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Biomedical subjects

H C Dung

Publications and source records attributed to H C Dung.

At least 19 recordsLinked to original sources
PubMed1985

Acupuncture points of the typical spinal nerves.

Typical spinal nerves have six cutaneous branches which reach to the skin of the body wall in the thorax and abdomen. Each of these six cutaneous branches correlates to an acupuncture point. This communication describes acupuncture points found in the thoracic and abdominal walls using anatomic nomenclature relating to cutaneous branches of the spinal nerves.

Acupuncture Therapy↗
PubMed1985

Acupuncture points of the brachial plexus.

This publication is the third of a total of six papers intended to name acupuncture points following the anatomic nomenclatures. In the first publication, acupuncture points in the head are named using terminal branches of the trigeminal nerve and the muscles of facial expression. In the second publication, acupuncture points in the neck are named using the cutaneous nerves of the cervical plexus and neuromuscular attachments formed by the spinal accessory nerve on the trapezius muscle. In this third publication, acupuncture points existing on the upper limbs are described following the terminal branches of the brachial plexus.

Acupuncture Therapy↗
PubMed1985

Acupuncture points of the lumbar plexus.

This communication is the fifth in a series of six publications describing acupuncture points by anatomic nomenclature. This article describes acupuncture points in the lumbar region of the posterior body wall, the inguinal and pelvic regions of the lower abdomen, and the medial surface of the thigh and leg. Acupuncture points in these regions are generally established by anatomic features of the lumbar spinal nerves. Nerve branches of the posterior primary rami of the lumbar spinal nerves and the lumbar plexus provide the anatomic basis for acupuncture points in these regions and are used to name the points accordingly.

Acupuncture Therapy↗
PubMed1985

Acupuncture points of the sacral plexus.

This is the sixth and final communication in a series describing acupuncture points by anatomic nomenclature. Most acupuncture points on the lateral and posterior surfaces of the lower limb are located along routes of the sacral plexus. These points belong to acupuncture meridians carrying "Yang energy" in the lower limbs. The meridians are traditionally known as the Urinary Bladder on the posterior surface of the lower limb, Gall Bladder on the lateral surface of the lower limb, and Stomach on the anterior surface of the leg and dorsum of the foot.

Acupuncture Therapy↗
PubMed1984

Tumor growth rate varies with age in lethargic mutant BALB/cGnDu mice.

BALB/cGnDu lethargic mutant mice suffer from an age-related temporary defect in their cell-mediated immune response which is "spontaneously" corrected in animals 7 weeks of age or older. Thus, mutants of different ages (3 to 4 weeks old and 7 to 9 weeks old) were used to compare tumor incidence, tumor growth rate, and host survival time of Harding-Passey (HP) melanoma, mKSA, and GI110(BK)B6D2Tu tumors. Normal littermates were used as controls. Only the HP tumor was successfully transplanted in all recipients. In the 3- to 4-week-old lethargic mutants, the HP tumor had an increased growth rate and decreased the mean lifespan of the mice, when compared to normal littermates, but only one mKSA and no GI110(BK)B6D2Tu tumors proved transplantable. In contrast, lethargic mutants 7 to 9 weeks old injected with the HP tumor survived longer than their normal littermates, and they did not accept either of the other tumors tested. These results corroborate the notion that lethargic mutant mice have a partially impaired anti-tumor cell-mediated immune response at 3 to 4 weeks of age, but that their anti-tumor response is enhanced at the time of their "spontaneous" correction of the immune deficiency. The need for future studies on the possible use of this model to study various human immunological and adrenal disorders is discussed.

Age Factors↗
PubMed1984

Acupuncture points of the cranial nerves.

An attempt is made to name most of the acupuncture points in the face and forehead region using anatomic nomenclature known to western medicine. All acupuncture points in the face and forehead region are located along terminal or cutaneous branches of the trigeminal nerve and the motor points formed between muscular branches of the facial nerve to the muscles of facial expression. It is believed such nomenclatures will be comprehensible to basic medical scientists and clinical practitioners who have knowledge of anatomical sciences.

Acupuncture Therapy↗
PubMed1984

Acupuncture points of the cervical plexus.

