electrolyte concerns such as hyperkalemia (high potassium) or hyponatremia (low sodium). Despite these risks – NSAIDs are simply the most recommended/prescribed anti-inflammatory medications in the world today. This class of medications includes such commonplace names as (click underlined links below for more info): 1) Advil 2) Aleve 3) Ibuprofen 4) Motrin 5) Naprosyn/Naproxen 6) Diclofenac/Voltaren 7) Celebrex/Celecoxib 8) Mobic (Meloxicam) 9) Indomethacin/Indocin Though often times effective for inflammatory control - there are several noted risks to NSAIDs particularly in those with chronic kidney disease. NSAIDs provide their analgesic, anti-inflammatory, and antipyretic actions through inhibition of cyclooxygenase (COX) enzymes – which convert arichidonic acid (released from cell membranes) to prostaglandins and thromboxanes. This graphic in the American Journal of Kidney Disease highlights this COX cascade pathway affects:
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