2.5 Living Within a New Biological Reality

In the previous sections, we explored how biology communicates.

Cells interpret information. Organs exchange messages. Adaptive responses become physiology.

Over time, those responses reinforce one another through feedback loops.

Eventually, a new physiological state emerges.This naturally leads to another question.

For many people living with type 1 diabetes, diagnosis is often viewed as the end of one story.

From a systems perspective, however, it marks the beginning of another. The conversations that contributed to the emergence of diabetes do not simply disappear. Some become quieter. Others become louder. Entirely new conversations begin.

The body reorganizes itself around a new biological reality.

Stable Does Not Mean Restored

One of the remarkable properties of living systems is their ability to establish stability under extraordinarily difficult conditions. I often find myself questioning how those with well-managed long term T1D don't have more successful efforts by the body to return to function.

The idea being that the body implicitly functions to return to its highest available operating capacity. And with the relative stability established with well managed T1D, what's preventing the body from accessing greater capacity?

The stability of properly cared for T1D should never be mistaken for the restoration of normal physiology. We've come to assume those with T1D are operating at their greatest capacity. Re: They've simply lost that ability and cannot regain it. This IS the new normal. (But is it?)

But I don't believe that persistence should be mistaken for permanence.

These are different ideas. A river diverted by a landslide continues to flow. The surrounding ecosystem adapts. New channels form. The river survives. Yet it is not identical to the river that existed before.

Type 1 diabetes may be understood in a similar way, both newly diagnosed and long-standing cases. The organism remains profoundly alive. It continues sensing. interpreting, adapting, repairing and compensating.

Its biology has not stopped. Its biology has reorganized.

Three Families of Feedback Loops

One of the central ideas emerging from this series is that not all feedback loops serve the same purpose.

Some contributed to the emergence of diabetes. Others help maintain the established physiological state. Still others represent the body's continual attempts to restore greater stability.

Understanding these distinctions changes how we think about chronic disease.

Each family participates in the conversation. Each part of the flow deserves to be understood on its own terms.

Disease-Producing Loops 🟨

These are the conversations that may gradually reduce physiological coherence before diagnosis. They are the variables at the root of the "Why do I have T1D?" conversation.

They are unlikely to be identical in every individual. Different people may arrive at the same destination through different combinations of biological pressures.

Possible contributors include:

• persistent inflammatory signaling

• nutrient deficiencies and imbalances

• oxidative stress

• loss of redox buffering

• endoplasmic reticulum burden

• altered calcium handling

• declining first-phase insulin secretion

• changing beta-cell identity

• increasing immune attention

• disrupted organ-to-organ communication

No single conversation necessarily explains the whole story. Rather, these conversations gradually reshape the environment in which beta cells make decisions.

Disease-Maintaining Loops 🟥

Diagnosis changes the biological landscape. Absolute insulin deficiency no longer defines the entire conversation.

Exogenous insulin enters the system.

Continuous glucose monitoring may enter the system.

Dietary planning.

Exercise.

Technology.

Human decision-making.

These additions transform physiology. Yet they do not recreate the original biological conversation. Instead, a different set of feedback loops becomes increasingly important.

Notice that this loop does not imply failure. It simply illustrates adaptation. The organism has learned (and continues to learn) to function under fundamentally different conditions.

Adaptive Loops 🟩

Perhaps the most inspiring conversations are those that exist not to produce disease but to preserve life despite it.

Every day, people living with type 1 diabetes participate in countless adaptive loops.

• Monitoring glucose.

• Adjusting insulin.

• Choosing meals.

• Walking after dinner.

• Responding to illness.

• Correcting hypoglycemia.

• Learning patterns.

These are not merely behaviors. They become biology. Each action changes the information reaching tissues throughout the body.

• Exercise alters insulin sensitivity.

• Sleep changes hormonal signaling.

• Food reshapes incretin release and microbial metabolism.

• Technology reduces glucose variability.

Adaptive loops continually increase coherence within the constraints that remain. Rather than representing failure, they reflect one of biology's defining characteristics: The continual pursuit of stability.