Acupuncture points in the neck region are basically distributed along the terminal branches of the cervical plexus. There are two components of the plexus, cutaneous and muscular. The cutaneous component of the cervical plexus consists of four major branches which are the lesser occipital, great auricular, transverse cervical, and supraclavicular nerves. Practically all of the acupuncture points in the neck are found along the routes of these cutaneous nerves. It is suggested that acupuncture points in this region be names according to the anatomical designation of these nerves.

Accessory Nerve↗
PubMed1983

Change in water proton relaxation time during erythrocyte maturation.

Erythrocyte populations from newborn and mature mice were characterized according to: size; ultrastructural features; water content; concentration of intraerythrocyte elements including Na, Cl, K, P, S, Mg, and Fe; and the spinlattice (T1) and spin-spin relaxation times of water protons as measured by nuclear magnetic resonance (NMR) spectroscopy. A significant increase in the T2 time from 142 +/- 3 msec to 184 +/- 3 msec occurred during erythrocyte maturation. This change in T2 time was correlated with a change from a polyribosome-rich hemoglobin-poor cell type to a polyribosome-absent hemoglobin-rich cell type. The change in T2 time could also be correlated to a significantly higher K and P concentration in the mature erythrocytes. The change in T2 time was not correlated to a change in cellular water content or to the concentration of any of the other elements measured by electron probe X-ray microanalysis. If the NMR relaxation times of water molecules truly reflect their average motional freedom, then the findings suggest that greater water ordering interaction occurs in the ribosome containing immature erythrocyte.

Animals↗
PubMed1979

Serum proteins of mice with splenomegaly.

Our earlier serum electrophoretic study in 'lethargic' mutant mice showed that the quantity of protein in 1 band is inversely related to the size of the spleen. In this study, we demonstrate that this protein band almost entirely disappears in mice with splenomegaly following spontaneous skin infection. The results suggest that this serum protein may play a role in regulating growth of lymphoid tissue.

Animals↗
PubMed1977

Deficiency in the thymus-dependent immunity in "lethargic" mutant mice.

T cell function of "lethargic" mutant mice which exhibit spontaneous thymic involution was evaluated by skin transplantation and graft-versus-host reaction tests. At 15 to 30 days of age, the mutant mice did not reject skin allografts, but by 45 days of age their response was normal. Spleen cells from 24-day-old mutant donors demonstrated delayed appearance of graft-versus-host induced splenomegaly in F1 recipients. Implications of these results in understanding the immunological status of lethargic mice were considered.

Animals↗
PubMed1977

A study of the increased serum level of IgG1 in 'lethargic' mice combined with a depressed thymus-dependent lymphoid system.

In a series of recent studies on 'lethargic' mice, a neurological mutation of the mouse, significant abnormalities were discovered in the thymus and its dependent regions in the lymph nodes and spleen. The present study was made as an approach toward finding the possible causes for these abnormalities. Serum IgG1 levels were stldied in 'lethargic' mutants at the age when severe deficiency of the thymus-dependent lymphoid system is known to occur in the animal. Using the radial immunodiffusion method, it was found that serum IgG1 levels are always significantly higher in 'lethargic' mice than in their normal littermates. Possible causes of the higher IgG1 in the serum of 'lethargic' mice are discussed. The authors note the similarities of other mouse mutations to that of the 'lethargic' mouse and propose the possibility that a common mechanism may account for immunologic deficiencies in several types of mutant mice.

Animals↗
PubMed1976

Relationship between the adrenal cortex and thymic involution in "lethargic" mutant mice.

To determine if the adrenal gland plays a role in the thymic involution which occurs spontaneously in "lethargic" mutant mice, three different studies were made. Morphological studies were made first to determine if there was an indication of histological changes in the adrenal glands. Next, serum levels of corticosterone were measured by radioimmunoassay. Finally, mice were unilaterally adrenalectomized to see if such treatment would improve various symptoms of "lethargic" mutants. Results of the studies showed that lipid granules in the cortical cells of "lethargic"mutants were greatly reduced in number during the time of spontaneous thymic involution, and the mutant mice had a significantly higher level of serum corticosterone than the normal controls. Mutant mice unilaterally adrenalectomized at 15 days of age showed a marked improvement in their condition and their mortality rate decreased. It is concluded that spontaneous thymic involution of "lethargic" mutants is probably associated with adrenocortical hypersecretion.

Adrenal Cortex↗