Flowcytometric Study of T-cell Subset
And Natural Killer Cells in Peripheral
Blood of Art of Living Teachers, Normal
Subjects and Cancer PatientsDr. Satya N. Das

adaptive and potentially can lead to disease. Certainly,
relaxation techniques like Sudarshan Kriya and Pranayam
may have profound effect on the reversal of the stress thereby
it may potentiate the immune functions of the host. Despite
therapeutic adaptation of the relaxation response for a varietyof somatic disorders, its impact on the immune system remains
unknown.

Department of Biotechnology,&Dr. Vinod Kochupillai,
Prof. & Head Medical Oncology,
Chief IRCH
All India Institute of MedicalSciences, New Delhi

It has been well documented that cancer in most cases, isassociated with immuno-suppression and a better immune
response is associated with better prognosis Most of the cancer
patients have shown to have more stress and anxiety not only
because of its diagnosis but due to treatment as well. Most ofthe anti cancer drugs are antiproliferative and lead to
immunosuppression that may persist during the period ofremission. Such down regulation of immune response could
be related to higher degree of recurrence in such cases.

Abstract
T-lymphocyte subsets (T-helper and T-suppressor cells) andNatural Killer (NK) cells has been recognized as an important
cellular component of the immune system. T-helper cells
mediates immune response by providing help to Blymphocytes in antibody production as well as these cells on
activation produces soluble factors that amplifies immune
response of the host. On the other hand T- suppressor/
cytotoxic cells are capable of killing tumor and infected cells.
NK cells are surveillance cells of the immune system that candirectly destroy tumor cells and infected cells very efficiently
without any prior sensitization. Considering their importancein immune response, present study was done to enumeratethese cells in peripheral blood of ‘Art of Living (AOL)’ teachers,
normal controls and cancer patients by flowcytometry in order
to find out if there is any change in these groups.

Therefore, present study has been planned to observe immune
status of AOL teachers, cancer patients and normal subjects
by quantitative estimation of major lymhocyte subsets in theperipheral blood using two colour flowcytometry technique.

Materials And Methods
This study was done on 17 AOL teachers, 17 cancer patientsand 63 normal subjects of either sexe. Age of the subjects
ranged from 18 to 65 years. Blood samples were drawn at 10
am from all the subjects to avoid diurnal variation.
Fluorescence staining for major lymphocyte subsets (total T,T-helper, T-suppressor/cytotoxic and NK ) cells was done byusing FITC / PE labelled monoclonal antibody (CD3, CD4,CD8 and CD16/56) respectively by whole blood lysis methodas per manufacturer’s instructions. About 10,000 events wereacquired in flowcytometer (Becton –Dickinson, USA). The data
was analyzed using CELL QUEST computer software asshown in fig.1.

In the present study total T-cells and its T-helper subset weresignificantly higher in AOL teachers and normal controls ascompared to cancer patients. However, no significant
difference occurs in these cells between AOL teachers andnormal subjects. A significant difference was found in NK
cells that was significantly higher (p<.0001) in AOL teachers
as compared to normal and cancer patients. No significant
difference was seen in NK cell population between normal
subjects and cancer patients. Since other factors are same innormal subjects and AOL teachers the higher NK cells in AOL
teachers could be attributed to the practice of AOL (SudarshanKriya).

Results And Discussion
The results have been shown in Fig. 2. In the present study
total T-cells and its T-helper subset were significantly higherin AOL teachers and normal controls as compared to cancer
patients. However, no significant difference occurs in thesecells between AOL teachers and normal subjects. A significant
difference was found in NK cells that was significantly higher(p<0.001) in AOL teachers as compared to normal and cancer
patients. No significant difference was seen in NK cell
population between normal subjects and cancer patients. Sinceother factors being the same both in normal subjects and AOL
teachers the higher NK cells in AOL teachers could be
attributed to the practice of AOL (Sudarshan Kriya). It seems
therefore, that regular practice of SKP leads to enhanced NKcell population.

Introduction
The deciphering of a common language for brain and immune
system seems to herald a dramatically new view of this tworecognition network and the way they interact. Physical andpsychological stimuli may set a pattern of neurotransmitter,
hormones and cytokines which may act on receptors of
immune cells causing alteration of its effector population andfunction through induction of chemical mediators likecytokines (Blalock 1994). In turn cytokines can act on the brain
cells and endocrine cells through their receptor to modulate
their functions.
It has been shown beyond doubt that stress is associated witha distinct set of physiological changes, most notably on theimmune-neuro-endocrine axis (Brines,1994). These are non-The physiology of relaxation response is complex. Its features46

are opposed to the findings of acute and chronic stress andinclude decreased heart rate, blood pressure, and peripheral
muscle tonus and oxygen consumption. Recent neurological
data indicate a global decrease in cerebral blood flow to theamygdala, prefrontal and orbital gyri and septal nuclei (Lazaret al 2000).

measures associated with NK-cell activity and cell mdiatedImmunity (Bittman et al 2001). Group drumming resulted inincreased dehydroepiandrosterone to cortisol ratio, increased
NK- cell activity and increased lymphokine activated killer(LAK) cell activity.
Therefore, it seems that the relaxation techniques haveprofound effect on protective immunity of the host. However,a detailed systematic and multi-parametric study of immune
functions in subjects undergoing Sudarshan Kriya andPranayam would be most essential and useful to establish it
as an alternate therapy for subjects suffering from stress andstress related disorders.

There are some studies suggesting profound effect of relaxation
exercise on brain, behaviour and neuroendocrine immune axis.
Salivary immunoglobulins have been reported to be increased
in response to a single session of relaxation response elicitedby attention to breathing in group session (Green et al 1987,88). In other studies relaxation techniques have shown toenhance cellular immunity, particularly delayed
hypersensitivity (DTH), response (Black 1963) and mitogen
responses to isolated lymphocytes (Mc Grady et.al.1992). Bothmitogenic response and DTH response are the effective
parameters of T-helper cell activity. NK- Cells are the effector
cells of the innate immunity. Recently NK Cells gained higher
importance as these were shown to be activated in response tolymphokines (IL-2, IFN-g) and are transformed into
lymphokine activated killer (LAK) cells that show augmented
cytotoxic response against tumour cells. Progressive relaxationintervention has shown augmented NK- cell activities(Zachariae et al 1990, Mc Grady 1992). In another study
Ironson (1995) noted significantly higher expression of IL-2
receptor and antibody titre to Epstein-Barr Virus (EBV) insubjects undergoing relaxation techniques. A recent study on
111 subjects of both sexes have shown that group drummingmusic therapy has a potential for alteration of stress related
hormones and enhancement of specific immunologicalReferences
1. Bittman, BB et al (2000). Altern. Ther. Health Med. 7, 38.
2. Black S. et al (1963). Br. Med. J. 1, 990.
3. Ironson, G. et al (1995). Mind Body Med. 1, 85.
4. Lazar, SW et al (2000) Neuro Report 11, 1581.
5. Mc Grady, A. et al (1992). J. Behav. Med. 15, 343.
6. Zachariae, R. et al (1990).
Psychosomatics 54, 32.

Psychotherapy and7. Blalock JD (1994). Immunol. Today.15, 504.
8. Brines R (1994). Immunol. Today. 15, 503.

ABC

DFig.2 : T-cell sub sets and Natural Killer Cells in different groups (*p<0.001). All the research at AIIMS has been :Inspired by Sri Sri Ravi Shankar Ji,Carried out in collaboration withVed Vignan Mahavidyapeeth, Bangalore, Funded by Central Council of Research in Yoga and Naturopathy, New Delhi.

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