Exogenous Insulin Joins the Conversation

Perhaps no participant changes the biological landscape more profoundly than exogenous insulin.

Without it, absolute insulin deficiency rapidly leads to severe metabolic instability. Its introduction transforms what would otherwise become a life-threatening physiological cascade into a manageable chronic condition.

This achievement cannot be overstated.

Yet from the perspective of systems biology, insulin replacement accomplishes something very specific. It restores one extraordinarily important conversation. It does not recreate every conversation that once existed.

Injected insulin communicates:

• nutrients should be stored

• glucose uptake should increase

• hepatic glucose production should decline

• fat breakdown should slow

These messages are both powerful and lifesaving.

Yet endogenous beta cells once communicated much more than insulin alone.

• They released insulin in rapid pulses.

• They delivered it first to the liver through the portal circulation.

• They synchronized with neighboring beta cells.

• They restrained alpha cells through local insulin, zinc, GABA, and other paracrine signals.

• They responded within seconds to changing metabolic conditions.

The remarkable success of insulin therapy lies not in perfectly recreating these conversations.

Its success lies in restoring enough coherence for life to continue.

Additionally, when we look to the necessary conditions for beta cell return to function, given the singular nature of exogenous insulin's stability, how can we best create conditions of safety and stability in the other aspects of beta cell health? What else is the T1D body asking for in order for beta cells to come back online?

The Conversations That Continue

Although insulin replacement changes physiology dramatically, many biological conversations continue largely outside its direct influence.

The liver continues sensing nutrient availability.

The gut continues releasing incretin hormones and microbial metabolites.

The immune system continues surveying tissues.

The extracellular matrix continues remodeling.

Circadian rhythms continue coordinating metabolism.

The nervous system continues integrating stress, movement, and energy balance.

Even residual beta cells, when present, continue interpreting their environment.

The orchestra has not stopped performing. Several instruments now play different parts. Others play more quietly. New musicians have entered. The composition itself has changed.

Biological Memory

One reason chronic diseases persist is that biology remembers.

The immune system remembers previous encounters, arms itself for previous complications. Gene expression reflects prior environmental exposures. Connective tissues remodel. Neural circuits adapt. Hormonal rhythms shift. Even organs learn new patterns of communication.

These memories help explain why chronic diseases can remain remarkably stable over time.

Living systems continually rewrite themselves. Some memories fade. Others strengthen. Still others are replaced as new biological experiences accumulate. This capacity for continual adaptation is one of the defining characteristics of life itself.

A Different Way of Seeing Type 1 Diabetes

Traditionally, diabetes is described as the consequence of insufficient insulin.

From the perspective developed throughout this installment, another description becomes possible.

Type 1 diabetes may be understood as a reorganized physiological state. Some conversations have become quieter. Others have become louder. New conversations have emerged. Many continue adapting every single day.

The body has not accepted diabetes. It has learned how to survive within it.

This distinction matters.

One implies resignation. The other reveals continual biological effort.

Current Working Model

One possible interpretation of long-standing type 1 diabetes is that it represents a dynamic physiological state maintained by interacting networks of feedback loops.

Some loops preserve altered metabolic relationships. Some compensate for those alterations. Others continue responding to ongoing biological information arriving from the immune system, liver, gut, nervous system, extracellular matrix, and endocrine pancreas.

Exogenous insulin becomes one of the most powerful new participants in this conversation. It restores enough coherence to sustain life while joining a much larger network of biological communication that continues adapting long after diagnosis.

The central question therefore changes. Rather than asking whether diabetes is simply present or absent, we begin asking:

Questions Worth Carrying Forward

• Which feedback loops are most responsible for maintaining the diabetic state?

• Which adaptive loops most effectively restore physiological coherence?

• How do residual beta cells participate in long-standing diabetes?

• Which biological memories remain fixed, and which remain surprisingly plastic?

• If chronic disease represents a reorganized physiological conversation, what kinds of interventions might gradually reshape that conversation over time?

• What maintenance and adaptive loops are impacted by exogenous insulin use? Which disease-producing loops remain even after insulin has been reintroduced?